misc/confdialog/util.c

   1 /*
   2  * --- T2-COPYRIGHT-NOTE-BEGIN ---
   3  * This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   4  *
   5  * T2 SDE: misc/confdialog/util.c
   6  * Copyright (C) 2004 - 2005 The T2 SDE Project
   7  * Copyright (C) 1998 - 2003 ROCK Linux Project
   8  *
   9  * More information can be found in the files COPYING and README.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; version 2 of the License. A copy of the
  14  * GNU General Public License can be found in the file COPYING.
  15  * --- T2-COPYRIGHT-NOTE-END ---
  16  */
  17 /*
  18  *  util.c
  19  *
  20  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  21  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
  22  *  MODIFIED FOR ROCK LINUX CONFIG BY: Clifford Wolf (clifford@clifford.at)
  23  *
  24  *  This program is free software; you can redistribute it and/or
  25  *  modify it under the terms of the GNU General Public License
  26  *  as published by the Free Software Foundation; either version 2
  27  *  of the License, or (at your option) any later version.
  28  *
  29  *  This program is distributed in the hope that it will be useful,
  30  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  *  GNU General Public License for more details.
  33  *
  34  *  You should have received a copy of the GNU General Public License
  35  *  along with this program; if not, write to the Free Software
  36  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  37  */
  38
  39 #include "dialog.h"
  40
  41
  42 /* use colors by default? */
  43 bool use_colors = 1;
  44
  45 const char *backtitle = NULL;
  46
  47 const char *dialog_result;
  48
  49 /*
  50  * Attribute values, default is for mono display
  51  */
  52 chtype attributes[] =
  53 {
  54     A_NORMAL,                   /* screen_attr */
  55     A_NORMAL,                   /* shadow_attr */
  56     A_NORMAL,                   /* dialog_attr */
  57     A_BOLD,                     /* title_attr */
  58     A_NORMAL,                   /* border_attr */
  59     A_REVERSE,                  /* button_active_attr */
  60     A_DIM,                      /* button_inactive_attr */
  61     A_REVERSE,                  /* button_key_active_attr */
  62     A_BOLD,                     /* button_key_inactive_attr */
  63     A_REVERSE,                  /* button_label_active_attr */
  64     A_NORMAL,                   /* button_label_inactive_attr */
  65     A_NORMAL,                   /* inputbox_attr */
  66     A_NORMAL,                   /* inputbox_border_attr */
  67     A_NORMAL,                   /* searchbox_attr */
  68     A_BOLD,                     /* searchbox_title_attr */
  69     A_NORMAL,                   /* searchbox_border_attr */
  70     A_BOLD,                     /* position_indicator_attr */
  71     A_NORMAL,                   /* menubox_attr */
  72     A_NORMAL,                   /* menubox_border_attr */
  73     A_NORMAL,                   /* item_attr */
  74     A_REVERSE,                  /* item_selected_attr */
  75     A_BOLD,                     /* tag_attr */
  76     A_REVERSE,                  /* tag_selected_attr */
  77     A_BOLD,                     /* tag_key_attr */
  78     A_REVERSE,                  /* tag_key_selected_attr */
  79     A_BOLD,                     /* check_attr */
  80     A_REVERSE,                  /* check_selected_attr */
  81     A_BOLD,                     /* uarrow_attr */
  82     A_BOLD                      /* darrow_attr */
  83 };
  84
  85
  86 #include "colors.h"
  87
  88 /*
  89  * Table of color values
  90  */
  91 int color_table[][3] =
  92 {
  93     {SCREEN_FG, SCREEN_BG, SCREEN_HL},
  94     {SHADOW_FG, SHADOW_BG, SHADOW_HL},
  95     {DIALOG_FG, DIALOG_BG, DIALOG_HL},
  96     {TITLE_FG, TITLE_BG, TITLE_HL},
  97     {BORDER_FG, BORDER_BG, BORDER_HL},
