Add ARIA panel to accessibility sidebar pane

third_party/WebKit/Source/devtools/front_end/accessibility/ARIAAttributesView.js

Index: third_party/WebKit/Source/devtools/front_end/accessibility/ARIAAttributesView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/accessibility/ARIAAttributesView.js b/third_party/WebKit/Source/devtools/front_end/accessibility/ARIAAttributesView.js
new file mode 100644
index 0000000000000000000000000000000000000000..c5f19c058a5534f2c94afe81da5a4bfc68dd9a76
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/front_end/accessibility/ARIAAttributesView.js
@@ -0,0 +1,316 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @constructor
+ * @extends {WebInspector.AccessibilitySubPane}
+ */
+WebInspector.AXARIAAttributesSubPane = function()

[dgozman, 2016/07/18 22:38:19]

ARIAAttributesPane

[aboxhall, 2016/07/19 17:20:54]

Done.

+{
+    WebInspector.AccessibilitySubPane.call(this, WebInspector.UIString("ARIA Attributes"));
+
+    this._noPropertiesInfo = this.createInfo(WebInspector.UIString("No ARIA attributes"));
+    this._treeOutline = this.createTreeOutline();
+};
+
+
+WebInspector.AXARIAAttributesSubPane.prototype = {
+    /**
+     * @override
+     * @param {?WebInspector.DOMNode} node
+     */
+    setNode: function(node)
+    {
+        WebInspector.AccessibilitySubPane.prototype.setNode.call(this, node);
+        this._treeOutline.removeChildren();
+        if (!this.node())
+            return;
+        var target = this.node().target();
+        var foundARIAAttr = false;

[dgozman, 2016/07/18 22:38:19]

Avoid abbreviations: attr -> attribute. I'd call this just |foundAttributes| or
|found|.

[aboxhall, 2016/07/19 17:20:54]

Done.

+        var attributes = node.attributes();
+        for (var i = 0; i < attributes.length; ++i) {
+            var attribute = attributes[i];
+            if (WebInspector.AXARIAAttributesSubPane.ARIAAttributes.indexOf(attribute.name) < 0)
+                continue;
+            this._treeOutline.appendChild(new WebInspector.ARIAAttributesTreeElement(this, attribute, target));
+            foundARIAAttr = true;
+        }
+
+        if (foundARIAAttr) {

[dgozman, 2016/07/18 22:38:20]

Can just check |this._treeOutline.rootElement().childCount()|.

[aboxhall, 2016/07/19 17:20:53]

Done.

+            this._noPropertiesInfo.classList.add("hidden");
+            this._treeOutline.element.classList.remove("hidden");
+        } else {
+            this._noPropertiesInfo.classList.remove("hidden");
+            this._treeOutline.element.classList.add("hidden");

[dgozman, 2016/07/18 22:38:19]

Use toggle instead:
this._treeOutline.element.classList.toggle("hidden", !foundARIAAttr);

[aboxhall, 2016/07/19 17:20:54]

Nice, TIL. Done.

+        }
+    },
+
+    __proto__: WebInspector.AccessibilitySubPane.prototype
+};
+
+/**
+ * @constructor
+ * @extends {WebInspector.AXNodePropertyTreeElement}
+ * @param {!WebInspector.AXARIAAttributesSubPane} parentPane
+ * @param {!Object} attribute

[dgozman, 2016/07/18 22:38:19]

Let's make it a typedef. I've found that DOMNode.attributes() has incorrect
annotation (it returns an array). Could you please add a typedef for
DOMNode.Attribute (with name and value) and use it here?

[aboxhall, 2016/07/19 17:20:53]

Done.

+ * @param {!WebInspector.Target} target
+ */
+WebInspector.ARIAAttributesTreeElement = function(parentPane, attribute, target)
+{
+    WebInspector.AXNodePropertyTreeElement.call(this, target);
+
+    this._parentPane = parentPane;
+    this._attribute = attribute;
+};
+
+WebInspector.ARIAAttributesTreeElement.prototype = {
+    /**
+     * @override
+     */
+    onattach: function()
+    {
+        this._populateListItem();
+        this.listItemElement.addEventListener("click", this._mouseClick.bind(this));
+    },
+
+    _populateListItem: function() {

[dgozman, 2016/07/18 22:38:20]

{ on next line

[aboxhall, 2016/07/19 17:20:54]

Done.

