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
|
/* Pango
* testiter.c: Test pangolayoutiter.c
*
* Copyright (C) 2005 Amit Aronovitch
* Copyright (C) 2005 Red Hat, Inc
*
* 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.
*/
#undef G_DISABLE_ASSERT
#undef G_LOG_DOMAIN
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <pango/pangocairo.h>
#undef VERBOSE
static void verbose (const char *format, ...) G_GNUC_PRINTF (1, 2);
static void
verbose (const char *format, ...)
{
#ifdef VERBOSE
va_list vap;
va_start (vap, format);
vfprintf (stderr, format, vap);
va_end (vap);
#endif
}
#define LAYOUT_WIDTH (80 * PANGO_SCALE)
/* Note: The test expects that any newline sequence is of length 1
* use \n (not \r\n) in the test texts.
* I think the iterator itself should support \r\n without trouble,
* but there are comments in layout-iter.c suggesting otherwise.
*/
const char *test_texts[] =
{
/* English with embedded RTL runs (from ancient-hebrew.org) */
"The Hebrew word \xd7\x90\xd7\x93\xd7\x9d\xd7\x94 (adamah) is the feminine form of \xd7\x90\xd7\x93\xd7\x9d meaning \"ground\"\n",
/* Arabic, with vowel marks (from Sura Al Fatiha) */
"\xd8\xa8\xd9\x90\xd8\xb3\xd9\x92\xd9\x85\xd9\x90 \xd8\xa7\xd9\x84\xd9\x84\xd9\x91\xd9\x87\xd9\x90 \xd8\xa7\xd9\x84\xd8\xb1\xd9\x91\xd9\x8e\xd8\xad\xd9\x92\xd9\x85\xd9\x80\xd9\x8e\xd9\x86\xd9\x90 \xd8\xa7\xd9\x84\xd8\xb1\xd9\x91\xd9\x8e\xd8\xad\xd9\x90\xd9\x8a\xd9\x85\xd9\x90\n\xd8\xa7\xd9\x84\xd9\x92\xd8\xad\xd9\x8e\xd9\x85\xd9\x92\xd8\xaf\xd9\x8f \xd9\x84\xd9\x84\xd9\x91\xd9\x87\xd9\x90 \xd8\xb1\xd9\x8e\xd8\xa8\xd9\x91\xd9\x90 \xd8\xa7\xd9\x84\xd9\x92\xd8\xb9\xd9\x8e\xd8\xa7\xd9\x84\xd9\x8e\xd9\x85\xd9\x90\xd9\x8a\xd9\x86\xd9\x8e\n",
/* Arabic, with embedded LTR runs (from a Linux guide) */
"\xd8\xa7\xd9\x84\xd9\x85\xd8\xaa\xd8\xba\xd9\x8a\xd8\xb1 LC_ALL \xd9\x8a\xd8\xba\xd9\x8a\xd9\x8a\xd8\xb1 \xd9\x83\xd9\x84 \xd8\xa7\xd9\x84\xd9\x85\xd8\xaa\xd8\xba\xd9\x8a\xd8\xb1\xd8\xa7\xd8\xaa \xd8\xa7\xd9\x84\xd8\xaa\xd9\x8a \xd8\xaa\xd8\xa8\xd8\xaf\xd8\xa3 \xd8\xa8\xd8\xa7\xd9\x84\xd8\xb1\xd9\x85\xd8\xb2 LC.",
/* Hebrew, with vowel marks (from Genesis) */
"\xd7\x91\xd6\xbc\xd6\xb0\xd7\xa8\xd6\xb5\xd7\x90\xd7\xa9\xd7\x81\xd6\xb4\xd7\x99\xd7\xaa, \xd7\x91\xd6\xbc\xd6\xb8\xd7\xa8\xd6\xb8\xd7\x90 \xd7\x90\xd6\xb1\xd7\x9c\xd6\xb9\xd7\x94\xd6\xb4\xd7\x99\xd7\x9d, \xd7\x90\xd6\xb5\xd7\xaa \xd7\x94\xd6\xb7\xd7\xa9\xd6\xbc\xd7\x81\xd6\xb8\xd7\x9e\xd6\xb7\xd7\x99\xd6\xb4\xd7\x9d, \xd7\x95\xd6\xb0\xd7\x90\xd6\xb5\xd7\xaa \xd7\x94\xd6\xb8\xd7\x90\xd6\xb8\xd7\xa8\xd6\xb6\xd7\xa5",
/* Hebrew, with embedded LTR runs (from a Linux guide) */
"\xd7\x94\xd7\xa7\xd7\x9c\xd7\x93\xd7\x94 \xd7\xa2\xd7\x9c \xd7\xa9\xd7\xa0\xd7\x99 \xd7\x94 SHIFT\xd7\x99\xd7\x9d (\xd7\x99\xd7\x9e\xd7\x99\xd7\x9f \xd7\x95\xd7\xa9\xd7\x9e\xd7\x90\xd7\x9c \xd7\x91\xd7\x99\xd7\x97\xd7\x93) \xd7\x90\xd7\x9e\xd7\x95\xd7\xa8\xd7\x99\xd7\x9d \xd7\x9c\xd7\x94\xd7\x93\xd7\x9c\xd7\x99\xd7\xa7 \xd7\x90\xd7\xaa \xd7\xa0\xd7\x95\xd7\xa8\xd7\xaa \xd7\x94 Scroll Lock , \xd7\x95\xd7\x9c\xd7\x94\xd7\xa2\xd7\x91\xd7\x99\xd7\xa8 \xd7\x90\xd7\x95\xd7\xaa\xd7\xa0\xd7\x95 \xd7\x9c\xd7\x9e\xd7\xa6\xd7\x91 \xd7\x9b\xd7\xaa\xd7\x99\xd7\x91\xd7\x94 \xd7\x91\xd7\xa2\xd7\x91\xd7\xa8\xd7\x99\xd7\xaa.",
/* Different line terminators */
"AAAA\nBBBB\nCCCC\n",
"DDDD\rEEEE\rFFFF\r",
"GGGG\r\nHHHH\r\nIIII\r\n",
NULL
};
static void
iter_char_test (PangoLayout *layout)
{
PangoRectangle extents, run_extents;
PangoLayoutIter *iter;
PangoLayoutRun *run;
int num_chars;
int i, index, offset;
int leading_x, trailing_x, x0, x1;
gboolean iter_next_ok, rtl;
const char *text, *ptr;
text = pango_layout_get_text (layout);
num_chars = g_utf8_strlen (text, -1);
iter = pango_layout_get_iter (layout);
