summaryrefslogtreecommitdiff
path: root/src/osk_gui.cpp
blob: 51dbd474589fc7f9daebd17fa13943c5cf7a3a56 (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
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file osk_gui.cpp The On Screen Keyboard GUI */

#include "stdafx.h"
#include "string_func.h"
#include "strings_func.h"
#include "debug.h"
#include "window_func.h"
#include "gfx_func.h"
#include "querystring_gui.h"

#include "table/sprites.h"
#include "table/strings.h"

/** Widget numbers of the on-screen keyboard (OSK) window. */
enum OskWidgets {
	OSK_WIDGET_CAPTION,         ///< Title bar.
	OSK_WIDGET_TEXT,            ///< Edit box.
	OSK_WIDGET_CANCEL,          ///< Cancel key.
	OSK_WIDGET_OK,              ///< Ok key.
	OSK_WIDGET_BACKSPACE,       ///< Backspace key.
	OSK_WIDGET_SPECIAL,         ///< Special key (at keyborads often used for tab key).
	OSK_WIDGET_CAPS,            ///< Capslock key.
	OSK_WIDGET_SHIFT,           ///< Shift(lock) key.
	OSK_WIDGET_SPACE,           ///< Space bar.
	OSK_WIDGET_LEFT,            ///< Cursor left key.
	OSK_WIDGET_RIGHT,           ///< Cursor right key.
	OSK_WIDGET_LETTERS,         ///< First widget of the 'normal' keys.

	OSK_WIDGET_NUMBERS_FIRST = OSK_WIDGET_LETTERS,           ///< First widget of the numbers row.
	OSK_WIDGET_NUMBERS_LAST = OSK_WIDGET_NUMBERS_FIRST + 13, ///< Last widget of the numbers row.

	OSK_WIDGET_QWERTY_FIRST,                                 ///< First widget of the qwerty row.
	OSK_WIDGET_QWERTY_LAST = OSK_WIDGET_QWERTY_FIRST + 11,   ///< Last widget of the qwerty row.

	OSK_WIDGET_ASDFG_FIRST,                                  ///< First widget of the asdfg row.
	OSK_WIDGET_ASDFG_LAST = OSK_WIDGET_ASDFG_FIRST + 11,     ///< Last widget of the asdfg row.

	OSK_WIDGET_ZXCVB_FIRST,                                  ///< First widget of the zxcvb row.
	OSK_WIDGET_ZXCVB_LAST = OSK_WIDGET_ZXCVB_FIRST + 11,     ///< Last widget of the zxcvb row.
};

char _keyboard_opt[2][OSK_KEYBOARD_ENTRIES * 4 + 1];
static WChar _keyboard[2][OSK_KEYBOARD_ENTRIES];

enum {
	KEYS_NONE,
	KEYS_SHIFT,
	KEYS_CAPS
};
static byte _keystate = KEYS_NONE;

struct OskWindow : public Window {
	StringID caption;      ///< the caption for this window.
	QueryString *qs;       ///< text-input
	int text_btn;          ///< widget number of parent's text field
	int ok_btn;            ///< widget number of parent's ok button (=0 when ok shouldn't be passed on)
	int cancel_btn;        ///< widget number of parent's cancel button (=0 when cancel shouldn't be passed on; text will be reverted to original)
	Textbuf *text;         ///< pointer to parent's textbuffer (to update caret position)
	char *orig_str_buf;    ///< Original string.
	bool shift;            ///< Is the shift effectively pressed?

	OskWindow(const WindowDesc *desc, QueryStringBaseWindow *parent, int button, int cancel, int ok) : Window()
	{
		this->parent = parent;
		assert(parent != NULL);

		NWidgetCore *par_wid = parent->GetWidget<NWidgetCore>(button);
		assert(par_wid != NULL);
		this->caption = (par_wid->widget_data != STR_NULL) ? par_wid->widget_data : parent->caption;

		this->qs         = parent;
		this->text_btn   = button;
		this->cancel_btn = cancel;
		this->ok_btn     = ok;
		this->text       = &parent->text;

		/* make a copy in case we need to reset later */
		this->orig_str_buf = strdup(this->qs->text.buf);

		this->InitNested(desc, 0);

