/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/


 /* <div>#red-ui-workspace-chart
  *   \-  <svg> "outer"
  *       \- <g>
  *           \- <g>.red-ui-workspace-chart-event-layer "eventLayer"
  *                |- <rect>.red-ui-workspace-chart-background
  *                |- <g>.red-ui-workspace-chart-grid "gridLayer"
  *                |- <g> "groupLayer"
  *                |- <g> "linkLayer"
  *                |- <g> "dragGroupLayer"
  *                \- <g> "nodeLayer"
  */

RED.view = (function() {
    var DEBUG_EVENTS = false;
    2
    var space_width = 5000,
        space_height = 5000,
        lineCurveScale = 0.75,
        scaleFactor = 1,
        node_width = 100,
        node_height = 30;

    var touchLongPressTimeout = 1000,
        startTouchDistance = 0,
        startTouchCenter = [],
        moveTouchCenter = [],
        touchStartTime = 0;

    var workspaceScrollPositions = {};

    var gridSize = 20;
    var snapGrid = false;

    var activeSpliceLink;
    var spliceActive = false;
    var spliceTimer;
    var groupHoverTimer;

    var activeSubflow = null;
    var activeNodes = [];
    var activeLinks = [];
    var activeFlowLinks = [];
    var activeLinkNodes = {};
    var activeGroup = null;
    var activeHoverGroup = null;
    var activeGroups = [];
    var dirtyGroups = {};

    var selected_link = null,
        mousedown_link = null,
        mousedown_node = null,
        mousedown_group = null,
        mousedown_port_type = null,
        mousedown_port_index = 0,
        mouseup_node = null,
        mouse_offset = [0,0],
        mouse_position = null,
        mouse_mode = 0,
        mousedown_group_handle = null;
        moving_set = [],
        lasso = null,
        ghostNode = null,
        showStatus = false,
        lastClickNode = null,
        dblClickPrimed = null,
        clickTime = 0,
        clickElapsed = 0,
        scroll_position = [],
        quickAddActive = false,
        quickAddLink = null,
        showAllLinkPorts = -1,
        groupNodeSelectPrimed = false;

    var selectNodesOptions;

    var clipboard = "";

    // Note: these are the permitted status colour aliases. The actual RGB values
    //       are set in the CSS - flow.scss/colors.scss
    var status_colours = {
        "red":    "#c00",
        "green":  "#5a8",
        "yellow": "#F9DF31",
        "blue":   "#53A3F3",
        "grey":   "#d3d3d3"
    }

    var PORT_TYPE_INPUT = 1;
    var PORT_TYPE_OUTPUT = 0;

    var chart;
    var outer;
    var eventLayer;
    var gridLayer;
    var linkLayer;
    var dragGroupLayer;
    var nodeLayer;
    var groupLayer;
    var drag_lines;

    function init() {

        chart = $("#red-ui-workspace-chart");

        outer = d3.select("#red-ui-workspace-chart")
            .append("svg:svg")
            .attr("width", space_width)
            .attr("height", space_height)
            .attr("pointer-events", "all")
            .style("cursor","crosshair")
            .on("mousedown", function() {
                focusView();
            })
            .on("contextmenu", function(){
                d3.event.preventDefault();
            });

        eventLayer = outer
            .append("svg:g")
            .on("dblclick.zoom", null)
            .append("svg:g")
            .attr('class','red-ui-workspace-chart-event-layer')
            .on("mousemove", canvasMouseMove)
            .on("mousedown", canvasMouseDown)
            .on("mouseup", canvasMouseUp)
            .on("mouseenter", function() {
                if (lasso) {
                    if (d3.event.buttons !== 1) {
                        lasso.remove();
                        lasso = null;
                    }
                } else if (mouse_mode === RED.state.PANNING && d3.event.buttons !== 4) {
                    resetMouseVars();
                }
            })
            .on("touchend", function() {
                clearTimeout(touchStartTime);
                touchStartTime = null;
                if  (RED.touch.radialMenu.active()) {
                    return;
                }
                canvasMouseUp.call(this);
            })
            .on("touchcancel", canvasMouseUp)
            .on("touchstart", function() {
                var touch0;
                if (d3.event.touches.length>1) {
                    clearTimeout(touchStartTime);
                    touchStartTime = null;
                    d3.event.preventDefault();
                    touch0 = d3.event.touches.item(0);
                    var touch1 = d3.event.touches.item(1);
                    var a = touch0["pageY"]-touch1["pageY"];
                    var b = touch0["pageX"]-touch1["pageX"];

                    var offset = chart.offset();
                    var scrollPos = [chart.scrollLeft(),chart.scrollTop()];
                    startTouchCenter = [
                        (touch1["pageX"]+(b/2)-offset.left+scrollPos[0])/scaleFactor,
                        (touch1["pageY"]+(a/2)-offset.top+scrollPos[1])/scaleFactor
                    ];
                    moveTouchCenter = [
                        touch1["pageX"]+(b/2),
                        touch1["pageY"]+(a/2)
                    ]
                    startTouchDistance = Math.sqrt((a*a)+(b*b));
                } else {
                    var obj = d3.select(document.body);
                    touch0 = d3.event.touches.item(0);
                    var pos = [touch0.pageX,touch0.pageY];
                    startTouchCenter = [touch0.pageX,touch0.pageY];
                    startTouchDistance = 0;
                    var point = d3.touches(this)[0];
                    touchStartTime = setTimeout(function() {
                        touchStartTime = null;
                        showTouchMenu(obj,pos);
                        //lasso = eventLayer.append("rect")
                        //    .attr("ox",point[0])
                        //    .attr("oy",point[1])
                        //    .attr("rx",2)
                        //    .attr("ry",2)
                        //    .attr("x",point[0])
                        //    .attr("y",point[1])
                        //    .attr("width",0)
                        //    .attr("height",0)
                        //    .attr("class","nr-ui-view-lasso");
                    },touchLongPressTimeout);
                }
            })
            .on("touchmove", function(){
                    if  (RED.touch.radialMenu.active()) {
                        d3.event.preventDefault();
                        return;
                    }
                    var touch0;
                    if (d3.event.touches.length<2) {
                        if (touchStartTime) {
                            touch0 = d3.event.touches.item(0);
                            var dx = (touch0.pageX-startTouchCenter[0]);
                            var dy = (touch0.pageY-startTouchCenter[1]);
                            var d = Math.abs(dx*dx+dy*dy);
                            if (d > 64) {
                                clearTimeout(touchStartTime);
                                touchStartTime = null;
                            }
                        } else if (lasso) {
                            d3.event.preventDefault();
                        }
                        canvasMouseMove.call(this);
                    } else {
                        touch0 = d3.event.touches.item(0);
                        var touch1 = d3.event.touches.item(1);
                        var a = touch0["pageY"]-touch1["pageY"];
                        var b = touch0["pageX"]-touch1["pageX"];
                        var offset = chart.offset();
                        var scrollPos = [chart.scrollLeft(),chart.scrollTop()];
                        var moveTouchDistance = Math.sqrt((a*a)+(b*b));
                        var touchCenter = [
                            touch1["pageX"]+(b/2),
                            touch1["pageY"]+(a/2)
                        ];

                        if (!isNaN(moveTouchDistance)) {
                            oldScaleFactor = scaleFactor;
                            scaleFactor = Math.min(2,Math.max(0.3, scaleFactor + (Math.floor(((moveTouchDistance*100)-(startTouchDistance*100)))/10000)));

                            var deltaTouchCenter = [                             // Try to pan whilst zooming - not 100%
                                startTouchCenter[0]*(scaleFactor-oldScaleFactor),//-(touchCenter[0]-moveTouchCenter[0]),
                                startTouchCenter[1]*(scaleFactor-oldScaleFactor) //-(touchCenter[1]-moveTouchCenter[1])
                            ];

                            startTouchDistance = moveTouchDistance;
                            moveTouchCenter = touchCenter;

                            chart.scrollLeft(scrollPos[0]+deltaTouchCenter[0]);
                            chart.scrollTop(scrollPos[1]+deltaTouchCenter[1]);
                            redraw();
                        }
                    }
            });

        // Workspace Background
        eventLayer.append("svg:rect")
            .attr("class","red-ui-workspace-chart-background")
            .attr("width", space_width)
            .attr("height", space_height);

        gridLayer = eventLayer.append("g").attr("class","red-ui-workspace-chart-grid");
        updateGrid();

        groupLayer = eventLayer.append("g");
        linkLayer = eventLayer.append("g");
        dragGroupLayer = eventLayer.append("g");
        nodeLayer = eventLayer.append("g");
        drag_lines = [];

        RED.events.on("workspace:change",function(event) {
            if (event.old !== 0) {
                workspaceScrollPositions[event.old] = {
                    left:chart.scrollLeft(),
                    top:chart.scrollTop()
                };
            }
            var scrollStartLeft = chart.scrollLeft();
            var scrollStartTop = chart.scrollTop();

            activeSubflow = RED.nodes.subflow(event.workspace);

            RED.menu.setDisabled("menu-item-workspace-edit", activeSubflow);
            RED.menu.setDisabled("menu-item-workspace-delete",RED.workspaces.count() == 1 || activeSubflow);

            if (workspaceScrollPositions[event.workspace]) {
                chart.scrollLeft(workspaceScrollPositions[event.workspace].left);
                chart.scrollTop(workspaceScrollPositions[event.workspace].top);
            } else {
                chart.scrollLeft(0);
                chart.scrollTop(0);
            }
            var scrollDeltaLeft = chart.scrollLeft() - scrollStartLeft;
            var scrollDeltaTop = chart.scrollTop() - scrollStartTop;
            if (mouse_position != null) {
                mouse_position[0] += scrollDeltaLeft;
                mouse_position[1] += scrollDeltaTop;
            }
            if (RED.workspaces.selection().length === 0) {
                clearSelection();
            }
            RED.nodes.eachNode(function(n) {
                n.dirty = true;
                n.dirtyStatus = true;
            });
            updateSelection();
            updateActiveNodes();
            redraw();
        });

        RED.statusBar.add({
            id: "view-zoom-controls",
            align: "right",
            element: $('<span class="button-group">'+
            '<button class="red-ui-footer-button" id="red-ui-view-zoom-out"><i class="fa fa-minus"></i></button>'+
            '<button class="red-ui-footer-button" id="red-ui-view-zoom-zero"><i class="fa fa-circle-o"></i></button>'+
            '<button class="red-ui-footer-button" id="red-ui-view-zoom-in"><i class="fa fa-plus"></i></button>'+
            '</span>')
        })

        $("#red-ui-view-zoom-out").on("click", zoomOut);
        RED.popover.tooltip($("#red-ui-view-zoom-out"),RED._('actions.zoom-out'),'core:zoom-out');
        $("#red-ui-view-zoom-zero").on("click", zoomZero);
        RED.popover.tooltip($("#red-ui-view-zoom-zero"),RED._('actions.zoom-reset'),'core:zoom-reset');
        $("#red-ui-view-zoom-in").on("click", zoomIn);
        RED.popover.tooltip($("#red-ui-view-zoom-in"),RED._('actions.zoom-in'),'core:zoom-in');
        chart.on("DOMMouseScroll mousewheel", function (evt) {
            if ( evt.altKey ) {
                evt.preventDefault();
                evt.stopPropagation();
                var move = -(evt.originalEvent.detail) || evt.originalEvent.wheelDelta;
                if (move <= 0) { zoomOut(); }
                else { zoomIn(); }
            }
        });

        // Handle nodes dragged from the palette
        chart.droppable({
            accept:".red-ui-palette-node",
            drop: function( event, ui ) {
                d3.event = event;
                var selected_tool = $(ui.draggable[0]).attr("data-palette-type");
                var result = addNode(selected_tool);
                if (!result) {
                    return;
                }
                var historyEvent = result.historyEvent;
                var nn = result.node;

                var showLabel = RED.utils.getMessageProperty(RED.settings.get('editor'),"view.view-node-show-label");
                if (showLabel !== undefined && !/^link (in|out)$/.test(nn._def.type) && !nn._def.defaults.hasOwnProperty("l")) {
                    nn.l = showLabel;
                }

                var helperOffset = d3.touches(ui.helper.get(0))[0]||d3.mouse(ui.helper.get(0));
                var mousePos = d3.touches(this)[0]||d3.mouse(this);

                mousePos[1] += this.scrollTop + ((nn.h/2)-helperOffset[1]);
                mousePos[0] += this.scrollLeft + ((nn.w/2)-helperOffset[0]);
                mousePos[1] /= scaleFactor;
                mousePos[0] /= scaleFactor;

                if (snapGrid) {
                    mousePos[0] = gridSize*(Math.ceil(mousePos[0]/gridSize));
                    mousePos[1] = gridSize*(Math.ceil(mousePos[1]/gridSize));
                }
                nn.x = mousePos[0];
                nn.y = mousePos[1];

                var spliceLink = $(ui.helper).data("splice");
                if (spliceLink) {
                    // TODO: DRY - droppable/nodeMouseDown/canvasMouseUp/showQuickAddDialog
                    RED.nodes.removeLink(spliceLink);
                    var link1 = {
                        source:spliceLink.source,
                        sourcePort:spliceLink.sourcePort,
                        target: nn
                    };
                    var link2 = {
                        source:nn,
                        sourcePort:0,
                        target: spliceLink.target
                    };
                    RED.nodes.addLink(link1);
                    RED.nodes.addLink(link2);
                    historyEvent.links = [link1,link2];
                    historyEvent.removedLinks = [spliceLink];
                }

                RED.history.push(historyEvent);
                RED.nodes.add(nn);
                RED.editor.validateNode(nn);
                RED.nodes.dirty(true);
                // auto select dropped node - so info shows (if visible)
                clearSelection();
                nn.selected = true;
                moving_set.push({n:nn});
                updateActiveNodes();
                updateSelection();
                redraw();

                if (nn._def.autoedit) {
                    RED.editor.edit(nn);
                }
            }
        });
        chart.on("focus", function() {
            $("#red-ui-workspace-tabs").addClass("red-ui-workspace-focussed");
        });
        chart.on("blur", function() {
            $("#red-ui-workspace-tabs").removeClass("red-ui-workspace-focussed");
        });

        RED.actions.add("core:copy-selection-to-internal-clipboard",copySelection);
        RED.actions.add("core:cut-selection-to-internal-clipboard",function(){copySelection();deleteSelection();});
        RED.actions.add("core:paste-from-internal-clipboard",function(){importNodes(clipboard);});
        RED.actions.add("core:delete-selection",deleteSelection);
        RED.actions.add("core:edit-selected-node",editSelection);
        RED.actions.add("core:undo",RED.history.pop);
        RED.actions.add("core:redo",RED.history.redo);
        RED.actions.add("core:select-all-nodes",selectAll);
        RED.actions.add("core:zoom-in",zoomIn);
        RED.actions.add("core:zoom-out",zoomOut);
        RED.actions.add("core:zoom-reset",zoomZero);
        RED.actions.add("core:enable-selected-nodes", function() { setSelectedNodeState(false)});
        RED.actions.add("core:disable-selected-nodes", function() { setSelectedNodeState(true)});

        RED.actions.add("core:toggle-show-grid",function(state) {
            if (state === undefined) {
                RED.userSettings.toggle("view-show-grid");
            } else {
                toggleShowGrid(state);
            }
        });
        RED.actions.add("core:toggle-snap-grid",function(state) {
            if (state === undefined) {
                RED.userSettings.toggle("view-snap-grid");
            } else {
                toggleSnapGrid(state);
            }
        });
        RED.actions.add("core:toggle-status",function(state) {
            if (state === undefined) {
                RED.userSettings.toggle("view-node-status");
            } else {
                toggleStatus(state);
            }
        });

        RED.view.navigator.init();
        RED.view.tools.init();
    }

    function updateGrid() {
        var gridTicks = [];
        for (var i=0;i<space_width;i+=+gridSize) {
            gridTicks.push(i);
        }
        gridLayer.selectAll("line.red-ui-workspace-chart-grid-h").remove();
        gridLayer.selectAll("line.red-ui-workspace-chart-grid-h").data(gridTicks).enter()
            .append("line")
            .attr(
                {
                    "class":"red-ui-workspace-chart-grid-h",
                    "x1" : 0,
                    "x2" : space_width,
                    "y1" : function(d){ return d;},
                    "y2" : function(d){ return d;}
                });
        gridLayer.selectAll("line.red-ui-workspace-chart-grid-v").remove();
        gridLayer.selectAll("line.red-ui-workspace-chart-grid-v").data(gridTicks).enter()
            .append("line")
            .attr(
                {
                    "class":"red-ui-workspace-chart-grid-v",
                    "y1" : 0,
                    "y2" : space_width,
                    "x1" : function(d){ return d;},
                    "x2" : function(d){ return d;}
                });
    }

    function showDragLines(nodes) {
        showAllLinkPorts = -1;
        for (var i=0;i<nodes.length;i++) {
            var node = nodes[i];
            node.el = dragGroupLayer.append("svg:path").attr("class", "red-ui-flow-drag-line");
            if ((node.node.type === "link out" && node.portType === PORT_TYPE_OUTPUT) ||
                (node.node.type === "link in" && node.portType === PORT_TYPE_INPUT)) {
                node.el.attr("class","red-ui-flow-link-link red-ui-flow-drag-line");
                node.virtualLink = true;
                showAllLinkPorts = (node.portType === PORT_TYPE_OUTPUT)?PORT_TYPE_INPUT:PORT_TYPE_OUTPUT;
            }
            drag_lines.push(node);
        }
        if (showAllLinkPorts !== -1) {
            activeNodes.forEach(function(n) {
                if (n.type === "link in" || n.type === "link out") {
                    n.dirty = true;
                }
            })
        }
    }
    function hideDragLines() {
        if (showAllLinkPorts !== -1) {
            activeNodes.forEach(function(n) {
                if (n.type === "link in" || n.type === "link out") {
                    n.dirty = true;
                }
            })
        }
        showAllLinkPorts = -1;
        while(drag_lines.length) {
            var line = drag_lines.pop();
            if (line.el) {
                line.el.remove();
            }
        }
    }

    function updateActiveNodes() {
        var activeWorkspace = RED.workspaces.active();

        activeNodes = RED.nodes.filterNodes({z:activeWorkspace});

        activeLinks = RED.nodes.filterLinks({
            source:{z:activeWorkspace},
            target:{z:activeWorkspace}
        });

        activeGroups = RED.nodes.groups(activeWorkspace)||[];
    }

    function generateLinkPath(origX,origY, destX, destY, sc) {
        var dy = destY-origY;
        var dx = destX-origX;
        var delta = Math.sqrt(dy*dy+dx*dx);
        var scale = lineCurveScale;
        var scaleY = 0;
        if (dx*sc > 0) {
            if (delta < node_width) {
                scale = 0.75-0.75*((node_width-delta)/node_width);
                // scale += 2*(Math.min(5*node_width,Math.abs(dx))/(5*node_width));
                // if (Math.abs(dy) < 3*node_height) {
                //     scaleY = ((dy>0)?0.5:-0.5)*(((3*node_height)-Math.abs(dy))/(3*node_height))*(Math.min(node_width,Math.abs(dx))/(node_width)) ;
                // }
            }
        } else {
            scale = 0.4-0.2*(Math.max(0,(node_width-Math.min(Math.abs(dx),Math.abs(dy)))/node_width));
        }
        if (dx*sc > 0) {
            return "M "+origX+" "+origY+
                " C "+(origX+sc*(node_width*scale))+" "+(origY+scaleY*node_height)+" "+
                (destX-sc*(scale)*node_width)+" "+(destY-scaleY*node_height)+" "+
                destX+" "+destY
        } else {

            var midX = Math.floor(destX-dx/2);
            var midY = Math.floor(destY-dy/2);
            //
            if (dy === 0) {
                midY = destY + node_height;
            }
            var cp_height = node_height/2;
            var y1 = (destY + midY)/2
            var topX =origX + sc*node_width*scale;
            var topY = dy>0?Math.min(y1 - dy/2 , origY+cp_height):Math.max(y1 - dy/2 , origY-cp_height);
            var bottomX = destX - sc*node_width*scale;
            var bottomY = dy>0?Math.max(y1, destY-cp_height):Math.min(y1, destY+cp_height);
            var x1 = (origX+topX)/2;
            var scy = dy>0?1:-1;
            var cp = [
                // Orig -> Top
                [x1,origY],
                [topX,dy>0?Math.max(origY, topY-cp_height):Math.min(origY, topY+cp_height)],
                // Top -> Mid
                // [Mirror previous cp]
                [x1,dy>0?Math.min(midY, topY+cp_height):Math.max(midY, topY-cp_height)],
                // Mid -> Bottom
                // [Mirror previous cp]
                [bottomX,dy>0?Math.max(midY, bottomY-cp_height):Math.min(midY, bottomY+cp_height)],
                // Bottom -> Dest
                // [Mirror previous cp]
                [(destX+bottomX)/2,destY]
            ];
            if (cp[2][1] === topY+scy*cp_height) {
                if (Math.abs(dy) < cp_height*10) {
                    cp[1][1] = topY-scy*cp_height/2;
                    cp[3][1] = bottomY-scy*cp_height/2;
                }
                cp[2][0] = topX;
            }
            return "M "+origX+" "+origY+
                " C "+
                   cp[0][0]+" "+cp[0][1]+" "+
                   cp[1][0]+" "+cp[1][1]+" "+
                   topX+" "+topY+
                " S "+
                   cp[2][0]+" "+cp[2][1]+" "+
                   midX+" "+midY+
               " S "+
                  cp[3][0]+" "+cp[3][1]+" "+
                  bottomX+" "+bottomY+
                " S "+
                    cp[4][0]+" "+cp[4][1]+" "+
                    destX+" "+destY
        }
    }

    function addNode(type,x,y) {
        var m = /^subflow:(.+)$/.exec(type);

        if (activeSubflow && m) {
            var subflowId = m[1];
            if (subflowId === activeSubflow.id) {
                RED.notify(RED._("notification.error",{message: RED._("notification.errors.cannotAddSubflowToItself")}),"error");
                return;
            }
            if (RED.nodes.subflowContains(m[1],activeSubflow.id)) {
                RED.notify(RED._("notification.error",{message: RED._("notification.errors.cannotAddCircularReference")}),"error");
                return;
            }
        }

        var nn = { id:RED.nodes.id(),z:RED.workspaces.active()};

        nn.type = type;
        nn._def = RED.nodes.getType(nn.type);

        if (!m) {
            nn.inputs = nn._def.inputs || 0;
            nn.outputs = nn._def.outputs;

            for (var d in nn._def.defaults) {
                if (nn._def.defaults.hasOwnProperty(d)) {
                    if (nn._def.defaults[d].value !== undefined) {
                        nn[d] = JSON.parse(JSON.stringify(nn._def.defaults[d].value));
                    }
                }
            }

            if (nn._def.onadd) {
                try {
                    nn._def.onadd.call(nn);
                } catch(err) {
                    console.log("Definition error: "+nn.type+".onadd:",err);
                }
            }
        } else {
            var subflow = RED.nodes.subflow(m[1]);
            nn.name = "";
            nn.inputs = subflow.in.length;
            nn.outputs = subflow.out.length;
        }

        nn.changed = true;
        nn.moved = true;

        nn.w = node_width;
        nn.h = Math.max(node_height,(nn.outputs||0) * 15);
        nn.resize = true;

        var historyEvent = {
            t:"add",
            nodes:[nn.id],
            dirty:RED.nodes.dirty()
        }
        if (activeSubflow) {
            var subflowRefresh = RED.subflow.refresh(true);
            if (subflowRefresh) {
                historyEvent.subflow = {
                    id:activeSubflow.id,
                    changed: activeSubflow.changed,
                    instances: subflowRefresh.instances
                }
            }
        }
        return {
            node: nn,
            historyEvent: historyEvent
        }

