accessible/src/atk/AccessibleWrap.cpp@97036ab72558
accessible/src/atk/AccessibleWrap.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #include "AccessibleWrap.h"
9 #include "Accessible-inl.h"
10 #include "ApplicationAccessibleWrap.h"
11 #include "InterfaceInitFuncs.h"
12 #include "nsAccUtils.h"
13 #include "nsIAccessibleRelation.h"
14 #include "nsIAccessibleTable.h"
15 #include "RootAccessible.h"
16 #include "nsIAccessibleValue.h"
17 #include "nsMai.h"
18 #include "nsMaiHyperlink.h"
19 #include "nsString.h"
20 #include "nsAutoPtr.h"
21 #include "prprf.h"
22 #include "nsStateMap.h"
23 #include "Relation.h"
24 #include "RootAccessible.h"
25 #include "States.h"
26 #include "nsISimpleEnumerator.h"
28 #include "mozilla/ArrayUtils.h"
29 #include "nsXPCOMStrings.h"
30 #include "nsComponentManagerUtils.h"
31 #include "nsIPersistentProperties2.h"
33 using namespace mozilla;
34 using namespace mozilla::a11y;
36 AccessibleWrap::EAvailableAtkSignals AccessibleWrap::gAvailableAtkSignals =
37 eUnknown;
39 //defined in ApplicationAccessibleWrap.cpp
40 extern "C" GType g_atk_hyperlink_impl_type;
42 /* MaiAtkObject */
44 enum {
45 ACTIVATE,
46 CREATE,
47 DEACTIVATE,
48 DESTROY,
49 MAXIMIZE,
50 MINIMIZE,
51 RESIZE,
52 RESTORE,
53 LAST_SIGNAL
54 };
56 enum MaiInterfaceType {
57 MAI_INTERFACE_COMPONENT, /* 0 */
58 MAI_INTERFACE_ACTION,
59 MAI_INTERFACE_VALUE,
60 MAI_INTERFACE_EDITABLE_TEXT,
61 MAI_INTERFACE_HYPERTEXT,
62 MAI_INTERFACE_HYPERLINK_IMPL,
63 MAI_INTERFACE_SELECTION,
64 MAI_INTERFACE_TABLE,
65 MAI_INTERFACE_TEXT,
66 MAI_INTERFACE_DOCUMENT,
67 MAI_INTERFACE_IMAGE /* 10 */
68 };
70 static GType GetAtkTypeForMai(MaiInterfaceType type)
71 {
72 switch (type) {
73 case MAI_INTERFACE_COMPONENT:
74 return ATK_TYPE_COMPONENT;
75 case MAI_INTERFACE_ACTION:
76 return ATK_TYPE_ACTION;
77 case MAI_INTERFACE_VALUE:
78 return ATK_TYPE_VALUE;
79 case MAI_INTERFACE_EDITABLE_TEXT:
80 return ATK_TYPE_EDITABLE_TEXT;
81 case MAI_INTERFACE_HYPERTEXT:
82 return ATK_TYPE_HYPERTEXT;
83 case MAI_INTERFACE_HYPERLINK_IMPL:
84 return g_atk_hyperlink_impl_type;
85 case MAI_INTERFACE_SELECTION:
86 return ATK_TYPE_SELECTION;
87 case MAI_INTERFACE_TABLE:
88 return ATK_TYPE_TABLE;
89 case MAI_INTERFACE_TEXT:
90 return ATK_TYPE_TEXT;
91 case MAI_INTERFACE_DOCUMENT:
92 return ATK_TYPE_DOCUMENT;
93 case MAI_INTERFACE_IMAGE:
94 return ATK_TYPE_IMAGE;
95 }
96 return G_TYPE_INVALID;
97 }
99 static const char* kNonUserInputEvent = ":system";
101 static const GInterfaceInfo atk_if_infos[] = {
102 {(GInterfaceInitFunc)componentInterfaceInitCB,
103 (GInterfaceFinalizeFunc) nullptr, nullptr},
104 {(GInterfaceInitFunc)actionInterfaceInitCB,
105 (GInterfaceFinalizeFunc) nullptr, nullptr},
106 {(GInterfaceInitFunc)valueInterfaceInitCB,
107 (GInterfaceFinalizeFunc) nullptr, nullptr},
108 {(GInterfaceInitFunc)editableTextInterfaceInitCB,
109 (GInterfaceFinalizeFunc) nullptr, nullptr},
110 {(GInterfaceInitFunc)hypertextInterfaceInitCB,
111 (GInterfaceFinalizeFunc) nullptr, nullptr},
112 {(GInterfaceInitFunc)hyperlinkImplInterfaceInitCB,
113 (GInterfaceFinalizeFunc) nullptr, nullptr},
114 {(GInterfaceInitFunc)selectionInterfaceInitCB,
115 (GInterfaceFinalizeFunc) nullptr, nullptr},
116 {(GInterfaceInitFunc)tableInterfaceInitCB,
117 (GInterfaceFinalizeFunc) nullptr, nullptr},
118 {(GInterfaceInitFunc)textInterfaceInitCB,
119 (GInterfaceFinalizeFunc) nullptr, nullptr},
120 {(GInterfaceInitFunc)documentInterfaceInitCB,
121 (GInterfaceFinalizeFunc) nullptr, nullptr},
122 {(GInterfaceInitFunc)imageInterfaceInitCB,
123 (GInterfaceFinalizeFunc) nullptr, nullptr}
124 };
126 /**
127 * This MaiAtkObject is a thin wrapper, in the MAI namespace, for AtkObject
128 */
129 struct MaiAtkObject
130 {
131 AtkObject parent;
132 /*
133 * The AccessibleWrap whose properties and features are exported
134 * via this object instance.