  98     {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},
  99     {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},
 100     {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},
 101     {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG, BUTTON_KEY_INACTIVE_HL},
 102     {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG, BUTTON_LABEL_ACTIVE_HL},
 103     {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,
 104      BUTTON_LABEL_INACTIVE_HL},
 105     {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},
 106     {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},
 107     {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},
 108     {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},
 109     {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},
 110     {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},
 111     {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},
 112     {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},
 113     {ITEM_FG, ITEM_BG, ITEM_HL},
 114     {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},
 115     {TAG_FG, TAG_BG, TAG_HL},
 116     {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},
 117     {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},
 118     {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},
 119     {CHECK_FG, CHECK_BG, CHECK_HL},
 120     {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},
 121     {UARROW_FG, UARROW_BG, UARROW_HL},
 122     {DARROW_FG, DARROW_BG, DARROW_HL},
 123 };                              /* color_table */
 124
 125 /*
 126  * Set window to attribute 'attr'
 127  */
 128 void
 129 attr_clear (WINDOW * win, int height, int width, chtype attr)
 130 {
 131     int i, j;
 132
 133     wattrset (win, attr);
 134     for (i = 0; i < height; i++) {
 135         wmove (win, i, 0);
 136         for (j = 0; j < width; j++)
 137             waddch (win, ' ');
 138     }
 139     touchwin (win);
 140 }
 141
 142 void dialog_clear (void)
 143 {
 144     attr_clear (stdscr, LINES, COLS, screen_attr);
 145     /* Display background title if it exists ... - SLH */
 146     if (backtitle != NULL) {
 147         int i;
 148
 149         wattrset (stdscr, screen_attr);
 150         mvwaddstr (stdscr, 0, 1, (char *)backtitle);
 151         wmove (stdscr, 1, 1);
 152         for (i = 1; i < COLS - 1; i++)
 153             waddch (stdscr, ACS_HLINE);
 154     }
 155     wnoutrefresh (stdscr);
 156 }
 157
 158 /*
 159  * Do some initialization for dialog
 160  */
 161 void
 162 init_dialog (void)
 163 {
 164     initscr ();                 /* Init curses */
 165     keypad (stdscr, TRUE);
 166     cbreak ();
 167     noecho ();
 168
 169
 170     if (use_colors)     /* Set up colors */
 171         color_setup ();
 172
 173
 174     dialog_clear ();
 175 }
 176
 177 /*
 178  * Setup for color display
 179  */
 180 void
 181 color_setup (void)
 182 {
 183     int i;
 184
 185     if (has_colors ()) {        /* Terminal supports color? */
 186         start_color ();
 187
 188         /* Initialize color pairs */
 189         for (i = 0; i < ATTRIBUTE_COUNT; i++)
 190             init_pair (i + 1, color_table[i][0], color_table[i][1]);
 191
 192         /* Setup color attributes */
 193         for (i = 0; i < ATTRIBUTE_COUNT; i++)
 194             attributes[i] = C_ATTR (color_table[i][2], i + 1);
 195     }
 196 }
 197
 198 /*
 199  * End using dialog functions.
 200  */
 201 void
 202 end_dialog (void)
 203 {
 204     endwin ();
 205 }
 206
 207
 208 /*
 209  * Print a string of text in a window, automatically wrap around to the
 210  * next line if the string is too long to fit on one line. Newline
 211  * characters '\n' are replaced by spaces.  We start on a new line
 212  * if there is no room for at least 4 nonblanks following a double-space.
