summaryrefslogtreecommitdiff
path: root/src/gui/widgets/textbox.cpp
blob: 60d8bd13b3280918655201d9b77154faab521848 (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
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
/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2015  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  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
 *  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, see <http://www.gnu.org/licenses/>.
 */

/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
 *
 *
 * Per Larsson a.k.a finalman
 * Olof Naessén a.k.a jansem/yakslem
 *
 * Visit: http://guichan.sourceforge.net
 *
 * License: (BSD)
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of Guichan nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "gui/widgets/textbox.h"

#include "input/inputaction.h"

#include "gui/gui.h"

#include "gui/fonts/font.h"

#include <sstream>

#include "debug.h"

TextBox::TextBox(const Widget2 *const widget) :
    Widget(widget),
    MouseListener(),
    KeyListener(),
    mTextRows(),
    mCaretColumn(0),
    mCaretRow(0),
    mMinWidth(getWidth()),
    mEditable(true),
    mOpaque(true)
{
    mAllowLogic = false;
    setText("");
    setFocusable(true);

    addMouseListener(this);
    addKeyListener(this);
    adjustSize();

    mForegroundColor = getThemeColor(Theme::TEXTBOX);
    setOpaque(false);
    setFrameSize(0);
}

TextBox::~TextBox()
{
    if (gui)
        gui->removeDragged(this);
}

void TextBox::setTextWrapped(const std::string &text, const int minDimension)
{
    // Make sure parent scroll area sets width of this widget
    if (getParent())
        getParent()->logic();

    // Take the supplied minimum dimension as a starting
    // point and try to beat it
    mMinWidth = minDimension;

    const size_t textSize = text.size();
    size_t spacePos = text.rfind(" ", textSize);

    if (spacePos != std::string::npos)
    {
        const std::string word = text.substr(spacePos + 1);
        const int length = getFont()->getWidth(word);

        if (length > mMinWidth)
            mMinWidth = length;
    }

    std::stringstream wrappedStream;
    size_t newlinePos;
    size_t lastNewlinePos = 0;
    int minWidth = 0;
    int xpos;

    do
    {
        // Determine next piece of string to wrap
        newlinePos = text.find("\n", lastNewlinePos);

        if (newlinePos == std::string::npos)
            newlinePos = textSize;

        std::string line =
            text.substr(lastNewlinePos, newlinePos - lastNewlinePos);
        size_t lastSpacePos = 0;
        xpos = 0;
        const Font *const font = getFont();
        const int spaceWidth = font->getWidth(" ");
        size_t sz = line.size();

        do
        {
            spacePos = line.find(" ", lastSpacePos);

            if (spacePos == std::string::npos)
                spacePos = sz;

            const std::string word =
                line.substr(lastSpacePos, spacePos - lastSpacePos);

            const int width = font->getWidth(word);

            if (xpos == 0 && width > mMinWidth)
            {
                mMinWidth = width;
                xpos = width;
                wrappedStream << word;
            }
            else if (xpos != 0 && xpos + spaceWidth + width <=
                     mMinWidth)
            {
                xpos += spaceWidth + width;
                wrappedStream << " " << word;
            }
            else if (lastSpacePos == 0)
            {
                xpos += width;
                wrappedStream << word;
            }
            else
            {
                if (xpos > minWidth)
                    minWidth = xpos;

                // The window wasn't big enough. Resize it and try again.
                if (minWidth > mMinWidth)
                {
                    mMinWidth = minWidth;
                    wrappedStream.clear();
                    wrappedStream.str("");
                    lastNewlinePos = 0;
                    newlinePos = text.find("\n", lastNewlinePos);
                    if (newlinePos == std::string::npos)
                        newlinePos = textSize;
                    line = text.substr(lastNewlinePos, newlinePos -
                                       lastNewlinePos);
                    sz = line.size();
                    break;
                }
                else
                {
                    wrappedStream << "\n" << word;
                }
                xpos = width;
            }
            lastSpacePos = spacePos + 1;
        }
        while (spacePos != sz);

        if (text.find("\n", lastNewlinePos) != std::string::npos)
            wrappedStream << "\n";

        lastNewlinePos = newlinePos + 1;
    }
    while (newlinePos != textSize);

    if (xpos > minWidth)
        minWidth = xpos;

    mMinWidth = minWidth;

    setText(wrappedStream.str());
}

void TextBox::setText(const std::string& text)
{
    mCaretColumn = 0;
    mCaretRow = 0;

    mTextRows.clear();
    if (text.empty())
    {
        adjustSize();
        return;
    }

    size_t pos;
    size_t lastPos = 0;
    int length;
    do
    {
        pos = text.find("\n", lastPos);

        if (pos != std::string::npos)
            length = static_cast<int>(pos - lastPos);
        else
            length = static_cast<int>(text.size() - lastPos);
        std::string sub = text.substr(lastPos, length);
        mTextRows.push_back(sub);
        lastPos = pos + 1;
    } while (pos != std::string::npos);

