reflow comments in core/paint

third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp

 /*
- * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
+ * reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
  *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
  *   Josh Soref <timeless@mac.com>
  *   Boris Zbarsky <bzbarsky@mit.edu>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  *
  * Alternatively, the contents of this file may be used under the terms
  * of either the Mozilla Public License Version 1.1, found at
  * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
  * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
  * (the "GPL"), in which case the provisions of the MPL or the GPL are
  * applicable instead of those above.  If you wish to allow use of your
  * version of this file only under the terms of one of those two
  * licenses (the MPL or the GPL) and not to allow others to use your
  * version of this file under the LGPL, indicate your decision by
  * deletingthe provisions above and replace them with the notice and
  * other provisions required by the MPL or the GPL, as the case may be.
  * If you do not delete the provisions above, a recipient may use your
  * version of this file under any of the LGPL, the MPL or the GPL.
  */
 
 #include "core/paint/PaintLayerClipper.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/svg/LayoutSVGRoot.h"
 #include "core/paint/PaintLayer.h"
 
 namespace blink {
 
 static void adjustClipRectsForChildren(const LayoutBoxModelObject& layoutObject,
                                        ClipRects& clipRects) {
   EPosition position = layoutObject.styleRef().position();
-  // A fixed object is essentially the root of its containing block hierarchy, so when
-  // we encounter such an object, we reset our clip rects to the fixedClipRect.
+  // A fixed object is essentially the root of its containing block hierarchy,
+  // so when we encounter such an object, we reset our clip rects to the
+  // fixedClipRect.
   if (position == FixedPosition) {
     clipRects.setPosClipRect(clipRects.fixedClipRect());
     clipRects.setOverflowClipRect(clipRects.fixedClipRect());
     clipRects.setFixed(true);
   } else if (position == RelativePosition) {
     clipRects.setPosClipRect(clipRects.overflowClipRect());
   } else if (position == AbsolutePosition) {
     clipRects.setOverflowClipRect(clipRects.posClipRect());
   }
 }
@@ skipping 169 matching lines @@
   // Update the clip rects that will be passed to child layers.
   if ((layoutObject.hasOverflowClip() ||
        layoutObject.styleRef().containsPaint()) &&
       shouldRespectOverflowClip(context)) {
     foregroundRect.intersect(
         toLayoutBox(layoutObject)
             .overflowClipRect(offset, context.overlayScrollbarClipBehavior));
     if (layoutObject.styleRef().hasBorderRadius())
       foregroundRect.setHasRadius(true);
 
-    // FIXME: Does not do the right thing with columns yet, since we don't yet factor in the
-    // individual column boxes as overflow.
+    // FIXME: Does not do the right thing with columns yet, since we don't yet
+    // factor in the individual column boxes as overflow.
 
-    // The LayoutView is special since its overflow clipping rect may be larger than its box rect (crbug.com/492871).
+    // The LayoutView is special since its overflow clipping rect may be larger
+    // than its box rect (crbug.com/492871).
     LayoutRect layerBoundsWithVisualOverflow =
         layoutObject.isLayoutView()
             ? toLayoutView(layoutObject).viewRect()
             : toLayoutBox(layoutObject).visualOverflowRect();
-    toLayoutBox(layoutObject)
-        .flipForWritingMode(
-            layerBoundsWithVisualOverflow);  // PaintLayer are in physical coordinates, so the overflow has to be flipped.
+    // PaintLayer are in physical coordinates, so the overflow has to be
+    // flipped.
+    toLayoutBox(layoutObject).flipForWritingMode(layerBoundsWithVisualOverflow);
     layerBoundsWithVisualOverflow.moveBy(offset);
     backgroundRect.intersect(layerBoundsWithVisualOverflow);
   }
 
