third_party/blink/renderer/core/layout/subtree_layout_scope.cc

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 *     * Redistributions in binary form must reproduce the above
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "third_party/blink/renderer/core/layout/subtree_layout_scope.h"

#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"

namespace blink {

SubtreeLayoutScope::SubtreeLayoutScope(LayoutObject& root) : root_(root) {
  CHECK(root_.GetDocument().View()->IsInPerformLayout());
}

SubtreeLayoutScope::~SubtreeLayoutScope() {
  CHECK(!root_.NeedsLayout() || root_.LayoutBlockedByDisplayLock());

#if DCHECK_IS_ON()
  for (auto* layout_object : layout_objects_to_layout_)
    layout_object->AssertLaidOut();
#endif
}

void SubtreeLayoutScope::SetNeedsLayout(
    LayoutObject* descendant,
    LayoutInvalidationReasonForTracing reason) {
  DCHECK(descendant->IsDescendantOf(&root_));
  descendant->SetNeedsLayout(reason, kMarkContainerChain, this);
}

void SubtreeLayoutScope::SetChildNeedsLayout(LayoutObject* descendant) {
  DCHECK(descendant->IsDescendantOf(&root_));
  descendant->SetChildNeedsLayout(kMarkContainerChain, this);
}

void SubtreeLayoutScope::RecordObjectMarkedForLayout(
    LayoutObject* layout_object) {
#if DCHECK_IS_ON()
  layout_objects_to_layout_.insert(layout_object);
#endif
}

}  // namespace blink