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-rw-r--r--accessible/windows/sdn/sdnAccessible.cpp522
1 files changed, 522 insertions, 0 deletions
diff --git a/accessible/windows/sdn/sdnAccessible.cpp b/accessible/windows/sdn/sdnAccessible.cpp
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+++ b/accessible/windows/sdn/sdnAccessible.cpp
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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 "sdnAccessible-inl.h"
+#include "ISimpleDOM_i.c"
+
+#include "DocAccessibleWrap.h"
+
+#include "nsAttrName.h"
+#include "nsCoreUtils.h"
+#include "nsIAccessibleTypes.h"
+#include "nsICSSDeclaration.h"
+#include "nsNameSpaceManager.h"
+#include "nsServiceManagerUtils.h"
+#include "nsWinUtils.h"
+#include "nsRange.h"
+
+#include "mozilla/dom/BorrowedAttrInfo.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/PresShell.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+sdnAccessible::~sdnAccessible() {
+ if (mUniqueId.isSome()) {
+ MsaaAccessible::ReleaseChildID(WrapNotNull(this));
+ }
+}
+
+STDMETHODIMP
+sdnAccessible::QueryInterface(REFIID aREFIID, void** aInstancePtr) {
+ if (!aInstancePtr) return E_FAIL;
+ *aInstancePtr = nullptr;
+
+ if (aREFIID == IID_IClientSecurity) {
+ // Some code might QI(IID_IClientSecurity) to detect whether or not we are
+ // a proxy. Right now that can potentially happen off the main thread, so we
+ // look for this condition immediately so that we don't trigger other code
+ // that might not be thread-safe.
+ return E_NOINTERFACE;
+ }
+
+ if (aREFIID == IID_ISimpleDOMNode) {
+ *aInstancePtr = static_cast<ISimpleDOMNode*>(this);
+ AddRef();
+ return S_OK;
+ }
+
+ MsaaAccessible* accessible = GetMsaa();
+ if (accessible) return accessible->QueryInterface(aREFIID, aInstancePtr);
+
+ // IUnknown* is the canonical one if and only if this accessible doesn't have
+ // an accessible.
+ if (aREFIID == IID_IUnknown) {
+ *aInstancePtr = static_cast<ISimpleDOMNode*>(this);
+ AddRef();
+ return S_OK;
+ }
+
+ return E_NOINTERFACE;
+}
+
+STDMETHODIMP
+sdnAccessible::get_nodeInfo(BSTR __RPC_FAR* aNodeName,
+ short __RPC_FAR* aNameSpaceID,
+ BSTR __RPC_FAR* aNodeValue,
+ unsigned int __RPC_FAR* aNumChildren,
+ unsigned int __RPC_FAR* aUniqueID,
+ unsigned short __RPC_FAR* aNodeType) {
+ if (!aNodeName || !aNameSpaceID || !aNodeValue || !aNumChildren ||
+ !aUniqueID || !aNodeType)
+ return E_INVALIDARG;
+
+ *aNodeName = nullptr;
+ *aNameSpaceID = 0;
+ *aNodeValue = nullptr;
+ *aNumChildren = 0;
+ *aUniqueID = 0;
+ *aNodeType = 0;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+ // This is a unique ID for every content node. The 3rd party accessibility
+ // application can compare this to the childID we return for events such as
+ // focus events, to correlate back to data nodes in their internal object
+ // model.
+ MsaaAccessible* accessible = GetMsaa();
+ if (accessible) {
+ *aUniqueID = MsaaAccessible::GetChildIDFor(accessible->Acc());
+ } else {
+ if (mUniqueId.isNothing()) {
+ MsaaAccessible::AssignChildIDTo(WrapNotNull(this));
+ }
+ MOZ_ASSERT(mUniqueId.isSome());
+ *aUniqueID = mUniqueId.value();
+ }
+
+ if (!mNode) {
+ RemoteAccessible* remoteAcc = accessible->Acc()->AsRemote();
+ MOZ_ASSERT(remoteAcc);
+ if (remoteAcc->IsText()) {
+ *aNodeType = nsINode::TEXT_NODE;
+ } else if (remoteAcc->IsDoc()) {
+ *aNodeType = nsINode::DOCUMENT_NODE;
+ } else {
+ *aNodeType = nsINode::ELEMENT_NODE;
+ }
+ if (nsAtom* tag = remoteAcc->TagName()) {
+ nsAutoString nodeName;
+ tag->ToString(nodeName);
+ *aNodeName = ::SysAllocString(nodeName.get());
+ }
+ return S_OK;
+ }
+
+ uint16_t nodeType = mNode->NodeType();
+ *aNodeType = static_cast<unsigned short>(nodeType);
+
