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97 lines
3.8 KiB
C++
97 lines
3.8 KiB
C++
/*
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* Copyright (C) 2014 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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*/
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#ifndef SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_
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#define SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_
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#include "flutter/sky/engine/platform/PlatformExport.h"
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#include "flutter/sky/engine/platform/text/TextDirection.h"
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#include "flutter/sky/engine/platform/text/TextPath.h"
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#include "flutter/sky/engine/wtf/HashSet.h"
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#include "flutter/sky/engine/wtf/text/WTFString.h"
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#include "flutter/sky/engine/wtf/unicode/CharacterNames.h"
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namespace blink {
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class PLATFORM_EXPORT Character {
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public:
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static CodePath characterRangeCodePath(const LChar*, unsigned) {
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return SimplePath;
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}
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static CodePath characterRangeCodePath(const UChar*, unsigned len);
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static bool isCJKIdeograph(UChar32);
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static bool isCJKIdeographOrSymbol(UChar32);
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static unsigned expansionOpportunityCount(const LChar*,
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size_t length,
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TextDirection,
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bool& isAfterExpansion);
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static unsigned expansionOpportunityCount(const UChar*,
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size_t length,
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TextDirection,
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bool& isAfterExpansion);
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static bool treatAsSpace(UChar c) {
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return c == ' ' || c == '\t' || c == '\n' || c == noBreakSpace;
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}
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static bool treatAsZeroWidthSpace(UChar c) {
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return treatAsZeroWidthSpaceInComplexScript(c) || c == 0x200c ||
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c == 0x200d;
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}
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static bool treatAsZeroWidthSpaceInComplexScript(UChar c) {
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return c < 0x20 || (c >= 0x7F && c < 0xA0) || c == softHyphen ||
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c == zeroWidthSpace || (c >= 0x200e && c <= 0x200f) ||
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(c >= 0x202a && c <= 0x202e) || c == zeroWidthNoBreakSpace ||
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c == objectReplacementCharacter;
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}
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static bool canReceiveTextEmphasis(UChar32);
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static inline UChar normalizeSpaces(UChar character) {
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if (treatAsSpace(character))
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return space;
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if (treatAsZeroWidthSpace(character))
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return zeroWidthSpace;
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return character;
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}
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static String normalizeSpaces(const LChar*, unsigned length);
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static String normalizeSpaces(const UChar*, unsigned length);
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private:
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Character();
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};
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} // namespace blink
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#endif // SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_
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