add gicons to menu openDrawingSubMenu items

area.js

@@ -1102,6 +1102,27 @@ var DrawingArea = new Lang.Class({
             this.savePersistent();
     },
     
+    // Used by the menu.
+    getSvgContentForJson(json) {
+        let elements = [];
+        
+        elements.push(...JSON.parse(json.contents).map(object => {
+            if (object.image)
+                object.image = new Files.Image(object.image);
+            return new Elements.DrawingElement(object);
+        }));
+        
+        let size = Math.min(this.monitor.width, this.monitor.height);
+        let [x, y] = [(this.monitor.width - size) / 2, (this.monitor.height - size) / 2];
+        
+        let prefixes = 'xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"';
+        let content = `<svg viewBox="${x} ${y} ${size} ${size}" ${prefixes}>`;
+        elements.forEach(element => content += element.buildSVG('transparent'));
+        content += "\n</svg>";
+        
+        return content;
+    },
+    
     saveAsSvg: function() {
         // stop drawing or writing
         if (this.currentElement && this.currentElement.shape == Shapes.TEXT && this.isWriting) {
@@ -1124,9 +1145,7 @@ var DrawingArea = new Lang.Class({
             content += `\n  <line stroke="black" x1="0" y1="${-this.height}" x2="0" y2="${this.height}"/>`;
             content += `\n  <line stroke="black" x1="${-this.width}" y1="0" x2="${this.width}" y2="0"/>`;
         }
-        for (let i = 0; i < this.elements.length; i++) {
-            content += this.elements[i].buildSVG(backgroundColorString);
-        }
+        this.elements.forEach(element => content += element.buildSVG(backgroundColorString));
         content += "\n</svg>";
         
         if (Files.saveSvg(content)) {

files.js

@@ -388,6 +388,11 @@ var Json = new Lang.Class({
         }
         
         this._contents = contents;
+    },
+    
+    createGicon: function(content) {
+        let bytes = new GLib.Bytes(content);
+        this.gicon = Gio.BytesIcon.new(bytes);
     }
 });
 
@@ -521,7 +526,7 @@ var saveSvg = function(content) {
         return false;
     
     try {
-        return file.replace_contents(content, null, false, Gio.FileCreateFlags.NONE, null);
+        return file.replace_contents(content, null, false, Gio.FileCreateFlags.NONE, null)[0];
     } catch(e) {
         return false;
     }

menu.js

@@ -591,13 +591,18 @@ var DrawingMenu = new Lang.Class({
     
     _populateOpenDrawingSubMenu: function() {
         this.openDrawingSubMenu.removeAll();
-        let jsons = Files.Jsons.getSorted();
-        jsons.forEach(json => {
+        Files.Jsons.getSorted().forEach(json => {
+            if (!json.gicon) {
+                let svgContent = this.area.getSvgContentForJson(json);
+                json.createGicon(svgContent);
+            }
+            
             let subItem = this.openDrawingSubMenu.addAction(`<i>${String(json)}</i>`, () => {
                 this.area.loadJson(json);
                 this._updateDrawingNameMenuItem();
                 this._updateSaveDrawingSubMenuItemSensitivity();
-            });
+            }, json.gicon);
+            
             subItem.label.get_clutter_text().set_use_markup(true);
             getActor(subItem).connect('key-focus-in', updateSubMenuAdjustment);