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Diffstat (limited to '')
| -rw-r--r-- | accessible/windows/sdn/sdnAccessible.cpp | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/accessible/windows/sdn/sdnAccessible.cpp b/accessible/windows/sdn/sdnAccessible.cpp new file mode 100644 index 0000000000..04643e229a --- /dev/null +++ b/accessible/windows/sdn/sdnAccessible.cpp @@ -0,0 +1,440 @@ +/* -*- 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()) { + AccessibleWrap::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; + } + + AccessibleWrap* accessible = GetAccessible(); + 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; + + 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; + + // 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. + AccessibleWrap* accessible = GetAccessible(); + if (accessible) { + *aUniqueID = AccessibleWrap::GetChildIDFor(accessible); + } else { + if (mUniqueId.isNothing()) { + AccessibleWrap::AssignChildIDTo(WrapNotNull(this)); + } + MOZ_ASSERT(mUniqueId.isSome()); + *aUniqueID = mUniqueId.value(); + } + + *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->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->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; + + *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->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) { + DocAccessible* document = GetDocument(); + if (!document) // that's IsDefunct check + return CO_E_OBJNOTCONNECTED; + + 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; + + 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; + + 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; + + 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; + + 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; + + 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; + + 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; + + if (!mNode->IsElement()) return S_FALSE; + + nsAutoString innerHTML; + 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; + + 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; +} |