1 files changed, 445 insertions, 0 deletions

diff --git a/scripts/lxdialog/menubox.c b/scripts/lxdialog/menubox.c
new file mode 100644
index 000000000000..91d82ba17f8d
--- /dev/null
+++ b/scripts/lxdialog/menubox.c
@@ -0,0 +1,445 @@
+/*
+ *  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.
+ */
+
+/*
+ *  Changes by Clifford Wolf (god@clifford.at)
+ *
+ *  [ 1998-06-13 ]
+ *
+ *    *)  A bugfix for the Page-Down problem
+ *
+ *    *)  Formerly when I used Page Down and Page Up, the cursor would be set 
+ *        to the first position in the menu box.  Now lxdialog is a bit
+ *        smarter and works more like other menu systems (just have a look at
+ *        it).
+ *
+ *    *)  Formerly if I selected something my scrolling would be broken because
+ *        lxdialog is re-invoked by the Menuconfig shell script, can't
+ *        remember the last scrolling position, and just sets it so that the
+ *        cursor is at the bottom of the box.  Now it writes the temporary file
+ *        lxdialog.scrltmp which contains this information. The file is
+ *        deleted by lxdialog if the user leaves a submenu or enters a new
+ *        one, but it would be nice if Menuconfig could make another "rm -f"
+ *        just to be sure.  Just try it out - you will recognise a difference!
+ *
+ *  [ 1998-06-14 ]
+ *
+ *    *)  Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
+ *        and menus change their size on the fly.
+ *
+ *    *)  If for some reason the last scrolling position is not saved by
+ *        lxdialog, it sets the scrolling so that the selected item is in the
+ *        middle of the menu box, not at the bottom.
+ *
+ * 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
+ * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
+ * This fixes a bug in Menuconfig where using ' ' to descend into menus
+ * would leave mis-synchronized lxdialog.scrltmp files lying around,
+ * fscanf would read in 'scroll', and eventually that value would get used.
+ */
+
+#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 hotkey)
+{
+    int j;
+    char menu_item[menu_width+1];
+
+    strncpy(menu_item, item, menu_width);
+    menu_item[menu_width] = 0;
+    j = first_alpha(menu_item, "YyNnMmHh");
+
+    /* Clear 'residue' of last item */
+    wattrset (win, menubox_attr);
+    wmove (win, choice, 0);
+#if OLD_NCURSES
+    {
+        int i;
+        for (i = 0; i < menu_width; i++)
+            waddch (win, ' ');
+    }
+#else
+    wclrtoeol(win);
+#endif
+    wattrset (win, selected ? item_selected_attr : item_attr);
+    mvwaddstr (win, choice, item_x, menu_item);
+    if (hotkey) {
+        wattrset (win, selected ? tag_key_selected_attr : tag_key_attr);
+        mvwaddch(win, choice, item_x+j, menu_item[j]);
+    }
+    if (selected) {
+        wmove (win, choice, item_x+1);
+        wrefresh (win);
+    }
+}
+
+/*
+ * Print the scroll indicators.
+ */
+static void
+print_arrows (WINDOW * win, int item_no, int scroll,
+                int y, int x, int height)
+{
+    int cur_y, cur_x;
+
+    getyx(win, cur_y, cur_x);
+
+    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 + height < item_no)) {
+        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);
+   }
+
+   wmove(win, cur_y, cur_x);
+}
+
+/*
+ * Display the termination buttons.
+ */
+static void
+print_buttons (WINDOW *win, int height, int width, int selected)
+{
+    int x = width / 2 - 16;
+    int y = height - 2;
+
+    print_button (win, "Select", y, x, selected == 0);
+    print_button (win, " Exit ", y, x + 12, selected == 1);
+    print_button (win, " Help ", y, x + 24, selected == 2);
+
+    wmove(win, y, x+1+12*selected);
+    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, box_x, box_y;
+    int key = 0, button = 0, scroll = 0, choice = 0, first_item = 0, max_choice;
+    WINDOW *dialog, *menu;
+    FILE *f;
+
+    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);
+    wbkgdset (dialog, dialog_attr & A_COLOR);
+    waddch (dialog, ACS_RTEE);
+
+    if (title != NULL && strlen(title) >= width-2 ) {
+        /* truncate long title -- mec */
+        char * title2 = malloc(width-2+1);
+        memcpy( title2, title, width-2 );
+        title2[width-2] = '\0';
+        title = title2;
+    }
+
+    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;
+    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, MIN(menu_width, strlen (items[i * 2 + 1]) + 2));
+        if (strcmp(current, items[i*2]) == 0) choice = i;
+    }
+
+    item_x = (menu_width - item_x) / 2;
+
+    /* get the scroll info from the temp file */
+    if ( (f=fopen("lxdialog.scrltmp","r")) != NULL ) {
+        if ( (fscanf(f,"%d\n",&scroll) == 1) && (scroll <= choice) &&
+             (scroll+max_choice > choice) && (scroll >= 0) &&
+             (scroll+max_choice <= item_no) ) {
+            first_item = scroll;
+            choice = choice - scroll;
+            fclose(f);
+        } else {
+            scroll=0;
+            remove("lxdialog.scrltmp");
+            fclose(f);
+            f=NULL;
+        }
+    }
+    if ( (choice >= max_choice) || (f==NULL && choice >= max_choice/2) ) {
+        if (choice >= item_no-max_choice/2)
+            scroll = first_item = item_no-max_choice;
+        else
+            scroll = first_item = choice - max_choice/2;
+        choice = choice - scroll;
+    }
+
+    /* Print the menu */
+    for (i=0; i < max_choice; i++) {
+        print_item (menu, items[(first_item + i) * 2 + 1], i, i == choice,
+                    (items[(first_item + i)*2][0] != ':'));
+    }
+
+    wnoutrefresh (menu);
+
+    print_arrows(dialog, item_no, scroll,
+                 box_y, box_x+item_x+1, menu_height);
+
+    print_buttons (dialog, height, width, 0);