    }

    function canvasMouseDown() {
if (DEBUG_EVENTS) { console.warn("canvasMouseDown", mouse_mode); }
        var point;
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }

        if (d3.event.button === 1) {
            // Middle Click pan
            mouse_mode = RED.state.PANNING;
            mouse_position = [d3.event.pageX,d3.event.pageY]
            scroll_position = [chart.scrollLeft(),chart.scrollTop()];
            return;
        }
        if (!mousedown_node && !mousedown_link && !mousedown_group) {
            selected_link = null;
            updateSelection();
        }
        if (mouse_mode === 0) {
            if (lasso) {
                lasso.remove();
                lasso = null;
            }
        }
        if (mouse_mode === 0 || mouse_mode === RED.state.QUICK_JOINING) {
            if (d3.event.metaKey || d3.event.ctrlKey) {
                d3.event.stopPropagation();
                clearSelection();
                point = d3.mouse(this);
                var clickedGroup = getGroupAt(point[0],point[1]);
                if (drag_lines.length > 0) {
                    clickedGroup = clickedGroup || RED.nodes.group(drag_lines[0].node.g)
                }
                showQuickAddDialog(point, null, clickedGroup);
            }
        }
        if (mouse_mode === 0 && !(d3.event.metaKey || d3.event.ctrlKey)) {
            if (!touchStartTime) {
                point = d3.mouse(this);
                lasso = eventLayer.append("rect")
                .attr("ox",point[0])
                .attr("oy",point[1])
                .attr("rx",1)
                .attr("ry",1)
                .attr("x",point[0])
                .attr("y",point[1])
                .attr("width",0)
                .attr("height",0)
                .attr("class","nr-ui-view-lasso");
                d3.event.preventDefault();
            }
        }
    }

    function showQuickAddDialog(point, spliceLink, targetGroup) {
        if (targetGroup && !targetGroup.active) {
            targetGroup.active = true;
            targetGroup.dirty = true;
            selectGroup(targetGroup,false);
            activeGroup = targetGroup;
            RED.view.redraw();
        }

        var ox = point[0];
        var oy = point[1];

        if (RED.settings.get("editor").view['view-snap-grid']) {
            // eventLayer.append("circle").attr("cx",point[0]).attr("cy",point[1]).attr("r","2").attr('fill','red')
            point[0] = Math.round(point[0] / gridSize) * gridSize;
            point[1] = Math.round(point[1] / gridSize) * gridSize;
            // eventLayer.append("circle").attr("cx",point[0]).attr("cy",point[1]).attr("r","2").attr('fill','blue')
        }

        var mainPos = $("#red-ui-main-container").position();

        if (mouse_mode !== RED.state.QUICK_JOINING) {
            mouse_mode = RED.state.QUICK_JOINING;
            $(window).on('keyup',disableQuickJoinEventHandler);
        }
        quickAddActive = true;

        if (ghostNode) {
            ghostNode.remove();
        }
        ghostNode = eventLayer.append("g").attr('transform','translate('+(point[0] - node_width/2)+','+(point[1] - node_height/2)+')');
        ghostNode.append("rect")
            .attr("class","red-ui-flow-node-placeholder")
            .attr("rx", 5)
            .attr("ry", 5)
            .attr("width",node_width)
            .attr("height",node_height)
            .attr("fill","none")
        // var ghostLink = ghostNode.append("svg:path")
        //     .attr("class","red-ui-flow-link-link")
        //     .attr("d","M 0 "+(node_height/2)+" H "+(gridSize * -2))
        //     .attr("opacity",0);

        var filter;
        if (drag_lines.length > 0) {
            if (drag_lines[0].virtualLink) {
                filter = {type:drag_lines[0].node.type === 'link in'?'link out':'link in'}
            } else if (drag_lines[0].portType === PORT_TYPE_OUTPUT) {
                filter = {input:true}
            } else {
                filter = {output:true}
            }

            quickAddLink = {
                node: drag_lines[0].node,
                port: drag_lines[0].port,
                portType: drag_lines[0].portType,
            }
            if (drag_lines[0].virtualLink) {
                quickAddLink.virtualLink = true;
            }
            hideDragLines();
        }
        if (spliceLink) {
            filter = {input:true, output:true}
        }

        var rebuildQuickAddLink = function() {
            if (!quickAddLink) {
                return;
            }
            if (!quickAddLink.el) {
                quickAddLink.el = dragGroupLayer.append("svg:path").attr("class", "red-ui-flow-drag-line");
            }
            var numOutputs = (quickAddLink.portType === PORT_TYPE_OUTPUT)?(quickAddLink.node.outputs || 1):1;
            var sourcePort = quickAddLink.port;
            var portY = -((numOutputs-1)/2)*13 +13*sourcePort;
            var sc = (quickAddLink.portType === PORT_TYPE_OUTPUT)?1:-1;
            quickAddLink.el.attr("d",generateLinkPath(quickAddLink.node.x+sc*quickAddLink.node.w/2,quickAddLink.node.y+portY,point[0]-sc*node_width/2,point[1],sc));
        }
        if (quickAddLink) {
            rebuildQuickAddLink();
        }


        var lastAddedX;
        var lastAddedWidth;

        RED.typeSearch.show({
            x:d3.event.clientX-mainPos.left-node_width/2 - (ox-point[0]),
            y:d3.event.clientY-mainPos.top+ node_height/2 + 5 - (oy-point[1]),
            filter: filter,
            move: function(dx,dy) {
                if (ghostNode) {
                    var pos = d3.transform(ghostNode.attr("transform")).translate;
                    ghostNode.attr("transform","translate("+(pos[0]+dx)+","+(pos[1]+dy)+")")
                    point[0] += dx;
                    point[1] += dy;
                    rebuildQuickAddLink();
                }
            },
            cancel: function() {
                if (quickAddLink) {
                    if (quickAddLink.el) {
                        quickAddLink.el.remove();
                    }
                    quickAddLink = null;
                }
                quickAddActive = false;
                if (ghostNode) {
                    ghostNode.remove();
                }
                resetMouseVars();
                updateSelection();
                hideDragLines();
                redraw();
            },
            add: function(type,keepAdding) {
                var result = addNode(type);
                if (!result) {
                    return;
                }
                if (keepAdding) {
                    mouse_mode = RED.state.QUICK_JOINING;
                }

                var nn = result.node;
                var historyEvent = result.historyEvent;
                nn.x = point[0];
                nn.y = point[1];
                var showLabel = RED.utils.getMessageProperty(RED.settings.get('editor'),"view.view-node-show-label");
                if (showLabel !== undefined && !/^link (in|out)$/.test(nn._def.type) && !nn._def.defaults.hasOwnProperty("l")) {
                    nn.l = showLabel;
                }
                if (quickAddLink) {
                    var drag_line = quickAddLink;
                    var src = null,dst,src_port;
                    if (drag_line.portType === PORT_TYPE_OUTPUT && (nn.inputs > 0 || drag_line.virtualLink) ) {
                        src = drag_line.node;
                        src_port = drag_line.port;
                        dst = nn;
                    } else if (drag_line.portType === PORT_TYPE_INPUT && (nn.outputs > 0 || drag_line.virtualLink)) {
                        src = nn;
                        dst = drag_line.node;
                        src_port = 0;
                    }

                    if (src !== null) {
                        // Joining link nodes via virual wires. Need to update
                        // the src and dst links property
                        if (drag_line.virtualLink) {
                            historyEvent = {
                                t:'multi',
                                events: [historyEvent]
                            }
                            var oldSrcLinks = $.extend(true,{},{v:src.links}).v
                            var oldDstLinks = $.extend(true,{},{v:dst.links}).v
                            src.links.push(dst.id);
                            dst.links.push(src.id);
                            src.dirty = true;
                            dst.dirty = true;

                            historyEvent.events.push({
                                t:'edit',
                                node: src,
                                dirty: RED.nodes.dirty(),
                                changed: src.changed,
                                changes: {
                                    links:oldSrcLinks
                                }
                            });
                            historyEvent.events.push({
                                t:'edit',
                                node: dst,
                                dirty: RED.nodes.dirty(),
                                changed: dst.changed,
                                changes: {
                                    links:oldDstLinks
                                }
                            });
                            src.changed = true;
                            dst.changed = true;
                        } else {
                            var link = {source: src, sourcePort:src_port, target: dst};
                            RED.nodes.addLink(link);
                            historyEvent.links = [link];
                        }
                        if (!keepAdding) {
                            quickAddLink.el.remove();
                            quickAddLink = null;
                            if (mouse_mode === RED.state.QUICK_JOINING) {
                                if (drag_line.portType === PORT_TYPE_OUTPUT && nn.outputs > 0) {
                                    showDragLines([{node:nn,port:0,portType:PORT_TYPE_OUTPUT}]);
                                } else if (!quickAddLink && drag_line.portType === PORT_TYPE_INPUT && nn.inputs > 0) {
                                    showDragLines([{node:nn,port:0,portType:PORT_TYPE_INPUT}]);
                                } else {
                                    resetMouseVars();
                                }
                            }
                        } else {
                            quickAddLink.node = nn;
                            quickAddLink.port = 0;
                        }
                    } else {
                        hideDragLines();
                        resetMouseVars();
                    }
                } else {
                    if (!keepAdding) {
                        if (mouse_mode === RED.state.QUICK_JOINING) {
                            if (nn.outputs > 0) {
                                showDragLines([{node:nn,port:0,portType:PORT_TYPE_OUTPUT}]);
                            } else if (nn.inputs > 0) {
                                showDragLines([{node:nn,port:0,portType:PORT_TYPE_INPUT}]);
                            } else {
                                resetMouseVars();
                            }
                        }
                    } else {
                        if (nn.outputs > 0) {
                            quickAddLink = {
                                node: nn,
                                port: 0,
                                portType: PORT_TYPE_OUTPUT
                            }
                        } else if (nn.inputs > 0) {
                            quickAddLink = {
                                node: nn,
                                port: 0,
                                portType: PORT_TYPE_INPUT
                            }
                        } else {
                            resetMouseVars();
                        }
                    }
                }
                if (targetGroup) {
                    RED.group.addToGroup(targetGroup, nn);

                }

                if (spliceLink) {
                    resetMouseVars();
                    // TODO: DRY - droppable/nodeMouseDown/canvasMouseUp/showQuickAddDialog
                    RED.nodes.removeLink(spliceLink);
                    var link1 = {
                        source:spliceLink.source,
                        sourcePort:spliceLink.sourcePort,
                        target: nn
                    };
                    var link2 = {
                        source:nn,
                        sourcePort:0,
                        target: spliceLink.target
                    };
                    RED.nodes.addLink(link1);
                    RED.nodes.addLink(link2);
                    historyEvent.links = (historyEvent.links || []).concat([link1,link2]);
                    historyEvent.removedLinks = [spliceLink];
                }
                RED.history.push(historyEvent);
                RED.nodes.add(nn);
                RED.editor.validateNode(nn);
                RED.nodes.dirty(true);
                // auto select dropped node - so info shows (if visible)
                clearSelection();
                nn.selected = true;
                if (targetGroup) {
                    selectGroup(targetGroup,false);
                    targetGroup.active = true
                    targetGroup.dirty = true;
                    activeGroup = targetGroup;
                }
                moving_set.push({n:nn});
                updateActiveNodes();
                updateSelection();
                redraw();
                // At this point the newly added node will have a real width,
                // so check if the position needs nudging
                if (lastAddedX !== undefined) {
                    var lastNodeRHEdge = lastAddedX + lastAddedWidth/2;
                    var thisNodeLHEdge = nn.x - nn.w/2;
                    var gap = thisNodeLHEdge - lastNodeRHEdge;
                    if (gap != gridSize *2) {
                        nn.x = nn.x + gridSize * 2 - gap;
                        nn.dirty = true;
                        nn.x = Math.ceil(nn.x / gridSize) * gridSize;
                        redraw();
                    }
                }
                if (keepAdding) {
                    if (lastAddedX === undefined) {
                        // ghostLink.attr("opacity",1);
                        setTimeout(function() {
                            RED.typeSearch.refresh({filter:{input:true}});
                        },100);
                    }

                    lastAddedX = nn.x;
                    lastAddedWidth = nn.w;

                    point[0] = nn.x + nn.w/2 + node_width/2 + gridSize * 2;
                    ghostNode.attr('transform','translate('+(point[0] - node_width/2)+','+(point[1] - node_height/2)+')');
                    rebuildQuickAddLink();
                } else {
                    quickAddActive = false;
                    ghostNode.remove();
                }
            }
        });

        updateActiveNodes();
        updateSelection();
        redraw();
    }

    function canvasMouseMove() {
        var i;
        var node;
        // Prevent touch scrolling...
        //if (d3.touches(this)[0]) {
        //    d3.event.preventDefault();
        //}

        // TODO: auto scroll the container
        //var point = d3.mouse(this);
        //if (point[0]-container.scrollLeft < 30 && container.scrollLeft > 0) { container.scrollLeft -= 15; }
        //console.log(d3.mouse(this),container.offsetWidth,container.offsetHeight,container.scrollLeft,container.scrollTop);

        if (mouse_mode === RED.state.PANNING) {

            var pos = [d3.event.pageX,d3.event.pageY];
            var deltaPos = [
                mouse_position[0]-pos[0],
                mouse_position[1]-pos[1]
            ];

            chart.scrollLeft(scroll_position[0]+deltaPos[0])
            chart.scrollTop(scroll_position[1]+deltaPos[1])
            return
        }

        mouse_position = d3.touches(this)[0]||d3.mouse(this);

        if (lasso) {
            var ox = parseInt(lasso.attr("ox"));
            var oy = parseInt(lasso.attr("oy"));
            var x = parseInt(lasso.attr("x"));
            var y = parseInt(lasso.attr("y"));
            var w;
            var h;
            if (mouse_position[0] < ox) {
                x = mouse_position[0];
                w = ox-x;
            } else {
                w = mouse_position[0]-x;
            }
            if (mouse_position[1] < oy) {
                y = mouse_position[1];
                h = oy-y;
            } else {
                h = mouse_position[1]-y;
            }
            lasso
                .attr("x",x)
                .attr("y",y)
                .attr("width",w)
                .attr("height",h)
            ;
            return;
        }

        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }

        if (mouse_mode != RED.state.QUICK_JOINING && mouse_mode != RED.state.IMPORT_DRAGGING && !mousedown_node && !mousedown_group && selected_link == null) {
            return;
        }

        var mousePos;
        // if (mouse_mode === RED.state.GROUP_RESIZE) {
        //     mousePos = mouse_position;
        //     var nx = mousePos[0] + mousedown_group.dx;
        //     var ny = mousePos[1] + mousedown_group.dy;
        //     switch(mousedown_group.activeHandle) {
        //         case 0: mousedown_group.pos.x0 = nx; mousedown_group.pos.y0 = ny; break;
        //         case 1: mousedown_group.pos.x1 = nx; mousedown_group.pos.y0 = ny; break;
        //         case 2: mousedown_group.pos.x1 = nx; mousedown_group.pos.y1 = ny; break;
        //         case 3: mousedown_group.pos.x0 = nx; mousedown_group.pos.y1 = ny; break;
        //     }
        //     mousedown_group.dirty = true;
        // }
        if (mouse_mode == RED.state.JOINING || mouse_mode === RED.state.QUICK_JOINING) {
            // update drag line
            if (drag_lines.length === 0 && mousedown_port_type !== null) {
                if (d3.event.shiftKey) {
                    // Get all the wires we need to detach.
                    var links = [];
                    var existingLinks = [];
                    if (selected_link &&
                        ((mousedown_port_type === PORT_TYPE_OUTPUT &&
                            selected_link.source === mousedown_node &&
                            selected_link.sourcePort === mousedown_port_index
                        ) ||
                        (mousedown_port_type === PORT_TYPE_INPUT &&
                            selected_link.target === mousedown_node
                        ))
                    ) {
                        existingLinks = [selected_link];
                    } else {
                        var filter;
                        if (mousedown_port_type === PORT_TYPE_OUTPUT) {
                            filter = {
                                source:mousedown_node,
                                sourcePort: mousedown_port_index
                            }
                        } else {
                            filter = {
                                target: mousedown_node
                            }
                        }
                        existingLinks = RED.nodes.filterLinks(filter);
                    }
                    for (i=0;i<existingLinks.length;i++) {
                        var link = existingLinks[i];
                        RED.nodes.removeLink(link);
                        links.push({
                            link:link,
                            node: (mousedown_port_type===PORT_TYPE_OUTPUT)?link.target:link.source,
                            port: (mousedown_port_type===PORT_TYPE_OUTPUT)?0:link.sourcePort,
                            portType: (mousedown_port_type===PORT_TYPE_OUTPUT)?PORT_TYPE_INPUT:PORT_TYPE_OUTPUT
                        })
                    }
                    if (links.length === 0) {
                        resetMouseVars();
                        redraw();
                    } else {
                        showDragLines(links);
                        mouse_mode = 0;
                        updateActiveNodes();
                        redraw();
                        mouse_mode = RED.state.JOINING;
                    }
                } else if (mousedown_node && !quickAddLink) {
                    showDragLines([{node:mousedown_node,port:mousedown_port_index,portType:mousedown_port_type}]);
                }
                selected_link = null;
            }
            mousePos = mouse_position;
            for (i=0;i<drag_lines.length;i++) {
                var drag_line = drag_lines[i];
                var numOutputs = (drag_line.portType === PORT_TYPE_OUTPUT)?(drag_line.node.outputs || 1):1;
                var sourcePort = drag_line.port;
                var portY = -((numOutputs-1)/2)*13 +13*sourcePort;

