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 memset(lw, 0, sizeof(list_window_t));
54 g_free(lw);
55 }
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 while (lw->selected < lw->start) {
159 lw->start--;
160 lw->clear=1;
161 }
163 while (lw->selected >= lw->start+lw->rows) {
164 lw->start++;
165 lw->clear=1;
166 }
167 }
169 for (i = 0; i < lw->rows; i++) {
170 int highlight = 0;
171 const char *label;
173 label = callback(lw->start + i, &highlight, callback_data);
174 wmove(lw->w, i, 0);
175 if( lw->clear && (!fill || !label) )
176 wclrtoeol(lw->w);
178 if (label) {
179 int selected = lw->start + i == lw->selected;
180 size_t len = my_strlen(label);
182 if( highlight )
183 colors_use(lw->w, COLOR_LIST_BOLD);
184 else
185 colors_use(lw->w, COLOR_LIST);
187 if( show_cursor && selected )
188 wattron(lw->w, A_REVERSE);
190 //waddnstr(lw->w, label, lw->cols);
191 waddstr(lw->w, label);
192 if( fill && len<lw->cols )
193 whline(lw->w, ' ', lw->cols-len);
195 if( selected )
196 wattroff(lw->w, A_REVERSE);
197 }
198 }
200 lw->clear=0;
201 }
203 int
204 list_window_find(list_window_t *lw,
205 list_window_callback_fn_t callback,
206 void *callback_data,
207 const char *str,
208 int wrap)
209 {
210 int h;
211 int i = lw->selected + 1;
212 const char *label;
214 while (wrap || i == lw->selected + 1) {
215 while ((label = callback(i,&h,callback_data))) {
216 if (str && label && strcasestr(label, str)) {
217 lw->selected = i;
218 return 0;
219 }
220 if (wrap && i == lw->selected)
221 return 1;
222 i++;
223 }
224 if (wrap) {
225 if (i == 0) /* empty list */
226 return 1;
227 i=0; /* first item */
228 screen_bell();
229 }
230 }
232 return 1;
233 }
235 int
236 list_window_rfind(list_window_t *lw,
237 list_window_callback_fn_t callback,
238 void *callback_data,
239 const char *str,
240 int wrap,
241 int rows)
242 {
243 int h;
244 int i = lw->selected-1;
245 const char *label;
247 if (rows == 0)
248 return 1;
250 while (wrap || i == lw->selected - 1) {
251 while (i >= 0 && (label = callback(i,&h,callback_data))) {
252 if( str && label && strcasestr(label, str) ) {
253 lw->selected = i;
254 return 0;
255 }
256 if (wrap && i == lw->selected)
257 return 1;
258 i--;
259 }
260 if (wrap) {
261 i = rows - 1; /* last item */
262 screen_bell();
263 }
264 }
265 return 1;
266 }
268 /* perform basic list window commands (movement) */
269 int
270 list_window_cmd(list_window_t *lw, int rows, command_t cmd)
271 {
272 switch (cmd) {
273 case CMD_LIST_PREVIOUS:
274 list_window_previous(lw, rows);
275 lw->repaint=1;
276 break;
277 case CMD_LIST_NEXT:
278 list_window_next(lw, rows);
279 lw->repaint=1;
280 break;
281 case CMD_LIST_FIRST:
282 list_window_first(lw);
283 lw->repaint = 1;
284 break;
285 case CMD_LIST_LAST:
286 list_window_last(lw, rows);
287 lw->repaint = 1;
288 break;
289 case CMD_LIST_NEXT_PAGE:
290 list_window_next_page(lw, rows);
291 lw->repaint = 1;
292 break;
293 case CMD_LIST_PREVIOUS_PAGE:
294 list_window_previous_page(lw);
295 lw->repaint = 1;
296 break;
297 default:
298 return 0;
299 }
301 return 1;
302 }
304 list_window_state_t *
305 list_window_init_state(void)
306 {
307 return g_malloc0(sizeof(list_window_state_t));
308 }
310 list_window_state_t *
311 list_window_free_state(list_window_state_t *state)
312 {
313 if( state )
314 {
315 if( state->list )
316 {
317 GList *list = state->list;
318 while( list )
319 {
320 g_free(list->data);
321 list->data = NULL;
322 list = list->next;
323 }
324 g_list_free(state->list);
325 state->list = NULL;
326 }
327 g_free(state);
328 }
329 return NULL;
330 }
332 void
333 list_window_push_state(list_window_state_t *state, list_window_t *lw)
334 {
335 if( state )
336 {
337 list_window_t *tmp = g_malloc(sizeof(list_window_t));
338 memcpy(tmp, lw, sizeof(list_window_t));
339 state->list = g_list_prepend(state->list, (gpointer) tmp);
340 list_window_reset(lw);
341 }
342 }
344 bool
345 list_window_pop_state(list_window_state_t *state, list_window_t *lw)
346 {
347 if( state && state->list )
348 {
349 list_window_t *tmp = state->list->data;
351 memcpy(lw, tmp, sizeof(list_window_t));
352 g_free(tmp);
353 state->list->data = NULL;
354 state->list = g_list_delete_link(state->list, state->list);
355 }
357 // return TRUE if there are still states in the list
358 return (state && state->list) ? TRUE : FALSE;
359 }