135 */
136 AccessibleWrap* accWrap;
137 };
139 struct MaiAtkObjectClass
140 {
141 AtkObjectClass parent_class;
142 };
144 static guint mai_atk_object_signals [LAST_SIGNAL] = { 0, };
146 static void MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName);
148 G_BEGIN_DECLS
149 /* callbacks for MaiAtkObject */
150 static void classInitCB(AtkObjectClass *aClass);
151 static void initializeCB(AtkObject *aAtkObj, gpointer aData);
152 static void finalizeCB(GObject *aObj);
154 /* callbacks for AtkObject virtual functions */
155 static const gchar* getNameCB (AtkObject *aAtkObj);
156 /* getDescriptionCB is also used by image interface */
157 const gchar* getDescriptionCB (AtkObject *aAtkObj);
158 static AtkRole getRoleCB(AtkObject *aAtkObj);
159 static AtkAttributeSet* getAttributesCB(AtkObject *aAtkObj);
160 static const gchar* GetLocaleCB(AtkObject*);
161 static AtkObject* getParentCB(AtkObject *aAtkObj);
162 static gint getChildCountCB(AtkObject *aAtkObj);
163 static AtkObject* refChildCB(AtkObject *aAtkObj, gint aChildIndex);
164 static gint getIndexInParentCB(AtkObject *aAtkObj);
165 static AtkStateSet* refStateSetCB(AtkObject *aAtkObj);
166 static AtkRelationSet* refRelationSetCB(AtkObject *aAtkObj);
168 /* the missing atkobject virtual functions */
169 /*
170 static AtkLayer getLayerCB(AtkObject *aAtkObj);
171 static gint getMdiZorderCB(AtkObject *aAtkObj);
172 static void SetNameCB(AtkObject *aAtkObj,
173 const gchar *name);
174 static void SetDescriptionCB(AtkObject *aAtkObj,
175 const gchar *description);
176 static void SetParentCB(AtkObject *aAtkObj,
177 AtkObject *parent);
178 static void SetRoleCB(AtkObject *aAtkObj,
179 AtkRole role);
180 static guint ConnectPropertyChangeHandlerCB(
181 AtkObject *aObj,
182 AtkPropertyChangeHandler *handler);
183 static void RemovePropertyChangeHandlerCB(
184 AtkObject *aAtkObj,
185 guint handler_id);
186 static void InitializeCB(AtkObject *aAtkObj,
187 gpointer data);
188 static void ChildrenChangedCB(AtkObject *aAtkObj,
189 guint change_index,
190 gpointer changed_child);
191 static void FocusEventCB(AtkObject *aAtkObj,
192 gboolean focus_in);
193 static void PropertyChangeCB(AtkObject *aAtkObj,
194 AtkPropertyValues *values);
195 static void StateChangeCB(AtkObject *aAtkObj,
196 const gchar *name,
197 gboolean state_set);
198 static void VisibleDataChangedCB(AtkObject *aAtkObj);
199 */
200 G_END_DECLS
202 static GType GetMaiAtkType(uint16_t interfacesBits);
203 static const char * GetUniqueMaiAtkTypeName(uint16_t interfacesBits);
205 static gpointer parent_class = nullptr;
207 static GQuark quark_mai_hyperlink = 0;
209 GType
210 mai_atk_object_get_type(void)
211 {
212 static GType type = 0;
214 if (!type) {
215 static const GTypeInfo tinfo = {
216 sizeof(MaiAtkObjectClass),
217 (GBaseInitFunc)nullptr,
218 (GBaseFinalizeFunc)nullptr,
219 (GClassInitFunc)classInitCB,
220 (GClassFinalizeFunc)nullptr,
221 nullptr, /* class data */
222 sizeof(MaiAtkObject), /* instance size */
223 0, /* nb preallocs */
224 (GInstanceInitFunc)nullptr,
225 nullptr /* value table */
226 };
228 type = g_type_register_static(ATK_TYPE_OBJECT,
229 "MaiAtkObject", &tinfo, GTypeFlags(0));
230 quark_mai_hyperlink = g_quark_from_static_string("MaiHyperlink");
231 }
232 return type;
233 }
235 AccessibleWrap::
236 AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc) :
237 Accessible(aContent, aDoc), mAtkObject(nullptr)
238 {
239 }
241 AccessibleWrap::~AccessibleWrap()
242 {
243 NS_ASSERTION(!mAtkObject, "ShutdownAtkObject() is not called");
244 }
246 void
247 AccessibleWrap::ShutdownAtkObject()
248 {
249 if (mAtkObject) {
250 if (IS_MAI_OBJECT(mAtkObject)) {
251 MAI_ATK_OBJECT(mAtkObject)->accWrap = nullptr;
252 }
253 SetMaiHyperlink(nullptr);
254 g_object_unref(mAtkObject);
255 mAtkObject = nullptr;
256 }
257 }
259 void
260 AccessibleWrap::Shutdown()
261 {
262 ShutdownAtkObject();
263 Accessible::Shutdown();
264 }
266 MaiHyperlink*
267 AccessibleWrap::GetMaiHyperlink(bool aCreate /* = true */)
268 {
269 // make sure mAtkObject is created
270 GetAtkObject();
272 NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized");
273 NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "Invalid AtkObject");
274 MaiHyperlink* maiHyperlink = nullptr;
275 if (quark_mai_hyperlink && IS_MAI_OBJECT(mAtkObject)) {
276 maiHyperlink = (MaiHyperlink*)g_object_get_qdata(G_OBJECT(mAtkObject),
277 quark_mai_hyperlink);
278 if (!maiHyperlink && aCreate) {
