Move rendering/RenderLayer* to layout/

Source/core/rendering/RenderLayerClipper.h

-/*
- * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
- * Copyright (C) 2013 Intel Corporation. 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
- *
- * 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.
- */
-
-#ifndef RenderLayerClipper_h
-#define RenderLayerClipper_h
-
-#include "core/rendering/ClipRectsCache.h"
-#include "core/rendering/RenderBox.h"
-
-namespace blink {
-
-class RenderLayer;
-
-enum ShouldRespectOverflowClip {
-    IgnoreOverflowClip,
-    RespectOverflowClip
-};
-
-class ClipRectsContext {
-public:
-    ClipRectsContext(const RenderLayer* root, ClipRectsCacheSlot slot, OverlayScrollbarSizeRelevancy relevancy = IgnoreOverlayScrollbarSize, const LayoutSize& accumulation = LayoutSize())
-        : rootLayer(root)
-        , scrollbarRelevancy(relevancy)
-        , cacheSlot(slot)
-        , subPixelAccumulation(accumulation)
-        , respectOverflowClip(slot == PaintingClipRectsIgnoringOverflowClip ? IgnoreOverflowClip : RespectOverflowClip)
-    {
-    }
-
-    void setIgnoreOverflowClip()
-    {
-        ASSERT(!usesCache() || cacheSlot == PaintingClipRects);
-        ASSERT(respectOverflowClip == RespectOverflowClip);
-        if (usesCache())
-            cacheSlot = PaintingClipRectsIgnoringOverflowClip;
-        respectOverflowClip = IgnoreOverflowClip;
-    }
-
-    bool usesCache() const
-    {
-        return cacheSlot != UncachedClipRects;
-    }
-
-    const RenderLayer* const rootLayer;
-    const OverlayScrollbarSizeRelevancy scrollbarRelevancy;
-
-private:
-    friend class RenderLayerClipper;
-
-    ClipRectsCacheSlot cacheSlot;
-    LayoutSize subPixelAccumulation;
-    ShouldRespectOverflowClip respectOverflowClip;
-};
-
-class RenderLayerClipper {
-    WTF_MAKE_NONCOPYABLE(RenderLayerClipper);
-public:
-    explicit RenderLayerClipper(RenderLayerModelObject&);
-
-    void clearClipRectsIncludingDescendants();
-    void clearClipRectsIncludingDescendants(ClipRectsCacheSlot);
-
-    LayoutRect childrenClipRect() const; // Returns the foreground clip rect of the layer in the document's coordinate space.
-    LayoutRect localClipRect() const; // Returns the background clip rect of the layer in the local coordinate space.
-
-    ClipRects* getClipRects(const ClipRectsContext&) const;
-
-    ClipRect backgroundClipRect(const ClipRectsContext&) const;
-
-    // This method figures out our layerBounds in coordinates relative to
-    // |rootLayer|. It also computes our background and foreground clip rects
-    // for painting/event handling.
-    // Pass offsetFromRoot if known.
-    void calculateRects(const ClipRectsContext&, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds,
-        ClipRect& backgroundRect, ClipRect& foregroundRect, ClipRect& outlineRect, const LayoutPoint* offsetFromRoot = 0) const;
-
-private:
-    void calculateClipRects(const ClipRectsContext&, ClipRects&) const;
-
-    ClipRects* clipRectsIfCached(const ClipRectsContext&) const;
-    ClipRects* storeClipRectsInCache(const ClipRectsContext&, ClipRects* parentClipRects, const ClipRects&) const;
-
-    // cachedClipRects looks buggy: It doesn't check whether context.rootLayer and entry.root match.
-    // FIXME: Move callers to clipRectsIfCached, which does the proper checks.
-    ClipRects* cachedClipRects(const ClipRectsContext& context) const
-    {
-        return m_cache ? m_cache->get(context.cacheSlot).clipRects.get() : 0;
-    }
-
-    void getOrCalculateClipRects(const ClipRectsContext&, ClipRects&) const;
-
-    RenderLayer* clippingRootForPainting() const;
-
-    ClipRectsCache& cache() const
-    {
-        if (!m_cache)
-            m_cache = adoptPtr(new ClipRectsCache);
-        return *m_cache;
-    }
-
-    // FIXME: Could this be a RenderBox?
-    RenderLayerModelObject& m_renderer;
-    mutable OwnPtr<ClipRectsCache> m_cache;
-};
-
-} // namespace blink
-
-#endif // RenderLayerClipper_h