                var sc = (drag_line.portType === PORT_TYPE_OUTPUT)?1:-1;
                drag_line.el.attr("d",generateLinkPath(drag_line.node.x+sc*drag_line.node.w/2,drag_line.node.y+portY,mousePos[0],mousePos[1],sc));
            }
            d3.event.preventDefault();
        } else if (mouse_mode == RED.state.MOVING) {
            mousePos = d3.mouse(document.body);
            if (isNaN(mousePos[0])) {
                mousePos = d3.touches(document.body)[0];
            }
            var d = (mouse_offset[0]-mousePos[0])*(mouse_offset[0]-mousePos[0]) + (mouse_offset[1]-mousePos[1])*(mouse_offset[1]-mousePos[1]);
            if (d > 3) {
                mouse_mode = RED.state.MOVING_ACTIVE;
                clickElapsed = 0;
                spliceActive = false;
                if (moving_set.length === 1) {
                    node = moving_set[0];
                    spliceActive = node.n.hasOwnProperty("_def") &&
                                   ((node.n.hasOwnProperty("inputs") && node.n.inputs > 0) || (!node.n.hasOwnProperty("inputs") && node.n._def.inputs > 0)) &&
                                   ((node.n.hasOwnProperty("outputs") && node.n.outputs > 0) || (!node.n.hasOwnProperty("outputs") && node.n._def.outputs > 0)) &&
                                   RED.nodes.filterLinks({ source: node.n }).length === 0 &&
                                   RED.nodes.filterLinks({ target: node.n }).length === 0;
                }
            }
        } else if (mouse_mode == RED.state.MOVING_ACTIVE || mouse_mode == RED.state.IMPORT_DRAGGING) {
            mousePos = mouse_position;
            var minX = 0;
            var minY = 0;
            var maxX = space_width;
            var maxY = space_height;
            for (var n = 0; n<moving_set.length; n++) {
                node = moving_set[n];
                if (d3.event.shiftKey) {
                    node.n.ox = node.n.x;
                    node.n.oy = node.n.y;
                }
                node.n.x = mousePos[0]+node.dx;
                node.n.y = mousePos[1]+node.dy;
                node.n.dirty = true;
                minX = Math.min(node.n.x-node.n.w/2-5,minX);
                minY = Math.min(node.n.y-node.n.h/2-5,minY);
                maxX = Math.max(node.n.x+node.n.w/2+5,maxX);
                maxY = Math.max(node.n.y+node.n.h/2+5,maxY);
            }
            if (minX !== 0 || minY !== 0) {
                for (i = 0; i<moving_set.length; i++) {
                    node = moving_set[i];
                    node.n.x -= minX;
                    node.n.y -= minY;
                }
            }
            if (maxX !== space_width || maxY !== space_height) {
                for (i = 0; i<moving_set.length; i++) {
                    node = moving_set[i];
                    node.n.x -= (maxX - space_width);
                    node.n.y -= (maxY - space_height);
                }
            }
            // if (mousedown_group) {
            //     mousedown_group.x = mousePos[0] + mousedown_group.dx;
            //     mousedown_group.y = mousePos[1] + mousedown_group.dy;
            //     mousedown_group.dirty = true;
            // }
            if (snapGrid != d3.event.shiftKey && moving_set.length > 0) {
                var gridOffset = [0,0];
                node = moving_set[0];
                gridOffset[0] = node.n.x-(gridSize*Math.floor((node.n.x-node.n.w/2)/gridSize)+node.n.w/2);
                gridOffset[1] = node.n.y-(gridSize*Math.floor(node.n.y/gridSize));
                if (gridOffset[0] !== 0 || gridOffset[1] !== 0) {
                    for (i = 0; i<moving_set.length; i++) {
                        node = moving_set[i];
                        node.n.x -= gridOffset[0];
                        node.n.y -= gridOffset[1];
                        if (node.n.x == node.n.ox && node.n.y == node.n.oy) {
                            node.dirty = false;
                        }
                    }
                }
            }
            if ((mouse_mode == RED.state.MOVING_ACTIVE || mouse_mode == RED.state.IMPORT_DRAGGING) && moving_set.length === 1) {
                node = moving_set[0];
                if (spliceActive) {
                    if (!spliceTimer) {
                        spliceTimer = setTimeout(function() {
                            var nodes = [];
                            var bestDistance = Infinity;
                            var bestLink = null;
                            var mouseX = node.n.x;
                            var mouseY = node.n.y;
                            if (outer[0][0].getIntersectionList) {
                                var svgRect = outer[0][0].createSVGRect();
                                svgRect.x = mouseX;
                                svgRect.y = mouseY;
                                svgRect.width = 1;
                                svgRect.height = 1;
                                nodes = outer[0][0].getIntersectionList(svgRect, outer[0][0]);
                            } else {
                                // Firefox doesn"t do getIntersectionList and that
                                // makes us sad
                                nodes = RED.view.getLinksAtPoint(mouseX,mouseY);
                            }
                            for (var i=0;i<nodes.length;i++) {
                                if (d3.select(nodes[i]).classed("red-ui-flow-link-background")) {
                                    var length = nodes[i].getTotalLength();
                                    for (var j=0;j<length;j+=10) {
                                        var p = nodes[i].getPointAtLength(j);
                                        var d2 = ((p.x-mouseX)*(p.x-mouseX))+((p.y-mouseY)*(p.y-mouseY));
                                        if (d2 < 200 && d2 < bestDistance) {
                                            bestDistance = d2;
                                            bestLink = nodes[i];
                                        }
                                    }
                                }
                            }
                            if (activeSpliceLink && activeSpliceLink !== bestLink) {
                                d3.select(activeSpliceLink.parentNode).classed("red-ui-flow-link-splice",false);
                            }
                            if (bestLink) {
                                d3.select(bestLink.parentNode).classed("red-ui-flow-link-splice",true)
                            } else {
                                d3.select(".red-ui-flow-link-splice").classed("red-ui-flow-link-splice",false);
                            }
                            activeSpliceLink = bestLink;
                            spliceTimer = null;
                        },100);
                    }
                }
                if (!node.n.g && activeGroups) {
                    if (!groupHoverTimer) {
                        groupHoverTimer = setTimeout(function() {
                            activeHoverGroup = getGroupAt(node.n.x,node.n.y);
                            for (var i=0;i<activeGroups.length;i++) {
                                var g = activeGroups[i];
                                if (g === activeHoverGroup) {
                                    g.hovered = true;
                                    g.dirty = true;
                                } else if (g.hovered) {
                                    g.hovered = false;
                                    g.dirty = true;
                                }
                            }
                            groupHoverTimer = null;
                        },50);
                    }
                }
            }


        }
        if (mouse_mode !== 0) {
            redraw();
        }
    }

    function canvasMouseUp() {
if (DEBUG_EVENTS) { console.warn("canvasMouseUp", mouse_mode); }
        var i;
        var historyEvent;
        if (mouse_mode === RED.state.PANNING) {
            resetMouseVars();
            return
        }
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        if (mouse_mode === RED.state.QUICK_JOINING) {
            return;
        }
        if (mousedown_node && mouse_mode == RED.state.JOINING) {
            var removedLinks = [];
            for (i=0;i<drag_lines.length;i++) {
                if (drag_lines[i].link) {
                    removedLinks.push(drag_lines[i].link)
                }
            }
            if (removedLinks.length > 0) {
                historyEvent = {
                    t:"delete",
                    links: removedLinks,
                    dirty:RED.nodes.dirty()
                };
                RED.history.push(historyEvent);
                RED.nodes.dirty(true);
            }
            hideDragLines();
        }
        if (lasso) {
            var x = parseInt(lasso.attr("x"));
            var y = parseInt(lasso.attr("y"));
            var x2 = x+parseInt(lasso.attr("width"));
            var y2 = y+parseInt(lasso.attr("height"));
            if (!d3.event.shiftKey) {
                clearSelection();
            }
            activeNodes.forEach(function(n) {
                if (n.z == RED.workspaces.active() && !n.selected) {
                    if (n.x > x && n.x < x2 && n.y > y && n.y < y2) {
                        if (n.g) {
                            var group = RED.nodes.group(n.g);
                            if (!group.selected) {
                                selectGroup(RED.nodes.group(n.g),true);
                            }
                        } else {
                            n.selected = true;
                            n.dirty = true;
                            moving_set.push({n:n});
                        }
                    }
                }
            });
            if (activeSubflow) {
                activeSubflow.in.forEach(function(n) {
                    n.selected = (n.x > x && n.x < x2 && n.y > y && n.y < y2);
                    if (n.selected) {
                        n.dirty = true;
                        moving_set.push({n:n});
                    }
                });
                activeSubflow.out.forEach(function(n) {
                    n.selected = (n.x > x && n.x < x2 && n.y > y && n.y < y2);
                    if (n.selected) {
                        n.dirty = true;
                        moving_set.push({n:n});
                    }
                });
                if (activeSubflow.status) {
                    activeSubflow.status.selected = (activeSubflow.status.x > x && activeSubflow.status.x < x2 && activeSubflow.status.y > y && activeSubflow.status.y < y2);
                    if (activeSubflow.status.selected) {
                        activeSubflow.status.dirty = true;
                        moving_set.push({n:activeSubflow.status});
                    }
                }
            }
            updateSelection();
            lasso.remove();
            lasso = null;
        } else if (mouse_mode == RED.state.DEFAULT && mousedown_link == null && !d3.event.ctrlKey && !d3.event.metaKey ) {
            clearSelection();
            updateSelection();
        }
        if (mouse_mode == RED.state.MOVING_ACTIVE) {
            if (moving_set.length > 0) {
                if (activeHoverGroup) {
                    for (var j=0;j<moving_set.length;j++) {
                        var n = moving_set[j];
                        RED.group.addToGroup(activeHoverGroup,n.n);
                    }
                    activeHoverGroup.hovered = false;
                    activeHoverGroup.dirty = true;
                    activeHoverGroup.active = true;
                    activeGroup = activeHoverGroup;
                    activeGroup.selected = true;

                    activeHoverGroup = null;
                }

                var ns = [];
                for (var j=0;j<moving_set.length;j++) {
                    var n = moving_set[j];
                    if (n.ox !== n.n.x || n.oy !== n.n.y) {
                        ns.push({n:n.n,ox:n.ox,oy:n.oy,moved:n.n.moved});
                        n.n.dirty = true;
                        n.n.moved = true;
                    }
                }
                if (ns.length > 0) {
                    historyEvent = {t:"move",nodes:ns,dirty:RED.nodes.dirty()};
                    if (activeSpliceLink) {
                        // TODO: DRY - droppable/nodeMouseDown/canvasMouseUp
                        var spliceLink = d3.select(activeSpliceLink).data()[0];
                        RED.nodes.removeLink(spliceLink);
                        var link1 = {
                            source:spliceLink.source,
                            sourcePort:spliceLink.sourcePort,
                            target: moving_set[0].n
                        };
                        var link2 = {
                            source:moving_set[0].n,
                            sourcePort:0,
                            target: spliceLink.target
                        };
                        RED.nodes.addLink(link1);
                        RED.nodes.addLink(link2);
                        historyEvent.links = [link1,link2];
                        historyEvent.removedLinks = [spliceLink];
                        updateActiveNodes();
                    }
                    RED.nodes.dirty(true);
                    RED.history.push(historyEvent);
                }
            }
        }
        // if (mouse_mode === RED.state.MOVING && mousedown_node && mousedown_node.g) {
        //     if (mousedown_node.gSelected) {
        //         delete mousedown_node.gSelected
        //     } else {
        //         if (!d3.event.ctrlKey && !d3.event.metaKey) {
        //             clearSelection();
        //         }
        //         RED.nodes.group(mousedown_node.g).selected = true;
        //         mousedown_node.selected = true;
        //         mousedown_node.dirty = true;
        //         moving_set.push({n:mousedown_node});
        //     }
        // }
        if (mouse_mode == RED.state.MOVING || mouse_mode == RED.state.MOVING_ACTIVE) {
            // if (mousedown_node) {
            //     delete mousedown_node.gSelected;
            // }
            for (i=0;i<moving_set.length;i++) {
                delete moving_set[i].ox;
                delete moving_set[i].oy;
            }
        }
        if (mouse_mode == RED.state.IMPORT_DRAGGING) {
            RED.keyboard.remove("escape");
            updateActiveNodes();
            RED.nodes.dirty(true);
        }
        resetMouseVars();
        redraw();
    }

    function zoomIn() {
        if (scaleFactor < 2) {
            zoomView(scaleFactor+0.1);
        }
    }
    function zoomOut() {
        if (scaleFactor > 0.3) {
            zoomView(scaleFactor-0.1);
        }
    }
    function zoomZero() { zoomView(1); }

    function zoomView(factor) {
        var screenSize = [chart.width(),chart.height()];
        var scrollPos = [chart.scrollLeft(),chart.scrollTop()];
        var center = [(scrollPos[0] + screenSize[0]/2)/scaleFactor,(scrollPos[1] + screenSize[1]/2)/scaleFactor];
        scaleFactor = factor;
        var newCenter = [(scrollPos[0] + screenSize[0]/2)/scaleFactor,(scrollPos[1] + screenSize[1]/2)/scaleFactor];
        var delta = [(newCenter[0]-center[0])*scaleFactor,(newCenter[1]-center[1])*scaleFactor]
        chart.scrollLeft(scrollPos[0]-delta[0]);
        chart.scrollTop(scrollPos[1]-delta[1]);

        RED.view.navigator.resize();
        redraw();
    }


    function selectAll() {
        if (mouse_mode === RED.state.SELECTING_NODE && selectNodesOptions.single) {
            return;
        }

        activeGroups.forEach(function(g) {
            selectGroup(g, true);
            if (!g.selected) {
                g.selected = true;
                g.dirty = true;
            }
        })

        activeNodes.forEach(function(n) {
            if (mouse_mode === RED.state.SELECTING_NODE) {
                if (selectNodesOptions.filter && !selectNodesOptions.filter(n)) {
                    return;
                }
            }
            if (!n.g && !n.selected) {
                n.selected = true;
                n.dirty = true;
                moving_set.push({n:n});
            }
        });

        if (mouse_mode !== RED.state.SELECTING_NODE && activeSubflow) {
            activeSubflow.in.forEach(function(n) {
                if (!n.selected) {
                    n.selected = true;
                    n.dirty = true;
                    moving_set.push({n:n});
                }
            });
            activeSubflow.out.forEach(function(n) {
                if (!n.selected) {
                    n.selected = true;
                    n.dirty = true;
                    moving_set.push({n:n});
                }
            });
            if (activeSubflow.status) {
                if (!activeSubflow.status.selected) {
                    activeSubflow.status.selected = true;
                    activeSubflow.status.dirty = true;
                    moving_set.push({n:activeSubflow.status});
                }
            }
        }

        selected_link = null;
        if (mouse_mode !== RED.state.SELECTING_NODE) {
            updateSelection();
        }
        redraw();
    }

    function clearSelection() {
if (DEBUG_EVENTS) { console.warn("clearSelection", mouse_mode); }
        for (var i=0;i<moving_set.length;i++) {
            var n = moving_set[i];
            n.n.dirty = true;
            n.n.selected = false;
        }
        moving_set = [];
        selected_link = null;
        if (activeGroup) {
            activeGroup.active = false
            activeGroup.dirty = true;
            activeGroup = null;
        }
        activeGroups.forEach(function(g) {
            g.selected = false;
            g.dirty = true;
        })
    }

    var lastSelection = null;
    function updateSelection() {
        var selection = {};
        var activeWorkspace = RED.workspaces.active();

        var workspaceSelection = RED.workspaces.selection();
        if (workspaceSelection.length === 0) {
            if (moving_set.length > 0) {
                selection.nodes = moving_set.map(function(n) { return n.n;});
            }
            if (selected_link != null) {
                selection.link = selected_link;
            }
            selection.groups = activeGroups.filter(function(g) { return g.selected })
            activeLinks = RED.nodes.filterLinks({
                source:{z:activeWorkspace},
                target:{z:activeWorkspace}
            });
            var tabOrder = RED.nodes.getWorkspaceOrder();
            var currentLinks = activeLinks;
            var addedLinkLinks = {};
            activeFlowLinks = [];
            var activeLinkNodeIds = Object.keys(activeLinkNodes);
            activeLinkNodeIds.forEach(function(n) {
                activeLinkNodes[n].dirty = true;
            })
            activeLinkNodes = {};
            for (var i=0;i<moving_set.length;i++) {
                if (moving_set[i].n.type === "link out" || moving_set[i].n.type === "link in") {
                    var linkNode = moving_set[i].n;
                    activeLinkNodes[linkNode.id] = linkNode;
                    var offFlowLinks = {};
                    linkNode.links.forEach(function(id) {
                        var target = RED.nodes.node(id);
                        if (target) {
                            if (linkNode.type === "link out") {
                                if (target.z === linkNode.z) {
                                    if (!addedLinkLinks[linkNode.id+":"+target.id]) {
                                        activeLinks.push({
                                            source:linkNode,
                                            sourcePort:0,
                                            target: target,
                                            link: true
                                        });
                                        addedLinkLinks[linkNode.id+":"+target.id] = true;
                                        activeLinkNodes[target.id] = target;
                                        target.dirty = true;

                                    }
                                } else {
                                    offFlowLinks[target.z] = offFlowLinks[target.z]||[];
                                    offFlowLinks[target.z].push(target);
                                }
                            } else {
                                if (target.z === linkNode.z) {
                                    if (!addedLinkLinks[target.id+":"+linkNode.id]) {
                                        activeLinks.push({
                                            source:target,
                                            sourcePort:0,
                                            target: linkNode,
                                            link: true
                                        });
                                        addedLinkLinks[target.id+":"+linkNode.id] = true;
                                        activeLinkNodes[target.id] = target;
                                        target.dirty = true;
                                    }
                                } else {
                                    offFlowLinks[target.z] = offFlowLinks[target.z]||[];
                                    offFlowLinks[target.z].push(target);
                                }
                            }
                        }
                    });
                    var offFlows = Object.keys(offFlowLinks);
                    // offFlows.sort(function(A,B) {
                    //     return tabOrder.indexOf(A) - tabOrder.indexOf(B);
                    // });
                    if (offFlows.length > 0) {
                        activeFlowLinks.push({
                            refresh: Math.floor(Math.random()*10000),
                            node: linkNode,
                            links: offFlowLinks//offFlows.map(function(i) { return {id:i,links:offFlowLinks[i]};})
                        });
                    }
                }
            }
            if (activeFlowLinks.length === 0 && selected_link !== null && selected_link.link) {
                activeLinks.push(selected_link);
                activeLinkNodes[selected_link.source.id] = selected_link.source;
                selected_link.source.dirty = true;
                activeLinkNodes[selected_link.target.id] = selected_link.target;
                selected_link.target.dirty = true;
            }
        } else {
            selection.flows = workspaceSelection;
        }
        var selectionJSON = activeWorkspace+":"+JSON.stringify(selection,function(key,value) {
            if (key === 'nodes' || key === 'flows' || key === 'groups') {
                return value.map(function(n) { return n.id })
            } else if (key === 'link') {
                return value.source.id+":"+value.sourcePort+":"+value.target.id;
            }
            return value;
        });
        if (selectionJSON !== lastSelection) {
            lastSelection = selectionJSON;
            RED.events.emit("view:selection-changed",selection);
        }
    }

    function editSelection() {
        if (moving_set.length > 0) {
            var node = moving_set[0].n;
            if (node.type === "subflow") {
                RED.editor.editSubflow(activeSubflow);
            } else {
                RED.editor.edit(node);
            }
        }
    }
    function deleteSelection() {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            return;
        }
        if (portLabelHover) {
            portLabelHover.remove();
            portLabelHover = null;
        }
        var workspaceSelection = RED.workspaces.selection();
        if (workspaceSelection.length > 0) {
            var workspaceCount = 0;
            workspaceSelection.forEach(function(ws) { if (ws.type === 'tab') { workspaceCount++ } });
            if (workspaceCount === RED.workspaces.count()) {
                // Cannot delete all workspaces
                return;
            }
            var historyEvent = {
                t: 'delete',
                dirty: RED.nodes.dirty(),
                nodes: [],
                links: [],
                workspaces: [],
                subflows: []
            }
            var workspaceOrder = RED.nodes.getWorkspaceOrder().slice(0);

            for (var i=0;i<workspaceSelection.length;i++) {
                var ws = workspaceSelection[i];
                ws._index = workspaceOrder.indexOf(ws.id);
                RED.workspaces.remove(ws);
                var subEvent;
                if (ws.type === 'tab') {
                    historyEvent.workspaces.push(ws);
                    subEvent = RED.nodes.removeWorkspace(ws.id);
                } else {
                    subEvent = RED.subflow.removeSubflow(ws.id);
                    historyEvent.subflows = historyEvent.subflows.concat(subEvent.subflows);
                }
                historyEvent.nodes = historyEvent.nodes.concat(subEvent.nodes);
                historyEvent.links = historyEvent.links.concat(subEvent.links);
            }
            RED.history.push(historyEvent);
            RED.nodes.dirty(true);
            updateActiveNodes();
            updateSelection();
            redraw();
        } else if (moving_set.length > 0 || selected_link != null) {
            var result;
            var removedNodes = [];
            var removedLinks = [];
            var removedSubflowOutputs = [];
            var removedSubflowInputs = [];
            var removedSubflowStatus;
            var subflowInstances = [];

            var startDirty = RED.nodes.dirty();
            var startChanged = false;
            if (moving_set.length > 0) {
                for (var i=0;i<moving_set.length;i++) {
                    var node = moving_set[i].n;
                    node.selected = false;
                    if (node.type != "subflow") {
                        if (node.x < 0) {
                            node.x = 25
                        }
                        var removedEntities = RED.nodes.remove(node.id);
                        removedNodes.push(node);
                        removedNodes = removedNodes.concat(removedEntities.nodes);
                        removedLinks = removedLinks.concat(removedEntities.links);
                    } else {
                        if (node.direction === "out") {
                            removedSubflowOutputs.push(node);
                        } else if (node.direction === "in") {
                            removedSubflowInputs.push(node);
                        } else if (node.direction === "status") {
                            removedSubflowStatus = node;
                        }
                        node.dirty = true;
                    }
                }
                if (removedSubflowOutputs.length > 0) {
                    result = RED.subflow.removeOutput(removedSubflowOutputs);
                    if (result) {
                        removedLinks = removedLinks.concat(result.links);
                    }
                }
                // Assume 0/1 inputs
                if (removedSubflowInputs.length == 1) {
                    result = RED.subflow.removeInput();
                    if (result) {
                        removedLinks = removedLinks.concat(result.links);
                    }
                }
                if (removedSubflowStatus) {
                    result = RED.subflow.removeStatus();
                    if (result) {
                        removedLinks = removedLinks.concat(result.links);
                    }
                }

                var instances = RED.subflow.refresh(true);
                if (instances) {
                    subflowInstances = instances.instances;
                }
                moving_set = [];
                if (removedNodes.length > 0 || removedSubflowOutputs.length > 0 || removedSubflowInputs.length > 0 || removedSubflowStatus) {
                    RED.nodes.dirty(true);
                }
            }
            var historyEvent;

            if (selected_link && selected_link.link) {
                var sourceId = selected_link.source.id;
                var targetId = selected_link.target.id;
                var sourceIdIndex = selected_link.target.links.indexOf(sourceId);
                var targetIdIndex = selected_link.source.links.indexOf(targetId);

                historyEvent = {
                    t:"multi",
                    events: [
                        {
                            t: "edit",
                            node: selected_link.source,
                            changed: selected_link.source.changed,
                            changes: {
                                links: $.extend(true,{},{v:selected_link.source.links}).v
                            }
                        },
                        {
                            t: "edit",
                            node: selected_link.target,
                            changed: selected_link.target.changed,
                            changes: {
                                links: $.extend(true,{},{v:selected_link.target.links}).v
                            }
                        }

                    ],
                    dirty:RED.nodes.dirty()
                }
                RED.nodes.dirty(true);
                selected_link.source.changed = true;
                selected_link.target.changed = true;
                selected_link.target.links.splice(sourceIdIndex,1);
                selected_link.source.links.splice(targetIdIndex,1);
                selected_link.source.dirty = true;
                selected_link.target.dirty = true;

            } else {
                if (selected_link) {
                    RED.nodes.removeLink(selected_link);
                    removedLinks.push(selected_link);
                }
                RED.nodes.dirty(true);
                historyEvent = {
                    t:"delete",
                    nodes:removedNodes,
                    links:removedLinks,
                    subflowOutputs:removedSubflowOutputs,
                    subflowInputs:removedSubflowInputs,
                    subflow: {
                        id: activeSubflow?activeSubflow.id:undefined,
                        instances: subflowInstances
                    },
                    dirty:startDirty
                };
                if (removedSubflowStatus) {
                    historyEvent.subflow.status = removedSubflowStatus;
                }
            }
            RED.history.push(historyEvent);

            selected_link = null;
            updateActiveNodes();
            updateSelection();
            redraw();
        }
    }

    function copySelection() {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            return;
        }
        var nodes = [];
        var selection = RED.workspaces.selection();
        if (selection.length > 0) {
            nodes = [];
            selection.forEach(function(n) {
                if (n.type === 'tab') {
                    nodes.push(n);
                    nodes = nodes.concat(RED.nodes.filterNodes({z:n.id}));
                }
            });
        } else if (moving_set.length > 0) {
            nodes = moving_set.map(function(n) { return n.n });
        }

        if (nodes.length > 0) {
            var nns = [];
            for (var n=0;n<nodes.length;n++) {
                var node = nodes[n];
                // The only time a node.type == subflow can be selected is the
                // input/output "proxy" nodes. They cannot be copied.
                if (node.type != "subflow") {
                    for (var d in node._def.defaults) {
                        if (node._def.defaults.hasOwnProperty(d)) {
                            if (node._def.defaults[d].type) {
                                var configNode = RED.nodes.node(node[d]);
                                if (configNode && configNode._def.exclusive) {
                                    nns.push(RED.nodes.convertNode(configNode));
                                }
                            }
                        }
                    }
                    nns.push(RED.nodes.convertNode(node));
                    //TODO: if the node has an exclusive config node, it should also be copied, to ensure it remains exclusive...
                }
            }
            clipboard = JSON.stringify(nns);
            RED.notify(RED._("clipboard.nodeCopied",{count:nns.length}),{id:"clipboard"});
        }
    }

    function calculateTextWidth(str, className, offset) {
        var result=convertLineBreakCharacter(str);
        var width = 0;
        for (var i=0;i<result.length;i++) {
            var calculateTextW=calculateTextDimensions(result[i],className,offset,0)[0];
            if (width<calculateTextW) {
                width=calculateTextW;
            }
        }
        return width;
    }

    var textDimensionPlaceholder = {};
    function calculateTextDimensions(str,className,offsetW,offsetH) {
        if (!textDimensionPlaceholder[className]) {
            textDimensionPlaceholder[className] = document.createElement("span");
            textDimensionPlaceholder[className].className = className;
            textDimensionPlaceholder[className].style.position = "absolute";
            textDimensionPlaceholder[className].style.top = "-1000px";
            document.getElementById("red-ui-editor").appendChild(textDimensionPlaceholder[className]);
        }
        textDimensionPlaceholder[className].textContent = (str||"");
        var w = textDimensionPlaceholder[className].offsetWidth;
        var h = textDimensionPlaceholder[className].offsetHeight;
        return [offsetW+w,offsetH+h];
    }

    var separateTextByLineBreak = [];
    function convertLineBreakCharacter(str) {
        var result = [];
        var count = 0;
        var result_temp = '';
        for (var i = 0;i < str.length;i++) {
            if (str.charAt(i) == '\\') {
                if (str.charAt(i+1) == '\\') {
                    result_temp += str.charAt(i);
                    i++;
                } else if (str.charAt(i+1) == 'n') {
                    result.push(result_temp);
                    if (i+1 == str.length-1) {
                        result.push('');
                    }
                    result_temp = '';
                    count = i+2;
                    i++;
                } else {
                    result_temp += str.charAt(i);
                }
            } else {
                result_temp += str.charAt(i);
            }
        }
        if (count == 0 || count < str.length) {
            result.push(result_temp);
        }
        separateTextByLineBreak = result;
        return result;
    }

    function resetMouseVars() {
        mousedown_node = null;
        mousedown_group = null;
        mousedown_group_handle = null;
        mouseup_node = null;
        mousedown_link = null;
        mouse_mode = 0;
        mousedown_port_type = null;
        activeSpliceLink = null;
        spliceActive = false;
        d3.select(".red-ui-flow-link-splice").classed("red-ui-flow-link-splice",false);
        if (spliceTimer) {
            clearTimeout(spliceTimer);
            spliceTimer = null;
        }
        if (groupHoverTimer) {
            clearTimeout(groupHoverTimer);
            groupHoverTimer = null;
        }
    }

    function disableQuickJoinEventHandler(evt) {
        // Check for ctrl (all browsers), "Meta" (Chrome/FF), keyCode 91 (Safari)
        if (evt.keyCode === 17 || evt.key === "Meta" || evt.keyCode === 91) {
            resetMouseVars();
            hideDragLines();
            redraw();
            $(window).off('keyup',disableQuickJoinEventHandler);
        }
    }

    function portMouseDown(d,portType,portIndex) {
if (DEBUG_EVENTS) { console.warn("portMouseDown", mouse_mode,d); }
        //console.log(d,portType,portIndex);
        // disable zoom
        //eventLayer.call(d3.behavior.zoom().on("zoom"), null);
        if (d3.event.button === 1) {
            return;
        }
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        mousedown_node = d;
        mousedown_port_type = portType;
        mousedown_port_index = portIndex || 0;
        if (mouse_mode !== RED.state.QUICK_JOINING) {
            mouse_mode = RED.state.JOINING;
            document.body.style.cursor = "crosshair";
            if (d3.event.ctrlKey || d3.event.metaKey) {
                mouse_mode = RED.state.QUICK_JOINING;
                showDragLines([{node:mousedown_node,port:mousedown_port_index,portType:mousedown_port_type}]);
                $(window).on('keyup',disableQuickJoinEventHandler);
            }
        }
        d3.event.stopPropagation();
        d3.event.preventDefault();
    }

    function portMouseUp(d,portType,portIndex) {
if (DEBUG_EVENTS) { console.warn("portMouseUp", mouse_mode,d); }
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        var i;
        if (mouse_mode === RED.state.QUICK_JOINING && drag_lines.length > 0) {
            if (drag_lines[0].node === d) {
                // Cannot quick-join to self
                return
            }
            if (drag_lines[0].virtualLink &&
                (
                    (drag_lines[0].node.type === 'link in' && d.type !== 'link out') ||
                    (drag_lines[0].node.type === 'link out' && d.type !== 'link in')
                )
            ) {
                return
            }
        }
        document.body.style.cursor = "";
        if (mouse_mode == RED.state.JOINING || mouse_mode == RED.state.QUICK_JOINING) {
            if (typeof TouchEvent != "undefined" && d3.event instanceof TouchEvent) {
                RED.nodes.eachNode(function(n) {
                    if (n.z == RED.workspaces.active()) {
                        var hw = n.w/2;
                        var hh = n.h/2;
                        if (n.x-hw<mouse_position[0] && n.x+hw> mouse_position[0] &&
                            n.y-hh<mouse_position[1] && n.y+hh>mouse_position[1]) {
                                mouseup_node = n;
                                portType = mouseup_node.inputs>0?PORT_TYPE_INPUT:PORT_TYPE_OUTPUT;
                                portIndex = 0;
                        }
                    }
                });
            } else {
                mouseup_node = d;
            }
            var addedLinks = [];
            var removedLinks = [];
            var modifiedNodes = []; // joining link nodes

            var select_link = null;

            for (i=0;i<drag_lines.length;i++) {
                if (drag_lines[i].link) {
                    removedLinks.push(drag_lines[i].link)
                }
            }
            var linkEditEvents = [];

            for (i=0;i<drag_lines.length;i++) {
                if (portType != drag_lines[i].portType && mouseup_node !== drag_lines[i].node) {
                    var drag_line = drag_lines[i];
                    var src,dst,src_port;
                    if (drag_line.portType === PORT_TYPE_OUTPUT) {
                        src = drag_line.node;
                        src_port = drag_line.port;
                        dst = mouseup_node;
                    } else if (drag_line.portType === PORT_TYPE_INPUT) {
                        src = mouseup_node;
                        dst = drag_line.node;
                        src_port = portIndex;
                    }
                    var link = {source: src, sourcePort:src_port, target: dst};
                    if (drag_line.virtualLink) {
                        if (/^link (in|out)$/.test(src.type) && /^link (in|out)$/.test(dst.type) && src.type !== dst.type) {
                            if (src.links.indexOf(dst.id) === -1 && dst.links.indexOf(src.id) === -1) {
                                var oldSrcLinks = $.extend(true,{},{v:src.links}).v
                                var oldDstLinks = $.extend(true,{},{v:dst.links}).v
                                src.links.push(dst.id);
                                dst.links.push(src.id);
                                src.dirty = true;
                                dst.dirty = true;
                                modifiedNodes.push(src);
                                modifiedNodes.push(dst);

                                link.link = true;
                                activeLinks.push(link);
                                activeLinkNodes[src.id] = src;
                                activeLinkNodes[dst.id] = dst;
                                select_link = link;

                                linkEditEvents.push({
                                    t:'edit',
                                    node: src,
                                    dirty: RED.nodes.dirty(),
                                    changed: src.changed,
                                    changes: {
                                        links:oldSrcLinks
                                    }
                                });
                                linkEditEvents.push({
                                    t:'edit',
                                    node: dst,
                                    dirty: RED.nodes.dirty(),
                                    changed: dst.changed,
                                    changes: {
                                        links:oldDstLinks
                                    }
                                });
                                src.changed = true;
                                dst.changed = true;
                            }
                        }
                    } else {
                        // This is not a virtualLink - which means it started
                        // on a regular node port. Need to ensure the this isn't
                        // connecting to a link node virual port.
                        if (!(
                            (d.type === "link out" && portType === PORT_TYPE_OUTPUT) ||
                            (d.type === "link in" && portType === PORT_TYPE_INPUT)
                        )) {
                            var existingLink = RED.nodes.filterLinks({source:src,target:dst,sourcePort: src_port}).length !== 0;
                            if (!existingLink) {
                                RED.nodes.addLink(link);
                                addedLinks.push(link);
                            }
                        }
                    }
                }
            }
            if (addedLinks.length > 0 || removedLinks.length > 0 || modifiedNodes.length > 0) {
                // console.log(addedLinks);
                // console.log(removedLinks);
                // console.log(modifiedNodes);
                var historyEvent;
                if (modifiedNodes.length > 0) {
                    historyEvent = {
                        t:"multi",
                        events: linkEditEvents,
                        dirty:RED.nodes.dirty()
                    };
                } else {
                    historyEvent = {
                        t:"add",
                        links:addedLinks,
                        removedLinks: removedLinks,
                        dirty:RED.nodes.dirty()
                    };
                }
                if (activeSubflow) {
                    var subflowRefresh = RED.subflow.refresh(true);
                    if (subflowRefresh) {
                        historyEvent.subflow = {
                            id:activeSubflow.id,
                            changed: activeSubflow.changed,
                            instances: subflowRefresh.instances
                        }
                    }
                }
                RED.history.push(historyEvent);
                updateActiveNodes();
                RED.nodes.dirty(true);
            }
            if (mouse_mode === RED.state.QUICK_JOINING) {
                if (addedLinks.length > 0 || modifiedNodes.length > 0) {
                    hideDragLines();
                    if (portType === PORT_TYPE_INPUT && d.outputs > 0) {
                        showDragLines([{node:d,port:0,portType:PORT_TYPE_OUTPUT}]);
                    } else if (portType === PORT_TYPE_OUTPUT && d.inputs > 0) {
                        showDragLines([{node:d,port:0,portType:PORT_TYPE_INPUT}]);
                    } else {
                        resetMouseVars();
                    }
                    selected_link = select_link;
                    mousedown_link = select_link;
                    if (select_link) {
                        updateSelection();
                    }
                }
                redraw();
                return;
            }

            resetMouseVars();
            hideDragLines();
            selected_link = select_link;
            mousedown_link = select_link;
            if (select_link) {
                updateSelection();
            }
            redraw();
        }
    }

    var portLabelHoverTimeout = null;
    var portLabelHover = null;


    function getElementPosition(node) {
        var d3Node = d3.select(node);
        if (d3Node.attr('class') === 'red-ui-workspace-chart-event-layer') {
            return [0,0];
        }
        var result = [];
        var localPos = [0,0];
        if (node.nodeName.toLowerCase() === 'g') {
            var transform = d3Node.attr("transform");
            if (transform) {
                localPos = d3.transform(transform).translate;
            }
        } else {
            localPos = [d3Node.attr("x")||0,d3Node.attr("y")||0];
        }
        var parentPos = getElementPosition(node.parentNode);
        return [localPos[0]+parentPos[0],localPos[1]+parentPos[1]]

    }

    function getPortLabel(node,portType,portIndex) {
        var result;
        var nodePortLabels = (portType === PORT_TYPE_INPUT)?node.inputLabels:node.outputLabels;
        if (nodePortLabels && nodePortLabels[portIndex]) {
            return nodePortLabels[portIndex];
        }
        var portLabels = (portType === PORT_TYPE_INPUT)?node._def.inputLabels:node._def.outputLabels;
        if (typeof portLabels === 'string') {
            result = portLabels;
        } else if (typeof portLabels === 'function') {
            try {
                result = portLabels.call(node,portIndex);
            } catch(err) {
                console.log("Definition error: "+node.type+"."+((portType === PORT_TYPE_INPUT)?"inputLabels":"outputLabels"),err);
                result = null;
            }
        } else if ($.isArray(portLabels)) {
            result = portLabels[portIndex];
        }
        return result;
    }
    function showTooltip(x,y,content,direction) {
        var tooltip = eventLayer.append("g")
            .attr("transform","translate("+x+","+y+")")
            .attr("class","red-ui-flow-port-tooltip");

        var lines = content.split("\n");
        var labelWidth = 6;
        var labelHeight = 12;
        var labelHeights = [];
        var lineHeight = 0;
        lines.forEach(function(l,i) {
            var labelDimensions = calculateTextDimensions(l||"&nbsp;", "red-ui-flow-port-tooltip-label", 8,0);
            labelWidth = Math.max(labelWidth,labelDimensions[0] + 6);
            labelHeights.push(labelDimensions[1]);
            if (i === 0) {
                lineHeight = labelDimensions[1];
            }
            labelHeight += labelDimensions[1];
        });
        var labelWidth1 = (labelWidth/2)-5-2;
        var labelWidth2 = labelWidth - 4;

        var labelHeight1 = (labelHeight/2)-5-2;
        var labelHeight2 = labelHeight - 4;
        var path;
        var lx;
        var ly = -labelHeight/2;
        var anchor;
        if (direction === "left") {
            path = "M0 0 l -5 -5 v -"+(labelHeight1)+" q 0 -2 -2 -2 h -"+labelWidth+" q -2 0 -2 2 v "+(labelHeight2)+" q 0 2 2 2 h "+labelWidth+" q 2 0 2 -2 v -"+(labelHeight1)+" l 5 -5";
            lx = -14;
            anchor = "end";
        } else if (direction === "right") {
            path = "M0 0 l 5 -5 v -"+(labelHeight1)+" q 0 -2 2 -2 h "+labelWidth+" q 2 0 2 2 v "+(labelHeight2)+" q 0 2 -2 2 h -"+labelWidth+" q -2 0 -2 -2 v -"+(labelHeight1)+" l -5 -5"
            lx = 14;
            anchor = "start";
        } else if (direction === "top") {
            path = "M0 0 l 5 -5 h "+(labelWidth1)+" q 2 0 2 -2 v -"+labelHeight+" q 0 -2 -2 -2 h -"+(labelWidth2)+" q -2 0 -2 2 v "+labelHeight+" q 0 2 2 2 h "+(labelWidth1)+" l 5 5"
            lx = -labelWidth/2 + 6;
            ly = -labelHeight-lineHeight+12;
            anchor = "start";
        }
        tooltip.append("path").attr("d",path);
        lines.forEach(function(l,i) {
            ly += labelHeights[i];
            // tooltip.append("path").attr("d","M "+(lx-10)+" "+ly+" l 20 0 m -10 -5 l 0 10 ").attr('r',2).attr("stroke","#f00").attr("stroke-width","1").attr("fill","none")
            tooltip.append("svg:text").attr("class","red-ui-flow-port-tooltip-label")
                .attr("x", lx)
                .attr("y", ly)
                .attr("text-anchor",anchor)
                .text(l||" ")
        });
        return tooltip;
    }

    function portMouseOver(port,d,portType,portIndex) {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        clearTimeout(portLabelHoverTimeout);
        var active = (mouse_mode!=RED.state.JOINING && mouse_mode != RED.state.QUICK_JOINING) || // Not currently joining - all ports active
                     (
                         drag_lines.length > 0 && // Currently joining
                         drag_lines[0].portType !== portType && // INPUT->OUTPUT OUTPUT->INPUT
                         (
                             !drag_lines[0].virtualLink || // Not a link wire
                             (drag_lines[0].node.type === 'link in' && d.type === 'link out') ||
                             (drag_lines[0].node.type === 'link out' && d.type === 'link in')
                         )
                     )

        if (active && ((portType === PORT_TYPE_INPUT && ((d._def && d._def.inputLabels)||d.inputLabels)) || (portType === PORT_TYPE_OUTPUT && ((d._def && d._def.outputLabels)||d.outputLabels)))) {
            portLabelHoverTimeout = setTimeout(function() {
                var tooltip = getPortLabel(d,portType,portIndex);
                if (!tooltip) {
                    return;
                }
                var pos = getElementPosition(port.node());
                portLabelHoverTimeout = null;
                portLabelHover = showTooltip(
                    (pos[0]+(portType===PORT_TYPE_INPUT?-2:12)),
                    (pos[1]+5),
                    tooltip,
                    portType===PORT_TYPE_INPUT?"left":"right"
                );
            },500);
        }
        port.classed("red-ui-flow-port-hovered",active);
    }
    function portMouseOut(port,d,portType,portIndex) {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        clearTimeout(portLabelHoverTimeout);
        if (portLabelHover) {
            portLabelHover.remove();
            portLabelHover = null;
        }
        port.classed("red-ui-flow-port-hovered",false);
    }

    function nodeMouseUp(d) {
if (DEBUG_EVENTS) { console.warn("nodeMouseUp", mouse_mode,d); }
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        if (dblClickPrimed && mousedown_node == d && clickElapsed > 0 && clickElapsed < 750) {
            mouse_mode = RED.state.DEFAULT;
            if (d.type != "subflow") {
                RED.editor.edit(d);
            } else {
                RED.editor.editSubflow(activeSubflow);
            }
            clickElapsed = 0;
            d3.event.stopPropagation();
            return;
        }
        if (mouse_mode === RED.state.MOVING) {
            // Moving primed, but not active.
            if (!groupNodeSelectPrimed && !d.selected && d.g && RED.nodes.group(d.g).selected) {
                clearSelection();
                activeGroup = RED.nodes.group(d.g);
                activeGroup.active = true;
                activeGroup.dirty = true;

