blob: 01cd5e52af60fdc794307b5d103b542d98e18930 [file] [log] [blame]
// Copyright 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/accessibility/ax_serializable_tree.h"
#include <stdint.h>
#include "ui/accessibility/ax_node.h"
namespace ui {
// This class is an implementation of the AXTreeSource interface with
// AXNode as the node type, that just delegates to an AXTree. The purpose
// of this is so that AXTreeSerializer only needs to work with the
// AXTreeSource abstraction and doesn't need to actually know about
// AXTree directly. Another AXTreeSource is used to abstract the Blink
// accessibility tree.
class AX_EXPORT AXTreeSourceAdapter
: public AXTreeSource<const AXNode*, AXNodeData, AXTreeData> {
AXTreeSourceAdapter(AXTree* tree) : tree_(tree) {}
~AXTreeSourceAdapter() override {}
// AXTreeSource implementation.
bool GetTreeData(AXTreeData* data) const override {
*data = tree_->data();
return true;
AXNode* GetRoot() const override { return tree_->root(); }
AXNode* GetFromId(int32_t id) const override { return tree_->GetFromId(id); }
int32_t GetId(const AXNode* node) const override { return node->id(); }
void GetChildren(const AXNode* node,
std::vector<const AXNode*>* out_children) const override {
for (int i = 0; i < node->child_count(); ++i)
AXNode* GetParent(const AXNode* node) const override {
return node->parent();
bool IsValid(const AXNode* node) const override { return node != nullptr; }
bool IsEqual(const AXNode* node1, const AXNode* node2) const override {
return node1 == node2;
const AXNode* GetNull() const override { return nullptr; }
void SerializeNode(const AXNode* node, AXNodeData* out_data) const override {
*out_data = node->data();
AXTree* tree_;
: AXTree() {}
const AXTreeUpdate& initial_state)
: AXTree(initial_state) {
AXSerializableTree::~AXSerializableTree() {
AXTreeSource<const AXNode*, AXNodeData, AXTreeData>*
AXSerializableTree::CreateTreeSource() {
return new AXTreeSourceAdapter(this);
} // namespace ui