+        this.listItemElement.removeChildren();
+        this.appendNameElement(this._attribute.name);
+        this.listItemElement.createChild("span", "separator").textContent = ":\u00A0";
+        this.appendAttributeValueElement(this._attribute.value);
+    },
+
+    /**
+     * @override
+     * @param {string} name
+     */
+    appendNameElement: function(name)
+    {
+        this.nameElement = createElement("span");

[dgozman, 2016/07/18 22:38:20]

_nameElement

[aboxhall, 2016/07/19 17:20:54]

Done.

+        this.nameElement.textContent = name;
+        this.nameElement.classList.add("ax-name");
+        this.nameElement.classList.add("monospace");
+        this.listItemElement.appendChild(this.nameElement);
+    },
+
+    /**
+     * @param {string} value
+     * @return {?Element}

[dgozman, 2016/07/18 22:38:19]

- !Element
- Is it used at all? Let's not return anything.

[aboxhall, 2016/07/19 17:20:54]

Done.

+     */
+    appendAttributeValueElement: function(value)
+    {
+        this.valueElement = WebInspector.ARIAAttributesTreeElement.createARIAValueElement(value);

[dgozman, 2016/07/18 22:38:19]

_valueElement

[aboxhall, 2016/07/19 17:20:53]

Done.

+        this.listItemElement.appendChild(this.valueElement);
+        return this.valueElement;
+    },
+
+    _mouseClick: function(event)

[dgozman, 2016/07/18 22:38:20]

Annotate please.

[aboxhall, 2016/07/19 17:20:54]

Done.

+    {
+        event.consume(true);
+
+        if (event.target === this.listItemElement)
+            return;
+
+        this.startEditing();
+    },
+
+    startEditing: function()

[dgozman, 2016/07/18 22:38:19]

All these editing methods should be private.

[aboxhall, 2016/07/19 17:20:54]

Done.

+    {
+        var valueElement = this.valueElement;
+
+        if (WebInspector.isBeingEdited(valueElement))
+            return;
+
+        var previousContent = valueElement.textContent;
+
+        if (valueElement.parentElement)
+            valueElement.parentElement.classList.add("child-editing");
+
+        /**
+         * @param {string} previousContent
+         * @param {!Event} event
+         * @this {WebInspector.ARIAAttributesTreeElement}
+         */
+        function blurListener(previousContent, event)
+        {
+            var text = event.target.textContent;
+            text = this.value || text;

[dgozman, 2016/07/18 22:38:20]

What is |this.value| ?

[aboxhall, 2016/07/19 17:20:54]

Ugh, should have been this._attribute.value, but I actually don't think it does
anything; removed this line.

+            this.editingCommitted(text, previousContent);
+        }
+
+        this._prompt = new WebInspector.AXARIAAttributesSubPane.ARIAAttributePrompt(this);
+        this._prompt.setAutocompletionTimeout(0);
+        var proxyElement = this._prompt.attachAndStartEditing(valueElement, blurListener.bind(this, previousContent));
+
+        proxyElement.addEventListener("keydown", this._editingValueKeyDown.bind(this, previousContent), false);
+
+        valueElement.getComponentSelection().setBaseAndExtent(valueElement, 0, valueElement, 1);
+    },
+
+    _removePrompt: function()
+    {
+        if (!this._prompt)
+            return;
+        this._prompt.detach();
+        delete this._prompt;
+    },
+

[dgozman, 2016/07/18 22:38:19]

nit: extra blank line

[aboxhall, 2016/07/19 17:20:53]

Done.

+
+    /**
+     * @param {string} userInput
+     * @param {string} previousContent
+     */
+    editingCommitted: function(userInput, previousContent)
+    {
+        this._removePrompt();
+        this.editingEnded();
+
+        // Make the changes to the attribute
+        if (userInput !== previousContent) {
+            var newText = this._attribute.name + '="' + userInput + '"';
+            this._parentPane.node().setAttribute(this._attribute.name, newText);

[dgozman, 2016/07/18 22:38:19]

Let's use setAttributeValue to not craft html here.

[aboxhall, 2016/07/19 17:20:54]

Done.

+        }
+    },
+
+    editingEnded: function()
+    {
+        var editedElement = this.valueElement;
+        // The proxyElement has been deleted, no need to remove listener.
+        if (editedElement.parentElement)
+            editedElement.parentElement.classList.remove("child-editing");

[dgozman, 2016/07/18 22:38:20]

Is "child-editing" used anywhere?

[aboxhall, 2016/07/19 17:20:54]

Hm, doesn't look like it.

