| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_SUBTREE_LAYOUT_SCOPE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_SUBTREE_LAYOUT_SCOPE_H_ |
| |
| #include "base/dcheck_is_on.h" |
| #include "third_party/blink/renderer/core/inspector/inspector_trace_events.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_set.h" |
| |
| // This is the way to mark a subtree as needing layout during layout, |
| // e.g. for the purposes of doing a multipass layout. |
| // |
| // It should only be used during layout. Outside of layout, you should |
| // just call layoutObject->setNeedsLayout() directly. |
| // |
| // It ensures that you don't accidentally mark part of the tree as |
| // needing layout and not actually lay it out. |
| |
| namespace blink { |
| |
| class LayoutObject; |
| |
| class SubtreeLayoutScope { |
| STACK_ALLOCATED(); |
| |
| public: |
| SubtreeLayoutScope(LayoutObject& root); |
| ~SubtreeLayoutScope(); |
| |
| void SetNeedsLayout(LayoutObject* descendant, |
| LayoutInvalidationReasonForTracing); |
| void SetChildNeedsLayout(LayoutObject* descendant); |
| |
| LayoutObject& Root() { return root_; } |
| void RecordObjectMarkedForLayout(LayoutObject*); |
| |
| private: |
| LayoutObject& root_; |
| |
| #if DCHECK_IS_ON() |
| HashSet<LayoutObject*> layout_objects_to_layout_; |
| #endif |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_SUBTREE_LAYOUT_SCOPE_H_ |