akaros/scripts/kconfig/lxdialog/inputbox.c
<<
>>
Prefs
   1/*
   2 *  inputbox.c -- implements the input box
   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 "dialog.h"
  23
  24char dialog_input_result[MAX_LEN + 1];
  25
  26/*
  27 *  Print the termination buttons
  28 */
  29static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  30{
  31        int x = width / 2 - 11;
  32        int y = height - 2;
  33
  34        print_button(dialog, gettext("  Ok  "), y, x, selected == 0);
  35        print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
  36
  37        wmove(dialog, y, x + 1 + 14 * selected);
  38        wrefresh(dialog);
  39}
  40
  41/*
  42 * Display a dialog box for inputing a string
  43 */
  44int dialog_inputbox(const char *title, const char *prompt, int height, int width,
  45                    const char *init)
  46{
  47        int i, x, y, box_y, box_x, box_width;
  48        int input_x = 0, scroll = 0, key = 0, button = -1;
  49        char *instr = dialog_input_result;
  50        WINDOW *dialog;
  51
  52        if (!init)
  53                instr[0] = '\0';
  54        else
  55                strcpy(instr, init);
  56
  57do_resize:
  58        if (getmaxy(stdscr) <= (height - 2))
  59                return -ERRDISPLAYTOOSMALL;
  60        if (getmaxx(stdscr) <= (width - 2))
  61                return -ERRDISPLAYTOOSMALL;
  62
  63        /* center dialog box on screen */
  64        x = (COLS - width) / 2;
  65        y = (LINES - height) / 2;
  66
  67        draw_shadow(stdscr, y, x, height, width);
  68
  69        dialog = newwin(height, width, y, x);
  70        keypad(dialog, TRUE);
  71
  72        draw_box(dialog, 0, 0, height, width,
  73                 dlg.dialog.atr, dlg.border.atr);
  74        wattrset(dialog, dlg.border.atr);
  75        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  76        for (i = 0; i < width - 2; i++)
  77                waddch(dialog, ACS_HLINE);
  78        wattrset(dialog, dlg.dialog.atr);
  79        waddch(dialog, ACS_RTEE);
  80
  81        print_title(dialog, title, width);
  82
  83        wattrset(dialog, dlg.dialog.atr);
  84        print_autowrap(dialog, prompt, width - 2, 1, 3);
  85
  86        /* Draw the input field box */
  87        box_width = width - 6;
  88        getyx(dialog, y, x);
  89        box_y = y + 2;
  90        box_x = (width - box_width) / 2;
  91        draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
  92                 dlg.dialog.atr, dlg.border.atr);
  93
  94        print_buttons(dialog, height, width, 0);
  95
  96        /* Set up the initial value */
  97        wmove(dialog, box_y, box_x);
  98        wattrset(dialog, dlg.inputbox.atr);
  99
 100        input_x = strlen(instr);
 101
 102        if (input_x >= box_width) {
 103                scroll = input_x - box_width + 1;
 104                input_x = box_width - 1;
 105                for (i = 0; i < box_width - 1; i++)
 106                        waddch(dialog, instr[scroll + i]);
 107        } else {
 108                waddstr(dialog, instr);
 109        }
 110
 111        wmove(dialog, box_y, box_x + input_x);
 112
 113        wrefresh(dialog);
 114
 115        while (key != KEY_ESC) {
 116                key = wgetch(dialog);
 117
 118                if (button == -1) {     /* Input box selected */
 119                        switch (key) {
 120                        case TAB:
 121                        case KEY_UP:
 122                        case KEY_DOWN:
 123                                break;
 124                        case KEY_LEFT:
 125                                continue;
 126                        case KEY_RIGHT:
 127                                continue;
 128                        case KEY_BACKSPACE:
 129                        case 127:
 130                                if (input_x || scroll) {
 131                                        wattrset(dialog, dlg.inputbox.atr);
 132                                        if (!input_x) {
 133                                                scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
 134                                                wmove(dialog, box_y, box_x);
 135                                                for (i = 0; i < box_width; i++)
 136                                                        waddch(dialog,
 137                                                               instr[scroll + input_x + i] ?
