release/src/router/libncurses/c++/cursesw.cc

   1 // * this is for making emacs happy: -*-Mode: C++;-*-
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  29
  30 /*
  31  * Authors:
  32  *      Thomas E. Dickey
  33  *      Juergen Pfeifer
  34  *
  35  * The NCursesWindow class was originally based on a file written by
  36  * Eric Newton, later modified by Ulrich Drepper and Anatoly Ivasyuk.
  37  * However, aside from the compatible interface definition, no trace
  38  * of the original code remains in this version: it consists only of
  39  * changes introduced since 1995.
  40  */
  41
  42 #include "internal.h"
  43 #include "cursesw.h"
  44
  45 MODULE_ID("$Id: cursesw.cc,v 1.54 2014/02/01 22:10:42 tom Exp $")
  46
  47 #define COLORS_NEED_INITIALIZATION  -1
  48 #define COLORS_NOT_INITIALIZED       0
  49 #define COLORS_MONOCHROME            1
  50 #define COLORS_ARE_REALLY_THERE      2
  51
  52 #define HaveColors() (colorInitialized == COLORS_ARE_REALLY_THERE)
  53
  54 // declare static variables for the class
  55 long NCursesWindow::count = 0L;
  56 bool NCursesWindow::b_initialized = FALSE;
  57
  58 int
  59 NCursesWindow::scanw(const char* fmt, ...)
  60 {
  61     int result = ERR;
  62
  63     va_list args;
  64     va_start(args, fmt);
  65     result = ::vw_scanw (w, const_cast<NCURSES_CONST char *>(fmt), args);
  66     va_end(args);
  67
  68     return result;
  69 }
  70
  71
  72 int
  73 NCursesWindow::scanw(int y, int x, const char* fmt, ...)
  74 {
  75     int result = ERR;
  76
  77     if (::wmove(w, y, x) != ERR) {
  78         va_list args;
  79         va_start(args, fmt);
  80         result = ::vw_scanw (w, const_cast<NCURSES_CONST char *>(fmt), args);
  81         va_end(args);
  82     }
  83     return result;
  84 }
  85
  86
  87 int
  88 NCursesWindow::scanw(const char* fmt, va_list args)
  89 {
  90     int result = ERR;
  91
  92     result = ::vw_scanw (w, const_cast<NCURSES_CONST char *>(fmt), args);
  93
  94     return result;
  95 }
  96
  97
  98 int
  99 NCursesWindow::scanw(int y, int x, const char* fmt, va_list args)
 100 {
 101     int result = ERR;
 102
 103     if (::wmove(w, y, x) != ERR) {
 104         result = ::vw_scanw (w, const_cast<NCURSES_CONST char *>(fmt), args);
 105     }
 106     return result;
 107 }
 108
 109
 110 int
 111 NCursesWindow::printw(const char * fmt, ...)
 112 {
 113     va_list args;
 114     va_start(args, fmt);
 115     int result = ::vw_printw(w, fmt, args);
 116     va_end(args);
 117     return result;
 118 }
 119
 120
 121 int
 122 NCursesWindow::printw(int y, int x, const char * fmt, ...)
 123 {
 124     va_list args;
 125     va_start(args, fmt);
 126     int result = ::wmove(w, y, x);
 127     if (result == OK) {
 128         result = ::vw_printw(w, fmt, args);
 129     }
 130     va_end(args);
 131     return result;
 132 }
 133
 134
 135 int
 136 NCursesWindow::printw(const char * fmt, va_list args)
 137 {
 138     int result = ::vw_printw(w, fmt, args);
 139     return result;
 140 }
 141
 142
 143 int
 144 NCursesWindow::printw(int y, int x, const char * fmt, va_list args)
 145 {
 146     int result = ::wmove(w, y, x);
 147     if (result == OK) {
 148         result = ::vw_printw(w, fmt, args);
 149     }
 150     return result;
 151 }
 152
 153
 154 void
 155 NCursesWindow::set_keyboard(void)
 156 {
 157     keypad(TRUE);
 158     meta(TRUE);
 159 }
 160
 161 void
 162 NCursesWindow::err_handler(const char *msg) const THROWS(NCursesException)
 163 {
 164   THROW(new NCursesException(msg));
 165 }
 166
 167 void
 168 NCursesWindow::initialize()
 169 {
 170     if (!b_initialized) {
 171         ::initscr();
 172         b_initialized = TRUE;
 173         if (colorInitialized == COLORS_NEED_INITIALIZATION) {
 174             colorInitialized = COLORS_NOT_INITIALIZED;
 175             useColors();
 176         }
 177         ::noecho();
 178         ::cbreak();
 179     }
 180 }
 181
 182 void
 183 NCursesWindow::constructing()
 184 {
 185     initialize();
 186     ++count;
 187 }
 188
 189 NCursesWindow::NCursesWindow()
 190   : w(0), alloced(FALSE), par(0), subwins(0), sib(0)
 191 {
 192     constructing();
 193
 194     w = static_cast<WINDOW *>(0);
 195 }
 196
 197 NCursesWindow::NCursesWindow(int nlines, int ncols, int begin_y, int begin_x)
 198   : w(0), alloced(TRUE), par(0), subwins(0), sib(0)
 199 {
 200     constructing();
 201
 202     w = ::newwin(nlines, ncols, begin_y, begin_x);
 203     if (w == 0) {
 204         err_handler("Cannot construct window");
 205     }
 206     set_keyboard();
 207 }
 208
 209 NCursesWindow::NCursesWindow(WINDOW* window)
 210   : w(0), alloced(FALSE), par(0), subwins(0), sib(0)
 211 {
 212     constructing();
 213
 214     // We used to use a reference on the "window" parameter, but we cannot do
 215     // that with an opaque pointer (see NCURSES_OPAQUE).  If the parameter was
 216     // "::stdscr", that is first set via the "constructing() call, and is null
 217     // up to that point.  So we allow a null pointer here as meaning the "same"
 218     // as "::stdscr".
