STDMETHODIMP
ia2Accessible::get_relation(long aRelationIndex,
IAccessibleRelation** aRelation)
{
if (!aRelation || aRelationIndex < 0)
return E_INVALIDARG;
*aRelation = nullptr;
AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
if (acc->IsDefunct())
return CO_E_OBJNOTCONNECTED;
MOZ_ASSERT(!acc->IsProxy());
long relIdx = 0;
for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
if (sRelationTypePairs[idx].second == IA2_RELATION_NULL)
continue;
RelationType relationType = sRelationTypePairs[idx].first;
Relation rel = acc->RelationByType(relationType);
RefPtr<ia2AccessibleRelation> ia2Relation =
new ia2AccessibleRelation(relationType, &rel);
if (ia2Relation->HasTargets()) {
if (relIdx == aRelationIndex) {
ia2Relation.forget(aRelation);
return S_OK;
}
relIdx++;
}
}
return E_INVALIDARG;
}
STDMETHODIMP
ia2Accessible::get_relations(long aMaxRelations,
IAccessibleRelation** aRelation,
long *aNRelations)
{
if (!aRelation || !aNRelations || aMaxRelations <= 0)
return E_INVALIDARG;
*aNRelations = 0;
AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
if (acc->IsDefunct())
return CO_E_OBJNOTCONNECTED;
MOZ_ASSERT(!acc->IsProxy());
for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs) &&
*aNRelations < aMaxRelations; idx++) {
if (sRelationTypePairs[idx].second == IA2_RELATION_NULL)
continue;
RelationType relationType = sRelationTypePairs[idx].first;
Relation rel = acc->RelationByType(relationType);
RefPtr<ia2AccessibleRelation> ia2Rel =
new ia2AccessibleRelation(relationType, &rel);
if (ia2Rel->HasTargets()) {
ia2Rel.forget(aRelation + (*aNRelations));
(*aNRelations)++;
}
}
return S_OK;
}
AtkRelationSet *
refRelationSetCB(AtkObject *aAtkObj)
{
AtkRelationSet* relation_set =
ATK_OBJECT_CLASS(parent_class)->ref_relation_set(aAtkObj);
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap)
return relation_set;
// Keep in sync with AtkRelationType enum.
static const uint32_t relationTypes[] = {
nsIAccessibleRelation::RELATION_CONTROLLED_BY,
nsIAccessibleRelation::RELATION_CONTROLLER_FOR,
nsIAccessibleRelation::RELATION_LABEL_FOR,
nsIAccessibleRelation::RELATION_LABELLED_BY,
nsIAccessibleRelation::RELATION_MEMBER_OF,
nsIAccessibleRelation::RELATION_NODE_CHILD_OF,
nsIAccessibleRelation::RELATION_FLOWS_TO,
nsIAccessibleRelation::RELATION_FLOWS_FROM,
nsIAccessibleRelation::RELATION_SUBWINDOW_OF,
nsIAccessibleRelation::RELATION_EMBEDS,
nsIAccessibleRelation::RELATION_EMBEDDED_BY,
nsIAccessibleRelation::RELATION_POPUP_FOR,
nsIAccessibleRelation::RELATION_PARENT_WINDOW_OF,
nsIAccessibleRelation::RELATION_DESCRIBED_BY,
nsIAccessibleRelation::RELATION_DESCRIPTION_FOR,
nsIAccessibleRelation::RELATION_NODE_PARENT_OF
};
for (uint32_t i = 0; i < ArrayLength(relationTypes); i++) {
// Shift to 1 to skip ATK_RELATION_NULL.
