1 /*
2 * util.c
3 *
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include "dialog.h"
23
24
25 /* use colors by default? */
26 bool use_colors = 1;
27
28 const char *backtitle = NULL;
29
30 const char *dialog_result;
31
32 /*
33 * Attribute values, default is for mono display
34 */
35 chtype attributes[] =
36 {
37 A_NORMAL, /* screen_attr */
38 A_NORMAL, /* shadow_attr */
39 A_NORMAL, /* dialog_attr */
40 A_BOLD, /* title_attr */
41 A_NORMAL, /* border_attr */
42 A_REVERSE, /* button_active_attr */
43 A_DIM, /* button_inactive_attr */
44 A_REVERSE, /* button_key_active_attr */
45 A_BOLD, /* button_key_inactive_attr */
46 A_REVERSE, /* button_label_active_attr */
47 A_NORMAL, /* button_label_inactive_attr */
48 A_NORMAL, /* inputbox_attr */
49 A_NORMAL, /* inputbox_border_attr */
50 A_NORMAL, /* searchbox_attr */
51 A_BOLD, /* searchbox_title_attr */
52 A_NORMAL, /* searchbox_border_attr */
53 A_BOLD, /* position_indicator_attr */
54 A_NORMAL, /* menubox_attr */
55 A_NORMAL, /* menubox_border_attr */
56 A_NORMAL, /* item_attr */
57 A_REVERSE, /* item_selected_attr */
58 A_BOLD, /* tag_attr */
59 A_REVERSE, /* tag_selected_attr */
60 A_BOLD, /* tag_key_attr */
61 A_REVERSE, /* tag_key_selected_attr */
62 A_BOLD, /* check_attr */
63 A_REVERSE, /* check_selected_attr */
64 A_BOLD, /* uarrow_attr */
65 A_BOLD /* darrow_attr */
66 };
67
68
69 #include "colors.h"
70
71 /*
72 * Table of color values
73 */
74 int color_table[][3] =
75 {
76 {SCREEN_FG, SCREEN_BG, SCREEN_HL},
77 {SHADOW_FG, SHADOW_BG, SHADOW_HL},
78 {DIALOG_FG, DIALOG_BG, DIALOG_HL},
79 {TITLE_FG, TITLE_BG, TITLE_HL},
80 {BORDER_FG, BORDER_BG, BORDER_HL},
81 {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},
82 {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},
83 {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},
84 {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG, BUTTON_KEY_INACTIVE_HL},
85 {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG, BUTTON_LABEL_ACTIVE_HL},
86 {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,
87 BUTTON_LABEL_INACTIVE_HL},
88 {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},
89 {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},
90 {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},
91 {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},
92 {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},
93 {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},
94 {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},
95 {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},
96 {ITEM_FG, ITEM_BG, ITEM_HL},
97 {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},
98 {TAG_FG, TAG_BG, TAG_HL},
99 {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},
100 {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},
101 {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},
102 {CHECK_FG, CHECK_BG, CHECK_HL},
103 {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},
104 {UARROW_FG, UARROW_BG, UARROW_HL},
105 {DARROW_FG, DARROW_BG, DARROW_HL},
106 }; /* color_table */
107
108 /*
109 * Set window to attribute 'attr'
110 */
111 void
112 attr_clear (WINDOW * win, int height, int width, chtype attr)
113 {
114 int i, j;
115
116 wattrset (win, attr);
117 for (i = 0; i < height; i++) {
118 wmove (win, i, 0);
119 for (j = 0; j < width; j++)
120 waddch (win, ' ');
121 }
122 touchwin (win);
123 }
124
125 void dialog_clear (void)
126 {
127 attr_clear (stdscr, LINES, COLS, screen_attr);
128 /* Display background title if it exists ... - SLH */
129 if (backtitle != NULL) {
130 int i;
131
132 wattrset (stdscr, screen_attr);
133 mvwaddstr (stdscr, 0, 1, (char *)backtitle);
134 wmove (stdscr, 1, 1);
135 for (i = 1; i < COLS - 1; i++)
136 waddch (stdscr, ACS_HLINE);
137 }
138 wnoutrefresh (stdscr);
139 }
140
141 /*
142 * Do some initialization for dialog
143 */
144 void
145 init_dialog (void)
146 {
147 initscr (); /* Init curses */
148 keypad (stdscr, TRUE);
149 cbreak ();
150 noecho ();
151
152
153 if (use_colors) /* Set up colors */
154 color_setup ();
155
156
157 dialog_clear ();
158 }
159
160 /*
161 * Setup for color display
162 */
163 void
164 color_setup (void)
165 {
166 int i;
167
168 if (has_colors ()) { /* Terminal supports color? */
169 start_color ();
170
171 /* Initialize color pairs */
172 for (i = 0; i < ATTRIBUTE_COUNT; i++)
173 init_pair (i + 1, color_table[i][0], color_table[i][1]);
174
175 /* Setup color attributes */
176 for (i = 0; i < ATTRIBUTE_COUNT; i++)
177 attributes[i] = C_ATTR (color_table[i][2], i + 1);
178 }
179 }
180
181 /*
182 * End using dialog functions.
183 */
184 void
185 end_dialog (void)
186 {
187 endwin ();
188 }
189
190
191 /*
192 * Print a string of text in a window, automatically wrap around to the
193 * next line if the string is too long to fit on one line. Newline
194 * characters '\n' are replaced by spaces. We start on a new line
195 * if there is no room for at least 4 nonblanks following a double-space.
