Reland 8775059 Support IAccessibleHypertext.

content/browser/accessibility/browser_accessibility_win.cc

Index: content/browser/accessibility/browser_accessibility_win.cc
diff --git a/content/browser/accessibility/browser_accessibility_win.cc b/content/browser/accessibility/browser_accessibility_win.cc
index 4e88ac09fceff405867d870dfe52a7b36cb87fb9..092a948ecd96a1a27d9d3389952be464a472917e 100644
--- a/content/browser/accessibility/browser_accessibility_win.cc
+++ b/content/browser/accessibility/browser_accessibility_win.cc
@@ -27,6 +27,8 @@ const GUID GUID_ISimpleDOM = {
     0x0c539790, 0x12e4, 0x11cf,
     0xb6, 0x61, 0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8};
 
+const char16 BrowserAccessibilityWin::kEmbeddedCharacter[] = L"\xfffc";
+
 //
 // BrowserAccessibilityRelation
 //
@@ -1752,13 +1754,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_nCharacters(LONG* n_characters) {
   if (!n_characters)
     return E_INVALIDARG;
 
-  if (role_ == WebAccessibility::ROLE_TEXT_FIELD ||
-      role_ == WebAccessibility::ROLE_TEXTAREA) {
-    *n_characters = value_.length();
-  } else {
-    *n_characters = name_.length();
-  }
-
+  *n_characters = TextForIAccessibleText().length();
   return S_OK;
 }
 
@@ -2073,6 +2069,62 @@ STDMETHODIMP BrowserAccessibilityWin::setSelection(LONG selection_index,
 }
 
 //
+// IAccessibleHypertext methods.
+//
+
+STDMETHODIMP BrowserAccessibilityWin::get_nHyperlinks(long* hyperlink_count) {
+  if (!instance_active_)
+    return E_FAIL;
+
+  if (!hyperlink_count)
+    return E_INVALIDARG;
+
+  *hyperlink_count = hyperlink_offset_to_index_.size();
+  return S_OK;
+}
+
+STDMETHODIMP BrowserAccessibilityWin::get_hyperlink(
+    long index,
+    IAccessibleHyperlink** hyperlink) {
+  if (!instance_active_)
+    return E_FAIL;
+
+  if (!hyperlink ||
+      index < 0 ||
+      index >= static_cast<long>(hyperlinks_.size())) {
+    return E_INVALIDARG;
+  }
+
+  BrowserAccessibilityWin* child =
+      children_[hyperlinks_[index]]->toBrowserAccessibilityWin();
+  *hyperlink = static_cast<IAccessibleHyperlink*>(child->NewReference());
+  return S_OK;
+}
+
+STDMETHODIMP BrowserAccessibilityWin::get_hyperlinkIndex(
+    long char_index,
+    long* hyperlink_index) {
+  if (!instance_active_)
+    return E_FAIL;
+
+  if (!hyperlink_index)
+    return E_INVALIDARG;
+
+  *hyperlink_index = -1;
+
+  if (char_index < 0 || char_index >= static_cast<long>(hypertext_.size()))
+    return E_INVALIDARG;
+
+  std::map<int32, int32>::iterator it =
+      hyperlink_offset_to_index_.find(char_index);
+  if (it == hyperlink_offset_to_index_.end())
+    return E_FAIL;
+
+  *hyperlink_index = it->second;
+  return S_OK;
+}
+
+//
 // IAccessibleValue methods.
 //
 
@@ -2468,6 +2520,9 @@ STDMETHODIMP BrowserAccessibilityWin::QueryService(
 
   if (guidService == IID_IAccessible ||
       guidService == IID_IAccessible2 ||
+      guidService == IID_IAccessibleAction ||
+      guidService == IID_IAccessibleHyperlink ||
+      guidService == IID_IAccessibleHypertext ||
       guidService == IID_IAccessibleImage ||
       guidService == IID_IAccessibleTable ||
       guidService == IID_IAccessibleTable2 ||
@@ -2494,12 +2549,7 @@ HRESULT WINAPI BrowserAccessibilityWin::InternalQueryInterface(
     const _ATL_INTMAP_ENTRY* entries,
     REFIID iid,
     void** object) {
-  if (iid == IID_IAccessibleText) {
-    if (ia_role_ != ROLE_SYSTEM_LINK && ia_role_ != ROLE_SYSTEM_TEXT) {
-      *object = NULL;
-      return E_NOINTERFACE;
-    }
-  } else if (iid == IID_IAccessibleImage) {
+  if (iid == IID_IAccessibleImage) {
     if (ia_role_ != ROLE_SYSTEM_GRAPHIC) {
       *object = NULL;
       return E_NOINTERFACE;
@@ -2537,8 +2587,8 @@ HRESULT WINAPI BrowserAccessibilityWin::InternalQueryInterface(
 //
 
 // Initialize this object and mark it as active.
-void BrowserAccessibilityWin::Initialize() {
-  BrowserAccessibility::Initialize();
+void BrowserAccessibilityWin::PreInitialize() {
+  BrowserAccessibility::PreInitialize();
 
   InitRoleAndState();
 
@@ -2657,7 +2707,25 @@ void BrowserAccessibilityWin::Initialize() {
   }
 }
 
-void BrowserAccessibilityWin::SendNodeUpdateEvents() {
+void BrowserAccessibilityWin::PostInitialize() {
+  BrowserAccessibility::PostInitialize();
+
+  // Construct the hypertext for this node.
+  hyperlink_offset_to_index_.clear();
+  hyperlinks_.clear();
+  hypertext_.clear();
+  for (unsigned int i = 0; i < children().size(); ++i) {
+    BrowserAccessibility* child = children()[i];
+    if (child->role() == WebAccessibility::ROLE_STATIC_TEXT) {
+      hypertext_ += child->name();
+    } else {
+      hyperlink_offset_to_index_[hypertext_.size()] = hyperlinks_.size();
+      hypertext_ += kEmbeddedCharacter;
+      hyperlinks_.push_back(i);
+    }
+  }
+  DCHECK_EQ(hyperlink_offset_to_index_.size(), hyperlinks_.size());
+
   // Fire an event when an alert first appears.
   if (role_ == WebAccessibility::ROLE_ALERT && first_time_)
     manager_->NotifyAccessibilityEvent(ViewHostMsg_AccEvent::ALERT, this);
@@ -2788,8 +2856,10 @@ string16 BrowserAccessibilityWin::Escape(const string16& str) {
 const string16& BrowserAccessibilityWin::TextForIAccessibleText() {
   if (IsEditableText()) {
     return value_;
-  } else {
+  } else if (role_ == WebAccessibility::ROLE_STATIC_TEXT) {
     return name_;
+  } else {
+    return hypertext_;
   }
 }