    adjustSize();
}

void TextBox::keyPressed(KeyEvent& event)
{
    const Key &key = event.getKey();
    const int action = event.getActionId();

    switch (action)
    {
        case InputAction::GUI_LEFT:
        {
            --mCaretColumn;
            if (mCaretColumn < 0)
            {
                --mCaretRow;

                if (mCaretRow < 0)
                {
                    mCaretRow = 0;
                    mCaretColumn = 0;
                }
                else
                {
                    mCaretColumn = static_cast<int>(
                        mTextRows[mCaretRow].size());
                }
            }
            break;
        }

        case InputAction::GUI_RIGHT:
        {
            ++mCaretColumn;
            if (mCaretColumn > static_cast<int>(mTextRows[mCaretRow].size()))
            {
                ++ mCaretRow;

                const int sz = static_cast<int>(mTextRows.size());
                if (mCaretRow >= sz)
                {
                    mCaretRow = sz - 1;
                    if (mCaretRow < 0)
                        mCaretRow = 0;

                    mCaretColumn = static_cast<int>(
                        mTextRows[mCaretRow].size());
                }
                else
                {
                    mCaretColumn = 0;
                }
            }
            break;
        }

        case InputAction::GUI_DOWN:
        {
            setCaretRow(mCaretRow + 1);
            break;
        }
        case InputAction::GUI_UP:
        {
            setCaretRow(mCaretRow - 1);
            break;
        }
        case InputAction::GUI_HOME:
        {
            mCaretColumn = 0;
            break;
        }
        case InputAction::GUI_END:
        {
            mCaretColumn = static_cast<int>(mTextRows[mCaretRow].size());
            break;
        }

        case InputAction::GUI_SELECT2:
        {
            if (mEditable)
            {
                mTextRows.insert(mTextRows.begin() + mCaretRow + 1,
                    mTextRows[mCaretRow].substr(mCaretColumn,
                    mTextRows[mCaretRow].size() - mCaretColumn));
                mTextRows[mCaretRow].resize(mCaretColumn);
                ++mCaretRow;
                mCaretColumn = 0;
            }
            break;
        }

        case InputAction::GUI_BACKSPACE:
        {
            if (mCaretColumn != 0 && mEditable)
            {
                mTextRows[mCaretRow].erase(mCaretColumn - 1, 1);
                --mCaretColumn;
            }
            else if (mCaretColumn == 0 && mCaretRow != 0 && mEditable)
            {
                mCaretColumn = static_cast<int>(
                    mTextRows[mCaretRow - 1].size());
                mTextRows[mCaretRow - 1] += mTextRows[mCaretRow];
                mTextRows.erase(mTextRows.begin() + mCaretRow);
                --mCaretRow;
            }
            break;
        }

        case InputAction::GUI_DELETE:
        {
            if (mCaretColumn < static_cast<int>(
                mTextRows[mCaretRow].size()) && mEditable)
            {
                mTextRows[mCaretRow].erase(mCaretColumn, 1);
            }
            else if (mCaretColumn == static_cast<int>(
                     mTextRows[mCaretRow].size()) &&
                     mCaretRow < (static_cast<int>(mTextRows.size()) - 1) &&
                     mEditable)
            {
                mTextRows[mCaretRow] += mTextRows[mCaretRow + 1];
                mTextRows.erase(mTextRows.begin() + mCaretRow + 1);
            }
            break;
        }

        case InputAction::GUI_PAGE_UP:
        {
            Widget *const par = getParent();

            if (par)
            {
                const int rowsPerPage = par->getChildrenArea().height
                    / getFont()->getHeight();
                mCaretRow -= rowsPerPage;

                if (mCaretRow < 0)
                    mCaretRow = 0;
            }
            break;
        }

        case InputAction::GUI_PAGE_DOWN:
        {
            Widget *const par = getParent();

            if (par)
            {
                const int rowsPerPage = par->getChildrenArea().height
                    / getFont()->getHeight();
                mCaretRow += rowsPerPage;

                const int sz = static_cast<int>(mTextRows.size());
                if (mCaretRow >= sz)
                    mCaretRow = sz - 1;
            }
            break;
        }

        case InputAction::GUI_TAB:
        {
            if (mEditable)
            {
                mTextRows[mCaretRow].insert(mCaretColumn, std::string("    "));
                mCaretColumn += 4;
            }
            break;
        }

        default:
        {
            if (key.isCharacter() && mEditable)
            {
                mTextRows[mCaretRow].insert(mCaretColumn,
                    std::string(1, static_cast<signed char>(key.getValue())));
                ++ mCaretColumn;
            }
            break;
        }
    }

    adjustSize();
    scrollToCaret();

    event.consume();
}

void TextBox::draw(Graphics* graphics)
{
    BLOCK_START("TextBox::draw")
    if (mOpaque)
    {
        graphics->setColor(mBackgroundColor);
        graphics->fillRectangle(Rect(0, 0, getWidth(), getHeight()));
    }

