contrib/dialog/inputbox.c

   1 /*
   2  *  $Id: inputbox.c,v 1.91 2020/03/27 20:25:40 tom Exp $
   3  *
   4  *  inputbox.c -- implements the input 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 <dlg_internals.h>
  28 #include <dlg_keys.h>
  29
  30 #define sTEXT -1
  31
  32 #define NAVIGATE_BINDINGS \
  33         DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_DOWN ), \
  34         DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ), \
  35         DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
  36         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
  37         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ), \
  38         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_UP )
  39
  40 /*
  41  * Display a dialog box for entering a string
  42  */
  43 int
  44 dialog_inputbox(const char *title, const char *cprompt, int height, int width,
  45                 const char *init, const int password)
  46 {
  47     /* *INDENT-OFF* */
  48     static DLG_KEYS_BINDING binding[] = {
  49         HELPKEY_BINDINGS,
  50         ENTERKEY_BINDINGS,
  51         NAVIGATE_BINDINGS,
  52         TOGGLEKEY_BINDINGS,
  53         END_KEYS_BINDING
  54     };
  55     static DLG_KEYS_BINDING binding2[] = {
  56         INPUTSTR_BINDINGS,
  57         HELPKEY_BINDINGS,
  58         ENTERKEY_BINDINGS,
  59         NAVIGATE_BINDINGS,
  60         /* no TOGGLEKEY_BINDINGS, since that includes space... */
  61         END_KEYS_BINDING
  62     };
  63     /* *INDENT-ON* */
  64
  65 #ifdef KEY_RESIZE
  66     int old_height = height;
  67     int old_width = width;
  68 #endif
  69     int xorg, yorg;
  70     int x, y, box_y, box_x, box_width;
  71     int show_buttons;
  72     int col_offset = 0;
  73     int chr_offset = 0;
  74     int key, fkey, code;
  75     int result = DLG_EXIT_UNKNOWN;
  76     int state;
  77     bool first;
  78     bool edited;
  79     char *input;
  80     WINDOW *dialog;
  81     WINDOW *editor;
  82     char *prompt = dlg_strclone(cprompt);
  83     const char **buttons = dlg_ok_labels();
  84
  85     dlg_does_output();
  86
  87     DLG_TRACE(("# inputbox args:\n"));
  88     DLG_TRACE2S("title", title);
  89     DLG_TRACE2S("message", cprompt);
  90     DLG_TRACE2N("height", height);
  91     DLG_TRACE2N("width", width);
  92     DLG_TRACE2S("init", init);
  93     DLG_TRACE2N("password", password);
  94
  95     dlg_tab_correct_str(prompt);
  96
  97     /* Set up the initial value */
  98     input = dlg_set_result(init);
  99     edited = FALSE;
 100
 101 #ifdef KEY_RESIZE
 102   retry:
 103 #endif
 104     show_buttons = TRUE;
 105     state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
 106     first = (state == sTEXT);
 107     key = fkey = 0;