		/* Not needed by default. */
		this->DisableWidget(OSK_WIDGET_SPECIAL);

		this->UpdateOskState();
	}

	~OskWindow()
	{
		free(this->orig_str_buf);
	}

	/**
	 * Only show valid characters; do not show characters that would
	 * only insert a space when we have a spacebar to do that or
	 * characters that are not allowed to be entered.
	 */
	void UpdateOskState()
	{
		this->shift = HasBit(_keystate, KEYS_CAPS) ^ HasBit(_keystate, KEYS_SHIFT);

		for (uint i = 0; i < OSK_KEYBOARD_ENTRIES; i++) {
			this->SetWidgetDisabledState(OSK_WIDGET_LETTERS + i,
					!IsValidChar(_keyboard[this->shift][i], this->qs->afilter) || _keyboard[this->shift][i] == ' ');
		}
		this->SetWidgetDisabledState(OSK_WIDGET_SPACE, !IsValidChar(' ', this->qs->afilter));

		this->LowerWidget(OSK_WIDGET_TEXT);
		this->SetWidgetLoweredState(OSK_WIDGET_SHIFT, HasBit(_keystate, KEYS_SHIFT));
		this->SetWidgetLoweredState(OSK_WIDGET_CAPS, HasBit(_keystate, KEYS_CAPS));
	}

	virtual void SetStringParameters(int widget) const
	{
		if (widget == OSK_WIDGET_CAPTION) SetDParam(0, this->caption);
	}

	virtual void DrawWidget(const Rect &r, int widget) const
	{
		if (widget < OSK_WIDGET_LETTERS) return;

		widget -= OSK_WIDGET_LETTERS;
		DrawCharCentered(_keyboard[this->shift][widget],
			r.left + 8,
			r.top + 3,
			TC_BLACK);
	}

	virtual void OnPaint()
	{
		this->DrawWidgets();

		this->qs->DrawEditBox(this, OSK_WIDGET_TEXT);
	}

	virtual void OnClick(Point pt, int widget, int click_count)
	{
		/* clicked a letter */
		if (widget >= OSK_WIDGET_LETTERS) {
			WChar c = _keyboard[this->shift][widget - OSK_WIDGET_LETTERS];

			if (!IsValidChar(c, this->qs->afilter)) return;

			if (InsertTextBufferChar(&this->qs->text, c)) this->InvalidateParent();

			if (HasBit(_keystate, KEYS_SHIFT)) {
				ToggleBit(_keystate, KEYS_SHIFT);
				this->GetWidget<NWidgetCore>(OSK_WIDGET_SHIFT)->colour = HasBit(_keystate, KEYS_SHIFT) ? COLOUR_WHITE : COLOUR_GREY;
				this->SetDirty();
			}
			return;
		}

		switch (widget) {
			case OSK_WIDGET_TEXT:
				/* Return focus to the parent widget and window. */
				this->parent->SetFocusedWidget(this->text_btn);
				SetFocusedWindow(this->parent);
				break;

			case OSK_WIDGET_BACKSPACE:
				if (DeleteTextBufferChar(&this->qs->text, WKC_BACKSPACE)) this->InvalidateParent();
				break;

			case OSK_WIDGET_SPECIAL:
				/*
				 * Anything device specific can go here.
				 * The button itself is hidden by default, and when you need it you
				 * can not hide it in the create event.
				 */
				break;

			case OSK_WIDGET_CAPS:
				ToggleBit(_keystate, KEYS_CAPS);
				this->UpdateOskState();
				this->SetDirty();
				break;

			case OSK_WIDGET_SHIFT:
				ToggleBit(_keystate, KEYS_SHIFT);
				this->UpdateOskState();
				this->SetDirty();
				break;

			case OSK_WIDGET_SPACE:
				if (InsertTextBufferChar(&this->qs->text, ' ')) this->InvalidateParent();
				break;

			case OSK_WIDGET_LEFT:
				if (MoveTextBufferPos(&this->qs->text, WKC_LEFT)) this->InvalidateParent();
				break;

			case OSK_WIDGET_RIGHT:
				if (MoveTextBufferPos(&this->qs->text, WKC_RIGHT)) this->InvalidateParent();
				break;