                selectGroup(RED.nodes.group(d.g), false);
                mousedown_node.selected = true;
                moving_set.push({n:mousedown_node});
                var mouse = d3.touches(this)[0]||d3.mouse(this);
                mouse[0] += d.x-d.w/2;
                mouse[1] += d.y-d.h/2;
                prepareDrag(mouse);
                return;
            }
        }

        groupNodeSelectPrimed = false;

        var direction = d._def? (d.inputs > 0 ? 1: 0) : (d.direction == "in" ? 0: 1)
        var wasJoining = false;
        if (mouse_mode === RED.state.JOINING || mouse_mode === RED.state.QUICK_JOINING) {
            wasJoining = true;
            if (drag_lines.length > 0) {
                if (drag_lines[0].virtualLink) {
                    if (d.type === 'link in') {
                        direction = 1;
                    } else if (d.type === 'link out') {
                        direction = 0;
                    }
                }
            }
        }

        portMouseUp(d, direction, 0);
        if (wasJoining) {
            d3.selectAll(".red-ui-flow-port-hovered").classed("red-ui-flow-port-hovered",false);
        }
    }

    function prepareDrag(mouse) {
        mouse_mode = RED.state.MOVING;
        // Called when moving_set should be prepared to be dragged
        for (i=0;i<moving_set.length;i++) {
            moving_set[i].ox = moving_set[i].n.x;
            moving_set[i].oy = moving_set[i].n.y;
            moving_set[i].dx = moving_set[i].n.x-mouse[0];
            moving_set[i].dy = moving_set[i].n.y-mouse[1];
        }
        mouse_offset = d3.mouse(document.body);
        if (isNaN(mouse_offset[0])) {
            mouse_offset = d3.touches(document.body)[0];
        }
    }

    function nodeMouseDown(d) {
if (DEBUG_EVENTS) { console.warn("nodeMouseDown", mouse_mode,d); }
        focusView();
        if (d3.event.button === 1) {
            return;
        }
        //var touch0 = d3.event;
        //var pos = [touch0.pageX,touch0.pageY];
        //RED.touch.radialMenu.show(d3.select(this),pos);
        if (mouse_mode == RED.state.IMPORT_DRAGGING) {
            RED.keyboard.remove("escape");

            if (activeSpliceLink) {
                // TODO: DRY - droppable/nodeMouseDown/canvasMouseUp
                var spliceLink = d3.select(activeSpliceLink).data()[0];
                RED.nodes.removeLink(spliceLink);
                var link1 = {
                    source:spliceLink.source,
                    sourcePort:spliceLink.sourcePort,
                    target: moving_set[0].n
                };
                var link2 = {
                    source:moving_set[0].n,
                    sourcePort:0,
                    target: spliceLink.target
                };
                RED.nodes.addLink(link1);
                RED.nodes.addLink(link2);
                var historyEvent = RED.history.peek();
                historyEvent.links = [link1,link2];
                historyEvent.removedLinks = [spliceLink];
                updateActiveNodes();
            }

            updateSelection();
            RED.nodes.dirty(true);
            redraw();
            resetMouseVars();
            d3.event.stopPropagation();
            return;
        } else if (mouse_mode == RED.state.QUICK_JOINING) {
            d3.event.stopPropagation();
            return;
        } else if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            if (selectNodesOptions.single) {
                selectNodesOptions.done(d);
                return;
            }
            if (d.selected) {
                d.selected = false;
                for (i=0;i<moving_set.length;i+=1) {
                    if (moving_set[i].n === d) {
                        moving_set.splice(i,1);
                        break;
                    }
                }
            } else {
                if (!selectNodesOptions.filter || selectNodesOptions.filter(d)) {
                    d.selected = true;
                    moving_set.push({n:d});
                }
            }
            d.dirty = true;
            redraw();
            // if (selectNodesOptions && selectNodesOptions.onselect) {
            //     selectNodesOptions.onselect(moving_set.map(function(n) { return n.n;}))
            // }
            return;
        }

        mousedown_node = d;

        var now = Date.now();
        clickElapsed = now-clickTime;
        clickTime = now;

        dblClickPrimed = (lastClickNode == mousedown_node &&
            d3.event.button === 0 &&
            !d3.event.shiftKey && !d3.event.metaKey && !d3.event.altKey && !d3.event.ctrlKey);
            lastClickNode = mousedown_node;

        var i;

        if (!d.selected && d.g /*&& !RED.nodes.group(d.g).selected*/) {
            var nodeGroup = RED.nodes.group(d.g);

            if (nodeGroup !== activeGroup && (d3.event.ctrlKey || d3.event.metaKey)) {
                // Clicked on a node in a non-active group with ctrl pressed
                //  - exit active group
                //  - toggle the select state of the group
                exitActiveGroup();
                groupNodeSelectPrimed = true;
                if (nodeGroup.selected) {
                    deselectGroup(nodeGroup);
                } else {
                    selectGroup(nodeGroup,true);
                }
            } else if (nodeGroup === activeGroup ) {
                // Clicked on a node in the active group
                if (!d3.event.ctrlKey && !d3.event.metaKey) {
                    // Ctrl not pressed so clear selection
                    deselectGroup(nodeGroup);
                    selectGroup(nodeGroup,false);
                }
                // Select this node
                mousedown_node.selected = true;
                moving_set.push({n:mousedown_node});
            } else {
                // Clicked on a node in a group
                //  - if this group is not selected, clear current selection
                //    and select this group
                //  - if this group is not the active group, exit the active group
                //    and select the group
                //  - if this group is the active group, keep it active and
                //    change node selection

                // Set groupNodeSelectPrimed to true as this is a (de)select of the
                // group and NOT meant to trigger going into the group - see nodeMouseUp
                groupNodeSelectPrimed = !nodeGroup.selected;
                var ag = activeGroup;
                if (!nodeGroup.selected) {
                    clearSelection();
                }
                if (ag) {
                    if (ag !== nodeGroup) {
                        ag.active = false;
                        ag.dirty = true;
                    } else {
                        activeGroup = nodeGroup;
                        activeGroup.active = true;
                    }
                } else {
                    dblClickPrimed = false;
                }
                selectGroup(nodeGroup, !activeGroup);
                if (activeGroup) {
                    mousedown_node.selected = true;
                    moving_set.push({n:mousedown_node});
                }
            }


            if (d3.event.button != 2) {
                var mouse = d3.touches(this)[0]||d3.mouse(this);
                mouse[0] += d.x-d.w/2;
                mouse[1] += d.y-d.h/2;
                prepareDrag(mouse);
            }
        } else if (d.selected && (d3.event.ctrlKey||d3.event.metaKey)) {
            mousedown_node.selected = false;
            for (i=0;i<moving_set.length;i+=1) {
                if (moving_set[i].n === mousedown_node) {
                    moving_set.splice(i,1);
                    break;
                }
            }
        } else {

            // if (d.g && !RED.nodes.group(d.g).selected) {
            //     selectGroup(RED.nodes.group(d.g), false);
            // }


            // if (!d.selected && d.g) {
            //     if (!RED.nodes.group(d.g).selected) {// && !RED.nodes.group(d.g).selected) {
            //         clearSelection();
            //         selectGroup(RED.nodes.group(d.g));
            //         d.selected = true;
            //         console.log(d.id,"Setting selected")
            //         d.gSelected = true;
            //     }
            // } else
            if (d3.event.shiftKey) {
                clearSelection();
                var cnodes = RED.nodes.getAllFlowNodes(mousedown_node);
                for (var n=0;n<cnodes.length;n++) {
                    cnodes[n].selected = true;
                    cnodes[n].dirty = true;
                    moving_set.push({n:cnodes[n]});
                }
            } else if (!d.selected) {
                if (!d3.event.ctrlKey && !d3.event.metaKey) {
                    clearSelection();
                } else {
                    exitActiveGroup();
                }
                mousedown_node.selected = true;
                moving_set.push({n:mousedown_node});
            }
            selected_link = null;
            if (d3.event.button != 2) {
                mouse_mode = RED.state.MOVING;
                var mouse = d3.touches(this)[0]||d3.mouse(this);
                mouse[0] += d.x-d.w/2;
                mouse[1] += d.y-d.h/2;
                prepareDrag(mouse);
            }
        }
        d.dirty = true;
        updateSelection();
        redraw();
        d3.event.stopPropagation();
    }

    function groupMouseUp(g) {
        if (dblClickPrimed && mousedown_group == g && clickElapsed > 0 && clickElapsed < 750) {
            mouse_mode = RED.state.DEFAULT;
            RED.editor.editGroup(g);
            d3.event.stopPropagation();
            return;
        }

    }

    function groupMouseDown(g) {
        var mouse = d3.touches(this.parentNode)[0]||d3.mouse(this.parentNode);
        // if (! (mouse[0] < g.x+10 || mouse[0] > g.x+g.w-10 || mouse[1] < g.y+10 || mouse[1] > g.y+g.h-10) ) {
        //     return
        // }

        focusView();
        if (d3.event.button === 1) {
            return;
        }
        if (mouse_mode == RED.state.IMPORT_DRAGGING) {
            RED.keyboard.remove("escape");
            console.log("Dragged a node into the group")
        } else if (mouse_mode == RED.state.QUICK_JOINING) {
            d3.event.stopPropagation();
            return;
        } else if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }

        mousedown_group = g;

        var now = Date.now();
        clickElapsed = now-clickTime;
        clickTime = now;

        dblClickPrimed = (
            lastClickNode == g &&
            d3.event.button === 0 &&
            !d3.event.shiftKey && !d3.event.metaKey && !d3.event.altKey && !d3.event.ctrlKey
        );
        lastClickNode = g;

        if (g.selected && (d3.event.ctrlKey||d3.event.metaKey)) {
            if (g === activeGroup) {
                exitActiveGroup();
            }
            deselectGroup(g);
            d3.event.stopPropagation();
        } else {
            if (!g.selected) {
                if (!d3.event.ctrlKey && !d3.event.metaKey) {
                    clearSelection();
                }
                selectGroup(g,true);//!wasSelected);
            } else {
                exitActiveGroup();
            }


            if (d3.event.button != 2) {
                var d = g.nodes[0];
                prepareDrag(mouse);
                mousedown_group.dx = mousedown_group.x - mouse[0];
                mousedown_group.dy = mousedown_group.y - mouse[1];
            }
        }

        updateSelection();
        redraw();
        d3.event.stopPropagation();
    }

    function selectGroup(g, includeNodes) {
        if (!g.selected) {
            g.selected = true;
            g.dirty = true;
        }
        if (includeNodes) {
            var currentSet = new Set(moving_set.map(function(n) { return n.n }));
            var allNodes = RED.group.getNodes(g,true);
            allNodes.forEach(function(n) {
                if (!currentSet.has(n)) {
                    moving_set.push({n:n})
                    // n.selected = true;
                }
                n.dirty = true;
            })
        }
    }
    function exitActiveGroup() {
        if (activeGroup) {
            activeGroup.active = false;
            activeGroup.dirty = true;
            deselectGroup(activeGroup);
            selectGroup(activeGroup,true);
            activeGroup = null;
        }
    }
    function deselectGroup(g) {
        if (g.selected) {
            g.selected = false;
            g.dirty = true;
        }
        var nodeSet = new Set(g.nodes);
        for (var i = moving_set.length-1; i >= 0; i -= 1) {
            if (nodeSet.has(moving_set[i].n)) {
                moving_set[i].n.selected = false;
                moving_set[i].n.dirty = true;
                moving_set.splice(i,1);
            }
        }
    }
    function getGroupAt(x,y) {
        var candidateGroups = {};
        for (var i=0;i<activeGroups.length;i++) {
            var g = activeGroups[i];
            if (x >= g.x && x <= g.x + g.w && y >= g.y && y <= g.y + g.h) {
                candidateGroups[g.id] = g;
            }
        }
        var ids = Object.keys(candidateGroups);
        if (ids.length > 1) {
            ids.forEach(function(id) {
                if (candidateGroups[id] && candidateGroups[id].g) {
                    delete candidateGroups[candidateGroups[id].g]
                }
            })
            ids = Object.keys(candidateGroups);
        }
        if (ids.length === 0) {
            return null;
        } else {
            return candidateGroups[ids[0]]
        }
    }

    // function groupHandleMouseDown(group, groupEl, handle,handleIndex) {
    //     d3.event.stopPropagation();
    //     console.log("GHANDLE MD");
    //     if (d3.event.button != 2) {
    //         mousedown_group = group;
    //         group.activeHandle = handleIndex;
    //         var mouse = d3.touches(handle.parentNode.parentNode)[0]||d3.mouse(handle.parentNode.parentNode);
    //         switch(handleIndex) {
    //             case 0: group.ox = group.pos.x0; group.oy = group.pos.y0; break;
    //             case 1: group.ox = group.pos.x1; group.oy = group.pos.y0; break;
    //             case 2: group.ox = group.pos.x1; group.oy = group.pos.y1; break;
    //             case 3: group.ox = group.pos.x0; group.oy = group.pos.y1; break;
    //         }
    //         group.dx = group.ox - mouse[0];
    //         group.dy = group.oy - mouse[1];
    //         console.log("START",group.ox, group.oy);
    //         mouse_offset = d3.mouse(document.body);
    //         if (isNaN(mouse_offset[0])) {
    //             mouse_offset = d3.touches(document.body)[0];
    //         }
    //         mouse_mode = RED.state.GROUP_RESIZE;
    //     }
    // }
    // function groupHandleMouseUp(group,groupEl,handle,handleIndex) {
    //     console.log("GHANDLE MU");
    //     d3.event.stopPropagation();
    //     delete group.ox;
    //     delete group.oy;
    //     delete group.dx;
    //     delete group.dy;
    //     resetMouseVars();
    //     mouse_mode = RED.state.DEFAULT;
    // }

    function isButtonEnabled(d) {
        var buttonEnabled = true;
        var ws = RED.nodes.workspace(RED.workspaces.active());
        if (ws && !ws.disabled && !d.d) {
            if (d._def.button.hasOwnProperty('enabled')) {
                if (typeof d._def.button.enabled === "function") {
                    buttonEnabled = d._def.button.enabled.call(d);
                } else {
                    buttonEnabled = d._def.button.enabled;
                }
            }
        } else {
            buttonEnabled = false;
        }
        return buttonEnabled;
    }

    function nodeButtonClicked(d) {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            d3.event.stopPropagation();
            return;
        }
        var activeWorkspace = RED.workspaces.active();
        var ws = RED.nodes.workspace(activeWorkspace);
        if (ws && !ws.disabled && !d.d) {
            if (d._def.button.toggle) {
                d[d._def.button.toggle] = !d[d._def.button.toggle];
                d.dirty = true;
            }
            if (d._def.button.onclick) {
                try {
                    d._def.button.onclick.call(d);
                } catch(err) {
                    console.log("Definition error: "+d.type+".onclick",err);
                }
            }
            if (d.dirty) {
                redraw();
            }
        } else {
            if (activeSubflow) {
                RED.notify(RED._("notification.warning", {message:RED._("notification.warnings.nodeActionDisabledSubflow")}),"warning");
            } else {
                RED.notify(RED._("notification.warning", {message:RED._("notification.warnings.nodeActionDisabled")}),"warning");
            }
        }
        d3.event.preventDefault();
    }

    function showTouchMenu(obj,pos) {
        var mdn = mousedown_node;
        var options = [];
        options.push({name:"delete",disabled:(moving_set.length===0 && selected_link === null),onselect:function() {deleteSelection();}});
        options.push({name:"cut",disabled:(moving_set.length===0),onselect:function() {copySelection();deleteSelection();}});
        options.push({name:"copy",disabled:(moving_set.length===0),onselect:function() {copySelection();}});
        options.push({name:"paste",disabled:(clipboard.length===0),onselect:function() {importNodes(clipboard,false,true);}});
        options.push({name:"edit",disabled:(moving_set.length != 1),onselect:function() { RED.editor.edit(mdn);}});
        options.push({name:"select",onselect:function() {selectAll();}});
        options.push({name:"undo",disabled:(RED.history.depth() === 0),onselect:function() {RED.history.pop();}});

        RED.touch.radialMenu.show(obj,pos,options);
        resetMouseVars();
    }

    function createIconAttributes(iconUrl, icon_group, d) {
        var fontAwesomeUnicode = null;
        if (iconUrl.indexOf("font-awesome/") === 0) {
            var iconName = iconUrl.substr(13);
            var fontAwesomeUnicode = RED.nodes.fontAwesome.getIconUnicode(iconName);
            if (!fontAwesomeUnicode) {
                var iconPath = RED.utils.getDefaultNodeIcon(d._def, d);
                iconUrl = RED.settings.apiRootUrl+"icons/"+iconPath.module+"/"+iconPath.file;
            }
        }
        if (fontAwesomeUnicode) {
            // Since Node-RED workspace uses SVG, i tag cannot be used for font-awesome icon.
            // On SVG, use text tag as an alternative.
            icon_group.append("text")
                .attr("xlink:href",iconUrl)
                .attr("class","fa-lg")
                .attr("x",15)
                .text(fontAwesomeUnicode);
        } else {
            var icon = icon_group.append("image")
                .attr("xlink:href",iconUrl)
                .attr("class","red-ui-flow-node-icon")
                .attr("x",0)
                .attr("width","30")
                .attr("height","30")
                .style("display","none");

            var img = new Image();
            img.src = iconUrl;
            img.onload = function() {
                if (!iconUrl.match(/\.svg$/)) {
                    var largestEdge = Math.max(img.width,img.height);
                    var scaleFactor = 1;
                    if (largestEdge > 30) {
                        scaleFactor = 30/largestEdge;
                    }
                    var width = img.width * scaleFactor;
                    var height = img.height * scaleFactor;
                    icon.attr("width",width);
                    icon.attr("height",height);
                    icon.attr("x",15-width/2);
                }
                icon.attr("xlink:href",iconUrl);
                icon.style("display",null);
                //if ("right" == d._def.align) {
                //    icon.attr("x",function(d){return d.w-img.width-1-(d.outputs>0?5:0);});
                //    icon_shade.attr("x",function(d){return d.w-30});
                //    icon_shade_border.attr("d",function(d){return "M "+(d.w-30)+" 1 l 0 "+(d.h-2);});
                //}
            }
        }
    }

    function redraw() {
        eventLayer.attr("transform","scale("+scaleFactor+")");
        outer.attr("width", space_width*scaleFactor).attr("height", space_height*scaleFactor);

