omTextExt.c revision b4ee4795 
1/*
2 * Copyright 1992, 1993 by TOSHIBA Corp.
3 *
4 * Permission to use, copy, modify, and distribute this software and its
5 * documentation for any purpose and without fee is hereby granted, provided
6 * that the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of TOSHIBA not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission. TOSHIBA make no representations about the
11 * suitability of this software for any purpose.  It is provided "as is"
12 * without express or implied warranty.
13 *
14 * TOSHIBA DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
15 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
16 * TOSHIBA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
18 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
19 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
20 * SOFTWARE.
21 *
22 * Author: Katsuhisa Yano	TOSHIBA Corp.
23 *			   	mopi@osa.ilab.toshiba.co.jp
24 */
25
26#ifdef HAVE_CONFIG_H
27#include <config.h>
28#endif
29#include "Xlibint.h"
30#include "XomGeneric.h"
31#include <stdio.h>
32
33int
34_XomGenericTextExtents(
35    XOC oc,
36    XOMTextType type,
37    XPointer text,
38    int length,
39    XRectangle *overall_ink,
40    XRectangle *overall_logical)
41{
42    XlcConv conv;
43    XFontStruct *font;
44    Bool is_xchar2b;
45    XPointer args[2];
46    XChar2b xchar2b_buf[BUFSIZ], *buf;
47    int direction, logical_ascent, logical_descent, tmp_ascent, tmp_descent;
48    XCharStruct overall, tmp_overall;
49    int buf_len, left;
50    Bool first = True;
51
52    conv = _XomInitConverter(oc, type);
53    if (conv == NULL)
54	return 0;
55
56    bzero((char *) &overall, sizeof(XCharStruct));
57    logical_ascent = logical_descent = 0;
58
59    args[0] = (XPointer) &font;
60    args[1] = (XPointer) &is_xchar2b;
61
62    while (length > 0) {
63	buf = xchar2b_buf;
64	left = buf_len = BUFSIZ;
65
66	if (_XomConvert(oc, conv, (XPointer *) &text, &length,
67			(XPointer *) &buf, &left, args, 2) < 0)
68	    break;
69	buf_len -= left;
70
71	if (is_xchar2b)
72	    XTextExtents16(font, xchar2b_buf, buf_len, &direction,
73			   &tmp_ascent, &tmp_descent, &tmp_overall);
74	else
75	    XTextExtents(font, (char *) xchar2b_buf, buf_len, &direction,
76			 &tmp_ascent, &tmp_descent, &tmp_overall);
77
78	if (first) {	/* initialize overall */
79	    overall = tmp_overall;
80	    logical_ascent = tmp_ascent;
81	    logical_descent = tmp_descent;
82	    first = False;
83	} else {
84	    overall.lbearing = min(overall.lbearing,
85				   overall.width + tmp_overall.lbearing);
86	    overall.rbearing = max(overall.rbearing,
87				   overall.width + tmp_overall.rbearing);
88	    overall.ascent = max(overall.ascent, tmp_overall.ascent);
89	    overall.descent = max(overall.descent, tmp_overall.descent);
90	    overall.width += tmp_overall.width;
91	    logical_ascent = max(logical_ascent, tmp_ascent);
92	    logical_descent = max(logical_descent, tmp_descent);
93	}
94    }
95
96    if (overall_ink) {
97	overall_ink->x = overall.lbearing;
98	overall_ink->y = -(overall.ascent);
99	overall_ink->width = overall.rbearing - overall.lbearing;
100	overall_ink->height = overall.ascent + overall.descent;
101    }
102
103    if (overall_logical) {
104	overall_logical->x = 0;
105        overall_logical->y = -(logical_ascent);
106	overall_logical->width = overall.width;
107        overall_logical->height = logical_ascent + logical_descent;
108    }
109
110    return overall.width;
111}
112
113int
114_XmbGenericTextExtents(XOC oc, _Xconst char *text, int length,
115		       XRectangle *overall_ink, XRectangle *overall_logical)
116{
117    return _XomGenericTextExtents(oc, XOMMultiByte, (XPointer) text, length,
118				  overall_ink, overall_logical);
119}
120
121int
122_XwcGenericTextExtents(XOC oc, _Xconst wchar_t *text, int length,
123		       XRectangle *overall_ink, XRectangle *overall_logical)
124{
125    return _XomGenericTextExtents(oc, XOMWideChar, (XPointer) text, length,
126				  overall_ink, overall_logical);
127}
128
129int
130_Xutf8GenericTextExtents(XOC oc, _Xconst char *text, int length,
131			 XRectangle *overall_ink, XRectangle *overall_logical)
132{
133    return _XomGenericTextExtents(oc, XOMUtf8String, (XPointer) text, length,
134				  overall_ink, overall_logical);
135}
136