1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
// 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.
#ifndef CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_
#define CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_
#include <map>
#include "base/stl_util.h"
template <typename T>
struct DefaultSingletonTraits;
// A class which generates a unique id given a process id and routing id.
// Currently, placeholder implementation pending finalization of out of process
// iframes.
class AXTreeIDRegistry {
public:
typedef int AXTreeID;
typedef std::pair<int, int> FrameID;
// Get the single instance of this class.
static AXTreeIDRegistry* GetInstance();
// Obtains a unique id given a |process_id| and |routing_id|. Placeholder
// for full implementation once out of process iframe accessibility finalizes.
int GetOrCreateAXTreeID(int process_id, int routing_id);
FrameID GetFrameID(int ax_tree_id);
void RemoveAXTreeID(int ax_tree_id);
private:
friend struct DefaultSingletonTraits<AXTreeIDRegistry>;
AXTreeIDRegistry();
virtual ~AXTreeIDRegistry();
// Tracks the current unique ax frame id.
int ax_tree_id_counter_;
// Maps an accessibility tree to its frame via ids.
std::map<AXTreeID, FrameID> ax_tree_to_frame_id_map_;
// Maps frames to an accessibility tree via ids.
std::map<FrameID, AXTreeID> frame_to_ax_tree_id_map_;
DISALLOW_COPY_AND_ASSIGN(AXTreeIDRegistry);
};
#endif // CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_
|
