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 /* use colors by default? */
25 bool use_colors = 1;
26
27 const char *backtitle = NULL;
28
29 /*
30 * Attribute values, default is for mono display
31 */
32 chtype attributes[] = {
33 A_NORMAL, /* screen_attr */
34 A_NORMAL, /* shadow_attr */
35 A_NORMAL, /* dialog_attr */
36 A_BOLD, /* title_attr */
37 A_NORMAL, /* border_attr */
38 A_REVERSE, /* button_active_attr */
39 A_DIM, /* button_inactive_attr */
40 A_REVERSE, /* button_key_active_attr */
41 A_BOLD, /* button_key_inactive_attr */
42 A_REVERSE, /* button_label_active_attr */
43 A_NORMAL, /* button_label_inactive_attr */
44 A_NORMAL, /* inputbox_attr */
45 A_NORMAL, /* inputbox_border_attr */
46 A_NORMAL, /* searchbox_attr */
47 A_BOLD, /* searchbox_title_attr */
48 A_NORMAL, /* searchbox_border_attr */
49 A_BOLD, /* position_indicator_attr */
50 A_NORMAL, /* menubox_attr */
51 A_NORMAL, /* menubox_border_attr */
52 A_NORMAL, /* item_attr */
53 A_REVERSE, /* item_selected_attr */
54 A_BOLD, /* tag_attr */
55 A_REVERSE, /* tag_selected_attr */
56 A_BOLD, /* tag_key_attr */
57 A_REVERSE, /* tag_key_selected_attr */
58 A_BOLD, /* check_attr */
59 A_REVERSE, /* check_selected_attr */
60 A_BOLD, /* uarrow_attr */
61 A_BOLD /* darrow_attr */
62 };
63
64 #include "colors.h"
65
66 /*
67 * Table of color values
68 */
69 int color_table[][3] = {
70 {SCREEN_FG, SCREEN_BG, SCREEN_HL},
71 {SHADOW_FG, SHADOW_BG, SHADOW_HL},
72 {DIALOG_FG, DIALOG_BG, DIALOG_HL},
73 {TITLE_FG, TITLE_BG, TITLE_HL},
74 {BORDER_FG, BORDER_BG, BORDER_HL},
75 {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},
76 {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},
77 {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},
78 {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG,
79 BUTTON_KEY_INACTIVE_HL},
80 {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG,
81 BUTTON_LABEL_ACTIVE_HL},
82 {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,
83 BUTTON_LABEL_INACTIVE_HL},
84 {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},
85 {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},
86 {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},
87 {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},
88 {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},
89 {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},
90 {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},
91 {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},
92 {ITEM_FG, ITEM_BG, ITEM_HL},
93 {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},
94 {TAG_FG, TAG_BG, TAG_HL},
95 {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},
96 {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},
97 {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},
98 {CHECK_FG, CHECK_BG, CHECK_HL},
99 {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},
100 {UARROW_FG, UARROW_BG, UARROW_HL},
101 {DARROW_FG, DARROW_BG, DARROW_HL},
102 }; /* color_table */
103
104 /*
105 * Set window to attribute 'attr'
106 */
attr_clear(WINDOW * win,int height,int width,chtype attr)107 void attr_clear(WINDOW * win, int height, int width, chtype attr)
108 {
109 int i, j;
110
111 wattrset(win, attr);
112 for (i = 0; i < height; i++) {
113 wmove(win, i, 0);
114 for (j = 0; j < width; j++)
115 waddch(win, ' ');
116 }
117 touchwin(win);
118 }
119
dialog_clear(void)120 void dialog_clear(void)
121 {
122 attr_clear(stdscr, LINES, COLS, screen_attr);
123 /* Display background title if it exists ... - SLH */
124 if (backtitle != NULL) {
125 int i;
126
127 wattrset(stdscr, screen_attr);
128 mvwaddstr(stdscr, 0, 1, (char *)backtitle);
129 wmove(stdscr, 1, 1);
130 for (i = 1; i < COLS - 1; i++)
131 waddch(stdscr, ACS_HLINE);
132 }
133 wnoutrefresh(stdscr);
134 }
135
136 /*
137 * Do some initialization for dialog
138 */
init_dialog(void)139 void init_dialog(void)
140 {
141 initscr(); /* Init curses */
142 keypad(stdscr, TRUE);
143 cbreak();
144 noecho();
145
146 if (use_colors) /* Set up colors */
147 color_setup();
148
149 dialog_clear();
150 }
151
152 /*
153 * Setup for color display
154 */
color_setup(void)155 void color_setup(void)
156 {
157 int i;
158
159 if (has_colors()) { /* Terminal supports color? */
160 start_color();
161
162 /* Initialize color pairs */
163 for (i = 0; i < ATTRIBUTE_COUNT; i++)
164 init_pair(i + 1, color_table[i][0], color_table[i][1]);
165
166 /* Setup color attributes */
167 for (i = 0; i < ATTRIBUTE_COUNT; i++)
168 attributes[i] = C_ATTR(color_table[i][2], i + 1);
169 }
170 }
171
172 /*
173 * End using dialog functions.
174 */
end_dialog(void)175 void end_dialog(void)
176 {
177 endwin();
178 }
179
180 /* Print the title of the dialog. Center the title and truncate
181 * tile if wider than dialog (- 2 chars).
182 **/
print_title(WINDOW * dialog,const char * title,int width)183 void print_title(WINDOW *dialog, const char *title, int width)
184 {
185 if (title) {
186 int tlen = MIN(width - 2, strlen(title));
187 wattrset(dialog, title_attr);
188 mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
189 mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
190 waddch(dialog, ' ');
191 }
192 }
193
194 /*
195 * Print a string of text in a window, automatically wrap around to the
196 * next line if the string is too long to fit on one line. Newline
197 * characters '\n' are replaced by spaces. We start on a new line
198 * if there is no room for at least 4 nonblanks following a double-space.
