MacViews: Accessibility bridge

ui/views/accessibility/native_view_accessibility.cc

 // Copyright (c) 2013 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.
 
 #include "ui/views/accessibility/native_view_accessibility.h"
 
+#include "ui/accessibility/ax_view_state.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
 namespace views {
 
 #if !defined(OS_WIN)
 // static
 NativeViewAccessibility* NativeViewAccessibility::Create(View* view) {
-  return NULL;
+  DCHECK(view);
+  NativeViewAccessibility* instance = new NativeViewAccessibility();
+  instance->set_view(view);
+  return instance;
 }
 #endif
 
-NativeViewAccessibility::NativeViewAccessibility() {
+NativeViewAccessibility::NativeViewAccessibility()
+    : view_(NULL), ax_node_(ui::AXPlatformNode::Create(this)) {
 }
 
 NativeViewAccessibility::~NativeViewAccessibility() {
+  ax_node_->Destroy();
 }
 
 gfx::NativeViewAccessible NativeViewAccessibility::GetNativeObject() {
-  return NULL;
+  return ax_node_->GetNativeViewAccessible();
 }
 
 void NativeViewAccessibility::Destroy() {
   delete this;
 }
 
 #if !defined(OS_WIN)
 // static
 void NativeViewAccessibility::RegisterWebView(View* web_view) {
 }
 
 // static
 void NativeViewAccessibility::UnregisterWebView(View* web_view) {
 }
 #endif
 
+// ui::AXPlatformNodeDelegate
+
+ui::AXNodeData* NativeViewAccessibility::GetData() {
+  ui::AXViewState state;
+  view_->GetAccessibleState(&state);
+  data_.role = state.role;
+  data_.location = view_->GetBoundsInScreen();
+  return &data_;
+}
+
+int NativeViewAccessibility::GetChildCount() {
+  return view_->child_count();
+}
+
+gfx::NativeViewAccessible NativeViewAccessibility::ChildAtIndex(int index) {
+  if (index >= view_->child_count())

[dmazzoni, 2014/07/30 05:53:12]

Just to be safe,  return null if index < 0 also, since |index| might come
directly from an untrusted third-party client.

[Andre, 2014/07/30 18:50:16]

Done.

+    return NULL;
+  return view_->child_at(index)->GetNativeViewAccessible();
+}
+
+gfx::NativeViewAccessible NativeViewAccessibility::GetParent() {
+  if (view_->parent())
+    return view_->parent()->GetNativeViewAccessible();
+
+#if defined(OS_MACOSX)
+  if (view_->GetWidget())
+    return view_->GetWidget()->GetNativeView();
+#endif
+
+  return NULL;
+}
+
+gfx::Vector2d NativeViewAccessibility::GetGlobalCoordinateOffset() {
+  return gfx::Vector2d(0, 0);  // location is already in screen coordinates.
+}
+
+void NativeViewAccessibility::NotifyAccessibilityEvent(ui::AXEvent event_type) {
+}
+
 }  // namespace views