зеркало из https://github.com/mozilla/gecko-dev.git
406 строки
11 KiB
C++
406 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* 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 "Platform.h"
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#include "AccEvent.h"
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#include "Compatibility.h"
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#include "HyperTextAccessibleWrap.h"
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#include "ia2AccessibleText.h"
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#include "nsIWindowsRegKey.h"
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#include "nsIXULRuntime.h"
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#include "nsWinUtils.h"
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#include "mozilla/a11y/ProxyAccessible.h"
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#include "mozilla/mscom/ActivationContext.h"
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#include "mozilla/mscom/InterceptorLog.h"
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#include "mozilla/mscom/Registration.h"
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#include "mozilla/mscom/Utils.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/WindowsVersion.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsDirectoryServiceUtils.h"
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#include "ProxyWrappers.h"
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#if defined(MOZ_TELEMETRY_REPORTING)
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#include "mozilla/Telemetry.h"
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#endif // defined(MOZ_TELEMETRY_REPORTING)
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using namespace mozilla;
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using namespace mozilla::a11y;
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using namespace mozilla::mscom;
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static StaticAutoPtr<RegisteredProxy> gRegCustomProxy;
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static StaticAutoPtr<RegisteredProxy> gRegProxy;
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static StaticAutoPtr<RegisteredProxy> gRegAccTlb;
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static StaticAutoPtr<RegisteredProxy> gRegMiscTlb;
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static StaticRefPtr<nsIFile> gInstantiator;
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void
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a11y::PlatformInit()
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{
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nsWinUtils::MaybeStartWindowEmulation();
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ia2AccessibleText::InitTextChangeData();
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mscom::InterceptorLog::Init();
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UniquePtr<RegisteredProxy> regCustomProxy(
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mscom::RegisterProxy());
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gRegCustomProxy = regCustomProxy.release();
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UniquePtr<RegisteredProxy> regProxy(
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mscom::RegisterProxy(L"ia2marshal.dll"));
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gRegProxy = regProxy.release();
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UniquePtr<RegisteredProxy> regAccTlb(
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mscom::RegisterTypelib(L"oleacc.dll",
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RegistrationFlags::eUseSystemDirectory));
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gRegAccTlb = regAccTlb.release();
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UniquePtr<RegisteredProxy> regMiscTlb(
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mscom::RegisterTypelib(L"Accessible.tlb"));
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gRegMiscTlb = regMiscTlb.release();
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}
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void
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a11y::PlatformShutdown()
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{
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::DestroyCaret();
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nsWinUtils::ShutdownWindowEmulation();
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gRegCustomProxy = nullptr;
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gRegProxy = nullptr;
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gRegAccTlb = nullptr;
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gRegMiscTlb = nullptr;
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if (gInstantiator) {
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gInstantiator = nullptr;
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}
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}
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void
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a11y::ProxyCreated(ProxyAccessible* aProxy, uint32_t aInterfaces)
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{
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AccessibleWrap* wrapper = nullptr;
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if (aInterfaces & Interfaces::DOCUMENT) {
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wrapper = new DocProxyAccessibleWrap(aProxy);
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} else if (aInterfaces & Interfaces::HYPERTEXT) {
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wrapper = new HyperTextProxyAccessibleWrap(aProxy);
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} else {
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wrapper = new ProxyAccessibleWrap(aProxy);
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}
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wrapper->SetProxyInterfaces(aInterfaces);
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wrapper->AddRef();
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aProxy->SetWrapper(reinterpret_cast<uintptr_t>(wrapper));
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}
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void
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a11y::ProxyDestroyed(ProxyAccessible* aProxy)
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{
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AccessibleWrap* wrapper =
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reinterpret_cast<AccessibleWrap*>(aProxy->GetWrapper());
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// If aProxy is a document that was created, but
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// RecvPDocAccessibleConstructor failed then aProxy->GetWrapper() will be
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// null.