199 */
print_autowrap(WINDOW * win,const char * prompt,int width,int y,int x)200 void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
201 {
202 int newl, cur_x, cur_y;
203 int i, prompt_len, room, wlen;
204 char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
205
206 strcpy(tempstr, prompt);
207
208 prompt_len = strlen(tempstr);
209
210 /*
211 * Remove newlines
212 */
213 for (i = 0; i < prompt_len; i++) {
214 if (tempstr[i] == '\n')
215 tempstr[i] = ' ';
216 }
217
218 if (prompt_len <= width - x * 2) { /* If prompt is short */
219 wmove(win, y, (width - prompt_len) / 2);
220 waddstr(win, tempstr);
221 } else {
222 cur_x = x;
223 cur_y = y;
224 newl = 1;
225 word = tempstr;
226 while (word && *word) {
227 sp = strchr(word, ' ');
228 if (sp)
229 *sp++ = 0;
230
231 /* Wrap to next line if either the word does not fit,
232 or it is the first word of a new sentence, and it is
233 short, and the next word does not fit. */
234 room = width - cur_x;
235 wlen = strlen(word);
236 if (wlen > room ||
237 (newl && wlen < 4 && sp
238 && wlen + 1 + strlen(sp) > room
239 && (!(sp2 = strchr(sp, ' '))
240 || wlen + 1 + (sp2 - sp) > room))) {
241 cur_y++;
242 cur_x = x;
243 }
244 wmove(win, cur_y, cur_x);
245 waddstr(win, word);
246 getyx(win, cur_y, cur_x);
247 cur_x++;
248 if (sp && *sp == ' ') {
249 cur_x++; /* double space */
250 while (*++sp == ' ') ;
251 newl = 1;
252 } else
253 newl = 0;
254 word = sp;
255 }
256 }
257 }
258
259 /*
260 * Print a button
261 */
print_button(WINDOW * win,const char * label,int y,int x,int selected)262 void print_button(WINDOW * win, const char *label, int y, int x, int selected)
263 {
264 int i, temp;
265
266 wmove(win, y, x);
267 wattrset(win, selected ? button_active_attr : button_inactive_attr);
268 waddstr(win, "<");
269 temp = strspn(label, " ");
270 label += temp;
271 wattrset(win, selected ? button_label_active_attr
272 : button_label_inactive_attr);
273 for (i = 0; i < temp; i++)
274 waddch(win, ' ');
275 wattrset(win, selected ? button_key_active_attr
276 : button_key_inactive_attr);
277 waddch(win, label[0]);
278 wattrset(win, selected ? button_label_active_attr
279 : button_label_inactive_attr);
280 waddstr(win, (char *)label + 1);
281 wattrset(win, selected ? button_active_attr : button_inactive_attr);
282 waddstr(win, ">");
283 wmove(win, y, x + temp + 1);
284 }
285
286 /*
287 * Draw a rectangular box with line drawing characters
288 */
289 void
draw_box(WINDOW * win,int y,int x,int height,int width,chtype box,chtype border)290 draw_box(WINDOW * win, int y, int x, int height, int width,
291 chtype box, chtype border)
292 {
293 int i, j;
294
295 wattrset(win, 0);
296 for (i = 0; i < height; i++) {
297 wmove(win, y + i, x);
298 for (j = 0; j < width; j++)
299 if (!i && !j)
300 waddch(win, border | ACS_ULCORNER);
301 else if (i == height - 1 && !j)
302 waddch(win, border | ACS_LLCORNER);
303 else if (!i && j == width - 1)
304 waddch(win, box | ACS_URCORNER);
305 else if (i == height - 1 && j == width - 1)
306 waddch(win, box | ACS_LRCORNER);
307 else if (!i)
308 waddch(win, border | ACS_HLINE);
309 else if (i == height - 1)
310 waddch(win, box | ACS_HLINE);
311 else if (!j)
312 waddch(win, border | ACS_VLINE);
313 else if (j == width - 1)
314 waddch(win, box | ACS_VLINE);
315 else
316 waddch(win, box | ' ');
317 }
318 }
319
320 /*
321 * Draw shadows along the right and bottom edge to give a more 3D look
322 * to the boxes
323 */
draw_shadow(WINDOW * win,int y,int x,int height,int width)324 void draw_shadow(WINDOW * win, int y, int x, int height, int width)
325 {
326 int i;
327
328 if (has_colors()) { /* Whether terminal supports color? */
329 wattrset(win, shadow_attr);
330 wmove(win, y + height, x + 2);
331 for (i = 0; i < width; i++)
332 waddch(win, winch(win) & A_CHARTEXT);
333 for (i = y + 1; i < y + height + 1; i++) {
334 wmove(win, i, x + width);
335 waddch(win, winch(win) & A_CHARTEXT);
336 waddch(win, winch(win) & A_CHARTEXT);
337 }
338 wnoutrefresh(win);
339 }
340 }
341
342 /*
343 * Return the position of the first alphabetic character in a string.
344 */
first_alpha(const char * string,const char * exempt)345 int first_alpha(const char *string, const char *exempt)
346 {
347 int i, in_paren = 0, c;
348
349 for (i = 0; i < strlen(string); i++) {
350 c = tolower(string[i]);
351
352 if (strchr("<[(", c))
353 ++in_paren;
354 if (strchr(">])", c) && in_paren > 0)
355 --in_paren;
356
357 if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
358 return i;
359 }
360
361 return 0;
362 }
363