279 maiHyperlink = new MaiHyperlink(this);
280 SetMaiHyperlink(maiHyperlink);
281 }
282 }
283 return maiHyperlink;
284 }
286 void
287 AccessibleWrap::SetMaiHyperlink(MaiHyperlink* aMaiHyperlink)
288 {
289 NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized");
290 NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "Invalid AtkObject");
291 if (quark_mai_hyperlink && IS_MAI_OBJECT(mAtkObject)) {
292 MaiHyperlink* maiHyperlink = GetMaiHyperlink(false);
293 if (!maiHyperlink && !aMaiHyperlink) {
294 return; // Never set and we're shutting down
295 }
296 delete maiHyperlink;
297 g_object_set_qdata(G_OBJECT(mAtkObject), quark_mai_hyperlink,
298 aMaiHyperlink);
299 }
300 }
302 NS_IMETHODIMP
303 AccessibleWrap::GetNativeInterface(void** aOutAccessible)
304 {
305 *aOutAccessible = nullptr;
307 if (!mAtkObject) {
308 if (IsDefunct() || !nsAccUtils::IsEmbeddedObject(this)) {
309 // We don't create ATK objects for node which has been shutdown, or
310 // nsIAccessible plain text leaves
311 return NS_ERROR_FAILURE;
312 }
314 GType type = GetMaiAtkType(CreateMaiInterfaces());
315 NS_ENSURE_TRUE(type, NS_ERROR_FAILURE);
316 mAtkObject =
317 reinterpret_cast<AtkObject *>
318 (g_object_new(type, nullptr));
319 NS_ENSURE_TRUE(mAtkObject, NS_ERROR_OUT_OF_MEMORY);
321 atk_object_initialize(mAtkObject, this);
322 mAtkObject->role = ATK_ROLE_INVALID;
323 mAtkObject->layer = ATK_LAYER_INVALID;
324 }
326 *aOutAccessible = mAtkObject;
327 return NS_OK;
328 }
330 AtkObject *
331 AccessibleWrap::GetAtkObject(void)
332 {
333 void *atkObj = nullptr;
334 GetNativeInterface(&atkObj);
335 return static_cast<AtkObject *>(atkObj);
336 }
338 // Get AtkObject from nsIAccessible interface
339 /* static */
340 AtkObject *
341 AccessibleWrap::GetAtkObject(nsIAccessible* acc)
342 {
343 void *atkObjPtr = nullptr;
344 acc->GetNativeInterface(&atkObjPtr);
345 return atkObjPtr ? ATK_OBJECT(atkObjPtr) : nullptr;
346 }
348 /* private */
349 uint16_t
350 AccessibleWrap::CreateMaiInterfaces(void)
351 {
352 uint16_t interfacesBits = 0;
354 // The Component interface is supported by all accessibles.
355 interfacesBits |= 1 << MAI_INTERFACE_COMPONENT;
357 // Add Action interface if the action count is more than zero.
358 if (ActionCount() > 0)
359 interfacesBits |= 1 << MAI_INTERFACE_ACTION;
361 // Text, Editabletext, and Hypertext interface.
362 HyperTextAccessible* hyperText = AsHyperText();
363 if (hyperText && hyperText->IsTextRole()) {
364 interfacesBits |= 1 << MAI_INTERFACE_TEXT;
365 interfacesBits |= 1 << MAI_INTERFACE_EDITABLE_TEXT;
366 if (!nsAccUtils::MustPrune(this))
367 interfacesBits |= 1 << MAI_INTERFACE_HYPERTEXT;
368 }
370 // Value interface.
371 nsCOMPtr<nsIAccessibleValue> accessInterfaceValue;
372 QueryInterface(NS_GET_IID(nsIAccessibleValue),
373 getter_AddRefs(accessInterfaceValue));
374 if (accessInterfaceValue) {
375 interfacesBits |= 1 << MAI_INTERFACE_VALUE;
376 }
378 // Document interface.
379 if (IsDoc())
380 interfacesBits |= 1 << MAI_INTERFACE_DOCUMENT;
382 if (IsImage())
383 interfacesBits |= 1 << MAI_INTERFACE_IMAGE;
385 // HyperLink interface.
386 if (IsLink())
387 interfacesBits |= 1 << MAI_INTERFACE_HYPERLINK_IMPL;
389 if (!nsAccUtils::MustPrune(this)) { // These interfaces require children
390 // Table interface.
391 if (AsTable())
392 interfacesBits |= 1 << MAI_INTERFACE_TABLE;
394 // Selection interface.
395 if (IsSelect()) {
396 interfacesBits |= 1 << MAI_INTERFACE_SELECTION;
397 }
398 }
400 return interfacesBits;
401 }
403 static GType
404 GetMaiAtkType(uint16_t interfacesBits)
405 {
406 GType type;
407 static const GTypeInfo tinfo = {
408 sizeof(MaiAtkObjectClass),
409 (GBaseInitFunc) nullptr,
410 (GBaseFinalizeFunc) nullptr,
411 (GClassInitFunc) nullptr,
412 (GClassFinalizeFunc) nullptr,
413 nullptr, /* class data */
414 sizeof(MaiAtkObject), /* instance size */
415 0, /* nb preallocs */
416 (GInstanceInitFunc) nullptr,
417 nullptr /* value table */
418 };
420 /*
421 * The members we use to register GTypes are GetAtkTypeForMai
422 * and atk_if_infos, which are constant values to each MaiInterface
423 * So we can reuse the registered GType when having
424 * the same MaiInterface types.
425 */
426 const char *atkTypeName = GetUniqueMaiAtkTypeName(interfacesBits);
427 type = g_type_from_name(atkTypeName);
428 if (type) {
429 return type;
430 }
432 /*
433 * gobject limits the number of types that can directly derive from any
434 * given object type to 4095.
