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
|
/* $Id: widget.c,v 1.20 2005/11/06 09:17:20 reinelt Exp $
*
* generic widget handling
*
* Copyright (C) 2003, 2004 Michael Reinelt <reinelt@eunet.at>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: widget.c,v $
* Revision 1.20 2005/11/06 09:17:20 reinelt
* re-use icons (thanks to Jesus de Santos Garcia)
*
* Revision 1.19 2005/05/08 04:32:45 reinelt
* CodingStyle added and applied
*
* Revision 1.18 2005/01/18 06:30:24 reinelt
* added (C) to all copyright statements
*
* Revision 1.17 2004/06/26 12:05:00 reinelt
*
* uh-oh... the last CVS log message messed up things a lot...
*
* Revision 1.16 2004/06/26 09:27:21 reinelt
*
* added '-W' to CFLAGS
* changed all C++ comments to C ones
* cleaned up a lot of signed/unsigned mistakes
*
* Revision 1.15 2004/06/20 10:09:56 reinelt
*
* 'const'ified the whole source
*
* Revision 1.14 2004/05/26 11:37:36 reinelt
*
* Curses driver ported.
*
* Revision 1.13 2004/03/03 03:47:04 reinelt
* big patch from Martin Hejl:
* - use qprintf() where appropriate
* - save CPU cycles on gettimeofday()
* - add quit() functions to free allocated memory
* - fixed lots of memory leaks
*
* Revision 1.12 2004/02/18 06:39:20 reinelt
* T6963 driver for graphic displays finished
*
* Revision 1.11 2004/01/30 20:57:56 reinelt
* HD44780 patch from Martin Hejl
* dmalloc integrated
*
* Revision 1.10 2004/01/29 04:40:03 reinelt
* every .c file includes "config.h" now
*
* Revision 1.9 2004/01/23 04:53:57 reinelt
* icon widget added (not finished yet!)
*
* Revision 1.8 2004/01/14 11:33:00 reinelt
* new plugin 'uname' which does what it's called
* text widget nearly finished
* first results displayed on MatrixOrbital
*
* Revision 1.7 2004/01/13 08:18:20 reinelt
* timer queues added
* liblcd4linux deactivated turing transformation to new layout
*
* Revision 1.6 2004/01/11 18:26:02 reinelt
* further widget and layout processing
*
* Revision 1.5 2004/01/11 09:26:15 reinelt
* layout starts to exist...
*
* Revision 1.4 2004/01/10 20:22:33 reinelt
* added new function 'cfg_list()' (not finished yet)
* added layout.c (will replace processor.c someday)
* added widget_text.c (will be the first and most important widget)
* modified lcd4linux.c so that old-style configs should work, too
*
* Revision 1.3 2004/01/10 17:34:40 reinelt
* further matrixOrbital changes
* widgets initialized
*
* Revision 1.2 2003/10/05 17:58:50 reinelt
* libtool junk; copyright messages cleaned up
*
* Revision 1.1 2003/09/19 03:51:29 reinelt
* minor fixes, widget.c added
*
*/
/*
* exported functions:
*
* int widget_junk(void)
* does something
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "debug.h"
#include "cfg.h"
#include "widget.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
/* we use a static array of widgets and not realloc() */
#define MAX_WIDGETS 256
static WIDGET_CLASS *Classes = NULL;
static int nClasses = 0;
static WIDGET *Widgets = NULL;
static int nWidgets = 0;
static int widget_added = 0;
int widget_register(WIDGET_CLASS * widget)
{
int i;
/* sanity check: disallow widget registering after at least one */
/* widget has been added, because we use realloc here, and there may */
/* be pointers to the old memory area */
if (widget_added) {
error("internal error: register_widget(%s) after add_widget()", widget->name);
return -1;
}
for (i = 0; i < nClasses; i++) {
if (strcasecmp(widget->name, Classes[i].name) == 0) {
error("internal error: widget '%s' already exists!", widget->name);
return -1;
}
}
nClasses++;
Classes = realloc(Classes, nClasses * sizeof(WIDGET_CLASS));
Classes[nClasses - 1] = *widget;
return 0;
}
void widget_unregister(void)
{
int i;
for (i = 0; i < nWidgets; i++) {
Widgets[i].class->quit(&(Widgets[i]));
if (Widgets[i].name)
free (Widgets[i].name);
}
free(Widgets);
free(Classes);
nWidgets = 0;
nClasses = 0;
}
int widget_add(const char *name, const int row, const int col)
{
int i;
char *section;
char *class;
WIDGET_CLASS *Class;
WIDGET *Widget;
WIDGET *Parent;
/* prepare config section */
/* strlen("Widget:")=7 */
section = malloc(strlen(name) + 8);
strcpy(section, "Widget:");
strcat(section, name);
/* get widget class */
class = cfg_get(section, "class", NULL);
if (class == NULL || *class == '\0') {
error("error: widget '%s' has no class!", name);
if (class)
free(class);
return -1;
}
free(section);
/* lookup widget class */
Class = NULL;
for (i = 0; i < nClasses; i++) {
if (strcasecmp(class, Classes[i].name) == 0) {
Class = &(Classes[i]);
break;
}
}
if (i == nClasses) {
error("widget '%s': class '%s' not supported", name, class);
if (class)
free(class);
return -1;
}
if (class)
free(class);
/* do NOT use realloc here because there may be pointers to the old */
/* memory area, which would point to nowhere if realloc moves the area */
if (Widgets == NULL) {
Widgets = malloc(MAX_WIDGETS * sizeof(WIDGET));
if (Widgets == NULL) {
error("internal error: allocation of widget buffer failed: %s", strerror(errno));
return -1;
}
}
/* another sanity check */
if (nWidgets >= MAX_WIDGETS) {
error("internal error: widget buffer full!");
return -1;
}
/* look up parent widget (widget with the same name) */
Parent = NULL;
for (i = 0; i < nWidgets; i++) {
if (strcmp(name, Widgets[i].name) == 0) {
Parent = &(Widgets[i]);
break;
}
}
Widget = &(Widgets[nWidgets]);
nWidgets++;
Widget->name = strdup(name);
Widget->class = Class;
Widget->parent = Parent;
Widget->row = row;
Widget->col = col;
if (Class->init != NULL) {
Class->init(Widget);
}
return 0;
}
|
