aboutsummaryrefslogtreecommitdiff
path: root/engines/agi/text.cpp
blob: 560e9b6f346723bcf5d7361dea1ea7d446a5d3d8 (plain)
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
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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 General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "agi/agi.h"
#include "agi/sprite.h"		/* for commit_both() */
#include "agi/graphics.h"
#include "agi/keyboard.h"

namespace Agi {

void AgiEngine::printText2(int l, const char *msg, int foff, int xoff, int yoff,
				int len, int fg, int bg, bool checkerboard) {
	int x1, y1;
	int maxx, minx, ofoff;
	int update;
	/* Note: Must be unsigned to use AGDS cyrillic characters! */
#ifdef __DS__
	// On the DS, a compiler bug causes the text to render incorrectly, because
	// GCC tries to optimisie out writes to this pointer (tested on DevkitARM v19b and v20)
	// Making this pointer volatile fixes this.
	volatile const unsigned char *m;
#else
	const unsigned char *m;
#endif

	/* kludge! */
	update = 1;
	if (l == 2) {
		update = l = 0;
	}

	/* FR: strings with len == 1 were not printed
	 */
	if (len == 1) {
		_gfx->putTextCharacter(l, xoff + foff, yoff, *msg, fg, bg, checkerboard);
		maxx = 1;
		minx = 0;
		ofoff = foff;
		y1 = 0;		/* Check this */
	} else {
		maxx = 0;
		minx = GFX_WIDTH;
		ofoff = foff;

		for (m = (const unsigned char *)msg, x1 = y1 = 0; *m; m++) {

			if (*m >= 0x20 || *m == 1 || *m == 2 || *m == 3) {
				/* FIXME */
				int ypos;

				ypos = (y1 * CHAR_LINES) + yoff;

				if ((x1 != (len - 1) || x1 == 39) && (ypos <= (GFX_HEIGHT - CHAR_LINES))) {
					int xpos;

					xpos = (x1 * CHAR_COLS) + xoff + foff;

					if (xpos >= GFX_WIDTH)
						continue;

					_gfx->putTextCharacter(l, xpos, ypos, *m, fg, bg, checkerboard);

					if (x1 > maxx)
						maxx = x1;
					if (x1 < minx)
						minx = x1;
				}

				x1++;
				
				/* DF: changed the len-1 to len... */
				if (x1 == len && m[1] != '\n')
					y1++, x1 = foff = 0;
			} else {
				y1++;
				x1 = foff = 0;
			}
		}
	}

	if (l)
		return;

	if (maxx < minx)
		return;

	maxx *= CHAR_COLS;
	minx *= CHAR_COLS;

	if (update) {
		_gfx->scheduleUpdate(foff + xoff + minx, yoff, ofoff + xoff + maxx + CHAR_COLS - 1,
				yoff + y1 * CHAR_LINES + CHAR_LINES + 1);
		/* Making synchronous text updates reduces CPU load
		 * when updating status line and input area
		 */
		_gfx->doUpdate();
	}
}

/* len is in characters, not pixels!!
 */
void AgiEngine::blitTextbox(const char *p, int y, int x, int len) {
	/* if x | y = -1, then centre the box */
	int xoff, yoff, lin, h, w;
	char *msg, *m;

	debugC(3, kDebugLevelText, "x=%d, y=%d, len=%d", x, y, len);
	if (_game.window.active)
		closeWindow();

	if (x == 0 && y == 0 && len == 0)
		x = y = -1;

	if (len <= 0 || len >= 40)
		len = 32;

	xoff = x * CHAR_COLS;
	yoff = y * CHAR_LINES;
	len--;

	m = msg = wordWrapString(agiSprintf(p), &len);

	for (lin = 1; *m; m++) {
		/* Test \r for MacOS 8 */
		if (*m == '\n' || *m == '\r')
			lin++;
	}

	if (lin * CHAR_LINES > GFX_HEIGHT)
		lin = (GFX_HEIGHT / CHAR_LINES);

