Include clip-path and border radius when hit testing boxes

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 36 matching lines @@
 #include "core/layout/LayoutListBox.h"
 #include "core/layout/LayoutListMarker.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
 #include "core/layout/LayoutPart.h"
 #include "core/layout/LayoutReplica.h"
 #include "core/layout/LayoutScrollbarPart.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/PaintLayerCompositor.h"
 #include "core/layout/shapes/ShapeOutsideInfo.h"
+#include "core/layout/svg/LayoutSVGResourceClipper.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/Page.h"
 #include "core/paint/BackgroundImageGeometry.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/PaintLayer.h"
 #include "core/style/ShadowList.h"
 #include "platform/LengthFunctions.h"
 #include "platform/geometry/DoubleRect.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/FloatRoundedRect.h"
@@ skipping 1091 matching lines @@
 }
 
 // Hit Testing
 bool LayoutBox::nodeAtPoint(HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
 {
     LayoutPoint adjustedLocation = accumulatedOffset + location();
 
     // Exit early if no children can be hit.
     LayoutRect overflowRect = visualOverflowRect();
     overflowRect.moveBy(adjustedLocation);
-    if (!locationInContainer.intersects(overflowRect)) {
+    if (!locationInContainer.intersects(overflowRect))
         return false;
-    }
+
+    if (hitTestClippedOutByClipPath(locationInContainer, adjustedLocation))
+        return false;
 
     // Check kids first.
     for (LayoutObject* child = slowLastChild(); child; child = child->previousSibling()) {
         if ((!child->hasLayer() || !toLayoutBoxModelObject(child)->layer()->isSelfPaintingLayer()) && child->nodeAtPoint(result, locationInContainer, adjustedLocation, action)) {
             updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
             return true;
         }
     }
 
+    if (hitTestClippedOutByRoundedBorder(locationInContainer, adjustedLocation))
+        return false;
+
     // Check our bounds next. For this purpose always assume that we can only be hit in the
     // foreground phase (which is true for replaced elements like images).
     LayoutRect boundsRect = borderBoxRect();
     boundsRect.moveBy(adjustedLocation);
     if (visibleToHitTestRequest(result.hitTestRequest()) && action == HitTestForeground && locationInContainer.intersects(boundsRect)) {
         updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
         if (!result.addNodeToListBasedTestResult(node(), locationInContainer, boundsRect))
             return true;
     }
 
     return false;
 }
 
+bool LayoutBox::hitTestClippedOutByClipPath(const HitTestLocation& locationInContainer, const LayoutPoint& borderBoxLocation) const
+{
+    if (!style()->clipPath())
+        return false;
+
+    if (style()->clipPath()->type() == ClipPathOperation::SHAPE) {
+        ShapeClipPathOperation* clipPath = toShapeClipPathOperation(style()->clipPath());
+        // FIXME: handle marginBox etc.
+        if (!clipPath->path(FloatRect(borderBoxRect())).contains(FloatPoint(locationInContainer.point() - borderBoxLocation), clipPath->windRule()))
+            return true;
+    } else {
+        ASSERT(style()->clipPath()->type() == ClipPathOperation::REFERENCE);
+        ReferenceClipPathOperation* referenceClipPathOperation = toReferenceClipPathOperation(style()->clipPath());
+        Element* element = document().getElementById(referenceClipPathOperation->fragment());
+        if (isSVGClipPathElement(element) && element->layoutObject()) {
+            LayoutSVGResourceClipper* clipper = toLayoutSVGResourceClipper(toLayoutSVGResourceContainer(element->layoutObject()));
+            if (!clipper->hitTestClipContent(FloatRect(borderBoxRect()), FloatPoint(locationInContainer.point() - borderBoxLocation)))
+                return true;
+        }
+    }
+
+    return false;
+}
+
+bool LayoutBox::hitTestClippedOutByRoundedBorder(const HitTestLocation& locationInContainer, const LayoutPoint& borderBoxLocation) const
+{
+    if (!style()->hasBorderRadius())
+        return false;
+
+    LayoutRect borderRect = borderBoxRect();
+    borderRect.moveBy(borderBoxLocation);
+    return !locationInContainer.intersects(style()->getRoundedBorderFor(borderRect));
+}
+
 void LayoutBox::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
 {
     BoxPainter(*this).paint(paintInfo, paintOffset);
 }
 
 
 void LayoutBox::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
 {
     BoxPainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset);
 }
@@ skipping 3654 matching lines @@
 }
 
 void LayoutBox::clearPreviousPaintInvalidationRects()
 {
     LayoutBoxModelObject::clearPreviousPaintInvalidationRects();
     if (PaintLayerScrollableArea* scrollableArea = this->scrollableArea())
         scrollableArea->clearPreviousPaintInvalidationRects();
 }
 
 } // namespace blink