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/*
* 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.
*/
#include "config.h"
#include "SimpleLineLayoutFlowContents.h"
#include "RenderBlockFlow.h"
#include "RenderChildIterator.h"
#include "RenderLineBreak.h"
#include "RenderText.h"
namespace WebCore {
namespace SimpleLineLayout {
static Vector<FlowContents::Segment> initializeSegments(const RenderBlockFlow& flow)
{
unsigned numberOfChildren = 0;
auto children = childrenOfType<RenderObject>(flow);
for (auto it = children.begin(), end = children.end(); it != end; ++it)
++numberOfChildren;
Vector<FlowContents::Segment> segments;
segments.reserveCapacity(numberOfChildren);
unsigned startPosition = 0;
for (auto& child : childrenOfType<RenderObject>(flow)) {
if (is<RenderText>(child)) {
auto& textChild = downcast<RenderText>(child);
unsigned textLength = textChild.text()->length();
segments.append(FlowContents::Segment { startPosition, startPosition + textLength, textChild.text(),
textChild, textChild.canUseSimplifiedTextMeasuring() });
startPosition += textLength;
continue;
}
if (is<RenderLineBreak>(child)) {
segments.append(FlowContents::Segment { startPosition, startPosition, String(), child, true });
continue;
}
ASSERT_NOT_REACHED();
}
return segments;
}
FlowContents::FlowContents(const RenderBlockFlow& flow)
: m_segments(initializeSegments(flow))
{
}
unsigned FlowContents::segmentIndexForRunSlow(unsigned start, unsigned end) const
{
auto isEmptyRange = start == end;
auto it = std::lower_bound(m_segments.begin(), m_segments.end(), start, [isEmptyRange](const Segment& segment, unsigned start) {
// FIXME: This always find the first empty run (.vs subsequent <br> elements)
return (isEmptyRange && segment.start == segment.end) ? segment.start < start : segment.end <= start;
});
ASSERT(it != m_segments.end());
ASSERT(end <= it->end);
m_lastSegmentIndex = it - m_segments.begin();
return m_lastSegmentIndex;
}
}
}
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