AtkRelationType atkType = static_cast<AtkRelationType>(i + 1);
AtkRelation* atkRelation =
atk_relation_set_get_relation_by_type(relation_set, atkType);
if (atkRelation)
atk_relation_set_remove(relation_set, atkRelation);
Relation rel(accWrap->RelationByType(relationTypes[i]));
nsTArray<AtkObject*> targets;
Accessible* tempAcc = nullptr;
while ((tempAcc = rel.Next()))
targets.AppendElement(AccessibleWrap::GetAtkObject(tempAcc));
if (targets.Length()) {
atkRelation = atk_relation_new(targets.Elements(), targets.Length(), atkType);
atk_relation_set_add(relation_set, atkRelation);
g_object_unref(atkRelation);
}
}
return relation_set;
}
STDMETHODIMP
ia2Accessible::get_relationTargetsOfType(BSTR aType,
long aMaxTargets,
IUnknown*** aTargets,
long* aNTargets)
{
if (!aTargets || !aNTargets || aMaxTargets < 0)
return E_INVALIDARG;
*aNTargets = 0;
Maybe<RelationType> relationType;
for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
if (wcscmp(aType, sRelationTypePairs[idx].second) == 0) {
relationType.emplace(sRelationTypePairs[idx].first);
break;
}
}
if (!relationType)
return E_INVALIDARG;
AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
if (acc->IsDefunct())
return CO_E_OBJNOTCONNECTED;
nsTArray<Accessible*> targets;
MOZ_ASSERT(!acc->IsProxy());
Relation rel = acc->RelationByType(*relationType);
Accessible* target = nullptr;
while ((target = rel.Next()) &&
static_cast<long>(targets.Length()) <= aMaxTargets) {
targets.AppendElement(target);
}
*aNTargets = targets.Length();
*aTargets = static_cast<IUnknown**>(
::CoTaskMemAlloc(sizeof(IUnknown*) * *aNTargets));
if (!*aTargets)
return E_OUTOFMEMORY;
for (int32_t i = 0; i < *aNTargets; i++) {
AccessibleWrap* target= static_cast<AccessibleWrap*>(targets[i]);
(*aTargets)[i] = static_cast<IAccessible2*>(target);
(*aTargets)[i]->AddRef();
}
return S_OK;
}
AtkRelationSet *
refRelationSetCB(AtkObject *aAtkObj)
{
AtkRelationSet* relation_set =
ATK_OBJECT_CLASS(parent_class)->ref_relation_set(aAtkObj);
AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
if (!accWrap)
return relation_set;
PRUint32 relationTypes[] = {
nsIAccessibleRelation::RELATION_LABELLED_BY,
nsIAccessibleRelation::RELATION_LABEL_FOR,
nsIAccessibleRelation::RELATION_NODE_CHILD_OF,
nsIAccessibleRelation::RELATION_CONTROLLED_BY,
nsIAccessibleRelation::RELATION_CONTROLLER_FOR,
nsIAccessibleRelation::RELATION_EMBEDS,
nsIAccessibleRelation::RELATION_FLOWS_TO,
nsIAccessibleRelation::RELATION_FLOWS_FROM,
nsIAccessibleRelation::RELATION_DESCRIBED_BY,
nsIAccessibleRelation::RELATION_DESCRIPTION_FOR,
};
for (PRUint32 i = 0; i < ArrayLength(relationTypes); i++) {
AtkRelationType atkType = static_cast<AtkRelationType>(relationTypes[i]);
AtkRelation* atkRelation =
atk_relation_set_get_relation_by_type(relation_set, atkType);
if (atkRelation)
atk_relation_set_remove(relation_set, atkRelation);
Relation rel(accWrap->RelationByType(relationTypes[i]));
nsTArray<AtkObject*> targets;
Accessible* tempAcc = nsnull;
while ((tempAcc = rel.Next()))
targets.AppendElement(AccessibleWrap::GetAtkObject(tempAcc));
if (targets.Length()) {
atkRelation = atk_relation_new(targets.Elements(), targets.Length(), atkType);
atk_relation_set_add(relation_set, atkRelation);
g_object_unref(atkRelation);
}
}
return relation_set;
}
STDMETHODIMP
ia2Accessible::get_nRelations(long* aNRelations) {
if (!aNRelations) return E_INVALIDARG;
*aNRelations = 0;
AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
MOZ_ASSERT(!acc->IsProxy());
for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
if (sRelationTypePairs[idx].second == IA2_RELATION_NULL) continue;
Relation rel = acc->RelationByType(sRelationTypePairs[idx].first);
if (rel.Next()) (*aNRelations)++;
}
return S_OK;
}