summaryrefslogtreecommitdiff
path: root/modules/om/generic/omTextEsc.c
blob: ad262ef242c09abc3f3b6ec8c5f7bdd73f114a07 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
/* $Xorg: omTextEsc.c,v 1.3 2000/08/17 19:45:22 cpqbld Exp $ */
/*
 * Copyright 1992, 1993 by TOSHIBA Corp.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of TOSHIBA not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. TOSHIBA make no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * TOSHIBA DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * TOSHIBA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 *
 * Author: Katsuhisa Yano	TOSHIBA Corp.
 *			   	mopi@osa.ilab.toshiba.co.jp
 */
/* $XFree86: xc/lib/X11/omTextEsc.c,v 1.5 2001/01/17 19:41:56 dawes Exp $ */
/*
 * Copyright 1995 by FUJITSU LIMITED
 * This is source code modified by FUJITSU LIMITED under the Joint
 * Development Agreement for the CDE/Motif PST.
 */

#include "Xlibint.h"
#include "XomGeneric.h"
#include <stdio.h>

/* For VW/UDC start */

#define	VMAP		0
#define	VROTATE		1
#define	FONTSCOPE	2

static int
is_rotate(oc, font)
    XOC         oc;
    XFontStruct *font;
{
    XOCGenericPart      *gen = XOC_GENERIC(oc);
    FontSet             font_set;
    VRotate             vrotate;
    int                 font_set_count;
    int                 vrotate_num;

    font_set = gen->font_set;
    font_set_count = gen->font_set_num;
    for( ; font_set_count-- ; font_set++) {
	if((font_set->vrotate_num > 0) && (font_set->vrotate != NULL)) {
	    vrotate = font_set->vrotate;
	    vrotate_num = font_set->vrotate_num;
	    for( ; vrotate_num-- ; vrotate++)
		if(vrotate->font == font)
		    return True;
	}
    }
    return False;
}

static int
is_codemap(oc, font)
    XOC         oc;
    XFontStruct *font;
{
    XOCGenericPart      *gen = XOC_GENERIC(oc);
    FontSet             font_set;
    FontData            vmap;
    int                 font_set_count;
    int                 vmap_num;

    font_set = gen->font_set;
    font_set_count = gen->font_set_num;
    for( ; font_set_count-- ; font_set++) {
	if(font_set->vmap_num > 0) {
	    vmap = font_set->vmap;
	    vmap_num = font_set->vmap_num;
	    for( ; vmap_num-- ; vmap++)
		if(vmap->font == font)
		    return True;
	}
    }
    return False;
}

static int
escapement_vertical(oc, font, is_xchar2b, text, length)
    XOC         oc;
    XFontStruct *font;
    Bool        is_xchar2b;
    XPointer    text;
    int         length;
{
    XChar2b	*buf2b;
    char	*buf;
    int		escapement = 0, i;

    if(is_xchar2b) {
	for(i = 0, buf2b = (XChar2b *) text ; i < length ; i++, buf2b++) {
	    if(is_rotate(oc, font) == True) {
		escapement += _XTextHeight16(font, buf2b, 1);
	    } else {
		escapement += (int) (font->max_bounds.ascent +
				     font->max_bounds.descent);
	    }
	}
    } else {
	for(i = 0, buf = (char *)text ; i < length && *buf ; i++, buf++) {
	    if(is_rotate(oc, font) == True) {
		escapement += _XTextHeight(font, buf, 1);
	    } else {
		escapement += (int) (font->max_bounds.ascent +
				     font->max_bounds.descent);
	    }
	}
    }
    return escapement;
}


extern FontData _XomGetFontDataFromFontSet();

static int
TextWidthWithFontSet(font_set, oc, text, length)
    FontSet	font_set;
    XOC		oc;
    XPointer    text;
    int         length;
{
    FontData		fd;
    XFontStruct		*font;
    unsigned char	*ptr = (unsigned char *)text;
    Bool        	is_xchar2b;
    int			ptr_len = length;
    int			escapement = 0, char_len = 0;

    if(font_set == (FontSet) NULL)
	return escapement;

    is_xchar2b = font_set->is_xchar2b;

    while(length > 0) {
	fd = _XomGetFontDataFromFontSet(font_set, ptr, length, &ptr_len,
					       is_xchar2b, FONTSCOPE);
	if(ptr_len <= 0)
	    break;

