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/* -*- 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 nsILineBreaker_h__
#define nsILineBreaker_h__
#include "nsISupports.h"
#include "nscore.h"
#define NS_LINEBREAKER_NEED_MORE_TEXT -1
// {0x4b0b9e04-6ffb-4647-aa5f-2fa2ebd883e8}
#define NS_ILINEBREAKER_IID \
{0x4b0b9e04, 0x6ffb, 0x4647, \
{0xaa, 0x5f, 0x2f, 0xa2, 0xeb, 0xd8, 0x83, 0xe8}}
class nsILineBreaker : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ILINEBREAKER_IID)
enum {
kWordBreak_Normal = 0, // default
kWordBreak_BreakAll = 1, // break all
kWordBreak_KeepAll = 2 // always keep
};
virtual int32_t Next( const char16_t* aText, uint32_t aLen,
uint32_t aPos) = 0;
virtual int32_t Prev( const char16_t* aText, uint32_t aLen,
uint32_t aPos) = 0;
// 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.
virtual void GetJISx4051Breaks(const char16_t* aText, uint32_t aLength,
uint8_t aWordBreak,
uint8_t* aBreakBefore) = 0;
virtual void GetJISx4051Breaks(const uint8_t* aText, uint32_t aLength,
uint8_t aWordBreak,
uint8_t* aBreakBefore) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsILineBreaker, NS_ILINEBREAKER_IID)
static inline bool
NS_IsSpace(char16_t u)
{
return u == 0x0020 || // SPACE
u == 0x0009 || // CHARACTER TABULATION
u == 0x000D || // CARRIAGE RETURN
u == 0x1680 || // OGHAM SPACE MARK
(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 == 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
}
#endif /* nsILineBreaker_h__ */
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