			case OSK_WIDGET_OK:
				if (this->qs->orig == NULL || strcmp(this->qs->text.buf, this->qs->orig) != 0) {
					/* pass information by simulating a button press on parent window */
					if (this->ok_btn != 0) {
						this->parent->OnClick(pt, this->ok_btn, 1);
						/* Window gets deleted when the parent window removes itself. */
						return;
					}
				}
				delete this;
				break;

			case OSK_WIDGET_CANCEL:
				if (this->cancel_btn != 0) { // pass a cancel event to the parent window
					this->parent->OnClick(pt, this->cancel_btn, 1);
					/* Window gets deleted when the parent window removes itself. */
					return;
				} else { // or reset to original string
					strcpy(qs->text.buf, this->orig_str_buf);
					UpdateTextBufferSize(&qs->text);
					MoveTextBufferPos(&qs->text, WKC_END);
					this->InvalidateParent();
					delete this;
				}
				break;
		}
	}

	void InvalidateParent()
	{
		QueryStringBaseWindow *w = dynamic_cast<QueryStringBaseWindow*>(this->parent);
		if (w != NULL) w->OnOSKInput(this->text_btn);

		this->SetWidgetDirty(OSK_WIDGET_TEXT);
		if (this->parent != NULL) this->parent->SetWidgetDirty(this->text_btn);
	}

	virtual void OnMouseLoop()
	{
		this->qs->HandleEditBox(this, OSK_WIDGET_TEXT);
		/* make the caret of the parent window also blink */
		this->parent->SetWidgetDirty(this->text_btn);
	}

	virtual void OnInvalidateData(int)
	{
		this->SetWidgetDirty(OSK_WIDGET_TEXT);
	}
};

static const int HALF_KEY_WIDTH = 7;  // Width of 1/2 key in pixels.
static const int INTER_KEY_SPACE = 2; // Number of pixels between two keys.

/**
 * Add a key widget to a row of the keyboard.
 * @param hor     Row container to add key widget to.
 * @param height  Height of the key (all keys in a row should have equal height).
 * @param num_half Number of 1/2 key widths that this key has.
 * @param widtype Widget type of the key. Must be either \c NWID_SPACER for an invisible key, or a \c WWT_* widget.
 * @param widnum  Widget number of the key.
 * @param widdata Data value of the key widget.
 * @param biggest_index Collected biggest widget index so far.
 * @note Key width is measured in 1/2 keys to allow for 1/2 key shifting between rows.
 */
static void AddKey(NWidgetHorizontal *hor, int height, int num_half, WidgetType widtype, int widnum, uint16 widdata, int *biggest_index)
{
	int key_width = HALF_KEY_WIDTH + (INTER_KEY_SPACE + HALF_KEY_WIDTH) * (num_half - 1);

	if (widtype == NWID_SPACER) {
		if (!hor->IsEmpty()) key_width += INTER_KEY_SPACE;
		NWidgetSpacer *spc = new NWidgetSpacer(key_width, height);
		hor->Add(spc);
	} else {
		if (!hor->IsEmpty()) {
			NWidgetSpacer *spc = new NWidgetSpacer(INTER_KEY_SPACE, height);
			hor->Add(spc);
		}
		NWidgetLeaf *leaf = new NWidgetLeaf(widtype, COLOUR_GREY, widnum, widdata, STR_NULL);
		leaf->SetMinimalSize(key_width, height);
		hor->Add(leaf);
	}

	*biggest_index = max(*biggest_index, widnum);
}

/** Construct the top row keys (cancel, ok, backspace). */
static NWidgetBase *MakeTopKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontal();
	int key_height = FONT_HEIGHT_NORMAL + 2;

	AddKey(hor, key_height, 6 * 2, WWT_TEXTBTN,    OSK_WIDGET_CANCEL,    STR_BUTTON_CANCEL,  biggest_index);
	AddKey(hor, key_height, 6 * 2, WWT_TEXTBTN,    OSK_WIDGET_OK,        STR_BUTTON_OK,      biggest_index);
	AddKey(hor, key_height, 2 * 2, WWT_PUSHIMGBTN, OSK_WIDGET_BACKSPACE, SPR_OSK_BACKSPACE, biggest_index);
	return hor;
}

