Root/scripts/kconfig/lxdialog/util.c

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 <stdarg.h>
23
24#include "dialog.h"
25
26struct dialog_info dlg;
27
28static void set_mono_theme(void)
29{
30    dlg.screen.atr = A_NORMAL;
31    dlg.shadow.atr = A_NORMAL;
32    dlg.dialog.atr = A_NORMAL;
33    dlg.title.atr = A_BOLD;
34    dlg.border.atr = A_NORMAL;
35    dlg.button_active.atr = A_REVERSE;
36    dlg.button_inactive.atr = A_DIM;
37    dlg.button_key_active.atr = A_REVERSE;
38    dlg.button_key_inactive.atr = A_BOLD;
39    dlg.button_label_active.atr = A_REVERSE;
40    dlg.button_label_inactive.atr = A_NORMAL;
41    dlg.inputbox.atr = A_NORMAL;
42    dlg.inputbox_border.atr = A_NORMAL;
43    dlg.searchbox.atr = A_NORMAL;
44    dlg.searchbox_title.atr = A_BOLD;
45    dlg.searchbox_border.atr = A_NORMAL;
46    dlg.position_indicator.atr = A_BOLD;
47    dlg.menubox.atr = A_NORMAL;
48    dlg.menubox_border.atr = A_NORMAL;
49    dlg.item.atr = A_NORMAL;
50    dlg.item_selected.atr = A_REVERSE;
51    dlg.tag.atr = A_BOLD;
52    dlg.tag_selected.atr = A_REVERSE;
53    dlg.tag_key.atr = A_BOLD;
54    dlg.tag_key_selected.atr = A_REVERSE;
55    dlg.check.atr = A_BOLD;
56    dlg.check_selected.atr = A_REVERSE;
57    dlg.uarrow.atr = A_BOLD;
58    dlg.darrow.atr = A_BOLD;
59}
60
61#define DLG_COLOR(dialog, f, b, h) \
62do { \
63    dlg.dialog.fg = (f); \
64    dlg.dialog.bg = (b); \
65    dlg.dialog.hl = (h); \
66} while (0)
67
68static void set_classic_theme(void)
69{
70    DLG_COLOR(screen, COLOR_CYAN, COLOR_BLUE, true);
71    DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, true);
72    DLG_COLOR(dialog, COLOR_BLACK, COLOR_WHITE, false);
73    DLG_COLOR(title, COLOR_YELLOW, COLOR_WHITE, true);
74    DLG_COLOR(border, COLOR_WHITE, COLOR_WHITE, true);
75    DLG_COLOR(button_active, COLOR_WHITE, COLOR_BLUE, true);
76    DLG_COLOR(button_inactive, COLOR_BLACK, COLOR_WHITE, false);
77    DLG_COLOR(button_key_active, COLOR_WHITE, COLOR_BLUE, true);
78    DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_WHITE, false);
79    DLG_COLOR(button_label_active, COLOR_YELLOW, COLOR_BLUE, true);
80    DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_WHITE, true);
81    DLG_COLOR(inputbox, COLOR_BLACK, COLOR_WHITE, false);
82    DLG_COLOR(inputbox_border, COLOR_BLACK, COLOR_WHITE, false);
83    DLG_COLOR(searchbox, COLOR_BLACK, COLOR_WHITE, false);
84    DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_WHITE, true);
85    DLG_COLOR(searchbox_border, COLOR_WHITE, COLOR_WHITE, true);
86    DLG_COLOR(position_indicator, COLOR_YELLOW, COLOR_WHITE, true);
87    DLG_COLOR(menubox, COLOR_BLACK, COLOR_WHITE, false);
88    DLG_COLOR(menubox_border, COLOR_WHITE, COLOR_WHITE, true);
89    DLG_COLOR(item, COLOR_BLACK, COLOR_WHITE, false);
90    DLG_COLOR(item_selected, COLOR_WHITE, COLOR_BLUE, true);
91    DLG_COLOR(tag, COLOR_YELLOW, COLOR_WHITE, true);
92    DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_BLUE, true);
93    DLG_COLOR(tag_key, COLOR_YELLOW, COLOR_WHITE, true);
94    DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_BLUE, true);
95    DLG_COLOR(check, COLOR_BLACK, COLOR_WHITE, false);
96    DLG_COLOR(check_selected, COLOR_WHITE, COLOR_BLUE, true);
97    DLG_COLOR(uarrow, COLOR_GREEN, COLOR_WHITE, true);
98    DLG_COLOR(darrow, COLOR_GREEN, COLOR_WHITE, true);
99}
100
101static void set_blackbg_theme(void)
102{
103    DLG_COLOR(screen, COLOR_RED, COLOR_BLACK, true);
104    DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
105    DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