435 */
436 static uint16_t typeRegCount = 0;
437 if (typeRegCount++ >= 4095) {
438 return G_TYPE_INVALID;
439 }
440 type = g_type_register_static(MAI_TYPE_ATK_OBJECT,
441 atkTypeName,
442 &tinfo, GTypeFlags(0));
444 for (uint32_t index = 0; index < ArrayLength(atk_if_infos); index++) {
445 if (interfacesBits & (1 << index)) {
446 g_type_add_interface_static(type,
447 GetAtkTypeForMai((MaiInterfaceType)index),
448 &atk_if_infos[index]);
449 }
450 }
452 return type;
453 }
455 static const char*
456 GetUniqueMaiAtkTypeName(uint16_t interfacesBits)
457 {
458 #define MAI_ATK_TYPE_NAME_LEN (30) /* 10+sizeof(uint16_t)*8/4+1 < 30 */
460 static gchar namePrefix[] = "MaiAtkType"; /* size = 10 */
461 static gchar name[MAI_ATK_TYPE_NAME_LEN + 1];
463 PR_snprintf(name, MAI_ATK_TYPE_NAME_LEN, "%s%x", namePrefix,
464 interfacesBits);
465 name[MAI_ATK_TYPE_NAME_LEN] = '\0';
467 return name;
468 }
470 bool
471 AccessibleWrap::IsValidObject()
472 {
473 // to ensure we are not shut down
474 return !IsDefunct();
475 }
477 /* static functions for ATK callbacks */
478 void
479 classInitCB(AtkObjectClass *aClass)
480 {
481 GObjectClass *gobject_class = G_OBJECT_CLASS(aClass);
483 parent_class = g_type_class_peek_parent(aClass);
485 aClass->get_name = getNameCB;
486 aClass->get_description = getDescriptionCB;
487 aClass->get_parent = getParentCB;
488 aClass->get_n_children = getChildCountCB;
489 aClass->ref_child = refChildCB;
490 aClass->get_index_in_parent = getIndexInParentCB;
491 aClass->get_role = getRoleCB;
492 aClass->get_attributes = getAttributesCB;
493 aClass->get_object_locale = GetLocaleCB;
494 aClass->ref_state_set = refStateSetCB;
495 aClass->ref_relation_set = refRelationSetCB;
497 aClass->initialize = initializeCB;
499 gobject_class->finalize = finalizeCB;
501 mai_atk_object_signals [ACTIVATE] =
502 g_signal_new ("activate",
503 MAI_TYPE_ATK_OBJECT,
504 G_SIGNAL_RUN_LAST,
505 0, /* default signal handler */
506 nullptr, nullptr,
507 g_cclosure_marshal_VOID__VOID,
508 G_TYPE_NONE, 0);
509 mai_atk_object_signals [CREATE] =
510 g_signal_new ("create",
511 MAI_TYPE_ATK_OBJECT,
512 G_SIGNAL_RUN_LAST,
513 0, /* default signal handler */
514 nullptr, nullptr,
515 g_cclosure_marshal_VOID__VOID,
516 G_TYPE_NONE, 0);
517 mai_atk_object_signals [DEACTIVATE] =
518 g_signal_new ("deactivate",
519 MAI_TYPE_ATK_OBJECT,
520 G_SIGNAL_RUN_LAST,
521 0, /* default signal handler */
522 nullptr, nullptr,
523 g_cclosure_marshal_VOID__VOID,
524 G_TYPE_NONE, 0);
525 mai_atk_object_signals [DESTROY] =
526 g_signal_new ("destroy",
527 MAI_TYPE_ATK_OBJECT,
528 G_SIGNAL_RUN_LAST,
529 0, /* default signal handler */
530 nullptr, nullptr,
531 g_cclosure_marshal_VOID__VOID,
532 G_TYPE_NONE, 0);
533 mai_atk_object_signals [MAXIMIZE] =
534 g_signal_new ("maximize",
535 MAI_TYPE_ATK_OBJECT,
536 G_SIGNAL_RUN_LAST,
537 0, /* default signal handler */
538 nullptr, nullptr,
539 g_cclosure_marshal_VOID__VOID,
540 G_TYPE_NONE, 0);
541 mai_atk_object_signals [MINIMIZE] =
542 g_signal_new ("minimize",
543 MAI_TYPE_ATK_OBJECT,
544 G_SIGNAL_RUN_LAST,
545 0, /* default signal handler */
546 nullptr, nullptr,
547 g_cclosure_marshal_VOID__VOID,
548 G_TYPE_NONE, 0);
549 mai_atk_object_signals [RESIZE] =
550 g_signal_new ("resize",
551 MAI_TYPE_ATK_OBJECT,
552 G_SIGNAL_RUN_LAST,
553 0, /* default signal handler */
554 nullptr, nullptr,
555 g_cclosure_marshal_VOID__VOID,
556 G_TYPE_NONE, 0);
557 mai_atk_object_signals [RESTORE] =
558 g_signal_new ("restore",
559 MAI_TYPE_ATK_OBJECT,
560 G_SIGNAL_RUN_LAST,
561 0, /* default signal handler */
562 nullptr, nullptr,
563 g_cclosure_marshal_VOID__VOID,
564 G_TYPE_NONE, 0);
566 }
568 void
569 initializeCB(AtkObject *aAtkObj, gpointer aData)
570 {
571 NS_ASSERTION((IS_MAI_OBJECT(aAtkObj)), "Invalid AtkObject");
572 NS_ASSERTION(aData, "Invalid Data to init AtkObject");
573 if (!aAtkObj || !aData)
574 return;
576 /* call parent init function */
577 /* AtkObjectClass has not a "initialize" function now,
578 * maybe it has later
579 */
581 if (ATK_OBJECT_CLASS(parent_class)->initialize)
582 ATK_OBJECT_CLASS(parent_class)->initialize(aAtkObj, aData);
584 /* initialize object */
585 MAI_ATK_OBJECT(aAtkObj)->accWrap =
586 static_cast<AccessibleWrap*>(aData);
587 }
589 void
590 finalizeCB(GObject *aObj)
591 {
592 if (!IS_MAI_OBJECT(aObj))
593 return;
594 NS_ASSERTION(MAI_ATK_OBJECT(aObj)->accWrap == nullptr, "AccWrap NOT null");
596 // call parent finalize function
597 // finalize of GObjectClass will unref the accessible parent if has
598 if (G_OBJECT_CLASS (parent_class)->finalize)
599 G_OBJECT_CLASS (parent_class)->finalize(aObj);
600 }
602 const gchar*
603 getNameCB(AtkObject* aAtkObj)
604 {
605 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
606 if (!accWrap)
607 return nullptr;
609 nsAutoString name;
610 accWrap->Name(name);
612 // XXX Firing an event from here does not seem right
613 MaybeFireNameChange(aAtkObj, name);
615 return aAtkObj->name;
616 }
618 static void
619 MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName)
620 {
621 NS_ConvertUTF16toUTF8 newNameUTF8(aNewName);
622 if (aAtkObj->name && newNameUTF8.Equals(aAtkObj->name))
623 return;
625 // Below we duplicate the functionality of atk_object_set_name(),
626 // but without calling atk_object_get_name(). Instead of
627 // atk_object_get_name() we directly access aAtkObj->name. This is because
628 // atk_object_get_name() would call getNameCB() which would call
629 // MaybeFireNameChange() (or atk_object_set_name() before this problem was
630 // fixed) and we would get an infinite recursion.
