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Side by Side Diff: ui/accessibility/platform/ax_fake_caret_win.cc

Issue 2852763002: Added a system caret used for accessibility on Windows. (Closed)
Patch Set: Disabled all tests Created 3 years, 5 months ago
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1 // Copyright 2017 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/accessibility/platform/ax_fake_caret_win.h"
6
7 #include <windows.h>
8
9 #include "base/logging.h"
10 #include "ui/accessibility/ax_enums.h"
11 #include "ui/accessibility/platform/ax_platform_node_win.h"
12 #include "ui/accessibility/platform/ax_platform_unique_id.h"
13 #include "ui/gfx/geometry/rect_conversions.h"
14 #include "ui/gfx/geometry/rect_f.h"
15
16 namespace ui {
17
18 AXFakeCaretWin::AXFakeCaretWin(gfx::AcceleratedWidget event_target)
19 : event_target_(event_target) {
20 caret_ = static_cast<AXPlatformNodeWin*>(AXPlatformNodeWin::Create(this));
21 data_.id = GetNextAXPlatformNodeUniqueId();
22 data_.role = AX_ROLE_CARET;
23 data_.state = 0;
24 data_.SetName(L"caret");
25 data_.offset_container_id = -1;
26 }
27
28 AXFakeCaretWin::~AXFakeCaretWin() {
29 caret_->Destroy();
30 caret_ = nullptr;
31 }
32
33 base::win::ScopedComPtr<IAccessible> AXFakeCaretWin::GetCaret() const {
34 base::win::ScopedComPtr<IAccessible> caret_accessible;
35 HRESULT hr = caret_->QueryInterface(
36 IID_IAccessible,
37 reinterpret_cast<void**>(caret_accessible.GetAddressOf()));
38 DCHECK(SUCCEEDED(hr));
39 return caret_accessible;
40 }
41
42 void AXFakeCaretWin::MoveCaretTo(const gfx::Rect& bounds) {
43 if (bounds.IsEmpty())
44 return;
45 data_.location = gfx::RectF(bounds);
46 if (event_target_) {
47 ::NotifyWinEvent(EVENT_OBJECT_LOCATIONCHANGE, event_target_, OBJID_CARET,
48 -data_.id);
49 }
50 }
51
52 const AXNodeData& AXFakeCaretWin::GetData() const {
53 return data_;
54 }
55
56 const ui::AXTreeData& AXFakeCaretWin::GetTreeData() const {
57 CR_DEFINE_STATIC_LOCAL(ui::AXTreeData, empty_data, ());
58 return empty_data;
59 }
60
61 gfx::NativeWindow AXFakeCaretWin::GetTopLevelWidget() {
62 return nullptr;
63 }
64
65 gfx::NativeViewAccessible AXFakeCaretWin::GetParent() {
66 if (!event_target_)
67 return nullptr;
68
69 gfx::NativeViewAccessible parent;
70 HRESULT hr =
71 ::AccessibleObjectFromWindow(event_target_, OBJID_WINDOW, IID_IAccessible,
72 reinterpret_cast<void**>(&parent));
73 if (SUCCEEDED(hr))
74 return parent;
75 return nullptr;
76 }
77
78 int AXFakeCaretWin::GetChildCount() {
79 return 0;
80 }
81
82 gfx::NativeViewAccessible AXFakeCaretWin::ChildAtIndex(int index) {
83 return nullptr;
84 }
85
86 gfx::Rect AXFakeCaretWin::GetScreenBoundsRect() const {
87 gfx::Rect bounds = ToEnclosingRect(data_.location);
88 return bounds;
89 }
90
91 gfx::NativeViewAccessible AXFakeCaretWin::HitTestSync(int x, int y) {
92 return nullptr;
93 }
94
95 gfx::NativeViewAccessible AXFakeCaretWin::GetFocus() {
96 return nullptr;
97 }
98
99 gfx::AcceleratedWidget AXFakeCaretWin::GetTargetForNativeAccessibilityEvent() {
100 return event_target_;
101 }
102
103 bool AXFakeCaretWin::AccessibilityPerformAction(const ui::AXActionData& data) {
104 return false;
105 }
106
107 bool AXFakeCaretWin::ShouldIgnoreHoveredStateForTesting() {
108 return true;
109 }
110
111 } // namespace ui
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