106    DLG_COLOR(title, COLOR_RED, COLOR_BLACK, false);
107    DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
108
109    DLG_COLOR(button_active, COLOR_YELLOW, COLOR_RED, false);
110    DLG_COLOR(button_inactive, COLOR_YELLOW, COLOR_BLACK, false);
111    DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_RED, true);
112    DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_BLACK, false);
113    DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_RED, false);
114    DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_BLACK, true);
115
116    DLG_COLOR(inputbox, COLOR_YELLOW, COLOR_BLACK, false);
117    DLG_COLOR(inputbox_border, COLOR_YELLOW, COLOR_BLACK, false);
118
119    DLG_COLOR(searchbox, COLOR_YELLOW, COLOR_BLACK, false);
120    DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_BLACK, true);
121    DLG_COLOR(searchbox_border, COLOR_BLACK, COLOR_BLACK, true);
122
123    DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK, false);
124
125    DLG_COLOR(menubox, COLOR_YELLOW, COLOR_BLACK, false);
126    DLG_COLOR(menubox_border, COLOR_BLACK, COLOR_BLACK, true);
127
128    DLG_COLOR(item, COLOR_WHITE, COLOR_BLACK, false);
129    DLG_COLOR(item_selected, COLOR_WHITE, COLOR_RED, false);
130
131    DLG_COLOR(tag, COLOR_RED, COLOR_BLACK, false);
132    DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_RED, true);
133    DLG_COLOR(tag_key, COLOR_RED, COLOR_BLACK, false);
134    DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED, true);
135
136    DLG_COLOR(check, COLOR_YELLOW, COLOR_BLACK, false);
137    DLG_COLOR(check_selected, COLOR_YELLOW, COLOR_RED, true);
138
139    DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
140    DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
141}
142
143static void set_bluetitle_theme(void)
144{
145    set_classic_theme();
146    DLG_COLOR(title, COLOR_BLUE, COLOR_WHITE, true);
147    DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_BLUE, true);
148    DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_BLUE, true);
149    DLG_COLOR(searchbox_title, COLOR_BLUE, COLOR_WHITE, true);
150    DLG_COLOR(position_indicator, COLOR_BLUE, COLOR_WHITE, true);
151    DLG_COLOR(tag, COLOR_BLUE, COLOR_WHITE, true);
152    DLG_COLOR(tag_key, COLOR_BLUE, COLOR_WHITE, true);
153
154}
155
156/*
157 * Select color theme
158 */
159static int set_theme(const char *theme)
160{
161    int use_color = 1;
162    if (!theme)
163        set_bluetitle_theme();
164    else if (strcmp(theme, "classic") == 0)
165        set_classic_theme();
166    else if (strcmp(theme, "bluetitle") == 0)
167        set_bluetitle_theme();
168    else if (strcmp(theme, "blackbg") == 0)
169        set_blackbg_theme();
170    else if (strcmp(theme, "mono") == 0)
171        use_color = 0;
172
173    return use_color;
174}
175
176static void init_one_color(struct dialog_color *color)
177{
178    static int pair = 0;
179
180    pair++;
181    init_pair(pair, color->fg, color->bg);
182    if (color->hl)
183        color->atr = A_BOLD | COLOR_PAIR(pair);
184    else
185        color->atr = COLOR_PAIR(pair);
186}
187
188static void init_dialog_colors(void)
189{
190    init_one_color(&dlg.screen);
191    init_one_color(&dlg.shadow);
192    init_one_color(&dlg.dialog);
193    init_one_color(&dlg.title);
194    init_one_color(&dlg.border);
195    init_one_color(&dlg.button_active);
196    init_one_color(&dlg.button_inactive);
197    init_one_color(&dlg.button_key_active);
198    init_one_color(&dlg.button_key_inactive);
199    init_one_color(&dlg.button_label_active);
