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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "AccEvent.h"
#include "nsAccUtils.h"
#include "DocAccessible.h"
#include "xpcAccEvents.h"
#include "States.h"
#include "xpcAccessibleDocument.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/dom/Selection.h"
using namespace mozilla;
using namespace mozilla::a11y;
static_assert(static_cast<bool>(eNoUserInput) == false &&
static_cast<bool>(eFromUserInput) == true,
"EIsFromUserInput cannot be casted to bool");
////////////////////////////////////////////////////////////////////////////////
// AccEvent
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// AccEvent constructors
AccEvent::AccEvent(uint32_t aEventType, Accessible* aAccessible,
EIsFromUserInput aIsFromUserInput, EEventRule aEventRule) :
mEventType(aEventType), mEventRule(aEventRule), mAccessible(aAccessible)
{
if (aIsFromUserInput == eAutoDetect)
mIsFromUserInput = EventStateManager::IsHandlingUserInput();
else
mIsFromUserInput = aIsFromUserInput == eFromUserInput ? true : false;
}
////////////////////////////////////////////////////////////////////////////////
// AccEvent cycle collection
NS_IMPL_CYCLE_COLLECTION_CLASS(AccEvent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AccEvent)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAccessible)
if (AccTreeMutationEvent* tmEvent = downcast_accEvent(tmp)) {
tmEvent->SetNextEvent(nullptr);
tmEvent->SetPrevEvent(nullptr);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AccEvent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAccessible)
if (AccTreeMutationEvent* tmEvent = downcast_accEvent(tmp)) {
CycleCollectionNoteChild(cb, tmEvent->NextEvent(), "mNext");
CycleCollectionNoteChild(cb, tmEvent->PrevEvent(), "mPrevEvent");
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AccEvent, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AccEvent, Release)
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// AccTextChangeEvent
////////////////////////////////////////////////////////////////////////////////
// Note: we pass in eAllowDupes to the base class because we don't support text
// events coalescence. We fire delayed text change events in DocAccessible but
// we continue to base the event off the accessible object rather than just the
// node. This means we won't try to create an accessible based on the node when
// we are ready to fire the event and so we will no longer assert at that point
// if the node was removed from the document. Either way, the AT won't work with
// a defunct accessible so the behaviour should be equivalent.
AccTextChangeEvent::
AccTextChangeEvent(Accessible* aAccessible, int32_t aStart,
const nsAString& aModifiedText, bool aIsInserted,
EIsFromUserInput aIsFromUserInput)
: AccEvent(aIsInserted ?
static_cast<uint32_t>(nsIAccessibleEvent::EVENT_TEXT_INSERTED) :
static_cast<uint32_t>(nsIAccessibleEvent::EVENT_TEXT_REMOVED),
aAccessible, aIsFromUserInput, eAllowDupes)
, mStart(aStart)
, mIsInserted(aIsInserted)
, mModifiedText(aModifiedText)
{
// XXX We should use IsFromUserInput here, but that isn't always correct
// when the text change isn't related to content insertion or removal.
mIsFromUserInput = mAccessible->State() &
(states::FOCUSED | states::EDITABLE);
}
////////////////////////////////////////////////////////////////////////////////
// AccHideEvent
////////////////////////////////////////////////////////////////////////////////
AccHideEvent::
AccHideEvent(Accessible* aTarget, bool aNeedsShutdown) :
AccMutationEvent(::nsIAccessibleEvent::EVENT_HIDE, aTarget),
mNeedsShutdown(aNeedsShutdown)
{
mNextSibling = mAccessible->NextSibling();
mPrevSibling = mAccessible->PrevSibling();
}
////////////////////////////////////////////////////////////////////////////////
// AccShowEvent
////////////////////////////////////////////////////////////////////////////////
AccShowEvent::
AccShowEvent(Accessible* aTarget) :
AccMutationEvent(::nsIAccessibleEvent::EVENT_SHOW, aTarget)
{
int32_t idx = aTarget->IndexInParent();
MOZ_ASSERT(idx >= 0);
mInsertionIndex = idx;
}
////////////////////////////////////////////////////////////////////////////////
// AccTextSelChangeEvent
////////////////////////////////////////////////////////////////////////////////
AccTextSelChangeEvent::AccTextSelChangeEvent(HyperTextAccessible* aTarget,
dom::Selection* aSelection,
int32_t aReason) :
AccEvent(nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED, aTarget,