631 // See http://bugzilla.mozilla.org/733712
633 // Do not notify for initial name setting.
634 // See bug http://bugzilla.gnome.org/665870
635 bool notify = !!aAtkObj->name;
637 free(aAtkObj->name);
638 aAtkObj->name = strdup(newNameUTF8.get());
640 if (notify)
641 g_object_notify(G_OBJECT(aAtkObj), "accessible-name");
642 }
644 const gchar *
645 getDescriptionCB(AtkObject *aAtkObj)
646 {
647 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
648 if (!accWrap || accWrap->IsDefunct())
649 return nullptr;
651 /* nsIAccessible is responsible for the nonnull description */
652 nsAutoString uniDesc;
653 accWrap->Description(uniDesc);
655 NS_ConvertUTF8toUTF16 objDesc(aAtkObj->description);
656 if (!uniDesc.Equals(objDesc))
657 atk_object_set_description(aAtkObj,
658 NS_ConvertUTF16toUTF8(uniDesc).get());
660 return aAtkObj->description;
661 }
663 AtkRole
664 getRoleCB(AtkObject *aAtkObj)
665 {
666 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
667 if (!accWrap)
668 return ATK_ROLE_INVALID;
670 #ifdef DEBUG
671 NS_ASSERTION(nsAccUtils::IsTextInterfaceSupportCorrect(accWrap),
672 "Does not support nsIAccessibleText when it should");
673 #endif
675 if (aAtkObj->role != ATK_ROLE_INVALID)
676 return aAtkObj->role;
678 #define ROLE(geckoRole, stringRole, atkRole, macRole, \
679 msaaRole, ia2Role, nameRule) \
680 case roles::geckoRole: \
681 aAtkObj->role = atkRole; \
682 break;
684 switch (accWrap->Role()) {
685 #include "RoleMap.h"
686 default:
687 MOZ_CRASH("Unknown role.");
688 };
690 #undef ROLE
692 if (aAtkObj->role == ATK_ROLE_LIST_BOX && !IsAtkVersionAtLeast(2, 1))
693 aAtkObj->role = ATK_ROLE_LIST;
694 else if (aAtkObj->role == ATK_ROLE_TABLE_ROW && !IsAtkVersionAtLeast(2, 1))
695 aAtkObj->role = ATK_ROLE_LIST_ITEM;
697 return aAtkObj->role;
698 }
700 static AtkAttributeSet*
701 ConvertToAtkAttributeSet(nsIPersistentProperties* aAttributes)
702 {
703 if (!aAttributes)
704 return nullptr;
706 AtkAttributeSet *objAttributeSet = nullptr;
707 nsCOMPtr<nsISimpleEnumerator> propEnum;
708 nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum));
709 NS_ENSURE_SUCCESS(rv, nullptr);
711 bool hasMore;
712 while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
713 nsCOMPtr<nsISupports> sup;
714 rv = propEnum->GetNext(getter_AddRefs(sup));
715 NS_ENSURE_SUCCESS(rv, objAttributeSet);
717 nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup));
718 NS_ENSURE_TRUE(propElem, objAttributeSet);
720 nsAutoCString name;
721 rv = propElem->GetKey(name);
722 NS_ENSURE_SUCCESS(rv, objAttributeSet);
724 nsAutoString value;
725 rv = propElem->GetValue(value);
726 NS_ENSURE_SUCCESS(rv, objAttributeSet);
728 AtkAttribute *objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute));
729 objAttr->name = g_strdup(name.get());
730 objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
731 objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
732 }
734 //libspi will free it
735 return objAttributeSet;
736 }
738 AtkAttributeSet*
739 GetAttributeSet(Accessible* aAccessible)
740 {
741 nsCOMPtr<nsIPersistentProperties> attributes = aAccessible->Attributes();
742 if (attributes) {
743 // There is no ATK state for haspopup, must use object attribute to expose
744 // the same info.
745 if (aAccessible->State() & states::HASPOPUP) {
746 nsAutoString unused;
747 attributes->SetStringProperty(NS_LITERAL_CSTRING("haspopup"),
748 NS_LITERAL_STRING("true"), unused);
749 }
751 return ConvertToAtkAttributeSet(attributes);
752 }
754 return nullptr;
755 }
757 AtkAttributeSet *
758 getAttributesCB(AtkObject *aAtkObj)
759 {
760 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
761 return accWrap ? GetAttributeSet(accWrap) : nullptr;
762 }
764 const gchar*
765 GetLocaleCB(AtkObject* aAtkObj)
766 {
767 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
768 if (!accWrap)
769 return nullptr;
771 nsAutoString locale;
772 accWrap->Language(locale);
773 return AccessibleWrap::ReturnString(locale);
774 }
776 AtkObject *
777 getParentCB(AtkObject *aAtkObj)
778 {
779 if (!aAtkObj->accessible_parent) {
780 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
781 if (!accWrap)
782 return nullptr;
784 Accessible* accParent = accWrap->Parent();
785 if (!accParent)
786 return nullptr;
788 AtkObject* parent = AccessibleWrap::GetAtkObject(accParent);
789 if (parent)
790 atk_object_set_parent(aAtkObj, parent);
791 }
792 return aAtkObj->accessible_parent;
793 }
795 gint
796 getChildCountCB(AtkObject *aAtkObj)
797 {
798 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
799 if (!accWrap || nsAccUtils::MustPrune(accWrap)) {
800 return 0;
801 }
803 return static_cast<gint>(accWrap->EmbeddedChildCount());
804 }
806 AtkObject *
807 refChildCB(AtkObject *aAtkObj, gint aChildIndex)
808 {
809 // aChildIndex should not be less than zero
810 if (aChildIndex < 0) {
811 return nullptr;
812 }
814 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
815 if (!accWrap || nsAccUtils::MustPrune(accWrap)) {
816 return nullptr;
817 }
819 Accessible* accChild = accWrap->GetEmbeddedChildAt(aChildIndex);
820 if (!accChild)
821 return nullptr;
823 AtkObject* childAtkObj = AccessibleWrap::GetAtkObject(accChild);
825 NS_ASSERTION(childAtkObj, "Fail to get AtkObj");
826 if (!childAtkObj)
827 return nullptr;
828 g_object_ref(childAtkObj);
830 if (aAtkObj != childAtkObj->accessible_parent)
831 atk_object_set_parent(childAtkObj, aAtkObj);
833 return childAtkObj;
834 }
836 gint
837 getIndexInParentCB(AtkObject *aAtkObj)
838 {
839 // We don't use nsIAccessible::GetIndexInParent() because
840 // for ATK we don't want to include text leaf nodes as children
841 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
842 if (!accWrap) {
843 return -1;
844 }
846 Accessible* parent = accWrap->Parent();
847 if (!parent)
848 return -1; // No parent
850 return parent->GetIndexOfEmbeddedChild(accWrap);
851 }
853 static void
854 TranslateStates(uint64_t aState, AtkStateSet* aStateSet)
855 {
856 // atk doesn't have a read only state so read only things shouldn't be
857 // editable.