 108
 109     if (init != NULL) {
 110         dlg_auto_size(title, prompt, &height, &width, 5,
 111                       MIN(MAX(dlg_count_columns(init) + 7, 26),
 112                           SCOLS - (dialog_vars.begin_set ?
 113                                    dialog_vars.begin_x : 0)));
 114         chr_offset = (int) strlen(init);
 115     } else {
 116         dlg_auto_size(title, prompt, &height, &width, 5, 26);
 117     }
 118     dlg_button_layout(buttons, &width);
 119     dlg_print_size(height, width);
 120     dlg_ctl_size(height, width);
 121
 122     xorg = dlg_box_x_ordinate(width);
 123     yorg = dlg_box_y_ordinate(height);
 124
 125     dialog = dlg_new_window(height, width, yorg, xorg);
 126     dlg_register_window(dialog, "inputbox", binding);
 127     dlg_register_buttons(dialog, "inputbox", buttons);
 128
 129     dlg_mouse_setbase(xorg, yorg);
 130
 131     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 132     dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 133     dlg_draw_title(dialog, title);
 134
 135     dlg_attrset(dialog, dialog_attr);
 136     dlg_draw_helpline(dialog, FALSE);
 137     dlg_print_autowrap(dialog, prompt, height, width);
 138
 139     /* Draw the input field box */
 140     box_width = width - 6;
 141     getyx(dialog, y, x);
 142     (void) x;
 143     box_y = y + 2;
 144     box_x = (width - box_width) / 2;
 145     dlg_mouse_mkregion(y + 1, box_x - 1, 3, box_width + 2, 'i');
 146     dlg_draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
 147                  border_attr, border2_attr);
 148
 149     /* Make a window for the input-field, to associate bindings */
 150     editor = dlg_sub_window(dialog, 1, box_width, yorg + box_y, xorg + box_x);
 151     dlg_register_window(editor, "inputbox2", binding2);
 152
 153     if (*input != '\0') {
 154         dlg_show_string(editor, input, chr_offset, inputbox_attr,
 155                         0, 0, box_width, (bool) (password != 0), first);
 156         wsyncup(editor);
 157         wcursyncup(editor);
 158     }
 159
 160     while (result == DLG_EXIT_UNKNOWN) {
 161         /*
 162          * The last field drawn determines where the cursor is shown:
 163          */
 164         if (show_buttons) {
 165             show_buttons = FALSE;
 166             col_offset = dlg_edit_offset(input, chr_offset, box_width);
 167             (void) wmove(dialog, box_y, box_x + col_offset);
 168             dlg_draw_buttons(dialog, height - 2, 0, buttons, state, FALSE, width);
 169         }
 170
 171         if (!first) {
 172             if (*input != '\0' && !edited) {
 173                 dlg_show_string(editor, input, chr_offset, inputbox_attr,
 174                                 0, 0, box_width, (bool) (password != 0), first);
 175                 wmove(editor, 0, chr_offset);
 176                 wsyncup(editor);
 177                 wcursyncup(editor);
 178             }
 179             key = dlg_mouse_wgetch((state == sTEXT) ? editor : dialog, &fkey);
 180             if (dlg_result_key(key, fkey, &result)) {
 181                 if (!dlg_button_key(result, &code, &key, &fkey))
 182                     break;
 183             }
 184         }
 185
 186         /*
 187          * Handle mouse clicks first, since we want to know if this is a button,
 188          * or something that dlg_edit_string() should handle.
 189          */
 190         if (fkey
 191             && is_DLGK_MOUSE(key)
 192             && (code = dlg_ok_buttoncode(key - M_EVENT)) >= 0) {
 193             result = code;
 194             continue;
 195         }
 196
 197         if (state == sTEXT) {   /* Input box selected */
 198             int edit = dlg_edit_string(input, &chr_offset, key, fkey, first);
 199
 200             if (edit) {
 201                 dlg_show_string(editor, input, chr_offset, inputbox_attr,
 202                                 0, 0, box_width, (bool) (password != 0), first);
 203                 wsyncup(editor);
 204                 wcursyncup(editor);
 205                 first = FALSE;
 206                 edited = TRUE;
 207                 continue;
 208             } else if (first) {
 209                 first = FALSE;
 210                 continue;
 211             }
 212         }
 213
 214         /* handle non-functionkeys */
 215         if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
 216             dlg_del_window(dialog);
 217             result = dlg_ok_buttoncode(code);
 218             continue;
 219         }
 220
 221         /* handle functionkeys */
 222         if (fkey) {
 223             switch (key) {
 224             case DLGK_MOUSE('i'):       /* mouse enter events */
 225                 state = 0;
 226                 /* FALLTHRU */
 227             case DLGK_FIELD_PREV:
 228                 show_buttons = TRUE;
 229                 state = dlg_prev_ok_buttonindex(state, sTEXT);
 230                 break;
 231             case DLGK_FIELD_NEXT:
 232                 show_buttons = TRUE;
 233                 state = dlg_next_ok_buttonindex(state, sTEXT);
 234                 break;
 235             case DLGK_TOGGLE:
 236             case DLGK_ENTER:
 237                 dlg_del_window(dialog);
 238                 result = (state >= 0) ? dlg_enter_buttoncode(state) : DLG_EXIT_OK;
 239                 break;
 240 #ifdef KEY_RESIZE
 241             case KEY_RESIZE:
 242                 dlg_will_resize(dialog);
 243                 /* reset data */
 244                 height = old_height;
 245                 width = old_width;
 246                 /* repaint */
 247                 _dlg_resize_cleanup(dialog);
 248                 goto retry;
 249 #endif
 250             default:
 251                 beep();
 252                 break;
 253             }
 254         } else if (key > 0) {
 255             beep();
 256         }
 257     }
 258     AddLastKey();
 259
 260     dlg_unregister_window(editor);
 261     dlg_del_window(dialog);
 262     dlg_mouse_free_regions();
 263     free(prompt);
 264     return result;
 265 }