200    init_one_color(&dlg.button_label_inactive);
201    init_one_color(&dlg.inputbox);
202    init_one_color(&dlg.inputbox_border);
203    init_one_color(&dlg.searchbox);
204    init_one_color(&dlg.searchbox_title);
205    init_one_color(&dlg.searchbox_border);
206    init_one_color(&dlg.position_indicator);
207    init_one_color(&dlg.menubox);
208    init_one_color(&dlg.menubox_border);
209    init_one_color(&dlg.item);
210    init_one_color(&dlg.item_selected);
211    init_one_color(&dlg.tag);
212    init_one_color(&dlg.tag_selected);
213    init_one_color(&dlg.tag_key);
214    init_one_color(&dlg.tag_key_selected);
215    init_one_color(&dlg.check);
216    init_one_color(&dlg.check_selected);
217    init_one_color(&dlg.uarrow);
218    init_one_color(&dlg.darrow);
219}
220
221/*
222 * Setup for color display
223 */
224static void color_setup(const char *theme)
225{
226    int use_color;
227
228    use_color = set_theme(theme);
229    if (use_color && has_colors()) {
230        start_color();
231        init_dialog_colors();
232    } else
233        set_mono_theme();
234}
235
236/*
237 * Set window to attribute 'attr'
238 */
239void attr_clear(WINDOW * win, int height, int width, chtype attr)
240{
241    int i, j;
242
243    wattrset(win, attr);
244    for (i = 0; i < height; i++) {
245        wmove(win, i, 0);
246        for (j = 0; j < width; j++)
247            waddch(win, ' ');
248    }
249    touchwin(win);
250}
251
252void dialog_clear(void)
253{
254    attr_clear(stdscr, LINES, COLS, dlg.screen.atr);
255    /* Display background title if it exists ... - SLH */
256    if (dlg.backtitle != NULL) {
257        int i;
258
259        wattrset(stdscr, dlg.screen.atr);
260        mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
261        wmove(stdscr, 1, 1);
262        for (i = 1; i < COLS - 1; i++)
263            waddch(stdscr, ACS_HLINE);
264    }
265    wnoutrefresh(stdscr);
266}
267
268/*
269 * Do some initialization for dialog
270 */
271int init_dialog(const char *backtitle)
272{
273    int height, width;
274
275    initscr(); /* Init curses */
276    getmaxyx(stdscr, height, width);
277    if (height < 19 || width < 80) {
278        endwin();
279        return -ERRDISPLAYTOOSMALL;
280    }
281
282    dlg.backtitle = backtitle;
283    color_setup(getenv("MENUCONFIG_COLOR"));
284
285    keypad(stdscr, TRUE);
286    cbreak();
287    noecho();
288    dialog_clear();
289
290    return 0;
291}
292
293void set_dialog_backtitle(const char *backtitle)
294{
295    dlg.backtitle = backtitle;
296}
297
298/*
299 * End using dialog functions.
300 */
301void end_dialog(int x, int y)
302{
303    /* move cursor back to original position */
304    move(y, x);
305    refresh();
306    endwin();
307}
308
309/* Print the title of the dialog. Center the title and truncate
310 * tile if wider than dialog (- 2 chars).
311 **/
312void print_title(WINDOW *dialog, const char *title, int width)
313{
314    if (title) {
315        int tlen = MIN(width - 2, strlen(title));
316        wattrset(dialog, dlg.title.atr);
317        mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
318        mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
319        waddch(dialog, ' ');
320    }
321}
322
323/*
324 * Print a string of text in a window, automatically wrap around to the
325 * next line if the string is too long to fit on one line. Newline
326 * characters '\n' are replaced by spaces. We start on a new line
327 * if there is no room for at least 4 nonblanks following a double-space.
