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Diffstat (limited to 'accessible/atk/AccessibleWrap.cpp')
| -rw-r--r-- | accessible/atk/AccessibleWrap.cpp | 1305 |
1 files changed, 1305 insertions, 0 deletions
diff --git a/accessible/atk/AccessibleWrap.cpp b/accessible/atk/AccessibleWrap.cpp new file mode 100644 index 0000000000..98f303ee4a --- /dev/null +++ b/accessible/atk/AccessibleWrap.cpp @@ -0,0 +1,1305 @@ +/* -*- 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 "AccessibleWrap.h" + +#include "LocalAccessible-inl.h" +#include "AccAttributes.h" +#include "ApplicationAccessibleWrap.h" +#include "InterfaceInitFuncs.h" +#include "nsAccUtils.h" +#include "mozilla/a11y/PDocAccessible.h" +#include "OuterDocAccessible.h" +#include "RemoteAccessible.h" +#include "DocAccessibleParent.h" +#include "RootAccessible.h" +#include "mozilla/a11y/TableAccessible.h" +#include "mozilla/a11y/TableCellAccessible.h" +#include "nsMai.h" +#include "nsMaiHyperlink.h" +#include "nsString.h" +#include "nsStateMap.h" +#include "mozilla/a11y/Platform.h" +#include "Relation.h" +#include "RootAccessible.h" +#include "States.h" +#include "nsISimpleEnumerator.h" + +#include "mozilla/ArrayUtils.h" +#include "mozilla/Sprintf.h" +#include "nsAccessibilityService.h" +#include "nsComponentManagerUtils.h" + +using namespace mozilla; +using namespace mozilla::a11y; + +MaiAtkObject::EAvailableAtkSignals MaiAtkObject::gAvailableAtkSignals = + eUnknown; + +// defined in ApplicationAccessibleWrap.cpp +extern "C" GType g_atk_hyperlink_impl_type; + +/* MaiAtkObject */ + +enum { + ACTIVATE, + CREATE, + DEACTIVATE, + DESTROY, + MAXIMIZE, + MINIMIZE, + RESIZE, + RESTORE, + LAST_SIGNAL +}; + +enum MaiInterfaceType { + MAI_INTERFACE_COMPONENT, /* 0 */ + MAI_INTERFACE_ACTION, + MAI_INTERFACE_VALUE, + MAI_INTERFACE_EDITABLE_TEXT, + MAI_INTERFACE_HYPERTEXT, + MAI_INTERFACE_HYPERLINK_IMPL, + MAI_INTERFACE_SELECTION, + MAI_INTERFACE_TABLE, + MAI_INTERFACE_TEXT, + MAI_INTERFACE_DOCUMENT, + MAI_INTERFACE_IMAGE, /* 10 */ + MAI_INTERFACE_TABLE_CELL +}; + +static GType GetAtkTypeForMai(MaiInterfaceType type) { + switch (type) { + case MAI_INTERFACE_COMPONENT: + return ATK_TYPE_COMPONENT; + case MAI_INTERFACE_ACTION: + return ATK_TYPE_ACTION; + case MAI_INTERFACE_VALUE: + return ATK_TYPE_VALUE; + case MAI_INTERFACE_EDITABLE_TEXT: + return ATK_TYPE_EDITABLE_TEXT; + case MAI_INTERFACE_HYPERTEXT: + return ATK_TYPE_HYPERTEXT; + case MAI_INTERFACE_HYPERLINK_IMPL: + return g_atk_hyperlink_impl_type; + case MAI_INTERFACE_SELECTION: + return ATK_TYPE_SELECTION; + case MAI_INTERFACE_TABLE: + return ATK_TYPE_TABLE; + case MAI_INTERFACE_TEXT: + return ATK_TYPE_TEXT; + case MAI_INTERFACE_DOCUMENT: + return ATK_TYPE_DOCUMENT; + case MAI_INTERFACE_IMAGE: + return ATK_TYPE_IMAGE; + case MAI_INTERFACE_TABLE_CELL: + MOZ_ASSERT(false); + } + return G_TYPE_INVALID; +} + +#define NON_USER_EVENT ":system" + +// The atk interfaces we can expose without checking what version of ATK we are +// dealing with. At the moment AtkTableCell is the only interface we can't +// always expose. +static const GInterfaceInfo atk_if_infos[] = { + {(GInterfaceInitFunc)componentInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)actionInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)valueInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr, + nullptr}, + {(GInterfaceInitFunc)editableTextInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)hypertextInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)hyperlinkImplInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)selectionInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)tableInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr, + nullptr}, + {(GInterfaceInitFunc)textInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr, + nullptr}, + {(GInterfaceInitFunc)documentInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}, + {(GInterfaceInitFunc)imageInterfaceInitCB, (GInterfaceFinalizeFunc) nullptr, + nullptr}}; + +static GQuark quark_mai_hyperlink = 0; + +AtkHyperlink* MaiAtkObject::GetAtkHyperlink() { + NS_ASSERTION(quark_mai_hyperlink, "quark_mai_hyperlink not initialized"); + MaiHyperlink* maiHyperlink = + (MaiHyperlink*)g_object_get_qdata(G_OBJECT(this), quark_mai_hyperlink); + if (!maiHyperlink) { + maiHyperlink = new MaiHyperlink(acc); + g_object_set_qdata(G_OBJECT(this), quark_mai_hyperlink, maiHyperlink); + } + + return maiHyperlink->GetAtkHyperlink(); +} + +void MaiAtkObject::Shutdown() { + acc = nullptr; + MaiHyperlink* maiHyperlink = + (MaiHyperlink*)g_object_get_qdata(G_OBJECT(this), quark_mai_hyperlink); + if (maiHyperlink) { + delete maiHyperlink; + g_object_set_qdata(G_OBJECT(this), quark_mai_hyperlink, nullptr); + } +} + +struct MaiAtkObjectClass { + AtkObjectClass parent_class; +}; + +static guint mai_atk_object_signals[LAST_SIGNAL] = { + 0, +}; + +static void MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName); + +G_BEGIN_DECLS +/* callbacks for MaiAtkObject */ +static void classInitCB(AtkObjectClass* aClass); +static void initializeCB(AtkObject* aAtkObj, gpointer aData); +static void finalizeCB(GObject* aObj); + +/* callbacks for AtkObject virtual functions */ +static const gchar* getNameCB(AtkObject* aAtkObj); +/* getDescriptionCB is also used by image interface */ +const gchar* getDescriptionCB(AtkObject* aAtkObj); +static AtkRole getRoleCB(AtkObject* aAtkObj); +static AtkAttributeSet* getAttributesCB(AtkObject* aAtkObj); +static const gchar* GetLocaleCB(AtkObject*); +static AtkObject* getParentCB(AtkObject* aAtkObj); +static gint getChildCountCB(AtkObject* aAtkObj); +static AtkObject* refChildCB(AtkObject* aAtkObj, gint aChildIndex); +static gint getIndexInParentCB(AtkObject* aAtkObj); +static AtkStateSet* refStateSetCB(AtkObject* aAtkObj); +static AtkRelationSet* refRelationSetCB(AtkObject* aAtkObj); + +/* the missing atkobject virtual functions */ +/* + static AtkLayer getLayerCB(AtkObject *aAtkObj); + static gint getMdiZorderCB(AtkObject *aAtkObj); + static void SetNameCB(AtkObject *aAtkObj, + const gchar *name); + static void SetDescriptionCB(AtkObject *aAtkObj, + const gchar *description); + static void SetParentCB(AtkObject *aAtkObj, + AtkObject *parent); + static void SetRoleCB(AtkObject *aAtkObj, + AtkRole role); + static guint ConnectPropertyChangeHandlerCB( + AtkObject *aObj, + AtkPropertyChangeHandler *handler); + static void RemovePropertyChangeHandlerCB( + AtkObject *aAtkObj, + guint handler_id); + static void InitializeCB(AtkObject *aAtkObj, + gpointer data); + static void ChildrenChangedCB(AtkObject *aAtkObj, + guint change_index, + gpointer changed_child); + static void FocusEventCB(AtkObject *aAtkObj, + gboolean focus_in); + static void PropertyChangeCB(AtkObject *aAtkObj, + AtkPropertyValues *values); + static void StateChangeCB(AtkObject *aAtkObj, + const gchar *name, + gboolean state_set); + static void VisibleDataChangedCB(AtkObject *aAtkObj); +*/ +G_END_DECLS + +static GType GetMaiAtkType(uint16_t interfacesBits); +static const char* GetUniqueMaiAtkTypeName(uint16_t interfacesBits); + +static gpointer parent_class = nullptr; + +GType mai_atk_object_get_type(void) { + static GType type = 0; + + if (!type) { + static const GTypeInfo tinfo = { + sizeof(MaiAtkObjectClass), + (GBaseInitFunc) nullptr, + (GBaseFinalizeFunc) nullptr, + (GClassInitFunc)classInitCB, + (GClassFinalizeFunc) nullptr, + nullptr, /* class data */ + sizeof(MaiAtkObject), /* instance size */ + 0, /* nb preallocs */ + (GInstanceInitFunc) nullptr, + nullptr /* value table */ + }; + + type = g_type_register_static(ATK_TYPE_OBJECT, "MaiAtkObject", &tinfo, + GTypeFlags(0)); + quark_mai_hyperlink = g_quark_from_static_string("MaiHyperlink"); + } + return type; +} + +AccessibleWrap::AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc) + : LocalAccessible(aContent, aDoc), mAtkObject(nullptr) {} + +AccessibleWrap::~AccessibleWrap() { + NS_ASSERTION(!mAtkObject, "ShutdownAtkObject() is not called"); +} + +void AccessibleWrap::ShutdownAtkObject() { + if (!mAtkObject) return; + + NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "wrong type of atk object"); + if (IS_MAI_OBJECT(mAtkObject)) MAI_ATK_OBJECT(mAtkObject)->Shutdown(); + + g_object_unref(mAtkObject); + mAtkObject = nullptr; +} + +void AccessibleWrap::Shutdown() { + ShutdownAtkObject(); + LocalAccessible::Shutdown(); +} + +void AccessibleWrap::GetNativeInterface(void** aOutAccessible) { + *aOutAccessible = nullptr; + + if (!mAtkObject) { + if (IsDefunct() || IsText()) { + // We don't create ATK objects for node which has been shutdown or + // plain text leaves + return; + } + + GType type = GetMaiAtkType(CreateMaiInterfaces()); + if (!type) return; + + mAtkObject = reinterpret_cast<AtkObject*>(g_object_new(type, nullptr)); + if (!mAtkObject) return; + + atk_object_initialize(mAtkObject, static_cast<Accessible*>(this)); + mAtkObject->role = ATK_ROLE_INVALID; + mAtkObject->layer = ATK_LAYER_INVALID; + } + + *aOutAccessible = mAtkObject; +} + +AtkObject* AccessibleWrap::GetAtkObject(void) { + void* atkObj = nullptr; + GetNativeInterface(&atkObj); + return static_cast<AtkObject*>(atkObj); +} + +// Get AtkObject from LocalAccessible interface +/* static */ +AtkObject* AccessibleWrap::GetAtkObject(LocalAccessible* acc) { + void* atkObjPtr = nullptr; + acc->GetNativeInterface(&atkObjPtr); + return atkObjPtr ? ATK_OBJECT(atkObjPtr) : nullptr; +} + +/* private */ +uint16_t AccessibleWrap::CreateMaiInterfaces(void) { + uint16_t interfacesBits = 0; + + // The Component interface is supported by all accessibles. + interfacesBits |= 1 << MAI_INTERFACE_COMPONENT; + + // Add Action interface if the action count is more than zero. + if (ActionCount() > 0) interfacesBits |= 1 << MAI_INTERFACE_ACTION; + + // Text, Editabletext, and Hypertext interface. + HyperTextAccessible* hyperText = AsHyperText(); + if (hyperText && hyperText->IsTextRole()) { + interfacesBits |= 1 << MAI_INTERFACE_TEXT; + interfacesBits |= 1 << MAI_INTERFACE_EDITABLE_TEXT; + if (!nsAccUtils::MustPrune(this)) { + interfacesBits |= 1 << MAI_INTERFACE_HYPERTEXT; + } + } + + // Value interface. + if (HasNumericValue()) interfacesBits |= 1 << MAI_INTERFACE_VALUE; + + // Document interface. + if (IsDoc()) interfacesBits |= 1 << MAI_INTERFACE_DOCUMENT; + + if (IsImage()) interfacesBits |= 1 << MAI_INTERFACE_IMAGE; + + // HyperLink interface. + if (IsLink()) interfacesBits |= 1 << MAI_INTERFACE_HYPERLINK_IMPL; + + if (!nsAccUtils::MustPrune(this)) { // These interfaces require children + // Table interface. + if (AsTable()) interfacesBits |= 1 << MAI_INTERFACE_TABLE; + + if (AsTableCell()) interfacesBits |= 1 << MAI_INTERFACE_TABLE_CELL; + + // Selection interface. + if (IsSelect()) { + interfacesBits |= 1 << MAI_INTERFACE_SELECTION; + } + } + + return interfacesBits; +} + +static GType GetMaiAtkType(uint16_t interfacesBits) { + GType type; + static const GTypeInfo tinfo = { + sizeof(MaiAtkObjectClass), + (GBaseInitFunc) nullptr, + (GBaseFinalizeFunc) nullptr, + (GClassInitFunc) nullptr, + (GClassFinalizeFunc) nullptr, + nullptr, /* class data */ + sizeof(MaiAtkObject), /* instance size */ + 0, /* nb preallocs */ + (GInstanceInitFunc) nullptr, + nullptr /* value table */ + }; + + /* + * The members we use to register GTypes are GetAtkTypeForMai + * and atk_if_infos, which are constant values to each MaiInterface + * So we can reuse the registered GType when having + * the same MaiInterface types. + */ + const char* atkTypeName = GetUniqueMaiAtkTypeName(interfacesBits); + type = g_type_from_name(atkTypeName); + if (type) { + return type; + } + + /* + * gobject limits the number of types that can directly derive from any + * given object type to 4095. + */ + static uint16_t typeRegCount = 0; + if (typeRegCount++ >= 4095) { + return G_TYPE_INVALID; + } + type = g_type_register_static(MAI_TYPE_ATK_OBJECT, atkTypeName, &tinfo, + GTypeFlags(0)); + + for (uint32_t index = 0; index < ArrayLength(atk_if_infos); index++) { + if (interfacesBits & (1 << index)) { + g_type_add_interface_static(type, + GetAtkTypeForMai((MaiInterfaceType)index), + &atk_if_infos[index]); + } + } + + // Special case AtkTableCell so we can check what version of Atk we are + // dealing with. + if (IsAtkVersionAtLeast(2, 12) && + (interfacesBits & (1 << MAI_INTERFACE_TABLE_CELL))) { + const GInterfaceInfo cellInfo = { + (GInterfaceInitFunc)tableCellInterfaceInitCB, + (GInterfaceFinalizeFunc) nullptr, nullptr}; + g_type_add_interface_static(type, gAtkTableCellGetTypeFunc(), &cellInfo); + } + + return type; +} + +static const char* GetUniqueMaiAtkTypeName(uint16_t interfacesBits) { +#define MAI_ATK_TYPE_NAME_LEN (30) /* 10+sizeof(uint16_t)*8/4+1 < 30 */ + + static gchar namePrefix[] = "MaiAtkType"; /* size = 10 */ + static gchar name[MAI_ATK_TYPE_NAME_LEN + 1]; + + SprintfLiteral(name, "%s%x", namePrefix, interfacesBits); + name[MAI_ATK_TYPE_NAME_LEN] = '\0'; + + return name; +} + +bool AccessibleWrap::IsValidObject() { + // to ensure we are not shut down + return !IsDefunct(); +} + +/* static functions for ATK callbacks */ +void classInitCB(AtkObjectClass* aClass) { + GObjectClass* gobject_class = G_OBJECT_CLASS(aClass); + + parent_class = g_type_class_peek_parent(aClass); + + aClass->get_name = getNameCB; + aClass->get_description = getDescriptionCB; + aClass->get_parent = getParentCB; + aClass->get_n_children = getChildCountCB; + aClass->ref_child = refChildCB; + aClass->get_index_in_parent = getIndexInParentCB; + aClass->get_role = getRoleCB; + aClass->get_attributes = getAttributesCB; + aClass->get_object_locale = GetLocaleCB; + aClass->ref_state_set = refStateSetCB; + aClass->ref_relation_set = refRelationSetCB; + + aClass->initialize = initializeCB; + + gobject_class->finalize = finalizeCB; + + mai_atk_object_signals[ACTIVATE] = g_signal_new( + "activate", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[CREATE] = g_signal_new( + "create", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[DEACTIVATE] = g_signal_new( + "deactivate", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[DESTROY] = g_signal_new( + "destroy", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[MAXIMIZE] = g_signal_new( + "maximize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[MINIMIZE] = g_signal_new( + "minimize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[RESIZE] = g_signal_new( + "resize", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); + mai_atk_object_signals[RESTORE] = g_signal_new( + "restore", MAI_TYPE_ATK_OBJECT, G_SIGNAL_RUN_LAST, + 0, /* default signal handler */ + nullptr, nullptr, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); +} + +void