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e0fd75b5ab
This caused us to lose our gn check certification. :( Turns out gn check was just ignoring all the header paths it didn't understand and so gn check passing for sky wasn't meaning much. I tried to straighten out some of the mess in this CL, but its going to take several more rounds of massaging before gn check passes again. On the bright side (almost) all of our headers are absolute now. Turns out my script (attached to the bug) didn't notice ../ includes but I'll fix that in the next patch. R=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/746023002
96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
/*
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* Copyright (C) 2003, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2008 Holger Hans Peter Freyther
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* Copyright (C) Research In Motion Limited 2011. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "sky/engine/config.h"
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#include "sky/engine/platform/text/SurrogatePairAwareTextIterator.h"
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#include <unicode/unorm.h>
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using namespace WTF;
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using namespace Unicode;
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namespace blink {
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SurrogatePairAwareTextIterator::SurrogatePairAwareTextIterator(const UChar* characters, int currentCharacter, int lastCharacter, int endCharacter)
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: m_characters(characters)
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, m_currentCharacter(currentCharacter)
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, m_lastCharacter(lastCharacter)
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, m_endCharacter(endCharacter)
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{
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}
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bool SurrogatePairAwareTextIterator::consumeSlowCase(UChar32& character, unsigned& clusterLength)
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{
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if (character <= 0x30FE) {
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// Deal with Hiragana and Katakana voiced and semi-voiced syllables.
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// Normalize into composed form, and then look for glyph with base + combined mark.
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// Check above for character range to minimize performance impact.
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if (UChar32 normalized = normalizeVoicingMarks()) {
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character = normalized;
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clusterLength = 2;
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}
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return true;
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}
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if (!U16_IS_SURROGATE(character))
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return true;
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// If we have a surrogate pair, make sure it starts with the high part.
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if (!U16_IS_SURROGATE_LEAD(character))
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return false;
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// Do we have a surrogate pair? If so, determine the full Unicode (32 bit) code point before glyph lookup.
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// Make sure we have another character and it's a low surrogate.
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if (m_currentCharacter + 1 >= m_endCharacter)
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return false;
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UChar low = m_characters[1];
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if (!U16_IS_TRAIL(low))
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return false;
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character = U16_GET_SUPPLEMENTARY(character, low);
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clusterLength = 2;
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return true;
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}
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UChar32 SurrogatePairAwareTextIterator::normalizeVoicingMarks()
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{
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// According to http://www.unicode.org/Public/UNIDATA/UCD.html#Canonical_Combining_Class_Values
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static const uint8_t hiraganaKatakanaVoicingMarksCombiningClass = 8;
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if (m_currentCharacter + 1 >= m_endCharacter)
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return 0;
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if (combiningClass(m_characters[1]) == hiraganaKatakanaVoicingMarksCombiningClass) {
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// Normalize into composed form using 3.2 rules.
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UChar normalizedCharacters[2] = { 0, 0 };
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UErrorCode uStatus = U_ZERO_ERROR;
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int32_t resultLength = unorm_normalize(m_characters, 2, UNORM_NFC, UNORM_UNICODE_3_2, &normalizedCharacters[0], 2, &uStatus);
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if (resultLength == 1 && !uStatus)
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return normalizedCharacters[0];
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}
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return 0;
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}
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}
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