Move WebAXObjectProxy and AccessibleController from CppBoundClass to gin::Wrappable

content/shell/renderer/test_runner/accessibility_controller.cc

+// Copyright 2014 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.
+
+// TODO(hajimehoshi): Remove this when UnsafePersistent is removed.
+#define V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR
+
+#include "content/shell/renderer/test_runner/accessibility_controller.h"
+
+#include "gin/handle.h"
+#include "gin/object_template_builder.h"
+#include "gin/wrappable.h"
+#include "third_party/WebKit/public/web/WebElement.h"
+#include "third_party/WebKit/public/web/WebFrame.h"
+#include "third_party/WebKit/public/web/WebKit.h"
+#include "third_party/WebKit/public/web/WebView.h"
+
+namespace content {
+
+class AccessibilityControllerBindings
+    : public gin::Wrappable<AccessibilityControllerBindings> {
+ public:
+  static gin::WrapperInfo kWrapperInfo;
+
+  static void Install(base::WeakPtr<AccessibilityController> controller,
+                      blink::WebFrame* frame);
+
+ private:
+  explicit AccessibilityControllerBindings(
+      base::WeakPtr<AccessibilityController> controller);
+  virtual ~AccessibilityControllerBindings();
+
+  // gin::Wrappable:
+  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) OVERRIDE;
+
+  void LogAccessibilityEvents();
+  void AddNotificationListener(v8::Handle<v8::Function> callback);
+  void RemoveNotificationListener();
+  v8::Handle<v8::Object> FocusedElement();
+  v8::Handle<v8::Object> RootElement();
+  v8::Handle<v8::Object> AccessibleElementById(const std::string& id);
+
+  base::WeakPtr<AccessibilityController> controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessibilityControllerBindings);
+};
+
+gin::WrapperInfo AccessibilityControllerBindings::kWrapperInfo = {
+    gin::kEmbedderNativeGin};
+
+// static
+void AccessibilityControllerBindings::Install(
+    base::WeakPtr<AccessibilityController> controller,
+    blink::WebFrame* frame) {
+  v8::Isolate* isolate = blink::mainThreadIsolate();
+  v8::HandleScope handle_scope(isolate);
+  v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
+  if (context.IsEmpty())
+    return;
+
+  v8::Context::Scope context_scope(context);
+
+  gin::Handle<AccessibilityControllerBindings> bindings =
+      gin::CreateHandle(isolate,
+                        new AccessibilityControllerBindings(controller));
+  v8::Handle<v8::Object> global = context->Global();
+  global->Set(gin::StringToV8(isolate, "accessibilityController"),
+              bindings.ToV8());
+}
+
+AccessibilityControllerBindings::AccessibilityControllerBindings(
+    base::WeakPtr<AccessibilityController> controller)
+  : controller_(controller) {
+}
+
+AccessibilityControllerBindings::~AccessibilityControllerBindings() {
+}
+
+gin::ObjectTemplateBuilder
+AccessibilityControllerBindings::GetObjectTemplateBuilder(
+    v8::Isolate* isolate) {
+  return gin::Wrappable<AccessibilityControllerBindings>::
+      GetObjectTemplateBuilder(isolate)
+      .SetMethod("logAccessibilityEvents",
+                 &AccessibilityControllerBindings::LogAccessibilityEvents)
+      .SetMethod("addNotificationListener",
+                 &AccessibilityControllerBindings::AddNotificationListener)
+      .SetMethod("removeNotificationListener",
+                 &AccessibilityControllerBindings::RemoveNotificationListener)
+      .SetProperty("focusedElement",
+                   &AccessibilityControllerBindings::FocusedElement)
+      .SetProperty("rootElement",
+                   &AccessibilityControllerBindings::RootElement)
+      .SetMethod("accessibleElementById",
+                 &AccessibilityControllerBindings::AccessibleElementById);
+}
+
+void AccessibilityControllerBindings::LogAccessibilityEvents() {
+  if (controller_)
+    controller_->LogAccessibilityEvents();
+}
+
+void AccessibilityControllerBindings::AddNotificationListener(
+    v8::Handle<v8::Function> callback) {
+  if (controller_)
+    controller_->AddNotificationListener(callback);
+}
+
+void AccessibilityControllerBindings::RemoveNotificationListener() {
+  if (controller_)
+    controller_->RemoveNotificationListener();
+}
+
+v8::Handle<v8::Object> AccessibilityControllerBindings::FocusedElement() {
+  return controller_ ? controller_->FocusedElement() : v8::Handle<v8::Object>();
+}
+
+v8::Handle<v8::Object> AccessibilityControllerBindings::RootElement() {
+  return controller_ ? controller_->RootElement() : v8::Handle<v8::Object>();
+}
+
+v8::Handle<v8::Object> AccessibilityControllerBindings::AccessibleElementById(
+    const std::string& id) {
+  return controller_ ? controller_->AccessibleElementById(id)
+                     : v8::Handle<v8::Object>();
+}
+
+AccessibilityController::AccessibilityController()
+    : log_accessibility_events_(false),
+      weak_factory_(this) {
+}
+
+AccessibilityController::~AccessibilityController() {
+  ClearNotificationCallbacks();
+}
+
+void AccessibilityController::Reset() {
+  root_element_ = blink::WebAXObject();
+  focused_element_ = blink::WebAXObject();
+  elements_.Clear();
+  ClearNotificationCallbacks();
+  log_accessibility_events_ = false;
+}
+
+void AccessibilityController::Install(blink::WebFrame* frame) {
+  blink::WebAXObject::enableAccessibility();
+  blink::WebAXObject::enableInlineTextBoxAccessibility();
+  AccessibilityControllerBindings::Install(weak_factory_.GetWeakPtr(), frame);
+}
+
+void AccessibilityController::SetFocusedElement(
+    const blink::WebAXObject& focused_element) {
+  focused_element_ = focused_element;
+}
+
+bool AccessibilityController::ShouldLogAccessibilityEvents() {
+  return log_accessibility_events_;
+}
+
+void AccessibilityController::NotificationReceived(
+    const blink::WebAXObject& target, const std::string& notification_name) {
+  v8::Isolate* isolate = blink::mainThreadIsolate();
+  v8::HandleScope handle_scope(isolate);
+
+  blink::WebFrame* frame = web_view_->mainFrame();
+  if (!frame)
+    return;
+
+  v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
+  if (context.IsEmpty())
+    return;
+
+  v8::Context::Scope context_scope(context);
+
+  // Call notification listeners on the element.
+  v8::Handle<v8::Object> element_handle = elements_.GetOrCreate(target);
+  WebAXObjectProxy* element;
+  bool result = gin::ConvertFromV8(isolate, element_handle, &element);
+  DCHECK(result);
+  element->NotificationReceived(frame, notification_name);
+
+  // Call global notification listeners.
+  v8::Handle<v8::Value> argv[] = {
+    element_handle,
+    v8::String::NewFromUtf8(isolate, notification_name.data(),
+                            v8::String::kNormalString,
+                            notification_name.size()),
+  };
+  for (CallbackList::iterator it = notification_callbacks_.begin();
+       it != notification_callbacks_.end(); ++it) {
+    frame->callFunctionEvenIfScriptDisabled((*it).NewLocal(isolate),
+                                            context->Global(),
+                                            arraysize(argv),
+                                            argv);
+  }
+}
+
+void AccessibilityController::SetDelegate(
+    WebTestRunner::WebTestDelegate* delegate) {
+  delegate_ = delegate;
+}
+
+void AccessibilityController::SetWebView(blink::WebView* web_view) {
+  web_view_ = web_view;
+}
+
+void AccessibilityController::LogAccessibilityEvents() {
+  log_accessibility_events_ = true;
+}
+
+void AccessibilityController::AddNotificationListener(
+    v8::Handle<v8::Function> callback) {
+  v8::Isolate* isolate = blink::mainThreadIsolate();
+  notification_callbacks_.push_back(
+      UnsafePersistent<v8::Function>(isolate, callback));
+}
+
+void AccessibilityController::RemoveNotificationListener() {
+  // FIXME: Implement this

[kouhei (in TOK), 2014/02/27 05:50:54]

Would you implement this?

notification_callbacks_.reset() should be enough IMO.

[hajimehoshi, 2014/02/27 07:33:07]

We realized that we don't have to set multiple callbacks for one object, so I
changed it to have only one callback. The methods will changed from
{add/remove}NotificationCallback to {set/unset}NotificationCallback. Same as
WebAXObject.

+}
+
+v8::Handle<v8::Object> AccessibilityController::FocusedElement() {
+  if (focused_element_.isNull())
+    focused_element_ = web_view_->accessibilityObject();
+  return elements_.GetOrCreate(focused_element_);
+}
+
+v8::Handle<v8::Object> AccessibilityController::RootElement() {
+  if (root_element_.isNull())
+    root_element_ = web_view_->accessibilityObject();
+  return elements_.CreateRoot(root_element_);
+}
+
+v8::Handle<v8::Object>
+AccessibilityController::AccessibleElementById(const std::string& id) {
+  if (root_element_.isNull())
+    root_element_ = web_view_->accessibilityObject();
+
+  if (!root_element_.updateBackingStoreAndCheckValidity())
+    return v8::Handle<v8::Object>();
+
+  return FindAccessibleElementByIdRecursive(
+      root_element_, blink::WebString::fromUTF8(id.c_str()));
+}
+
+v8::Handle<v8::Object>
+AccessibilityController::FindAccessibleElementByIdRecursive(
+    const blink::WebAXObject& obj, const blink::WebString& id) {
+  if (obj.isNull() || obj.isDetached())
+    return v8::Handle<v8::Object>();
+
+  blink::WebNode node = obj.node();
+  if (!node.isNull() && node.isElementNode()) {
+    blink::WebElement element = node.to<blink::WebElement>();
+    element.getAttribute("id");
+    if (element.getAttribute("id") == id)
+      return elements_.GetOrCreate(obj);
+  }
+
+  unsigned childCount = obj.childCount();
+  for (unsigned i = 0; i < childCount; i++) {
+    v8::Handle<v8::Object> result =
+        FindAccessibleElementByIdRecursive(obj.childAt(i), id);
+    if (*result)
+      return result;
+  }
+
+  return v8::Handle<v8::Object>();
+}
+
+void AccessibilityController::ClearNotificationCallbacks() {
+  for (CallbackList::iterator it = notification_callbacks_.begin();
+       it != notification_callbacks_.end(); ++it) {
+    it->Dispose();
+  }
+  notification_callbacks_.clear();
+}
+
+}  // namespace content