aboutsummaryrefslogtreecommitdiff
path: root/contrib/ncurses/c++/cursesw.cc
blob: 4973e3a715a5ca4658a9d3cb1d7b9563440ca600 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
// * this is for making emacs happy: -*-Mode: C++;-*-

/*
  Copyright (C) 1989 Free Software Foundation
  written by Eric Newton (newton@rocky.oswego.edu)

  This file is part of the GNU C++ Library.  This library is free
  software; you can redistribute it and/or modify it under the terms of
  the GNU Library General Public License as published by the Free
  Software Foundation; either version 2 of the License, or (at your
  option) any later version.  This library is distributed in the hope
  that it will be useful, but WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the GNU Library General Public License for more details.
  You should have received a copy of the GNU Library General Public
  License along with this library; if not, write to the Free Software
  Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

  modified by Ulrich Drepper  (drepper@karlsruhe.gmd.de)
          and Anatoly Ivasyuk (anatoly@nick.csh.rit.edu)

  modified by Juergen Pfeifer (juergen.pfeifer@gmx.net)	  
*/

#include "cursesw.h"
#include "internal.h"

MODULE_ID("$Id: cursesw.cc,v 1.13 1999/07/31 09:46:30 juergen Exp $")

#define COLORS_NEED_INITIALIZATION  -1
#define COLORS_NOT_INITIALIZED       0
#define COLORS_MONOCHROME            1
#define COLORS_ARE_REALLY_THERE      2

// declare static variables for the class
long NCursesWindow::count = 0L;
bool NCursesWindow::b_initialized = FALSE;

#if defined(__GNUG__)
#  ifndef _IO_va_list
#    define _IO_va_list char *
#  endif
#endif

int
NCursesWindow::scanw(const char* fmt, ...)
{
#if defined(__GNUG__)
    va_list args;
    va_start(args, fmt);
    char buf[BUFSIZ];
    int result = wgetstr(w, buf);
    if (result == OK) {
	strstreambuf ss(buf, BUFSIZ);
	result = ss.vscan(fmt, (_IO_va_list)args);
    }
    va_end(args);
    return result;
#else
    return ERR;
#endif
}


int
NCursesWindow::scanw(int y, int x, const char* fmt, ...)
{
#if defined(__GNUG__)
    va_list args;
    va_start(args, fmt);
    char buf[BUFSIZ];
    int result = wmove(w, y, x);
    if (result == OK) {
	result = wgetstr(w, buf);
	if (result == OK) {
	    strstreambuf ss(buf, BUFSIZ);
	    result = ss.vscan(fmt, (_IO_va_list)args);
	}
    }
    va_end(args);
    return result;
#else
    return ERR;
#endif
}


int
NCursesWindow::printw(const char * fmt, ...)
{
    va_list args;
    va_start(args, fmt);
    char buf[BUFSIZ];
    vsprintf(buf, fmt, args);
    va_end(args);
    return waddstr(w, buf);
}


int
NCursesWindow::printw(int y, int x, const char * fmt, ...)
{
    va_list args;
    va_start(args, fmt);
    int result = wmove(w, y, x);
    if (result == OK) {
	char buf[BUFSIZ];
	vsprintf(buf, fmt, args);
	result = waddstr(w, buf);
    }
    va_end(args);
    return result;
}


void
NCursesWindow::init(void)
{
    leaveok(0);
    keypad(1);
    meta(1);
}

void
NCursesWindow::err_handler(const char *msg) const THROWS(NCursesException)
{
  THROW(new NCursesException(msg));
}

void
NCursesWindow::initialize() {
  if (!b_initialized) {
    ::initscr();
    b_initialized = TRUE;
    if (colorInitialized==COLORS_NEED_INITIALIZATION) {
      colorInitialized=COLORS_NOT_INITIALIZED;
      useColors();
    }
    ::noecho();
    ::cbreak();
  }
}

NCursesWindow::NCursesWindow() {
  if (!b_initialized)
    initialize();
  
  w = (WINDOW *)0;
  init();
  alloced = FALSE;
  subwins = par = sib = 0;
  count++;
}

NCursesWindow::NCursesWindow(int lines, int cols, int begin_y, int begin_x)
{
    if (!b_initialized)
      initialize();

    w = ::newwin(lines, cols, begin_y, begin_x);
    if (w == 0) {
	err_handler("Cannot construct window");
    }
    init();

    alloced = TRUE;
    subwins = par = sib = 0;
    count++;
}

NCursesWindow::NCursesWindow(WINDOW* &window)
{
    if (!b_initialized)
      initialize();
    
    w = window;
    init();
    alloced = FALSE;
    subwins = par = sib = 0;
    count++;
}

NCursesWindow::NCursesWindow(NCursesWindow& win, int l, int c,
			     int begin_y, int begin_x, char absrel)
{
    if (absrel == 'a') { // absolute origin 
	begin_y -= win.begy();
	begin_x -= win.begx();
    }

    // Even though we treat subwindows as a tree, the standard curses
    // library needs the `subwin' call to link to the parent in
    // order to correctly perform refreshes, etc.
    // Friendly enough, this also works for pads.
    w = ::derwin(win.w, l, c, begin_y, begin_x);
    if (w == 0) {
	err_handler("Cannot construct subwindow");
    }

    par = &win;
    sib = win.subwins;
    win.subwins = this;
    subwins = 0;
    alloced = TRUE;
    count++;
}