328 */
329void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
330{
331    int newl, cur_x, cur_y;
332    int i, prompt_len, room, wlen;
333    char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
334
335    strcpy(tempstr, prompt);
336
337    prompt_len = strlen(tempstr);
338
339    /*
340     * Remove newlines
341     */
342    for (i = 0; i < prompt_len; i++) {
343        if (tempstr[i] == '\n')
344            tempstr[i] = ' ';
345    }
346
347    if (prompt_len <= width - x * 2) { /* If prompt is short */
348        wmove(win, y, (width - prompt_len) / 2);
349        waddstr(win, tempstr);
350    } else {
351        cur_x = x;
352        cur_y = y;
353        newl = 1;
354        word = tempstr;
355        while (word && *word) {
356            sp = strchr(word, ' ');
357            if (sp)
358                *sp++ = 0;
359
360            /* Wrap to next line if either the word does not fit,
361               or it is the first word of a new sentence, and it is
362               short, and the next word does not fit. */
363            room = width - cur_x;
364            wlen = strlen(word);
365            if (wlen > room ||
366                (newl && wlen < 4 && sp
367                 && wlen + 1 + strlen(sp) > room
368                 && (!(sp2 = strchr(sp, ' '))
369                 || wlen + 1 + (sp2 - sp) > room))) {
370                cur_y++;
371                cur_x = x;
372            }
373            wmove(win, cur_y, cur_x);
374            waddstr(win, word);
375            getyx(win, cur_y, cur_x);
376            cur_x++;
377            if (sp && *sp == ' ') {
378                cur_x++; /* double space */
379                while (*++sp == ' ') ;
380                newl = 1;
381            } else
382                newl = 0;
383            word = sp;
384        }
385    }
386}
387
388/*
389 * Print a button
390 */
391void print_button(WINDOW * win, const char *label, int y, int x, int selected)
392{
393    int i, temp;
394
395    wmove(win, y, x);
396    wattrset(win, selected ? dlg.button_active.atr
397         : dlg.button_inactive.atr);
398    waddstr(win, "<");
399    temp = strspn(label, " ");
400    label += temp;
401    wattrset(win, selected ? dlg.button_label_active.atr
402         : dlg.button_label_inactive.atr);
403    for (i = 0; i < temp; i++)
404        waddch(win, ' ');
405    wattrset(win, selected ? dlg.button_key_active.atr
406         : dlg.button_key_inactive.atr);
407    waddch(win, label[0]);
408    wattrset(win, selected ? dlg.button_label_active.atr
409         : dlg.button_label_inactive.atr);
410    waddstr(win, (char *)label + 1);
411    wattrset(win, selected ? dlg.button_active.atr
412         : dlg.button_inactive.atr);
413    waddstr(win, ">");
414    wmove(win, y, x + temp + 1);
415}
416
417/*
418 * Draw a rectangular box with line drawing characters
419 */
420void
421draw_box(WINDOW * win, int y, int x, int height, int width,
422     chtype box, chtype border)
423{
424    int i, j;
425
426    wattrset(win, 0);
427    for (i = 0; i < height; i++) {
428        wmove(win, y + i, x);
429        for (j = 0; j < width; j++)
430            if (!i && !j)
431                waddch(win, border | ACS_ULCORNER);
432            else if (i == height - 1 && !j)
433                waddch(win, border | ACS_LLCORNER);
434            else if (!i && j == width - 1)
435                waddch(win, box | ACS_URCORNER);
436            else if (i == height - 1 && j == width - 1)
437                waddch(win, box | ACS_LRCORNER);
438            else if (!i)
439                waddch(win, border | ACS_HLINE);
440            else if (i == height - 1)
441                waddch(win, box | ACS_HLINE);
442            else if (!j)
443                waddch(win, border | ACS_VLINE);
444            else if (j == width - 1)
445                waddch(win, box | ACS_VLINE);
446            else
447                waddch(win, box | ' ');
448    }
449}
450
451/*
452 * Draw shadows along the right and bottom edge to give a more 3D look
453 * to the boxes
454 */
455void draw_shadow(WINDOW * win, int y, int x, int height, int width)
456{
457    int i;
458
459    if (has_colors()) { /* Whether terminal supports color? */
460        wattrset(win, dlg.shadow.atr);
461        wmove(win, y + height, x + 2);
462        for (i = 0; i < width; i++)
463            waddch(win, winch(win) & A_CHARTEXT);
464        for (i = y + 1; i < y + height + 1; i++) {
465            wmove(win, i, x + width);
466            waddch(win, winch(win) & A_CHARTEXT);
467            waddch(win, winch(win) & A_CHARTEXT);
468        }
469        wnoutrefresh(win);
470    }
471}
472
473/*
474 * Return the position of the first alphabetic character in a string.