        // Don't bother redrawing nodes if we're drawing links
        if (showAllLinkPorts !== -1 || mouse_mode != RED.state.JOINING) {

            var dirtyNodes = {};

            if (activeSubflow) {
                var subflowOutputs = nodeLayer.selectAll(".red-ui-flow-subflow-port-output").data(activeSubflow.out,function(d,i){ return d.id;});
                subflowOutputs.exit().remove();
                var outGroup = subflowOutputs.enter().insert("svg:g").attr("class","red-ui-flow-node red-ui-flow-subflow-port-output").attr("transform",function(d) { return "translate("+(d.x-20)+","+(d.y-20)+")"});
                outGroup.each(function(d,i) {
                    d.w=40;
                    d.h=40;
                });
                outGroup.append("rect").attr("class","red-ui-flow-subflow-port").attr("rx",8).attr("ry",8).attr("width",40).attr("height",40)
                    // TODO: This is exactly the same set of handlers used for regular nodes - DRY
                    .on("mouseup",nodeMouseUp)
                    .on("mousedown",nodeMouseDown)
                    .on("touchstart",function(d) {
                            var obj = d3.select(this);
                            var touch0 = d3.event.touches.item(0);
                            var pos = [touch0.pageX,touch0.pageY];
                            startTouchCenter = [touch0.pageX,touch0.pageY];
                            startTouchDistance = 0;
                            touchStartTime = setTimeout(function() {
                                    showTouchMenu(obj,pos);
                            },touchLongPressTimeout);
                            nodeMouseDown.call(this,d)
                    })
                    .on("touchend", function(d) {
                            clearTimeout(touchStartTime);
                            touchStartTime = null;
                            if  (RED.touch.radialMenu.active()) {
                                d3.event.stopPropagation();
                                return;
                            }
                            nodeMouseUp.call(this,d);
                    });

                outGroup.append("g").attr('transform','translate(-5,15)').append("rect").attr("class","red-ui-flow-port").attr("rx",3).attr("ry",3).attr("width",10).attr("height",10)
                    .on("mousedown", function(d,i){portMouseDown(d,PORT_TYPE_INPUT,0);} )
                    .on("touchstart", function(d,i){portMouseDown(d,PORT_TYPE_INPUT,0);} )
                    .on("mouseup", function(d,i){portMouseUp(d,PORT_TYPE_INPUT,0);})
                    .on("touchend",function(d,i){portMouseUp(d,PORT_TYPE_INPUT,0);} )
                    .on("mouseover",function(d){portMouseOver(d3.select(this),d,PORT_TYPE_INPUT,0);})
                    .on("mouseout",function(d){portMouseOut(d3.select(this),d,PORT_TYPE_INPUT,0);});

                outGroup.append("svg:text").attr("class","red-ui-flow-port-label").attr("x",20).attr("y",12).style("font-size","10px").text("output");
                outGroup.append("svg:text").attr("class","red-ui-flow-port-label red-ui-flow-port-index").attr("x",20).attr("y",28).text(function(d,i){ return i+1});

                var subflowInputs = nodeLayer.selectAll(".red-ui-flow-subflow-port-input").data(activeSubflow.in,function(d,i){ return d.id;});
                subflowInputs.exit().remove();
                var inGroup = subflowInputs.enter().insert("svg:g").attr("class","red-ui-flow-node red-ui-flow-subflow-port-input").attr("transform",function(d) { return "translate("+(d.x-20)+","+(d.y-20)+")"});
                inGroup.each(function(d,i) {
                    d.w=40;
                    d.h=40;
                });
                inGroup.append("rect").attr("class","red-ui-flow-subflow-port").attr("rx",8).attr("ry",8).attr("width",40).attr("height",40)
                    // TODO: This is exactly the same set of handlers used for regular nodes - DRY
                    .on("mouseup",nodeMouseUp)
                    .on("mousedown",nodeMouseDown)
                    .on("touchstart",function(d) {
                            var obj = d3.select(this);
                            var touch0 = d3.event.touches.item(0);
                            var pos = [touch0.pageX,touch0.pageY];
                            startTouchCenter = [touch0.pageX,touch0.pageY];
                            startTouchDistance = 0;
                            touchStartTime = setTimeout(function() {
                                    showTouchMenu(obj,pos);
                            },touchLongPressTimeout);
                            nodeMouseDown.call(this,d)
                    })
                    .on("touchend", function(d) {
                            clearTimeout(touchStartTime);
                            touchStartTime = null;
                            if  (RED.touch.radialMenu.active()) {
                                d3.event.stopPropagation();
                                return;
                            }
                            nodeMouseUp.call(this,d);
                    });

                inGroup.append("g").attr('transform','translate(35,15)').append("rect").attr("class","red-ui-flow-port").attr("rx",3).attr("ry",3).attr("width",10).attr("height",10)
                    .on("mousedown", function(d,i){portMouseDown(d,PORT_TYPE_OUTPUT,i);} )
                    .on("touchstart", function(d,i){portMouseDown(d,PORT_TYPE_OUTPUT,i);} )
                    .on("mouseup", function(d,i){portMouseUp(d,PORT_TYPE_OUTPUT,i);})
                    .on("touchend",function(d,i){portMouseUp(d,PORT_TYPE_OUTPUT,i);} )
                    .on("mouseover",function(d){portMouseOver(d3.select(this),d,PORT_TYPE_OUTPUT,0);})
                    .on("mouseout",function(d) {portMouseOut(d3.select(this),d,PORT_TYPE_OUTPUT,0);});

                inGroup.append("svg:text").attr("class","red-ui-flow-port-label").attr("x",18).attr("y",20).style("font-size","10px").text("input");

                var subflowStatus = nodeLayer.selectAll(".red-ui-flow-subflow-port-status").data(activeSubflow.status?[activeSubflow.status]:[],function(d,i){ return d.id;});
                subflowStatus.exit().remove();

                var statusGroup = subflowStatus.enter().insert("svg:g").attr("class","red-ui-flow-node red-ui-flow-subflow-port-status").attr("transform",function(d) { return "translate("+(d.x-20)+","+(d.y-20)+")"});
                statusGroup.each(function(d,i) {
                    d.w=40;
                    d.h=40;
                });
                statusGroup.append("rect").attr("class","red-ui-flow-subflow-port").attr("rx",8).attr("ry",8).attr("width",40).attr("height",40)
                    // TODO: This is exactly the same set of handlers used for regular nodes - DRY
                    .on("mouseup",nodeMouseUp)
                    .on("mousedown",nodeMouseDown)
                    .on("touchstart",function(d) {
                            var obj = d3.select(this);
                            var touch0 = d3.event.touches.item(0);
                            var pos = [touch0.pageX,touch0.pageY];
                            startTouchCenter = [touch0.pageX,touch0.pageY];
                            startTouchDistance = 0;
                            touchStartTime = setTimeout(function() {
                                    showTouchMenu(obj,pos);
                            },touchLongPressTimeout);
                            nodeMouseDown.call(this,d)
                    })
                    .on("touchend", function(d) {
                            clearTimeout(touchStartTime);
                            touchStartTime = null;
                            if  (RED.touch.radialMenu.active()) {
                                d3.event.stopPropagation();
                                return;
                            }
                            nodeMouseUp.call(this,d);
                    });

                statusGroup.append("g").attr('transform','translate(-5,15)').append("rect").attr("class","red-ui-flow-port").attr("rx",3).attr("ry",3).attr("width",10).attr("height",10)
                    .on("mousedown", function(d,i){portMouseDown(d,PORT_TYPE_INPUT,0);} )
                    .on("touchstart", function(d,i){portMouseDown(d,PORT_TYPE_INPUT,0);} )
                    .on("mouseup", function(d,i){portMouseUp(d,PORT_TYPE_INPUT,0);})
                    .on("touchend",function(d,i){portMouseUp(d,PORT_TYPE_INPUT,0);} )
                    .on("mouseover",function(d){portMouseOver(d3.select(this),d,PORT_TYPE_INPUT,0);})
                    .on("mouseout",function(d){portMouseOut(d3.select(this),d,PORT_TYPE_INPUT,0);});

                statusGroup.append("svg:text").attr("class","red-ui-flow-port-label").attr("x",22).attr("y",20).style("font-size","10px").text("status");

                subflowOutputs.each(function(d,i) {
                    if (d.dirty) {
                        var output = d3.select(this);
                        output.classed("red-ui-flow-node-selected",function(d) { return d.selected; })
                        output.selectAll(".red-ui-flow-port-index").text(function(d){ return d.i+1});
                        output.attr("transform", function(d) { return "translate(" + (d.x-d.w/2) + "," + (d.y-d.h/2) + ")"; });
                        dirtyNodes[d.id] = d;
                        d.dirty = false;
                    }
                });
                subflowInputs.each(function(d,i) {
                    if (d.dirty) {
                        var input = d3.select(this);
                        input.classed("red-ui-flow-node-selected",function(d) { return d.selected; })
                        input.attr("transform", function(d) { return "translate(" + (d.x-d.w/2) + "," + (d.y-d.h/2) + ")"; });
                        dirtyNodes[d.id] = d;
                        d.dirty = false;
                    }
                });
                subflowStatus.each(function(d,i) {
                    if (d.dirty) {
                        var output = d3.select(this);
                        output.classed("red-ui-flow-node-selected",function(d) { return d.selected; })
                        output.selectAll(".red-ui-flow-port-index").text(function(d){ return d.i+1});
                        output.attr("transform", function(d) { return "translate(" + (d.x-d.w/2) + "," + (d.y-d.h/2) + ")"; });
                        dirtyNodes[d.id] = d;
                        d.dirty = false;
                    }
                });


            } else {
                nodeLayer.selectAll(".red-ui-flow-subflow-port-output").remove();
                nodeLayer.selectAll(".red-ui-flow-subflow-port-input").remove();
                nodeLayer.selectAll(".red-ui-flow-subflow-port-status").remove();
            }

            var node = nodeLayer.selectAll(".red-ui-flow-node-group").data(activeNodes,function(d){return d.id});
            node.exit().remove();

            var nodeEnter = node.enter().insert("svg:g")
                .attr("class", "red-ui-flow-node red-ui-flow-node-group")
                .classed("red-ui-flow-subflow",function(d) { return activeSubflow != null; });

            nodeEnter.each(function(d,i) {
                    var node = d3.select(this);
                    var isLink = (d.type === "link in" || d.type === "link out")
                    var hideLabel = d.hasOwnProperty('l')?!d.l : isLink;
                    node.attr("id",d.id);
                    var labelWidth = calculateTextWidth(RED.utils.getNodeLabel(d), "red-ui-flow-node-label", 50);
                    if (d.resize || d.w === undefined) {
                        if (hideLabel) {
                            d.w = node_height;
                        } else {
                            d.w = Math.max(node_width,20*(Math.ceil((labelWidth+(d._def.inputs>0?7:0))/20)) );
                        }
                    }
                    if (hideLabel) {
                        d.h = Math.max(node_height,(d.outputs || 0) * 15);
                    } else {
                        d.h = Math.max(6+24*separateTextByLineBreak.length, (d.outputs || 0) * 15, 30);
                    }
                    // if (d._def.badge) {
                    //     var badge = node.append("svg:g").attr("class","node_badge_group");
                    //     var badgeRect = badge.append("rect").attr("class","node_badge").attr("rx",5).attr("ry",5).attr("width",40).attr("height",15);
                    //     badge.append("svg:text").attr("class","node_badge_label").attr("x",35).attr("y",11).attr("text-anchor","end").text(d._def.badge());
                    //     if (d._def.onbadgeclick) {
                    //         badgeRect.attr("cursor","pointer")
                    //             .on("click",function(d) { d._def.onbadgeclick.call(d);d3.event.preventDefault();});
                    //     }
                    // }

                    if (d._def.button) {
                        var nodeButtonGroup = node.append("svg:g")
                            .attr("transform",function(d) { return "translate("+((d._def.align == "right") ? 94 : -25)+",2)"; })
                            .attr("class","red-ui-flow-node-button");
                        nodeButtonGroup.append("rect")
                            .attr("class","red-ui-flow-node-button-background")
                            .attr("rx",5)
                            .attr("ry",5)
                            .attr("width",32)
                            .attr("height",node_height-4);
                        nodeButtonGroup.append("rect")
                            .attr("class","red-ui-flow-node-button-button")
                            .attr("x",function(d) { return d._def.align == "right"? 11:5})
                            .attr("y",4)
                            .attr("rx",4)
                            .attr("ry",4)
                            .attr("width",16)
                            .attr("height",node_height-12)
                            .attr("fill",function(d) { return RED.utils.getNodeColor(d.type,d._def); /*d._def.color;*/})
                            .attr("cursor","pointer")
                            .on("mousedown",function(d) {if (!lasso && isButtonEnabled(d)) {focusView();d3.select(this).attr("fill-opacity",0.2);d3.event.preventDefault(); d3.event.stopPropagation();}})
                            .on("mouseup",function(d) {if (!lasso && isButtonEnabled(d)) { d3.select(this).attr("fill-opacity",0.4);d3.event.preventDefault();d3.event.stopPropagation();}})
                            .on("mouseover",function(d) {if (!lasso && isButtonEnabled(d)) { d3.select(this).attr("fill-opacity",0.4);}})
                            .on("mouseout",function(d) {if (!lasso && isButtonEnabled(d)) {
                                var op = 1;
                                if (d._def.button.toggle) {
                                    op = d[d._def.button.toggle]?1:0.2;
                                }
                                d3.select(this).attr("fill-opacity",op);
                            }})
                            .on("click",nodeButtonClicked)
                            .on("touchstart",nodeButtonClicked)
                    }

                    var mainRect = node.append("rect")
                        .attr("class", "red-ui-flow-node")
                        .classed("red-ui-flow-node-unknown",function(d) { return d.type == "unknown"; })
                        .attr("rx", 5)
                        .attr("ry", 5)
                        .attr("fill",function(d) { return RED.utils.getNodeColor(d.type,d._def); /*d._def.color;*/})
                        .on("mouseup",nodeMouseUp)
                        .on("mousedown",nodeMouseDown)
                        .on("touchstart",function(d) {
                            var obj = d3.select(this);
                            var touch0 = d3.event.touches.item(0);
                            var pos = [touch0.pageX,touch0.pageY];
                            startTouchCenter = [touch0.pageX,touch0.pageY];
                            startTouchDistance = 0;
                            touchStartTime = setTimeout(function() {
                                showTouchMenu(obj,pos);
                            },touchLongPressTimeout);
                            nodeMouseDown.call(this,d)
                        })
                        .on("touchend", function(d) {
                            clearTimeout(touchStartTime);
                            touchStartTime = null;
                            if  (RED.touch.radialMenu.active()) {
                                d3.event.stopPropagation();
                                return;
                            }
                            nodeMouseUp.call(this,d);
                        })
                        .on("mouseover",function(d) {
                            if (mouse_mode === 0 || mouse_mode === RED.state.SELECTING_NODE) {
                                if (mouse_mode === RED.state.SELECTING_NODE && selectNodesOptions && selectNodesOptions.filter) {
                                    if (selectNodesOptions.filter(d)) {
                                        node.classed("red-ui-flow-node-hovered",true);
                                    }
                                } else {
                                    node.classed("red-ui-flow-node-hovered",true);
                                }
                                clearTimeout(portLabelHoverTimeout);
                                if (d.hasOwnProperty('l')?!d.l : (d.type === "link in" || d.type === "link out")) {
                                    portLabelHoverTimeout = setTimeout(function() {
                                        var tooltip;
                                        if (d._def.label) {
                                            tooltip = d._def.label;
                                            try {
                                                tooltip = (typeof tooltip === "function" ? tooltip.call(d) : tooltip)||"";
                                            } catch(err) {
                                                console.log("Definition error: "+d.type+".label",err);
                                                tooltip = d.type;
                                            }
                                        }
                                        if (tooltip !== "") {
                                            var pos = getElementPosition(node.node());
                                            portLabelHoverTimeout = null;
                                            portLabelHover = showTooltip(
                                                (pos[0] + d.w/2),
                                                (pos[1]-1),
                                                tooltip,
                                                "top"
                                            );
                                        }
                                    },500);
                                }
                            } else if (mouse_mode === RED.state.JOINING || mouse_mode === RED.state.QUICK_JOINING) {
                                if (drag_lines.length > 0) {
                                    var selectClass;
                                    var portType;
                                    if ((drag_lines[0].virtualLink && drag_lines[0].portType === PORT_TYPE_INPUT) || drag_lines[0].portType === PORT_TYPE_OUTPUT) {
                                        selectClass = ".red-ui-flow-port-input .red-ui-flow-port";
                                        portType = PORT_TYPE_INPUT;
                                    } else {
                                        selectClass = ".red-ui-flow-port-output .red-ui-flow-port";
                                        portType = PORT_TYPE_OUTPUT;
                                    }
                                    portMouseOver(d3.select(this.parentNode).selectAll(selectClass),d,portType,0);
                                }
                            }
                        })
                        .on("mouseout",function(d) {
                            node.classed("red-ui-flow-node-hovered",false);
                            clearTimeout(portLabelHoverTimeout);
                            if (portLabelHover) {
                                portLabelHover.remove();
                                portLabelHover = null;
                            }
                            if (mouse_mode === RED.state.JOINING || mouse_mode === RED.state.QUICK_JOINING) {
                                if (drag_lines.length > 0) {
                                    var selectClass;
                                    var portType;
                                    if ((drag_lines[0].virtualLink && drag_lines[0].portType === PORT_TYPE_INPUT) || drag_lines[0].portType === PORT_TYPE_OUTPUT) {
                                        selectClass = ".red-ui-flow-port-input .red-ui-flow-port";
                                        portType = PORT_TYPE_INPUT;
                                    } else {
                                        selectClass = ".red-ui-flow-port-output .red-ui-flow-port";
                                        portType = PORT_TYPE_OUTPUT;
                                    }
                                    portMouseOut(d3.select(this.parentNode).selectAll(selectClass),d,portType,0);
                                }
                            }
                        });

                   //node.append("rect").attr("class", "node-gradient-top").attr("rx", 6).attr("ry", 6).attr("height",30).attr("stroke","none").attr("fill","url(#gradient-top)").style("pointer-events","none");
                   //node.append("rect").attr("class", "node-gradient-bottom").attr("rx", 6).attr("ry", 6).attr("height",30).attr("stroke","none").attr("fill","url(#gradient-bottom)").style("pointer-events","none");

                    if (d._def.icon) {
                        var icon_url = RED.utils.getNodeIcon(d._def,d);
                        var icon_group = node.append("g")
                            .attr("class","red-ui-flow-node-icon-group")
                            .attr("x",0).attr("y",0);

                        var icon_shade = icon_group.append("rect")
                            .attr("x",0).attr("y",0)
                            .attr("class","red-ui-flow-node-icon-shade")
                            .attr("width","30")
                            .attr("height",function(d){return Math.min(50,d.h-4);});

                        createIconAttributes(icon_url, icon_group, d);

                        var icon_shade_border = icon_group.append("path")
                            .attr("d",function(d) { return "M 30 1 l 0 "+(d.h-2)})
                            .attr("class","red-ui-flow-node-icon-shade-border");

                        if ("right" == d._def.align) {
                            icon_group.attr("class","red-ui-flow-node-icon-group red-ui-flow-node-icon-group-"+d._def.align);
                            icon_shade_border.attr("d",function(d) { return "M 0 1 l 0 "+(d.h-2)})
                            //icon.attr("class","red-ui-flow-node-icon red-ui-flow-node-icon-"+d._def.align);
                            //icon.attr("class","red-ui-flow-node-icon-shade red-ui-flow-node-icon-shade-"+d._def.align);
                            //icon.attr("class","red-ui-flow-node-icon-shade-border red-ui-flow-node-icon-shade-border-"+d._def.align);
                        }

                        //if (d.inputs > 0 && d._def.align == null) {
                        //    icon_shade.attr("width",35);
                        //    icon.attr("transform","translate(5,0)");
                        //    icon_shade_border.attr("transform","translate(5,0)");
                        //}
                        //if (d._def.outputs > 0 && "right" == d._def.align) {
                        //    icon_shade.attr("width",35); //icon.attr("x",5);
                        //}

                        //icon.style("pointer-events","none");
                        icon_group.style("pointer-events","none");
                    }
                    var labelLineNumber = (separateTextByLineBreak.length == 0)? 1:separateTextByLineBreak.length;
                    var labelId = d.id.replace(".","-");
                    for(var i=0;i<labelLineNumber;i++) {
                        var text = node.append("svg:text")
                                  .attr("class","red-ui-flow-node-label")
                                  .attr("id", "red-ui-flow-node-label-"+labelId+"-"+i)
                                  .attr("x", 38)
                                  .attr("dy", ".3px")
                                  .attr("text-anchor","start")
                                  .classed("hide",hideLabel);

                        if (d._def.align) {
                            text.attr("class","red-ui-flow-node-label red-ui-flow-node-label-"+d._def.align);
                            if (d._def.align === "right") {
                             text.attr("text-anchor","end");
                            }
                        }
                    }

                    var status = node.append("svg:g").attr("class","red-ui-flow-node-status-group").style("display","none");
                    var statusRect = status.append("rect").attr("class","red-ui-flow-node-status")
                                        .attr("x",6).attr("y",1).attr("width",9).attr("height",9)
                                        .attr("rx",2).attr("ry",2).attr("stroke-width","3");
                    var statusLabel = status.append("svg:text")
                        .attr("class","red-ui-flow-node-status-label")
                        .attr("x",20).attr("y",10);

                    node.append("g").attr("class","red-ui-flow-node-changed hide").attr("transform","translate(20, -2)").append("circle").attr("r",5);
                    var nodeErrorButton = node.append("g").attr("class","red-ui-flow-node-error hide").attr("transform","translate(0, -2)").append("path").attr("d","M -5,4 l 10,0 -5,-8 z");
                    nodeErrorButton.on("mouseenter", function() {
                        if (d.validationErrors && d.validationErrors.length > 0) {
                            clearTimeout(portLabelHoverTimeout);
                            portLabelHoverTimeout = setTimeout(function() {
                                var pos = getElementPosition(nodeErrorButton.node());
                                portLabelHoverTimeout = null;
                                portLabelHover = showTooltip(
                                    (pos[0]),
                                    (pos[1]),
                                    RED._("editor.errors.invalidProperties")+"\n  - "+d.validationErrors.join("\n    - "),
                                    "top"
                                );
                            },500);
                        }
                    }).on("mouseleave", function() {
                        clearTimeout(portLabelHoverTimeout);
                        if (portLabelHover) {
                            portLabelHover.remove();
                            portLabelHover = null;
                        }
                    });
            });

            node.each(function(d,i) {
                    if (d.dirty) {
                        var isLink = (d.type === "link in" || d.type === "link out")
                        var hideLabel = d.hasOwnProperty('l')?!d.l : isLink;
                        dirtyNodes[d.id] = d;
                        //if (d.x < -50) deleteSelection();  // Delete nodes if dragged back to palette
                        var labelLineNumber = (d.h-6)/24;
                        var labelWidth = calculateTextWidth(RED.utils.getNodeLabel(d), "red-ui-flow-node-label", 50);
                        if (d.resize) {
                            var ow = d.w;
                            if (hideLabel) {
                                d.w = node_height;
                            } else {
                                d.w = Math.max(node_width,20*(Math.ceil((labelWidth+(d._def.inputs>0?7:0))/20)) );
                            }
                            // d.w = Math.max(node_width,20*(Math.ceil((calculateTextWidth(l, "red-ui-flow-node-label", 50)+(d._def.inputs>0?7:0))/20)) );
                            d.x += (d.w-ow)/2;
                            d.resize = false;
                        }
                        if (hideLabel) {
                            d.h = Math.max(node_height,(d.outputs || 0) * 15);
                        } else {
                            d.h = Math.max(6+24*separateTextByLineBreak.length,(d.outputs || 0) * 15, 30);
                        }

