Expose InlineTextBoxes in the accessibility tree.

Source/core/accessibility/AXObjectCache.cpp

Index: Source/core/accessibility/AXObjectCache.cpp
diff --git a/Source/core/accessibility/AXObjectCache.cpp b/Source/core/accessibility/AXObjectCache.cpp
index 526c600c82591639c3b47ebf48f580a8d011918f..305b7748f78dfd3b784ee5fd2167350296ca3f81 100644
--- a/Source/core/accessibility/AXObjectCache.cpp
+++ b/Source/core/accessibility/AXObjectCache.cpp
@@ -37,6 +37,7 @@
 #include "core/accessibility/AccessibilityARIAGridCell.h"
 #include "core/accessibility/AccessibilityARIAGridRow.h"
 #include "core/accessibility/AccessibilityImageMapLink.h"
+#include "core/accessibility/AccessibilityInlineTextBox.h"
 #include "core/accessibility/AccessibilityList.h"
 #include "core/accessibility/AccessibilityListBox.h"
 #include "core/accessibility/AccessibilityListBoxOption.h"
@@ -100,6 +101,7 @@ void AXComputedObjectAttributeCache::setIgnored(AXID id, AccessibilityObjectIncl
 }
 
 bool AXObjectCache::gAccessibilityEnabled = false;
+bool AXObjectCache::gInlineTextBoxAccessibility = false;
 
 AXObjectCache::AXObjectCache(const Document* doc)
     : m_notificationPostTimer(this, &AXObjectCache::notificationPostTimerFired)
@@ -233,6 +235,19 @@ AccessibilityObject* AXObjectCache::get(Node* node)
     return m_objects.get(nodeID);
 }
 
+AccessibilityObject* AXObjectCache::get(InlineTextBox* inlineTextBox)
+{
+    if (!inlineTextBox)
+        return 0;
+
+    AXID axID = m_inlineTextBoxObjectMapping.get(inlineTextBox);
+    ASSERT(!HashTraits<AXID>::isDeletedValue(axID));
+    if (!axID)
+        return 0;
+
+    return m_objects.get(axID);
+}
+
 // FIXME: This probably belongs on Node.
 // FIXME: This should take a const char*, but one caller passes nullAtom.
 bool nodeHasRole(Node* node, const String& role)
@@ -301,6 +316,11 @@ static PassRefPtr<AccessibilityObject> createFromNode(Node* node)
     return AccessibilityNodeObject::create(node);
 }
 
+static PassRefPtr<AccessibilityObject> createFromInlineTextBox(InlineTextBox* inlineTextBox)
+{
+    return AccessibilityInlineTextBox::create(inlineTextBox);
+}
+
 AccessibilityObject* AXObjectCache::getOrCreate(Widget* widget)
 {
     if (!widget)
@@ -388,6 +408,30 @@ AccessibilityObject* AXObjectCache::getOrCreate(RenderObject* renderer)
     return newObj.get();
 }
 
+AccessibilityObject* AXObjectCache::getOrCreate(InlineTextBox* inlineTextBox)
+{
+    if (!inlineTextBox)
+        return 0;
+
+    if (AccessibilityObject* obj = get(inlineTextBox))
+        return obj;
+
+    RefPtr<AccessibilityObject> newObj = createFromInlineTextBox(inlineTextBox);
+
+    // Will crash later if we have two objects for the same inlineTextBox.
+    ASSERT(!get(inlineTextBox));
+
+    getAXID(newObj.get());
+
+    m_inlineTextBoxObjectMapping.set(inlineTextBox, newObj->axObjectID());
+    m_objects.set(newObj->axObjectID(), newObj);
+    newObj->init();
+    attachWrapper(newObj.get());
+    newObj->setLastKnownIsIgnoredValue(newObj->accessibilityIsIgnored());
+
+    return newObj.get();
+}
+
 AccessibilityObject* AXObjectCache::rootObject()
 {
     if (!gAccessibilityEnabled)
@@ -503,6 +547,15 @@ void AXObjectCache::remove(Widget* view)
     m_widgetObjectMapping.remove(view);
 }
 
+void AXObjectCache::remove(InlineTextBox* inlineTextBox)
+{
+    if (!inlineTextBox)
+        return;
+
+    AXID axID = m_inlineTextBoxObjectMapping.get(inlineTextBox);
+    remove(axID);
+    m_inlineTextBoxObjectMapping.remove(inlineTextBox);
+}
 
 AXID AXObjectCache::platformGenerateAXID() const
 {