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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "InterfaceInitFuncs.h"
#include "LocalAccessible-inl.h"
#include "AccessibleWrap.h"
#include "nsAccUtils.h"
#include "nsMai.h"
#include "nsWindow.h"
#include "mozilla/Likely.h"
#include "mozilla/a11y/DocAccessibleParent.h"
#include "mozilla/a11y/RemoteAccessible.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/Document.h"
#include "nsAccessibilityService.h"
using namespace mozilla;
using namespace mozilla::a11y;
extern "C" {
static AtkObject* refAccessibleAtPointCB(AtkComponent* aComponent, gint aAccX,
gint aAccY, AtkCoordType aCoordType) {
return refAccessibleAtPointHelper(ATK_OBJECT(aComponent), aAccX, aAccY,
aCoordType);
}
static void getExtentsCB(AtkComponent* aComponent, gint* aX, gint* aY,
gint* aWidth, gint* aHeight, AtkCoordType aCoordType) {
getExtentsHelper(ATK_OBJECT(aComponent), aX, aY, aWidth, aHeight, aCoordType);
}
static gboolean grabFocusCB(AtkComponent* aComponent) {
AtkObject* atkObject = ATK_OBJECT(aComponent);
Accessible* acc = GetInternalObj(atkObject);
if (acc) {
acc->TakeFocus();
return TRUE;
}
return FALSE;
}
// ScrollType is compatible
MOZ_CAN_RUN_SCRIPT_BOUNDARY
static gboolean scrollToCB(AtkComponent* aComponent, AtkScrollType type) {
AtkObject* atkObject = ATK_OBJECT(aComponent);
if (Accessible* acc = GetInternalObj(atkObject)) {
acc->ScrollTo(type);
return TRUE;
}
return FALSE;
}
// CoordType is compatible
static gboolean scrollToPointCB(AtkComponent* aComponent, AtkCoordType coords,
gint x, gint y) {
AtkObject* atkObject = ATK_OBJECT(aComponent);
AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
if (accWrap) {
accWrap->ScrollToPoint(coords, x, y);
return TRUE;
}
RemoteAccessible* proxy = GetProxy(atkObject);
if (proxy) {
proxy->ScrollToPoint(coords, x, y);
return TRUE;
}
return FALSE;
}
}
AtkObject* refAccessibleAtPointHelper(AtkObject* aAtkObj, gint aX, gint aY,
AtkCoordType aCoordType) {
Accessible* acc = GetInternalObj(aAtkObj);
if (!acc) {
return nullptr;
}
// Accessible::ChildAtPoint(x,y) is in screen pixels.
if (aCoordType == ATK_XY_WINDOW) {
mozilla::LayoutDeviceIntPoint winCoords =
nsAccUtils::GetScreenCoordsForWindow(acc);
aX += winCoords.x;
aY += winCoords.y;
}
Accessible* accAtPoint =
acc->ChildAtPoint(aX, aY, Accessible::EWhichChildAtPoint::DeepestChild);
if (!accAtPoint) {
return nullptr;
}
roles::Role role = accAtPoint->Role();
if (role == roles::TEXT_LEAF || role == roles::STATICTEXT) {
// We don't include text leaf nodes in the ATK tree, so return the parent.
accAtPoint = accAtPoint->Parent();
MOZ_ASSERT(accAtPoint, "Text leaf should always have a parent");
}
AtkObject* atkObj = GetWrapperFor(accAtPoint);
if (atkObj) {
g_object_ref(atkObj);
}
return atkObj;
}
static double getScaleFactor(Accessible* aAccessible) {
DocAccessible* docAcc = nullptr;
if (LocalAccessible* localAcc = aAccessible->AsLocal()) {
docAcc = localAcc->Document();
} else {
RemoteAccessible* remote = aAccessible->AsRemote();
LocalAccessible* outerDoc = remote->OuterDocOfRemoteBrowser();
if (outerDoc) {
docAcc = outerDoc->Document();
}
}
if (!docAcc || !docAcc->DocumentNode()) {
return 1.0;
}
nsCOMPtr<nsIWidget> rootWidget =
nsContentUtils::WidgetForDocument(docAcc->DocumentNode());
if (!rootWidget) {
return 1.0;
}
if (RefPtr<nsWindow> window =
static_cast<nsWindow*>(rootWidget->GetTopLevelWidget())) {
return window->FractionalScaleFactor();
}
return 1.0;
}
void getExtentsHelper(AtkObject* aAtkObj, gint* aX, gint* aY, gint* aWidth,
gint* aHeight, AtkCoordType aCoordType) {
*aX = *aY = *aWidth = *aHeight = -1;
Accessible* acc = GetInternalObj(aAtkObj);
if (!acc) {
return;
}
mozilla::LayoutDeviceIntRect screenRect = acc->Bounds();
if (screenRect.IsEmpty()) {
return;
}
if (aCoordType == ATK_XY_WINDOW) {
mozilla::LayoutDeviceIntPoint winCoords =
nsAccUtils::GetScreenCoordsForWindow(acc);
screenRect.x -= winCoords.x;
screenRect.y -= winCoords.y;
}
double scaleFactor = getScaleFactor(acc);
*aX = screenRect.x / scaleFactor;
*aY = screenRect.y / scaleFactor;
*aWidth = screenRect.width / scaleFactor;
*aHeight = screenRect.height / scaleFactor;
}
void componentInterfaceInitCB(AtkComponentIface* aIface) {
NS_ASSERTION(aIface, "Invalid Interface");
if (MOZ_UNLIKELY(!aIface)) return;
/*
* Use default implementation in atk for contains, get_position,
* and get_size
*/
aIface->ref_accessible_at_point = refAccessibleAtPointCB;
aIface->get_extents = getExtentsCB;
aIface->grab_focus = grabFocusCB;
if (IsAtkVersionAtLeast(2, 30)) {
aIface->scroll_to = scrollToCB;
aIface->scroll_to_point = scrollToPointCB;
}
}
|