475 */
476int first_alpha(const char *string, const char *exempt)
477{
478    int i, in_paren = 0, c;
479
480    for (i = 0; i < strlen(string); i++) {
481        c = tolower(string[i]);
482
483        if (strchr("<[(", c))
484            ++in_paren;
485        if (strchr(">])", c) && in_paren > 0)
486            --in_paren;
487
488        if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
489            return i;
490    }
491
492    return 0;
493}
494
495/*
496 * ncurses uses ESC to detect escaped char sequences. This resutl in
497 * a small timeout before ESC is actually delivered to the application.
498 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
499 * times esc. But then we need to ignore the second esc to avoid stepping
500 * out one menu too much. Filter away all escaped key sequences since
501 * keypad(FALSE) turn off ncurses support for escape sequences - and thats
502 * needed to make notimeout() do as expected.
503 */
504int on_key_esc(WINDOW *win)
505{
506    int key;
507    int key2;
508    int key3;
509
510    nodelay(win, TRUE);
511    keypad(win, FALSE);
512    key = wgetch(win);
513    key2 = wgetch(win);
514    do {
515        key3 = wgetch(win);
516    } while (key3 != ERR);
517    nodelay(win, FALSE);
518    keypad(win, TRUE);
519    if (key == KEY_ESC && key2 == ERR)
520        return KEY_ESC;
521    else if (key != ERR && key != KEY_ESC && key2 == ERR)
522        ungetch(key);
523
524    return -1;
525}
526
527/* redraw screen in new size */
528int on_key_resize(void)
529{
530    dialog_clear();
531    return KEY_RESIZE;
532}
533
534struct dialog_list *item_cur;
535struct dialog_list item_nil;
536struct dialog_list *item_head;
537
538void item_reset(void)
539{
540    struct dialog_list *p, *next;
541
542    for (p = item_head; p; p = next) {
543        next = p->next;
544        free(p);
545    }
546    item_head = NULL;
547    item_cur = &item_nil;
548}
549
550void item_make(const char *fmt, ...)
551{
552    va_list ap;
553    struct dialog_list *p = malloc(sizeof(*p));
554
555    if (item_head)
556        item_cur->next = p;
557    else
558        item_head = p;
559    item_cur = p;
560    memset(p, 0, sizeof(*p));
561
562    va_start(ap, fmt);
563    vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
564    va_end(ap);
565}
566
567void item_add_str(const char *fmt, ...)
568{
569    va_list ap;
570        size_t avail;
571
572    avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
573
574    va_start(ap, fmt);
575    vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
576          avail, fmt, ap);
577    item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
578    va_end(ap);
579}
580
581void item_set_tag(char tag)
582{
583    item_cur->node.tag = tag;
584}
585void item_set_data(void *ptr)
586{
587    item_cur->node.data = ptr;
588}
589
590void item_set_selected(int val)
591{
592    item_cur->node.selected = val;
593}
594
595int item_activate_selected(void)
596{
597    item_foreach()
598        if (item_is_selected())
599            return 1;
600    return 0;
601}
602
603void *item_data(void)
604{
605    return item_cur->node.data;
606}
607
608char item_tag(void)
609{
610    return item_cur->node.tag;
611}
612
613int item_count(void)
614{
615    int n = 0;
616    struct dialog_list *p;
617
618    for (p = item_head; p; p = p->next)
619        n++;
620    return n;
621}
622
623void item_set(int n)
624{
625    int i = 0;
626    item_foreach()
627        if (i++ == n)
628            return;
629}
630
631int item_n(void)
632{
633    int n = 0;
634    struct dialog_list *p;
635
636    for (p = item_head; p; p = p->next) {
637        if (p == item_cur)
638            return n;
639        n++;
640    }
641    return 0;
642}
643
644const char *item_str(void)
645{
646    return item_cur->node.str;
647}
648
649int item_is_selected(void)
650{
651    return (item_cur->node.selected != 0);
652}
653
654int item_is_tag(char tag)
655{
656    return (item_cur->node.tag == tag);
657}
658

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