Add basic support for accessibility hit testing within web contents....

webkit/glue/webaccessibility.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/glue/webaccessibility.h"
 
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAccessibilityCache.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAccessibilityObject.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAccessibilityRole.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAttribute.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDocumentType.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebElement.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFormControlElement.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebInputElement.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebNamedNodeMap.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebNode.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebSize.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebString.h"
 
 using WebKit::WebAccessibilityCache;
 using WebKit::WebAccessibilityRole;
 using WebKit::WebAccessibilityObject;
 
 namespace webkit_glue {
 
 // Provides a conversion between the WebKit::WebAccessibilityRole and a role
 // supported on the Browser side. Listed alphabetically by the
@@ skipping 327 matching lines @@
     attributes[ATTR_DOC_TITLE] = document.title();
     attributes[ATTR_DOC_URL] = document.frame()->url().spec().utf16();
     if (document.isXHTMLDocument())
       attributes[ATTR_DOC_MIMETYPE] = WebKit::WebString("text/xhtml");
     else
       attributes[ATTR_DOC_MIMETYPE] = WebKit::WebString("text/html");
 
     const WebKit::WebDocumentType& doctype = document.doctype();
     if (!doctype.isNull())
       attributes[ATTR_DOC_DOCTYPE] = doctype.name();
+
+    const gfx::Size& scroll_offset = document.frame()->scrollOffset();
+    attributes[ATTR_DOC_SCROLLX] = base::IntToString16(scroll_offset.width());
+    attributes[ATTR_DOC_SCROLLY] = base::IntToString16(scroll_offset.height());
   }
 
   // Add the source object to the cache and store its id.
   id = cache->addOrGetId(src);
 
   // Recursively create children.
   int child_count = src.childCount();
   for (int i = 0; i < child_count; i++) {
     WebAccessibilityObject child = src.childAt(i);
 
     // The child may be invalid due to issues in webkit accessibility code.
     // Don't add children are invalid thus preventing a crash.
     // https://bugs.webkit.org/show_bug.cgi?id=44149
     // TODO(ctguil): We may want to remove this check as webkit stabilizes.
     if (child.isValid())
       children.push_back(WebAccessibility(child, cache));
   }
 }
 
 }  // namespace webkit_glue