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node-red/editor/js/ui/keyboard.js

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/**
* Copyright 2013 IBM Corp.
*
* 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.
**/
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RED.keyboard = (function() {
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var handlers = {};
var partialState;
var keyMap = {
"left":37,
"up":38,
"right":39,
"down":40,
"escape":27,
"enter": 13,
"backspace": 8,
"delete": 46,
"space": 32,
";":186,
"=":187,
",":188,
"-":189,
".":190,
"/":191,
"\\":220,
"'":222,
"?":191 // <- QWERTY specific
}
var metaKeyCodes = {
16:true,
17:true,
18: true,
91:true,
93: true
}
var actionToKeyMap = {}
// FF generates some different keycodes because reasons.
var firefoxKeyCodeMap = {
59:186,
61:187,
173:189
}
function init() {
$.getJSON("red/keymap.json",function(data) {
for (var scope in data) {
if (data.hasOwnProperty(scope)) {
var keys = data[scope];
for (var key in keys) {
if (keys.hasOwnProperty(key)) {
addHandler(scope,key,keys[key]);
}
}
}
}
})
RED.actions.add("core:show-help", showKeyboardHelp);
}
function parseKeySpecifier(key) {
var parts = key.toLowerCase().split("-");
var modifiers = {};
var keycode;
var blank = 0;
for (var i=0;i<parts.length;i++) {
switch(parts[i]) {
case "ctrl":
case "cmd":
modifiers.ctrl = true;
modifiers.meta = true;
break;
case "alt":
modifiers.alt = true;
break;
case "shift":
modifiers.shift = true;
break;
case "":
blank++;
keycode = keyMap["-"];
break;
default:
if (keyMap.hasOwnProperty(parts[i])) {
keycode = keyMap[parts[i]];
} else if (parts[i].length > 1) {
return null;
} else {
keycode = parts[i].toUpperCase().charCodeAt(0);
}
break;
}
}
return [keycode,modifiers];
}
function resolveKeyEvent(evt) {
var slot = partialState||handlers;
if (evt.ctrlKey || evt.metaKey) {
slot = slot.ctrl;
}
if (slot && evt.shiftKey) {
slot = slot.shift;
}
if (slot && evt.altKey) {
slot = slot.alt;
}
var keyCode = firefoxKeyCodeMap[evt.keyCode] || evt.keyCode;
if (slot && slot[keyCode]) {
var handler = slot[keyCode];
if (!handler.scope) {
if (partialState) {
partialState = null;
return resolveKeyEvent(evt);
} else {
partialState = handler;
evt.preventDefault();
return null;
}
} else if (handler.scope && handler.scope !== "*") {
var target = evt.target;
while (target.nodeName !== 'BODY' && target.id !== handler.scope) {
target = target.parentElement;
}
if (target.nodeName === 'BODY') {
handler = null;
}
}
partialState = null;
return handler;
} else if (partialState) {
partialState = null;
return resolveKeyEvent(evt);
}
}
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d3.select(window).on("keydown",function() {
if (metaKeyCodes[d3.event.keyCode]) {
return;
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}
var handler = resolveKeyEvent(d3.event);
if (handler && handler.ondown) {
if (typeof handler.ondown === "string") {
RED.actions.invoke(handler.ondown);
} else {
handler.ondown();
}
d3.event.preventDefault();
}
});
function addHandler(scope,key,modifiers,ondown) {
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var mod = modifiers;
var cbdown = ondown;
if (typeof modifiers == "function" || typeof modifiers === "string") {
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mod = {};
cbdown = modifiers;
}
var keys = [];
var i=0;
if (typeof key === 'string') {
if (typeof cbdown === 'string') {
actionToKeyMap[cbdown] = {scope:scope,key:key};
}
var parts = key.split(" ");
for (i=0;i<parts.length;i++) {
var parsedKey = parseKeySpecifier(parts[i]);
if (parsedKey) {
keys.push(parsedKey);
} else {
console.log("Unrecognised key specifier:",key)
return;
}
}
} else {
keys.push([key,mod])
}
var slot = handlers;
for (i=0;i<keys.length;i++) {
key = keys[i][0];
mod = keys[i][1];
if (mod.ctrl) {
slot.ctrl = slot.ctrl||{};
slot = slot.ctrl;
}
if (mod.shift) {
slot.shift = slot.shift||{};
slot = slot.shift;
}
if (mod.alt) {
slot.alt = slot.alt||{};
slot = slot.alt;
}
slot[key] = slot[key] || {};
slot = slot[key];
//slot[key] = {scope: scope, ondown:cbdown};
}
slot.scope = scope;
slot.ondown = cbdown;
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}
function removeHandler(key,modifiers) {
var mod = modifiers || {};
var keys = [];
var i=0;
if (typeof key === 'string') {
delete actionToKeyMap[key];
var parts = key.split(" ");
