120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AccCollector.h"
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#include "Accessible.h"
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// nsAccCollector
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////////////////////////////////////////////////////////////////////////////////
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AccCollector::
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AccCollector(Accessible* aRoot, filters::FilterFuncPtr aFilterFunc) :
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mFilterFunc(aFilterFunc), mRoot(aRoot), mRootChildIdx(0)
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{
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}
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AccCollector::~AccCollector()
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{
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}
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uint32_t
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AccCollector::Count()
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{
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EnsureNGetIndex(nullptr);
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return mObjects.Length();
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}
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Accessible*
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AccCollector::GetAccessibleAt(uint32_t aIndex)
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{
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Accessible* accessible = mObjects.SafeElementAt(aIndex, nullptr);
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if (accessible)
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return accessible;
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return EnsureNGetObject(aIndex);
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}
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int32_t
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AccCollector::GetIndexAt(Accessible* aAccessible)
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{
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int32_t index = mObjects.IndexOf(aAccessible);
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if (index != -1)
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return index;
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return EnsureNGetIndex(aAccessible);
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsAccCollector protected
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Accessible*
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AccCollector::EnsureNGetObject(uint32_t aIndex)
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{
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uint32_t childCount = mRoot->ChildCount();
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while (mRootChildIdx < childCount) {
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Accessible* child = mRoot->GetChildAt(mRootChildIdx++);
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if (!(mFilterFunc(child) & filters::eMatch))
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continue;
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AppendObject(child);
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if (mObjects.Length() - 1 == aIndex)
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return mObjects[aIndex];
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}
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return nullptr;
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}
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int32_t
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AccCollector::EnsureNGetIndex(Accessible* aAccessible)
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{
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uint32_t childCount = mRoot->ChildCount();
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while (mRootChildIdx < childCount) {
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Accessible* child = mRoot->GetChildAt(mRootChildIdx++);
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if (!(mFilterFunc(child) & filters::eMatch))
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continue;
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AppendObject(child);
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if (child == aAccessible)
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return mObjects.Length() - 1;
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}
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return -1;
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}
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void
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AccCollector::AppendObject(Accessible* aAccessible)
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{
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mObjects.AppendElement(aAccessible);
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}
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////////////////////////////////////////////////////////////////////////////////
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// EmbeddedObjCollector
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////////////////////////////////////////////////////////////////////////////////
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int32_t
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EmbeddedObjCollector::GetIndexAt(Accessible* aAccessible)
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{
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if (aAccessible->mParent != mRoot)
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return -1;
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MOZ_ASSERT(!aAccessible->IsProxy());
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if (aAccessible->mInt.mIndexOfEmbeddedChild != -1)
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return aAccessible->mInt.mIndexOfEmbeddedChild;
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return mFilterFunc(aAccessible) & filters::eMatch ?
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EnsureNGetIndex(aAccessible) : -1;
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}
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void
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EmbeddedObjCollector::AppendObject(Accessible* aAccessible)
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{
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MOZ_ASSERT(!aAccessible->IsProxy());
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aAccessible->mInt.mIndexOfEmbeddedChild = mObjects.Length();
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mObjects.AppendElement(aAccessible);
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}
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