 219     w = window ? window : ::stdscr;
 220     set_keyboard();
 221 }
 222
 223 NCursesWindow::NCursesWindow(NCursesWindow& win, int ny, int nx,
 224                              int begin_y, int begin_x, char absrel)
 225   : w(0), alloced(TRUE), par(0), subwins(0), sib(0)
 226 {
 227     constructing();
 228     if (absrel == 'a') {        // absolute origin
 229         begin_y -= win.begy();
 230         begin_x -= win.begx();
 231     }
 232
 233     // Link this window into its parent's list of subwindows.
 234     // We use derwin(), since this also works for pads.
 235     w = ::derwin(win.w, ny, nx, begin_y, begin_x);
 236     if (w == 0) {
 237         err_handler("Cannot construct subwindow");
 238     }
 239
 240     par = &win;
 241     sib = win.subwins;
 242     win.subwins = this;
 243 }
 244
 245 NCursesWindow::NCursesWindow(NCursesWindow& win,
 246                                 bool do_box NCURSES_PARAM_INIT(TRUE))
 247   : w(0), alloced(TRUE), par(0), subwins(0), sib(0)
 248 {
 249     constructing();
 250     int myHeight = win.height();
 251     int myWidth  = win.width();
 252     w = :: derwin(win.w, myHeight - 2, myWidth - 2, 1, 1);
 253     if (w == 0) {
 254         err_handler("Cannot construct subwindow");
 255     }
 256
 257     par = &win;
 258     sib = win.subwins;
 259     win.subwins = this;
 260     subwins = 0;
 261
 262     if (do_box) {
 263         win.box();
 264         win.touchwin();
 265     }
 266 }
 267
 268 NCursesWindow NCursesWindow::Clone()
 269 {
 270     WINDOW *d = ::dupwin(w);
 271     NCursesWindow W(d);
 272     W.subwins = subwins;
 273     W.sib = sib;
 274     W.par = par;
 275     W.alloced = alloced;
 276     return W;
 277 }
 278
 279 typedef int (*RIPOFFINIT)(NCursesWindow&);
 280 static RIPOFFINIT R_INIT[5];       // There can't be more
 281 static int r_init_idx   = 0;
 282 static RIPOFFINIT* prip = R_INIT;
 283
 284 NCursesWindow::NCursesWindow(WINDOW *win, int ncols)
 285   : w(0), alloced(FALSE), par(0), subwins(0), sib(0)
 286 {
 287     (void) ncols;
 288     initialize();
 289     w = win;
 290 }
 291
 292 int _nc_xx_ripoff_init(WINDOW *w, int ncols)
 293 {
 294     (void) ncols;
 295     int res = ERR;
 296
 297     RIPOFFINIT init = *prip++;
 298     if (init) {
 299         res = init(*(new NCursesWindow(w,ncols)));
 300     }
 301     return res;
 302 }
 303
 304 int NCursesWindow::ripoffline(int ripoff_lines,
 305                               int (*init)(NCursesWindow& win))
 306 {
 307     int code = ::_nc_ripoffline(ripoff_lines,_nc_xx_ripoff_init);
 308     if (code == OK && init && ripoff_lines) {
 309         R_INIT[r_init_idx++] = init;
 310     }
 311     return code;
 312 }
 313
 314 bool
 315 NCursesWindow::isDescendant(NCursesWindow& win)
 316 {
 317     bool result = FALSE;
 318
 319     for (NCursesWindow* p = subwins; p != NULL; p = p->sib) {
 320         if (p == &win || p->isDescendant(win)) {
 321             result = TRUE;
 322             break;
 323         }
 324     }
 325     return result;
 326 }
 327
 328 void
 329 NCursesWindow::kill_subwindows()
 330 {
 331     NCursesWindow* p = subwins;
 332
 333     subwins = 0;
 334     while (p != 0) {
 335         NCursesWindow* q = p->sib;
 336         p->kill_subwindows();
 337         if (p->alloced) {
 338             if (p->w != 0)
 339                 ::delwin(p->w);
 340         }
 341         delete p;
 342         p = q;
 343     }
 344 }
 345
 346
 347 NCursesWindow::~NCursesWindow()
 348 {
 349     kill_subwindows();
 350
 351     if (par != 0) {
 352         // Remove this window from the parent's list of subwindows.
