better support for contenteditables in iframes (ckeditor, tinymce, etc)

src/completer.js

@@ -78,7 +78,8 @@
       throw new Error('textcomplete must be called on a Textarea or a ContentEditable.');
     }
 
-    if (element === document.activeElement) {
+    // use ownerDocument to fix iframe / IE issues
+    if (element === element.ownerDocument.activeElement) {
       // element has already been focused. Initialize view objects immediately.
       this.initialize()
     } else {
@@ -109,12 +110,26 @@
     adapter:    null,
     dropdown:   null,
     $el:        null,
+    $iframe:    null,
 
     // Public methods
     // --------------
 
     initialize: function () {
       var element = this.$el.get(0);
+
+      // check if we are in an iframe
+      // we need to alter positioning logic if using an iframe
+      if (this.$el.prop('ownerDocument') !== document && window.frames.length) {
+        for (var iframeIndex = 0; iframeIndex < window.frames.length; iframeIndex++) {
+          if (this.$el.prop('ownerDocument') === window.frames[iframeIndex].document) {
+            this.$iframe = $(window.frames[iframeIndex].frameElement);
+            break;
+          }
+        }
+      }
+
+
       // Initialize view objects.
       this.dropdown = new $.fn.textcomplete.Dropdown(element, this, this.option);
       var Adapter, viewName;

src/content_editable.js

@@ -21,7 +21,9 @@
     // When an dropdown item is selected, it is executed.
     select: function (value, strategy, e) {
       var pre = this.getTextFromHeadToCaret();
-      var sel = window.getSelection()
+      // use ownerDocument instead of window to support iframes
+      var sel = this.el.ownerDocument.getSelection();
+
       var range = sel.getRangeAt(0);
       var selection = range.cloneRange();
       selection.selectNodeContents(range.startContainer);
@@ -38,13 +40,13 @@
         range.deleteContents();
 
         // create temporary elements
-        var preWrapper = document.createElement("div");
+        var preWrapper = this.el.ownerDocument.createElement("div");
         preWrapper.innerHTML = pre;
-        var postWrapper = document.createElement("div");
+        var postWrapper = this.el.ownerDocument.createElement("div");
         postWrapper.innerHTML = post;
 
         // create the fragment thats inserted
-        var fragment = document.createDocumentFragment();
+        var fragment = this.el.ownerDocument.createDocumentFragment();
         var childNode;
         var lastOfPre;
         while (childNode = preWrapper.firstChild) {
@@ -77,8 +79,8 @@
     //
     // Dropdown's position will be decided using the result.
     _getCaretRelativePosition: function () {
-      var range = window.getSelection().getRangeAt(0).cloneRange();
-      var node = document.createElement('span');
+      var range = this.el.ownerDocument.getSelection().getRangeAt(0).cloneRange();
+      var node = this.el.ownerDocument.createElement('span');
       range.insertNode(node);
       range.selectNodeContents(node);
       range.deleteContents();
@@ -87,6 +89,17 @@
       position.left -= this.$el.offset().left;
       position.top += $node.height() - this.$el.offset().top;
       position.lineHeight = $node.height();
+
+      // special positioning logic for iframes
+      // this is typically used for contenteditables such as tinymce or ckeditor
+      if (this.completer.$iframe) {
+        var iframePosition = this.completer.$iframe.offset();
+        position.top += iframePosition.top;
+        position.left += iframePosition.left;
+        //subtract scrollTop from element in iframe
+        position.top -= this.$el.scrollTop(); 
+      }
+
       $node.remove();
       return position;
     },
@@ -100,7 +113,7 @@
     //   this.getTextFromHeadToCaret()
     //   // => ' wor'  // not '<b>hello</b> wor'
     getTextFromHeadToCaret: function () {
-      var range = window.getSelection().getRangeAt(0);
+      var range = this.el.ownerDocument.getSelection().getRangeAt(0);
       var selection = range.cloneRange();
       selection.selectNodeContents(range.startContainer);
       return selection.toString().substring(0, range.startOffset);

src/dropdown.js

@@ -455,7 +455,10 @@
       var windowScrollBottom = $window.scrollTop() + $window.height();
       var height = this.$el.height();
       if ((this.$el.position().top + height) > windowScrollBottom) {
-        this.$el.offset({top: windowScrollBottom - height});
+        // only do this if we are not in an iframe
+        if (!this.completer.$iframe) {
+          this.$el.offset({top: windowScrollBottom - height});
+        }
       }
     },