	/*
	 * First, see if the "Best Match" font for the FontSet was set.
	 * If it was, use that font.  If it was not set, then use the
	 * font defined by font_set->font_data[0] (which is what
	 * _XomGetFontDataFromFontSet() always seems to return for
	 * non-VW text).  Note that given the new algorithm in
	 * parse_fontname() and parse_fontdata(), fs->font will
	 * *always* contain good data.   We should probably remove
	 * the check for "fd->font", but we won't :-) -- jjw/pma (HP)
	 *
	 * Above comment and way this is done propagated from omText.c
	 * Note that fd->font is junk so using the result of the
	 * above call /needs/ to be ignored.
	 *
	 * Owen Taylor <otaylor@redhat.com>     12 Jul 2000
	 *
	 */

	if(fd == (FontData) NULL ||
	   (font = font_set->font) == (XFontStruct *) NULL) {

	    if((font = fd->font) == (XFontStruct *) NULL)
		break;
	}

	switch(oc->core.orientation) {
	  case XOMOrientation_LTR_TTB:
	  case XOMOrientation_RTL_TTB:
	    if (is_xchar2b) {
		char_len = ptr_len / sizeof(XChar2b);
		escapement += XTextWidth16(font, (XChar2b *)ptr, char_len);
	    } else {
		char_len = ptr_len;
		escapement += XTextWidth(font, (char *)ptr, char_len);
	    }
	    break;

	  case XOMOrientation_TTB_LTR:
	  case XOMOrientation_TTB_RTL:
	    if(font_set->font == font) {
		fd = _XomGetFontDataFromFontSet(font_set, ptr, length, &ptr_len,
						is_xchar2b, VMAP);
		if(ptr_len <= 0)
		    break;
		if(fd == (FontData) NULL ||
		   (font = fd->font) == (XFontStruct *) NULL)
		    break;

		if(is_codemap(oc, fd->font) == False) {
		    fd = _XomGetFontDataFromFontSet(font_set, ptr, length,
						    &ptr_len, is_xchar2b,
						    VROTATE);
		    if(ptr_len <= 0)
			break;
		    if(fd == (FontData) NULL ||
		       (font = fd->font) == (XFontStruct *) NULL)
			break;
		}
	    }

	    if(is_xchar2b)
		char_len = ptr_len / sizeof(XChar2b);
	    else
		char_len = ptr_len;
	    escapement += escapement_vertical(oc, font, is_xchar2b,
					      (XPointer) ptr, char_len);
	    break;

	  case XOMOrientation_Context:
	    /* not used? */
            break;
	}

	if(char_len <= 0)
	    break;

	length -= char_len;
	ptr += ptr_len;
    }

    return escapement;
}

/* For VW/UDC end */

static int
_XomGenericTextEscapement(oc, type, text, length)
    XOC oc;
    XOMTextType type;
    XPointer text;
    int length;
{
    XlcConv conv;
    XFontStruct *font;
    Bool is_xchar2b;
/* VW/UDC */
    XPointer args[3];
    FontSet font_set;
/* VW/UDC */
    XChar2b xchar2b_buf[BUFSIZ], *buf;
    int escapement = 0;
    int buf_len = 0, left = 0;

    conv = _XomInitConverter(oc, type);
    if (conv == NULL)
	return escapement;
    
    args[0] = (XPointer) &font;
    args[1] = (XPointer) &is_xchar2b;
    args[2] = (XPointer) &font_set;

    while (length > 0) {
	buf = xchar2b_buf;
	left = buf_len = BUFSIZ;

	if (_XomConvert(oc, conv, (XPointer *) &text, &length,
			(XPointer *) &buf, &left, args, 3) < 0)
	    break;
	buf_len -= left;

/* VW/UDC */
	escapement += TextWidthWithFontSet(font_set, oc,
					   (XPointer) xchar2b_buf, buf_len);
/* VW/UDC */
    }

    return escapement;
}

int
#if NeedFunctionPrototypes
_XmbGenericTextEscapement(XOC oc, _Xconst char *text, int length)
#else
_XmbGenericTextEscapement(oc, text, length)
    XOC oc;
    _Xconst char *text;
    int length;
#endif
{
    return _XomGenericTextEscapement(oc, XOMMultiByte, (XPointer) text, length);
}

int
#if NeedFunctionPrototypes
_XwcGenericTextEscapement(XOC oc, _Xconst wchar_t *text, int length)
#else
_XwcGenericTextEscapement(oc, text, length)
    XOC oc;
    _Xconst wchar_t *text;
    int length;
#endif
{
    return _XomGenericTextEscapement(oc, XOMWideChar, (XPointer) text, length);
}

int
#if NeedFunctionPrototypes
_Xutf8GenericTextEscapement(XOC oc, _Xconst char *text, int length)
#else
_Xutf8GenericTextEscapement(oc, text, length)
    XOC oc;
    _Xconst char *text;
    int length;
#endif
{
    return _XomGenericTextEscapement(oc, XOMUtf8String, (XPointer) text,
				     length);
}