+    wmove (menu, choice, item_x+1);
+    wrefresh (menu);
+
+    while (key != ESC) {
+        key = wgetch(menu);
+
+        if (key < 256 && isalpha(key)) key = tolower(key);
+
+        if (strchr("ynmh", key))
+                i = max_choice;
+        else {
+        for (i = choice+1; i < max_choice; i++) {
+                j = first_alpha(items[(scroll+i)*2+1], "YyNnMmHh");
+                if (key == tolower(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], "YyNnMmHh");
+                        if (key == tolower(items[(scroll+i)*2+1][j]))
+                                break;
+                }
+        }
+
+        if (i < max_choice || 
+            key == KEY_UP || key == KEY_DOWN ||
+            key == '-' || key == '+' ||
+            key == KEY_PPAGE || key == KEY_NPAGE) {
+
+            print_item (menu, items[(scroll+choice)*2+1], choice, FALSE,
+                       (items[(scroll+choice)*2][0] != ':'));
+
+            if (key == KEY_UP || key == '-') {
+                if (choice < 2 && scroll) {
+                    /* Scroll menu down */
+                    scrollok (menu, TRUE);
+                    wscrl (menu, -1);
+                    scrollok (menu, FALSE);
+
+                    scroll--;
+
+                    print_item (menu, items[scroll * 2 + 1], 0, FALSE,
+                               (items[scroll*2][0] != ':'));
+                } else
+                    choice = MAX(choice - 1, 0);
+
+            } else if (key == KEY_DOWN || key == '+')  {
+
+                print_item (menu, items[(scroll+choice)*2+1], choice, FALSE,
+                                (items[(scroll+choice)*2][0] != ':'));
+
+                if ((choice > max_choice-3) &&
+                    (scroll + max_choice < item_no)
+                   ) {
+                    /* Scroll menu up */
+                    scrollok (menu, TRUE);
+                    wscrl (menu, 1);
+                    scrollok (menu, FALSE);
+
+                    scroll++;
+
+                    print_item (menu, items[(scroll+max_choice-1)*2+1],
+                               max_choice-1, FALSE,
+                               (items[(scroll+max_choice-1)*2][0] != ':'));
+                } else
+                    choice = MIN(choice+1, max_choice-1);
+
+            } else if (key == KEY_PPAGE) {
+                scrollok (menu, TRUE);
+                for (i=0; (i < max_choice); i++) {
+                    if (scroll > 0) {
+                        wscrl (menu, -1);
+                        scroll--;
+                        print_item (menu, items[scroll * 2 + 1], 0, FALSE,
+                        (items[scroll*2][0] != ':'));
+                    } else {
+                        if (choice > 0)
+                            choice--;
+                    }
+                }
+                scrollok (menu, FALSE);
+
+            } else if (key == KEY_NPAGE) {
+                for (i=0; (i < max_choice); i++) {
+                    if (scroll+max_choice < item_no) {
+                        scrollok (menu, TRUE);
+                        wscrl (menu, 1);
+                        scrollok (menu, FALSE);
+                        scroll++;
+                        print_item (menu, items[(scroll+max_choice-1)*2+1],
+                                    max_choice-1, FALSE,
+                                    (items[(scroll+max_choice-1)*2][0] != ':'));
+                    } else {
+                        if (choice+1 < max_choice)
+                            choice++;
+                    }
+                }
+
+            } else
+                choice = i;
+
+            print_item (menu, items[(scroll+choice)*2+1], choice, TRUE,
+                       (items[(scroll+choice)*2][0] != ':'));
+
+            print_arrows(dialog, item_no, scroll,
+                         box_y, box_x+item_x+1, menu_height);
+
+            wnoutrefresh (dialog);
+            wrefresh (menu);
+
+            continue;           /* wait for another key press */
+        }
+
+        switch (key) {
+        case KEY_LEFT:
+        case TAB:
+        case KEY_RIGHT:
+            button = ((key == KEY_LEFT ? --button : ++button) < 0)
+                        ? 2 : (button > 2 ? 0 : button);
+
+            print_buttons(dialog, height, width, button);
+            wrefresh (menu);
+            break;
+        case ' ':
+        case 's':
+        case 'y':
+        case 'n':
+        case 'm':
+        case '/':
+            /* save scroll info */
+            if ( (f=fopen("lxdialog.scrltmp","w")) != NULL ) {
+                fprintf(f,"%d\n",scroll);
+                fclose(f);
+            }
+            delwin (dialog);
+            fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
+            switch (key) {
+            case 's': return 3;
+            case 'y': return 3;
+            case 'n': return 4;
+            case 'm': return 5;
+            case ' ': return 6;
+            case '/': return 7;
+            }
+            return 0;
+        case 'h':
+        case '?':
+            button = 2;
+        case '\n':
+            delwin (dialog);
+            if (button == 2) 
+                fprintf(stderr, "%s \"%s\"\n", 
+                        items[(scroll + choice) * 2],
+                        items[(scroll + choice) * 2 + 1] +
+                        first_alpha(items[(scroll + choice) * 2 + 1],""));
+            else
+                fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
+
+            remove("lxdialog.scrltmp");
+            return button;
+        case 'e':
+        case 'x':
+            key = ESC;
+        case ESC:
+            break;
+        }
+    }
+
+    delwin (dialog);
+    remove("lxdialog.scrltmp");
+    return -1;                  /* ESC pressed */
+}