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if (!wrapper)
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return;
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if (aProxy->IsDoc() && nsWinUtils::IsWindowEmulationStarted()) {
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aProxy->AsDoc()->SetEmulatedWindowHandle(nullptr);
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}
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wrapper->Shutdown();
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aProxy->SetWrapper(0);
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wrapper->Release();
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}
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void
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a11y::ProxyEvent(ProxyAccessible* aTarget, uint32_t aEventType)
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{
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AccessibleWrap::FireWinEvent(WrapperFor(aTarget), aEventType);
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}
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void
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a11y::ProxyStateChangeEvent(ProxyAccessible* aTarget, uint64_t, bool)
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{
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AccessibleWrap::FireWinEvent(WrapperFor(aTarget),
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nsIAccessibleEvent::EVENT_STATE_CHANGE);
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}
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void
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a11y::ProxyFocusEvent(ProxyAccessible* aTarget,
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const LayoutDeviceIntRect& aCaretRect)
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{
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AccessibleWrap::UpdateSystemCaretFor(aTarget, aCaretRect);
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AccessibleWrap::FireWinEvent(WrapperFor(aTarget),
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nsIAccessibleEvent::EVENT_FOCUS);
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}
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void
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a11y::ProxyCaretMoveEvent(ProxyAccessible* aTarget,
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const LayoutDeviceIntRect& aCaretRect)
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{
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AccessibleWrap::UpdateSystemCaretFor(aTarget, aCaretRect);
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AccessibleWrap::FireWinEvent(WrapperFor(aTarget),
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nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED);
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}
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void
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a11y::ProxyTextChangeEvent(ProxyAccessible* aText, const nsString& aStr,
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int32_t aStart, uint32_t aLen, bool aInsert, bool)
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{
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AccessibleWrap* wrapper = WrapperFor(aText);
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MOZ_ASSERT(wrapper);
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if (!wrapper) {
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return;
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}
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static const bool useHandler =
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Preferences::GetBool("accessibility.handler.enabled", false) &&
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IsHandlerRegistered();
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if (useHandler) {
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wrapper->DispatchTextChangeToHandler(aInsert, aStr, aStart, aLen);
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return;
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}
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auto text = static_cast<HyperTextAccessibleWrap*>(wrapper->AsHyperText());
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if (text) {
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ia2AccessibleText::UpdateTextChangeData(text, aInsert, aStr, aStart, aLen);
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}
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uint32_t eventType = aInsert ? nsIAccessibleEvent::EVENT_TEXT_INSERTED :
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nsIAccessibleEvent::EVENT_TEXT_REMOVED;
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AccessibleWrap::FireWinEvent(wrapper, eventType);
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}
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void
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a11y::ProxyShowHideEvent(ProxyAccessible* aTarget, ProxyAccessible*, bool aInsert, bool)
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{
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uint32_t event = aInsert ? nsIAccessibleEvent::EVENT_SHOW :
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nsIAccessibleEvent::EVENT_HIDE;
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AccessibleWrap* wrapper = WrapperFor(aTarget);
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AccessibleWrap::FireWinEvent(wrapper, event);
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}
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void
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a11y::ProxySelectionEvent(ProxyAccessible* aTarget, ProxyAccessible*, uint32_t aType)
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{
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AccessibleWrap* wrapper = WrapperFor(aTarget);
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AccessibleWrap::FireWinEvent(wrapper, aType);
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}
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bool
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a11y::IsHandlerRegistered()
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{
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nsresult rv;
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nsCOMPtr<nsIWindowsRegKey> regKey =
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do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
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if (NS_FAILED(rv)) {
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return false;
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}
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nsAutoString clsid;
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GUIDToString(CLSID_AccessibleHandler, clsid);
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nsAutoString subKey;
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subKey.AppendLiteral(u"SOFTWARE\\Classes\\CLSID\\");
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subKey.Append(clsid);
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subKey.AppendLiteral(u"\\InprocHandler32");
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rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE, subKey,
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nsIWindowsRegKey::ACCESS_READ);
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if (NS_FAILED(rv)) {
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return false;
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}
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nsAutoString handlerPath;
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rv = regKey->ReadStringValue(nsAutoString(), handlerPath);
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if (NS_FAILED(rv)) {
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return false;
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}
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nsCOMPtr<nsIFile> actualHandler;
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rv = NS_NewLocalFile(handlerPath, false, getter_AddRefs(actualHandler));
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if (NS_FAILED(rv)) {
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return false;
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}
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nsCOMPtr<nsIFile> expectedHandler;
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rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(expectedHandler));
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if (NS_FAILED(rv)) {
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return false;
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}
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rv = expectedHandler->Append(NS_LITERAL_STRING("AccessibleHandler.dll"));
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if (NS_FAILED(rv)) {
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return false;
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}
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bool equal;
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rv = expectedHandler->Equals(actualHandler, &equal);
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return NS_SUCCEEDED(rv) && equal;
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}
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static bool
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GetInstantiatorExecutable(const DWORD aPid, nsIFile** aOutClientExe)
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{
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nsAutoHandle callingProcess(::OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION,
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FALSE, aPid));
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if (!callingProcess) {
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return false;
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}
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DWORD bufLen = MAX_PATH;
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UniquePtr<wchar_t[]> buf;
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while (true) {
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buf = MakeUnique<wchar_t[]>(bufLen);
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if (::QueryFullProcessImageName(callingProcess, 0, buf.get(), &bufLen)) {
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break;
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}
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DWORD lastError = ::GetLastError();
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MOZ_ASSERT(lastError == ERROR_INSUFFICIENT_BUFFER);
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if (lastError != ERROR_INSUFFICIENT_BUFFER) {
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return false;
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}
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bufLen *= 2;
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}
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nsCOMPtr<nsIFile> file;
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nsresult rv = NS_NewLocalFile(nsDependentString(buf.get(), bufLen), false,
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getter_AddRefs(file));
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if (NS_FAILED(rv)) {
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return false;
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}
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file.forget(aOutClientExe);
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return NS_SUCCEEDED(rv);
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}
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/**
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* Appends version information in the format "|a.b.c.d".