/** Construct the row containing the digit keys. */
static NWidgetBase *MakeNumberKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontalLTR();
	int key_height = FONT_HEIGHT_NORMAL + 6;

	for (int widnum = OSK_WIDGET_NUMBERS_FIRST; widnum <= OSK_WIDGET_NUMBERS_LAST; widnum++) {
		AddKey(hor, key_height, 2, WWT_PUSHBTN, widnum, 0x0, biggest_index);
	}
	return hor;
}

/** Construct the qwerty row keys. */
static NWidgetBase *MakeQwertyKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontalLTR();
	int key_height = FONT_HEIGHT_NORMAL + 6;

	AddKey(hor, key_height, 3, WWT_PUSHIMGBTN, OSK_WIDGET_SPECIAL, SPR_OSK_SPECIAL, biggest_index);
	for (int widnum = OSK_WIDGET_QWERTY_FIRST; widnum <= OSK_WIDGET_QWERTY_LAST; widnum++) {
		AddKey(hor, key_height, 2, WWT_PUSHBTN, widnum, 0x0, biggest_index);
	}
	AddKey(hor, key_height, 1, NWID_SPACER, 0, 0, biggest_index);
	return hor;
}

/** Construct the asdfg row keys. */
static NWidgetBase *MakeAsdfgKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontalLTR();
	int key_height = FONT_HEIGHT_NORMAL + 6;

	AddKey(hor, key_height, 4, WWT_IMGBTN, OSK_WIDGET_CAPS, SPR_OSK_CAPS, biggest_index);
	for (int widnum = OSK_WIDGET_ASDFG_FIRST; widnum <= OSK_WIDGET_ASDFG_LAST; widnum++) {
		AddKey(hor, key_height, 2, WWT_PUSHBTN, widnum, 0x0, biggest_index);
	}
	return hor;
}

/** Construct the zxcvb row keys. */
static NWidgetBase *MakeZxcvbKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontalLTR();
	int key_height = FONT_HEIGHT_NORMAL + 6;

	AddKey(hor, key_height, 3, WWT_IMGBTN, OSK_WIDGET_SHIFT, SPR_OSK_SHIFT, biggest_index);
	for (int widnum = OSK_WIDGET_ZXCVB_FIRST; widnum <= OSK_WIDGET_ZXCVB_LAST; widnum++) {
		AddKey(hor, key_height, 2, WWT_PUSHBTN, widnum, 0x0, biggest_index);
	}
	AddKey(hor, key_height, 1, NWID_SPACER, 0, 0, biggest_index);
	return hor;
}

/** Construct the spacebar row keys. */
static NWidgetBase *MakeSpacebarKeys(int *biggest_index)
{
	NWidgetHorizontal *hor = new NWidgetHorizontal();
	int key_height = FONT_HEIGHT_NORMAL + 6;

	AddKey(hor, key_height,  8, NWID_SPACER, 0, 0, biggest_index);
	AddKey(hor, key_height, 13, WWT_PUSHTXTBTN, OSK_WIDGET_SPACE, STR_EMPTY, biggest_index);
	AddKey(hor, key_height,  3, NWID_SPACER, 0, 0, biggest_index);
	AddKey(hor, key_height,  2, WWT_PUSHIMGBTN, OSK_WIDGET_LEFT,  SPR_OSK_LEFT, biggest_index);
	AddKey(hor, key_height,  2, WWT_PUSHIMGBTN, OSK_WIDGET_RIGHT, SPR_OSK_RIGHT, biggest_index);
	return hor;
}


static const NWidgetPart _nested_osk_widgets[] = {
	NWidget(WWT_CAPTION, COLOUR_GREY, OSK_WIDGET_CAPTION), SetDataTip(STR_WHITE_STRING, STR_NULL),
	NWidget(WWT_PANEL, COLOUR_GREY),
		NWidget(WWT_EDITBOX, COLOUR_GREY, OSK_WIDGET_TEXT), SetMinimalSize(252, 12), SetPadding(2, 2, 2, 2),
	EndContainer(),
	NWidget(WWT_PANEL, COLOUR_GREY), SetPIP(5, 2, 3),
		NWidgetFunction(MakeTopKeys), SetPadding(0, 3, 0, 3),
		NWidgetFunction(MakeNumberKeys), SetPadding(0, 3, 0, 3),
		NWidgetFunction(MakeQwertyKeys), SetPadding(0, 3, 0, 3),
		NWidgetFunction(MakeAsdfgKeys), SetPadding(0, 3, 0, 3),
		NWidgetFunction(MakeZxcvbKeys), SetPadding(0, 3, 0, 3),
		NWidgetFunction(MakeSpacebarKeys), SetPadding(0, 3, 0, 3),
	EndContainer(),
};

