MDL-42366 assignfeedback_editpdf: Improve meaningfulness of cursor image

Various improvements to make the cursor image more accurately reflect
the currently selected editing tool or action:
 * Replace crosshair with default cursor for read-only student view
 * Use currently selected stamp image as cursor when using stamp tool
 * Use text cursor for text higlighter tool and improve its accuracy
 * Use default cursor for select tool (as indicated by its button icon)

mod/assign/feedback/editpdf/styles.css

@@ -10,7 +10,6 @@
     position: relative;
     min-width: 817px;
     min-height: 400px;
-    cursor: crosshair;
     background-repeat: no-repeat;
     background-color: #ccc;
     margin-left: auto;
@@ -22,14 +21,6 @@
     position: inherit;
 }
 
-.assignfeedback_editpdf_widget .drawingregion[data-currenttool=drag] .drawingcanvas {
-    cursor: move;
-}
-
-.assignfeedback_editpdf_widget .drawingregion[data-currenttool=select] .drawingcanvas {
-    cursor: default;
-}
-
 .assignfeedback_editpdf_widget .drawingregion[data-currenttool=select] .commentdrawable textarea,
 .assignfeedback_editpdf_widget .drawingregion[data-currenttool=select] .commentdrawable svg {
     cursor: move;

mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-debug.js

@@ -1478,13 +1478,13 @@ Y.extend(ANNOTATIONHIGHLIGHT, M.assignfeedback_editpdf.annotation, {
         shape = this.editor.graphic.addShape({
             type: Y.Rect,
             width: bounds.width,
-            height: 16,
+            height: 20,
             stroke: false,
             fill: {
                color: highlightcolour
             },
             x: bounds.x,
-            y: edit.start.y
+            y: edit.start.y - 10
         });
 
         drawable.shapes.push(shape);
@@ -1507,9 +1507,9 @@ Y.extend(ANNOTATIONHIGHLIGHT, M.assignfeedback_editpdf.annotation, {
         this.gradeid = this.editor.get('gradeid');
         this.pageno = this.editor.currentpage;
         this.x = bounds.x;
-        this.y = edit.start.y;
+        this.y = edit.start.y - 10;
         this.endx = bounds.x + bounds.width;
-        this.endy = edit.start.y + 16;
+        this.endy = edit.start.y + 10;
         this.colour = edit.annotationcolour;
         this.page = '';
 
@@ -3539,7 +3539,7 @@ EDITOR.prototype = {
      * @method refresh_button_state
      */
     refresh_button_state: function() {
-        var button, currenttoolnode, imgurl, drawingregion;
+        var button, currenttoolnode, imgurl, drawingregion, stampimgurl, drawingcanvas;
 
         // Initalise the colour buttons.
         button = this.get_dialogue_element(SELECTOR.COMMENTCOLOURBUTTON);
@@ -3564,9 +3564,28 @@ EDITOR.prototype = {
         drawingregion.setAttribute('data-currenttool', this.currentedit.tool);
 
         button = this.get_dialogue_element(SELECTOR.STAMPSBUTTON);
-        button.one('img').setAttrs({'src': this.get_stamp_image_url(this.currentedit.stamp),
+        stampimgurl = this.get_stamp_image_url(this.currentedit.stamp);
+        button.one('img').setAttrs({'src': stampimgurl,
                                     'height': '16',
                                     'width': '16'});
+
+        drawingcanvas = this.get_dialogue_element(SELECTOR.DRAWINGCANVAS);
+        switch (this.currentedit.tool) {
+            case 'drag':
+                drawingcanvas.setStyle('cursor', 'move');
+                break;
+            case 'highlight':
+                drawingcanvas.setStyle('cursor', 'text');
+                break;
+            case 'select':
+                drawingcanvas.setStyle('cursor', 'default');
+                break;
+            case 'stamp':
+                drawingcanvas.setStyle('cursor', 'url(' + stampimgurl + '), crosshair');
+                break;
+            default:
+                drawingcanvas.setStyle('cursor', 'crosshair');
+        }
     },
 
     /**