initializeCB(AtkObject* aAtkObj, gpointer aData) { + NS_ASSERTION((IS_MAI_OBJECT(aAtkObj)), "Invalid AtkObject"); + NS_ASSERTION(aData, "Invalid Data to init AtkObject"); + if (!aAtkObj || !aData) return; + + /* call parent init function */ + /* AtkObjectClass has not a "initialize" function now, + * maybe it has later + */ + + if (ATK_OBJECT_CLASS(parent_class)->initialize) { + ATK_OBJECT_CLASS(parent_class)->initialize(aAtkObj, aData); + } + + /* initialize object */ + MAI_ATK_OBJECT(aAtkObj)->acc = static_cast<Accessible*>(aData); +} + +void finalizeCB(GObject* aObj) { + if (!IS_MAI_OBJECT(aObj)) return; + NS_ASSERTION(!MAI_ATK_OBJECT(aObj)->acc, "acc NOT null"); + + // call parent finalize function + // finalize of GObjectClass will unref the accessible parent if has + if (G_OBJECT_CLASS(parent_class)->finalize) { + G_OBJECT_CLASS(parent_class)->finalize(aObj); + } +} + +const gchar* getNameCB(AtkObject* aAtkObj) { + nsAutoString name; + if (Accessible* acc = GetInternalObj(aAtkObj)) { + acc->Name(name); + } else { + return nullptr; + } + + // XXX Firing an event from here does not seem right + MaybeFireNameChange(aAtkObj, name); + + return aAtkObj->name; +} + +static void MaybeFireNameChange(AtkObject* aAtkObj, const nsString& aNewName) { + NS_ConvertUTF16toUTF8 newNameUTF8(aNewName); + if (aAtkObj->name && !strcmp(aAtkObj->name, newNameUTF8.get())) return; + + // Below we duplicate the functionality of atk_object_set_name(), + // but without calling atk_object_get_name(). Instead of + // atk_object_get_name() we directly access aAtkObj->name. This is because + // atk_object_get_name() would call getNameCB() which would call + // MaybeFireNameChange() (or atk_object_set_name() before this problem was + // fixed) and we would get an infinite recursion. + // See http://bugzilla.mozilla.org/733712 + + // Do not notify for initial name setting. + // See bug http://bugzilla.gnome.org/665870 + bool notify = !!aAtkObj->name; + + free(aAtkObj->name); + aAtkObj->name = strdup(newNameUTF8.get()); + + if (notify) g_object_notify(G_OBJECT(aAtkObj), "accessible-name"); +} + +const gchar* getDescriptionCB(AtkObject* aAtkObj) { + nsAutoString uniDesc; + if (Accessible* acc = GetInternalObj(aAtkObj)) { + acc->Description(uniDesc); + } else { + return nullptr; + } + + NS_ConvertUTF8toUTF16 objDesc(aAtkObj->description); + if (!uniDesc.Equals(objDesc)) { + atk_object_set_description(aAtkObj, NS_ConvertUTF16toUTF8(uniDesc).get()); + } + + return aAtkObj->description; +} + +AtkRole getRoleCB(AtkObject* aAtkObj) { + if (aAtkObj->role != ATK_ROLE_INVALID) return aAtkObj->role; + + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return ATK_ROLE_INVALID; + } + +#ifdef DEBUG + if (AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj)) { + NS_ASSERTION(nsAccUtils::IsTextInterfaceSupportCorrect(accWrap), + "Does not support Text interface when it should"); + } +#endif + +#define ROLE(geckoRole, stringRole, ariaRole, atkRole, macRole, macSubrole, \ + msaaRole, ia2Role, androidClass, nameRule) \ + case roles::geckoRole: \ + aAtkObj->role = atkRole; \ + break; + + switch (acc->Role()) { +#include "RoleMap.h" + default: + MOZ_CRASH("Unknown role."); + } + +#undef ROLE + + if (aAtkObj->role == ATK_ROLE_LIST_BOX && !IsAtkVersionAtLeast(2, 1)) { + aAtkObj->role = ATK_ROLE_LIST; + } else if (aAtkObj->role == ATK_ROLE_TABLE_ROW && + !IsAtkVersionAtLeast(2, 1)) { + aAtkObj->role = ATK_ROLE_LIST_ITEM; + } else if (aAtkObj->role == ATK_ROLE_MATH && !IsAtkVersionAtLeast(2, 12)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_COMMENT && !IsAtkVersionAtLeast(2, 12)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_LANDMARK && + !IsAtkVersionAtLeast(2, 12)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_FOOTNOTE && + !IsAtkVersionAtLeast(2, 25, 2)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_STATIC && !IsAtkVersionAtLeast(2, 16)) { + aAtkObj->role = ATK_ROLE_TEXT; + } else if ((aAtkObj->role == ATK_ROLE_MATH_FRACTION || + aAtkObj->role == ATK_ROLE_MATH_ROOT) && + !IsAtkVersionAtLeast(2, 16)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_MARK && !IsAtkVersionAtLeast(2, 36)) { + aAtkObj->role = ATK_ROLE_TEXT; + } else if (aAtkObj->role == ATK_ROLE_SUGGESTION && + !IsAtkVersionAtLeast(2, 36)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if (aAtkObj->role == ATK_ROLE_COMMENT && !IsAtkVersionAtLeast(2, 36)) { + aAtkObj->role = ATK_ROLE_SECTION; + } else if ((aAtkObj->role == ATK_ROLE_CONTENT_DELETION || + aAtkObj->role == ATK_ROLE_CONTENT_INSERTION) && + !IsAtkVersionAtLeast(2, 34)) { + aAtkObj->role = ATK_ROLE_SECTION; + } + + return aAtkObj->role; +} + +static AtkAttributeSet* ConvertToAtkAttributeSet(AccAttributes* aAttributes) { + if (!aAttributes) { + return nullptr; + } + + AtkAttributeSet* objAttributeSet = nullptr; + + for (auto iter : *aAttributes) { + nsAutoString