patch-1.3.60 linux/scripts/lxdialog/checklist.c

• Lines: 362
• Date: Wed Feb 7 09:47:28 1996
• Orig file: v1.3.59/linux/scripts/lxdialog/checklist.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.59/linux/scripts/lxdialog/checklist.c linux/scripts/lxdialog/checklist.c
@@ -0,0 +1,361 @@
+/*
+ *  checklist.c -- implements the checklist box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
+ *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+static int list_width, check_x, item_x, checkflag;
+
+/*
+ * Print list item
+ */
+static void
+print_item (WINDOW * win, const char *item, int status,
+	    int choice, int selected)
+{
+    int i;
+
+    /* Clear 'residue' of last item */
+    wattrset (win, menubox_attr);
+    wmove (win, choice, 0);
+    for (i = 0; i < list_width; i++)
+	waddch (win, ' ');
+
+    wmove (win, choice, check_x);
+    wattrset (win, selected ? check_selected_attr : check_attr);
+    if (checkflag == FLAG_CHECK)
+	wprintw (win, "[%c]", status ? 'X' : ' ');
+    else
+	wprintw (win, "(%c)", status ? 'X' : ' ');
+
+    wattrset (win, selected ? tag_selected_attr : tag_attr);
+    mvwaddch(win, choice, item_x, item[0]);
+    wattrset (win, selected ? item_selected_attr : item_attr);
+    waddstr (win, (char *)item+1);
+}
+
+/*
+ * Print the scroll indicators.
+ */
+static void
+print_arrows (WINDOW * win, int choice, int item_no, int scroll,
+		int y, int x, int height)
+{
+    wmove(win, y, x);
+
+    if (scroll > 0) {
+	wattrset (win, uarrow_attr);
+	waddch (win, ACS_UARROW);
+	waddstr (win, "(-)");
+    }
+    else {
+	wattrset (win, menubox_attr);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+    }
+
+   y = y + height + 1;
+   wmove(win, y, x);
+
+   if ((height < item_no) && (scroll + choice < item_no - 1)) {
+	wattrset (win, darrow_attr);
+	waddch (win, ACS_DARROW);
+	waddstr (win, "(+)");
+    }
+    else {
+	wattrset (win, menubox_border_attr);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+	waddch (win, ACS_HLINE);
+   }
+}
+
+/*
+ *  Display the termination buttons
+ */
+static void
+print_buttons( WINDOW *dialog, int height, int width, int okval, int cancelval)
+{
+    int x = width / 2 - 11;
+    int y = height - 2;
+
+    print_button (dialog, "Select", y, x, okval);
+    print_button (dialog, " Help ", y, x + 14, cancelval);
+
+    wrefresh (dialog);
+}
+
+/*
+ * Display a dialog box with a list of options that can be turned on or off
+ * The `flag' parameter is used to select between radiolist and checklist.
+ */
+int
+dialog_checklist (const char *title, const char *prompt, int height, int width,
+	int list_height, int item_no, const char * const * items, int flag,
+	int separate_output)
+{
+    int i, x, y, cur_x, cur_y, box_x, box_y;
+    int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
+    WINDOW *dialog, *list;
+
+    checkflag = flag;
+
+    /* Allocate space for storing item on/off status */
+    if ((status = malloc (sizeof (int) * item_no)) == NULL) {
+	endwin ();
+	fprintf (stderr,
+		 "\nCan't allocate memory in dialog_checklist().\n");
+	exit (-1);
+    }
+
+    /* Initializes status */
+    for (i = 0; i < item_no; i++) {
+	status[i] = !strcasecmp (items[i * 3 + 2], "on");
+	if (!choice && status[i])
+            choice = i;
+    }
+
+    max_choice = MIN (list_height, item_no);
+
+    /* center dialog box on screen */
+    x = (COLS - width) / 2;
+    y = (LINES - height) / 2;
+
+    draw_shadow (stdscr, y, x, height, width);
+
+    dialog = newwin (height, width, y, x);
+    keypad (dialog, TRUE);
+
+    draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
+    wattrset (dialog, border_attr);
+    mvwaddch (dialog, height-3, 0, ACS_LTEE);
+    for (i = 0; i < width - 2; i++)
+	waddch (dialog, ACS_HLINE);
+    wattrset (dialog, dialog_attr);
+    waddch (dialog, ACS_RTEE);
+
+    if (title != NULL) {
+	wattrset (dialog, title_attr);
+	mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
+	waddstr (dialog, (char *)title);
+	waddch (dialog, ' ');
+    }
+
+    wattrset (dialog, dialog_attr);
+    print_autowrap (dialog, prompt, width - 2, 1, 3);
+
+    list_width = width - 6;
+    getyx (dialog, cur_y, cur_x);
+    box_y = height - list_height - 5;
+    box_x = (width - list_width) / 2 - 1;
+
+    /* create new window for the list */
+    list = subwin (dialog, list_height, list_width, y+box_y+1, x+box_x+1);
+
+    keypad (list, TRUE);
+
+    /* draw a box around the list items */
+    draw_box (dialog, box_y, box_x, list_height + 2, list_width + 2,
+	      menubox_border_attr, menubox_attr);
+
+    /* Find length of longest item in order to center checklist */
+    check_x = 0;
+    for (i = 0; i < item_no; i++) 