	w = (len + 2) * CHAR_COLS;
	h = (lin + 2) * CHAR_LINES;

	if (xoff < 0)
		xoff = (GFX_WIDTH - w - CHAR_COLS) / 2;
	else
		xoff -= CHAR_COLS;

	if (yoff < 0)
		yoff = (GFX_HEIGHT - 3 * CHAR_LINES - h) / 2;

	drawWindow(xoff, yoff, xoff + w - 1, yoff + h - 1);

	printText2(2, msg, 0, CHAR_COLS + xoff, CHAR_LINES + yoff,
			len + 1, MSG_BOX_TEXT, MSG_BOX_COLOUR);

	free(msg);

	_gfx->doUpdate();
}

void AgiEngine::eraseTextbox() {
	if (!_game.window.active) {
		debugC(3, kDebugLevelText, "no window active");
		return;
	}

	debugC(4, kDebugLevelText, "x1=%d, y1=%d, x2=%d, y2=%d", _game.window.x1,
			_game.window.y1, _game.window.x2, _game.window.y2);

	_gfx->restoreBlock(_game.window.x1, _game.window.y1,
			_game.window.x2, _game.window.y2, _game.window.buffer);

	free(_game.window.buffer);
	_game.window.active = false;

	_gfx->doUpdate();
}

/*
 * Public functions
 */

/**
 * Print text in the AGI engine screen.
 */
void AgiEngine::printText(const char *msg, int f, int x, int y, int len, int fg, int bg, bool checkerboard) {
	f *= CHAR_COLS;
	x *= CHAR_COLS;
	y *= CHAR_LINES;

	debugC(4, kDebugLevelText, "%s, %d, %d, %d, %d, %d, %d", msg, f, x, y, len, fg, bg);
	printText2(0, agiSprintf(msg), f, x, y, len, fg, bg, checkerboard);
}

/**
 * Print text in the AGI engine console.
 */
void AgiEngine::printTextConsole(const char *msg, int x, int y, int len, int fg, int bg) {
	x *= CHAR_COLS;
	y *= 10;

	printText2(1, msg, 0, x, y, len, fg, bg);
}

/**
 * Wrap text line to the specified width.
 * @param str  String to wrap.
 * @param len  Length of line.
 */
char *AgiEngine::wordWrapString(char *str, int *len) {
	/* If the message has a long word (longer than 31 character) then
	 * loop in line 239 (for (; *v != ' '; v--, c--);) can wrap
	 * around 0 and write large number in c. This causes returned
	 * length to be negative (!) and eventually crashes in calling
	 * code. The fix is simple -- remove unsigned in maxc, c, l
	 * declaration.  --Vasyl
	 */
	char *msg, *v, *e;
	int maxc, c, l = *len;

	v = msg = strdup(str);
	e = msg + strlen(msg);
	maxc = 0;

	for (;;) {
		debugC(3, kDebugLevelText, "[%s], %d", msg, maxc);
		if (strchr(v, ' ') == NULL && (int)strlen(v) > l) {
			debugC(1, kDebugLevelText | kDebugLevelMain, "Word too long in message");
			l = strlen(v);
		}
		/* Must include \r for MacOS 8 */
		while ((c = strcspn(v, "\n\r")) <= l) {
			debugC(3, kDebugLevelText, "c = %d, maxc = %d", c, maxc);
			if (c > maxc)
				maxc = c;
			if ((v += c + 1) >= e)
				goto end;
		}
		c = l;
		if ((v += l) >= e)
			break;