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* If there is no version information, we append nothing.
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*/
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static void
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AppendVersionInfo(nsIFile* aClientExe, nsAString& aStrToAppend)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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nsAutoString fullPath;
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nsresult rv = aClientExe->GetPath(fullPath);
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if (NS_FAILED(rv)) {
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return;
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}
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DWORD verInfoSize = ::GetFileVersionInfoSize(fullPath.get(), nullptr);
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if (!verInfoSize) {
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return;
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}
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auto verInfoBuf = MakeUnique<BYTE[]>(verInfoSize);
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if (!::GetFileVersionInfo(fullPath.get(), 0, verInfoSize, verInfoBuf.get())) {
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return;
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}
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VS_FIXEDFILEINFO* fixedInfo = nullptr;
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UINT fixedInfoLen = 0;
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if (!::VerQueryValue(verInfoBuf.get(), L"\\", (LPVOID*) &fixedInfo,
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&fixedInfoLen)) {
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return;
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}
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uint32_t major = HIWORD(fixedInfo->dwFileVersionMS);
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uint32_t minor = LOWORD(fixedInfo->dwFileVersionMS);
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uint32_t patch = HIWORD(fixedInfo->dwFileVersionLS);
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uint32_t build = LOWORD(fixedInfo->dwFileVersionLS);
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aStrToAppend.AppendLiteral(u"|");
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NS_NAMED_LITERAL_STRING(dot, ".");
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aStrToAppend.AppendInt(major);
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aStrToAppend.Append(dot);
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aStrToAppend.AppendInt(minor);
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aStrToAppend.Append(dot);
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aStrToAppend.AppendInt(patch);
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aStrToAppend.Append(dot);
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aStrToAppend.AppendInt(build);
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}
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static void
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AccumulateInstantiatorTelemetry(nsIFile* aClientExe, const nsAString& aValue)
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (!aValue.IsEmpty()) {
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#if defined(MOZ_TELEMETRY_REPORTING)
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Telemetry::ScalarSet(Telemetry::ScalarID::A11Y_INSTANTIATORS,
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aValue);
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#endif // defined(MOZ_TELEMETRY_REPORTING)
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CrashReporter::
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AnnotateCrashReport(NS_LITERAL_CSTRING("AccessibilityClient"),
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NS_ConvertUTF16toUTF8(aValue));
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}
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}
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static void
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GatherInstantiatorTelemetry(nsIFile* aClientExe)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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nsString value;
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nsresult rv = aClientExe->GetLeafName(value);
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if (NS_SUCCEEDED(rv)) {
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AppendVersionInfo(aClientExe, value);
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}
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nsCOMPtr<nsIFile> ref(aClientExe);
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nsCOMPtr<nsIRunnable> runnable(
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NS_NewRunnableFunction("a11y::AccumulateInstantiatorTelemetry",
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[ref, value]() -> void {
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AccumulateInstantiatorTelemetry(ref, value);
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}));
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// Now that we've (possibly) obtained version info, send the resulting
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// string back to the main thread to accumulate in telemetry.
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NS_DispatchToMainThread(runnable);
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}
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void
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a11y::SetInstantiator(const uint32_t aPid)
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{
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nsCOMPtr<nsIFile> clientExe;
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if (!GetInstantiatorExecutable(aPid, getter_AddRefs(clientExe))) {
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#if defined(MOZ_TELEMETRY_REPORTING)
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AccumulateInstantiatorTelemetry(nullptr, NS_LITERAL_STRING("(Failed to retrieve client image name)"));
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#endif // defined(MOZ_TELEMETRY_REPORTING)
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return;
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}
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gInstantiator = clientExe;
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nsCOMPtr<nsIRunnable> runnable(
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NS_NewRunnableFunction("a11y::GatherInstantiatorTelemetry",
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[clientExe]() -> void {
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GatherInstantiatorTelemetry(clientExe);
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}));
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nsCOMPtr<nsIThread> telemetryThread;
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NS_NewThread(getter_AddRefs(telemetryThread), runnable);
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}
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bool
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a11y::GetInstantiator(nsIFile** aOutInstantiator)
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{
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if (!gInstantiator) {
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return false;
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}
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return NS_SUCCEEDED(gInstantiator->Clone(aOutInstantiator));
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}
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