+ if (*aNodeType != NODETYPE_TEXT) {
+ *aNodeName = ::SysAllocString(mNode->NodeName().get());
+ }
+
+ nsAutoString nodeValue;
+ mNode->GetNodeValue(nodeValue);
+ *aNodeValue = ::SysAllocString(nodeValue.get());
+
+ *aNameSpaceID = mNode->IsContent()
+ ? static_cast<short>(mNode->AsContent()->GetNameSpaceID())
+ : 0;
+
+ *aNumChildren = mNode->GetChildCount();
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_attributes(unsigned short aMaxAttribs,
+ BSTR __RPC_FAR* aAttribNames,
+ short __RPC_FAR* aNameSpaceIDs,
+ BSTR __RPC_FAR* aAttribValues,
+ unsigned short __RPC_FAR* aNumAttribs) {
+ if (!aAttribNames || !aNameSpaceIDs || !aAttribValues || !aNumAttribs)
+ return E_INVALIDARG;
+
+ *aNumAttribs = 0;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ if (!mNode->IsElement()) return S_FALSE;
+
+ dom::Element* elm = mNode->AsElement();
+ uint32_t numAttribs = elm->GetAttrCount();
+ if (numAttribs > aMaxAttribs) numAttribs = aMaxAttribs;
+
+ *aNumAttribs = static_cast<unsigned short>(numAttribs);
+
+ for (uint32_t index = 0; index < numAttribs; index++) {
+ aNameSpaceIDs[index] = 0;
+ aAttribValues[index] = aAttribNames[index] = nullptr;
+ nsAutoString attributeValue;
+
+ dom::BorrowedAttrInfo attr = elm->GetAttrInfoAt(index);
+ attr.mValue->ToString(attributeValue);
+
+ aNameSpaceIDs[index] = static_cast<short>(attr.mName->NamespaceID());
+ aAttribNames[index] =
+ ::SysAllocString(attr.mName->LocalName()->GetUTF16String());
+ aAttribValues[index] = ::SysAllocString(attributeValue.get());
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_attributesForNames(unsigned short aMaxAttribs,
+ BSTR __RPC_FAR* aAttribNames,
+ short __RPC_FAR* aNameSpaceID,
+ BSTR __RPC_FAR* aAttribValues) {
+ if (!aAttribNames || !aNameSpaceID || !aAttribValues) return E_INVALIDARG;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ // NVDA expects this to succeed for MathML and won't call innerHTML if this
+ // fails. Therefore, return S_FALSE here instead of E_NOTIMPL, indicating
+ // that the attributes aren't present.
+ return S_FALSE;
+ }
+
+ if (!mNode->IsElement()) return S_FALSE;
+
+ dom::Element* domElement = mNode->AsElement();
+ nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
+
+ int32_t index = 0;
+ for (index = 0; index < aMaxAttribs; index++) {
+ aAttribValues[index] = nullptr;
+ if (aAttribNames[index]) {
+ nsAutoString attributeValue, nameSpaceURI;
+ nsAutoString attributeName(
+ nsDependentString(static_cast<const wchar_t*>(aAttribNames[index])));
+
+ if (aNameSpaceID[index] > 0 &&
+ NS_SUCCEEDED(nameSpaceManager->GetNameSpaceURI(aNameSpaceID[index],
+ nameSpaceURI))) {
+ domElement->GetAttributeNS(nameSpaceURI, attributeName, attributeValue);
+ } else {
+ domElement->GetAttribute(attributeName, attributeValue);
+ }
+
+ aAttribValues[index] = ::SysAllocString(attributeValue.get());
+ }
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_computedStyle(
+ unsigned short aMaxStyleProperties, boolean aUseAlternateView,
+ BSTR __RPC_FAR* aStyleProperties, BSTR __RPC_FAR* aStyleValues,
+ unsigned short __RPC_FAR* aNumStyleProperties) {
+ if (!aStyleProperties || aStyleValues || !aNumStyleProperties)
+ return E_INVALIDARG;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ *aNumStyleProperties = 0;
+
+ if (mNode->IsDocument()) return S_FALSE;
+
+ nsCOMPtr<nsICSSDeclaration> cssDecl =
+ nsWinUtils::GetComputedStyleDeclaration(mNode->AsContent());
+ NS_ENSURE_TRUE(cssDecl, E_FAIL);
+
+ uint32_t length = cssDecl->Length();
+
+ uint32_t index = 0, realIndex = 0;
+ for (index = realIndex = 0; index < length && realIndex < aMaxStyleProperties;
+ index++) {
+ nsAutoCString property;
+ nsAutoCString value;
+
+ // Ignore -moz-* properties.
