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c3dc9edc25
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com> Signed-off-by: Aric Stewart <aric@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
443 lines
14 KiB
C
443 lines
14 KiB
C
/*
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* Implementation of line breaking algorithm for the Uniscribe Script Processor
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*
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* Copyright 2011 CodeWeavers, Aric Stewart
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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#include "config.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winuser.h"
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#include "wingdi.h"
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#include "winnls.h"
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#include "usp10.h"
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#include "winternl.h"
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#include "wine/debug.h"
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#include "usp10_internal.h"
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WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
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extern const unsigned short wine_linebreak_table[] DECLSPEC_HIDDEN;
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enum breaking_types {
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b_BK=1, b_CR, b_LF, b_CM, b_SG, b_GL, b_CB, b_SP, b_ZW, b_NL, b_WJ, b_JL, b_JV, b_JT, b_H2, b_H3, b_XX, b_OP, b_CL,
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b_CP, b_QU, b_NS, b_EX, b_SY, b_IS, b_PR, b_PO, b_NU, b_AL, b_ID, b_IN, b_HY, b_BB, b_BA, b_SA, b_AI, b_B2, b_HL,
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b_CJ, b_RI, b_EB, b_EM, b_ZWJ
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};
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enum breaking_class {b_r=1, b_s, b_x};
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static void debug_output_breaks(const short* breaks, int count)
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{
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if (TRACE_ON(uniscribe))
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{
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int i;
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TRACE("[");
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for (i = 0; i < count && i < 200; i++)
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{
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switch (breaks[i])
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{
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case b_x: TRACE("x"); break;
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case b_r: TRACE("!"); break;
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case b_s: TRACE("+"); break;
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default: TRACE("*");
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}
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}
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if (i == 200)
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TRACE("...");
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TRACE("]\n");
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}
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}
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static inline void else_break(short* before, short class)
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{
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if (*before == 0) *before = class;
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}
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void BREAK_line(const WCHAR *chars, int count, const SCRIPT_ANALYSIS *sa, SCRIPT_LOGATTR *la)
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{
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int i,j;
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short *break_class;
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short *break_before;
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TRACE("In %s\n",debugstr_wn(chars,count));
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break_class = heap_alloc(count * sizeof(*break_class));
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break_before = heap_alloc(count * sizeof(*break_before));
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for (i = 0; i < count; i++)
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{
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break_class[i] = get_table_entry( wine_linebreak_table, chars[i] );
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break_before[i] = 0;
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memset(&la[i],0,sizeof(SCRIPT_LOGATTR));
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la[i].fCharStop = TRUE;
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switch (break_class[i])
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{
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case b_BK:
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case b_ZW:
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case b_SP:
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la[i].fWhiteSpace = TRUE;
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break;
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case b_CM:
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la[i].fCharStop = FALSE;
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break;
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}
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}
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/* LB1 */
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/* TODO: Have outside algorithms for these scripts */
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for (i = 0; i < count; i++)
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{
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switch(break_class[i])
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{
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case b_AI:
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case b_SA:
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case b_SG:
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case b_XX:
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break_class[i] = b_AL;
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break;
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case b_CJ:
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break_class[i] = b_NS;
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break;
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}
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}
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/* LB2 - LB3 */
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break_before[0] = b_x;
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for (i = 0; i < count; i++)
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{
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switch(break_class[i])
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{
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/* LB4 - LB6 */
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case b_CR:
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if (i < count-1 && break_class[i+1] == b_LF)
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{
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else_break(&break_before[i],b_x);
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else_break(&break_before[i+1],b_x);
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break;
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}
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case b_LF:
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case b_NL:
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case b_BK:
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if (i < count-1) else_break(&break_before[i+1],b_r);
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else_break(&break_before[i],b_x);
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break;
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/* LB7 */
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case b_SP:
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else_break(&break_before[i],b_x);
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break;
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case b_ZW:
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else_break(&break_before[i],b_x);
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/* LB8 */
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while (i < count-1 && break_class[i+1] == b_SP)
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i++;
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else_break(&break_before[i],b_s);
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break;
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}
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}
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debug_output_breaks(break_before,count);
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/* LB9 - LB10 */
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for (i = 0; i < count; i++)
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{
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if (break_class[i] == b_CM)
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{
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if (i > 0)
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{
