1 files changed, 522 insertions, 0 deletions
diff --git a/accessible/windows/sdn/sdnAccessible.cpp b/accessible/windows/sdn/sdnAccessible.cpp
new file mode 100644
index 0000000000..780bea3758
--- /dev/null
+++ b/accessible/windows/sdn/sdnAccessible.cpp
@@ -0,0 +1,522 @@
+/* -*- 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(CacheKey::InnerHTML, 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;
+}