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Diffstat (limited to 'Source/WebCore/rendering/SimpleLineLayoutFlowContents.h')
-rw-r--r-- | Source/WebCore/rendering/SimpleLineLayoutFlowContents.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/SimpleLineLayoutFlowContents.h b/Source/WebCore/rendering/SimpleLineLayoutFlowContents.h new file mode 100644 index 000000000..1a7d6558a --- /dev/null +++ b/Source/WebCore/rendering/SimpleLineLayoutFlowContents.h @@ -0,0 +1,74 @@ +/* + * Copyright (C) 2014 Apple 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: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. + */ + +#pragma once + +#include "RenderObject.h" + +namespace WebCore { +class RenderBlockFlow; + +namespace SimpleLineLayout { + +class FlowContents { +public: + FlowContents(const RenderBlockFlow&); + + struct Segment { + unsigned toSegmentPosition(unsigned position) const + { + ASSERT(position >= start); + return position - start; + } + unsigned toRenderPosition(unsigned position) const { return start + position; } + unsigned start; + unsigned end; + StringView text; + const RenderObject& renderer; + bool canUseSimplifiedTextMeasuring; + }; + const Segment& segmentForRun(unsigned start, unsigned end) const; + + typedef Vector<Segment, 8>::const_iterator Iterator; + Iterator begin() const { return m_segments.begin(); } + Iterator end() const { return m_segments.end(); } + +private: + unsigned segmentIndexForRunSlow(unsigned start, unsigned end) const; + const Vector<Segment, 8> m_segments; + mutable unsigned m_lastSegmentIndex { 0 }; +}; + +inline const FlowContents::Segment& FlowContents::segmentForRun(unsigned start, unsigned end) const +{ + ASSERT(start <= end); + auto& lastSegment = m_segments[m_lastSegmentIndex]; + if (lastSegment.start <= start && end <= lastSegment.end) + return m_segments[m_lastSegmentIndex]; + return m_segments[segmentIndexForRunSlow(start, end)]; +} + +} +} |