53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
/*
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Copyright (C) 2014 Apple Inc. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "InlineIterator.h"
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namespace WebCore {
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UCharDirection InlineIterator::surrogateTextDirection(UChar currentCodeUnit) const
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{
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RenderText& text = downcast<RenderText>(*m_renderer);
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UChar lead;
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UChar trail;
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if (U16_IS_LEAD(currentCodeUnit)) {
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lead = currentCodeUnit;
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trail = text.characterAt(m_pos + 1);
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if (!U16_IS_TRAIL(trail))
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return U_OTHER_NEUTRAL;
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} else {
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ASSERT(U16_IS_TRAIL(currentCodeUnit));
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lead = text.characterAt(m_pos - 1);
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if (!U16_IS_LEAD(lead))
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return U_OTHER_NEUTRAL;
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trail = currentCodeUnit;
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}
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return u_charDirection(U16_GET_SUPPLEMENTARY(lead, trail));
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}
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}
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