 138                                                               instr[scroll + input_x + i] : ' ');
 139                                                input_x = strlen(instr) - scroll;
 140                                        } else
 141                                                input_x--;
 142                                        instr[scroll + input_x] = '\0';
 143                                        mvwaddch(dialog, box_y, input_x + box_x, ' ');
 144                                        wmove(dialog, box_y, input_x + box_x);
 145                                        wrefresh(dialog);
 146                                }
 147                                continue;
 148                        default:
 149                                if (key < 0x100 && isprint(key)) {
 150                                        if (scroll + input_x < MAX_LEN) {
 151                                                wattrset(dialog, dlg.inputbox.atr);
 152                                                instr[scroll + input_x] = key;
 153                                                instr[scroll + input_x + 1] = '\0';
 154                                                if (input_x == box_width - 1) {
 155                                                        scroll++;
 156                                                        wmove(dialog, box_y, box_x);
 157                                                        for (i = 0; i < box_width - 1; i++)
 158                                                                waddch(dialog, instr [scroll + i]);
 159                                                } else {
 160                                                        wmove(dialog, box_y, input_x++ + box_x);
 161                                                        waddch(dialog, key);
 162                                                }
 163                                                wrefresh(dialog);
 164                                        } else
 165                                                flash();        /* Alarm user about overflow */
 166                                        continue;
 167                                }
 168                        }
 169                }
 170                switch (key) {
 171                case 'O':
 172                case 'o':
 173                        delwin(dialog);
 174                        return 0;
 175                case 'H':
 176                case 'h':
 177                        delwin(dialog);
 178                        return 1;
 179                case KEY_UP:
 180                case KEY_LEFT:
 181                        switch (button) {
 182                        case -1:
 183                                button = 1;     /* Indicates "Help" button is selected */
 184                                print_buttons(dialog, height, width, 1);
 185                                break;
 186                        case 0:
 187                                button = -1;    /* Indicates input box is selected */
 188                                print_buttons(dialog, height, width, 0);
 189                                wmove(dialog, box_y, box_x + input_x);
 190                                wrefresh(dialog);
 191                                break;
 192                        case 1:
 193                                button = 0;     /* Indicates "OK" button is selected */
 194                                print_buttons(dialog, height, width, 0);
 195                                break;
 196                        }
 197                        break;
 198                case TAB:
 199                case KEY_DOWN:
 200                case KEY_RIGHT:
 201                        switch (button) {
 202                        case -1:
 203                                button = 0;     /* Indicates "OK" button is selected */
 204                                print_buttons(dialog, height, width, 0);
 205                                break;
 206                        case 0:
 207                                button = 1;     /* Indicates "Help" button is selected */
 208                                print_buttons(dialog, height, width, 1);
 209                                break;
 210                        case 1:
 211                                button = -1;    /* Indicates input box is selected */
 212                                print_buttons(dialog, height, width, 0);
 213                                wmove(dialog, box_y, box_x + input_x);
 214                                wrefresh(dialog);
 215                                break;
 216                        }
 217                        break;
 218                case ' ':
 219                case '\n':
 220                        delwin(dialog);
 221                        return (button == -1 ? 0 : button);
 222                case 'X':
 223                case 'x':
 224                        key = KEY_ESC;
 225                        break;
 226                case KEY_ESC:
 227                        key = on_key_esc(dialog);
 228                        break;
 229                case KEY_RESIZE:
 230                        delwin(dialog);
 231                        on_key_resize();
 232                        goto do_resize;
 233                }
 234        }
 235
 236        delwin(dialog);
 237        return KEY_ESC;         /* ESC pressed */
 238}
 239