858 if (aState & states::READONLY)
859 aState &= ~states::EDITABLE;
861 // Convert every state to an entry in AtkStateMap
862 uint32_t stateIndex = 0;
863 uint64_t bitMask = 1;
864 while (gAtkStateMap[stateIndex].stateMapEntryType != kNoSuchState) {
865 if (gAtkStateMap[stateIndex].atkState) { // There's potentially an ATK state for this
866 bool isStateOn = (aState & bitMask) != 0;
867 if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite) {
868 isStateOn = !isStateOn;
869 }
870 if (isStateOn) {
871 atk_state_set_add_state(aStateSet, gAtkStateMap[stateIndex].atkState);
872 }
873 }
874 bitMask <<= 1;
875 ++ stateIndex;
876 }
877 }
879 AtkStateSet *
880 refStateSetCB(AtkObject *aAtkObj)
881 {
882 AtkStateSet *state_set = nullptr;
883 state_set = ATK_OBJECT_CLASS(parent_class)->ref_state_set(aAtkObj);
885 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
886 if (!accWrap) {
887 TranslateStates(states::DEFUNCT, state_set);
888 return state_set;
889 }
891 // Map states
892 TranslateStates(accWrap->State(), state_set);
894 return state_set;
895 }
897 static void
898 UpdateAtkRelation(RelationType aType, Accessible* aAcc,
899 AtkRelationType aAtkType, AtkRelationSet* aAtkSet)
900 {
901 if (aAtkType == ATK_RELATION_NULL)
902 return;
904 AtkRelation* atkRelation =
905 atk_relation_set_get_relation_by_type(aAtkSet, aAtkType);
906 if (atkRelation)
907 atk_relation_set_remove(aAtkSet, atkRelation);
909 Relation rel(aAcc->RelationByType(aType));
910 nsTArray<AtkObject*> targets;
911 Accessible* tempAcc = nullptr;
912 while ((tempAcc = rel.Next()))
913 targets.AppendElement(AccessibleWrap::GetAtkObject(tempAcc));
915 if (targets.Length()) {
916 atkRelation = atk_relation_new(targets.Elements(),
917 targets.Length(), aAtkType);
918 atk_relation_set_add(aAtkSet, atkRelation);
919 g_object_unref(atkRelation);
920 }
921 }
923 AtkRelationSet *
924 refRelationSetCB(AtkObject *aAtkObj)
925 {
926 AtkRelationSet* relation_set =
927 ATK_OBJECT_CLASS(parent_class)->ref_relation_set(aAtkObj);
929 AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
930 if (!accWrap)
931 return relation_set;
933 #define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
934 UpdateAtkRelation(RelationType::geckoType, accWrap, atkType, relation_set);
936 #include "RelationTypeMap.h"
938 #undef RELATIONTYPE
940 return relation_set;
941 }
943 // Check if aAtkObj is a valid MaiAtkObject, and return the AccessibleWrap
944 // for it.
945 AccessibleWrap*
946 GetAccessibleWrap(AtkObject* aAtkObj)
947 {
948 NS_ENSURE_TRUE(IS_MAI_OBJECT(aAtkObj), nullptr);
949 AccessibleWrap* accWrap = MAI_ATK_OBJECT(aAtkObj)->accWrap;
951 // Check if the accessible was deconstructed.
952 if (!accWrap)
953 return nullptr;
955 NS_ENSURE_TRUE(accWrap->GetAtkObject() == aAtkObj, nullptr);
957 AccessibleWrap* appAccWrap = ApplicationAcc();
958 if (appAccWrap != accWrap && !accWrap->IsValidObject())
959 return nullptr;
961 return accWrap;
962 }
964 nsresult
965 AccessibleWrap::HandleAccEvent(AccEvent* aEvent)
966 {
967 nsresult rv = Accessible::HandleAccEvent(aEvent);
968 NS_ENSURE_SUCCESS(rv, rv);
970 Accessible* accessible = aEvent->GetAccessible();
971 NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);
973 // The accessible can become defunct if we have an xpcom event listener
974 // which decides it would be fun to change the DOM and flush layout.