name; + iter.NameAsString(name); + if (name.Equals(u"placeholder")) { + name.AssignLiteral(u"placeholder-text"); + } + + nsAutoString value; + iter.ValueAsString(value); + + AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute)); + objAttr->name = g_strdup(NS_ConvertUTF16toUTF8(name).get()); + objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get()); + objAttributeSet = g_slist_prepend(objAttributeSet, objAttr); + } + + // libspi will free it + return objAttributeSet; +} + +AtkAttributeSet* getAttributesCB(AtkObject* aAtkObj) { + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return nullptr; + } + RefPtr<AccAttributes> attributes = acc->Attributes(); + return ConvertToAtkAttributeSet(attributes); +} + +const gchar* GetLocaleCB(AtkObject* aAtkObj) { + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return nullptr; + } + + nsAutoString locale; + acc->Language(locale); + return AccessibleWrap::ReturnString(locale); +} + +AtkObject* getParentCB(AtkObject* aAtkObj) { + if (aAtkObj->accessible_parent) return aAtkObj->accessible_parent; + + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return nullptr; + } + + Accessible* parent = acc->Parent(); + AtkObject* atkParent = parent ? GetWrapperFor(parent) : nullptr; + if (atkParent) atk_object_set_parent(aAtkObj, atkParent); + + return aAtkObj->accessible_parent; +} + +gint getChildCountCB(AtkObject* aAtkObj) { + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc || nsAccUtils::MustPrune(acc)) { + return 0; + } + return static_cast<gint>(acc->EmbeddedChildCount()); +} + +AtkObject* refChildCB(AtkObject* aAtkObj, gint aChildIndex) { + // aChildIndex should not be less than zero + if (aChildIndex < 0) { + return nullptr; + } + + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc || nsAccUtils::MustPrune(acc)) { + return nullptr; + } + Accessible* accChild = acc->EmbeddedChildAt(aChildIndex); + if (!accChild) { + return nullptr; + } + + AtkObject* childAtkObj = GetWrapperFor(accChild); + NS_ASSERTION(childAtkObj, "Fail to get AtkObj"); + if (!childAtkObj) { + return nullptr; + } + + g_object_ref(childAtkObj); + + if (aAtkObj != childAtkObj->accessible_parent) { + atk_object_set_parent(childAtkObj, aAtkObj); + } + + return childAtkObj; +} + +gint getIndexInParentCB(AtkObject* aAtkObj) { + // We don't use LocalAccessible::IndexInParent() because we don't include text + // leaf nodes as children in ATK. + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return -1; + } + if (acc->IsDoc()) { + return 0; + } + Accessible* parent = acc->Parent(); + if (!parent) { + return -1; + } + return parent->IndexOfEmbeddedChild(acc); +} + +static void TranslateStates(uint64_t aState, roles::Role aRole, + AtkStateSet* aStateSet) { + // atk doesn't have a read only state so read only things shouldn't be + // editable. However, we don't do this for list items because Gecko always + // exposes those as read only. + if ((aState & states::READONLY) && aRole != roles::LISTITEM) { + aState &= ~states::EDITABLE; + } + + // Convert every state to an entry in AtkStateMap + uint64_t bitMask = 1; + for (auto stateIndex = 0U; stateIndex < gAtkStateMapLen; stateIndex++) { + if (gAtkStateMap[stateIndex] + .atkState) { // There's potentially an ATK state for this + bool isStateOn = (aState & bitMask) != 0; + if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite) { + isStateOn = !isStateOn; + } + if (isStateOn) { + atk_state_set_add_state(aStateSet, gAtkStateMap[stateIndex].atkState); + } + } + bitMask <<= 1; + } +} + +AtkStateSet* refStateSetCB(AtkObject* aAtkObj) { + AtkStateSet* state_set = nullptr; + state_set = ATK_OBJECT_CLASS(parent_class)->ref_state_set(aAtkObj); + + if (Accessible* acc = GetInternalObj(aAtkObj)) { + TranslateStates(acc->State(), acc->Role(), state_set); + } else { + TranslateStates(states::DEFUNCT, roles::NOTHING, state_set); + } + + return state_set; +} + +static void UpdateAtkRelation(RelationType aType, Accessible* aAcc, + AtkRelationType aAtkType, + AtkRelationSet* aAtkSet) { + if (aAtkType == ATK_RELATION_NULL) return; + + AtkRelation* atkRelation = + atk_relation_set_get_relation_by_type(aAtkSet, aAtkType); + if (atkRelation) atk_relation_set_remove(aAtkSet, atkRelation); + + Relation rel(aAcc->RelationByType(aType)); + nsTArray<AtkObject*> targets; + Accessible* tempAcc = nullptr; + while ((tempAcc = rel.Next())) { + targets.AppendElement(GetWrapperFor(tempAcc)); + } + + if (targets.Length()) { + atkRelation = + atk_relation_new(targets.Elements(), targets.Length(), aAtkType); + atk_relation_set_add(aAtkSet, atkRelation); + g_object_unref(atkRelation); + } +} + +AtkRelationSet* refRelationSetCB(AtkObject* aAtkObj) { + AtkRelationSet* relation_set = + ATK_OBJECT_CLASS(parent_class)->ref_relation_set(aAtkObj); + + Accessible* acc = GetInternalObj(aAtkObj); + if (!acc) { + return