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switch (break_class[i-1])
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{
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case b_SP:
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case b_BK:
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case b_CR:
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case b_LF:
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case b_NL:
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case b_ZW:
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break_class[i] = b_AL;
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break;
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default:
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break_class[i] = break_class[i-1];
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}
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}
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else break_class[i] = b_AL;
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}
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}
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for (i = 0; i < count; i++)
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{
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switch(break_class[i])
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{
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/* LB11 */
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case b_WJ:
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else_break(&break_before[i],b_x);
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if (i < count-1)
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else_break(&break_before[i+1],b_x);
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break;
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/* LB12 */
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case b_GL:
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if (i < count-1)
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else_break(&break_before[i+1],b_x);
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/* LB12a */
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if (i > 0)
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{
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if (break_class[i-1] != b_SP &&
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break_class[i-1] != b_BA &&
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break_class[i-1] != b_HY)
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else_break(&break_before[i],b_x);
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}
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break;
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/* LB13 */
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case b_CL:
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case b_CP:
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case b_EX:
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case b_IS:
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case b_SY:
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else_break(&break_before[i],b_x);
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break;
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/* LB14 */
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case b_OP:
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while (i < count-1 && break_class[i+1] == b_SP)
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{
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else_break(&break_before[i+1],b_x);
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i++;
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}
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else_break(&break_before[i+1],b_x);
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break;
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/* LB15 */
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case b_QU:
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j = i+1;
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while (j < count-1 && break_class[j] == b_SP)
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j++;
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if (break_class[j] == b_OP)
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{
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for (; j > i; j--)
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else_break(&break_before[j],b_x);
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}
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break;
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/* LB16 */
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case b_NS:
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j = i-1;
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while(j > 0 && break_class[j] == b_SP)
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j--;
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if (break_class[j] == b_CL || break_class[j] == b_CP)
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{
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for (j++; j <= i; j++)
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else_break(&break_before[j],b_x);
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}
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break;
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/* LB17 */
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case b_B2:
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j = i+1;
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while (j < count && break_class[j] == b_SP)
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j++;
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if (break_class[j] == b_B2)
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{
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for (; j > i; j--)
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else_break(&break_before[j],b_x);
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}
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break;
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}
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}
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debug_output_breaks(break_before,count);
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for (i = 0; i < count; i++)
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{
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switch(break_class[i])
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{
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/* LB18 */
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case b_SP:
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if (i < count-1)
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else_break(&break_before[i+1],b_s);
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break;
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/* LB19 */
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case b_QU:
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else_break(&break_before[i],b_x);
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if (i < count-1)
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else_break(&break_before[i+1],b_x);
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break;
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/* LB20 */
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case b_CB:
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else_break(&break_before[i],b_s);
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if (i < count-1)
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else_break(&break_before[i+1],b_s);
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break;
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/* LB21 */
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case b_BA:
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case b_HY:
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case b_NS:
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else_break(&break_before[i],b_x);
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break;
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case b_BB:
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if (i < count-1)
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else_break(&break_before[i+1],b_x);
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break;
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/* LB21a */
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case b_HL:
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if (i < count-2)
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switch (break_class[i+1])
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{
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case b_HY:
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case b_BA:
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else_break(&break_before[i+2], b_x);
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}
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break;
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/* LB22 */
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case b_IN:
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if (i > 0)
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{
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switch (break_class[i-1])
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{
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case b_AL:
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case b_HL:
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case b_ID:
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case b_IN:
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case b_NU:
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else_break(&break_before[i], b_x);
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}
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}
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break;
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}
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if (i < count-1)
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{
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/* LB23 */
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if ((break_class[i] == b_ID && break_class[i+1] == b_PO) ||
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(break_class[i] == b_AL && break_class[i+1] == b_NU) ||
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(break_class[i] == b_HL && break_class[i+1] == b_NU) ||
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(break_class[i] == b_NU && break_class[i+1] == b_AL) ||
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(break_class[i] == b_NU && break_class[i+1] == b_HL))
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else_break(&break_before[i+1],b_x);
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/* LB24 */
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if ((break_class[i] == b_PR && break_class[i+1] == b_ID) ||
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(break_class[i] == b_PR && break_class[i+1] == b_AL) ||
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(break_class[i] == b_PR && break_class[i+1] == b_HL) ||
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(break_class[i] == b_PO && break_class[i+1] == b_AL) ||
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(break_class[i] == b_PO && break_class[i+1] == b_HL))
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else_break(&break_before[i+1],b_x);
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/* LB25 */
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if ((break_class[i] == b_CL && break_class[i+1] == b_PO) ||
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(break_class[i] == b_CP && break_class[i+1] == b_PO) ||
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(break_class[i] == b_CL && break_class[i+1] == b_PR) ||
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(break_class[i] == b_CP && break_class[i+1] == b_PR) ||
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(break_class[i] == b_NU && break_class[i+1] == b_PO) ||
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(break_class[i] == b_NU && break_class[i+1] == b_PR) ||
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(break_class[i] == b_PO && break_class[i+1] == b_OP) ||
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(break_class[i] == b_PO && break_class[i+1] == b_NU) ||
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(break_class[i] == b_PR && break_class[i+1] == b_OP) ||
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(break_class[i] == b_PR && break_class[i+1] == b_NU) ||
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(break_class[i] == b_HY && break_class[i+1] == b_NU) ||
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(break_class[i] == b_IS && break_class[i+1] == b_NU) ||
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(break_class[i] == b_NU && break_class[i+1] == b_NU) ||
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(break_class[i] == b_SY && break_class[i+1] == b_NU))
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else_break(&break_before[i+1],b_x);
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/* LB26 */
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if (break_class[i] == b_JL)
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{
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switch (break_class[i+1])
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{
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case b_JL:
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case b_JV:
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case b_H2:
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case b_H3:
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else_break(&break_before[i+1],b_x);
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}
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}
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if ((break_class[i] == b_JV || break_class[i] == b_H2) &&
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(break_class[i+1] == b_JV || break_class[i+1] == b_JT))
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else_break(&break_before[i+1],b_x);
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if ((break_class[i] == b_JT || break_class[i] == b_H3) &&
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break_class[i+1] == b_JT)
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else_break(&break_before[i+1],b_x);
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/* LB27 */
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switch (break_class[i])
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{
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case b_JL:
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case b_JV:
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case b_JT:
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case b_H2:
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case b_H3:
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if (break_class[i+1] == b_IN || break_class[i+1] == b_PO)
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else_break(&break_before[i+1],b_x);
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}
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if (break_class[i] == b_PR)
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{
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switch (break_class[i+1])
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{
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case b_JL:
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case b_JV:
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case b_JT:
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case b_H2:
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case b_H3:
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else_break(&break_before[i+1],b_x);
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}
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}
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/* LB28 */
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if ((break_class[i] == b_AL && break_class[i+1] == b_AL) ||
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(break_class[i] == b_AL && break_class[i+1] == b_HL) ||
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(break_class[i] == b_HL && break_class[i+1] == b_AL) ||
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(break_class[i] == b_HL && break_class[i+1] == b_HL))
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else_break(&break_before[i+1],b_x);
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/* LB29 */
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if ((break_class[i] == b_IS && break_class[i+1] == b_AL) ||
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(break_class[i] == b_IS && break_class[i+1] == b_HL))
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else_break(&break_before[i+1],b_x);
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/* LB30 */
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if ((break_class[i] == b_AL || break_class[i] == b_HL || break_class[i] == b_NU) &&
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break_class[i+1] == b_OP)
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else_break(&break_before[i+1],b_x);
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if (break_class[i] == b_CP &&
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(break_class[i+1] == b_AL || break_class[i+1] == b_HL || break_class[i+1] == b_NU))
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else_break(&break_before[i+1],b_x);
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/* LB30a */
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if (break_class[i] == b_RI && break_class[i+1] == b_RI)
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else_break(&break_before[i+1],b_x);
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}
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}
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debug_output_breaks(break_before,count);
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/* LB31 */
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for (i = 0; i < count-1; i++)
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else_break(&break_before[i+1],b_s);
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debug_output_breaks(break_before,count);
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for (i = 0; i < count; i++)
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{
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if (break_before[i] != b_x)
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{
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la[i].fSoftBreak = TRUE;
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la[i].fWordStop = TRUE;
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}
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}
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heap_free(break_before);
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heap_free(break_class);
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}
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