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/* 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 "xpcAccessibilityService.h"
#include "nsAccessiblePivot.h"
#include "nsAccessibilityService.h"
#ifdef A11Y_LOG
#include "Logging.h"
#endif
using namespace mozilla;
using namespace mozilla::a11y;
using namespace mozilla::dom;
xpcAccessibilityService *xpcAccessibilityService::gXPCAccessibilityService = nullptr;
////////////////////////////////////////////////////////////////////////////////
// nsISupports
void
xpcAccessibilityService::ShutdownCallback(nsITimer* aTimer, void* aClosure)
{
MaybeShutdownAccService(nsAccessibilityService::eXPCOM);
xpcAccessibilityService* xpcAccService =
reinterpret_cast<xpcAccessibilityService*>(aClosure);
if (xpcAccService->mShutdownTimer) {
xpcAccService->mShutdownTimer->Cancel();
xpcAccService->mShutdownTimer = nullptr;
}
}
NS_IMETHODIMP_(MozExternalRefCountType)
xpcAccessibilityService::AddRef(void)
{
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(xpcAccessibilityService)
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt");
if (!mRefCnt.isThreadSafe)
NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
nsrefcnt count = ++mRefCnt;
NS_LOG_ADDREF(this, count, "xpcAccessibilityService", sizeof(*this));
if (mRefCnt > 1) {
GetOrCreateAccService(nsAccessibilityService::eXPCOM);
}
return count;
}
NS_IMETHODIMP_(MozExternalRefCountType)
xpcAccessibilityService::Release(void)
{
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release");
if (!mRefCnt.isThreadSafe) {
NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
}
nsrefcnt count = --mRefCnt;
NS_LOG_RELEASE(this, count, "xpcAccessibilityService");
if (count == 0) {
if (!mRefCnt.isThreadSafe) {
NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
}
mRefCnt = 1; /* stabilize */
delete (this);
return 0;
}
// When ref count goes down to 1 (held internally as a static reference),
// it means that there are no more external references to the
// xpcAccessibilityService and we can attempt to shut down acceessiblity
// service.
if (count == 1 && !mShutdownTimer) {
mShutdownTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (mShutdownTimer) {
mShutdownTimer->InitWithFuncCallback(ShutdownCallback, this, 100,
nsITimer::TYPE_ONE_SHOT);
}
}
return count;
}
NS_IMPL_QUERY_INTERFACE(xpcAccessibilityService, nsIAccessibilityService,
nsIAccessibleRetrieval)
NS_IMETHODIMP
xpcAccessibilityService::GetApplicationAccessible(nsIAccessible** aAccessibleApplication)
{
NS_ENSURE_ARG_POINTER(aAccessibleApplication);
NS_IF_ADDREF(*aAccessibleApplication = XPCApplicationAcc());
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetAccessibleFor(nsIDOMNode *aNode,
nsIAccessible **aAccessible)
{
NS_ENSURE_ARG_POINTER(aAccessible);
*aAccessible = nullptr;
if (!aNode) {
return NS_OK;
}
nsCOMPtr<nsINode> node(do_QueryInterface(aNode));
if (!node) {
return NS_ERROR_INVALID_ARG;
}
DocAccessible* document = GetAccService()->GetDocAccessible(node->OwnerDoc());
if (document) {
NS_IF_ADDREF(*aAccessible = ToXPC(document->GetAccessible(node)));
}
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetStringRole(uint32_t aRole, nsAString& aString)
{
GetAccService()->GetStringRole(aRole, aString);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetStringStates(uint32_t aState, uint32_t aExtraState,
nsISupports **aStringStates)
{
GetAccService()->GetStringStates(aState, aExtraState, aStringStates);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetStringEventType(uint32_t aEventType,
nsAString& aString)
{
GetAccService()->GetStringEventType(aEventType, aString);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetStringRelationType(uint32_t aRelationType,
nsAString& aString)
{
GetAccService()->GetStringRelationType(aRelationType, aString);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::GetAccessibleFromCache(nsIDOMNode* aNode,
nsIAccessible** aAccessible)
{
NS_ENSURE_ARG_POINTER(aAccessible);
*aAccessible = nullptr;
if (!aNode) {
return NS_OK;
}
nsCOMPtr<nsINode> node(do_QueryInterface(aNode));
if (!node) {
return NS_ERROR_INVALID_ARG;
}
// Search for an accessible in each of our per document accessible object
// caches. If we don't find it, and the given node is itself a document, check
// our cache of document accessibles (document cache). Note usually shutdown
// document accessibles are not stored in the document cache, however an
// "unofficially" shutdown document (i.e. not from DocManager) can still
// exist in the document cache.
Accessible* accessible = GetAccService()->FindAccessibleInCache(node);
if (!accessible) {
nsCOMPtr<nsIDocument> document(do_QueryInterface(node));
if (document) {
accessible = mozilla::a11y::GetExistingDocAccessible(document);
}
}
NS_IF_ADDREF(*aAccessible = ToXPC(accessible));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::CreateAccessiblePivot(nsIAccessible* aRoot,
nsIAccessiblePivot** aPivot)
{
NS_ENSURE_ARG_POINTER(aPivot);
NS_ENSURE_ARG(aRoot);
*aPivot = nullptr;
Accessible* accessibleRoot = aRoot->ToInternalAccessible();
NS_ENSURE_TRUE(accessibleRoot, NS_ERROR_INVALID_ARG);
nsAccessiblePivot* pivot = new nsAccessiblePivot(accessibleRoot);
NS_ADDREF(*aPivot = pivot);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::SetLogging(const nsACString& aModules)
{
#ifdef A11Y_LOG
logging::Enable(PromiseFlatCString(aModules));
#endif
return NS_OK;
}
NS_IMETHODIMP
xpcAccessibilityService::IsLogged(const nsAString& aModule, bool* aIsLogged)
{
NS_ENSURE_ARG_POINTER(aIsLogged);
*aIsLogged = false;
#ifdef A11Y_LOG
*aIsLogged = logging::IsEnabled(aModule);
#endif
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// NS_GetAccessibilityService
////////////////////////////////////////////////////////////////////////////////
nsresult
NS_GetAccessibilityService(nsIAccessibilityService** aResult)
{
NS_ENSURE_TRUE(aResult, NS_ERROR_NULL_POINTER);
*aResult = nullptr;
GetOrCreateAccService(nsAccessibilityService::eXPCOM);
xpcAccessibilityService* service = new xpcAccessibilityService();
NS_ENSURE_TRUE(service, NS_ERROR_OUT_OF_MEMORY);
xpcAccessibilityService::gXPCAccessibilityService = service;
NS_ADDREF(*aResult = service);
return NS_OK;
}
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