196 */
197 void
198 print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)
199 {
200 int newl, cur_x, cur_y;
201 int i, prompt_len, room, wlen;
202 char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
203
204 strcpy (tempstr, prompt);
205
206 prompt_len = strlen(tempstr);
207
208 /*
209 * Remove newlines
210 */
211 for(i=0; i<prompt_len; i++) {
212 if(tempstr[i] == '\n') tempstr[i] = ' ';
213 }
214
215 if (prompt_len <= width - x * 2) { /* If prompt is short */
216 wmove (win, y, (width - prompt_len) / 2);
217 waddstr (win, tempstr);
218 } else {
219 cur_x = x;
220 cur_y = y;
221 newl = 1;
222 word = tempstr;
223 while (word && *word) {
224 sp = index(word, ' ');
225 if (sp)
226 *sp++ = 0;
227
228 /* Wrap to next line if either the word does not fit,
229 or it is the first word of a new sentence, and it is
230 short, and the next word does not fit. */
231 room = width - cur_x;
232 wlen = strlen(word);
233 if (wlen > room ||
234 (newl && wlen < 4 && sp && wlen+1+strlen(sp) > room
235 && (!(sp2 = index(sp, ' ')) || wlen+1+(sp2-sp) > room))) {
236 cur_y++;
237 cur_x = x;
238 }
239 wmove (win, cur_y, cur_x);
240 waddstr (win, word);
241 getyx (win, cur_y, cur_x);
242 cur_x++;
243 if (sp && *sp == ' ') {
244 cur_x++; /* double space */
245 while (*++sp == ' ');
246 newl = 1;
247 } else
248 newl = 0;
249 word = sp;
250 }
251 }
252 }
253
254 /*
255 * Print a button
256 */
257 void
258 print_button (WINDOW * win, const char *label, int y, int x, int selected)
259 {
260 int i, temp;
261
262 wmove (win, y, x);
263 wattrset (win, selected ? button_active_attr : button_inactive_attr);
264 waddstr (win, "<");
265 temp = strspn (label, " ");
266 label += temp;
267 wattrset (win, selected ? button_label_active_attr
268 : button_label_inactive_attr);
269 for (i = 0; i < temp; i++)
270 waddch (win, ' ');
271 wattrset (win, selected ? button_key_active_attr
272 : button_key_inactive_attr);
273 waddch (win, label[0]);
274 wattrset (win, selected ? button_label_active_attr
275 : button_label_inactive_attr);
276 waddstr (win, (char *)label + 1);
277 wattrset (win, selected ? button_active_attr : button_inactive_attr);
278 waddstr (win, ">");
279 wmove (win, y, x + temp + 1);
280 }
281
282 /*
283 * Draw a rectangular box with line drawing characters
284 */
285 void
286 draw_box (WINDOW * win, int y, int x, int height, int width,
287 chtype box, chtype border)
288 {
289 int i, j;
290
291 wattrset (win, 0);
292 for (i = 0; i < height; i++) {
293 wmove (win, y + i, x);
294 for (j = 0; j < width; j++)
295 if (!i && !j)
296 waddch (win, border | ACS_ULCORNER);
297 else if (i == height - 1 && !j)
298 waddch (win, border | ACS_LLCORNER);
299 else if (!i && j == width - 1)
300 waddch (win, box | ACS_URCORNER);
301 else if (i == height - 1 && j == width - 1)
302 waddch (win, box | ACS_LRCORNER);
303 else if (!i)
304 waddch (win, border | ACS_HLINE);
305 else if (i == height - 1)
306 waddch (win, box | ACS_HLINE);
307 else if (!j)
308 waddch (win, border | ACS_VLINE);
309 else if (j == width - 1)
310 waddch (win, box | ACS_VLINE);
311 else
312 waddch (win, box | ' ');
313 }
314 }
315
316 /*
317 * Draw shadows along the right and bottom edge to give a more 3D look
318 * to the boxes
319 */
320 void
321 draw_shadow (WINDOW * win, int y, int x, int height, int width)
322 {
323 int i;
324
325 if (has_colors ()) { /* Whether terminal supports color? */
326 wattrset (win, shadow_attr);
327 wmove (win, y + height, x + 2);
328 for (i = 0; i < width; i++)
329 waddch (win, winch (win) & A_CHARTEXT);
330 for (i = y + 1; i < y + height + 1; i++) {
331 wmove (win, i, x + width);
332 waddch (win, winch (win) & A_CHARTEXT);
333 waddch (win, winch (win) & A_CHARTEXT);
334 }
335 wnoutrefresh (win);
336 }
337 }
338
339 /*
340 * Return the position of the first alphabetic character in a string.
341 */
342 int
343 first_alpha(const char *string, const char *exempt)
344 {
345 int i, in_paren=0, c;
346
347 for (i = 0; i < strlen(string); i++) {
348 c = tolower(string[i]);
349
350 if (strchr("<[(", c)) ++in_paren;
351 if (strchr(">])", c)) --in_paren;
352
353 if ((! in_paren) && isalpha(c) &&
354 strchr(exempt, c) == 0)
355 return i;
356 }
357
358 return 0;
359 }
360
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