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
|
/* Pango
* pango-impl-utils.h: Macros for get_type() functions
* Inspired by Jody Goldberg's gsf-impl-utils.h
*
* Copyright (C) 2003 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGO_IMPL_UTILS_H__
#define __PANGO_IMPL_UTILS_H__
#include <glib.h>
#include <glib-object.h>
#include <pango/pango.h>
G_BEGIN_DECLS
/* String interning for static strings */
#define I_(string) g_intern_static_string (string)
/* Some functions for handling PANGO_ATTR_SHAPE */
void _pango_shape_shape (const char *text,
gint n_chars,
PangoRectangle *shape_ink,
PangoRectangle *shape_logical,
PangoGlyphString *glyphs);
void _pango_shape_get_extents (gint n_chars,
PangoRectangle *shape_ink,
PangoRectangle *shape_logical,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
/* We define these functions static here because we don't want to add public API
* for them (if anything, it belongs to glib, but glib found it trivial enough
* not to add API for). At some point metrics calculations will be
* centralized and this mess can be minimized. Or so I hope.
*/
static inline G_GNUC_UNUSED int
pango_unichar_width (gunichar c)
{
return G_UNLIKELY (g_unichar_iszerowidth (c)) ? 0 :
G_UNLIKELY (g_unichar_iswide (c)) ? 2 : 1;
}
static G_GNUC_UNUSED glong
pango_utf8_strwidth (const gchar *p)
{
glong len = 0;
g_return_val_if_fail (p != NULL, 0);
while (*p)
{
len += pango_unichar_width (g_utf8_get_char (p));
p = g_utf8_next_char (p);
}
return len;
}
/* Glib's g_utf8_strlen() is broken and stops at embedded NUL's.
* Wrap it here. */
static G_GNUC_UNUSED glong
pango_utf8_strlen (const gchar *p, gssize max)
{
glong len = 0;
const gchar *start = p;
g_return_val_if_fail (p != NULL || max == 0, 0);
if (max <= 0)
return g_utf8_strlen (p, max);
p = g_utf8_next_char (p);
while (p - start < max)
{
++len;
p = g_utf8_next_char (p);
}
/* only do the last len increment if we got a complete
* char (don't count partial chars)
*/
if (p - start <= max)
++len;
return len;
}
/* To be made public at some point */
static G_GNUC_UNUSED void
pango_glyph_string_reverse_range (PangoGlyphString *glyphs,
int start, int end)
{
int i, j;
for (i = start, j = end - 1; i < j; i++, j--)
{
PangoGlyphInfo glyph_info;
gint log_cluster;
glyph_info = glyphs->glyphs[i];
glyphs->glyphs[i] = glyphs->glyphs[j];
glyphs->glyphs[j] = glyph_info;
log_cluster = glyphs->log_clusters[i];
glyphs->log_clusters[i] = glyphs->log_clusters[j];
glyphs->log_clusters[j] = log_cluster;
}
}
G_END_DECLS
#endif /* __PANGO_IMPL_UTILS_H__ */
|
