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/rendering/LayoutRectRecorder.h"
33
34 #include "core/rendering/RenderObject.h"
35
36 namespace WebCore {
37
shouldRecordLayoutRects()38 bool LayoutRectRecorder::shouldRecordLayoutRects()
39 {
40 bool isTracing;
41 TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"), &isTracing);
42 return RuntimeEnabledFeatures::repaintAfterLayoutEnabled() || isTracing;
43 }
44
LayoutRectRecorder(RenderObject & object,bool skipRecording)45 LayoutRectRecorder::LayoutRectRecorder(RenderObject& object, bool skipRecording)
46 : m_object(object)
47 , m_skipRecording(skipRecording)
48 {
49 if (!shouldRecordLayoutRects())
50 return;
51 if (m_skipRecording)
52 return;
53
54 if (!m_object.layoutDidGetCalled())
55 m_object.setOldRepaintRect(m_object.clippedOverflowRectForRepaint(m_object.containerForRepaint()));
56
57 // If should do repaint was set previously make sure we don't accidentally unset it.
58 if (!m_object.shouldDoFullRepaintAfterLayout())
59 m_object.setShouldDoFullRepaintAfterLayout(m_object.selfNeedsLayout());
60
61 m_object.setLayoutDidGetCalled(true);
62 }
63
~LayoutRectRecorder()64 LayoutRectRecorder::~LayoutRectRecorder()
65 {
66 if (!shouldRecordLayoutRects())
67 return;
68 if (m_skipRecording)
69 return;
70
71 // Note, we don't store the repaint container because it can change during layout.
72 m_object.setNewRepaintRect(m_object.clippedOverflowRectForRepaint(m_object.containerForRepaint()));
73 }
74
75 } // namespace WebCore
76
77