975 if (accessible->IsDefunct())
976 return NS_OK;
978 uint32_t type = aEvent->GetEventType();
980 AtkObject* atkObj = AccessibleWrap::GetAtkObject(accessible);
982 // We don't create ATK objects for nsIAccessible plain text leaves,
983 // just return NS_OK in such case
984 if (!atkObj) {
985 NS_ASSERTION(type == nsIAccessibleEvent::EVENT_SHOW ||
986 type == nsIAccessibleEvent::EVENT_HIDE,
987 "Event other than SHOW and HIDE fired for plain text leaves");
988 return NS_OK;
989 }
991 AccessibleWrap* accWrap = GetAccessibleWrap(atkObj);
992 if (!accWrap) {
993 return NS_OK; // Node is shut down
994 }
996 switch (type) {
997 case nsIAccessibleEvent::EVENT_STATE_CHANGE:
998 return FireAtkStateChangeEvent(aEvent, atkObj);
1000 case nsIAccessibleEvent::EVENT_TEXT_REMOVED:
1001 case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
1002 return FireAtkTextChangedEvent(aEvent, atkObj);
1004 case nsIAccessibleEvent::EVENT_FOCUS:
1005 {
1006 a11y::RootAccessible* rootAccWrap = accWrap->RootAccessible();
1007 if (rootAccWrap && rootAccWrap->mActivated) {
1008 atk_focus_tracker_notify(atkObj);
1009 // Fire state change event for focus
1010 atk_object_notify_state_change(atkObj, ATK_STATE_FOCUSED, true);
1011 return NS_OK;
1012 }
1013 } break;
1015 case nsIAccessibleEvent::EVENT_NAME_CHANGE:
1016 {
1017 nsAutoString newName;
1018 accessible->Name(newName);
1020 MaybeFireNameChange(atkObj, newName);
1022 break;
1023 }
1024 case nsIAccessibleEvent::EVENT_VALUE_CHANGE:
1025 {
1026 nsCOMPtr<nsIAccessibleValue> value(do_QueryObject(accessible));
1027 if (value) { // Make sure this is a numeric value
1028 // Don't fire for MSAA string value changes (e.g. text editing)
1029 // ATK values are always numeric
1030 g_object_notify( (GObject*)atkObj, "accessible-value" );
1031 }
1032 } break;
1034 case nsIAccessibleEvent::EVENT_SELECTION:
1035 case nsIAccessibleEvent::EVENT_SELECTION_ADD:
1036 case nsIAccessibleEvent::EVENT_SELECTION_REMOVE:
1037 {
1038 // XXX: dupe events may be fired
1039 AccSelChangeEvent* selChangeEvent = downcast_accEvent(aEvent);
1040 g_signal_emit_by_name(AccessibleWrap::GetAtkObject(selChangeEvent->Widget()),
1041 "selection_changed");
1042 break;
1043 }
1045 case nsIAccessibleEvent::EVENT_SELECTION_WITHIN:
1046 {
1047 g_signal_emit_by_name(atkObj, "selection_changed");
1048 break;
1049 }
1051 case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
1052 g_signal_emit_by_name(atkObj, "text_selection_changed");
1053 break;
1055 case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED:
1056 {
1057 AccCaretMoveEvent* caretMoveEvent = downcast_accEvent(aEvent);
1058 NS_ASSERTION(caretMoveEvent, "Event needs event data");
1059 if (!caretMoveEvent)
1060 break;
1062 int32_t caretOffset = caretMoveEvent->GetCaretOffset();
1063 g_signal_emit_by_name(atkObj, "text_caret_moved", caretOffset);
1064 } break;
1066 case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED:
1067 g_signal_emit_by_name(atkObj, "text-attributes-changed");
1068 break;
1070 case nsIAccessibleEvent::EVENT_TABLE_MODEL_CHANGED:
1071 g_signal_emit_by_name(atkObj, "model_changed");
1072 break;
1074 case nsIAccessibleEvent::EVENT_TABLE_ROW_INSERT:
1075 {
1076 AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
1077 NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
1079 int32_t rowIndex = tableEvent->GetIndex();
1080 int32_t numRows = tableEvent->GetCount();
1082 g_signal_emit_by_name(atkObj, "row_inserted", rowIndex, numRows);
1083 } break;
1085 case nsIAccessibleEvent::EVENT_TABLE_ROW_DELETE:
1086 {
1087 AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
1088 NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
1090 int32_t rowIndex = tableEvent->GetIndex();
1091 int32_t numRows = tableEvent->GetCount();
1093 g_signal_emit_by_name(atkObj, "row_deleted", rowIndex, numRows);
1094 } break;
1096 case nsIAccessibleEvent::EVENT_TABLE_ROW_REORDER:
1097 {
1098 g_signal_emit_by_name(atkObj, "row_reordered");
1099 break;
1100 }
1102 case nsIAccessibleEvent::EVENT_TABLE_COLUMN_INSERT:
1103 {
1104 AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
1105 NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
1107 int32_t colIndex = tableEvent->GetIndex();
1108 int32_t numCols = tableEvent->GetCount();
1109 g_signal_emit_by_name(atkObj, "column_inserted", colIndex, numCols);
1110 } break;
1112 case nsIAccessibleEvent::EVENT_TABLE_COLUMN_DELETE:
1113 {
1114 AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
1115 NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);
1117 int32_t colIndex = tableEvent->GetIndex();
1118 int32_t numCols = tableEvent->GetCount();
1119 g_signal_emit_by_name(atkObj, "column_deleted", colIndex, numCols);
1120 } break;
1122 case nsIAccessibleEvent::EVENT_TABLE_COLUMN_REORDER:
1123 g_signal_emit_by_name(atkObj, "column_reordered");
1124 break;
1126 case nsIAccessibleEvent::EVENT_SECTION_CHANGED:
1127 g_signal_emit_by_name(atkObj, "visible_data_changed");
1128 break;
1130 case nsIAccessibleEvent::EVENT_SHOW:
1131 return FireAtkShowHideEvent(aEvent, atkObj, true);
1133 case nsIAccessibleEvent::EVENT_HIDE:
1134 // XXX - Handle native dialog accessibles.
1135 if (!accessible->IsRoot() && accessible->HasARIARole() &&
1136 accessible->ARIARole() == roles::DIALOG) {
1137 guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
1138 g_signal_emit(atkObj, id, 0);
1139 }
1140 return FireAtkShowHideEvent(aEvent, atkObj, false);
1142 /*
1143 * Because dealing with menu is very different between nsIAccessible
1144 * and ATK, and the menu activity is important, specially transfer the
1145 * following two event.
1146 * Need more verification by AT test.
