зеркало из https://github.com/mozilla/gecko-dev.git
80 строки
2.8 KiB
C++
80 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_intl_LineBreaker_h__
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#define mozilla_intl_LineBreaker_h__
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#include "nscore.h"
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#include "nsISupports.h"
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#define NS_LINEBREAKER_NEED_MORE_TEXT -1
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namespace mozilla {
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namespace intl {
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class LineBreaker
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{
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public:
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NS_INLINE_DECL_REFCOUNTING(LineBreaker)
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enum {
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kWordBreak_Normal = 0, // default
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kWordBreak_BreakAll = 1, // break all
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kWordBreak_KeepAll = 2 // always keep
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};
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static already_AddRefed<LineBreaker> Create();
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int32_t Next(const char16_t* aText, uint32_t aLen, uint32_t aPos);
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int32_t Prev( const char16_t* aText, uint32_t aLen, uint32_t aPos);
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// Call this on a word with whitespace at either end. We will apply JISx4051
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// rules to find breaks inside the word. aBreakBefore is set to the break-
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// before status of each character; aBreakBefore[0] will always be false
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// because we never return a break before the first character.
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// aLength is the length of the aText array and also the length of the aBreakBefore
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// output array.
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void GetJISx4051Breaks(const char16_t* aText, uint32_t aLength,
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uint8_t aWordBreak,
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uint8_t* aBreakBefore);
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void GetJISx4051Breaks(const uint8_t* aText, uint32_t aLength,
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uint8_t aWordBreak,
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uint8_t* aBreakBefore);
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private:
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~LineBreaker() { }
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int32_t WordMove(const char16_t* aText, uint32_t aLen, uint32_t aPos,
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int8_t aDirection);
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};
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static inline bool
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NS_IsSpace(char16_t u)
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{
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return u == 0x0020 || // SPACE
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u == 0x0009 || // CHARACTER TABULATION
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u == 0x000D || // CARRIAGE RETURN
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(0x2000 <= u && u <= 0x2006) || // EN QUAD, EM QUAD, EN SPACE,
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// EM SPACE, THREE-PER-EM SPACE,
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// FOUR-PER-SPACE, SIX-PER-EM SPACE,
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(0x2008 <= u && u <= 0x200B) || // PUNCTUATION SPACE, THIN SPACE,
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// HAIR SPACE, ZERO WIDTH SPACE
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u == 0x1361 || // ETHIOPIC WORDSPACE
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u == 0x1680 || // OGHAM SPACE MARK
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u == 0x205F; // MEDIUM MATHEMATICAL SPACE
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}
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static inline bool
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NS_NeedsPlatformNativeHandling(char16_t aChar)
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{
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return (0x0e01 <= aChar && aChar <= 0x0fff) || // Thai, Lao, Tibetan
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(0x1780 <= aChar && aChar <= 0x17ff); // Khmer
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}
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} // namespace intl
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} // namespace mozilla
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#endif /* mozilla_intl_LineBreaker_h__ */
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