TinyMCE: add support for IE11.

- Add the latest changes from the 3.x branch upstream.
- Reduce the number of calls to tinyMCEPopup.restoreSelection() in our custom plugins.
- Remove the deprecated execCommand("mceBeginUndoLevel");.
See #25281.
Built from https://develop.svn.wordpress.org/trunk@25748


git-svn-id: http://core.svn.wordpress.org/trunk@25661 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/tinymce/plugins/wpdialogs/js/popup.js

@@ -172,8 +172,9 @@ var tinyMCEPopup = {
 	restoreSelection : function() {
 		var t = tinyMCEPopup;
 
-		if (!t.isWindow && tinymce.isIE)
+		if (!t.isWindow && tinymce.isIE) {
 			t.editor.selection.moveToBookmark(t.editor.windowManager.bookmark);
+		}
 	},
 
 	/**
@@ -280,11 +281,12 @@ var tinyMCEPopup = {
 
 	// Internal functions
 
-	_restoreSelection : function() {
-		var e = window.event.srcElement;
+	_restoreSelection : function(e) {
+		var el = e && e.target ? e.target : window.event.srcElement;
 
-		if (e.nodeName == 'INPUT' && (e.type == 'submit' || e.type == 'button'))
+		if ( el.nodeName == 'INPUT' && ( el.type == 'submit' || el.type == 'button' ) ) {
 			tinyMCEPopup.restoreSelection();
+		}
 	},
 
 /*	_restoreSelection : function() {
@@ -325,11 +327,13 @@ var tinyMCEPopup = {
 		document.body.style.display = '';
 
 		// Restore selection in IE when focus is placed on a non textarea or input element of the type text
-		if (tinymce.isIE) {
+		if ( tinymce.isIE && ! tinymce.isIE11 ) {
 			document.attachEvent('onmouseup', tinyMCEPopup._restoreSelection);
 
 			// Add base target element for it since it would fail with modal dialogs
 			t.dom.add(t.dom.select('head')[0], 'base', {target : '_self'});
+		} else if ( tinymce.isIE11 ) {
+			document.addEventListener('mouseup', tinyMCEPopup._restoreSelection, false);
 		}
 
 		t.restoreSelection();

wp-includes/js/tinymce/plugins/wpeditimage/js/editimage.js

@@ -497,7 +497,7 @@ wpImage = {
 			ed.selection.moveToBookmark(b);
 		}
 
-		tinyMCEPopup.execCommand("mceEndUndoLevel");
+		ed.execCommand("mceEndUndoLevel");
 		ed.execCommand('mceRepaint');
 		tinyMCEPopup.close();
 	},