MDL-44798 editor_atto: Backport a fix for HTML5Shiv

This is a backport of the Rangy workaround for a bug in HTML5Shiv, which
breaks document.createElement by returning nodes which have parent nodes.

HTML5Shiv refuses to fix this bug so Rangy has had to work around it.

For more information see:
* https://code.google.com/p/rangy/issues/detail?id=104; and
* aFarkas/html5shiv#64.

lib/editor/atto/readme_moodle.txt

@@ -0,0 +1,10 @@
+Description of the import of libraries associated with the Atto editor.
+
+1)  Rangy (version 1.2.3)
+    * Download the latest stable release;
+    * Copy the content of the 'currentrelease/uncompressed' folder into yui/src/rangy/js
+    * Run shifter against yui/src/rangy
+
+    Notes:
+    * We have patched 1.2.3 with a backport fix from the next release of Rangy which addresses an incompatibility
+      between Rangy and HTML5Shiv which is used in the bootstrapclean theme. See MDL-44798 for further information.

lib/editor/atto/yui/build/moodle-editor_atto-rangy/moodle-editor_atto-rangy-debug.js

@@ -1937,6 +1937,11 @@ rangy.createModule("DomUtil", function(api, module) {
         }
 
         var workingNode = dom.getDocument(containerElement).createElement("span");
+        // Workaround for HTML5 Shiv's insane violation of document.createElement(). See Rangy issue 104 and HTML5
+        // Shiv issue 64: https://github.com/aFarkas/html5shiv/issues/64
+        if (workingNode.parentNode) {
+            workingNode.parentNode.removeChild(workingNode);
+        }
         var comparison, workingComparisonType = isStart ? "StartToStart" : "StartToEnd";
         var previousNode, nextNode, boundaryPosition, boundaryNode;
 

lib/editor/atto/yui/build/moodle-editor_atto-rangy/moodle-editor_atto-rangy.js

@@ -1937,6 +1937,11 @@ rangy.createModule("DomUtil", function(api, module) {
         }
 
         var workingNode = dom.getDocument(containerElement).createElement("span");
+        // Workaround for HTML5 Shiv's insane violation of document.createElement(). See Rangy issue 104 and HTML5
+        // Shiv issue 64: https://github.com/aFarkas/html5shiv/issues/64
+        if (workingNode.parentNode) {
+            workingNode.parentNode.removeChild(workingNode);
+        }
         var comparison, workingComparisonType = isStart ? "StartToStart" : "StartToEnd";
         var previousNode, nextNode, boundaryPosition, boundaryNode;
 

lib/editor/atto/yui/src/rangy/js/rangy-core.js

@@ -1937,6 +1937,11 @@ rangy.createModule("DomUtil", function(api, module) {
         }
 
         var workingNode = dom.getDocument(containerElement).createElement("span");
+        // Workaround for HTML5 Shiv's insane violation of document.createElement(). See Rangy issue 104 and HTML5
+        // Shiv issue 64: https://github.com/aFarkas/html5shiv/issues/64
+        if (workingNode.parentNode) {
+            workingNode.parentNode.removeChild(workingNode);
+        }
         var comparison, workingComparisonType = isStart ? "StartToStart" : "StartToEnd";
         var previousNode, nextNode, boundaryPosition, boundaryNode;