		/* The same line that caused that bug I mentioned
		 * should also do another check:
		 * for (; *v != ' ' && *v != '\n'; v--, c--);
		 * While this does not matter in most cases, in the case of
		 * long words it caused extra \n inserted in the line
		 * preceding long word. This one is definitely non-critical;
		 * one might argue that the function is not supposed to deal
		 * with long words. BTW, that condition at the beginning of
		 * the while loop that checks word length does not make much
		 * sense -- it verifies the length of the first word but for
		 * the rest it does something odd. Overall, even with these
		 * changes the function is still not completely robust.
		 * --Vasyl
		 */
		if (*v != ' ')
			for (; *v != ' ' && *v != '\n' && *v != '\r';
			    v--, c--);
		if (c > maxc)
			maxc = c;
		*v++ = '\n';
	}
      end:
	*len = maxc;
	return msg;
}

/**
 * Remove existing window, if any.
 */
void AgiEngine::closeWindow() {
	debugC(4, kDebugLevelText, "close window");
	_sprites->eraseBoth();
	eraseTextbox();	/* remove window, if any */
	_sprites->blitBoth();
	_sprites->commitBoth();		/* redraw sprites */
	_game.hasWindow = false;
}

/**
 * Display a message box.
 * This function displays the specified message in a text box
 * centered in the screen and waits until a key is pressed.
 * @param p The text to be displayed
 */
int AgiEngine::messageBox(const char *s) {
	int k;

	_sprites->eraseBoth();
	blitTextbox(s, -1, -1, -1);
	_sprites->blitBoth();
	k = waitKey();
	debugC(4, kDebugLevelText, "wait_key returned %02x", k);
	closeWindow();

	return k;
}

/**
 * Display a message box with buttons.
 * This function displays the specified message in a text box
 * centered in the screen and waits until a button is pressed.
 * @param p The text to be displayed
 * @param b NULL-terminated list of button labels
 */
int AgiEngine::selectionBox(const char *m, const char **b) {
	int numButtons = 0;
	int x, y, i, s;
	int key, active = 0;
	int rc = -1;
	int bx[5], by[5];

	_sprites->eraseBoth();
	blitTextbox(m, -1, -1, -1);

	x = _game.window.x1 + 5 * CHAR_COLS / 2;
	y = _game.window.y2 - 5 * CHAR_LINES / 2;
	s = _game.window.x2 - _game.window.x1 + 1 - 5 * CHAR_COLS;
	debugC(3, kDebugLevelText, "s = %d", s);

	/* Automatically position buttons */
	for (i = 0; b[i]; i++) {
		numButtons++;
		s -= CHAR_COLS * strlen(b[i]);
	}

	if (i > 1) {
		debugC(3, kDebugLevelText, "s / %d = %d", i - 1, s / (i - 1));
		s /= (i - 1);
	} else {
		x += s / 2;
	}

	for (i = 0; b[i]; i++) {
		bx[i] = x;
		by[i] = y;
		x += CHAR_COLS * strlen(b[i]) + s;
	}

	_sprites->blitBoth();

	/* clear key queue */
	while (_gfx->keypress()) {
		_gfx->getKey();
	}

	AllowSyntheticEvents on(this);

	debugC(4, kDebugLevelText, "waiting...");
	for (;;) {
		for (i = 0; b[i]; i++)
			_gfx->drawCurrentStyleButton(bx[i], by[i], b[i], i == active, false, i == 0);

		_gfx->pollTimer();	/* msdos driver -> does nothing */
		key = doPollKeyboard();
		switch (key) {
		case KEY_ENTER:
			rc = active;
			goto press;
		case KEY_ESCAPE:
			rc = -1;
			goto getout;
		case KEY_RIGHT:
			active++;
			if (active >= numButtons)
				active = 0;
			break;
		case KEY_LEFT:
			active--;
			if (active < 0)
				active = numButtons - 1;
			break;
		case BUTTON_LEFT:
			for (i = 0; b[i]; i++) {
				if (_gfx->testButton(bx[i], by[i], b[i])) {
					rc = active = i;
					goto press;
				}
			}
			break;
		case 0x09:	/* Tab */
			debugC(3, kDebugLevelText, "Focus change");
			active++;
			active %= i;
			break;
		}
		_gfx->doUpdate();
	}

