1 /*
2 * $Id$
3 *
4 * (c) 2004 by Kalle Wallin <kaw@linux.se>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
21 #include <stdlib.h>
22 #include <unistd.h>
23 #include <string.h>
24 #include <glib.h>
25 #include <ncurses.h>
27 #include "config.h"
28 #include "options.h"
29 #include "support.h"
30 #include "command.h"
31 #include "colors.h"
32 #include "list_window.h"
34 extern void screen_bell(void);
36 list_window_t *
37 list_window_init(WINDOW *w, int width, int height)
38 {
39 list_window_t *lw;
41 lw = g_malloc0(sizeof(list_window_t));
42 lw->w = w;
43 lw->cols = width;
44 lw->rows = height;
45 lw->clear = 1;
46 return lw;
47 }
49 list_window_t *
50 list_window_free(list_window_t *lw)
51 {
52 if( lw )
53 {
54 memset(lw, 0, sizeof(list_window_t));
55 g_free(lw);
56 }
57 return NULL;
58 }
60 void
61 list_window_reset(list_window_t *lw)
62 {
63 lw->selected = 0;
64 lw->xoffset = 0;
65 lw->start = 0;
66 lw->clear = 1;
67 }
69 void
70 list_window_check_selected(list_window_t *lw, int length)
71 {
72 while( lw->start && lw->start+lw->rows>length)
73 lw->start--;
75 if( lw->selected<0 )
76 lw->selected=0;
78 while( lw->selected<lw->start )
79 lw->selected++;
81 while( lw->selected>0 && length>0 && lw->selected>=length )
82 lw->selected--;
83 }
85 void
86 list_window_set_selected(list_window_t *lw, int n)
87 {
88 lw->selected=n;
89 }
91 void
92 list_window_next(list_window_t *lw, int length)
93 {
94 if( lw->selected < length-1 )
95 lw->selected++;
96 else if ( options.list_wrap )
97 lw->selected = 0;
98 }
100 void
101 list_window_previous(list_window_t *lw, int length)
102 {
103 if( lw->selected > 0 )
104 lw->selected--;
105 else if( options.list_wrap )
106 lw->selected = length-1;
107 }
109 void
110 list_window_right(list_window_t *lw, int length)
111 {
112 lw->xoffset++;
113 }
115 void
116 list_window_left(list_window_t *lw)
117 {
118 if( lw->xoffset > 0 )
119 lw->xoffset--;
120 }
122 void
123 list_window_first(list_window_t *lw)
124 {
125 lw->xoffset = 0;
126 lw->selected = 0;
127 }
129 void
130 list_window_last(list_window_t *lw, int length)
131 {
132 lw->xoffset = 0;
133 lw->selected = length-1;
134 }
136 void
137 list_window_next_page(list_window_t *lw, int length)
138 {
139 int step = lw->rows-1;
140 if( step<= 0 )
141 return;
142 if( lw->selected+step < length-1 )
143 lw->selected+=step;
144 else
145 return list_window_last(lw,length);
146 }
148 void
149 list_window_previous_page(list_window_t *lw)
150 {
151 int step = lw->rows-1;
152 if( step<= 0 )
153 return;
154 if( lw->selected-step > 0 )
155 lw->selected-=step;
156 else
157 list_window_first(lw);
158 }
161 void
162 list_window_paint(list_window_t *lw,
163 list_window_callback_fn_t callback,
164 void *callback_data)
165 {
166 int i;
167 int fill = options.wide_cursor;
169 if( lw->flags & LW_HIDE_CURSOR )
170 {
171 lw->selected = -1;
172 }
173 else
174 {
175 while( lw->selected < lw->start )
176 {
177 lw->start--;
178 lw->clear=1;
179 }
180 while( lw->selected >= lw->start+lw->rows )
181 {
182 lw->start++;
183 lw->clear=1;
184 }
185 }
187 for(i=0; i<lw->rows; i++)
188 {
189 int highlight = 0;
190 char *label;
192 label = (callback) (lw->start+i, &highlight, callback_data);
193 wmove(lw->w, i, 0);
194 if( lw->clear && (!fill || !label) )
195 wclrtoeol(lw->w);
196 if( label )
197 {
198 int selected = lw->start+i == lw->selected;
199 size_t len = strlen(label);
201 if( highlight )
202 colors_use(lw->w, COLOR_LIST_BOLD);
203 else
204 colors_use(lw->w, COLOR_LIST);
206 if( selected )
207 wattron(lw->w, A_REVERSE);
209 waddnstr(lw->w, label, lw->cols);
210 if( fill && len<lw->cols )
211 mvwhline(lw->w, i, len, ' ', lw->cols-len);
213 if( selected )
214 wattroff(lw->w, A_REVERSE);
215 }
217 }
218 lw->clear=0;
219 }
222 int
223 list_window_find(list_window_t *lw,
224 list_window_callback_fn_t callback,
225 void *callback_data,
226 char *str,
227 int wrap)
228 {
229 int h;
230 int i = lw->selected+1;
231 char *label;
233 while( wrap || i==lw->selected+1 )
234 {
235 while( (label=(callback) (i,&h,callback_data)) )
236 {
237 if( str && label && strcasestr(label, str) )
238 {
239 lw->selected = i;
240 return 0;
241 }
242 if( wrap && i==lw->selected )
243 return 1;
244 i++;
245 }
246 if( wrap )
247 {
248 i=0; /* first item */
249 screen_bell();
250 }
251 }
252 return 1;
253 }
256 int
257 list_window_rfind(list_window_t *lw,
258 list_window_callback_fn_t callback,
259 void *callback_data,
260 char *str,
261 int wrap,
262 int rows)
263 {
264 int h;
265 int i = lw->selected-1;
266 char *label;
268 while( wrap || i==lw->selected-1 )
269 {
270 while( i>=0 && (label=(callback) (i,&h,callback_data)) )
271 {
272 if( str && label && strcasestr(label, str) )
273 {
274 lw->selected = i;
275 return 0;
276 }
277 if( wrap && i==lw->selected )
278 return 1;
279 i--;
280 }
281 if( wrap )
282 {
283 i=rows-1; /* last item */
284 screen_bell();
285 }
286 }
287 return 1;
288 }
291 /* perform basic list window commands (movement) */
292 int
293 list_window_cmd(list_window_t *lw, int rows, command_t cmd)
294 {
295 switch(cmd)
296 {
297 case CMD_LIST_PREVIOUS:
298 list_window_previous(lw, rows);
299 lw->repaint=1;
300 break;
301 case CMD_LIST_NEXT:
302 list_window_next(lw, rows);
303 lw->repaint=1;
304 break;
305 case CMD_LIST_FIRST:
306 list_window_first(lw);
307 lw->repaint = 1;
308 break;
309 case CMD_LIST_LAST:
310 list_window_last(lw, rows);
311 lw->repaint = 1;
312 break;
313 case CMD_LIST_NEXT_PAGE:
314 list_window_next_page(lw, rows);
315 lw->repaint = 1;
316 break;
317 case CMD_LIST_PREVIOUS_PAGE:
318 list_window_previous_page(lw);
319 lw->repaint = 1;
320 break;
321 default:
322 return 0;
323 }
324 return 1;
325 }