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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "MsaaDocAccessible.h"
#include "MsaaDocAccessible.h"
#include "DocAccessibleChild.h"
#include "mozilla/a11y/DocAccessibleParent.h"
#include "nsAccessibilityService.h"
#include "nsAccUtils.h"
#include "nsWinUtils.h"
#include "mozilla/a11y/Role.h"
#include "ISimpleDOM.h"
using namespace mozilla;
using namespace mozilla::a11y;
DocAccessible* MsaaDocAccessible::DocAcc() {
return static_cast<DocAccessible*>(LocalAcc());
}
/* static */
MsaaDocAccessible* MsaaDocAccessible::GetFrom(DocAccessible* aDoc) {
return static_cast<MsaaDocAccessible*>(MsaaAccessible::GetFrom(aDoc));
}
/* static */
MsaaDocAccessible* MsaaDocAccessible::GetFrom(DocAccessibleParent* aDoc) {
return static_cast<MsaaDocAccessible*>(
reinterpret_cast<MsaaAccessible*>(aDoc->GetWrapper()));
}
/* static */
MsaaDocAccessible* MsaaDocAccessible::GetFromOwned(Accessible* aAcc) {
if (RemoteAccessible* remoteAcc = aAcc->AsRemote()) {
DocAccessibleParent* doc = remoteAcc->Document();
if (!doc) {
return nullptr;
}
return MsaaDocAccessible::GetFrom(doc);
}
DocAccessible* doc = aAcc->AsLocal()->Document();
if (!doc) {
return nullptr;
}
return MsaaDocAccessible::GetFrom(doc);
}
// IUnknown
IMPL_IUNKNOWN_QUERY_HEAD(MsaaDocAccessible)
IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(ia2AccessibleHypertext)
STDMETHODIMP
MsaaDocAccessible::get_accParent(
/* [retval][out] */ IDispatch __RPC_FAR* __RPC_FAR* ppdispParent) {
if (!mAcc) {
return CO_E_OBJNOTCONNECTED;
}
if (mAcc->IsRemote()) {
DocAccessibleParent* remoteDoc = mAcc->AsRemote()->AsDoc();
if (nsWinUtils::IsWindowEmulationStarted() && remoteDoc->IsTopLevel()) {
// Window emulation is enabled and this is a top level document. Return
// window system accessible object.
HWND hwnd = remoteDoc->GetEmulatedWindowHandle();
MOZ_ASSERT(hwnd);
if (hwnd &&
SUCCEEDED(::CreateStdAccessibleObject(
hwnd, OBJID_WINDOW, IID_IAccessible, (void**)ppdispParent))) {
return S_OK;
}
}
return MsaaAccessible::get_accParent(ppdispParent);
}
DocAccessible* docAcc = DocAcc();
MOZ_ASSERT(docAcc);
// Return window system accessible object for root document accessibles, as
// well as tab document accessibles if window emulation is enabled.
MOZ_ASSERT(XRE_IsParentProcess());
if ((!docAcc->ParentDocument() ||
(nsWinUtils::IsWindowEmulationStarted() &&
nsCoreUtils::IsTopLevelContentDocInProcess(docAcc->DocumentNode())))) {
HWND hwnd = static_cast<HWND>(docAcc->GetNativeWindow());
if (hwnd &&
SUCCEEDED(::CreateStdAccessibleObject(
hwnd, OBJID_WINDOW, IID_IAccessible, (void**)ppdispParent))) {
return S_OK;
}
}
return MsaaAccessible::get_accParent(ppdispParent);
}
STDMETHODIMP
MsaaDocAccessible::get_accValue(VARIANT aVarChild, BSTR __RPC_FAR* aValue) {
if (!aValue) return E_INVALIDARG;
*aValue = nullptr;
// For backwards-compat, we still support old MSAA hack to provide URL in
// accValue Check for real value first
HRESULT hr = MsaaAccessible::get_accValue(aVarChild, aValue);
if (FAILED(hr) || *aValue || aVarChild.lVal != CHILDID_SELF) return hr;
// MsaaAccessible::get_accValue should have failed (and thus we should have
// returned early) if the Accessible is dead.
MOZ_ASSERT(mAcc);
// If document is being used to create a widget, don't use the URL hack
roles::Role role = mAcc->Role();
if (role != roles::DOCUMENT && role != roles::APPLICATION &&
role != roles::DIALOG && role != roles::ALERT &&
role != roles::NON_NATIVE_DOCUMENT)
return hr;
nsAutoString url;
nsAccUtils::DocumentURL(mAcc, url);
if (url.IsEmpty()) return S_FALSE;
*aValue = ::SysAllocStringLen(url.get(), url.Length());
return *aValue ? S_OK : E_OUTOFMEMORY;
}
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