aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/event.cpp
blob: 9a87c6de0b5a017d16d687f497af5f2e27285ab1 (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
/* 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.
 *
 */

#include "common/system.h"
#include "common/events.h"
#include "common/file.h"

#include "sci/sci.h"
#include "sci/event.h"
#include "sci/console.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/graphics/screen.h"

namespace Sci {

struct ScancodeRow {
	int offset;
	const char *keys;
};

static const ScancodeRow scancodeAltifyRows[] = {
	{ 0x10, "QWERTYUIOP[]"  },
	{ 0x1e, "ASDFGHJKL;'\\" },
	{ 0x2c, "ZXCVBNM,./"    }
};

static const byte codePageMap88591ToDOS[0x80] = {
	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', // 0x8x
	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', // 0x9x
	 '?', 0xad, 0x9b, 0x9c,  '?', 0x9d,  '?', 0x9e,  '?',  '?', 0xa6, 0xae, 0xaa,  '?',  '?',  '?', // 0xAx
	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xa7, 0xaf, 0xac, 0xab,  '?', 0xa8, // 0xBx
	 '?',  '?',  '?',  '?', 0x8e, 0x8f, 0x92, 0x80,  '?', 0x90,  '?',  '?',  '?',  '?',  '?',  '?', // 0xCx
	 '?', 0xa5,  '?',  '?',  '?',  '?', 0x99,  '?',  '?',  '?',  '?',  '?', 0x9a,  '?',  '?', 0xe1, // 0xDx
	0x85, 0xa0, 0x83,  '?', 0x84, 0x86, 0x91, 0x87, 0x8a, 0x82, 0x88, 0x89, 0x8d, 0xa1, 0x8c, 0x8b, // 0xEx
	 '?', 0xa4, 0x95, 0xa2, 0x93,  '?', 0x94,  '?',  '?', 0x97, 0xa3, 0x96, 0x81,  '?',  '?', 0x98  // 0xFx
};

struct SciKeyConversion {
	Common::KeyCode scummVMKey;
	int sciKeyNumlockOff;
	int sciKeyNumlockOn;
};

static const SciKeyConversion keyMappings[] = {
	{ Common::KEYCODE_UP          , SCI_KEY_UP     , SCI_KEY_UP     },
	{ Common::KEYCODE_DOWN        , SCI_KEY_DOWN   , SCI_KEY_DOWN   },
	{ Common::KEYCODE_RIGHT       , SCI_KEY_RIGHT  , SCI_KEY_RIGHT  },
	{ Common::KEYCODE_LEFT        , SCI_KEY_LEFT   , SCI_KEY_LEFT   },
	{ Common::KEYCODE_INSERT      , SCI_KEY_INSERT , SCI_KEY_INSERT },
	{ Common::KEYCODE_HOME        , SCI_KEY_HOME   , SCI_KEY_HOME   },
	{ Common::KEYCODE_END         , SCI_KEY_END    , SCI_KEY_END    },
	{ Common::KEYCODE_PAGEUP      , SCI_KEY_PGUP   , SCI_KEY_PGUP   },
	{ Common::KEYCODE_PAGEDOWN    , SCI_KEY_PGDOWN , SCI_KEY_PGDOWN },
	{ Common::KEYCODE_DELETE      , SCI_KEY_DELETE , SCI_KEY_DELETE },
	// Keypad
	{ Common::KEYCODE_KP0         , SCI_KEY_INSERT , '0'            },
	{ Common::KEYCODE_KP1         , SCI_KEY_END    , '1'            },
	{ Common::KEYCODE_KP2         , SCI_KEY_DOWN   , '2'            },
	{ Common::KEYCODE_KP3         , SCI_KEY_PGDOWN , '3'            },
	{ Common::KEYCODE_KP4         , SCI_KEY_LEFT   , '4'            },
	{ Common::KEYCODE_KP5         , SCI_KEY_CENTER , '5'            },
	{ Common::KEYCODE_KP6         , SCI_KEY_RIGHT  , '6'            },
	{ Common::KEYCODE_KP7         , SCI_KEY_HOME   , '7'            },
	{ Common::KEYCODE_KP8         , SCI_KEY_UP     , '8'            },
	{ Common::KEYCODE_KP9         , SCI_KEY_PGUP   , '9'            },
	{ Common::KEYCODE_KP_PERIOD   , SCI_KEY_DELETE , '.'            },
	{ Common::KEYCODE_KP_ENTER    , SCI_KEY_ENTER  , SCI_KEY_ENTER  },
	{ Common::KEYCODE_KP_PLUS     , '+'            , '+'            },
	{ Common::KEYCODE_KP_MINUS    , '-'            , '-'            },
	{ Common::KEYCODE_KP_MULTIPLY , '*'            , '*'            },
	{ Common::KEYCODE_KP_DIVIDE   , '/'            , '/'            },
};

