Emilio Cobos Álvarez
24211cd4e2
Autogenerated with:
cp dom/.clang-format accessible/ && mach format accessible/**.{cpp,h,mm}
Manual fixes:
* Atk individual includes need to become atk/atk.h because otherwise some symbols incorrectly get hidden visibility.
Differential Revision: https://phabricator.services.mozilla.com/D311692
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/* 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 "MsaaIdGenerator.h"
|
|
|
|
#include "MsaaAccessible.h"
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/ClearOnShutdown.h"
|
|
#include "nsAccessibilityService.h"
|
|
|
|
namespace mozilla {
|
|
namespace a11y {
|
|
|
|
uint32_t MsaaIdGenerator::GetID() {
|
|
if (!mGetIDCalled) {
|
|
mGetIDCalled = true;
|
|
// this is a static instance, so capturing this here is safe.
|
|
RunOnShutdown([this] {
|
|
if (mReleaseIDTimer) {
|
|
mReleaseIDTimer->Cancel();
|
|
ReleasePendingIDs();
|
|
}
|
|
});
|
|
}
|
|
uint32_t id = mIDSet.GetID();
|
|
MOZ_ASSERT(id <= ((1UL << kNumFullIDBits) - 1UL));
|
|
return ~id;
|
|
}
|
|
|
|
void MsaaIdGenerator::ReleasePendingIDs() {
|
|
for (auto id : mIDsToRelease) {
|
|
mIDSet.ReleaseID(~id);
|
|
}
|
|
mIDsToRelease.Clear();
|
|
mReleaseIDTimer = nullptr;
|
|
}
|
|
|
|
void MsaaIdGenerator::ReleasePendingIdsCallback(nsITimer* aTimer,
|
|
void* aClosure) {
|
|
MsaaIdGenerator* gen = (MsaaIdGenerator*)aClosure;
|
|
gen->ReleasePendingIDs();
|
|
}
|
|
|
|
bool MsaaIdGenerator::ReleaseID(uint32_t aID) {
|
|
MOZ_ASSERT(aID != MsaaAccessible::kNoID);
|
|
// Releasing an id means it can be reused. Reusing ids too quickly can
|
|
// cause problems for clients which process events asynchronously.
|
|
// Therefore, we release ids after a short delay. This doesn't seem to be
|
|
// necessary when the cache is disabled, perhaps because the COM runtime
|
|
// holds references to our objects for longer.
|
|
if (nsAccessibilityService::IsShutdown()) {
|
|
// If accessibility is shut down, no more Accessibles will be created.
|
|
// Also, if the service is shut down, it's possible XPCOM is also shutting
|
|
// down, in which case timers won't work. Thus, we release the id
|
|
// immediately.
|
|
mIDSet.ReleaseID(~aID);
|
|
return true;
|
|
}
|
|
const uint32_t kReleaseDelay = 1000;
|
|
mIDsToRelease.AppendElement(aID);
|
|
if (!mReleaseIDTimer) {
|
|
mReleaseIDTimer = NS_NewTimer();
|
|
}
|
|
// mReleaseIDTimer is cancelled on shutdown and this is a static instance,
|
|
// so capturing this here is safe.
|
|
mReleaseIDTimer->InitWithNamedFuncCallback(
|
|
ReleasePendingIdsCallback, this, kReleaseDelay, nsITimer::TYPE_ONE_SHOT,
|
|
"a11y::MsaaIdGenerator::ReleaseIDDelayed"_ns);
|
|
|
|
return true;
|
|
}
|
|
|
|
void MsaaIdGenerator::ReleaseID(NotNull<MsaaAccessible*> aMsaaAcc) {
|
|
ReleaseID(aMsaaAcc->GetExistingID());
|
|
}
|
|
|
|
} // namespace a11y
|
|
} // namespace mozilla
|