Extend AXTreeSourceViews to handle aura::Window and views::Widget.

chrome/browser/ui/views/accessibility/ax_tree_source_views.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.
+
+#include "chrome/browser/ui/views/accessibility/ax_tree_source_views.h"
+
+#include <vector>
+
+#include "ui/views/accessibility/ax_aura_obj_cache.h"
+#include "ui/views/accessibility/ax_aura_obj_wrapper.h"
+
+using views::AXAuraObjCache;
+using views::AXAuraObjWrapper;
+
+AXTreeSourceViews::AXTreeSourceViews() {
+  root_.reset(
+      new AXRootObjWrapper(AXAuraObjCache::GetInstance()->GetNextID()));
+}
+
+AXTreeSourceViews::~AXTreeSourceViews() {
+  root_.reset();
+}
+
+AXAuraObjWrapper* AXTreeSourceViews::GetRoot() const {
+  return root_.get();
+}
+
+AXAuraObjWrapper* AXTreeSourceViews::GetFromId(int32 id) const {
+  if (id == root_->GetID())

[dmazzoni, 2014/04/29 17:20:59]

Why does the root have to be special-cased? Isn't it in the cache?

+    return root_.get();
+  return AXAuraObjCache::GetInstance()->Get(id);
+}
+
+int32 AXTreeSourceViews::GetId(AXAuraObjWrapper* node) const {
+  return node->GetID();
+}
+
+void AXTreeSourceViews::GetChildren(AXAuraObjWrapper* node,
+    std::vector<AXAuraObjWrapper*>* out_children) const {
+  node->GetChildren(out_children);
+}
+
+AXAuraObjWrapper* AXTreeSourceViews::GetParent(AXAuraObjWrapper* node) const {
+  AXAuraObjWrapper* parent = node->GetParent();
+  if (!parent && root_->HasChild(node))

[dmazzoni, 2014/04/29 17:20:59]

Why can't an AXWindowWrapper return the desktop as its parent?

+    parent = root_.get();
+  return parent;
+}
+
+bool AXTreeSourceViews::IsValid(AXAuraObjWrapper* node) const {
+  return node && node->GetID() != -1;
+}
+
+bool AXTreeSourceViews::IsEqual(AXAuraObjWrapper* node1,
+                                AXAuraObjWrapper* node2) const {
+  if (!node1 || !node2)
+    return false;
+
+  return node1->GetID() == node2->GetID() && node1->GetID() != -1;
+}
+
+AXAuraObjWrapper* AXTreeSourceViews::GetNull() const {
+  return NULL;
+}
+
+void AXTreeSourceViews::SerializeNode(
+    AXAuraObjWrapper* node, ui::AXNodeData* out_data) const {
+  node->Serialize(out_data);
+}
+
+std::string AXTreeSourceViews::ToString(
+    AXAuraObjWrapper* root, std::string prefix) {
+  ui::AXNodeData data;
+  root->Serialize(&data);
+  std::string output = prefix + data.ToString() + '\n';
+
+  std::vector<AXAuraObjWrapper*> children;
+  root->GetChildren(&children);
+
+  prefix += prefix[0];
+  for (size_t i = 0; i < children.size(); ++i)
+    output += ToString(children[i], prefix);
+
+  return output;
+}