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

• Lines: 330
• Date: Wed Feb 7 09:47:28 1996
• Orig file: v1.3.59/linux/scripts/lxdialog/menubox.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.59/linux/scripts/lxdialog/menubox.c linux/scripts/lxdialog/menubox.c
@@ -0,0 +1,329 @@
+/*
+ *  menubox.c -- implements the menu box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@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 menu_width, item_x;
+
+/*
+ * Print menu item
+ */
+static void
+print_item (WINDOW * win, const char *item, int choice, int selected)
+{
+    int j, i;
+
+    j = first_alpha(item);
+
+    /* Clear 'residue' of last item */
+    wattrset (win, menubox_attr);
+    wmove (win, choice, 0);
+    for (i = 0; i < menu_width; i++)
+	waddch (win, ' ');
+    wattrset (win, selected ? item_selected_attr : item_attr);
+    mvwaddstr (win, choice, item_x, (char *)item);
+    wattrset (win, selected ? tag_key_selected_attr : tag_key_attr);
+    mvwaddch(win, choice, item_x+j, item[j]);
+}
+
+/*
+ * 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 *win, int height, int width,
+		int okval, int exitval, int cancelval)
+{
+    int x = width / 2 - 16;
+    int y = height - 2;
+
+    print_button (win, "Select", y, x, okval);
+    print_button (win, " Exit ", y, x + 12, exitval);
+    print_button (win, " Help ", y, x + 24, cancelval);
+
+    wrefresh (win);
+}
+
+/*
+ * Display a menu for choosing among a number of options
+ */
+int
+dialog_menu (const char *title, const char *prompt, int height, int width,
+		int menu_height, const char *current, int item_no,
+		const char * const * items)
+
+{
+    int i, j, x, y, cur_x, cur_y, box_x, box_y;
+    int key = 0, button = 0, scroll = 0, choice = 0, first_item = 0, max_choice;
+    WINDOW *dialog, *menu;
+
+    max_choice = MIN (menu_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);
+
+    menu_width = width - 6;
+    getyx (dialog, cur_y, cur_x);
+    box_y = height - menu_height - 5;
+    box_x = (width - menu_width) / 2 - 1;
+
+    /* create new window for the menu */
+    menu = subwin (dialog, menu_height, menu_width,
+		y + box_y + 1, x + box_x + 1);
+    keypad (menu, TRUE);
+
+    /* draw a box around the menu items */
+    draw_box (dialog, box_y, box_x, menu_height + 2, menu_width + 2,
+	      menubox_border_attr, menubox_attr);
+
+    /*
+     * Find length of longest item in order to center menu.
+     * Set 'choice' to default item. 
+     */
+    item_x = 0;
+    for (i = 0; i < item_no; i++) {
+	item_x = MAX (item_x, strlen (items[i * 2 + 1]) + 2);
+	if (strcmp(current, items[i*2]) == 0) choice = i;
+    }
+
+    item_x = (menu_width - item_x) / 2;
+
+    if (choice >= max_choice){
+	scroll = first_item = choice - max_choice + 1;
+	choice = max_choice-1;
+    }
+
+    /* Print the menu */
+    for (i=0; i < max_choice; i++)
+	print_item (menu, items[(first_item + i) * 2 + 1], i, i == choice);
+
+    wnoutrefresh (menu);
+
+    print_arrows(dialog, choice, item_no, scroll,
+		 box_y, box_x+item_x+1, menu_height);
+
+    print_buttons (dialog, height, width, TRUE, FALSE, FALSE);
+
+    while (key != ESC) {
+	key = wgetch (dialog);
+
+        for (i = choice+1; i < max_choice; i++) {
