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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/accessibility/render_accessibility_manager.h"
#include <utility>
#include "base/debug/alias.h"
#include "base/functional/bind.h"
#include "base/notreached.h"
#include "content/renderer/accessibility/render_accessibility_impl.h"
#include "content/renderer/render_frame_impl.h"
#include "third_party/blink/public/common/features.h"
namespace content {
RenderAccessibilityManager::RenderAccessibilityManager(
RenderFrameImpl* render_frame)
: render_frame_(render_frame) {}
RenderAccessibilityManager::~RenderAccessibilityManager() = default;
void RenderAccessibilityManager::BindReceiver(
mojo::PendingAssociatedReceiver<blink::mojom::RenderAccessibility>
receiver) {
// TODO(crbug.com/40842669): re-add DCHECK(!receiver_.is_bound()),
// once underlying issue is resolved.
if (receiver_.is_bound())
receiver_.reset();
receiver_.Bind(std::move(receiver));
receiver_.set_disconnect_handler(base::BindOnce(
[](RenderAccessibilityManager* impl) {
impl->receiver_.reset();
impl->SetMode(ui::AXMode::kNone, 0);
},
base::Unretained(this)));
}
RenderAccessibilityImpl*
RenderAccessibilityManager::GetRenderAccessibilityImpl() {
return render_accessibility_.get();
}
ui::AXMode RenderAccessibilityManager::GetAccessibilityMode() const {
if (!render_accessibility_)
return ui::AXMode();
return render_accessibility_->GetAccessibilityMode();
}
void RenderAccessibilityManager::SetMode(const ui::AXMode& new_mode,
uint32_t reset_token) {
ui::AXMode old_mode = GetAccessibilityMode();
if (old_mode == new_mode) {
if (render_accessibility_) {
render_accessibility_->set_reset_token(reset_token);
}
return;
}
if (new_mode.has_mode(ui::AXMode::kWebContents) &&
!old_mode.has_mode(ui::AXMode::kWebContents)) {
render_accessibility_ =
std::make_unique<RenderAccessibilityImpl>(this, render_frame_);
} else if (!new_mode.has_mode(ui::AXMode::kWebContents) &&
old_mode.has_mode(ui::AXMode::kWebContents)) {
render_accessibility_.reset();
}
if (render_accessibility_) {
CHECK(reset_token);
render_accessibility_->set_reset_token(reset_token);
render_accessibility_->NotifyAccessibilityModeChange(new_mode);
}
// Notify the RenderFrame when the accessibility mode is changes to ensure it
// notifies the relevant observers (subclasses of RenderFrameObserver). This
// does not include the RenderAccessibilityImpl instance owned by |this| which
// already received the mode change above. It must go first because it sets up
// or tears down Blink accessibility ensuring subsequent observers can reason
// accurately about accessibility.
render_frame_->NotifyAccessibilityModeChange(new_mode);
}
void RenderAccessibilityManager::FatalError() {
NO_CODE_FOLDING();
NOTREACHED() << "Invalid accessibility tree.";
}
void RenderAccessibilityManager::HitTest(
const gfx::Point& point,
ax::mojom::Event event_to_fire,
int request_id,
blink::mojom::RenderAccessibility::HitTestCallback callback) {
DCHECK(render_accessibility_);
render_accessibility_->HitTest(point, event_to_fire, request_id,
std::move(callback));
}
void RenderAccessibilityManager::PerformAction(const ui::AXActionData& data) {
DCHECK(render_accessibility_);
render_accessibility_->PerformAction(data);
}
void RenderAccessibilityManager::Reset(uint32_t reset_token) {
DCHECK(render_accessibility_);
render_accessibility_->Reset(reset_token);
}
void RenderAccessibilityManager::HandleAXEvents(
ui::AXUpdatesAndEvents& updates_and_events,
ui::AXLocationAndScrollUpdates& location_and_scroll_updates,
uint32_t reset_token,
blink::mojom::RenderAccessibilityHost::HandleAXEventsCallback callback) {
CHECK(reset_token);
GetOrCreateRemoteRenderAccessibilityHost()->HandleAXEvents(
updates_and_events, location_and_scroll_updates, reset_token,
std::move(callback));
}
mojo::Remote<blink::mojom::RenderAccessibilityHost>&
RenderAccessibilityManager::GetOrCreateRemoteRenderAccessibilityHost() {
if (!render_accessibility_host_) {
render_frame_->GetBrowserInterfaceBroker().GetInterface(
render_accessibility_host_.BindNewPipeAndPassReceiver());
}
return render_accessibility_host_;
}
void RenderAccessibilityManager::CloseConnection() {
if (render_accessibility_host_) {
render_accessibility_host_.reset();
if (render_accessibility_) {
render_accessibility_->ConnectionClosed();
}
}
}
} // namespace content
|
