contrib/dialog/msgbox.c

   1 /*
   2  *  $Id: msgbox.c,v 1.81 2018/06/21 23:29:59 tom Exp $
   3  *
   4  *  msgbox.c -- implements the message box and info box
   5  *
   6  *  Copyright 2000-2012,2018    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, last = 0, page;
  49     int button;
  50     int key = 0, 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     int check;
  57     bool show = TRUE;
  58     int min_width = (pauseopt == 1 ? 12 : 0);
  59     bool save_nocancel = dialog_vars.nocancel;
  60 #ifdef KEY_RESIZE
  61     int req_high;
  62     int req_wide;
  63 #endif
  64
  65     DLG_TRACE(("# msgbox args:\n"));
  66     DLG_TRACE2S("title", title);
  67     DLG_TRACE2S("message", cprompt);
  68     DLG_TRACE2N("height", height);
  69     DLG_TRACE2N("width", width);
  70     DLG_TRACE2N("pauseopt", pauseopt);
  71
  72     dialog_vars.nocancel = TRUE;
  73     button = dlg_default_button();
  74
  75 #ifdef KEY_RESIZE
  76     req_high = height;
  77     req_wide = width;
  78   restart:
  79 #endif
  80
  81     dlg_button_layout(buttons, &min_width);
  82
  83     prompt = dlg_strclone(cprompt);
  84     dlg_tab_correct_str(prompt);
  85     dlg_auto_size(title, prompt, &height, &width,
  86                   (pauseopt == 1 ? 2 : 0),
  87                   min_width);
  88     dlg_print_size(height, width);
  89     dlg_ctl_size(height, width);
  90
  91     x = dlg_box_x_ordinate(width);
  92     y = dlg_box_y_ordinate(height);
  93
  94 #ifdef KEY_RESIZE
  95     if (dialog != 0)
  96         dlg_move_window(dialog, height, width, y, x);
  97     else
  98 #endif
  99     {
 100         dialog = dlg_new_window(height, width, y, x);
 101         dlg_register_window(dialog, "msgbox", binding);
 102         dlg_register_buttons(dialog, "msgbox", buttons);
 103     }
 104     page = height - (1 + 3 * MARGIN);
 105
 106     dlg_mouse_setbase(x, y);
 107
 108     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 109     dlg_draw_title(dialog, title);
 110
 111     dlg_attrset(dialog, dialog_attr);
 112
 113     if (pauseopt) {
 114         dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 115         mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
 116         dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
 117         dlg_draw_helpline(dialog, FALSE);
 118
 119         while (result == DLG_EXIT_UNKNOWN) {
 120             if (show) {
 121                 last = dlg_print_scrolled(dialog, prompt, offset,
 122                                           page, width, pauseopt);
 123                 dlg_trace_win(dialog);
 124                 show = FALSE;
 125             }
 126             key = dlg_mouse_wgetch(dialog, &fkey);
 127             if (dlg_result_key(key, fkey, &result))
 128                 break;
 129
 130             if (!fkey && (check = dlg_char_to_button(key, buttons)) >= 0) {
 131                 result = dlg_ok_buttoncode(check);
 132                 break;
 133             }
 134
 135             if (fkey) {
 136                 switch (key) {
 137 #ifdef KEY_RESIZE
 138                 case KEY_RESIZE:
 139                     dlg_will_resize(dialog);
 140                     dlg_clear();
 141                     free(prompt);
 142                     height = req_high;
 143                     width = req_wide;
 144                     show = TRUE;
 145                     goto restart;
 146 #endif
 147                 case DLGK_FIELD_NEXT:
 148                     button = dlg_next_button(buttons, button);
 149                     if (button < 0)
 150                         button = 0;
 151                     dlg_draw_buttons(dialog,
 152                                      height - 2, 0,
 153                                      buttons, button,
 154                                      FALSE, width);
 155                     break;
 156                 case DLGK_FIELD_PREV:
 157                     button = dlg_prev_button(buttons, button);
 158                     if (button < 0)
 159                         button = 0;
 160                     dlg_draw_buttons(dialog,
 161                                      height - 2, 0,
 162                                      buttons, button,
 163                                      FALSE, width);
 164                     break;
 165                 case DLGK_ENTER:
 166                     result = dlg_ok_buttoncode(button);
 167                     break;
 168                 default:
 169                     if (is_DLGK_MOUSE(key)) {
 170                         result = dlg_ok_buttoncode(key - M_EVENT);
 171                         if (result < 0)
 172                             result = DLG_EXIT_OK;
 173                     } else if (dlg_check_scrolled(key,
 174                                                   last,
 175                                                   page,
 176                                                   &show,
 177                                                   &offset) == 0) {
 178                     } else {
 179                         beep();
 180                     }
 181                     break;
 182                 }
 183             } else {
 184                 beep();
 185             }
 186         }
 187     } else {
 188         dlg_print_scrolled(dialog, prompt, offset, page, width, pauseopt);
 189         dlg_draw_helpline(dialog, FALSE);
 190         wrefresh(dialog);
 191         dlg_trace_win(dialog);
 192         result = DLG_EXIT_OK;
 193     }
 194
 195     dlg_del_window(dialog);
 196     dlg_mouse_free_regions();
 197     free(prompt);
 198
 199     dialog_vars.nocancel = save_nocancel;
 200
 201     return result;
 202 }