for (i=0;i<parts.length;i++) {
var parsedKey = parseKeySpecifier(parts[i]);
if (parsedKey) {
keys.push(parsedKey);
} else {
console.log("Unrecognised key specifier:",key)
return;
}
}
} else {
keys.push([key,mod])
}
var slot = handlers;
for (i=0;i<keys.length;i++) {
key = keys[i][0];
mod = keys[i][1];
if (mod.ctrl) {
slot = slot.ctrl;
}
if (slot && mod.shift) {
slot = slot.shift;
}
if (slot && mod.alt) {
slot = slot.alt;
}
if (!slot[key]) {
return;
}
slot = slot[key];
}
delete slot.scope;
delete slot.ondown;
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}
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var dialog = null;
var isMac = /Mac/i.test(window.navigator.platform);
var cmdCtrlKey = '<span class="help-key">'+(isMac?'&#8984;':'Ctrl')+'</span>';
function showKeyboardHelp() {
if (!RED.settings.theme("menu.menu-item-keyboard-shortcuts",true)) {
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return;
}
if (!dialog) {
dialog = $('<div id="keyboard-help-dialog" class="hide">'+
'<div style="vertical-align: top;display:inline-block; box-sizing: border-box; width:50%; padding: 10px;">'+
'<table class="keyboard-shortcuts">'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">a</span></td><td>'+RED._("keyboard.selectAll")+'</td></tr>'+
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'<tr><td><span class="help-key">Shift</span> + <span class="help-key">Click</span></td><td>'+RED._("keyboard.selectAllConnected")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">Click</span></td><td>'+RED._("keyboard.addRemoveNode")+'</td></tr>'+
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'<tr><td>&nbsp;</td><td></td></tr>'+
'<tr><td><span class="help-key">Enter</span></td><td>'+RED._("keyboard.editSelected")+'</td></tr>'+
'<tr><td><span class="help-key">Delete</span> / <span class="help-key">Backspace</span></td><td>'+RED._("keyboard.deleteSelected")+'</td></tr>'+
'<tr><td>&nbsp;</td><td></td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">i</span></td><td>'+RED._("keyboard.importNode")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">e</span></td><td>'+RED._("keyboard.exportNode")+'</td></tr>'+
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'</table>'+
'</div>'+
'<div style="vertical-align: top;display:inline-block; box-sizing: border-box; width:50%; padding: 10px;">'+
'<table class="keyboard-shortcuts">'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">Space</span></td><td>'+RED._("keyboard.toggleSidebar")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">f</span></td><td>'+RED._("keyboard.searchBox")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">Shift</span> + <span class="help-key">p</span></td><td>'+RED._("keyboard.managePalette")+'</td></tr>'+
'<tr><td>&nbsp;</td><td></td></tr>'+
'<tr><td><span class="help-key">&#x2190;</span> <span class="help-key">&#x2191;</span> <span class="help-key">&#x2192;</span> <span class="help-key">&#x2193;</span></td><td>'+RED._("keyboard.nudgeNode")+'</td></tr>'+
'<tr><td><span class="help-key">Shift</span> + <span class="help-key">&#x2190;</span> <span class="help-key">&#x2191;</span> <span class="help-key">&#x2192;</span> <span class="help-key">&#x2193;</span></td><td>'+RED._("keyboard.moveNode")+'</td></tr>'+
'<tr><td>&nbsp;</td><td></td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">c</span></td><td>'+RED._("keyboard.copyNode")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">x</span></td><td>'+RED._("keyboard.cutNode")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">v</span></td><td>'+RED._("keyboard.pasteNode")+'</td></tr>'+
'<tr><td>'+cmdCtrlKey+' + <span class="help-key">z</span></td><td>'+RED._("keyboard.undoChange")+'</td></tr>'+
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'</table>'+
'</div>'+
'</div>')
.appendTo("body")
.dialog({
modal: true,
autoOpen: false,
width: "800",
title:"Keyboard shortcuts",
resizable: false
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});
}
dialog.dialog("open");
}
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return {
init: init,
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add: addHandler,
remove: removeHandler,
getShortcut: function(actionName) {
return actionToKeyMap[actionName];
}
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}
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})();