relation_set; + } + +#define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \ + UpdateAtkRelation(RelationType::geckoType, acc, atkType, relation_set); + +#include "RelationTypeMap.h" + +#undef RELATIONTYPE + + return relation_set; +} + +// Check if aAtkObj is a valid MaiAtkObject, and return the AccessibleWrap +// for it. +AccessibleWrap* GetAccessibleWrap(AtkObject* aAtkObj) { + NS_ENSURE_TRUE(IS_MAI_OBJECT(aAtkObj), nullptr); + + // If we're working with an ATK object, we need to convert the Accessible + // back to an AccessibleWrap: + Accessible* storedAcc = MAI_ATK_OBJECT(aAtkObj)->acc; + if (!storedAcc) { + return nullptr; + } + auto* accWrap = static_cast<AccessibleWrap*>(storedAcc->AsLocal()); + + // Check if the accessible was deconstructed. + if (!accWrap) return nullptr; + + NS_ENSURE_TRUE(accWrap->GetAtkObject() == aAtkObj, nullptr); + + AccessibleWrap* appAccWrap = ApplicationAcc(); + if (appAccWrap != accWrap && !accWrap->IsValidObject()) { + return nullptr; + } + + return accWrap; +} + +RemoteAccessible* GetProxy(AtkObject* aObj) { + Accessible* acc = GetInternalObj(aObj); + if (!acc) { + return nullptr; + } + + return acc->AsRemote(); +} + +Accessible* GetInternalObj(AtkObject* aObj) { + if (!aObj || !IS_MAI_OBJECT(aObj)) return nullptr; + + return MAI_ATK_OBJECT(aObj)->acc; +} + +AtkObject* GetWrapperFor(Accessible* aAcc) { + if (!aAcc) { + return nullptr; + } + + if (aAcc->IsRemote()) { + return reinterpret_cast<AtkObject*>(aAcc->AsRemote()->GetWrapper()); + } + + return AccessibleWrap::GetAtkObject(aAcc->AsLocal()); +} + +static uint16_t GetInterfacesForProxy(RemoteAccessible* aProxy) { + uint16_t interfaces = 1 << MAI_INTERFACE_COMPONENT; + if (aProxy->IsHyperText()) { + interfaces |= (1 << MAI_INTERFACE_HYPERTEXT) | (1 << MAI_INTERFACE_TEXT) | + (1 << MAI_INTERFACE_EDITABLE_TEXT); + } + + if (aProxy->IsLink()) { + interfaces |= 1 << MAI_INTERFACE_HYPERLINK_IMPL; + } + + if (aProxy->HasNumericValue()) { + interfaces |= 1 << MAI_INTERFACE_VALUE; + } + + if (aProxy->IsTable()) { + interfaces |= 1 << MAI_INTERFACE_TABLE; + } + + if (aProxy->IsTableCell()) { + interfaces |= 1 << MAI_INTERFACE_TABLE_CELL; + } + + if (aProxy->IsImage()) { + interfaces |= 1 << MAI_INTERFACE_IMAGE; + } + + if (aProxy->IsDoc()) { + interfaces |= 1 << MAI_INTERFACE_DOCUMENT; + } + + if (aProxy->IsSelect()) { + interfaces |= 1 << MAI_INTERFACE_SELECTION; + } + + if (aProxy->IsActionable()) { + interfaces |= 1 << MAI_INTERFACE_ACTION; + } + + return interfaces; +} + +void a11y::ProxyCreated(RemoteAccessible* aProxy) { + MOZ_ASSERT(aProxy->RemoteParent() || aProxy->IsDoc(), + "Need parent to check for HyperLink interface"); + GType type = GetMaiAtkType(GetInterfacesForProxy(aProxy)); + NS_ASSERTION(type, "why don't we have a type!"); + + AtkObject* obj = reinterpret_cast<AtkObject*>(g_object_new(type, nullptr)); + if (!obj) return; + + atk_object_initialize(obj, static_cast<Accessible*>(aProxy)); + obj->role = ATK_ROLE_INVALID; + obj->layer = ATK_LAYER_INVALID; + aProxy->SetWrapper(reinterpret_cast<uintptr_t>(obj)); +} + +void a11y::ProxyDestroyed(RemoteAccessible* aProxy) { + auto obj = reinterpret_cast<MaiAtkObject*>(aProxy->GetWrapper()); + if (!obj) { + return; + } + + obj->Shutdown(); + g_object_unref(obj); + aProxy->SetWrapper(0); +} + +void a11y::PlatformEvent(Accessible* aTarget, uint32_t aEventType) { + AtkObject* wrapper = GetWrapperFor(aTarget); + + switch (aEventType) { + case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE: + if (aTarget->IsDoc()) { + g_signal_emit_by_name(wrapper, "load_complete"); + } + // XXX - Handle native dialog accessibles. + if (!aTarget->IsRoot() && aTarget->HasARIARole() && + aTarget->Role() == roles::DIALOG) { + guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + } + break; + case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD: + if (aTarget->IsDoc()) { + g_signal_emit_by_name(wrapper, "reload"); + } + break; + case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED: + if (aTarget->IsDoc()) { + g_signal_emit_by_name(wrapper, "load_stopped"); + } + break; + case nsIAccessibleEvent::EVENT_MENUPOPUP_START: + atk_focus_tracker_notify(wrapper); // fire extra focus event + atk_object_notify_state_change(wrapper, ATK_STATE_VISIBLE, true); + atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, true); + break; + case nsIAccessibleEvent::EVENT_MENUPOPUP_END: + atk_object_notify_state_change(wrapper, ATK_STATE_VISIBLE, false); + atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, false); + break; + case nsIAccessibleEvent::EVENT_ALERT: + // A hack using state change showing events as alert events. + atk_object_notify_state_change(wrapper, ATK_STATE_SHOWING, true); + break; + case nsIAccessibleEvent::EVENT_VALUE_CHANGE: + case nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE: + if (aTarget->HasNumericValue()) { + // Make sure this is a numeric