+	check_x = MAX (check_x, + strlen (items[i * 3 + 1]) + 4);
+
+    check_x = (list_width - check_x) / 2;
+    item_x = check_x + 4;
+
+    /* Print the list */
+    for (i = 0; i < max_choice; i++)
+	print_item (list, items[i * 3 + 1], status[i], i, i == choice);
+
+    wnoutrefresh (list);
+
+    print_arrows(dialog, choice, item_no, scroll,
+			box_y, box_x + check_x + 5, list_height);
+
+    print_buttons(dialog, height, width, TRUE, FALSE);
+
+    while (key != ESC) {
+	key = wgetch (dialog);
+
+    	for (i = 0; i < max_choice; i++)
+            if (toupper(key) == toupper(items[(scroll+i)*3+1][0]))
+                break;
+
+
+	if ( i < max_choice || key == KEY_UP || key == KEY_DOWN || 
+	    key == '+' || key == '-' ) {
+	    if (key == KEY_UP || key == '-') {
+		if (!choice) {
+		    if (!scroll)
+			continue;
+		    /* Scroll list down */
+		    getyx (dialog, cur_y, cur_x);
+		    if (list_height > 1) {
+			/* De-highlight current first item */
+			print_item (list, items[scroll * 3 + 1],
+					status[scroll], 0, FALSE);
+			scrollok (list, TRUE);
+			wscrl (list, -1);
+			scrollok (list, FALSE);
+		    }
+		    scroll--;
+		    print_item (list, items[scroll * 3 + 1],
+				status[scroll], 0, TRUE);
+		    wnoutrefresh (list);
+
+    		    print_arrows(dialog, choice, item_no, scroll,
+				box_y, box_x + check_x + 5, list_height);
+
+		    wmove (dialog, cur_y, cur_x);
+		    wrefresh (dialog);
+
+		    continue;	/* wait for another key press */
+		} else
+		    i = choice - 1;
+	    } else if (key == KEY_DOWN || key == '+') {
+		if (choice == max_choice - 1) {
+		    if (scroll + choice >= item_no - 1)
+			continue;
+		    /* Scroll list up */
+		    getyx (dialog, cur_y, cur_x);
+		    if (list_height > 1) {
+			/* De-highlight current last item before scrolling up */
+			print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
+				    status[scroll + max_choice - 1],
+				    max_choice - 1, FALSE);
+			scrollok (list, TRUE);
+			scroll (list);
+			scrollok (list, FALSE);
+		    }
+		    scroll++;
+		    print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
+				status[scroll + max_choice - 1],
+				max_choice - 1, TRUE);
+		    wnoutrefresh (list);
+
+    		    print_arrows(dialog, choice, item_no, scroll,
+				box_y, box_x + check_x + 5, list_height);
+
+		    wmove (dialog, cur_y, cur_x);
+		    wrefresh (dialog);
+
+		    continue;	/* wait for another key press */
+		} else
+		    i = choice + 1;
+	    }
+	    if (i != choice) {
+		/* De-highlight current item */
+		getyx (dialog, cur_y, cur_x);
+		print_item (list, items[(scroll + choice) * 3 + 1],
+			    status[scroll + choice], choice, FALSE);
+		/* Highlight new item */
+		choice = i;
+		print_item (list, items[(scroll + choice) * 3 + 1],
+			    status[scroll + choice], choice, TRUE);
+		wnoutrefresh (list);
+		wmove (dialog, cur_y, cur_x);
+		wrefresh (dialog);
+	    }
+	    continue;		/* wait for another key press */
+	}
+	switch (key) {
+	case 'H':
+	case 'h':
+	case '?':
+	    delwin (dialog);
+	    free (status);
+	    return 1;
+	    return 1;
+	case TAB:
+	case KEY_LEFT:
+	case KEY_RIGHT:
+	    if (!button) {
+		button = 1;	/* "Help" button selected */
+		print_buttons(dialog, height, width, FALSE, TRUE);
+	    } else {
+		button = 0;	/* "OK" button selected */
+		print_buttons(dialog, height, width, TRUE, FALSE);
+	    }
+	    wrefresh (dialog);
+	    break;
+	case 'S':
+	case 's':
+	case ' ':
+	case '\n':
+	    if (!button) {
+		if (flag == FLAG_CHECK) {
+		    status[scroll + choice] = !status[scroll + choice];
+		    getyx (dialog, cur_y, cur_x);
+		    wmove (list, choice, check_x);
+		    wattrset (list, check_selected_attr);
+		    wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
+		} else {
+		    if (!status[scroll + choice]) {
+			for (i = 0; i < item_no; i++)
+			    status[i] = 0;
+			status[scroll + choice] = 1;
+			getyx (dialog, cur_y, cur_x);
+			for (i = 0; i < max_choice; i++)
+			    print_item (list, items[(scroll + i) * 3 + 1],
+					status[scroll + i], i, i == choice);
+		    }
+		}
+		wnoutrefresh (list);
+		wmove (dialog, cur_y, cur_x);
+		wrefresh (dialog);
+            
+		for (i = 0; i < item_no; i++) {
+		    if (status[i]) {
+			if (flag == FLAG_CHECK) {
+			    if (separate_output) {
+				fprintf (stderr, "%s\n", items[i * 3]);
+			    } else {
+				fprintf (stderr, "\"%s\" ", items[i * 3]);
+			    }
+			} else {
+			    fprintf (stderr, "%s", items[i * 3]);
+			}
+
+		    }
+		}
+            }
+	    delwin (dialog);
+	    free (status);
+	    return button;
+	case 'X':
+	case 'x':
+	    key = ESC;
+	case ESC:
+	    break;
+	}
+    }
+
+    delwin (dialog);
+    free (status);
+    return -1;			/* ESC pressed */
+}