iter_next_ok = TRUE;
for (i = 0 ; i < num_chars; ++i)
{
gchar *char_str;
g_assert (iter_next_ok);
index = pango_layout_iter_get_index (iter);
ptr = text + index;
char_str = g_strndup (ptr, g_utf8_next_char (ptr) - ptr);
verbose ("i=%d (visual), index = %d '%s':\n",
i, index, char_str);
g_free (char_str);
pango_layout_iter_get_char_extents (iter, &extents);
verbose (" char extents: x=%d,y=%d w=%d,h=%d\n",
extents.x, extents.y,
extents.width, extents.height);
run = pango_layout_iter_get_run (iter);
if (run)
{
/* Get needed data for the GlyphString */
pango_layout_iter_get_run_extents(iter, NULL, &run_extents);
offset = run->item->offset;
rtl = run->item->analysis.level%2;
verbose (" (current run: offset=%d,x=%d,len=%d,rtl=%d)\n",
offset, run_extents.x, run->item->length, rtl);
/* Calculate expected x result using index_to_x */
pango_glyph_string_index_to_x (run->glyphs,
(char *)(text + offset), run->item->length,
&run->item->analysis,
index - offset, FALSE, &leading_x);
pango_glyph_string_index_to_x (run->glyphs,
(char *)(text + offset), run->item->length,
&run->item->analysis,
index - offset, TRUE, &trailing_x);
x0 = run_extents.x + MIN (leading_x, trailing_x);
x1 = run_extents.x + MAX (leading_x, trailing_x);
verbose (" (index_to_x ind=%d: expected x=%d, width=%d)\n",
index - offset, x0, x1 - x0);
g_assert (extents.x == x0);
g_assert (extents.width == x1 - x0);
}
else
{
/* We're on a line terminator */
}
iter_next_ok = pango_layout_iter_next_char (iter);
verbose ("more to go? %d\n", iter_next_ok);
}
/* There should be one character position iterator for each character in the
* input string */
g_assert (!iter_next_ok);
pango_layout_iter_free (iter);
}
/* char iteration test:
* - Total num of iterations match number of chars
* - GlyphString's index_to_x positions match those returned by the Iter
*/
static void
iter_cluster_test (PangoLayout *layout)
{
PangoRectangle extents;
PangoLayoutIter *iter;
int index;
gboolean iter_next_ok;
PangoLayoutLine *last_line = NULL;
int expected_next_x = 0;
iter = pango_layout_get_iter (layout);
iter_next_ok = TRUE;
while (iter_next_ok)
{
PangoLayoutLine *line = pango_layout_iter_get_line (iter);
/* Every cluster is part of a run */
g_assert (pango_layout_iter_get_run (iter));
index = pango_layout_iter_get_index (iter);
pango_layout_iter_get_cluster_extents (iter, NULL, &extents);
iter_next_ok = pango_layout_iter_next_cluster (iter);
verbose ("index = %d:\n", index);
verbose (" cluster extents: x=%d,y=%d w=%d,h=%d\n",
extents.x, extents.y,
extents.width, extents.height);
verbose ("more to go? %d\n", iter_next_ok);
/* All the clusters on a line should be next to each other and occupy
* the entire line. They advance linearly from left to right */
g_assert (extents.width >= 0);
if (last_line == line)
g_assert (extents.x == expected_next_x);
expected_next_x = extents.x + extents.width;
last_line = line;
}
g_assert (!iter_next_ok);
pango_layout_iter_free (iter);
}
int
main (int argc, char *argv[])
{
const char **ptext;
PangoFontMap *fontmap;
PangoContext *context;
PangoLayout *layout;
g_setenv ("PANGO_RC_FILE", "./pangorc", TRUE);
fontmap = pango_cairo_font_map_get_default ();
context = pango_font_map_create_context (fontmap);
layout = pango_layout_new (context);
pango_layout_set_width (layout, LAYOUT_WIDTH);
for (ptext = test_texts; *ptext != NULL; ++ptext)
{
verbose ("--------- checking next text ----------\n");
verbose (" <%s>\n", *ptext);
verbose ( "len=%ld, bytes=%ld\n",
(long)g_utf8_strlen (*ptext, -1), (long)strlen (*ptext));
pango_layout_set_text (layout, *ptext, -1);
iter_char_test (layout);
iter_cluster_test (layout);
}
g_object_unref (layout);
return 0;
}
|