-  // CSS clip (different than clipping due to overflow) can clip to any box, even if it falls outside of the border box.
+  // CSS clip (different than clipping due to overflow) can clip to any box,
+  // even if it falls outside of the border box.
   if (layoutObject.hasClip()) {
     // Clip applies to *us* as well, so go ahead and update the damageRect.
     LayoutRect newPosClip = toLayoutBox(layoutObject).clipRect(offset);
     backgroundRect.intersect(newPosClip);
     backgroundRect.setIsClippedByClipCss();
     foregroundRect.intersect(newPosClip);
     foregroundRect.setIsClippedByClipCss();
   }
 }
 
 void PaintLayerClipper::calculateClipRects(const ClipRectsContext& context,
                                            ClipRects& clipRects) const {
   const LayoutBoxModelObject& layoutObject = *m_layer.layoutObject();
   if (!m_layer.parent() &&
       !RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
     // The root layer's clip rect is always infinite.
     clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
     return;
   }
 
   bool isClippingRoot = &m_layer == context.rootLayer;
 
-  // For transformed layers, the root layer was shifted to be us, so there is no need to
-  // examine the parent. We want to cache clip rects with us as the root.
+  // For transformed layers, the root layer was shifted to be us, so there is no
+  // need to examine the parent. We want to cache clip rects with us as the
+  // root.
   PaintLayer* parentLayer = !isClippingRoot ? m_layer.parent() : nullptr;
-  // Ensure that our parent's clip has been calculated so that we can examine the values.
+  // Ensure that our parent's clip has been calculated so that we can examine
+  // the values.
   if (parentLayer) {
     parentLayer->clipper().getOrCalculateClipRects(context, clipRects);
   } else {
     clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
   }
 
   adjustClipRectsForChildren(layoutObject, clipRects);
 
   if ((layoutObject.hasOverflowClip() && shouldRespectOverflowClip(context)) ||
       (layoutObject.isSVGRoot() &&
        toLayoutSVGRoot(&layoutObject)->shouldApplyViewportClip()) ||
       layoutObject.hasClip() || layoutObject.styleRef().containsPaint()) {
-    // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
-    // some transformed layer boundary, for example, in the PaintLayerCompositor overlapMap, where
-    // clipRects are needed in view space.
+    // This offset cannot use convertToLayerCoords, because sometimes our
+    // rootLayer may be across some transformed layer boundary, for example, in
+    // the PaintLayerCompositor overlapMap, where clipRects are needed in view
+    // space.
     applyClipRects(context, layoutObject,
                    roundedLayoutPoint(layoutObject.localToAncestorPoint(
                        FloatPoint(), context.rootLayer->layoutObject())),
                    clipRects);
   }
 }
 
 static ClipRect backgroundClipRectForPosition(const ClipRects& parentRects,
                                               EPosition position) {
   if (position == FixedPosition)
@@ skipping 14 matching lines @@
   RefPtr<ClipRects> parentClipRects = ClipRects::create();
   if (&m_layer == context.rootLayer)
     parentClipRects->reset(LayoutRect(LayoutRect::infiniteIntRect()));
   else
     m_layer.parent()->clipper().getOrCalculateClipRects(context,
                                                         *parentClipRects);
 
   ClipRect result = backgroundClipRectForPosition(
       *parentClipRects, m_layer.layoutObject()->styleRef().position());
 
-  // Note: infinite clipRects should not be scrolled here, otherwise they will accidentally no longer be considered infinite.
+  // Note: infinite clipRects should not be scrolled here, otherwise they will
+  // accidentally no longer be considered infinite.
   if (parentClipRects->fixed() &&
       context.rootLayer->layoutObject() == layoutView &&
       result != LayoutRect(LayoutRect::infiniteIntRect()))
     result.move(toIntSize(layoutView->frameView()->scrollPosition()));
 
   return result;
 }
 
 void PaintLayerClipper::getOrCalculateClipRects(const ClipRectsContext& context,
                                                 ClipRects& clipRects) const {
@@ skipping 23 matching lines @@
     ShouldRespectOverflowClipType respectOverflowClip,
     const LayoutSize& subpixelAccumulation) const {
   ClipRectsContext context(rootLayer, PaintingClipRects,
                            IgnoreOverlayScrollbarSize, subpixelAccumulation);
   if (respectOverflowClip == IgnoreOverflowClip)
     context.setIgnoreOverflowClip();
   return getClipRects(context);
 }
 
 }  // namespace blink