press:
	debugC(4, kDebugLevelText, "Button pressed: %d", rc);

getout:
	closeWindow();
	debugC(2, kDebugLevelText, "Result = %d", rc);

	return rc;
}

/**
 *
 */
int AgiEngine::print(const char *p, int lin, int col, int len) {
	if (p == NULL)
		return 0;

	debugC(4, kDebugLevelText, "lin = %d, col = %d, len = %d", lin, col, len);

	if (col == 0 && lin == 0 && len == 0)
		lin = col = -1;

	if (len == 0)
		len = 30;

	blitTextbox(p, lin, col, len);

	if (getflag(fOutputMode)) {
		/* non-blocking window */
		setflag(fOutputMode, false);
		return 1;
	}

	/* blocking */

	if (_game.vars[vWindowReset] == 0) {
		int k;
		setvar(vKey, 0);
		k = waitKey();
		closeWindow();
		return k;
	}

	/* timed window */

	debugC(3, kDebugLevelText, "f15==0, v21==%d => timed", getvar(21));
	_game.msgBoxTicks = getvar(vWindowReset) * 10;
	setvar(vKey, 0);

	do {
		mainCycle();
		if (_game.keypress == KEY_ENTER) {
			debugC(4, kDebugLevelText, "KEY_ENTER");
			setvar(vWindowReset, 0);
			_game.keypress = 0;
			break;
		}
	} while (_game.msgBoxTicks > 0);

	setvar(vWindowReset, 0);

	closeWindow();

	return 0;
}

/**
 *
 */
void AgiEngine::printStatus(const char *message, ...) {
	char x[42];
	va_list args;

	va_start(args, message);

	vsprintf(x, message, args);

	va_end(args);

	debugC(4, kDebugLevelText, "fg=%d, bg=%d", STATUS_FG, STATUS_BG);
	printText(x, 0, 0, _game.lineStatus, 40, STATUS_FG, STATUS_BG);
}

char *AgiEngine::safeStrcat(char *s, const char *t) {
	if (t != NULL)
		strcat(s, t);

	return s;
}

/**
 * Formats AGI string.
 * This function turns a AGI string into a real string expanding values
 * according to the AGI format specifiers.
 * @param s  string containing the format specifier
 * @param n  logic number
 */
#define MAX_LEN 768
char *AgiEngine::agiSprintf(const char *s) {
	static char y[MAX_LEN];
	char x[MAX_LEN];
	char z[16], *p;

	debugC(3, kDebugLevelText, "logic %d, '%s'", _game.lognum, s);
	p = x;

	for (*p = 0; *s;) {
		switch (*s) {
		case '\\':
			s++;
			goto literal;
		case '%':
			s++;
			switch (*s++) {
				int i;
			case 'v':
				i = strtoul(s, NULL, 10);
				while (*s >= '0' && *s <= '9')
					s++;
				sprintf(z, "%015i", getvar(i));

				i = 99;
				if (*s == '|') {
					s++;
					i = strtoul(s, NULL, 10);
					while (*s >= '0' && *s <= '9')
						s++;
				}

				if (i == 99) {
					/* remove all leading 0 */
					/* don't remove the 3rd zero if 000 */
					for (i = 0;
					    z[i] == '0' && i < 14; i++);
				} else {
					i = 15 - i;
				}
				safeStrcat(p, z + i);
				break;
			case '0':
				i = strtoul(s, NULL, 10) - 1;
				safeStrcat(p, objectName(i));
				break;
			case 'g':
				i = strtoul(s, NULL, 10) - 1;
				safeStrcat(p, _game.logics[0].texts[i]);
				break;
			case 'w':
				i = strtoul(s, NULL, 10) - 1;
				safeStrcat(p, _game.egoWords[i].word);
				break;
			case 's':
				i = strtoul(s, NULL, 10);
				safeStrcat(p, _game.strings[i]);
				break;
			case 'm':
				i = strtoul(s, NULL, 10) - 1;
				if (_game.logics[_game.lognum].numTexts > i)
					safeStrcat(p, agiSprintf(_game. logics[_game.lognum].texts[i]));
				break;
			}

