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

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/layout/SubtreeLayoutScope.h"
  33
  34 #include "core/frame/FrameView.h"
  35 #include "core/layout/LayoutObject.h"
  36
  37 namespace blink {
  38
  39 SubtreeLayoutScope::SubtreeLayoutScope(LayoutObject& root)
  40     : m_root(root)
  41 {
  42     RELEASE_ASSERT(m_root.document().view()->isInPerformLayout());
  43 }
  44
  45 SubtreeLayoutScope::~SubtreeLayoutScope()
  46 {
  47     RELEASE_ASSERT(!m_root.needsLayout());
  48
  49 #if ENABLE(ASSERT)
  50     for (auto* layoutObject : m_layoutObjectsToLayout)
  51         layoutObject->assertLaidOut();
  52 #endif
  53 }
  54
  55 void SubtreeLayoutScope::setNeedsLayout(LayoutObject* descendant, LayoutInvalidationReasonForTracing reason)
  56 {
  57     ASSERT(descendant->isDescendantOf(&m_root));
  58     descendant->setNeedsLayout(reason, MarkContainerChain, this);
  59 }
  60
  61 void SubtreeLayoutScope::setChildNeedsLayout(LayoutObject* descendant)
  62 {
  63     ASSERT(descendant->isDescendantOf(&m_root));
  64     descendant->setChildNeedsLayout(MarkContainerChain, this);
  65 }
  66
  67 void SubtreeLayoutScope::recordObjectMarkedForLayout(LayoutObject* layoutObject)
  68 {
  69 #if ENABLE(ASSERT)
  70     m_layoutObjectsToLayout.add(layoutObject);
  71 #endif
  72 }
  73
  74 }