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

   1 /*
   2  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
   3  *
   4  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
   5  *
   6  * Other contributors:
   7  *   Robert O'Callahan <roc+@cs.cmu.edu>
   8  *   David Baron <dbaron@fas.harvard.edu>
   9  *   Christian Biesinger <cbiesinger@web.de>
  10  *   Randall Jesup <rjesup@wgate.com>
  11  *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
  12  *   Josh Soref <timeless@mac.com>
  13  *   Boris Zbarsky <bzbarsky@mit.edu>
  14  *
  15  * This library is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU Lesser General Public
  17  * License as published by the Free Software Foundation; either
  18  * version 2.1 of the License, or (at your option) any later version.
  19  *
  20  * This library is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * Lesser General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU Lesser General Public
  26  * License along with this library; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  28  *
  29  * Alternatively, the contents of this file may be used under the terms
  30  * of either the Mozilla Public License Version 1.1, found at
  31  * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
  32  * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
  33  * (the "GPL"), in which case the provisions of the MPL or the GPL are
  34  * applicable instead of those above.  If you wish to allow use of your
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  37  * version of this file under the LGPL, indicate your decision by
  38  * deletingthe provisions above and replace them with the notice and
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  40  * If you do not delete the provisions above, a recipient may use your
  41  * version of this file under any of the LGPL, the MPL or the GPL.
  42  */
  43
  44 #include "config.h"
  45 #include "core/paint/DeprecatedPaintLayerReflectionInfo.h"
  46
  47 #include "core/frame/UseCounter.h"
  48 #include "core/layout/LayoutReplica.h"
  49 #include "core/style/ComputedStyle.h"
  50 #include "core/paint/DeprecatedPaintLayer.h"
  51 #include "core/paint/DeprecatedPaintLayerPainter.h"
  52 #include "platform/transforms/ScaleTransformOperation.h"
  53 #include "platform/transforms/TranslateTransformOperation.h"
  54
  55 #include "wtf/RefPtr.h"
  56
  57 namespace blink {
  58
  59 DeprecatedPaintLayerReflectionInfo::DeprecatedPaintLayerReflectionInfo(LayoutBox& layoutObject)
  60     : m_box(&layoutObject)
  61     , m_isPaintingInsideReflection(false)
  62 {
  63     UseCounter::count(box().document(), UseCounter::Reflection);
  64
  65     m_reflection = LayoutReplica::createAnonymous(&box().document());
  66     m_reflection->setDangerousOneWayParent(m_box);
  67 }
  68
  69 void DeprecatedPaintLayerReflectionInfo::destroy()
  70 {
  71     if (!m_reflection->documentBeingDestroyed())
  72         m_reflection->removeLayers(box().layer());
  73
  74     m_reflection->setDangerousOneWayParent(nullptr);
  75     m_reflection->destroy();
  76     m_reflection = nullptr;
  77 }
  78
  79 DeprecatedPaintLayer* DeprecatedPaintLayerReflectionInfo::reflectionLayer() const
  80 {
  81     return m_reflection->layer();
  82 }
  83
  84 void DeprecatedPaintLayerReflectionInfo::updateAfterStyleChange(const ComputedStyle* oldStyle)
  85 {
  86     RefPtr<ComputedStyle> newStyle = ComputedStyle::create();
  87     newStyle->inheritFrom(box().styleRef());
  88
  89     // Map in our transform.
  90     TransformOperations transform;
  91     switch (box().style()->boxReflect()->direction()) {
  92     case ReflectionBelow:
  93         transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed),
  94             Length(100., Percent), TransformOperation::Translate));
  95         transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed),
  96             box().style()->boxReflect()->offset(), TransformOperation::Translate));
  97         transform.operations().append(ScaleTransformOperation::create(1.0, -1.0, ScaleTransformOperation::Scale));
  98         break;
  99
 100     case ReflectionAbove:
 101         transform.operations().append(ScaleTransformOperation::create(1.0, -1.0, ScaleTransformOperation::Scale));
 102         transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed),
 103             Length(100., Percent), TransformOperation::Translate));
 104         transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed),
 105             box().style()->boxReflect()->offset(), TransformOperation::Translate));
 106         break;
 107
 108     case ReflectionRight:
 109         transform.operations().append(TranslateTransformOperation::create(Length(100., Percent),
 110             Length(0, Fixed), TransformOperation::Translate));
 111         transform.operations().append(TranslateTransformOperation::create(
 112             box().style()->boxReflect()->offset(), Length(0, Fixed), TransformOperation::Translate));
 113         transform.operations().append(ScaleTransformOperation::create(-1.0, 1.0, ScaleTransformOperation::Scale));
 114         break;
 115
 116     case ReflectionLeft:
 117         transform.operations().append(ScaleTransformOperation::create(-1.0, 1.0, ScaleTransformOperation::Scale));
 118         transform.operations().append(TranslateTransformOperation::create(Length(100., Percent),
 119             Length(0, Fixed), TransformOperation::Translate));
 120         transform.operations().append(TranslateTransformOperation::create(
 121             box().style()->boxReflect()->offset(), Length(0, Fixed), TransformOperation::Translate));
 122         break;
 123     }
 124     newStyle->setTransform(transform);
 125
 126     // Map in our mask.
 127     newStyle->setMaskBoxImage(box().style()->boxReflect()->mask());
 128
 129     m_reflection->setStyle(newStyle.release());
 130 }
 131
 132 void DeprecatedPaintLayerReflectionInfo::paint(GraphicsContext* context, const DeprecatedPaintLayerPaintingInfo& paintingInfo, PaintLayerFlags flags)
 133 {
 134     if (m_isPaintingInsideReflection)
 135         return;
 136
 137     // Mark that we are now inside replica painting.
 138     m_isPaintingInsideReflection = true;
 139     DeprecatedPaintLayerPainter(*reflectionLayer()).paintLayer(context, paintingInfo, flags);
 140     m_isPaintingInsideReflection = false;
 141 }
 142
 143 } // namespace blink