                        var thisNode = d3.select(this);
                        thisNode.classed("red-ui-flow-node-disabled", function(d) { return d.d === true});
                        thisNode.classed("red-ui-flow-subflow",function(d) { return activeSubflow != null; })

                        //thisNode.selectAll(".centerDot").attr({"cx":function(d) { return d.w/2;},"cy":function(d){return d.h/2}});
                        thisNode.attr("transform", function(d) { return "translate(" + (d.x-d.w/2) + "," + (d.y-d.h/2) + ")"; });
                        if (mouse_mode != RED.state.MOVING_ACTIVE) {
                            thisNode.classed("red-ui-flow-node-selected",function(d) { return d.selected })
                            thisNode.selectAll(".red-ui-flow-node")
                                .attr("width",function(d){return d.w})
                                .attr("height",function(d){return d.h})
                                .classed("red-ui-flow-node-highlighted",function(d) { return d.highlighted; })
                            ;
                            var l = "";
                            if (d._def.label) {
                                l = d._def.label;
                                try {
                                    l = (typeof l === "function" ? l.call(d) : l)||"";
                                    l = RED.text.bidi.enforceTextDirectionWithUCC(l);
                                } catch(err) {
                                    console.log("Definition error: "+d.type+".label",err);
                                    l = d.type;
                                }
                            }
                            var sa = convertLineBreakCharacter(l);
                            var sn = sa.length;
                            var st = "";
                            var yp = d.h / 2 - (sn / 2) * 24 + 16
                            var labelId = d.id.replace(".","-");
                            if(labelLineNumber<sn) {
                                for(var i=labelLineNumber;i<sn;i++) {
                                    var text = node.append("svg:text")
                                        .attr("class","red-ui-flow-node-label")
                                        .attr("id","red-ui-flow-node-label-"+labelId+"-"+i)
                                        .attr("x", 38)
                                        .attr("dy", ".3px")
                                        .attr("text-anchor","start")
                                        .classed("hide",hideLabel);

                                    if (d._def.align) {
                                        text.attr("class","red-ui-flow-node-label red-ui-flow-node-label-"+d._def.align);
                                        if (d._def.align === "right") {
                                            text.attr("text-anchor","end");
                                        }
                                    }
                                }
                            } else if (0 < sn && sn < labelLineNumber){
                                for(var i=sn;i<labelLineNumber;i++) {
                                    thisNode.select("#red-ui-flow-node-label-"+labelId+"-"+i).remove();
                                }
                            }
                            for (var ic = 0; ic < sn; ic++) {
                                var yn = yp + ic * 24;
                                thisNode.select("#red-ui-flow-node-label-"+labelId+"-"+ic)
                                    .text(function(d,i){
                                        return separateTextByLineBreak[ic];
                                    })
                                    .attr("y", function(d){return yn;})
                                    .attr("class",function(d){
                                        var s = "";
                                        if (d._def.labelStyle) {
                                           s = d._def.labelStyle;
                                           try {
                                          s = (typeof s === "function" ? s.call(d) : s)||"";
                                           } catch(err) {
                                            console.log("Definition error: "+d.type+".labelStyle",err);
                                            s = "";
                                        }
                                        s = " "+s;
                                    }
                                    return "red-ui-flow-node-label"+(d._def.align?" red-ui-flow-node-label-"+d._def.align:"")+s;
                                    }).classed("hide",hideLabel);
                            }
                            if ((!d._def.align && d.inputs !== 0 && d.outputs === 0) || "right" === d._def.align) {
                                thisNode.selectAll(".red-ui-flow-node-icon-group").classed("red-ui-flow-node-icon-group-right", true);
                                thisNode.selectAll(".red-ui-flow-node-label").classed("red-ui-flow-node-label-right", true).attr("text-anchor", "end");
                            } else {
                                thisNode.selectAll(".red-ui-flow-node-icon-group").classed("red-ui-flow-node-icon-group-right", false);
                                thisNode.selectAll(".red-ui-flow-node-label").classed("red-ui-flow-node-label-right", false).attr("text-anchor", "start");
                            }
                            var alignX;
                            thisNode.selectAll(".red-ui-flow-node-icon-group").attr("transform", function (d) { return "translate(0, 0)"; });
                            thisNode.selectAll(".red-ui-flow-node-label").attr("x", function (d) { alignX=38; return 38; });
                            thisNode.selectAll(".red-ui-flow-node-icon-group-right").attr("transform", function(d){return "translate("+(d.w-30)+",0)"});
                            thisNode.selectAll(".red-ui-flow-node-label-right").attr("x", function(d){ alignX=d.w-38; return d.w-38});
                            //thisNode.selectAll(".red-ui-flow-node-icon-right").attr("x",function(d){return d.w-d3.select(this).attr("width")-1-(d.outputs>0?5:0);});
                            //thisNode.selectAll(".red-ui-flow-node-icon-shade-right").attr("x",function(d){return d.w-30;});
                            //thisNode.selectAll(".red-ui-flow-node-icon-shade-border-right").attr("d",function(d){return "M "+(d.w-30)+" 1 l 0 "+(d.h-2)});

                            var inputPorts = thisNode.selectAll(".red-ui-flow-port-input");
                            if ((!isLink || (showAllLinkPorts === -1 && !activeLinkNodes[d.id])) && d.inputs === 0 && !inputPorts.empty()) {
                                inputPorts.remove();
                            } else if (((isLink && (showAllLinkPorts===PORT_TYPE_INPUT||activeLinkNodes[d.id]))|| d.inputs === 1) && inputPorts.empty()) {
                                var inputGroup = thisNode.append("g").attr("class","red-ui-flow-port-input");
                                var inputGroupPorts;

                                if (d.type === "link in") {
                                    inputGroupPorts = inputGroup.append("circle")
                                        .attr("cx",-1).attr("cy",5)
                                        .attr("r",5)
                                        .attr("class","red-ui-flow-port red-ui-flow-link-port")
                                } else {
                                    inputGroupPorts = inputGroup.append("rect").attr("class","red-ui-flow-port").attr("rx",3).attr("ry",3).attr("width",10).attr("height",10)
                                }
                                inputGroupPorts.on("mousedown",function(d){portMouseDown(d,PORT_TYPE_INPUT,0);})
                                    .on("touchstart",function(d){portMouseDown(d,PORT_TYPE_INPUT,0);})
                                    .on("mouseup",function(d){portMouseUp(d,PORT_TYPE_INPUT,0);} )
                                    .on("touchend",function(d){portMouseUp(d,PORT_TYPE_INPUT,0);} )
                                    .on("mouseover",function(d){portMouseOver(d3.select(this),d,PORT_TYPE_INPUT,0);})
                                    .on("mouseout",function(d) {portMouseOut(d3.select(this),d,PORT_TYPE_INPUT,0);});
                            }

                            var numOutputs = d.outputs;
                            if (isLink && d.type === "link out") {
                                if (showAllLinkPorts===PORT_TYPE_OUTPUT || activeLinkNodes[d.id]) {
                                    d.ports = [0];
                                    numOutputs = 1;
                                } else {
                                    d.ports = [];
                                    numOutputs = 0;
                                }
                            }
                            var y = (d.h/2)-((numOutputs-1)/2)*13;
                            d.ports = d.ports || d3.range(numOutputs);
                            d._ports = thisNode.selectAll(".red-ui-flow-port-output").data(d.ports);
                            var output_group = d._ports.enter().append("g").attr("class","red-ui-flow-port-output");
                            var output_group_ports;

                            if (d.type === "link out") {
                                output_group_ports = output_group.append("circle")
                                    .attr("cx",11).attr("cy",5)
                                    .attr("r",5)
                                    .attr("class","red-ui-flow-port red-ui-flow-link-port")
                            } else {
                                output_group_ports = output_group.append("rect")
                                    .attr("class","red-ui-flow-port")
                                    .attr("rx",3).attr("ry",3)
                                    .attr("width",10)
                                    .attr("height",10)
                            }

                            output_group_ports.on("mousedown",(function(){var node = d; return function(d,i){portMouseDown(node,PORT_TYPE_OUTPUT,i);}})() )
                                .on("touchstart",(function(){var node = d; return function(d,i){portMouseDown(node,PORT_TYPE_OUTPUT,i);}})() )
                                .on("mouseup",(function(){var node = d; return function(d,i){portMouseUp(node,PORT_TYPE_OUTPUT,i);}})() )
                                .on("touchend",(function(){var node = d; return function(d,i){portMouseUp(node,PORT_TYPE_OUTPUT,i);}})() )
                                .on("mouseover",(function(){var node = d; return function(d,i){portMouseOver(d3.select(this),node,PORT_TYPE_OUTPUT,i);}})())
                                .on("mouseout",(function(){var node = d; return function(d,i) {portMouseOut(d3.select(this),node,PORT_TYPE_OUTPUT,i);}})());

                            d._ports.exit().remove();
                            if (d._ports) {
                                numOutputs = d.outputs || 1;
                                y = (d.h/2)-((numOutputs-1)/2)*13;
                                var x = d.w - 5;
                                d._ports.each(function(d,i) {
                                        var port = d3.select(this);
                                        port.attr("transform", function(d) { return "translate("+x+","+((y+13*i)-5)+")";});
                                });
                            }
                            if (d._def.icon) {
                                var icon = thisNode.select(".red-ui-flow-node-icon");
                                var faIcon = thisNode.select(".fa-lg");
                                var current_url;
                                if (!icon.empty()) {
                                    current_url = icon.attr("xlink:href");
                                } else {
                                    current_url = faIcon.attr("xlink:href");
                                }
                                var new_url = RED.utils.getNodeIcon(d._def,d);
                                if (new_url !== current_url) {
                                    if (!icon.empty()) {
                                        icon.remove();
                                    } else {
                                        faIcon.remove();
                                    }
                                    var iconGroup = thisNode.select(".red-ui-flow-node-icon-group");
                                    createIconAttributes(new_url, iconGroup, d);
                                }
                            }

                            thisNode.selectAll(".red-ui-flow-node-changed")
                                .attr("transform",function(d){return "translate("+(d.w-10)+", -2)"})
                                .classed("hide",function(d) { return !(d.changed||d.moved); });

                            thisNode.selectAll(".red-ui-flow-node-error")
                                .attr("transform",function(d){ return "translate("+(d.w-10-((d.changed||d.moved)?14:0))+", -2)"})
                                .classed("hide",function(d) { return d.valid; });

                            thisNode.selectAll(".red-ui-flow-port-input").each(function(d,i) {
                                var port = d3.select(this);
                                port.attr("transform",function(d){return "translate(-5,"+((d.h/2)-5)+")";})
                            });

                            thisNode.selectAll(".red-ui-flow-node-icon").attr("y",function(d){return (d.h-d3.select(this).attr("height"))/2;});
                            thisNode.selectAll(".red-ui-flow-node-icon-shade").attr("height",function(d){return d.h;});
                            thisNode.selectAll(".red-ui-flow-node-icon-shade-border").attr("d", function (d) {
                                return "M " + (((!d._def.align && d.inputs !== 0 && d.outputs === 0) || "right" === d._def.align) ? 0 : 30) + " 1 l 0 " + (d.h - 2);
                            });
                            thisNode.selectAll(".fa-lg").attr("y",function(d){return (d.h+13)/2;});

                            thisNode.selectAll(".red-ui-flow-node-button").attr("opacity",function(d) {
                                return (!isButtonEnabled(d))?0.4:1
                            });
                            thisNode.selectAll(".red-ui-flow-node-button-button").attr("cursor",function(d) {
                                return (!isButtonEnabled(d))?"":"pointer";
                            });
                            thisNode.selectAll(".red-ui-flow-node-button").attr("transform",function(d){
                                var x = d._def.align == "right"?d.w-6:-25;
                                if (d._def.button.toggle && !d[d._def.button.toggle]) {
                                    x = x - (d._def.align == "right"?8:-8);
                                }
                                return "translate("+x+",2)";
                            });
                            thisNode.selectAll(".red-ui-flow-node-button rect").attr("fill-opacity",function(d){
                                if (d._def.button.toggle) {
                                    return d[d._def.button.toggle]?1:0.2;
                                }
                                return 1;
                            });

                            if (d._def.button && (typeof d._def.button.visible === "function")) { // is defined and a function...
                                if (d._def.button.visible.call(d) === false) {
                                    thisNode.selectAll(".red-ui-flow-node-button").style("display","none");
                                }
                                else {
                                    thisNode.selectAll(".red-ui-flow-node-button").style("display","inherit");
                                }
                            }

                            // thisNode.selectAll(".node_badge_group").attr("transform",function(d){return "translate("+(d.w-40)+","+(d.h+3)+")";});
                            // thisNode.selectAll("text.node_badge_label").text(function(d,i) {
                            //     if (d._def.badge) {
                            //         if (typeof d._def.badge == "function") {
                            //             try {
                            //                 return d._def.badge.call(d);
                            //             } catch(err) {
                            //                 console.log("Definition error: "+d.type+".badge",err);
                            //                 return "";
                            //             }
                            //         } else {
                            //             return d._def.badge;
                            //         }
                            //     }
                            //     return "";
                            // });
                        }

                        if (d.dirtyStatus) {
                            if (!showStatus || !d.status) {
                                thisNode.selectAll(".red-ui-flow-node-status-group").style("display","none");
                            } else {
                                thisNode.selectAll(".red-ui-flow-node-status-group").style("display","inline");
                                var fill = status_colours[d.status.fill]; // Only allow our colours for now
                                if (d.status.shape == null && fill == null) {
                                    thisNode.selectAll(".red-ui-flow-node-status").style("display","none");
                                    thisNode.selectAll(".red-ui-flow-node-status-group").attr("transform","translate(-14,"+(d.h+3)+")");
                                } else {
                                    thisNode.selectAll(".red-ui-flow-node-status-group").attr("transform","translate(3,"+(d.h+3)+")");
                                    var statusClass = "red-ui-flow-node-status-"+(d.status.shape||"dot")+"-"+d.status.fill;
                                    thisNode.selectAll(".red-ui-flow-node-status").style("display","inline").attr("class","red-ui-flow-node-status "+statusClass);
                                }
                                if (d.status.hasOwnProperty('text')) {
                                    thisNode.selectAll(".red-ui-flow-node-status-label").text(d.status.text);
                                } else {
                                    thisNode.selectAll(".red-ui-flow-node-status-label").text("");
                                }
                            }
                            delete d.dirtyStatus;
                        }

                        d.dirty = false;
                        if (d.g) {
                            if (!dirtyGroups[d.g]) {
                                var gg = d.g;
                                while (gg && !dirtyGroups[gg]) {
                                    dirtyGroups[gg] = RED.nodes.group(gg);
                                    gg = dirtyGroups[gg].g;
                                }
                            }
                        //     var group = dirtyGroups[d.g];
                        //     group.x = Math.min(group.x,d.x-d.w/2-25-((d._def.button && d._def.align!=="right")?20:0));
                        //     group.y = Math.min(group.y,d.y-d.h/2-25),
                        //     group.w = Math.max(group.w, d.x+d.w/2+25+((d._def.button && d._def.align=="right")?20:0) - group.x),
                        //     group.h = Math.max(group.h, d.y+d.h/2+25 - group.y)
                        }
                    }
            });

            var link = linkLayer.selectAll(".red-ui-flow-link").data(
                activeLinks,
                function(d) {
                    return d.source.id+":"+d.sourcePort+":"+d.target.id+":"+d.target.i;
                }
            );
            var linkEnter = link.enter().insert("g",".red-ui-flow-node").attr("class","red-ui-flow-link");

            linkEnter.each(function(d,i) {
                var l = d3.select(this);
                d.added = true;
                l.append("svg:path").attr("class","red-ui-flow-link-background red-ui-flow-link-path")
                   .classed("red-ui-flow-link-link", function(d) { return d.link })
                   .on("mousedown",function(d) {
                       if (mouse_mode === RED.state.SELECTING_NODE) {
                           d3.event.stopPropagation();
                           return;
                       }
                        mousedown_link = d;
                        clearSelection();
                        selected_link = mousedown_link;
                        updateSelection();
                        redraw();
                        focusView();
                        d3.event.stopPropagation();
                        if (d3.event.metaKey || d3.event.ctrlKey) {
                            l.classed("red-ui-flow-link-splice",true);
                            var point = d3.mouse(this);
                            var clickedGroup = getGroupAt(point[0],point[1]);
                            showQuickAddDialog(point, selected_link, clickedGroup);
                        }
                    })
                    .on("touchstart",function(d) {
                        if (mouse_mode === RED.state.SELECTING_NODE) {
                            d3.event.stopPropagation();
                            return;
                        }
                        mousedown_link = d;
                        clearSelection();
                        selected_link = mousedown_link;
                        updateSelection();
                        redraw();
                        focusView();
                        d3.event.stopPropagation();

                        var obj = d3.select(document.body);
                        var touch0 = d3.event.touches.item(0);
                        var pos = [touch0.pageX,touch0.pageY];
                        touchStartTime = setTimeout(function() {
                            touchStartTime = null;
                            showTouchMenu(obj,pos);
                        },touchLongPressTimeout);
                    })
                l.append("svg:path").attr("class","red-ui-flow-link-outline red-ui-flow-link-path");
                l.append("svg:path").attr("class","red-ui-flow-link-line red-ui-flow-link-path")
                    .classed("red-ui-flow-link-link", function(d) { return d.link })
                    .classed("red-ui-flow-subflow-link", function(d) { return !d.link && activeSubflow });
            });

            link.exit().remove();
            var links = linkLayer.selectAll(".red-ui-flow-link-path");
            links.each(function(d) {
                var link = d3.select(this);
                if (d.added || d===selected_link || d.selected || dirtyNodes[d.source.id] || dirtyNodes[d.target.id]) {
                    if (/red-ui-flow-link-line/.test(link.attr('class'))) {
                        link.classed("red-ui-flow-subflow-link", function(d) { return !d.link && activeSubflow });
                    }
                    link.attr("d",function(d){
                        var numOutputs = d.source.outputs || 1;
                        var sourcePort = d.sourcePort || 0;
                        var y = -((numOutputs-1)/2)*13 +13*sourcePort;
                        d.x1 = d.source.x+d.source.w/2;
                        d.y1 = d.source.y+y;
                        d.x2 = d.target.x-d.target.w/2;
                        d.y2 = d.target.y;

                        // return "M "+d.x1+" "+d.y1+
                        //     " C "+(d.x1+scale*node_width)+" "+(d.y1+scaleY*node_height)+" "+
                        //     (d.x2-scale*node_width)+" "+(d.y2-scaleY*node_height)+" "+
                        //     d.x2+" "+d.y2;
                        var path = generateLinkPath(d.x1,d.y1,d.x2,d.y2,1);
                        if (/NaN/.test(path)) {
                            return ""
                        }
                        return path;
                    });
                    link.classed("red-ui-flow-node-disabled", function(d) { return d.source.d || d.target.d; });
                }
            })

            link.classed("red-ui-flow-link-selected", function(d) { return d === selected_link || d.selected; });
            link.classed("red-ui-flow-link-unknown",function(d) {
                delete d.added;
                return d.target.type == "unknown" || d.source.type == "unknown"
            });
            var offLinks = linkLayer.selectAll(".red-ui-flow-link-off-flow").data(
                activeFlowLinks,
                function(d) {
                    return d.node.id+":"+d.refresh
                }
            );

            var offLinksEnter = offLinks.enter().insert("g",".red-ui-flow-node").attr("class","red-ui-flow-link-off-flow");
            offLinksEnter.each(function(d,i) {
                var g = d3.select(this);
                var s = 1;
                var labelAnchor = "start";
                if (d.node.type === "link in") {
                    s = -1;
                    labelAnchor = "end";
                }
                var stemLength = s*30;
                var branchLength = s*20;
                var l = g.append("svg:path").attr("class","red-ui-flow-link-link").attr("d","M 0 0 h "+stemLength);
                var links = d.links;
                var flows = Object.keys(links);
                var tabOrder = RED.nodes.getWorkspaceOrder();
                flows.sort(function(A,B) {
                    return tabOrder.indexOf(A) - tabOrder.indexOf(B);
                });
                var linkWidth = 10;
                var h = node_height;
                var y = -(flows.length-1)*h/2;
                var linkGroups = g.selectAll(".red-ui-flow-link-group").data(flows);
                var enterLinkGroups = linkGroups.enter().append("g").attr("class","red-ui-flow-link-group")
                        .on('mouseover', function() { if (mouse_mode !== 0) { return } d3.select(this).classed('red-ui-flow-link-group-active',true)})
                        .on('mouseout', function() {if (mouse_mode !== 0) { return } d3.select(this).classed('red-ui-flow-link-group-active',false)})
                        .on('mousedown', function() { d3.event.preventDefault(); d3.event.stopPropagation(); })
                        .on('mouseup', function(f) {
                            if (mouse_mode !== 0) {
                                return
                            }
                            d3.event.stopPropagation();
                            var targets = d.links[f];
                            RED.workspaces.show(f);
                            targets.forEach(function(n) {
                                n.selected = true;
                                n.dirty = true;
                                moving_set.push({n:n});
                            });
                            updateSelection();
                            redraw();
                        });
                enterLinkGroups.each(function(f) {
                    var linkG = d3.select(this);
                    linkG.append("svg:path")
                        .attr("class","red-ui-flow-link-link")
                        .attr("d",
                            "M "+stemLength+" 0 "+
                            "C "+(stemLength+(1.7*branchLength))+" "+0+
                            " "+(stemLength+(0.1*branchLength))+" "+y+" "+
                            (stemLength+branchLength*1.5)+" "+y+" "
                        );
                    linkG.append("svg:path")
                        .attr("class","red-ui-flow-link-port")
                        .attr("d",
                            "M "+(stemLength+branchLength*1.5+s*(linkWidth+7))+" "+(y-12)+" "+
                            "h "+(-s*linkWidth)+" "+
                            "a 3 3 45 0 "+(s===1?"0":"1")+" "+(s*-3)+" 3 "+
                            "v 18 "+
                            "a 3 3 45 0 "+(s===1?"0":"1")+" "+(s*3)+" 3 "+
                            "h "+(s*linkWidth)
                        );
                    linkG.append("svg:path")
                        .attr("class","red-ui-flow-link-port")
                        .attr("d",
                            "M "+(stemLength+branchLength*1.5+s*(linkWidth+10))+" "+(y-12)+" "+
                            "h "+(s*(linkWidth*3))+" "+
                            "M "+(stemLength+branchLength*1.5+s*(linkWidth+10))+" "+(y+12)+" "+
                            "h "+(s*(linkWidth*3))
                        ).style("stroke-dasharray","12 3 8 4 3");
                    linkG.append("rect").attr("class","red-ui-flow-port red-ui-flow-link-port")
                        .attr("x",stemLength+branchLength*1.5-4+(s*4))
                        .attr("y",y-4)
                        .attr("rx",2)
                        .attr("ry",2)
                        .attr("width",8)
                        .attr("height",8);
                    linkG.append("rect")
                        .attr("x",stemLength+branchLength*1.5-(s===-1?node_width:0))
                        .attr("y",y-12)
                        .attr("width",node_width)
                        .attr("height",24)
                        .style("stroke","none")
                        .style("fill","transparent")
                    var tab = RED.nodes.workspace(f);
                    var label;
                    if (tab) {
                        label = tab.label || tab.id;
                    }
                    linkG.append("svg:text")
                        .attr("class","red-ui-flow-port-label")
                        .attr("x",stemLength+branchLength*1.5+(s*15))
                        .attr("y",y+1)
                        .style("font-size","10px")
                        .style("text-anchor",labelAnchor)
                        .text(label);

                    y += h;
                });
                linkGroups.exit().remove();
            });
            offLinks.exit().remove();
            offLinks = linkLayer.selectAll(".red-ui-flow-link-off-flow");
            offLinks.each(function(d) {
                var s = 1;
                if (d.node.type === "link in") {
                    s = -1;
                }
                var link = d3.select(this);
                link.attr("transform", function(d) { return "translate(" + (d.node.x+(s*d.node.w/2)) + "," + (d.node.y) + ")"; });

