contrib/dialog/msgbox.c

   1 /*
   2  *  $Id: msgbox.c,v 1.89 2020/11/23 00:32:02 tom Exp $
   3  *
   4  *  msgbox.c -- implements the message box and info box
   5  *
   6  *  Copyright 2000-2019,2020    Thomas E. Dickey
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU Lesser General Public License, version 2.1
  10  *  as published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Lesser General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Lesser General Public
  18  *  License along with this program; if not, write to
  19  *      Free Software Foundation, Inc.
  20  *      51 Franklin St., Fifth Floor
  21  *      Boston, MA 02110, USA.
  22  *
  23  *  An earlier version of this program lists as authors:
  24  *      Savio Lam (lam836@cs.cuhk.hk)
  25  */
  26
  27 #include <dialog.h>
  28 #include <dlg_keys.h>
  29
  30 /*
  31  * Display a message box. Program will pause and display an "OK" button
  32  * if the parameter 'pauseopt' is non-zero.
  33  */
  34 int
  35 dialog_msgbox(const char *title, const char *cprompt, int height, int width,
  36               int pauseopt)
  37 {
  38     /* *INDENT-OFF* */
  39     static DLG_KEYS_BINDING binding[] = {
  40         HELPKEY_BINDINGS,
  41         ENTERKEY_BINDINGS,
  42         SCROLLKEY_BINDINGS,
  43         TRAVERSE_BINDINGS,
  44         END_KEYS_BINDING
  45     };
  46     /* *INDENT-ON* */
  47
  48     int x, y, page;
  49     int button;
  50     int key, fkey;
  51     int result = DLG_EXIT_UNKNOWN;
  52     WINDOW *dialog = 0;
  53     char *prompt;
  54     const char **buttons = dlg_ok_label();
  55     int offset = 0;
  56     bool show = TRUE;
  57     int min_width = (pauseopt == 1 ? 12 : 0);
  58     bool save_nocancel = dialog_vars.nocancel;
  59 #ifdef KEY_RESIZE
  60     int req_high;
  61     int req_wide;
  62 #endif
  63
  64     DLG_TRACE(("# msgbox args:\n"));
  65     DLG_TRACE2S("title", title);
  66     DLG_TRACE2S("message", cprompt);
  67     DLG_TRACE2N("height", height);
  68     DLG_TRACE2N("width", width);
  69     DLG_TRACE2N("pauseopt", pauseopt);
  70
  71     dialog_vars.nocancel = TRUE;
  72     button = dlg_default_button();
  73
  74 #ifdef KEY_RESIZE
  75     req_high = height;
  76     req_wide = width;
  77   restart:
  78 #endif
  79
  80     dlg_button_layout(buttons, &min_width);
  81
  82     prompt = dlg_strclone(cprompt);
  83     dlg_tab_correct_str(prompt);
  84     dlg_auto_size(title, prompt, &height, &width,
  85                   (pauseopt == 1 ? 2 : 0),
  86                   min_width);
  87     dlg_print_size(height, width);
  88     dlg_ctl_size(height, width);
  89
  90     x = dlg_box_x_ordinate(width);
  91     y = dlg_box_y_ordinate(height);
  92
  93     dialog = dlg_new_window(height, width, y, x);
  94     dlg_register_window(dialog, "msgbox", binding);
  95     dlg_register_buttons(dialog, "msgbox", buttons);
  96
  97     page = height - (1 + 3 * MARGIN);
  98
  99     dlg_mouse_setbase(x, y);
 100
 101     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 102     dlg_draw_title(dialog, title);
 103
 104     dlg_attrset(dialog, dialog_attr);
 105
 106     if (pauseopt) {
 107         int last = 0;
 108
 109         dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 110         mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
 111         dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
 112         dlg_draw_helpline(dialog, FALSE);
 113
 114         while (result == DLG_EXIT_UNKNOWN) {
 115             int check;
 116
 117             if (show) {
 118                 last = dlg_print_scrolled(dialog, prompt, offset,
 119                                           page, width, pauseopt);
 120                 dlg_trace_win(dialog);
 121                 show = FALSE;
 122             }
 123             key = dlg_mouse_wgetch(dialog, &fkey);
 124             if (dlg_result_key(key, fkey, &result)) {
 125                 if (!dlg_button_key(result, &button, &key, &fkey))
 126                     break;
 127             }
 128             if (!fkey && (check = dlg_char_to_button(key, buttons)) >= 0) {
 129                 result = dlg_ok_buttoncode(check);
 130                 break;
 131             }
 132
 133             if (fkey) {
 134                 switch (key) {
 135 #ifdef KEY_RESIZE
 136                 case KEY_RESIZE:
 137                     dlg_will_resize(dialog);
 138                     free(prompt);
 139                     height = req_high;
 140                     width = req_wide;
 141                     show = TRUE;
 142                     _dlg_resize_cleanup(dialog);
 143                     goto restart;
 144 #endif
 145                 case DLGK_FIELD_NEXT:
 146                     button = dlg_next_button(buttons, button);
 147                     if (button < 0)
 148                         button = 0;
 149                     dlg_draw_buttons(dialog,
 150                                      height - 2, 0,
 151                                      buttons, button,
 152                                      FALSE, width);
 153                     break;
 154                 case DLGK_FIELD_PREV:
 155                     button = dlg_prev_button(buttons, button);
 156                     if (button < 0)
 157                         button = 0;
 158                     dlg_draw_buttons(dialog,
 159                                      height - 2, 0,
 160                                      buttons, button,
 161                                      FALSE, width);
 162                     break;
 163                 case DLGK_ENTER:
 164                     result = dlg_enter_buttoncode(button);
 165                     break;
 166                 case DLGK_LEAVE:
 167                     result = dlg_ok_buttoncode(button);
 168                     break;
 169                 default:
 170                     if (is_DLGK_MOUSE(key)) {
 171                         result = dlg_ok_buttoncode(key - M_EVENT);
 172                         if (result < 0)
 173                             result = DLG_EXIT_OK;
 174                     } else if (dlg_check_scrolled(key,
 175                                                   last,
 176                                                   page,
 177                                                   &show,
 178                                                   &offset) == 0) {
 179                     } else {
 180                         beep();
 181                     }
 182                     break;
 183                 }
 184             } else if (key > 0) {
 185                 beep();
 186             }
 187         }
 188     } else {
 189         dlg_print_scrolled(dialog, prompt, offset, page, width, pauseopt);
 190         dlg_draw_helpline(dialog, FALSE);
 191         wrefresh(dialog);
 192         dlg_trace_win(dialog);
 193         result = DLG_EXIT_OK;
 194     }
 195     dlg_add_last_key(-1);
 196
 197     dlg_del_window(dialog);
 198     dlg_mouse_free_regions();
 199     free(prompt);
 200
 201     dialog_vars.nocancel = save_nocancel;
 202
 203     return result;
 204 }