+		j = first_alpha(items[(scroll+i)*2+1]);
+		if (toupper(key) == toupper(items[(scroll+i)*2+1][j]))
+                	break;
+	}
+	if (i == max_choice)
+       		for (i = 0; i < max_choice; i++) {
+			j = first_alpha(items[(scroll+i)*2+1]);
+			if (toupper(key) == toupper(items[(scroll+i)*2+1][j]))
+                		break;
+		}
+
+	if (i < max_choice || key == KEY_UP || key == KEY_DOWN || key == '-' || key == '+') {
+	    if (key == KEY_UP || key == '-') {
+		if (choice == 0) {
+		    if (scroll) {
+
+			/* Scroll menu down */
+			getyx (dialog, cur_y, cur_x);
+
+			if (menu_height > 1) {
+			    /* De-highlight current first item */
+			    print_item (menu, items[scroll * 2 + 1],
+					0, FALSE);
+			    scrollok (menu, TRUE);
+			    wscrl (menu, -1);
+			    scrollok (menu, FALSE);
+			}
+			scroll--;
+			print_item (menu, items[scroll * 2 + 1], 0, TRUE);
+			wnoutrefresh (menu);
+
+    			print_arrows(dialog, choice, item_no, scroll,
+		 			box_y, box_x+item_x+1, menu_height);
+
+			wmove (dialog, cur_y, cur_x);
+		    }
+		    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) {
+			/* Scroll menu up */
+			getyx (dialog, cur_y, cur_x);
+			if (menu_height > 1) {
+			    /* De-highlight current last item */
+			    print_item (menu, items[(scroll + max_choice - 1)
+					   * 2 + 1], max_choice - 1, FALSE);
+			    scrollok (menu, TRUE);
+			    scroll (menu);
+			    scrollok (menu, FALSE);
+			}
+			scroll++;
+			print_item (menu, 
+				    items[(scroll + max_choice - 1) * 2 + 1],
+				    max_choice - 1, TRUE);
+			wnoutrefresh (menu);
+
+    			print_arrows(dialog, choice, item_no, scroll,
+		 			box_y, box_x+item_x+1, menu_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);	/* Save cursor position */
+		print_item (menu, items[(scroll + choice) * 2 + 1],
+				choice, FALSE);
+
+		/* Highlight new item */
+		choice = i;
+		print_item (menu, items[(scroll + choice) * 2 + 1],
+				choice, TRUE);
+		wnoutrefresh (menu);
+		wmove (dialog, cur_y, cur_x);
+		wrefresh (dialog);
+	    }
+	    continue;		/* wait for another key press */
+	}
+
+	switch (key) {
+	case TAB:
+	case KEY_LEFT:
+	case KEY_RIGHT:
+	    switch (button) {
+	    case 0:
+		button = 1;
+		print_buttons(dialog, height, width, FALSE, TRUE, FALSE);
+		break;
+	    case 1:
+		button = 2;
+		print_buttons(dialog, height, width, FALSE, FALSE, TRUE);
+		break;
+	    case 2:
+		button = 0;
+		print_buttons(dialog, height, width, TRUE, FALSE, FALSE);
+		break;
+	    }
+	    wrefresh (dialog);
+	    break;
+	case ' ':
+	case 'S':
+	case 's':
+	    delwin (dialog);
+            fprintf(stderr, items[(scroll + choice) * 2]);
+	    return 0;
+	case 'H':
+	case 'h':
+	case '?':
+	    button = 2;
+	case '\n':
+	    delwin (dialog);
+	    if (button == 2) 
+            	fprintf(stderr, "\"%s\" %s", 
+			items[(scroll + choice) * 2 + 1] +
+			first_alpha(items[(scroll + choice) * 2 + 1]),
+			items[(scroll + choice) * 2]);
+	    else
+            	fprintf(stderr, items[(scroll + choice) * 2]);
+
+	    return button;
+	case 'E':
+	case 'e':
+	case 'X':
+	case 'x':
+	    key = ESC;
+	case ESC:
+	    break;
+	}
+    }
+
+    delwin (dialog);
+    return -1;			/* ESC pressed */
+}