            })


            var group = groupLayer.selectAll(".red-ui-flow-group").data(activeGroups,function(d) { return d.id });
            group.exit().remove();
            var groupEnter = group.enter().insert("svg:g")
                .attr("class", "red-ui-flow-group")

            groupEnter.each(function(d,i) {
                var g = d3.select(this);

                // g.append('path').classed("red-ui-flow-group-handle red-ui-flow-group-handle-0",true).style({
                //     "fill":"white",
                //     "stroke": "#ff7f0e",
                //     "stroke-width": 2
                // }).attr("d","m -5 6 v -2 q 0 -9 9 -9 h 2 v 11 z")
                //
                // g.append('path').classed("red-ui-flow-group-handle red-ui-flow-group-handle-1",true).style({
                //     "fill": "white",
                //     "stroke": "#ff7f0e",
                //     "stroke-width": 2
                // }).attr("d","m -6 -5 h 2 q 9 0 9 9 v 2 h -11 z")
                //
                // g.append('path').classed("red-ui-flow-group-handle red-ui-flow-group-handle-2",true).style({
                //     "fill": "white",
                //     "stroke": "#ff7f0e",
                //     "stroke-width": 2
                // }).attr("d","m 5 -6 v 2 q 0 9 -9 9 h -2 v -11 z")
                //
                // g.append('path').classed("red-ui-flow-group-handle red-ui-flow-group-handle-3",true).style({
                //     "fill": "white",
                //     "stroke": "#ff7f0e",
                //     "stroke-width": 2
                // }).attr("d","m 6 5 h -2 q -9 0 -9 -9 v -2 h 11 z")



                g.append('rect').classed("red-ui-flow-group-outline",true)
                    .attr('rx',1).attr('ry',1).style({
                        "fill":"none",
                        "stroke": "#ff7f0e",
                        "pointer-events": "stroke",
                        "stroke-opacity": 0,
                        "stroke-width": 15
                    })

                g.append('rect').classed("red-ui-flow-group-body",true)
                    .attr('rx',1).attr('ry',1).style({
                        "pointer-events": "none",
                        "fill":d.fill||"none",
                        "stroke": d.stroke||"none",
                        "stroke-width": 2
                    })
                g.on("mousedown",groupMouseDown).on("mouseup",groupMouseUp)

                d.dirty = true;
            });
            group.each(function(d,i) {
                if (d.dirty || dirtyGroups[d.id]) {
                    var g = d3.select(this);
                    var minX = Number.POSITIVE_INFINITY;
                    var minY = Number.POSITIVE_INFINITY;
                    var maxX = 0;
                    var maxY = 0;
                    d.nodes.forEach(function(n) {
                        if (n.type !== "group") {
                            minX = Math.min(minX,n.x-n.w/2-25-((n._def.button && n._def.align!=="right")?20:0));
                            minY = Math.min(minY,n.y-n.h/2-25);
                            maxX = Math.max(maxX,n.x+n.w/2+25+((n._def.button && n._def.align=="right")?20:0));
                            maxY = Math.max(maxY,n.y+n.h/2+25);
                        } else {
                            minX = Math.min(minX,n.x-25)
                            minY = Math.min(minY,n.y-25)
                            maxX = Math.max(maxX,n.x+n.w+25)
                            maxY = Math.max(maxY,n.y+n.h+25)
                        }
                    });

                    d.x = minX;
                    d.y = minY;
                    d.w = maxX - minX;
                    d.h = maxY - minY;

                    g.attr("transform","translate("+d.x+","+d.y+")");
                    g.selectAll(".red-ui-flow-group-outline")
                        .attr("width",d.w)
                        .attr("height",d.h)
                        .style("stroke-opacity",function(d) { if (d.selected) { return 0.3 } return 0});

                    g.selectAll(".red-ui-flow-group-body")
                        .attr("width",d.w)
                        .attr("height",d.h)
                        .style("stroke",function(d) { /*if (d.selected) { return "#ff7f0e" } */return d.style.stroke || "none"})
                        .style("stroke-dasharray", function(d) { return (d.active||d.hovered)?"10 4":"none"})
                        .style("fill", function(d) { return d.style.fill || "none"})
                        .style("fill-opacity", 0.1)

                    // g.selectAll(".red-ui-flow-group-handle-0")
                    //     .style("opacity",function(d) { return d.selected?1:0})
                    // g.selectAll(".red-ui-flow-group-handle-1")
                    //     .attr("transform","translate("+(maxX-minX)+",0)")
                    //     .style("opacity",function(d) { return d.selected?1:0})
                    // g.selectAll(".red-ui-flow-group-handle-2")
                    //     .attr("transform","translate("+(maxX-minX)+","+(maxY-minY)+")")
                    //     .style("opacity",function(d) { return d.selected?1:0})
                    // g.selectAll(".red-ui-flow-group-handle-3")
                    //     .attr("transform","translate(0,"+(maxY-minY)+")")
                    //     .style("opacity",function(d) { return d.selected?1:0})


                    delete dirtyGroups[d.id];
                    delete d.dirty;
                }
            })


        } else {
            // JOINING - unselect any selected links
            linkLayer.selectAll(".red-ui-flow-link-selected").data(
                activeLinks,
                function(d) {
                    return d.source.id+":"+d.sourcePort+":"+d.target.id+":"+d.target.i;
                }
            ).classed("red-ui-flow-link-selected", false);
        }
        RED.view.navigator.refresh();
        if (d3.event) {
            d3.event.preventDefault();
        }

    }

    function focusView() {
        try {
            // Workaround for browser unexpectedly scrolling iframe into full
            // view - record the parent scroll position and restore it after
            // setting the focus
            var scrollX = window.parent.window.scrollX;
            var scrollY = window.parent.window.scrollY;
            chart.trigger("focus");
            window.parent.window.scrollTo(scrollX,scrollY);
        } catch(err) {
            // In case we're iframed into a page of a different origin, just focus
            // the view following the inevitable DOMException
            chart.trigger("focus");
        }
    }

    /**
     * Imports a new collection of nodes from a JSON String.
     *  - all get new IDs assigned
     *  - all "selected"
     *  - attached to mouse for placing - "IMPORT_DRAGGING"
     */
    function importNodes(newNodesStr,addNewFlow,touchImport) {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            return;
        }
        try {
            var activeSubflowChanged;
            if (activeSubflow) {
                activeSubflowChanged = activeSubflow.changed;
            }
            var result = RED.nodes.import(newNodesStr,true,addNewFlow);
            if (result) {
                var new_nodes = result[0];
                var new_links = result[1];
                var new_workspaces = result[2];
                var new_subflows = result[3];
                var new_default_workspace = result[4];
                if (addNewFlow && new_default_workspace) {
                    RED.workspaces.show(new_default_workspace.id);
                }
                var new_ms = new_nodes.filter(function(n) { return n.hasOwnProperty("x") && n.hasOwnProperty("y") && n.z == RED.workspaces.active() }).map(function(n) { return {n:n};});
                var new_node_ids = new_nodes.map(function(n){ n.changed = true; return n.id; });

                // TODO: pick a more sensible root node
                if (new_ms.length > 0) {
                    var root_node = new_ms[0].n;
                    var dx = root_node.x;
                    var dy = root_node.y;

                    if (mouse_position == null) {
                        mouse_position = [0,0];
                    }

                    var minX = 0;
                    var minY = 0;
                    var i;
                    var node;

                    for (i=0;i<new_ms.length;i++) {
                        node = new_ms[i];
                        node.n.selected = true;
                        node.n.changed = true;
                        node.n.moved = true;
                        node.n.x -= dx - mouse_position[0];
                        node.n.y -= dy - mouse_position[1];
                        node.dx = node.n.x - mouse_position[0];
                        node.dy = node.n.y - mouse_position[1];
                        minX = Math.min(node.n.x-node_width/2-5,minX);
                        minY = Math.min(node.n.y-node_height/2-5,minY);
                    }
                    for (i=0;i<new_ms.length;i++) {
                        node = new_ms[i];
                        node.n.x -= minX;
                        node.n.y -= minY;
                        node.dx -= minX;
                        node.dy -= minY;
                        if (node.n._def.onadd) {
                            try {
                                node.n._def.onadd.call(node.n);
                            } catch(err) {
                                console.log("Definition error: "+node.n.type+".onadd:",err);
                            }
                        }

                    }
                    if (!touchImport) {
                        mouse_mode = RED.state.IMPORT_DRAGGING;
                        spliceActive = false;
                        if (new_ms.length === 1) {
                            node = new_ms[0];
                            spliceActive = node.n.hasOwnProperty("_def") &&
                                           node.n._def.inputs > 0 &&
                                           node.n._def.outputs > 0;
                        }
                    }
                    RED.keyboard.add("*","escape",function(){
                            RED.keyboard.remove("escape");
                            clearSelection();
                            RED.history.pop();
                            mouse_mode = 0;
                    });
                    clearSelection();
                    moving_set = new_ms;
                }

                var historyEvent = {
                    t:"add",
                    nodes:new_node_ids,
                    links:new_links,
                    workspaces:new_workspaces,
                    subflows:new_subflows,
                    dirty:RED.nodes.dirty()
                };
                if (new_ms.length === 0) {
                    RED.nodes.dirty(true);
                }
                if (activeSubflow) {
                    var subflowRefresh = RED.subflow.refresh(true);
                    if (subflowRefresh) {
                        historyEvent.subflow = {
                            id:activeSubflow.id,
                            changed: activeSubflowChanged,
                            instances: subflowRefresh.instances
                        }
                    }
                }
                RED.history.push(historyEvent);

                updateActiveNodes();
                redraw();

                var counts = [];
                var newNodeCount = 0;
                var newConfigNodeCount = 0;
                new_nodes.forEach(function(n) {
                    if (n.hasOwnProperty("x") && n.hasOwnProperty("y")) {
                        newNodeCount++;
                    } else {
                        newConfigNodeCount++;
                    }
                })
                if (new_workspaces.length > 0) {
                    counts.push(RED._("clipboard.flow",{count:new_workspaces.length}));
                }
                if (newNodeCount > 0) {
                    counts.push(RED._("clipboard.node",{count:newNodeCount}));
                }
                if (newConfigNodeCount > 0) {
                    counts.push(RED._("clipboard.configNode",{count:newNodeCount}));
                }
                if (new_subflows.length > 0) {
                    counts.push(RED._("clipboard.subflow",{count:new_subflows.length}));
                }
                if (counts.length > 0) {
                    var countList = "<ul><li>"+counts.join("</li><li>")+"</li></ul>";
                    RED.notify("<p>"+RED._("clipboard.nodesImported")+"</p>"+countList,{id:"clipboard"});
                }

            }
        } catch(error) {
            if (error.code != "NODE_RED") {
                console.log(error.stack);
                RED.notify(RED._("notification.error",{message:error.toString()}),"error");
            } else {
                RED.notify(RED._("notification.error",{message:error.message}),"error");
            }
        }
    }

    function toggleShowGrid(state) {
        if (state) {
            gridLayer.style("visibility","visible");
        } else {
            gridLayer.style("visibility","hidden");
        }
    }
    function toggleSnapGrid(state) {
        snapGrid = state;
        redraw();
    }
    function toggleStatus(s) {
        showStatus = s;
        RED.nodes.eachNode(function(n) { n.dirtyStatus = true; n.dirty = true;});
        //TODO: subscribe/unsubscribe here
        redraw();
    }
    function setSelectedNodeState(isDisabled) {
        if (mouse_mode === RED.state.SELECTING_NODE) {
            return;
        }
        var workspaceSelection = RED.workspaces.selection();
        var changed = false;
        if (workspaceSelection.length > 0) {
            // TODO: toggle workspace state
        } else if (moving_set.length > 0) {
            var historyEvents = [];
            for (var i=0;i<moving_set.length;i++) {
                var node = moving_set[i].n;
                if (isDisabled != node.d) {
                    historyEvents.push({
                        t: "edit",
                        node: node,
                        changed: node.changed,
                        changes: {
                            d: node.d
                        }
                    });
                    if (isDisabled) {
                        node.d = true;
                    } else {
                        delete node.d;
                    }
                    node.dirty = true;
                    node.changed = true;
                }
            }
            if (historyEvents.length > 0) {
                RED.history.push({
                    t:"multi",
                    events: historyEvents,
                    dirty:RED.nodes.dirty()
                })
                RED.nodes.dirty(true)
            }
        }
        RED.view.redraw();

    }

    return {
        init: init,
        state:function(state) {
            if (state == null) {
                return mouse_mode
            } else {
                mouse_mode = state;
            }
        },

        redraw: function(updateActive) {
            if (updateActive) {
                updateActiveNodes();
                updateSelection();
            }
            redraw();
        },
        focus: focusView,
        importNodes: importNodes,
        calculateTextWidth: calculateTextWidth,
        select: function(selection) {
            if (typeof selection !== "undefined") {
                clearSelection();
                if (typeof selection == "string") {
                    var selectedNode = RED.nodes.node(selection);
                    if (selectedNode) {
                        selectedNode.selected = true;
                        selectedNode.dirty = true;
                        moving_set = [{n:selectedNode}];
                    }
                } else if (selection) {
                    if (selection.groups) {
                        updateActiveNodes();
                        selection.groups.forEach(function(g) {
                            selectGroup(g,true);
                        })
                    }
                }
            }
            updateSelection();
            redraw(true);
        },
        selection: function() {
            var selection = {};

            var allNodes = new Set();

            if (moving_set.length > 0) {
                moving_set.forEach(function(n) {
                    allNodes.add(n.n);
                });
            }
            var selectedGroups =  activeGroups.filter(function(g) { return g.selected });
            if (selectedGroups.length > 0) {
                if (selectedGroups.length === 1 && selectedGroups[0].active) {
                    // Let nodes be nodes
                } else {
                    selectedGroups.forEach(function(g) {
                        var groupNodes = RED.group.getNodes(g,true);
                        groupNodes.forEach(function(n) {
                            allNodes.delete(n);
                        });
                        allNodes.add(g);
                    });
                }
            }
            if (allNodes.size > 0) {
                selection.nodes = Array.from(allNodes);
            }
            if (selected_link != null) {
                selection.link = selected_link;
            }
            return selection;
        },
        scale: function() {
            return scaleFactor;
        },
        getLinksAtPoint: function(x,y) {
            var result = [];
            var links = outer.selectAll(".red-ui-flow-link-background")[0];
            for (var i=0;i<links.length;i++) {
                var bb = links[i].getBBox();
                if (x >= bb.x && y >= bb.y && x <= bb.x+bb.width && y <= bb.y+bb.height) {
                    result.push(links[i])
                }
            }
            return result;
        },
        reveal: function(id) {
            if (RED.nodes.workspace(id) || RED.nodes.subflow(id)) {
                RED.workspaces.show(id);
            } else {
                var node = RED.nodes.node(id);
                if (node._def.category !== 'config' && node.z) {
                    node.highlighted = true;
                    node.dirty = true;
                    RED.workspaces.show(node.z);

                    var screenSize = [chart.width()/scaleFactor,chart.height()/scaleFactor];
                    var scrollPos = [chart.scrollLeft()/scaleFactor,chart.scrollTop()/scaleFactor];

                    if (node.x < scrollPos[0] || node.y < scrollPos[1] || node.x > screenSize[0]+scrollPos[0] || node.y > screenSize[1]+scrollPos[1]) {
                        var deltaX = '-='+(((scrollPos[0] - node.x) + screenSize[0]/2)*scaleFactor);
                        var deltaY = '-='+(((scrollPos[1] - node.y) + screenSize[1]/2)*scaleFactor);
                        chart.animate({
                            scrollLeft: deltaX,
                            scrollTop: deltaY
                        },200);
                    }

                    if (!node._flashing) {
                        node._flashing = true;
                        var flash = 22;
                        var flashFunc = function() {
                            flash--;
                            node.dirty = true;
                            if (flash >= 0) {
                                node.highlighted = !node.highlighted;
                                setTimeout(flashFunc,100);
                            } else {
                                node.highlighted = false;
                                delete node._flashing;
                            }
                            RED.view.redraw();
                        }
                        flashFunc();
                    }
                } else if (node._def.category === 'config') {
                    RED.sidebar.config.show(id);
                }
            }
        },
        gridSize: function(v) {
            if (v === undefined) {
                return gridSize;
            } else {
                gridSize = Math.max(5,v);
                updateGrid();
            }
        },
        getActiveNodes: function() {
            return activeNodes;
        },
        selectNodes: function(options) {
            $("#red-ui-workspace-tabs-shade").show();
            $("#red-ui-palette-shade").show();
            $("#red-ui-sidebar-shade").show();
            $("#red-ui-header-shade").show();
            $("#red-ui-workspace").addClass("red-ui-workspace-select-mode");

            mouse_mode = RED.state.SELECTING_NODE;
            clearSelection();
            if (options.selected) {
                console.log(options.selected);
                options.selected.forEach(function(id) {
                    var n = RED.nodes.node(id);
                    if (n) {
                        n.selected = true;
                        n.dirty = true;
                        moving_set.push({n:n});
                    }
                })
            }
            redraw();
            selectNodesOptions = options||{};
            var closeNotification = function() {
                clearSelection();
                $("#red-ui-workspace-tabs-shade").hide();
                $("#red-ui-palette-shade").hide();
                $("#red-ui-sidebar-shade").hide();
                $("#red-ui-header-shade").hide();
                $("#red-ui-workspace").removeClass("red-ui-workspace-select-mode");
                resetMouseVars();
                notification.close();
            }
            selectNodesOptions.done = function(selection) {
                closeNotification();
                if (selectNodesOptions.onselect) {
                    selectNodesOptions.onselect(selection);
                }
            }
            var buttons = [{
                text: RED._("common.label.cancel"),
                click: function(e) {
                    closeNotification();
                    if (selectNodesOptions.oncancel) {
                        selectNodesOptions.oncancel();
                    }
                }
            }];
            if (!selectNodesOptions.single) {
                buttons.push({
                    text: RED._("common.label.done"),
                    class: "primary",
                    click: function(e) {
                        var selection = moving_set.map(function(n) { return n.n;});
                        selectNodesOptions.done(selection);
                    }
                });
            }
            var notification = RED.notify(selectNodesOptions.prompt || RED._("workspace.selectNodes"),{
                modal: false,
                fixed: true,
                type: "compact",
                buttons: buttons
            })
        },
        scroll: function(x,y) {
            chart.scrollLeft(chart.scrollLeft()+x);
            chart.scrollTop(chart.scrollTop()+y)
        }
    };
})();