 213  */
 214 void
 215 print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)
 216 {
 217     int newl, cur_x, cur_y;
 218     int i, prompt_len, room, wlen;
 219     char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
 220
 221     strcpy (tempstr, prompt);
 222
 223     prompt_len = strlen(tempstr);
 224
 225     /*
 226      * Remove newlines
 227      */
 228     for(i=0; i<prompt_len; i++) {
 229         if(tempstr[i] == '\n') tempstr[i] = ' ';
 230     }
 231
 232     if (prompt_len <= width - x * 2) {  /* If prompt is short */
 233         wmove (win, y, (width - prompt_len) / 2);
 234         waddstr (win, tempstr);
 235     } else {
 236         cur_x = x;
 237         cur_y = y;
 238         newl = 1;
 239         word = tempstr;
 240         while (word && *word) {
 241             sp = index(word, ' ');
 242             if (sp)
 243                 *sp++ = 0;
 244
 245             /* Wrap to next line if either the word does not fit,
 246                or it is the first word of a new sentence, and it is
 247                short, and the next word does not fit. */
 248             room = width - cur_x;
 249             wlen = strlen(word);
 250             if (wlen > room ||
 251                (newl && wlen < 4 && sp && wlen+1+strlen(sp) > room
 252                      && (!(sp2 = index(sp, ' ')) || wlen+1+(sp2-sp) > room))) {
 253                 cur_y++;
 254                 cur_x = x;
 255             }
 256             wmove (win, cur_y, cur_x);
 257             waddstr (win, word);
 258             getyx (win, cur_y, cur_x);
 259             cur_x++;
 260             if (sp && *sp == ' ') {
 261                 cur_x++;        /* double space */
 262                 while (*++sp == ' ');
 263                 newl = 1;
 264             } else
 265                 newl = 0;
 266             word = sp;
 267         }
 268     }
 269 }
 270
 271 /*
 272  * Print a button
 273  */
 274 void
 275 print_button (WINDOW * win, const char *label, int y, int x, int selected)
 276 {
 277     int i, temp;
 278
 279     wmove (win, y, x);
 280     wattrset (win, selected ? button_active_attr : button_inactive_attr);
 281     waddstr (win, "<");
 282     temp = strspn (label, " ");
 283     label += temp;
 284     wattrset (win, selected ? button_label_active_attr
 285               : button_label_inactive_attr);
 286     for (i = 0; i < temp; i++)
 287         waddch (win, ' ');
 288     wattrset (win, selected ? button_key_active_attr
 289               : button_key_inactive_attr);
 290     waddch (win, label[0]);
 291     wattrset (win, selected ? button_label_active_attr
 292               : button_label_inactive_attr);
 293     waddstr (win, (char *)label + 1);
 294     wattrset (win, selected ? button_active_attr : button_inactive_attr);
 295     waddstr (win, ">");
 296     wmove (win, y, x + temp + 1);
 297 }
 298
 299 /*
 300  * Draw a rectangular box with line drawing characters
 301  */
 302 void
 303 draw_box (WINDOW * win, int y, int x, int height, int width,
 304           chtype box, chtype border)
 305 {
 306     int i, j;
 307
 308     wattrset (win, 0);
 309     for (i = 0; i < height; i++) {
 310         wmove (win, y + i, x);
 311         for (j = 0; j < width; j++)
 312             if (!i && !j)
 313                 waddch (win, border | ACS_ULCORNER);
 314             else if (i == height - 1 && !j)
 315                 waddch (win, border | ACS_LLCORNER);
 316             else if (!i && j == width - 1)
 317                 waddch (win, box | ACS_URCORNER);
 318             else if (i == height - 1 && j == width - 1)
 319                 waddch (win, box | ACS_LRCORNER);
 320             else if (!i)
 321                 waddch (win, border | ACS_HLINE);
 322             else if (i == height - 1)
 323                 waddch (win, box | ACS_HLINE);
 324             else if (!j)
 325                 waddch (win, border | ACS_VLINE);
 326             else if (j == width - 1)
 327                 waddch (win, box | ACS_VLINE);
 328             else
 329                 waddch (win, box | ' ');
 330     }
 331 }
 332
 333 /*
 334  * Draw shadows along the right and bottom edge to give a more 3D look
 335  * to the boxes
 336  */
 337 void
 338 draw_shadow (WINDOW * win, int y, int x, int height, int width)
 339 {
 340     int i;
 341
 342     if (has_colors ()) {        /* Whether terminal supports color? */
 343         wattrset (win, shadow_attr);
 344         wmove (win, y + height, x + 2);
 345         for (i = 0; i < width; i++)
 346             waddch (win, winch (win) & A_CHARTEXT);
 347         for (i = y + 1; i < y + height + 1; i++) {
 348             wmove (win, i, x + width);
 349             waddch (win, winch (win) & A_CHARTEXT);
 350             waddch (win, winch (win) & A_CHARTEXT);
 351         }
 352         wnoutrefresh (win);
 353     }
 354 }
 355
 356 /*
 357  *  Return the position of the first alphabetic character in a string.
 358  */
 359 int
 360 first_alpha(const char *string, const char *exempt)
 361 {
 362         int i, in_paren=0, c;
 363
 364         for (i = 0; i < strlen(string); i++) {
 365                 c = tolower(string[i]);
 366
 367                 if (strchr("<[(", c)) ++in_paren;
 368                 if (strchr(">])", c)) --in_paren;
 369
 370                 if ((! in_paren) && isalpha(c) &&
 371                      strchr(exempt, c) == 0)
 372                         return i;
 373         }
 374
 375         return 0;
 376 }