			while (*s >= '0' && *s <= '9')
				s++;
			while (*p)
				p++;
			break;

		default:
literal:
			assert(p < x + MAX_LEN);
			*p++ = *s++;
			*p = 0;
			break;
		}
	}

	strcpy(y, x);
	return y;
}

/**
 * Write the status line.
 */
void AgiEngine::writeStatus() {
	char x[64];

	if (_debug.statusline) {
		printStatus("%3d(%03d) %3d,%3d(%3d,%3d)               ",
				getvar(0), getvar(1), _game.viewTable[0].xPos,
				_game.viewTable[0].yPos, WIN_TO_PIC_X(g_mouse.x),
				WIN_TO_PIC_Y(g_mouse.y));
		return;
	}

	if (!_game.statusLine) {
		int l = _game.lineStatus;
		clearLines(l, l, 0);
		flushLines(l, l);
		return;
	}

	sprintf(x, " Score:%i of %-3i", _game.vars[vScore], _game.vars[vMaxScore]);
	printStatus("%-17s             Sound:%s ", x, getflag(fSoundOn) ? "on " : "off");
}

/**
 * Print user input prompt.
 */
void AgiEngine::writePrompt() {
	int l, fg, bg, pos;

	if (!_game.inputEnabled || _game.inputMode != INPUT_NORMAL)
		return;

	l = _game.lineUserInput;
	fg = _game.colorFg;
	bg = _game.colorBg;
	pos = _game.cursorPos;

	debugC(4, kDebugLevelText, "erase line %d", l);
	clearLines(l, l, _game.colorBg);

	debugC(4, kDebugLevelText, "prompt = '%s'", agiSprintf(_game.strings[0]));
	printText(_game.strings[0], 0, 0, l, 1, fg, bg);
	printText((char *)_game.inputBuffer, 0, 1, l, pos + 1, fg, bg);
	_gfx->printCharacter(pos + 1, l, _game.cursorChar, fg, bg);

	flushLines(l, l);
	_gfx->doUpdate();
}

/**
 * Clear text lines in the screen.
 * @param l1  start line
 * @param l2  end line
 * @param c   color
 */
void AgiEngine::clearLines(int l1, int l2, int c) {
	/* do we need to adjust for +8 on topline?
	 * inc for endline so it matches the correct num
	 * ie, from 22 to 24 is 3 lines, not 2 lines.
	 */

	l1 *= CHAR_LINES;
	l2 *= CHAR_LINES;
	l2 += CHAR_LINES - 1;

	_gfx->drawRectangle(0, l1, GFX_WIDTH - 1, l2, c);
}

/**
 *
 */
void AgiEngine::flushLines(int l1, int l2) {
	l1 *= CHAR_LINES;
	l2 *= CHAR_LINES;
	l2 += CHAR_LINES - 1;

	_gfx->flushBlock(0, l1, GFX_WIDTH - 1, l2);
}

/**
 *
 */
void AgiEngine::drawWindow(int x1, int y1, int x2, int y2) {
	_game.window.active = true;
	_game.window.x1 = x1;
	_game.window.y1 = y1;
	_game.window.x2 = x2;
	_game.window.y2 = y2;
	_game.window.buffer = (uint8 *)malloc((x2 - x1 + 1) * (y2 - y1 + 1));

	debugC(4, kDebugLevelText, "x1=%d, y1=%d, x2=%d, y2=%d", x1, y1, x2, y2);
	_gfx->saveBlock(x1, y1, x2, y2, _game.window.buffer);
	_gfx->drawBox(x1, y1, x2, y2, MSG_BOX_COLOUR, MSG_BOX_LINE, 2);
}

} // End of namespace Agi