зеркало из https://github.com/mozilla/gecko-dev.git
83 строки
3.0 KiB
C++
83 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
#ifndef mozilla_intl_LineBreaker_h__
|
|
#define mozilla_intl_LineBreaker_h__
|
|
|
|
#include "nscore.h"
|
|
#include "nsISupports.h"
|
|
|
|
#define NS_LINEBREAKER_NEED_MORE_TEXT -1
|
|
|
|
namespace mozilla {
|
|
namespace intl {
|
|
|
|
class LineBreaker {
|
|
public:
|
|
NS_INLINE_DECL_REFCOUNTING(LineBreaker)
|
|
|
|
enum class WordBreak : uint8_t {
|
|
Normal = 0, // default
|
|
BreakAll = 1, // break all
|
|
KeepAll = 2 // always keep
|
|
};
|
|
|
|
enum class Strictness : uint8_t {
|
|
Auto = 0,
|
|
Loose = 1,
|
|
Normal = 2,
|
|
Strict = 3,
|
|
Anywhere = 4
|
|
};
|
|
|
|
static already_AddRefed<LineBreaker> Create();
|
|
|
|
int32_t Next(const char16_t* aText, uint32_t aLen, uint32_t aPos);
|
|
|
|
int32_t Prev(const char16_t* aText, uint32_t aLen, uint32_t aPos);
|
|
|
|
// Call this on a word with whitespace at either end. We will apply JISx4051
|
|
// rules to find breaks inside the word. aBreakBefore is set to the break-
|
|
// before status of each character; aBreakBefore[0] will always be false
|
|
// because we never return a break before the first character.
|
|
// aLength is the length of the aText array and also the length of the
|
|
// aBreakBefore output array.
|
|
void GetJISx4051Breaks(const char16_t* aText, uint32_t aLength,
|
|
WordBreak aWordBreak, Strictness aLevel,
|
|
bool aIsChineseOrJapanese, uint8_t* aBreakBefore);
|
|
void GetJISx4051Breaks(const uint8_t* aText, uint32_t aLength,
|
|
WordBreak aWordBreak, Strictness aLevel,
|
|
bool aIsChineseOrJapanese, uint8_t* aBreakBefore);
|
|
|
|
private:
|
|
~LineBreaker() = default;
|
|
|
|
int32_t WordMove(const char16_t* aText, uint32_t aLen, uint32_t aPos,
|
|
int8_t aDirection);
|
|
};
|
|
|
|
static inline bool NS_IsSpace(char16_t u) {
|
|
return u == 0x0020 || // SPACE
|
|
u == 0x0009 || // CHARACTER TABULATION
|
|
u == 0x000D || // CARRIAGE RETURN
|
|
(0x2000 <= u && u <= 0x2006) || // EN QUAD, EM QUAD, EN SPACE,
|
|
// EM SPACE, THREE-PER-EM SPACE,
|
|
// FOUR-PER-SPACE, SIX-PER-EM SPACE,
|
|
(0x2008 <= u && u <= 0x200B) || // PUNCTUATION SPACE, THIN SPACE,
|
|
// HAIR SPACE, ZERO WIDTH SPACE
|
|
u == 0x1361 || // ETHIOPIC WORDSPACE
|
|
u == 0x1680 || // OGHAM SPACE MARK
|
|
u == 0x205F; // MEDIUM MATHEMATICAL SPACE
|
|
}
|
|
|
|
static inline bool NS_NeedsPlatformNativeHandling(char16_t aChar) {
|
|
return (0x0e01 <= aChar && aChar <= 0x0fff) || // Thai, Lao, Tibetan
|
|
(0x1780 <= aChar && aChar <= 0x17ff); // Khmer
|
|
}
|
|
|
|
} // namespace intl
|
|
} // namespace mozilla
|
|
|
|
#endif /* mozilla_intl_LineBreaker_h__ */
|