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70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
// Copyright (C) 2013 Google Inc. All rights reserved.
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//
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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 are
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// met:
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//
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// * 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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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// 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
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_
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#define SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_
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#include "flutter/sky/engine/platform/text/TextRun.h"
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namespace blink {
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class TextRunIterator {
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public:
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TextRunIterator() : m_textRun(0), m_offset(0) {}
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TextRunIterator(const TextRun* textRun, unsigned offset)
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: m_textRun(textRun), m_offset(offset) {}
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TextRunIterator(const TextRunIterator& other)
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: m_textRun(other.m_textRun), m_offset(other.m_offset) {}
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unsigned offset() const { return m_offset; }
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void increment() { m_offset++; }
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bool atEnd() const { return !m_textRun || m_offset >= m_textRun->length(); }
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UChar current() const { return (*m_textRun)[m_offset]; }
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WTF::Unicode::Direction direction() const {
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return atEnd() ? WTF::Unicode::OtherNeutral
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: WTF::Unicode::direction(current());
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}
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bool atParagraphSeparator() const { return current() == '\n'; }
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bool operator==(const TextRunIterator& other) {
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return m_offset == other.m_offset && m_textRun == other.m_textRun;
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}
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bool operator!=(const TextRunIterator& other) { return !operator==(other); }
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private:
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const TextRun* m_textRun;
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int m_offset;
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};
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_TEXT_TEXTRUNITERATOR_H_
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