2b5fe8c607918bbdf3d4e4d3fdabd2f467f101e5
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_first(list_window_t *lw)
111 {
112 lw->xoffset = 0;
113 lw->selected = 0;
114 }
116 void
117 list_window_last(list_window_t *lw, int length)
118 {
119 lw->xoffset = 0;
120 lw->selected = length-1;
121 }
123 void
124 list_window_next_page(list_window_t *lw, int length)
125 {
126 int step = lw->rows-1;
127 if( step<= 0 )
128 return;
129 if( lw->selected+step < length-1 )
130 lw->selected+=step;
131 else
132 return list_window_last(lw,length);
133 }
135 void
136 list_window_previous_page(list_window_t *lw)
137 {
138 int step = lw->rows-1;
139 if( step<= 0 )
140 return;
141 if( lw->selected-step > 0 )
142 lw->selected-=step;
143 else
144 list_window_first(lw);
145 }
148 void
149 list_window_paint(list_window_t *lw,
150 list_window_callback_fn_t callback,
151 void *callback_data)
152 {
153 int i;
154 int fill = options.wide_cursor;
155 int show_cursor = !(lw->flags & LW_HIDE_CURSOR);
157 if( show_cursor )
158 {
159 while( lw->selected < lw->start )
160 {
161 lw->start--;
162 lw->clear=1;
163 }
164 while( lw->selected >= lw->start+lw->rows )
165 {
166 lw->start++;
167 lw->clear=1;
168 }
169 }
171 for(i=0; i<lw->rows; i++)
172 {
173 int highlight = 0;
174 char *label;
176 label = (callback) (lw->start+i, &highlight, callback_data);
177 wmove(lw->w, i, 0);
178 if( lw->clear && (!fill || !label) )
179 wclrtoeol(lw->w);
180 if( label )
181 {
182 int selected = lw->start+i == lw->selected;
183 size_t len = my_strlen(label);
185 if( highlight )
186 colors_use(lw->w, COLOR_LIST_BOLD);
187 else
188 colors_use(lw->w, COLOR_LIST);
190 if( show_cursor && selected )
191 wattron(lw->w, A_REVERSE);
193 //waddnstr(lw->w, label, lw->cols);
194 waddstr(lw->w, label);
195 if( fill && len<lw->cols )
196 whline(lw->w, ' ', lw->cols-len);
198 if( selected )
199 wattroff(lw->w, A_REVERSE);
200 }
202 }
203 lw->clear=0;
204 }
207 int
208 list_window_find(list_window_t *lw,
209 list_window_callback_fn_t callback,
210 void *callback_data,
211 char *str,
212 int wrap)
213 {
214 int h;
215 int i = lw->selected+1;
216 char *label;
218 while( wrap || i==lw->selected+1 )
219 {
220 while( (label=(callback) (i,&h,callback_data)) )
221 {
222 if( str && label && strcasestr(label, str) )
223 {
224 lw->selected = i;
225 return 0;
226 }
227 if( wrap && i==lw->selected )
228 return 1;
229 i++;
230 }
231 if( wrap )
232 {
233 if ( i==0 ) /* empty list */
234 return 1;
235 i=0; /* first item */
236 screen_bell();
237 }
238 }
239 return 1;
240 }
243 int
244 list_window_rfind(list_window_t *lw,
245 list_window_callback_fn_t callback,
246 void *callback_data,
247 char *str,
248 int wrap,
249 int rows)
250 {
251 int h;
252 int i = lw->selected-1;
253 char *label;
255 if ( rows == 0 )
256 return 1;
258 while( wrap || i==lw->selected-1 )
259 {
260 while( i>=0 && (label=(callback) (i,&h,callback_data)) )
261 {
262 if( str && label && strcasestr(label, str) )
263 {
264 lw->selected = i;
265 return 0;
266 }
267 if( wrap && i==lw->selected )
268 return 1;
269 i--;
270 }
271 if( wrap )
272 {
273 i=rows-1; /* last item */
274 screen_bell();
275 }
276 }
277 return 1;
278 }
281 /* perform basic list window commands (movement) */
282 int
283 list_window_cmd(list_window_t *lw, int rows, command_t cmd)
284 {
285 switch(cmd)
286 {
287 case CMD_LIST_PREVIOUS:
288 list_window_previous(lw, rows);
289 lw->repaint=1;
290 break;
291 case CMD_LIST_NEXT:
292 list_window_next(lw, rows);
293 lw->repaint=1;
294 break;
295 case CMD_LIST_FIRST:
296 list_window_first(lw);
297 lw->repaint = 1;
298 break;
299 case CMD_LIST_LAST:
300 list_window_last(lw, rows);
301 lw->repaint = 1;
302 break;
303 case CMD_LIST_NEXT_PAGE:
304 list_window_next_page(lw, rows);
305 lw->repaint = 1;
306 break;
307 case CMD_LIST_PREVIOUS_PAGE:
308 list_window_previous_page(lw);
309 lw->repaint = 1;
310 break;
311 default:
312 return 0;
313 }
314 return 1;
315 }
321 list_window_state_t *
322 list_window_init_state(void)
323 {
324 return g_malloc0(sizeof(list_window_state_t));
325 }
327 list_window_state_t *
328 list_window_free_state(list_window_state_t *state)
329 {
330 if( state )
331 {
332 if( state->list )
333 {
334 GList *list = state->list;
335 while( list )
336 {
337 g_free(list->data);
338 list->data = NULL;
339 list = list->next;
340 }
341 g_list_free(state->list);
342 state->list = NULL;
343 }
344 g_free(state);
345 }
346 return NULL;
347 }
349 void
350 list_window_push_state(list_window_state_t *state, list_window_t *lw)
351 {
352 if( state )
353 {
354 list_window_t *tmp = g_malloc(sizeof(list_window_t));
355 memcpy(tmp, lw, sizeof(list_window_t));
356 state->list = g_list_prepend(state->list, (gpointer) tmp);
357 list_window_reset(lw);
358 }
359 }
361 bool
362 list_window_pop_state(list_window_state_t *state, list_window_t *lw)
363 {
364 if( state && state->list )
365 {
366 list_window_t *tmp = state->list->data;
368 memcpy(lw, tmp, sizeof(list_window_t));
369 g_free(tmp);
370 state->list->data = NULL;
371 state->list = g_list_delete_link(state->list, state->list);
372 }
374 // return TRUE if there are still states in the list
375 return (state && state->list) ? TRUE : FALSE;
376 }