+    },
+
+    editingCancelled: function()
+    {
+        this._removePrompt();
+        this._populateListItem();
+        this.editingEnded();
+    },
+
+    /**
+     * @param {string} previousContent
+     * @param {!Event} event
+     */
+    _editingValueKeyDown: function(previousContent, event)
+    {
+        if (event.handled)
+            return;
+
+        var result;
+
+        if (isEnterKey(event)) {
+            result = "commit";
+            event.preventDefault();
+        } else if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Esc.code || event.keyIdentifier === "U+001B") {
+            result = "cancel";
+        }
+
+        if (result) {
+            switch (result) {
+            case "cancel":
+                this.editingCancelled();

[dgozman, 2016/07/18 22:38:19]

Just call this instead of |result = "commit"|.

[aboxhall, 2016/07/19 17:20:54]

Done.

+                break;
+            case "commit":
+                this.editingCommitted(event.target.textContent, result);

[dgozman, 2016/07/18 22:38:19]

Same for cancel.

[aboxhall, 2016/07/19 17:20:54]

Done.

+                break;
+            }
+
+            event.consume();

[dgozman, 2016/07/18 22:38:20]

And consume in both cases. Note: consume(true) will also preventDefault
automatically.

[aboxhall, 2016/07/19 17:20:53]

Done.

+            return;
+        }
+    },
+
+    __proto__: WebInspector.AXNodePropertyTreeElement.prototype
+};
+
+/**
+ * @param {string} value
+ * @return {!Element}
+ */
+WebInspector.ARIAAttributesTreeElement.createARIAValueElement = function(value)
+{
+    var valueElement = createElementWithClass("span", "monospace");
+    // TODO(aboxhall): quotation marks?
+    valueElement.setTextContentTruncatedIfNeeded(value || "");
+    return valueElement;
+};
+
+/**
+ * @constructor
+ * TODO: completions; see StylesSidebarPane.js
+ * @extends {WebInspector.TextPrompt}
+ * @param {!WebInspector.ARIAAttributesTreeElement} treeElement
+ */
+WebInspector.AXARIAAttributesSubPane.ARIAAttributePrompt = function(treeElement)
+{
+    WebInspector.TextPrompt.call(this, this._buildPropertyCompletions.bind(this));
+
+    this._treeElement = treeElement;
+};
+
+WebInspector.AXARIAAttributesSubPane.ARIAAttributePrompt.prototype = {
+    /**
+     * @param {!Element} proxyElement
+     * @param {string} text
+     * @param {number} cursorOffset
+     * @param {!Range} wordRange
+     * @param {boolean} force
+     * @param {function(!Array.<string>, number=)} completionsReadyCallback
+     */
+    _buildPropertyCompletions: function(proxyElement, text, cursorOffset, wordRange, force, completionsReadyCallback)
+    {
+        // TODO(aboxhall): replace placeholder implementation with real implementation
+
+        var prefix = wordRange.toString().toLowerCase();

[dgozman, 2016/07/18 22:38:20]

Let's remove this code for now, until we have an implementation. Just call the
callback with an empty array.

[aboxhall, 2016/07/19 17:20:54]

Done.

+        if (!prefix && !force && (proxyElement.textContent.length)) {
+            completionsReadyCallback([]);
+            return;
+        }
+
+        var results = [];
+        completionsReadyCallback(results, 0);
+    },
+
+    __proto__: WebInspector.TextPrompt.prototype
+}
+
+
+WebInspector.AXARIAAttributesSubPane.ARIAAttributes = [

[dgozman, 2016/07/18 22:38:20]

WebInspector.ARIAAttributesPane._attributes

[aboxhall, 2016/07/19 17:20:54]

Done.

+    "role",
+    "aria-busy",
+    "aria-checked",
+    "aria-disabled",
+    "aria-expanded",
+    "aria-grabbed",
+    "aria-hidden",
+    "aria-invalid",
+    "aria-pressed",
+    "aria-selected",
+    "aria-activedescendant",
+    "aria-atomic",
+    "aria-autocomplete",
+    "aria-controls",
+    "aria-describedby",
+    "aria-dropeffect",
+    "aria-flowto",
+    "aria-haspopup",
+    "aria-label",
+    "aria-labelledby",
+    "aria-level",
+    "aria-live",
+    "aria-multiline",
+    "aria-multiselectable",
+    "aria-orientation",
+    "aria-owns",
+    "aria-posinset",
+    "aria-readonly",
+    "aria-relevant",
+    "aria-required",
+    "aria-setsize",
+    "aria-sort",
+    "aria-valuemax",
+    "aria-valuemin",
+    "aria-valuenow",
+    "aria-valuetext",
+];