contrib/dialog/inputbox.c

   1 /*
   2  *  $Id: inputbox.c,v 1.76 2012/12/03 11:46:50 tom Exp $
   3  *
   4  *  inputbox.c -- implements the input box
   5  *
   6  *  Copyright 2000-2011,2012 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 #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         END_KEYS_BINDING
  53     };
  54     static DLG_KEYS_BINDING binding2[] = {
  55         INPUTSTR_BINDINGS,
  56         HELPKEY_BINDINGS,
  57         ENTERKEY_BINDINGS,
  58         NAVIGATE_BINDINGS,
  59         END_KEYS_BINDING
  60     };
  61     /* *INDENT-ON* */
  62
  63 #ifdef KEY_RESIZE
  64     int old_height = height;
  65     int old_width = width;
  66 #endif
  67     int xorg, yorg;
  68     int x, y, box_y, box_x, box_width;
  69     int show_buttons;
  70     int col_offset = 0;
  71     int chr_offset = 0;
  72     int key, fkey, code;
  73     int result = DLG_EXIT_UNKNOWN;
  74     int state;
  75     int first;
  76     int edited;
  77     char *input;
  78     WINDOW *dialog;
  79     WINDOW *editor;
  80     char *prompt = dlg_strclone(cprompt);
  81     const char **buttons = dlg_ok_labels();
  82
  83     dlg_does_output();
  84
  85     dlg_tab_correct_str(prompt);
  86
  87     /* Set up the initial value */
  88     input = dlg_set_result(init);
  89     edited = FALSE;
  90
  91 #ifdef KEY_RESIZE
  92   retry:
  93 #endif
  94     show_buttons = TRUE;
  95     state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
  96     first = (state == sTEXT);
  97     key = fkey = 0;
  98
  99     if (init != NULL) {
 100         dlg_auto_size(title, prompt, &height, &width, 5,
 101                       MIN(MAX(dlg_count_columns(init) + 7, 26),
 102                           SCOLS - (dialog_vars.begin_set ?
 103                                    dialog_vars.begin_x : 0)));
 104         chr_offset = (int) strlen(init);
 105     } else {
 106         dlg_auto_size(title, prompt, &height, &width, 5, 26);
 107     }
 108     dlg_button_layout(buttons, &width);
 109     dlg_print_size(height, width);
 110     dlg_ctl_size(height, width);
 111
 112     xorg = dlg_box_x_ordinate(width);
 113     yorg = dlg_box_y_ordinate(height);
 114
 115     dialog = dlg_new_window(height, width, yorg, xorg);
 116     dlg_register_window(dialog, "inputbox", binding);
 117     dlg_register_buttons(dialog, "inputbox", buttons);
 118
 119     dlg_mouse_setbase(xorg, yorg);
 120
 121     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 122     dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 123     dlg_draw_title(dialog, title);
 124
 125     (void) wattrset(dialog, dialog_attr);
 126     dlg_draw_helpline(dialog, FALSE);
 127     dlg_print_autowrap(dialog, prompt, height, width);
 128
 129     /* Draw the input field box */
 130     box_width = width - 6;
 131     getyx(dialog, y, x);
 132     (void) x;
 133     box_y = y + 2;
 134     box_x = (width - box_width) / 2;
 135     dlg_mouse_mkregion(y + 1, box_x - 1, 3, box_width + 2, 'i');
 136     dlg_draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
 137                  border_attr, border2_attr);
 138
 139     /* Make a window for the input-field, to associate bindings */
 140     editor = dlg_sub_window(dialog, 1, box_width, yorg + box_y, xorg + box_x);
 141     dlg_register_window(editor, "inputbox2", binding2);
 142
 143     if (*input != '\0') {
 144         dlg_show_string(editor, input, chr_offset, inputbox_attr,
 145                         0, 0, box_width, password, first);
 146         wsyncup(editor);
 147         wcursyncup(editor);
 148     }
 149     while (result == DLG_EXIT_UNKNOWN) {
 150         int edit = 0;
 151
 152         /*
 153          * The last field drawn determines where the cursor is shown:
 154          */