NCursesWindow::NCursesWindow(NCursesWindow& win, bool do_box = TRUE)
{
  w = :: derwin(win.w,win.height()-2,win.width()-2,1,1);
  if (w == 0) {
    err_handler("Cannot construct subwindow");
  }

  par = &win;
  sib = win.subwins;
  win.subwins = this;
  subwins = 0;
  alloced = TRUE;
  count++;

  if (do_box) {
    win.box();
    win.touchwin();
  }
}
  
NCursesWindow NCursesWindow::Clone() {
  WINDOW *d = ::dupwin(w);
  NCursesWindow W(d);
  W.subwins = subwins;
  W.sib = sib;
  W.par = par;
  W.alloced = alloced;
  return W;
}

typedef int (*RIPOFFINIT)(NCursesWindow&);
static RIPOFFINIT R_INIT[5];       // There can't be more
static int r_init_idx   = 0;
static RIPOFFINIT* prip = R_INIT;

extern "C" int _nc_ripoffline(int,int (*init)(WINDOW*,int));

NCursesWindow::NCursesWindow(WINDOW *win, int cols) {
  w = win;
  assert((w->_maxx+1)==cols);
  alloced = FALSE;
  subwins = par = sib = 0;
}

int NCursesWindow::ripoff_init(WINDOW *w, int cols)
{
  int res = ERR;

  RIPOFFINIT init = *prip++;
  if (init) {
    NCursesWindow* W = new NCursesWindow(w,cols);
    res = init(*W);
  }
  return res;
}

int NCursesWindow::ripoffline(int ripoff_lines,
			      int (*init)(NCursesWindow& win)) {
  int code = ::_nc_ripoffline(ripoff_lines,ripoff_init);
  if (code==OK && init && ripoff_lines) {
    R_INIT[r_init_idx++] = init;
  }
  return code;
}

bool
NCursesWindow::isDescendant(NCursesWindow& win) {
  for (NCursesWindow* p = subwins; p != NULL; p = p->sib) {
    if (p==&win)
      return TRUE;
    else {
      if (p->isDescendant(win))
	return TRUE;
    }
  }
  return FALSE;
}

void
NCursesWindow::kill_subwindows()
{
    for (NCursesWindow* p = subwins; p != 0; p = p->sib) {
	p->kill_subwindows();
	if (p->alloced) {
	    if (p->w != 0)
		::delwin(p->w);
	    p->alloced = FALSE;
	}
	p->w = 0; // cause a run-time error if anyone attempts to use...
    }
}


NCursesWindow::~NCursesWindow()
{
    kill_subwindows();

    if (par != 0) {  // Snip us from the parent's list of subwindows.
	NCursesWindow * win = par->subwins;
	NCursesWindow * trail = 0;
	for (;;) {
	    if (win == 0)
		break;
	    else if (win == this) {
		if (trail != 0)
		    trail->sib = win->sib;
		else
		    par->subwins = win->sib;
		break;
	    } else {
		trail = win;
		win = win->sib;
	    }
	}
    }

    if (alloced && w != 0)
	delwin(w);

    if (alloced) {
      --count;
      if (count == 0) {
	::endwin();
      }
      else if (count < 0) { // cannot happen!
	err_handler("Too many windows destroyed");
      }
    }
}

// ---------------------------------------------------------------------
// Color stuff
//
int NCursesWindow::colorInitialized = COLORS_NOT_INITIALIZED;

void
NCursesWindow::useColors(void)
{
    if (colorInitialized == COLORS_NOT_INITIALIZED) {        
      if (b_initialized) {
	if (::has_colors()) {
	  ::start_color();
	  colorInitialized = COLORS_ARE_REALLY_THERE;
	}
	else
	  colorInitialized = COLORS_MONOCHROME;
      }
      else
	colorInitialized = COLORS_NEED_INITIALIZATION;
    }
}

short
NCursesWindow::getcolor(int getback) const 
{
    short fore, back;

    if (colorInitialized==COLORS_ARE_REALLY_THERE) {
      if (pair_content(PAIR_NUMBER(w->_attrs), &fore, &back))
	err_handler("Can't get color pair");
    }
    else {
      // Monochrome means white on black
      back = COLOR_BLACK;
      fore = COLOR_WHITE;
    }
    return getback ? back : fore;
}

int NCursesWindow::NumberOfColors()
{
  if (colorInitialized==COLORS_ARE_REALLY_THERE)
    return COLORS;
  else
    return 1; // monochrome (actually there are two ;-)
}

short
NCursesWindow::getcolor() const 
{
  if (colorInitialized==COLORS_ARE_REALLY_THERE)
    return PAIR_NUMBER(w->_attrs);
  else
    return 0; // we only have pair zero
}

int
NCursesWindow::setpalette(short fore, short back, short pair)
{
  if (colorInitialized==COLORS_ARE_REALLY_THERE)
    return init_pair(pair, fore, back);
  else
    return OK;
}

int
NCursesWindow::setpalette(short fore, short back)
{
  if (colorInitialized==COLORS_ARE_REALLY_THERE)
    return setpalette(fore, back, PAIR_NUMBER(w->_attrs));
  else
    return OK;
}


int
NCursesWindow::setcolor(short pair)
{
  if (colorInitialized==COLORS_ARE_REALLY_THERE) {
    if ((pair < 1) || (pair > COLOR_PAIRS))
      err_handler("Can't set color pair");
    
    attroff(A_COLOR);
    attrset(COLOR_PAIR(pair));
  }
  return OK;
}

extern "C" int _nc_has_mouse(void);

bool NCursesWindow::has_mouse() const {
  return ((::has_key(KEY_MOUSE) || ::_nc_has_mouse()) 
	  ? TRUE : FALSE);
}