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#ifndef BREAK_LINES_H
#define BREAK_LINES_H
#include <qstring.h>
namespace khtml {
/*
array of unicode codes where breaking shouldn't occur.
(in sorted order because of using with binary search)
these are currently for Japanese, though simply adding
Korean, Chinese ones should work as well
*/
/*
dontbreakbefore[] contains characters not covered by QChar::Punctuation_Close that shouldn't be broken before.
chars included in QChar::Punctuation_Close are listed below.(look at UAX #14)
- 3001 ideographic comma
- 3002 ideographic full stop
- FE50 small comma
- FF52 small full stop
- FF0C fullwidth comma
- FF0E fullwidth full stop
- FF61 halfwidth ideographic full stop
- FF64 halfwidth ideographic comma
these character is commented out.
*/
const ushort dontbreakbefore[] = {
//0x3001, //ideographic comma
//0x3002, //ideographic full stop
0x3005, //ideographic iteration mark
0x3009, //right angle bracket
0x300b, //right double angle bracket
0x300d, //right corner bracket
0x300f, //right white corner bracket
0x3011, //right black lenticular bracket
0x3015, //right tortoise shell bracket
0x3041, //small a hiragana
0x3043, //small i hiragana
0x3045, //small u hiragana
0x3047, //small e hiragana
0x3049, //small o hiragana
0x3063, //small tsu hiragana
0x3083, //small ya hiragana
0x3085, //small yu hiragana
0x3087, //small yo hiragana
0x308E, //small wa hiragana
0x309B, //jap voiced sound mark
0x309C, //jap semi-voiced sound mark
0x309D, //jap iteration mark hiragana
0x309E, //jap voiced iteration mark hiragana
0x30A1, //small a katakana
0x30A3, //small i katakana
0x30A5, //small u katakana
0x30A7, //small e katakana
0x30A9, //small o katakana
0x30C3, //small tsu katakana
0x30E3, //small ya katakana
0x30E5, //small yu katakana
0x30E7, //small yo katakana
0x30EE, //small wa katakana
0x30F5, //small ka katakana
0x30F6, //small ke katakana
0x30FC, //jap prolonged sound mark
0x30FD, //jap iteration mark katakana
0x30FE, //jap voiced iteration mark katakana
//0xFE50, //small comma
//0xFF52, //small full stop
0xFF01, //fullwidth exclamation mark
0xFF09, //fullwidth right parenthesis
//0xFF0C, //fullwidth comma
0xFF0D, //fullwidth hypen-minus
//0xFF0E, //fullwidth full stop
0xFF1F, //fullwidth question mark
0xFF3D, //fullwidth right square bracket
0xFF5D, //fullwidth right curly bracket
//0xFF61, //halfwidth ideographic full stop
0xFF63, //halfwidth right corner bracket
//0xFF64, //halfwidth ideographic comma
0xFF67, //halfwidth katakana letter small a
0xFF68, //halfwidth katakana letter small i
0xFF69, //halfwidth katakana letter small u
0xFF6a, //halfwidth katakana letter small e
0xFF6b, //halfwidth katakana letter small o
0xFF6c, //halfwidth katakana letter small ya
0xFF6d, //halfwidth katakana letter small yu
0xFF6e, //halfwidth katakana letter small yo
0xFF6f, //halfwidth katakana letter small tu
0xFF70 //halfwidth katakana-hiragana prolonged sound mark
};
// characters that aren't covered by QChar::Punctuation_Open
const ushort dontbreakafter[] = {
0x3012, //postal mark
0xFF03, //full width pound mark
0xFF04, //full width dollar sign
0xFF20, //full width @
0xFFE1, //full width british pound sign
0xFFE5 //full width yen sign
};
inline bool break_bsearch( const ushort* arr, const ushort val ) {
int left = 0;
int right = (sizeof(arr) / sizeof(ushort)) - 1;
while (1) {
if (left == right)
return val != arr[left];
int i = (left + right) >> 1;
if ( val == arr[i] )
return false;
if ( val < arr[i] )
right = i;
else
left = i + 1;
}
}
bool isBreakableThai( const QChar *string, const int pos, const int len);
void cleanup_thaibreaks();
inline bool isBreakable( const QChar *str, const int pos, int len )
{
const QChar *c = str+pos;
unsigned short ch = c->unicode();
if ( ch > 0xff ) {
// not latin1, need to do more sophisticated checks for asian fonts
unsigned char row = c->row();
if ( row == 0x0e ) {
// 0e00 - 0e7f == Thai
if ( c->cell() < 0x80 ) {
// consult libthai
return isBreakableThai(str, pos, len);
} else
return false;
}
if ( row > 0x2d && row < 0xfb || row == 0x11 ) {
/* asian line breaking. */
if ( pos == 0 )
return false; // never break before first character
// check for simple punctuation cases
QChar::Category cat = c->category();
if ( cat == QChar::Punctuation_Close ||
cat == QChar::Punctuation_Other ||
(str+(pos-1))->category() == QChar::Punctuation_Open )
return false;
// do binary search in dontbreak[]
return break_bsearch(dontbreakbefore, c->unicode()) &&
break_bsearch(dontbreakafter, (str+(pos-1))->unicode());
} else // no asian font
return c->isSpace();
} else {
if ( ch == ' ' || ch == '\n' )
return true;
}
return false;
}
}
#endif
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