Implement sequential focus navigation for OOPIF.

third_party/WebKit/public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 2011, 2012 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 15 matching lines @@
  * 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 WebView_h
 #define WebView_h
 
 #include "../platform/WebColor.h"
 #include "../platform/WebDisplayMode.h"
+#include "../platform/WebFocusType.h"
 #include "../platform/WebPageVisibilityState.h"
 #include "../platform/WebString.h"
 #include "../platform/WebVector.h"
 #include "WebDragOperation.h"
 #include "WebHistoryCommitType.h"
 #include "WebHistoryItem.h"
 #include "WebWidget.h"
 
 namespace blink {
 
 class WebAXObject;
 class WebAutofillClient;
 class WebCompositedDisplayList;
 class WebCredentialManagerClient;
 class WebDragData;
 class WebFrame;
 class WebHitTestResult;
+class WebLocalFrame;
 class WebPageImportanceSignals;
 class WebPageOverlay;
 class WebPrerendererClient;
+class WebRemoteFrame;
 class WebSettings;
 class WebSpellCheckClient;
 class WebString;
 class WebViewClient;
 struct WebActiveWheelFlingParameters;
 struct WebDeviceEmulationParams;
 struct WebFloatPoint;
 struct WebMediaPlayerAction;
 struct WebPluginAction;
 struct WebPoint;
@@ skipping 118 matching lines @@
     // viewport space. Returns true if an animation was started.
     virtual bool scrollFocusedNodeIntoRect(const WebRect&) { return false; }
 
     // Smooth scroll the root layer to |targetX|, |targetY| in |durationMs|.
     virtual void smoothScroll(int targetX, int targetY, long durationMs) { }
 
     // Advance the focus of the WebView forward to the next element or to the
     // previous element in the tab sequence (if reverse is true).
     virtual void advanceFocus(bool reverse) { }
 
+    // Advance the focus from the frame |from| to the next (or previous,

[dcheng, 2015/12/04 23:11:01]

"next in sequence (determined by WebFocusType)"

[alexmos, 2015/12/05 00:07:45]

Done.

+    // depending on the provided WebFocusType) focusable element in frame |to|.
+    // Used when focus needs to advance to/from a cross-process frame.
+    virtual void advanceFocusAcrossFrames(WebFocusType, WebRemoteFrame* from, WebLocalFrame* to) { }
+
     // Animate a scale into the specified rect where multiple targets were
     // found from previous tap gesture.
     // Returns false if it doesn't do any zooming.
     virtual bool zoomToMultipleTargetsRect(const WebRect&) = 0;
 
 
     // Zoom ----------------------------------------------------------------
 
     // Returns the current zoom level.  0 is "original size", and each increment
     // above or below represents zooming 20% larger or smaller to default limits
@@ skipping 273 matching lines @@
     // context's ability to deal with that failure gracefully can be tested.
     virtual void forceNextDrawingBufferCreationToFail() = 0;
 
 protected:
     ~WebView() {}
 };
 
 } // namespace blink
 
 #endif