static const WindowDesc _osk_desc(
	WDP_CENTER, 0, 0,
	WC_OSK, WC_NONE,
	WDF_UNCLICK_BUTTONS,
	_nested_osk_widgets, lengthof(_nested_osk_widgets)
);

/**
 * Retrieve keyboard layout from language string or (if set) config file.
 * Also check for invalid characters.
 */
void GetKeyboardLayout()
{
	char keyboard[2][OSK_KEYBOARD_ENTRIES * 4 + 1];
	char errormark[2][OSK_KEYBOARD_ENTRIES + 1]; // used for marking invalid chars
	bool has_error = false; // true when an invalid char is detected

	if (StrEmpty(_keyboard_opt[0])) {
		GetString(keyboard[0], STR_OSK_KEYBOARD_LAYOUT, lastof(keyboard[0]));
	} else {
		strecpy(keyboard[0], _keyboard_opt[0], lastof(keyboard[0]));
	}

	if (StrEmpty(_keyboard_opt[1])) {
		GetString(keyboard[1], STR_OSK_KEYBOARD_LAYOUT_CAPS, lastof(keyboard[1]));
	} else {
		strecpy(keyboard[1], _keyboard_opt[1], lastof(keyboard[1]));
	}

	for (uint j = 0; j < 2; j++) {
		const char *kbd = keyboard[j];
		bool ended = false;
		for (uint i = 0; i < OSK_KEYBOARD_ENTRIES; i++) {
			_keyboard[j][i] = Utf8Consume(&kbd);

			/* Be lenient when the last characters are missing (is quite normal) */
			if (_keyboard[j][i] == '\0' || ended) {
				ended = true;
				_keyboard[j][i] = ' ';
				continue;
			}

			if (IsPrintable(_keyboard[j][i])) {
				errormark[j][i] = ' ';
			} else {
				has_error = true;
				errormark[j][i] = '^';
				_keyboard[j][i] = ' ';
			}
		}
	}

	if (has_error) {
		ShowInfoF("The keyboard layout you selected contains invalid chars. Please check those chars marked with ^.");
		ShowInfoF("Normal keyboard:  %s", keyboard[0]);
		ShowInfoF("                  %s", errormark[0]);
		ShowInfoF("Caps Lock:        %s", keyboard[1]);
		ShowInfoF("                  %s", errormark[1]);
	}
}

/**
 * Show the on-screen keyboard (osk) associated with a given textbox
 * @param parent pointer to the Window where this keyboard originated from
 * @param button widget number of parent's textbox
 * @param cancel widget number of parent's cancel button (0 if cancel events
 *               should not be passed)
 * @param ok     widget number of parent's ok button  (0 if ok events should not
 *               be passed)
 */
void ShowOnScreenKeyboard(QueryStringBaseWindow *parent, int button, int cancel, int ok)
{
	DeleteWindowById(WC_OSK, 0);

	GetKeyboardLayout();
	new OskWindow(&_osk_desc, parent, button, cancel, ok);
}

/**
 * Updates the original text of the OSK so when the 'parent' changes the
 * original and you press on cancel you won't get the 'old' original text
 * but the updated one.
 * @param parent window that just updated its orignal text
 * @param button widget number of parent's textbox to update
 */
void UpdateOSKOriginalText(const QueryStringBaseWindow *parent, int button)
{
	OskWindow *osk = dynamic_cast<OskWindow *>(FindWindowById(WC_OSK, 0));
	if (osk == NULL || osk->qs != parent || osk->text_btn != button) return;

	free(osk->orig_str_buf);
	osk->orig_str_buf = strdup(osk->qs->text.buf);

	osk->SetDirty();
}