 353         NCursesWindow * next = par->subwins;
 354         NCursesWindow * prev = 0;
 355         while (next != 0) {
 356             if (next == this) {
 357                 if (prev != 0) {
 358                     prev->sib = next->sib;
 359                 } else {
 360                     par->subwins = next->sib;
 361                 }
 362                 break;
 363             }
 364             prev = next;
 365             next = next->sib;
 366         }
 367     }
 368
 369     if (alloced && w != 0)
 370         ::delwin(w);
 371
 372     if (alloced) {
 373         --count;
 374         if (count == 0) {
 375             ::endwin();
 376         } else if (count < 0) { // cannot happen!
 377             err_handler("Too many windows destroyed");
 378         }
 379     }
 380 }
 381
 382 // ---------------------------------------------------------------------
 383 // Color stuff
 384 //
 385 int NCursesWindow::colorInitialized = COLORS_NOT_INITIALIZED;
 386
 387 void
 388 NCursesWindow::useColors(void)
 389 {
 390     if (colorInitialized == COLORS_NOT_INITIALIZED) {
 391         if (b_initialized) {
 392             if (::has_colors()) {
 393                 ::start_color();
 394                 colorInitialized = COLORS_ARE_REALLY_THERE;
 395             } else {
 396                 colorInitialized = COLORS_MONOCHROME;
 397             }
 398         } else {
 399             colorInitialized = COLORS_NEED_INITIALIZATION;
 400         }
 401     }
 402 }
 403
 404 NCURSES_PAIRS_T
 405 NCursesWindow::getPair() const
 406 {
 407     return static_cast<NCURSES_PAIRS_T>(PAIR_NUMBER(getattrs(w)));
 408 }
 409
 410 NCURSES_COLOR_T
 411 NCursesWindow::getcolor(int getback) const
 412 {
 413     NCURSES_COLOR_T fore, back;
 414
 415     if (HaveColors()) {
 416         if (::pair_content(getPair(), &fore, &back) == ERR)
 417             err_handler("Can't get color pair");
 418     } else {
 419         // Monochrome means white on black
 420         back = COLOR_BLACK;
 421         fore = COLOR_WHITE;
 422     }
 423     return getback ? back : fore;
 424 }
 425
 426 int NCursesWindow::NumberOfColors()
 427 {
 428     return (HaveColors()) ? COLORS : 1;
 429 }
 430
 431 NCURSES_PAIRS_T
 432 NCursesWindow::getcolor() const
 433 {
 434     return (HaveColors()) ? getPair() : 0;
 435 }
 436
 437 int
 438 NCursesWindow::setpalette(NCURSES_COLOR_T fore, NCURSES_COLOR_T back, NCURSES_PAIRS_T pair)
 439 {
 440     return (HaveColors()) ? ::init_pair(pair, fore, back) : OK;
 441 }
 442
 443 int
 444 NCursesWindow::setpalette(NCURSES_COLOR_T fore, NCURSES_COLOR_T back)
 445 {
 446     return setpalette(fore, back, getPair());
 447 }
 448
 449
 450 int
 451 NCursesWindow::setcolor(NCURSES_PAIRS_T pair)
 452 {
 453     if (HaveColors()) {
 454         if ((pair < 1) || (pair > COLOR_PAIRS))
 455             err_handler("Can't set color pair");
 456
 457         attroff(A_COLOR);
 458         attrset(COLOR_PAIR(pair));
 459     }
 460     return OK;
 461 }
 462
 463 #if HAVE_HAS_KEY
 464 bool NCursesWindow::has_mouse() const
 465 {
 466     return ((::has_key(KEY_MOUSE) || ::has_mouse())
 467              ? TRUE : FALSE);
 468 }
 469 #endif