[FIX] web_editor: properly not allow edition of non editable parts

Before this commit, (double) clicking an image/link in a non editable
environment still opened a dialog / change the editor bar for edition.

addons/web_editor/static/src/js/editor/rte.js

@@ -569,7 +569,7 @@ var RTEWidget = Widget.extend({
         var $target = $(ev.target);
         var $editable = $target.closest('.o_editable');
 
-        if (!$editable.length) {
+        if (!$editable.length || $.summernote.core.dom.isContentEditableFalse($target)) {
             return;
         }
 
@@ -604,8 +604,7 @@ var RTEWidget = Widget.extend({
             }, 150); // setTimeout to remove flickering when change to editable zone (re-create an editor)
             this.$last = null;
         }
-        if ($editable.length && (!this.$last || this.$last[0] !== $editable[0]) &&
-                ($target.closest('[contenteditable]').attr('contenteditable') || '').toLowerCase() !== 'false') {
+        if ($editable.length && (!this.$last || this.$last[0] !== $editable[0])) {
             $editable.summernote(this._getConfig($editable));
 
             $editable.data('NoteHistory', history);

addons/web_editor/static/src/js/editor/rte.summernote.js

@@ -771,7 +771,7 @@ eventHandler.attach = function (oLayoutInfo, options) {
         });
     }
     oLayoutInfo.editable().on('mousedown', function (e) {
-        if (dom.isImg(e.target)) {
+        if (dom.isImg(e.target) && dom.isContentEditable(e.target)) {
             range.createFromNode(e.target).select();
         }
     });
@@ -836,7 +836,12 @@ eventHandler.attach = function (oLayoutInfo, options) {
         var show_tooltip = true;
 
         oLayoutInfo.editor().on("dblclick", selector, function (e) {
-            if ($(e.target).closest(".note-toolbar").length) return; // prevent icon edition of top bar for default summernote
+            var $target = $(e.target);
+            if (!dom.isContentEditable($target)) {
+                // Prevent edition of non editable parts
+                return;
+            }
+
             show_tooltip = false;
             callback();
             e.stopImmediatePropagation();
@@ -844,7 +849,11 @@ eventHandler.attach = function (oLayoutInfo, options) {
 
         oLayoutInfo.editor().on("click", selector, function (e) {
             var $target = $(e.target);
-            if ($target.closest(".note-toolbar").length) return; // prevent icon edition of top bar for default summernote
+            if (!dom.isContentEditable($target)) {
+                // Prevent edition of non editable parts
+                return;
+            }
+
             show_tooltip = true;
             setTimeout(function () {
                 if (!show_tooltip) return;

addons/web_editor/static/src/js/editor/summernote.js

@@ -649,7 +649,10 @@ dom.isNotBreakable = function (node) {
     return !dom.isText(node) && !dom.isBR(dom.firstChild(node)) && dom.isVoid(dom.firstChild(node));
 };
 dom.isContentEditable = function (node) {
-    return $(node).closest('[contenteditable]').is('[contenteditable="true"]');
+    return $(node).closest('[contenteditable]').prop('contenteditable') === 'true';
+};
+dom.isContentEditableFalse = function (node) {
+    return $(node).closest('[contenteditable]').prop('contenteditable') === 'false';
 };
 dom.isFont = function (node) {
     var nodeName = node && node.nodeName.toUpperCase();