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/scripts/kconfig/lxdialog/checklist.c

http://github.com/mirrors/linux
C | 319 lines | 237 code | 45 blank | 37 comment | 51 complexity | 218b273983d0896d44e847df21d68268 MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 *  checklist.c -- implements the checklist box
  4 *
  5 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  6 *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
  7 *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
  8 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
  9 */
 10
 11#include "dialog.h"
 12
 13static int list_width, check_x, item_x;
 14
 15/*
 16 * Print list item
 17 */
 18static void print_item(WINDOW * win, int choice, int selected)
 19{
 20	int i;
 21	char *list_item = malloc(list_width + 1);
 22
 23	strncpy(list_item, item_str(), list_width - item_x);
 24	list_item[list_width - item_x] = '\0';
 25
 26	/* Clear 'residue' of last item */
 27	wattrset(win, dlg.menubox.atr);
 28	wmove(win, choice, 0);
 29	for (i = 0; i < list_width; i++)
 30		waddch(win, ' ');
 31
 32	wmove(win, choice, check_x);
 33	wattrset(win, selected ? dlg.check_selected.atr
 34		 : dlg.check.atr);
 35	if (!item_is_tag(':'))
 36		wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
 37
 38	wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
 39	mvwaddch(win, choice, item_x, list_item[0]);
 40	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
 41	waddstr(win, list_item + 1);
 42	if (selected) {
 43		wmove(win, choice, check_x + 1);
 44		wrefresh(win);
 45	}
 46	free(list_item);
 47}
 48
 49/*
 50 * Print the scroll indicators.
 51 */
 52static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
 53	     int y, int x, int height)
 54{
 55	wmove(win, y, x);
 56
 57	if (scroll > 0) {
 58		wattrset(win, dlg.uarrow.atr);
 59		waddch(win, ACS_UARROW);
 60		waddstr(win, "(-)");
 61	} else {
 62		wattrset(win, dlg.menubox.atr);
 63		waddch(win, ACS_HLINE);
 64		waddch(win, ACS_HLINE);
 65		waddch(win, ACS_HLINE);
 66		waddch(win, ACS_HLINE);
 67	}
 68
 69	y = y + height + 1;
 70	wmove(win, y, x);
 71
 72	if ((height < item_no) && (scroll + choice < item_no - 1)) {
 73		wattrset(win, dlg.darrow.atr);
 74		waddch(win, ACS_DARROW);
 75		waddstr(win, "(+)");
 76	} else {
 77		wattrset(win, dlg.menubox_border.atr);
 78		waddch(win, ACS_HLINE);
 79		waddch(win, ACS_HLINE);
 80		waddch(win, ACS_HLINE);
 81		waddch(win, ACS_HLINE);
 82	}
 83}
 84
 85/*
 86 *  Display the termination buttons
 87 */
 88static void print_buttons(WINDOW * dialog, int height, int width, int selected)
 89{
 90	int x = width / 2 - 11;
 91	int y = height - 2;
 92
 93	print_button(dialog, "Select", y, x, selected == 0);
 94	print_button(dialog, " Help ", y, x + 14, selected == 1);
 95
 96	wmove(dialog, y, x + 1 + 14 * selected);
 97	wrefresh(dialog);
 98}
 99
100/*
101 * Display a dialog box with a list of options that can be turned on or off
102 * in the style of radiolist (only one option turned on at a time).
103 */
104int dialog_checklist(const char *title, const char *prompt, int height,
105		     int width, int list_height)
106{
107	int i, x, y, box_x, box_y;
108	int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
109	WINDOW *dialog, *list;
110
111	/* which item to highlight */
112	item_foreach() {
113		if (item_is_tag('X'))
114			choice = item_n();
115		if (item_is_selected()) {
116			choice = item_n();
117			break;
118		}
119	}
120
121do_resize:
122	if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
123		return -ERRDISPLAYTOOSMALL;
124	if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
125		return -ERRDISPLAYTOOSMALL;
126
127	max_choice = MIN(list_height, item_count());
128
129	/* center dialog box on screen */
130	x = (getmaxx(stdscr) - width) / 2;
131	y = (getmaxy(stdscr) - height) / 2;
132
133	draw_shadow(stdscr, y, x, height, width);
134
135	dialog = newwin(height, width, y, x);
136	keypad(dialog, TRUE);
137
138	draw_box(dialog, 0, 0, height, width,
139		 dlg.dialog.atr, dlg.border.atr);
140	wattrset(dialog, dlg.border.atr);
141	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
142	for (i = 0; i < width - 2; i++)
143		waddch(dialog, ACS_HLINE);
144	wattrset(dialog, dlg.dialog.atr);
145	waddch(dialog, ACS_RTEE);
146
147	print_title(dialog, title, width);
148
149	wattrset(dialog, dlg.dialog.atr);
150	print_autowrap(dialog, prompt, width - 2, 1, 3);
151
152	list_width = width - 6;