struct MouseEventConversion {
	Common::EventType commonType;
	short sciType;
};

static const MouseEventConversion mouseEventMappings[] = {
	{ Common::EVENT_LBUTTONDOWN,   SCI_EVENT_MOUSE_PRESS },
	{ Common::EVENT_RBUTTONDOWN,   SCI_EVENT_MOUSE_PRESS },
	{ Common::EVENT_MBUTTONDOWN,   SCI_EVENT_MOUSE_PRESS },
	{   Common::EVENT_LBUTTONUP, SCI_EVENT_MOUSE_RELEASE },
	{   Common::EVENT_RBUTTONUP, SCI_EVENT_MOUSE_RELEASE },
	{   Common::EVENT_MBUTTONUP, SCI_EVENT_MOUSE_RELEASE }
};

EventManager::EventManager(bool fontIsExtended) : _fontIsExtended(fontIsExtended) {
}

EventManager::~EventManager() {
}

static int altify(int ch) {
	// Calculates a PC keyboard scancode from a character */
	int row;
	int c = toupper((char)ch);

	for (row = 0; row < ARRAYSIZE(scancodeAltifyRows); row++) {
		const char *keys = scancodeAltifyRows[row].keys;
		int offset = scancodeAltifyRows[row].offset;

		while (*keys) {
			if (*keys == c)
				return offset << 8;

			offset++;
			keys++;
		}
	}

	return ch;
}

SciEvent EventManager::getScummVMEvent() {
	SciEvent input = { SCI_EVENT_NONE, 0, 0, Common::Point(0, 0) };
	SciEvent noEvent = { SCI_EVENT_NONE, 0, 0, Common::Point(0, 0) };

	Common::EventManager *em = g_system->getEventManager();
	Common::Event ev;

	bool found = em->pollEvent(ev);

	// Don't generate events for mouse movement
	while (found && ev.type == Common::EVENT_MOUSEMOVE)
		found = em->pollEvent(ev);

	// Save the mouse position
	//
	// We call getMousePos of the event manager here, since we also want to
	// store the mouse position in case of keyboard events, which do not feature
	// any mouse position information itself.
	// This should be safe, since the mouse position in the event manager should
	// only be updated when a mouse related event has been taken from the queue
	// via pollEvent.
	// We also adjust the position based on the scaling of the screen.
	Common::Point mousePos = em->getMousePos();
	g_sci->_gfxScreen->adjustBackUpscaledCoordinates(mousePos.y, mousePos.x);

	noEvent.mousePos = input.mousePos = mousePos;

	if (!found || ev.type == Common::EVENT_MOUSEMOVE) {
		int modifiers = em->getModifierState();
		noEvent.modifiers =
			((modifiers & Common::KBD_ALT) ? SCI_KEYMOD_ALT : 0) |
			((modifiers & Common::KBD_CTRL) ? SCI_KEYMOD_CTRL : 0) |
			((modifiers & Common::KBD_SHIFT) ? SCI_KEYMOD_LSHIFT | SCI_KEYMOD_RSHIFT : 0);

		return noEvent;
	}
	if (ev.type == Common::EVENT_QUIT) {
		input.type = SCI_EVENT_QUIT;
		return input;
	}

	int scummVMKeyFlags;

	switch (ev.type) {
	case Common::EVENT_KEYDOWN:
	case Common::EVENT_KEYUP:
		// Use keyboard modifiers directly in case this is a keyboard event
		scummVMKeyFlags = ev.kbd.flags;
		break;
	default:
		// Otherwise get them from EventManager
		scummVMKeyFlags = em->getModifierState();
		break;
	}