 155         if (show_buttons) {
 156             show_buttons = FALSE;
 157             col_offset = dlg_edit_offset(input, chr_offset, box_width);
 158             (void) wmove(dialog, box_y, box_x + col_offset);
 159             dlg_draw_buttons(dialog, height - 2, 0, buttons, state, FALSE, width);
 160         }
 161
 162         if (!first) {
 163             if (*input != '\0' && !edited) {
 164                 dlg_show_string(editor, input, chr_offset, inputbox_attr,
 165                                 0, 0, box_width, password, first);
 166                 wmove(editor, 0, chr_offset);
 167                 wsyncup(editor);
 168                 wcursyncup(editor);
 169             }
 170             key = dlg_mouse_wgetch((state == sTEXT) ? editor : dialog, &fkey);
 171             if (dlg_result_key(key, fkey, &result))
 172                 break;
 173         }
 174
 175         /*
 176          * Handle mouse clicks first, since we want to know if this is a button,
 177          * or something that dlg_edit_string() should handle.
 178          */
 179         if (fkey
 180             && is_DLGK_MOUSE(key)
 181             && (code = dlg_ok_buttoncode(key - M_EVENT)) >= 0) {
 182             result = code;
 183             continue;
 184         }
 185
 186         if (state == sTEXT) {   /* Input box selected */
 187             edit = dlg_edit_string(input, &chr_offset, key, fkey, first);
 188
 189             if (edit) {
 190                 dlg_show_string(editor, input, chr_offset, inputbox_attr,
 191                                 0, 0, box_width, password, first);
 192                 wsyncup(editor);
 193                 wcursyncup(editor);
 194                 first = FALSE;
 195                 edited = TRUE;
 196                 continue;
 197             } else if (first) {
 198                 first = FALSE;
 199                 continue;
 200             }
 201         }
 202
 203         /* handle non-functionkeys */
 204         if (!fkey && (code = dlg_char_to_button(key, buttons)) >= 0) {
 205             dlg_del_window(dialog);
 206             result = dlg_ok_buttoncode(code);
 207             continue;
 208         }
 209
 210         /* handle functionkeys */
 211         if (fkey) {
 212             switch (key) {
 213             case DLGK_MOUSE('i'):       /* mouse enter events */
 214                 state = 0;
 215                 /* FALLTHRU */
 216             case DLGK_FIELD_PREV:
 217                 show_buttons = TRUE;
 218                 state = dlg_prev_ok_buttonindex(state, sTEXT);
 219                 break;
 220             case DLGK_FIELD_NEXT:
 221                 show_buttons = TRUE;
 222                 state = dlg_next_ok_buttonindex(state, sTEXT);
 223                 break;
 224             case ' ':           /* FIXME: conflict with inputstr.c */
 225             case DLGK_ENTER:
 226                 dlg_del_window(dialog);
 227                 result = (state >= 0) ? dlg_enter_buttoncode(state) : DLG_EXIT_OK;
 228                 break;
 229 #ifdef KEY_RESIZE
 230             case KEY_RESIZE:
 231                 /* reset data */
 232                 height = old_height;
 233                 width = old_width;
 234                 /* repaint */
 235                 dlg_clear();
 236                 dlg_del_window(dialog);
 237                 refresh();
 238                 dlg_mouse_free_regions();
 239                 goto retry;
 240 #endif
 241             default:
 242                 beep();
 243                 break;
 244             }
 245         } else {
 246             beep();
 247         }
 248     }
 249
 250     dlg_unregister_window(editor);
 251     dlg_del_window(dialog);
 252     dlg_mouse_free_regions();
 253     free(prompt);
 254     return result;
 255 }