| // 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 "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*> { |
| public: |
| AXTreeSourceAdapter(AXTree* tree) : tree_(tree) {} |
| ~AXTreeSourceAdapter() override {} |
| |
| // AXTreeSource implementation. |
| AXNode* GetRoot() const override { return tree_->root(); } |
| |
| AXNode* GetFromId(int32 id) const override { return tree_->GetFromId(id); } |
| |
| int32 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) |
| out_children->push_back(node->ChildAtIndex(i)); |
| } |
| |
| AXNode* GetParent(const AXNode* node) const override { |
| return node->parent(); |
| } |
| |
| bool IsValid(const AXNode* node) const override { return node != NULL; } |
| |
| bool IsEqual(const AXNode* node1, const AXNode* node2) const override { |
| return node1 == node2; |
| } |
| |
| const AXNode* GetNull() const override { return NULL; } |
| |
| void SerializeNode(const AXNode* node, AXNodeData* out_data) const override { |
| *out_data = node->data(); |
| } |
| |
| private: |
| AXTree* tree_; |
| }; |
| |
| AXSerializableTree::AXSerializableTree() |
| : AXTree() {} |
| |
| AXSerializableTree::AXSerializableTree(const AXTreeUpdate& initial_state) |
| : AXTree(initial_state) { |
| } |
| |
| AXSerializableTree::~AXSerializableTree() { |
| } |
| |
| AXTreeSource<const AXNode*>* AXSerializableTree::CreateTreeSource() { |
| return new AXTreeSourceAdapter(this); |
| } |
| |
| } // namespace ui |