1147 */
1148 case nsIAccessibleEvent::EVENT_MENU_START:
1149 case nsIAccessibleEvent::EVENT_MENU_END:
1150 break;
1152 case nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE:
1153 {
1154 accessible->AsRoot()->mActivated = true;
1155 guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
1156 g_signal_emit(atkObj, id, 0);
1158 // Always fire a current focus event after activation.
1159 FocusMgr()->ForceFocusEvent();
1160 } break;
1162 case nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE:
1163 {
1164 accessible->AsRoot()->mActivated = false;
1165 guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
1166 g_signal_emit(atkObj, id, 0);
1167 } break;
1169 case nsIAccessibleEvent::EVENT_WINDOW_MAXIMIZE:
1170 {
1171 guint id = g_signal_lookup("maximize", MAI_TYPE_ATK_OBJECT);
1172 g_signal_emit(atkObj, id, 0);
1173 } break;
1175 case nsIAccessibleEvent::EVENT_WINDOW_MINIMIZE:
1176 {
1177 guint id = g_signal_lookup("minimize", MAI_TYPE_ATK_OBJECT);
1178 g_signal_emit(atkObj, id, 0);
1179 } break;
1181 case nsIAccessibleEvent::EVENT_WINDOW_RESTORE:
1182 {
1183 guint id = g_signal_lookup("restore", MAI_TYPE_ATK_OBJECT);
1184 g_signal_emit(atkObj, id, 0);
1185 } break;
1187 case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
1188 g_signal_emit_by_name (atkObj, "load_complete");
1189 // XXX - Handle native dialog accessibles.
1190 if (!accessible->IsRoot() && accessible->HasARIARole() &&
1191 accessible->ARIARole() == roles::DIALOG) {
1192 guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
1193 g_signal_emit(atkObj, id, 0);
1194 }
1195 break;
1197 case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD:
1198 g_signal_emit_by_name (atkObj, "reload");
1199 break;
1201 case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
1202 g_signal_emit_by_name (atkObj, "load_stopped");
1203 break;
1205 case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
1206 atk_focus_tracker_notify(atkObj); // fire extra focus event
1207 atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, true);
1208 atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, true);
1209 break;
1211 case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
1212 atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, false);
1213 atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, false);
1214 break;
1215 }
1217 return NS_OK;
1218 }
1220 nsresult
1221 AccessibleWrap::FireAtkStateChangeEvent(AccEvent* aEvent,
1222 AtkObject* aObject)
1223 {
1224 AccStateChangeEvent* event = downcast_accEvent(aEvent);
1225 NS_ENSURE_TRUE(event, NS_ERROR_FAILURE);
1227 bool isEnabled = event->IsStateEnabled();
1228 int32_t stateIndex = AtkStateMap::GetStateIndexFor(event->GetState());
1229 if (stateIndex >= 0) {
1230 NS_ASSERTION(gAtkStateMap[stateIndex].stateMapEntryType != kNoSuchState,
1231 "No such state");
1233 if (gAtkStateMap[stateIndex].atkState != kNone) {
1234 NS_ASSERTION(gAtkStateMap[stateIndex].stateMapEntryType != kNoStateChange,
1235 "State changes should not fired for this state");
1237 if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite)
1238 isEnabled = !isEnabled;
1240 // Fire state change for first state if there is one to map
1241 atk_object_notify_state_change(aObject,
1242 gAtkStateMap[stateIndex].atkState,
1243 isEnabled);
1244 }
1245 }
1247 return NS_OK;
1248 }
1250 nsresult
1251 AccessibleWrap::FireAtkTextChangedEvent(AccEvent* aEvent,
1252 AtkObject* aObject)
1253 {
1254 AccTextChangeEvent* event = downcast_accEvent(aEvent);
1255 NS_ENSURE_TRUE(event, NS_ERROR_FAILURE);
1257 int32_t start = event->GetStartOffset();
1258 uint32_t length = event->GetLength();
1259 bool isInserted = event->IsTextInserted();
1260 bool isFromUserInput = aEvent->IsFromUserInput();
1261 char* signal_name = nullptr;
1263 if (gAvailableAtkSignals == eUnknown)
1264 gAvailableAtkSignals =
1265 g_signal_lookup("text-insert", G_OBJECT_TYPE(aObject)) ?
1266 eHaveNewAtkTextSignals : eNoNewAtkSignals;
1268 if (gAvailableAtkSignals == eNoNewAtkSignals) {
1269 // XXX remove this code and the gHaveNewTextSignals check when we can
1270 // stop supporting old atk since it doesn't really work anyway
1271 // see bug 619002
1272 signal_name = g_strconcat(isInserted ? "text_changed::insert" :
1273 "text_changed::delete",
1274 isFromUserInput ? "" : kNonUserInputEvent, nullptr);
1275 g_signal_emit_by_name(aObject, signal_name, start, length);
1276 } else {
1277 nsAutoString text;
1278 event->GetModifiedText(text);
1279 signal_name = g_strconcat(isInserted ? "text-insert" : "text-remove",
1280 isFromUserInput ? "" : "::system", nullptr);
1281 g_signal_emit_by_name(aObject, signal_name, start, length,
1282 NS_ConvertUTF16toUTF8(text).get());
1283 }
1285 g_free(signal_name);
1286 return NS_OK;
1287 }
1289 nsresult
1290 AccessibleWrap::FireAtkShowHideEvent(AccEvent* aEvent,
1291 AtkObject* aObject, bool aIsAdded)
1292 {
1293 int32_t indexInParent = getIndexInParentCB(aObject);
1294 AtkObject *parentObject = getParentCB(aObject);
1295 NS_ENSURE_STATE(parentObject);
1297 bool isFromUserInput = aEvent->IsFromUserInput();
1298 char *signal_name = g_strconcat(aIsAdded ? "children_changed::add" : "children_changed::remove",
1299 isFromUserInput ? "" : kNonUserInputEvent, nullptr);
1300 g_signal_emit_by_name(parentObject, signal_name, indexInParent, aObject, nullptr);
1301 g_free(signal_name);
1303 return NS_OK;
1304 }
