scripts/config/lxdialog/util.c

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