add support for inline image drag and drop to markdown editor

packages/node_modules/@node-red/editor-client/locales/en-US/editor.json

@@ -53,6 +53,7 @@
         "confirmDelete": "Confirm delete",
         "delete": "Are you sure you want to delete '__label__'?",
         "dropFlowHere": "Drop the flow here",
+        "dropImageHere": "Drop the image here",
         "addFlow": "Add flow",
         "addFlowToRight": "Add flow to the right",
         "hideFlow": "Hide flow",

packages/node_modules/@node-red/editor-client/locales/ja/editor.json

@@ -53,6 +53,7 @@
         "confirmDelete": "削除の確認",
         "delete": "本当に '__label__' を削除しますか？",
         "dropFlowHere": "ここにフローをドロップしてください",
+        "dropImageHere": "ここに画像ファイルをドロップしてください",
         "addFlow": "フローの追加",
         "addFlowToRight": "右側にフローを追加",
         "hideFlow": "フローを非表示",

packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editor.js

@@ -45,6 +45,9 @@
             selectedCodeEditor = RED.editor.codeEditor[defaultEditor];
             initialised = selectedCodeEditor.init();
         }
+
+        $('<div id="red-ui-image-drop-target"><div data-i18n="[append]workspace.dropImageHere"><i class="fa fa-download"></i><br></div></div>').appendTo('#red-ui-editor');
+        $("#red-ui-image-drop-target").hide();
     }
 
     function create(options) {
@@ -64,6 +67,7 @@
             options = {};
         }
 
+        var editor = null;
         if (this.editor.type === MONACO) {
             // compatibility (see above note)
             if (!options.element && !options.id) {
@@ -74,10 +78,14 @@
                 console.warn("createEditor() options.element or options.id is not valid", options);
                 $("#dialog-form").append('<div id="' + options.id + '" style="display: none;" />');
             }
-            return this.editor.create(options);
+            editor = this.editor.create(options);
         } else {
-            return this.editor.create(options);//fallback to ACE
+            editor = this.editor.create(options);//fallback to ACE
         }
+        if (options.mode === "ace/mode/markdown") {
+            RED.editor.customEditTypes['_markdown'].postInit(editor, options);
+        }
+        return editor;
     }
 
     return {

packages/node_modules/@node-red/editor-client/src/js/ui/editors/markdown.js

@@ -14,6 +14,55 @@
  * limitations under the License.
  **/
 (function() {
+    /**
+     * Converts dropped image file to date URL
+     */
+    function file2base64Image(file, cb) {
+        var reader = new FileReader();
+        reader.onload = (function (fd) {
+            return function (e) {
+                cb(e.target.result);
+            };
+        })(file);
+        reader.readAsDataURL(file);
+    }
+
+    var initialized = false;
+    var currentEditor = null;
+    /**
+     * Initialize handler for image file drag events
+     */
+    function initImageDrag(elem, editor) {
+        $(elem).on("dragenter", function (ev) {
+            ev.preventDefault();
+            $("#red-ui-image-drop-target").css({display:'table'}).focus();
+            currentEditor = editor;
+        });
+
+        if (!initialized) {
+            initialized = true;
+            $("#red-ui-image-drop-target").on("dragover", function (ev) {
+                ev.preventDefault();
+            }).on("dragleave", function (ev) {
+                $("#red-ui-image-drop-target").hide();
+            }).on("drop", function (ev) {
+                ev.preventDefault();
+                if ($.inArray("Files",ev.originalEvent.dataTransfer.types) != -1) {
+                    var files = ev.originalEvent.dataTransfer.files;
+                    if (files.length === 1) {
+                        var file = files[0];
+                        var image = file2base64Image(file, function (image) {
+                            var session = currentEditor.getSession();
+                            var img = `<img src="${image}"/>\n`;
+                            var pos = session.getCursorPosition();
+                            session.insert(pos, img);
+                            $("#red-ui-image-drop-target").hide();
+                        });
+                    }
+                }
+            });
+        }
+    }
 
     var toolbarTemplate = '<div style="margin-bottom: 5px">'+
         '<span class="button-group">'+
@@ -148,10 +197,14 @@
                     });
                     RED.popover.tooltip($("#node-btn-markdown-preview"), RED._("markdownEditor.toggle-preview"));
 
-                    if (options.cursor && !expressionEditor._initState) {
+                    if(!expressionEditor._initState) {
-                        expressionEditor.gotoLine(options.cursor.row+1,options.cursor.column,false);
+                        if (options.cursor) {
-                    }
+                            expressionEditor.gotoLine(options.cursor.row+1,options.cursor.column,false);
-
+                        }
+                        else {
+                            expressionEditor.gotoLine(0, 0, false);
+                        }
+                    }                        
                     dialogForm.i18n();
                 },
                 close: function() {
@@ -215,7 +268,11 @@
                 }
             })
             return toolbar;
-        }
+        },
+        postInit: function (editor, options) {
+            var elem = $("#"+options.id);
+            initImageDrag(elem, editor);
+         }
     }
     RED.editor.registerTypeEditor("_markdown", definition);
 })();

packages/node_modules/@node-red/editor-client/src/sass/dragdrop.scss

@@ -37,3 +37,27 @@
         }
     }
 }
+
+#red-ui-image-drop-target {
+    position: absolute;
+    top: 0; bottom: 0;
+    left: 0; right: 0;
+    background: var(--red-ui-dnd-background);
+    display:table;
+    width: 100%;
+    height: 100%;
+    display: none;
+    z-index:100;
+    div {
+        pointer-events: none;
+        display: table-cell;
+        vertical-align: middle;
+        text-align: center;
+        font-size: 40px;
+        color: var(--red-ui-dnd-color);
+        i {
+            pointer-events: none;
+            font-size: 80px;
+        }
+    }
+}