    Font *const font = getFont();
    if (isFocused() && isEditable())
    {
        drawCaret(graphics, font->getWidth(
            mTextRows[mCaretRow].substr(0, mCaretColumn)),
            mCaretRow * font->getHeight());
    }

    const int fontHeight = font->getHeight();

    for (size_t i = 0, sz = mTextRows.size(); i < sz; i++)
    {
        // Move the text one pixel so we can have a caret before a letter.
        font->drawString(graphics,
            mForegroundColor,
            mForegroundColor2,
            mTextRows[i], 1,
            static_cast<int>(i * static_cast<size_t>(fontHeight)));
    }
    BLOCK_END("TextBox::draw")
}

void TextBox::safeDraw(Graphics* graphics)
{
    TextBox::draw(graphics);
}

void TextBox::setForegroundColor(const Color &color)
{
    mForegroundColor = color;
    mForegroundColor2 = color;
}

void TextBox::setForegroundColorAll(const Color &color1,
                                    const Color &color2)
{
    mForegroundColor = color1;
    mForegroundColor2 = color2;
}

std::string TextBox::getText() const
{
    if (mTextRows.empty())
        return std::string("");

    int i;
    std::string text;

    const int sz = static_cast<int>(mTextRows.size());
    for (i = 0; i < sz - 1; ++ i)
        text.append(mTextRows[i]).append("\n");
    text.append(mTextRows[i]);

    return text;
}

void TextBox::setTextRow(const int row, const std::string& text)
{
    mTextRows[row] = text;

    if (mCaretRow == row)
        setCaretColumn(mCaretColumn);

    adjustSize();
}

void TextBox::setCaretPosition(unsigned int position)
{
    for (int row = 0, sz = static_cast<int>(mTextRows.size());
         row < sz; row ++)
    {
        if (position <= mTextRows[row].size())
        {
            mCaretRow = row;
            mCaretColumn = position;
            return;  // we are done
        }
        else
        {
            position--;
        }
    }

    // position beyond end of text
    mCaretRow = static_cast<int>(mTextRows.size() - 1);
    mCaretColumn = static_cast<int>(mTextRows[mCaretRow].size());
}

void TextBox::setCaretRow(const int row)
{
    mCaretRow = row;

    const int sz = static_cast<int>(mTextRows.size());
    if (mCaretRow >= sz)
        mCaretRow = sz - 1;

    if (mCaretRow < 0)
        mCaretRow = 0;

    setCaretColumn(mCaretColumn);
}

unsigned int TextBox::getCaretPosition() const
{
    int pos = 0, row;

    for (row = 0; row < mCaretRow; row++)
        pos += static_cast<int>(mTextRows[row].size());

    return pos + mCaretColumn;
}

void TextBox::setCaretColumn(const int column)
{
    mCaretColumn = column;

    const int sz = static_cast<int>(mTextRows[mCaretRow].size());
    if (mCaretColumn > sz)
        mCaretColumn = sz;

    if (mCaretColumn < 0)
        mCaretColumn = 0;
}

void TextBox::setCaretRowColumn(const int row, const int column)
{
    setCaretRow(row);
    setCaretColumn(column);
}

void TextBox::scrollToCaret()
{
    const Font *const font = getFont();
    Rect scroll;
    scroll.x = font->getWidth(mTextRows[mCaretRow].substr(0, mCaretColumn));
    scroll.y = font->getHeight() * mCaretRow;
    scroll.width = font->getWidth(" ");
    // add 2 for some extra space
    scroll.height = font->getHeight() + 2;
    showPart(scroll);
}

void TextBox::addRow(const std::string &row)
{
    mTextRows.push_back(row);
    adjustSize();
}

void TextBox::mousePressed(MouseEvent& event)
{
    if (event.getButton() == MouseButton::LEFT)
    {
        const int height = getFont()->getHeight();
        if (!height)
            return;

        event.consume();
        mCaretRow = event.getY() / height;

        const int sz = static_cast<int>(mTextRows.size());
        if (mCaretRow >= sz)
            mCaretRow = sz - 1;

        mCaretColumn = getFont()->getStringIndexAt(
            mTextRows[mCaretRow], event.getX());
    }
}

void TextBox::mouseDragged(MouseEvent& event)
{
    event.consume();
}

void TextBox::drawCaret(Graphics *const graphics, const int x, const int y)
{
    graphics->setColor(mForegroundColor);
    graphics->drawLine(x, getFont()->getHeight() + y, x, y);
}

void TextBox::adjustSize()
{
    int width = 0;
    const Font *const font = getFont();
    for (size_t i = 0, sz = mTextRows.size(); i < sz; ++i)
    {
        const int w = font->getWidth(mTextRows[i]);
        if (width < w)
            width = w;
    }

    setWidth(width + 1);
    setHeight(font->getHeight() * static_cast<int>(mTextRows.size()));
}