+ cssDecl->Item(index, property);
+ if (property.CharAt(0) != '-')
+ cssDecl->GetPropertyValue(property, value); // Get property value
+
+ if (!value.IsEmpty()) {
+ aStyleProperties[realIndex] =
+ ::SysAllocString(NS_ConvertUTF8toUTF16(property).get());
+ aStyleValues[realIndex] =
+ ::SysAllocString(NS_ConvertUTF8toUTF16(value).get());
+ ++realIndex;
+ }
+ }
+
+ *aNumStyleProperties = static_cast<unsigned short>(realIndex);
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_computedStyleForProperties(
+ unsigned short aNumStyleProperties, boolean aUseAlternateView,
+ BSTR __RPC_FAR* aStyleProperties, BSTR __RPC_FAR* aStyleValues) {
+ if (!aStyleProperties || !aStyleValues) return E_INVALIDARG;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ if (mNode->IsDocument()) return S_FALSE;
+
+ nsCOMPtr<nsICSSDeclaration> cssDecl =
+ nsWinUtils::GetComputedStyleDeclaration(mNode->AsContent());
+ NS_ENSURE_TRUE(cssDecl, E_FAIL);
+
+ uint32_t index = 0;
+ for (index = 0; index < aNumStyleProperties; index++) {
+ nsAutoCString value;
+ if (aStyleProperties[index])
+ cssDecl->GetPropertyValue(
+ NS_ConvertUTF16toUTF8(nsDependentString(aStyleProperties[index])),
+ value); // Get property value
+ aStyleValues[index] = ::SysAllocString(NS_ConvertUTF8toUTF16(value).get());
+ }
+
+ return S_OK;
+}
+
+// XXX Use MOZ_CAN_RUN_SCRIPT_BOUNDARY for now due to bug 1543294.
+MOZ_CAN_RUN_SCRIPT_BOUNDARY STDMETHODIMP
+sdnAccessible::scrollTo(boolean aScrollTopLeft) {
+ if (IsDefunct()) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ DocAccessible* document = GetDocument();
+ MOZ_ASSERT(document);
+ if (!mNode->IsContent()) return S_FALSE;
+
+ uint32_t scrollType = aScrollTopLeft
+ ? nsIAccessibleScrollType::SCROLL_TYPE_TOP_LEFT
+ : nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_RIGHT;
+
+ RefPtr<PresShell> presShell = document->PresShellPtr();
+ nsCOMPtr<nsIContent> content = mNode->AsContent();
+ nsCoreUtils::ScrollTo(presShell, content, scrollType);
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_parentNode(ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetParentNode();
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_firstChild(ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetFirstChild();
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_lastChild(ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetLastChild();
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_previousSibling(ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetPreviousSibling();
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_nextSibling(ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetNextSibling();
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_childAt(unsigned aChildIndex,
+ ISimpleDOMNode __RPC_FAR* __RPC_FAR* aNode) {
+ if (!aNode) return E_INVALIDARG;
+ *aNode = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsINode* resultNode = mNode->GetChildAt_Deprecated(aChildIndex);
+ if (resultNode) {
+ *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
+ (*aNode)->AddRef();
+ }
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_innerHTML(BSTR __RPC_FAR* aInnerHTML) {
+ if (!aInnerHTML) return E_INVALIDARG;
+ *aInnerHTML = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+ nsAutoString innerHTML;
+ if (!mNode) {
+ RemoteAccessible* remoteAcc = mMsaa->Acc()->AsRemote();
+ MOZ_ASSERT(remoteAcc);
+ if (!remoteAcc->mCachedFields) {
+ return S_FALSE;
+ }
+ remoteAcc->mCachedFields->GetAttribute(nsGkAtoms::html, innerHTML);
+ } else {
+ if (!mNode->IsElement()) {
+ return S_FALSE;
+ }
+ mNode->AsElement()->GetInnerHTML(innerHTML, IgnoreErrors());
+ }
+
+ if (innerHTML.IsEmpty()) return S_FALSE;
+
+ *aInnerHTML = ::SysAllocStringLen(innerHTML.get(), innerHTML.Length());
+ if (!*aInnerHTML) return E_OUTOFMEMORY;
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_localInterface(void __RPC_FAR* __RPC_FAR* aLocalInterface) {
+ if (!aLocalInterface) return E_INVALIDARG;
+ *aLocalInterface = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+ *aLocalInterface = this;
+ AddRef();
+
+ return S_OK;
+}
+
+STDMETHODIMP
+sdnAccessible::get_language(BSTR __RPC_FAR* aLanguage) {
+ if (!aLanguage) return E_INVALIDARG;
+ *aLanguage = nullptr;
+
+ if (IsDefunct()) return CO_E_OBJNOTCONNECTED;
+ if (!mNode) {
+ MOZ_ASSERT(mMsaa && mMsaa->Acc()->IsRemote());
+ return E_NOTIMPL;
+ }
+
+ nsAutoString language;
+ if (mNode->IsContent())
+ nsCoreUtils::GetLanguageFor(mNode->AsContent(), nullptr, language);
+ if (language.IsEmpty()) { // Nothing found, so use document's language
+ mNode->OwnerDoc()->GetHeaderData(nsGkAtoms::headerContentLanguage,
+ language);
+ }
+
+ if (language.IsEmpty()) return S_FALSE;
+
+ *aLanguage = ::SysAllocStringLen(language.get(), language.Length());
+ if (!*aLanguage) return E_OUTOFMEMORY;
+
+ return S_OK;
+}