value. Don't fire for string value + // changes (e.g. text editing) ATK values are always numeric. + g_object_notify((GObject*)wrapper, "accessible-value"); + } + break; + case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED: + g_signal_emit_by_name(wrapper, "text_selection_changed"); + break; + case nsIAccessibleEvent::EVENT_SELECTION_WITHIN: + g_signal_emit_by_name(wrapper, "selection_changed"); + break; + case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED: + g_signal_emit_by_name(wrapper, "text-attributes-changed"); + break; + case nsIAccessibleEvent::EVENT_NAME_CHANGE: { + nsAutoString newName; + aTarget->Name(newName); + MaybeFireNameChange(wrapper, newName); + break; + } + case nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE: { + guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + // Always fire a current focus event after activation. + FocusMgr()->ForceFocusEvent(); + break; + } + case nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE: { + guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + break; + } + case nsIAccessibleEvent::EVENT_WINDOW_MAXIMIZE: { + guint id = g_signal_lookup("maximize", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + break; + } + case nsIAccessibleEvent::EVENT_WINDOW_MINIMIZE: { + guint id = g_signal_lookup("minimize", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + break; + } + case nsIAccessibleEvent::EVENT_WINDOW_RESTORE: { + guint id = g_signal_lookup("restore", MAI_TYPE_ATK_OBJECT); + g_signal_emit(wrapper, id, 0); + break; + } + } +} + +void a11y::PlatformStateChangeEvent(Accessible* aTarget, uint64_t aState, + bool aEnabled) { + MaiAtkObject* atkObj = MAI_ATK_OBJECT(GetWrapperFor(aTarget)); + atkObj->FireStateChangeEvent(aState, aEnabled); +} + +void a11y::PlatformFocusEvent(Accessible* aTarget, + const LayoutDeviceIntRect& aCaretRect) { + AtkObject* wrapper = GetWrapperFor(aTarget); + + // XXX Do we really need this check? If so, do we need a similar check for + // RemoteAccessible? + if (LocalAccessible* localTarget = aTarget->AsLocal()) { + a11y::RootAccessible* rootAcc = localTarget->RootAccessible(); + if (!rootAcc || !rootAcc->IsActivated()) { + return; + } + } + + atk_focus_tracker_notify(wrapper); + atk_object_notify_state_change(wrapper, ATK_STATE_FOCUSED, true); +} + +void a11y::PlatformCaretMoveEvent(Accessible* aTarget, int32_t aOffset, + bool aIsSelectionCollapsed, + int32_t aGranularity, + const LayoutDeviceIntRect& aCaretRect, + bool aFromUser) { + AtkObject* wrapper = GetWrapperFor(aTarget); + g_signal_emit_by_name(wrapper, "text_caret_moved", aOffset); +} + +void MaiAtkObject::FireStateChangeEvent(uint64_t aState, bool aEnabled) { + auto state = aState; + int32_t stateIndex = -1; + while (state > 0) { + ++stateIndex; + state >>= 1; + } + + MOZ_ASSERT( + stateIndex >= 0 && stateIndex < static_cast<int32_t>(gAtkStateMapLen), + "No ATK state for internal state was found"); + if (stateIndex < 0 || stateIndex >= static_cast<int32_t>(gAtkStateMapLen)) { + return; + } + + if (gAtkStateMap[stateIndex].atkState != kNone) { + MOZ_ASSERT(gAtkStateMap[stateIndex].stateMapEntryType != kNoStateChange, + "State changes should not fired for this state"); + + if (gAtkStateMap[stateIndex].stateMapEntryType == kMapOpposite) { + aEnabled = !aEnabled; + } + + // Fire state change for first state if there is one to map + atk_object_notify_state_change(&parent, gAtkStateMap[stateIndex].atkState, + aEnabled); + } +} + +void a11y::PlatformTextChangeEvent(Accessible* aTarget, const nsAString& aStr, + int32_t aStart, uint32_t aLen, + bool aIsInsert, bool aFromUser) { + MaiAtkObject* atkObj = MAI_ATK_OBJECT(GetWrapperFor(aTarget)); + atkObj->FireTextChangeEvent(aStr, aStart, aLen, aIsInsert, aFromUser); +} + +#define OLD_TEXT_INSERTED "text_changed::insert" +#define OLD_TEXT_REMOVED "text_changed::delete" +static const char* oldTextChangeStrings[2][2] = { + {OLD_TEXT_REMOVED NON_USER_EVENT, OLD_TEXT_INSERTED NON_USER_EVENT}, + {OLD_TEXT_REMOVED, OLD_TEXT_INSERTED}}; + +#define TEXT_INSERTED "text-insert" +#define TEXT_REMOVED "text-remove" +#define NON_USER_DETAIL "::system" +static const char* textChangedStrings[2][2] = { + {TEXT_REMOVED NON_USER_DETAIL, TEXT_INSERTED NON_USER_DETAIL}, + {TEXT_REMOVED, TEXT_INSERTED}}; + +void MaiAtkObject::FireTextChangeEvent(const nsAString& aStr, int32_t aStart, + uint32_t aLen, bool aIsInsert, + bool aFromUser) { + if (gAvailableAtkSignals == eUnknown) { + gAvailableAtkSignals = g_signal_lookup("text-insert", G_OBJECT_TYPE(this)) + ? eHaveNewAtkTextSignals + : eNoNewAtkSignals; + } + + if (gAvailableAtkSignals == eNoNewAtkSignals) { + // XXX remove this code and the gHaveNewTextSignals check when we can + // stop supporting old atk since it doesn't really work anyway + // see bug 619002 + const char* signal_name = oldTextChangeStrings[aFromUser][aIsInsert]; + g_signal_emit_by_name(this, signal_name, aStart, aLen); + } else { + const char* signal_name = textChangedStrings[aFromUser][aIsInsert]; + g_signal_emit_by_name(this, signal_name, aStart, aLen, + NS_ConvertUTF16toUTF8(aStr).get()); + } +} + +void a11y::PlatformShowHideEvent(Accessible* aTarget, Accessible* aParent, + bool aInsert, bool aFromUser) { + AtkObject* atkObj = GetWrapperFor(aTarget); + if (!aInsert) { + // XXX - Handle native dialog accessibles. + if (!aTarget->IsRoot() && aTarget->HasARIARole() && + aTarget->Role() == roles::DIALOG) { + guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT); + g_signal_emit(atkObj, id, 0); + } + } + + MaiAtkObject* obj = MAI_ATK_OBJECT(atkObj); + obj->FireAtkShowHideEvent(GetWrapperFor(aParent), aInsert, aFromUser); +} + +#define ADD_EVENT "children_changed::add" +#define HIDE_EVENT "children_changed::remove" + +static const char* kMutationStrings[2][2] = { + {HIDE_EVENT NON_USER_EVENT, ADD_EVENT NON_USER_EVENT}, + {HIDE_EVENT, ADD_EVENT}, +}; + +void MaiAtkObject::FireAtkShowHideEvent(AtkObject* aParent, bool aIsAdded, + bool aFromUser) { + if (!aParent) { + // XXX ATK needs a parent for these events. However, we might have already + // unbound from the parent by the time we fire a hide event. Ideally, we + // need to find a way to keep the parent around, but ATK clients don't seem + // to care about these missing events. + MOZ_ASSERT(!aIsAdded); + return; + } + int32_t indexInParent = getIndexInParentCB(&this->parent); + const char* signal_name = kMutationStrings[aFromUser][aIsAdded]; + g_signal_emit_by_name(aParent, signal_name, indexInParent, this, nullptr); +} + +void a11y::PlatformSelectionEvent(Accessible*, Accessible* aWidget, uint32_t) { + MaiAtkObject* obj = MAI_ATK_OBJECT(GetWrapperFor(aWidget)); + g_signal_emit_by_name(obj, "selection_changed"); +} + +// static +void AccessibleWrap::GetKeyBinding(Accessible* aAccessible, + nsAString& aResult) { + // Return all key bindings including access key and keyboard shortcut. + + // Get access key. + nsAutoString keyBindingsStr; + KeyBinding keyBinding = aAccessible->AccessKey(); + if (!keyBinding.IsEmpty()) { + keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat); + + Accessible* parent = aAccessible->Parent(); + roles::Role role = parent ? parent->Role() : roles::NOTHING; + if (role == roles::PARENT_MENUITEM || role == roles::MENUITEM || + role == roles::RADIO_MENU_ITEM || role == roles::CHECK_MENU_ITEM) { + // It is submenu, expose keyboard shortcuts from menu hierarchy like + // "s;<Alt>f:s" + nsAutoString keysInHierarchyStr = keyBindingsStr; + do { + KeyBinding parentKeyBinding = parent->AccessKey(); + if (!parentKeyBinding.IsEmpty()) { + nsAutoString str; + parentKeyBinding.ToString(str, KeyBinding::eAtkFormat); + str.Append(':'); + + keysInHierarchyStr.Insert(str, 0); + } + } while ((parent = parent->Parent()) && parent->Role() != roles::MENUBAR); + + keyBindingsStr.Append(';'); + keyBindingsStr.Append(keysInHierarchyStr); + } + } else { + // No access key, add ';' to point this. + keyBindingsStr.Append(';'); + } + + // Get keyboard shortcut. + keyBindingsStr.Append(';'); + if (LocalAccessible* localAcc = aAccessible->AsLocal()) { + keyBinding = localAcc->KeyboardShortcut(); + if (!keyBinding.IsEmpty()) { + keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat); + } + } + aResult = keyBindingsStr; +} + +// static +Accessible* AccessibleWrap::GetColumnHeader(TableAccessible* aAccessible, + int32_t aColIdx) { + if (!aAccessible) { + return nullptr; + } + + Accessible* cell = aAccessible->CellAt(0, aColIdx); + if (!cell) { + return nullptr; + } + + // If the cell at the first row is column header then assume it is column + // header for all rows, + if (cell->Role() == roles::COLUMNHEADER) { + return cell; + } + + // otherwise get column header for the data cell at the first row. + TableCellAccessible* tableCell = cell->AsTableCell(); + if (!tableCell) { + return nullptr; + } + + AutoTArray<Accessible*, 10> headerCells; + tableCell->ColHeaderCells(&headerCells); + if (headerCells.IsEmpty()) { + return nullptr; + } + + return headerCells[0]; +} + +// static +Accessible* AccessibleWrap::GetRowHeader(TableAccessible* aAccessible, + int32_t aRowIdx) { + if (!aAccessible) { + return nullptr; + } + + Accessible* cell = aAccessible->CellAt(aRowIdx, 0); + if (!cell) { + return nullptr; + } + + // If the cell at the first column is row header then assume it is row + // header for all columns, + if (cell->Role() == roles::ROWHEADER) { + return cell; + } + + // otherwise get row header for the data cell at the first column. + TableCellAccessible* tableCell = cell->AsTableCell(); + if (!tableCell) { + return nullptr; + } + + AutoTArray<Accessible*, 10> headerCells; + tableCell->RowHeaderCells(&headerCells); + if (headerCells.IsEmpty()) { + return nullptr; + } + + return headerCells[0]; +} |