Implement 'sequential focus navigation starting point.'

third_party/WebKit/Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 414 matching lines @@
     }
 
     // We don't do this at the start of mouse down handling,
     // because we don't want to do it until we know we didn't hit a widget.
     if (singleClick)
         focusDocumentView();
 
     Node* innerNode = event.innerNode();
 
     m_mousePressNode = innerNode;
+    m_frame->document()->setSequentialFocusNavigationStartingPoint(innerNode);
     m_dragStartPos = event.event().position();
 
     bool swallowEvent = false;
     m_mousePressed = true;
 
     if (event.event().clickCount() == 2)
         swallowEvent = selectionController().handleMousePressEventDoubleClick(event);
     else if (event.event().clickCount() >= 3)
         swallowEvent = selectionController().handleMousePressEventTripleClick(event);
     else
@@ skipping 527 matching lines @@
     // when we dispatch the event.
     LayoutPoint documentPoint = contentPointFromRootFrame(m_frame, mouseEvent.position());
     MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
 
     if (!mev.innerNode()) {
         invalidateClick();
         return WebInputEventResult::NotHandled;
     }
 
     m_mousePressNode = mev.innerNode();
+    m_frame->document()->setSequentialFocusNavigationStartingPoint(mev.innerNode());
 
     RefPtrWillBeRawPtr<LocalFrame> subframe = subframeForHitTestResult(mev);
     if (subframe) {
         WebInputEventResult result = passMousePressEventToSubframe(mev, subframe.get());
         // Start capturing future events for this frame.  We only do this if we didn't clear
         // the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop.
         // The capturing should be done only when the result indicates it
         // has been handled. See crbug.com/269917
         m_capturesDragging = subframe->eventHandler().capturesDragging();
         if (m_mousePressed && m_capturesDragging) {
@@ skipping 2982 matching lines @@
 PlatformEvent::Modifiers EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return static_cast<PlatformEvent::Modifiers>(PlatformEvent::CtrlKey | PlatformEvent::AltKey);
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink