Allow zoom-in to a target rect when tapping multiple targets.

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 112 matching lines @@
 
 class WebViewImpl : public WebView
     , public RefCounted<WebViewImpl>
     , public WebGestureCurveTarget
     , public WebCore::PagePopupDriver
     , public PageWidgetEventHandler {
 public:
     enum AutoZoomType {
         DoubleTap,
         FindInPage,
+        MultipleTargets,
     };
 
     // WebWidget methods:
     virtual void close();
     virtual WebSize size();
     virtual void willStartLiveResize();
     virtual void resize(const WebSize&);
     virtual void willEndLiveResize();
     virtual void willEnterFullScreen();
     virtual void didEnterFullScreen();
@@ skipping 73 matching lines @@
     virtual void clearFocusedNode();
     virtual void scrollFocusedNodeIntoView();
     virtual void scrollFocusedNodeIntoRect(const WebRect&);
     virtual void zoomToFindInPageRect(const WebRect&);
     virtual void advanceFocus(bool reverse);
     virtual double zoomLevel();
     virtual double setZoomLevel(bool textOnly, double zoomLevel);
     virtual void zoomLimitsChanged(double minimumZoomLevel,
                                    double maximumZoomLevel);
     virtual void setInitialPageScaleOverride(float);
+    virtual bool zoomToMultipleTargetsRect(const WebRect&);
     virtual float pageScaleFactor() const;
     virtual void setPageScaleFactorPreservingScrollOffset(float);
     virtual void setPageScaleFactor(float scaleFactor, const WebPoint& origin);
     virtual void setPageScaleFactorLimits(float minPageScale, float maxPageScale);
     virtual float minimumPageScaleFactor() const;
     virtual float maximumPageScaleFactor() const;
     virtual void saveScrollAndScaleState();
     virtual void restoreScrollAndScaleState();
     virtual void resetScrollAndScaleState();
     virtual void setIgnoreViewportTagScaleLimits(bool);
@@ skipping 285 matching lines @@
     // Called by a full frame plugin inside this view to inform it that its
     // zoom level has been updated.  The plugin should only call this function
     // if the zoom change was triggered by the browser, it's only needed in case
     // a plugin can update its own zoom, say because of its own UI.
     void fullFramePluginZoomLevelChanged(double zoomLevel);
 
     void computeScaleAndScrollForHitRect(const WebRect& hitRect, AutoZoomType, float& scale, WebPoint& scroll, bool& isAnchor);
     WebCore::Node* bestTapNode(const WebCore::PlatformGestureEvent& tapEvent);
     void enableTapHighlight(const WebCore::PlatformGestureEvent& tapEvent);
     void computeScaleAndScrollForFocusedNode(WebCore::Node* focusedNode, float& scale, WebCore::IntPoint& scroll, bool& needAnimation);
-    void animateZoomAroundPoint(const WebCore::IntPoint&, AutoZoomType);
+
+    // The rect has different meanings depending on zoom type:
+    // - DoubleTap
+    //     Point where a double tap occured, will zoom to fit an element.
+    // - FindInPage
+    //     Enclosing rect of the element we would like to zoom to.
+    // - MultipleTargets
+    //     Window we would like to zoom into.
+    bool animateZoomToRect(const WebCore::IntRect&, AutoZoomType);
 
     void enableFakeDoubleTapAnimationForTesting(bool);
     bool fakeDoubleTapAnimationPendingForTesting() const { return m_doubleTapZoomPending; }
     WebCore::IntPoint fakeDoubleTapTargetPositionForTesting() const { return m_fakeDoubleTapTargetPosition; }
     float fakeDoubleTapPageScaleFactorForTesting() const { return m_fakeDoubleTapPageScaleFactor; }
     bool fakeDoubleTapUseAnchorForTesting() const { return m_fakeDoubleTapUseAnchor; }
 
     void enterFullScreenForElement(WebCore::Element*);
     void exitFullScreenForElement(WebCore::Element*);
 
@@ skipping 290 matching lines @@
     bool m_showFPSCounter;
     bool m_showPaintRects;
     bool m_showDebugBorders;
     bool m_continuousPaintingEnabled;
     bool m_showScrollBottleneckRects;
 };
 
 } // namespace WebKit
 
 #endif