	input.modifiers =
		((scummVMKeyFlags & Common::KBD_ALT) ? SCI_KEYMOD_ALT : 0) |
		((scummVMKeyFlags & Common::KBD_CTRL) ? SCI_KEYMOD_CTRL : 0) |
		((scummVMKeyFlags & Common::KBD_SHIFT) ? SCI_KEYMOD_LSHIFT | SCI_KEYMOD_RSHIFT : 0);
		// Caps lock and Scroll lock have been removed, cause we already handle upper
		// case keys and Scroll lock doesn't seem to be used anywhere
		//((ourModifiers & Common::KBD_CAPS) ? SCI_KEYMOD_CAPSLOCK : 0) |
		//((ourModifiers & Common::KBD_SCRL) ? SCI_KEYMOD_SCRLOCK : 0) |

	// Handle mouse events
	for (int i = 0; i < ARRAYSIZE(mouseEventMappings); i++) {
		if (mouseEventMappings[i].commonType == ev.type) {
			input.type = mouseEventMappings[i].sciType;
			// Sierra passed keyboard modifiers for mouse events, too.

			// Sierra also set certain modifiers within their mouse interrupt handler
			// This whole thing was probably meant for people using a mouse, that only featured 1 button
			// So the user was able to press Ctrl and click the mouse button to create a right click.
			switch (ev.type) {
			case Common::EVENT_RBUTTONDOWN: // right button
			case Common::EVENT_RBUTTONUP:
				input.modifiers |= (SCI_KEYMOD_RSHIFT | SCI_KEYMOD_LSHIFT); // this value was hardcoded in the mouse interrupt handler
				break;
			case Common::EVENT_MBUTTONDOWN: // middle button
			case Common::EVENT_MBUTTONUP:
				input.modifiers |= SCI_KEYMOD_CTRL; // this value was hardcoded in the mouse interrupt handler
				break;
			default:
				break;
			}
			return input;
		}
	}

	// If we reached here, make sure that it's a keydown event
	if (ev.type != Common::EVENT_KEYDOWN)
		return noEvent;

	// Check for Control-Shift-D (debug console)
	if (ev.kbd.hasFlags(Common::KBD_CTRL | Common::KBD_SHIFT) && ev.kbd.keycode == Common::KEYCODE_d) {
		// Open debug console
		Console *con = g_sci->getSciDebugger();
		con->attach();
		return noEvent;
	}

	// Process keyboard events

	bool numlockOn = (ev.kbd.flags & Common::KBD_NUM);

	Common::KeyCode scummVMKeycode = ev.kbd.keycode;

	input.character = ev.kbd.ascii;
	input.type = SCI_EVENT_KEYBOARD;

	if (scummVMKeycode >= Common::KEYCODE_KP0 && scummVMKeycode <= Common::KEYCODE_KP9) {
		if (!(scummVMKeyFlags & Common::KBD_NUM)) {
			// HACK: Num-Lock not enabled
			// We shouldn't get a valid ascii code in these cases. We fix it here, so that cursor keys
			// on the numpad work properly.
			input.character = 0;
		}
	}

