DevTools: Allow general editing of author shadow DOM elements

LayoutTests/inspector/elements/edit-dom-test.js

+function initialize_EditDOMTests()
+{
+
+InspectorTest.doAddAttribute = function(testName, dataNodeId, attributeText, next)
+{
+    InspectorTest.domActionTestForNodeId(testName, dataNodeId, testBody, next);
+
+    function testBody(node, done)
+    {
+        var editorElement = InspectorTest.editNodePart(node, "webkit-html-attribute");
+        editorElement.dispatchEvent(InspectorTest.createKeyEvent("U+0009")); // Tab
+
+        InspectorTest.runAfterPendingDispatches(testContinuation);
+
+        function testContinuation()
+        {
+            var editorElement = window.getSelection().anchorNode.parentElement;
+            editorElement.textContent = attributeText;
+            editorElement.dispatchEvent(InspectorTest.createKeyEvent("Enter"));
+            InspectorTest.addSniffer(WebInspector.ElementsTreeUpdater.prototype, "_updateModifiedNodes", done);
+        }
+    }
+}
+
+InspectorTest.domActionTestForNodeId = function(testName, dataNodeId, testBody, next)
+{
+    function callback(testNode, continuation)
+    {
+        InspectorTest.selectNodeWithId(dataNodeId, continuation);
+    }
+    InspectorTest.domActionTest(testName, callback, testBody, next);
+}
+
+InspectorTest.domActionTest = function(testName, dataNodeSelectionCallback, testBody, next)
+{
+    var testNode = InspectorTest.expandedNodeWithId(testName);
+    InspectorTest.addResult("==== before ====");
+    InspectorTest.dumpElementsTree(testNode);
+
+    dataNodeSelectionCallback(testNode, step0);
+
+    function step0(node)
+    {
+        InspectorTest.runAfterPendingDispatches(step1.bind(null, node));
+    }
+
+    function step1(node)
+    {
+        testBody(node, step2);
+    }
+
+    function step2()
+    {
+        InspectorTest.addResult("==== after ====");
+        InspectorTest.dumpElementsTree(testNode);
+        next();
+    }
+}
+
+InspectorTest.editNodePart = function(node, className)
+{
+    var treeElement = WebInspector.panels.elements.treeOutline.findTreeElement(node);
+    var textElement = treeElement.listItemElement.getElementsByClassName(className)[0];
+    if (!textElement && treeElement.childrenListElement)
+        textElement = treeElement.childrenListElement.getElementsByClassName(className)[0];
+    treeElement._startEditingTarget(textElement);
+    return textElement;
+}
+
+InspectorTest.editNodePartAndRun = function(node, className, newValue, step2, useSniffer)
+{
+    var editorElement = InspectorTest.editNodePart(node, className);
+    editorElement.textContent = newValue;
+    editorElement.dispatchEvent(InspectorTest.createKeyEvent("Enter"));
+    if (useSniffer)
+        InspectorTest.addSniffer(WebInspector.ElementsTreeUpdater.prototype, "_updateModifiedNodes", step2);
+    else
+        InspectorTest.runAfterPendingDispatches(step2);
+}
+
+}