third_party/WebKit/Source/core/layout/LayoutGeometryMapStep.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  * Copyright (C) 2014 Google Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifndef LayoutGeometryMapStep_h
  28 #define LayoutGeometryMapStep_h
  29
  30 #include "platform/geometry/LayoutSize.h"
  31 #include "platform/transforms/TransformationMatrix.h"
  32 #include "wtf/Allocator.h"
  33 #include "wtf/OwnPtr.h"
  34
  35 namespace blink {
  36
  37 class LayoutObject;
  38
  39 // Stores data about how to map from one layoutObject to its container.
  40 struct LayoutGeometryMapStep {
  41     ALLOW_ONLY_INLINE_ALLOCATION();
  42     LayoutGeometryMapStep(const LayoutGeometryMapStep& o)
  43         : m_layoutObject(o.m_layoutObject)
  44         , m_offset(o.m_offset)
  45         , m_offsetForFixedPosition(o.m_offsetForFixedPosition)
  46         , m_accumulatingTransform(o.m_accumulatingTransform)
  47         , m_isNonUniform(o.m_isNonUniform)
  48         , m_isFixedPosition(o.m_isFixedPosition)
  49         , m_hasTransform(o.m_hasTransform)
  50     {
  51         ASSERT(!o.m_transform);
  52     }
  53     LayoutGeometryMapStep(const LayoutObject* layoutObject, bool accumulatingTransform, bool isNonUniform, bool isFixedPosition, bool hasTransform)
  54         : m_layoutObject(layoutObject)
  55         , m_accumulatingTransform(accumulatingTransform)
  56         , m_isNonUniform(isNonUniform)
  57         , m_isFixedPosition(isFixedPosition)
  58         , m_hasTransform(hasTransform)
  59     {
  60     }
  61     const LayoutObject* m_layoutObject;
  62     LayoutSize m_offset;
  63     OwnPtr<TransformationMatrix> m_transform; // Includes offset if non-null.
  64     LayoutSize m_offsetForFixedPosition;
  65     bool m_accumulatingTransform;
  66     bool m_isNonUniform; // Mapping depends on the input point, e.g. because of CSS columns.
  67     bool m_isFixedPosition;
  68     bool m_hasTransform;
  69 };
  70
  71 } // namespace blink
  72
  73 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::LayoutGeometryMapStep);
  74
  75 #endif // LayoutGeometryMapStep_h