eAutoDetect, eCoalesceTextSelChange),
mSel(aSelection), mReason(aReason) {}
AccTextSelChangeEvent::~AccTextSelChangeEvent() { }
bool
AccTextSelChangeEvent::IsCaretMoveOnly() const
{
return mSel->RangeCount() == 1 && mSel->IsCollapsed() &&
((mReason & (nsISelectionListener::COLLAPSETOSTART_REASON |
nsISelectionListener::COLLAPSETOEND_REASON)) == 0);
}
////////////////////////////////////////////////////////////////////////////////
// AccSelChangeEvent
////////////////////////////////////////////////////////////////////////////////
AccSelChangeEvent::
AccSelChangeEvent(Accessible* aWidget, Accessible* aItem,
SelChangeType aSelChangeType) :
AccEvent(0, aItem, eAutoDetect, eCoalesceSelectionChange),
mWidget(aWidget), mItem(aItem), mSelChangeType(aSelChangeType),
mPreceedingCount(0), mPackedEvent(nullptr)
{
if (aSelChangeType == eSelectionAdd) {
if (mWidget->GetSelectedItem(1))
mEventType = nsIAccessibleEvent::EVENT_SELECTION_ADD;
else
mEventType = nsIAccessibleEvent::EVENT_SELECTION;
} else {
mEventType = nsIAccessibleEvent::EVENT_SELECTION_REMOVE;
}
}
////////////////////////////////////////////////////////////////////////////////
// AccTableChangeEvent
////////////////////////////////////////////////////////////////////////////////
AccTableChangeEvent::
AccTableChangeEvent(Accessible* aAccessible, uint32_t aEventType,
int32_t aRowOrColIndex, int32_t aNumRowsOrCols) :
AccEvent(aEventType, aAccessible),
mRowOrColIndex(aRowOrColIndex), mNumRowsOrCols(aNumRowsOrCols)
{
}
////////////////////////////////////////////////////////////////////////////////
// AccVCChangeEvent
////////////////////////////////////////////////////////////////////////////////
AccVCChangeEvent::
AccVCChangeEvent(Accessible* aAccessible,
Accessible* aOldAccessible,
int32_t aOldStart, int32_t aOldEnd,
int16_t aReason, EIsFromUserInput aIsFromUserInput) :
AccEvent(::nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED, aAccessible,
aIsFromUserInput),
mOldAccessible(aOldAccessible), mOldStart(aOldStart), mOldEnd(aOldEnd),
mReason(aReason)
{
}
already_AddRefed<nsIAccessibleEvent>
a11y::MakeXPCEvent(AccEvent* aEvent)
{
DocAccessible* doc = aEvent->Document();
Accessible* acc = aEvent->GetAccessible();
nsINode* node = acc->GetNode();
nsIDOMNode* domNode = node ? node->AsDOMNode() : nullptr;
bool fromUser = aEvent->IsFromUserInput();
uint32_t type = aEvent->GetEventType();
uint32_t eventGroup = aEvent->GetEventGroups();
nsCOMPtr<nsIAccessibleEvent> xpEvent;
if (eventGroup & (1 << AccEvent::eStateChangeEvent)) {
AccStateChangeEvent* sc = downcast_accEvent(aEvent);
bool extra = false;
uint32_t state = nsAccUtils::To32States(sc->GetState(), &extra);
xpEvent = new xpcAccStateChangeEvent(type, ToXPC(acc), ToXPCDocument(doc),
domNode, fromUser,
state, extra, sc->IsStateEnabled());
return xpEvent.forget();
}
if (eventGroup & (1 << AccEvent::eTextChangeEvent)) {
AccTextChangeEvent* tc = downcast_accEvent(aEvent);
nsString text;
tc->GetModifiedText(text);
xpEvent = new xpcAccTextChangeEvent(type, ToXPC(acc), ToXPCDocument(doc),
domNode, fromUser,
tc->GetStartOffset(), tc->GetLength(),
tc->IsTextInserted(), text);
return xpEvent.forget();
}
if (eventGroup & (1 << AccEvent::eHideEvent)) {
AccHideEvent* hideEvent = downcast_accEvent(aEvent);
xpEvent = new xpcAccHideEvent(type, ToXPC(acc), ToXPCDocument(doc),
domNode, fromUser,
ToXPC(hideEvent->TargetParent()),
ToXPC(hideEvent->TargetNextSibling()),
ToXPC(hideEvent->TargetPrevSibling()));
return xpEvent.forget();
}
if (eventGroup & (1 << AccEvent::eCaretMoveEvent)) {
AccCaretMoveEvent* cm = downcast_accEvent(aEvent);
xpEvent = new xpcAccCaretMoveEvent(type, ToXPC(acc), ToXPCDocument(doc),
domNode, fromUser,
cm->GetCaretOffset());
return xpEvent.forget();
}
if (eventGroup & (1 << AccEvent::eVirtualCursorChangeEvent)) {
AccVCChangeEvent* vcc = downcast_accEvent(aEvent);
xpEvent = new xpcAccVirtualCursorChangeEvent(type,
ToXPC(acc), ToXPCDocument(doc),
domNode, fromUser,
ToXPC(vcc->OldAccessible()),
vcc->OldStartOffset(),
vcc->OldEndOffset(),
vcc->Reason());
return xpEvent.forget();
}
if (eventGroup & (1 << AccEvent::eObjectAttrChangedEvent)) {
AccObjectAttrChangedEvent* oac = downcast_accEvent(aEvent);
xpEvent = new xpcAccObjectAttributeChangedEvent(type,
ToXPC(acc),
ToXPCDocument(doc), domNode,
fromUser,
oac->GetAttribute());
return xpEvent.forget();
}
xpEvent = new xpcAccEvent(type, ToXPC(acc), ToXPCDocument(doc), domNode, fromUser);
return xpEvent.forget();
}
|