153	box_y = height - list_height - 5;
154	box_x = (width - list_width) / 2 - 1;
155
156	/* create new window for the list */
157	list = subwin(dialog, list_height, list_width, y + box_y + 1,
158		      x + box_x + 1);
159
160	keypad(list, TRUE);
161
162	/* draw a box around the list items */
163	draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
164		 dlg.menubox_border.atr, dlg.menubox.atr);
165
166	/* Find length of longest item in order to center checklist */
167	check_x = 0;
168	item_foreach()
169		check_x = MAX(check_x, strlen(item_str()) + 4);
170	check_x = MIN(check_x, list_width);
171
172	check_x = (list_width - check_x) / 2;
173	item_x = check_x + 4;
174
175	if (choice >= list_height) {
176		scroll = choice - list_height + 1;
177		choice -= scroll;
178	}
179
180	/* Print the list */
181	for (i = 0; i < max_choice; i++) {
182		item_set(scroll + i);
183		print_item(list, i, i == choice);
184	}
185
186	print_arrows(dialog, choice, item_count(), scroll,
187		     box_y, box_x + check_x + 5, list_height);
188
189	print_buttons(dialog, height, width, 0);
190
191	wnoutrefresh(dialog);
192	wnoutrefresh(list);
193	doupdate();
194
195	while (key != KEY_ESC) {
196		key = wgetch(dialog);
197
198		for (i = 0; i < max_choice; i++) {
199			item_set(i + scroll);
200			if (toupper(key) == toupper(item_str()[0]))
201				break;
202		}
203
204		if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
205		    key == '+' || key == '-') {
206			if (key == KEY_UP || key == '-') {
207				if (!choice) {
208					if (!scroll)
209						continue;
210					/* Scroll list down */
211					if (list_height > 1) {
212						/* De-highlight current first item */
213						item_set(scroll);
214						print_item(list, 0, FALSE);
215						scrollok(list, TRUE);
216						wscrl(list, -1);
217						scrollok(list, FALSE);
218					}
219					scroll--;
220					item_set(scroll);
221					print_item(list, 0, TRUE);
222					print_arrows(dialog, choice, item_count(),
223						     scroll, box_y, box_x + check_x + 5, list_height);
224
225					wnoutrefresh(dialog);
226					wrefresh(list);
227
228					continue;	/* wait for another key press */
229				} else
230					i = choice - 1;
231			} else if (key == KEY_DOWN || key == '+') {
232				if (choice == max_choice - 1) {
233					if (scroll + choice >= item_count() - 1)
234						continue;
235					/* Scroll list up */
236					if (list_height > 1) {
237						/* De-highlight current last item before scrolling up */
238						item_set(scroll + max_choice - 1);
239						print_item(list,
240							    max_choice - 1,
241							    FALSE);
242						scrollok(list, TRUE);
243						wscrl(list, 1);
244						scrollok(list, FALSE);
245					}
246					scroll++;
247					item_set(scroll + max_choice - 1);
248					print_item(list, max_choice - 1, TRUE);
249
250					print_arrows(dialog, choice, item_count(),
251						     scroll, box_y, box_x + check_x + 5, list_height);
252
253					wnoutrefresh(dialog);
254					wrefresh(list);
255
256					continue;	/* wait for another key press */
257				} else
258					i = choice + 1;
259			}
260			if (i != choice) {
261				/* De-highlight current item */
262				item_set(scroll + choice);
263				print_item(list, choice, FALSE);
264				/* Highlight new item */
265				choice = i;
266				item_set(scroll + choice);
267				print_item(list, choice, TRUE);
268				wnoutrefresh(dialog);
269				wrefresh(list);
270			}
271			continue;	/* wait for another key press */
272		}
273		switch (key) {
274		case 'H':
275		case 'h':
276		case '?':
277			button = 1;
278			/* fall-through */
279		case 'S':
280		case 's':
281		case ' ':
282		case '\n':
283			item_foreach()
284				item_set_selected(0);
285			item_set(scroll + choice);
286			item_set_selected(1);
287			delwin(list);
288			delwin(dialog);
289			return button;
290		case TAB:
291		case KEY_LEFT:
292		case KEY_RIGHT:
293			button = ((key == KEY_LEFT ? --button : ++button) < 0)
294			    ? 1 : (button > 1 ? 0 : button);
295
296			print_buttons(dialog, height, width, button);
297			wrefresh(dialog);
298			break;
299		case 'X':
300		case 'x':
301			key = KEY_ESC;
302			break;
303		case KEY_ESC:
304			key = on_key_esc(dialog);
305			break;
306		case KEY_RESIZE:
307			delwin(list);
308			delwin(dialog);
309			on_key_resize();
310			goto do_resize;
311		}
312
313		/* Now, update everything... */
314		doupdate();
315	}
316	delwin(list);
317	delwin(dialog);
318	return key;		/* ESC pressed */
319}