	if ((input.character) && (input.character <= 0xFF)) {
		// Directly accept most common keys without conversion
		if ((input.character >= 0x80) && (input.character <= 0xFF)) {
			// If there is no extended font, we will just clear the
			// current event.
			// Sierra SCI actually accepted those characters, but
			// didn't display them inside text edit controls because
			// the characters were missing inside the font(s).
			// We filter them out for non-multilingual games because
			// of that.
			if (!_fontIsExtended)
				return noEvent;
			// Convert 8859-1 characters to DOS (cp850/437) for
			// multilingual SCI01 games
			input.character = codePageMap88591ToDOS[input.character & 0x7f];
		}
		if (scummVMKeycode == Common::KEYCODE_TAB) {
			input.character = SCI_KEY_TAB;
			if (scummVMKeyFlags & Common::KBD_SHIFT)
				input.character = SCI_KEY_SHIFT_TAB;
		}
		if (scummVMKeycode == Common::KEYCODE_DELETE)
			input.character = SCI_KEY_DELETE;
	} else if ((scummVMKeycode >= Common::KEYCODE_F1) && scummVMKeycode <= Common::KEYCODE_F10) {
		// SCI_K_F1 == 59 << 8
		// SCI_K_SHIFT_F1 == 84 << 8
		if (!(scummVMKeyFlags & Common::KBD_SHIFT))
			input.character = SCI_KEY_F1 + ((scummVMKeycode - Common::KEYCODE_F1)<<8);
		else
			input.character = SCI_KEY_SHIFT_F1 + ((scummVMKeycode - Common::KEYCODE_F1)<<8);
	} else {
		// Special keys that need conversion
		for (int i = 0; i < ARRAYSIZE(keyMappings); i++) {
			if (keyMappings[i].scummVMKey == scummVMKeycode) {
				input.character = numlockOn ? keyMappings[i].sciKeyNumlockOn : keyMappings[i].sciKeyNumlockOff;
				break;
			}
		}
	}

	// When Ctrl AND Alt are pressed together with a regular key, Linux will give us control-key, Windows will give
	//  us the actual key. My opinion is that windows is right, because under DOS the keys worked the same, anyway
	//  we support the other case as well
	if ((scummVMKeyFlags & Common::KBD_ALT) && input.character > 0 && input.character < 27)
		input.character += 96; // 0x01 -> 'a'

	// Scancodify if appropriate
	if (scummVMKeyFlags & Common::KBD_ALT)
		input.character = altify(input.character);
	if (getSciVersion() <= SCI_VERSION_1_MIDDLE && (scummVMKeyFlags & Common::KBD_CTRL) && input.character > 0 && input.character < 27)
		input.character += 96; // 0x01 -> 'a'

	// If no actual key was pressed (e.g. if only a modifier key was pressed),
	// ignore the event
	if (!input.character)
		return noEvent;

	return input;
}

void EventManager::updateScreen() {
	// Update the screen here, since it's called very often.
	// Throttle the screen update rate to 60fps.
	EngineState *s = g_sci->getEngineState();
	if (g_system->getMillis() - s->_screenUpdateTime >= 1000 / 60) {
		g_system->updateScreen();
		s->_screenUpdateTime = g_system->getMillis();
		// Throttle the checking of shouldQuit() to 60fps as well, since
		// Engine::shouldQuit() invokes 2 virtual functions
		// (EventManager::shouldQuit() and EventManager::shouldRTL()),
		// which is very expensive to invoke constantly without any
		// throttling at all.
		if (g_engine->shouldQuit())
			s->abortScriptProcessing = kAbortQuitGame;
	}
}

SciEvent EventManager::getSciEvent(unsigned int mask) {
	SciEvent event = { SCI_EVENT_NONE, 0, 0, Common::Point(0, 0) };

	EventManager::updateScreen();

	// Get all queued events from graphics driver
	do {
		event = getScummVMEvent();
		if (event.type != SCI_EVENT_NONE)
			_events.push_back(event);
	} while (event.type != SCI_EVENT_NONE);

	// Search for matching event in queue
	Common::List<SciEvent>::iterator iter = _events.begin();
	while (iter != _events.end() && !(iter->type & mask))
		++iter;

	if (iter != _events.end()) {
		// Event found
		event = *iter;

		// If not peeking at the queue, remove the event
		if (!(mask & SCI_EVENT_PEEK))
			_events.erase(iter);
	} else {
		// No event found: we must return a SCI_EVT_NONE event.

		// Because event.type is SCI_EVT_NONE already here,
		// there is no need to change it.
	}

	return event;
}

void SciEngine::sleep(uint32 msecs) {
	uint32 time;
	const uint32 wakeUpTime = g_system->getMillis() + msecs;

	while (true) {
		// let backend process events and update the screen
		_eventMan->getSciEvent(SCI_EVENT_PEEK);
		time = g_system->getMillis();
		if (time + 10 < wakeUpTime) {
			g_system->delayMillis(10);
		} else {
			if (time < wakeUpTime)
				g_system->delayMillis(wakeUpTime - time);
			break;
		}

	}
}


} // End of namespace Sci