Expose scroll containers via accessibility APIs.

public/web/WebAXObject.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebAXObject_h
 #define WebAXObject_h
 
 #include "../platform/WebCommon.h"
+#include "../platform/WebPoint.h"
 #include "../platform/WebPrivatePtr.h"
 #include "../platform/WebVector.h"
 #include "WebAXEnums.h"
 
 #if BLINK_IMPLEMENTATION
 namespace WTF { template <typename T> class PassRefPtr; }
 #endif
 
 namespace blink {
 
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     // Walk the WebAXObjects on the same line. This is supported on any
     // object type but primarily intended to be used for inline text boxes.
     BLINK_EXPORT WebAXObject nextOnLine() const;
     BLINK_EXPORT WebAXObject previousOnLine() const;
 
     // For an inline text box.
     BLINK_EXPORT void characterOffsets(WebVector<int>&) const;
     BLINK_EXPORT void wordBoundaries(WebVector<int>& starts, WebVector<int>& ends) const;
 
+    // Scrollable containers.
+    BLINK_EXPORT bool isScrollableContainer() const;
+    BLINK_EXPORT WebPoint scrollOffset() const;
+    BLINK_EXPORT WebPoint minimumScrollOffset() const;
+    BLINK_EXPORT WebPoint maximumScrollOffset() const;
+    BLINK_EXPORT void setScrollOffset(const WebPoint&) const;
+
     // Make this object visible by scrolling as many nested scrollable views as needed.
     BLINK_EXPORT void scrollToMakeVisible() const;
     // Same, but if the whole object can't be made visible, try for this subrect, in local coordinates.
     BLINK_EXPORT void scrollToMakeVisibleWithSubFocus(const WebRect&) const;
     // Scroll this object to a given point in global coordinates of the top-level window.
     BLINK_EXPORT void scrollToGlobalPoint(const WebPoint&) const;
 
 #if BLINK_IMPLEMENTATION
     WebAXObject(const WTF::PassRefPtr<AXObject>&);
     WebAXObject& operator=(const WTF::PassRefPtr<AXObject>&);
     operator WTF::PassRefPtr<AXObject>() const;
 #endif
 
 private:
     WebPrivatePtr<AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif