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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2015 Victor Anjin <virinext@gmail.com> | |
5 | * Copyright (C) 2019 Soeren Apel <soeren@apelpie.net> | |
6 | * | |
7 | * The MIT License (MIT) | |
8 | * | |
9 | * Copyright (c) 2015 | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in all | |
19 | * copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
28 | */ | |
29 | ||
30 | #include <QApplication> | |
31 | #include <QClipboard> | |
32 | #include <QFont> | |
33 | #include <QKeyEvent> | |
34 | #include <QScrollBar> | |
35 | #include <QSize> | |
36 | #include <QPainter> | |
37 | #include <QPaintEvent> | |
38 | ||
39 | #include "QHexView.hpp" | |
40 | ||
41 | using std::size_t; | |
42 | ||
43 | const unsigned int HEXCHARS_IN_LINE = 47; | |
44 | const unsigned int GAP_ADR_HEX = 10; | |
45 | const unsigned int GAP_HEX_ASCII = 16; | |
46 | const unsigned int BYTES_PER_LINE = 16; | |
47 | ||
48 | ||
49 | DataStorageArray::DataStorageArray(const QByteArray &arr) | |
50 | { | |
51 | data_ = arr; | |
52 | } | |
53 | ||
54 | QByteArray DataStorageArray::getData(size_t position, size_t length) | |
55 | { | |
56 | return data_.mid(position, length); | |
57 | } | |
58 | ||
59 | size_t DataStorageArray::size() | |
60 | { | |
61 | return data_.count(); | |
62 | } | |
63 | ||
64 | ||
65 | ||
66 | QHexView::QHexView(QWidget *parent): | |
67 | QAbstractScrollArea(parent), | |
68 | pdata_(nullptr) | |
69 | { | |
70 | setFont(QFont("Courier", 10)); | |
71 | ||
72 | charWidth_ = fontMetrics().width(QLatin1Char('9')); | |
73 | charHeight_ = fontMetrics().height(); | |
74 | ||
75 | posAddr_ = 0; | |
76 | posHex_ = 10 * charWidth_ + GAP_ADR_HEX; | |
77 | posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII; | |
78 | ||
79 | setMinimumWidth(posAscii_ + (BYTES_PER_LINE * charWidth_)); | |
80 | ||
81 | setFocusPolicy(Qt::StrongFocus); | |
82 | } | |
83 | ||
84 | QHexView::~QHexView() | |
85 | { | |
86 | if (pdata_) | |
87 | delete pdata_; | |
88 | } | |
89 | ||
90 | void QHexView::setData(DataStorage *pData) | |
91 | { | |
92 | verticalScrollBar()->setValue(0); | |
93 | ||
94 | if (pdata_) | |
95 | delete pdata_; | |
96 | ||
97 | pdata_ = pData; | |
98 | cursorPos_ = 0; | |
99 | resetSelection(0); | |
100 | } | |
101 | ||
102 | void QHexView::showFromOffset(size_t offset) | |
103 | { | |
104 | if (pdata_ && (offset < pdata_->size())) { | |
105 | setCursorPos(offset * 2); | |
106 | ||
107 | int cursorY = cursorPos_ / (2 * BYTES_PER_LINE); | |
108 | verticalScrollBar() -> setValue(cursorY); | |
109 | } | |
110 | } | |
111 | ||
112 | void QHexView::clear() | |
113 | { | |
114 | verticalScrollBar()->setValue(0); | |
115 | } | |
116 | ||
117 | QSize QHexView::fullSize() const | |
118 | { | |
119 | if (!pdata_) | |
120 | return QSize(0, 0); | |
121 | ||
122 | size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_); | |
123 | size_t height = pdata_->size() / BYTES_PER_LINE; | |
124 | if (pdata_->size() % BYTES_PER_LINE) | |
125 | height++; | |
126 | ||
127 | height *= charHeight_; | |
128 | ||
129 | return QSize(width, height); | |
130 | } | |
131 | ||
132 | void QHexView::paintEvent(QPaintEvent *event) | |
133 | { | |
134 | if (!pdata_) | |
135 | return; | |
136 | ||
137 | QPainter painter(viewport()); | |
138 | ||
139 | QSize areaSize = viewport()->size(); | |
140 | QSize widgetSize = fullSize(); | |
141 | verticalScrollBar()->setPageStep(areaSize.height() / charHeight_); | |
142 | verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1); | |
143 | ||
144 | size_t firstLineIdx = verticalScrollBar()->value(); | |
145 | ||
146 | size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_; | |
147 | if (lastLineIdx > (pdata_->size() / BYTES_PER_LINE)) { | |
148 | lastLineIdx = pdata_->size() / BYTES_PER_LINE; | |
149 | if (pdata_->size() % BYTES_PER_LINE) | |
150 | lastLineIdx++; | |
151 | } | |
152 | ||
153 | painter.fillRect(event->rect(), this->palette().color(QPalette::Base)); | |
154 | ||
155 | QColor addressAreaColor = QColor(0xd4, 0xd4, 0xd4, 0xff); | |
156 | painter.fillRect(QRect(posAddr_, event->rect().top(), | |
157 | posHex_ - GAP_ADR_HEX + 2, height()), addressAreaColor); | |
158 | ||
159 | int linePos = posAscii_ - (GAP_HEX_ASCII / 2); | |
160 | painter.setPen(Qt::gray); | |
161 | ||
162 | painter.drawLine(linePos, event->rect().top(), linePos, height()); | |
163 | ||
164 | painter.setPen(Qt::black); | |
165 | ||
166 | int yPosStart = charHeight_; | |
167 | ||
168 | QBrush def = painter.brush(); | |
169 | QBrush selected = QBrush(QColor(0x6d, 0x9e, 0xff, 0xff)); | |
170 | QByteArray data = pdata_->getData(firstLineIdx * BYTES_PER_LINE, (lastLineIdx - firstLineIdx) * BYTES_PER_LINE); | |
171 | ||
172 | for (size_t lineIdx = firstLineIdx, yPos = yPosStart; lineIdx < lastLineIdx; lineIdx++) { | |
173 | QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')); | |
174 | painter.drawText(posAddr_, yPos, address); | |
175 | ||
176 | int xPos = posHex_; | |
177 | for (size_t i = 0; i < BYTES_PER_LINE && ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size(); i++) { | |
178 | size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2; | |
179 | if ((pos >= selectBegin_) && (pos < selectEnd_)) { | |
180 | painter.setBackground(selected); | |
181 | painter.setBackgroundMode(Qt::OpaqueMode); | |
182 | } | |
183 | ||
184 | QString val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF0) >> 4, 16); | |
185 | painter.drawText(xPos, yPos, val); | |
186 | ||
187 | if (((pos+1) >= selectBegin_) && ((pos+1) < selectEnd_)) { | |
188 | painter.setBackground(selected); | |
189 | painter.setBackgroundMode(Qt::OpaqueMode); | |
190 | } else { | |
191 | painter.setBackground(def); | |
192 | painter.setBackgroundMode(Qt::OpaqueMode); | |
193 | } | |
194 | ||
195 | val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF), 16); | |
196 | painter.drawText(xPos + charWidth_, yPos, val); | |
197 | ||
198 | painter.setBackground(def); | |
199 | painter.setBackgroundMode(Qt::OpaqueMode); | |
200 | ||
201 | xPos += 3 * charWidth_; | |
202 | } | |
203 | ||
204 | int xPosAscii = posAscii_; | |
205 | for (size_t i = 0; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size() && (i < BYTES_PER_LINE); i++) { | |
206 | char ch = data[(unsigned int)((lineIdx - firstLineIdx) * BYTES_PER_LINE + i)]; | |
207 | ||
208 | if ((ch < 0x20) || (ch > 0x7e)) | |
209 | ch = '.'; | |
210 | ||
211 | painter.drawText(xPosAscii, yPos, QString(ch)); | |
212 | xPosAscii += charWidth_; | |
213 | } | |
214 | ||
215 | yPos += charHeight_; | |
216 | } | |
217 | ||
218 | if (hasFocus()) { | |
219 | int x = (cursorPos_ % (2 * BYTES_PER_LINE)); | |
220 | int y = cursorPos_ / (2 * BYTES_PER_LINE); | |
221 | y -= firstLineIdx; | |
222 | int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_; | |
223 | int cursorY = y * charHeight_ + 4; | |
224 | painter.fillRect(cursorX, cursorY, 2, charHeight_, this->palette().color(QPalette::WindowText)); | |
225 | } | |
226 | } | |
227 | ||
228 | void QHexView::keyPressEvent(QKeyEvent *event) | |
229 | { | |
230 | bool setVisible = false; | |
231 | ||
232 | /*****************************************************************************/ | |
233 | /* Cursor movements */ | |
234 | /*****************************************************************************/ | |
235 | if (event->matches(QKeySequence::MoveToNextChar)) { | |
236 | setCursorPos(cursorPos_ + 1); | |
237 | resetSelection(cursorPos_); | |
238 | setVisible = true; | |
239 | } | |
240 | if (event->matches(QKeySequence::MoveToPreviousChar)) { | |
241 | setCursorPos(cursorPos_ - 1); | |
242 | resetSelection(cursorPos_); | |
243 | setVisible = true; | |
244 | } | |
245 | ||
246 | if (event->matches(QKeySequence::MoveToEndOfLine)) { | |
247 | setCursorPos(cursorPos_ | ((BYTES_PER_LINE * 2) - 1)); | |
248 | resetSelection(cursorPos_); | |
249 | setVisible = true; | |
250 | } | |
251 | if (event->matches(QKeySequence::MoveToStartOfLine)) { | |
252 | setCursorPos(cursorPos_ | (cursorPos_ % (BYTES_PER_LINE * 2))); | |
253 | resetSelection(cursorPos_); | |
254 | setVisible = true; | |
255 | } | |
256 | if (event->matches(QKeySequence::MoveToPreviousLine)) { | |
257 | setCursorPos(cursorPos_ - BYTES_PER_LINE * 2); | |
258 | resetSelection(cursorPos_); | |
259 | setVisible = true; | |
260 | } | |
261 | if (event->matches(QKeySequence::MoveToNextLine)) { | |
262 | setCursorPos(cursorPos_ + BYTES_PER_LINE * 2); | |
263 | resetSelection(cursorPos_); | |
264 | setVisible = true; | |
265 | } | |
266 | ||
267 | if (event->matches(QKeySequence::MoveToNextPage)) { | |
268 | setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE); | |
269 | resetSelection(cursorPos_); | |
270 | setVisible = true; | |
271 | } | |
272 | if (event->matches(QKeySequence::MoveToPreviousPage)) { | |
273 | setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE); | |
274 | resetSelection(cursorPos_); | |
275 | setVisible = true; | |
276 | } | |
277 | if (event->matches(QKeySequence::MoveToEndOfDocument)) { | |
278 | if (pdata_) | |
279 | setCursorPos(pdata_->size() * 2); | |
280 | resetSelection(cursorPos_); | |
281 | setVisible = true; | |
282 | } | |
283 | if (event->matches(QKeySequence::MoveToStartOfDocument)) { | |
284 | setCursorPos(0); | |
285 | resetSelection(cursorPos_); | |
286 | setVisible = true; | |
287 | } | |
288 | ||
289 | /*****************************************************************************/ | |
290 | /* Select commands */ | |
291 | /*****************************************************************************/ | |
292 | if (event->matches(QKeySequence::SelectAll)) { | |
293 | resetSelection(0); | |
294 | if (pdata_) | |
295 | setSelection(2 * pdata_->size() + 1); | |
296 | setVisible = true; | |
297 | } | |
298 | if (event->matches(QKeySequence::SelectNextChar)) { | |
299 | int pos = cursorPos_ + 1; | |
300 | setCursorPos(pos); | |
301 | setSelection(pos); | |
302 | setVisible = true; | |
303 | } | |
304 | if (event->matches(QKeySequence::SelectPreviousChar)) { | |
305 | int pos = cursorPos_ - 1; | |
306 | setSelection(pos); | |
307 | setCursorPos(pos); | |
308 | setVisible = true; | |
309 | } | |
310 | if (event->matches(QKeySequence::SelectEndOfLine)) { | |
311 | int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE); | |
312 | setCursorPos(pos); | |
313 | setSelection(pos); | |
314 | setVisible = true; | |
315 | } | |
316 | if (event->matches(QKeySequence::SelectStartOfLine)) { | |
317 | int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)); | |
318 | setCursorPos(pos); | |
319 | setSelection(pos); | |
320 | setVisible = true; | |
321 | } | |
322 | if (event->matches(QKeySequence::SelectPreviousLine)) { | |
323 | int pos = cursorPos_ - (2 * BYTES_PER_LINE); | |
324 | setCursorPos(pos); | |
325 | setSelection(pos); | |
326 | setVisible = true; | |
327 | } | |
328 | if (event->matches(QKeySequence::SelectNextLine)) { | |
329 | int pos = cursorPos_ + (2 * BYTES_PER_LINE); | |
330 | setCursorPos(pos); | |
331 | setSelection(pos); | |
332 | setVisible = true; | |
333 | } | |
334 | ||
335 | if (event->matches(QKeySequence::SelectNextPage)) { | |
336 | int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE); | |
337 | setCursorPos(pos); | |
338 | setSelection(pos); | |
339 | setVisible = true; | |
340 | } | |
341 | if (event->matches(QKeySequence::SelectPreviousPage)) { | |
342 | int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE); | |
343 | setCursorPos(pos); | |
344 | setSelection(pos); | |
345 | setVisible = true; | |
346 | } | |
347 | if (event->matches(QKeySequence::SelectEndOfDocument)) { | |
348 | int pos = 0; | |
349 | if (pdata_) | |
350 | pos = pdata_->size() * 2; | |
351 | setCursorPos(pos); | |
352 | setSelection(pos); | |
353 | setVisible = true; | |
354 | } | |
355 | if (event->matches(QKeySequence::SelectStartOfDocument)) { | |
356 | int pos = 0; | |
357 | setCursorPos(pos); | |
358 | setSelection(pos); | |
359 | setVisible = true; | |
360 | } | |
361 | ||
362 | if (event->matches(QKeySequence::Copy) && (pdata_)) { | |
363 | QString text; | |
364 | int idx = 0; | |
365 | int copyOffset = 0; | |
366 | ||
367 | QByteArray data = pdata_->getData(selectBegin_ / 2, (selectEnd_ - selectBegin_) / 2 + 1); | |
368 | if (selectBegin_ % 2) { | |
369 | text += QString::number((data.at((idx+1) / 2) & 0xF), 16); | |
370 | text += " "; | |
371 | idx++; | |
372 | copyOffset = 1; | |
373 | } | |
374 | ||
375 | int selectedSize = selectEnd_ - selectBegin_; | |
376 | while (idx < selectedSize) { | |
377 | QString val = QString::number((data.at((copyOffset + idx) / 2) & 0xF0) >> 4, 16); | |
378 | if ((idx + 1) < selectedSize) { | |
379 | val += QString::number((data.at((copyOffset + idx) / 2) & 0xF), 16); | |
380 | val += " "; | |
381 | } | |
382 | text += val; | |
383 | ||
384 | if ((idx/2) % BYTES_PER_LINE == (BYTES_PER_LINE - 1)) | |
385 | text += "\n"; | |
386 | ||
387 | idx += 2; | |
388 | } | |
389 | ||
390 | QClipboard *clipboard = QApplication::clipboard(); | |
391 | clipboard->setText(text); | |
392 | if (clipboard->supportsSelection()) | |
393 | clipboard->setText(text); | |
394 | } | |
395 | ||
396 | if (setVisible) | |
397 | ensureVisible(); | |
398 | ||
399 | viewport()->update(); | |
400 | } | |
401 | ||
402 | void QHexView::mouseMoveEvent(QMouseEvent *event) | |
403 | { | |
404 | int actPos = cursorPos(event->pos()); | |
405 | setCursorPos(actPos); | |
406 | setSelection(actPos); | |
407 | ||
408 | viewport()->update(); | |
409 | } | |
410 | ||
411 | void QHexView::mousePressEvent(QMouseEvent *event) | |
412 | { | |
413 | int cPos = cursorPos(event->pos()); | |
414 | ||
415 | if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton)) | |
416 | setSelection(cPos); | |
417 | else | |
418 | resetSelection(cPos); | |
419 | ||
420 | setCursorPos(cPos); | |
421 | ||
422 | viewport()->update(); | |
423 | } | |
424 | ||
425 | size_t QHexView::cursorPos(const QPoint &position) | |
426 | { | |
427 | int pos = -1; | |
428 | ||
429 | if (((size_t)position.x() >= posHex_) && | |
430 | ((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) { | |
431 | ||
432 | int x = (position.x() - posHex_) / charWidth_; | |
433 | ||
434 | if ((x % 3) == 0) | |
435 | x = (x / 3) * 2; | |
436 | else | |
437 | x = ((x / 3) * 2) + 1; | |
438 | ||
439 | int firstLineIdx = verticalScrollBar()->value(); | |
440 | int y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE; | |
441 | pos = x + y + firstLineIdx * BYTES_PER_LINE * 2; | |
442 | } | |
443 | ||
444 | return pos; | |
445 | } | |
446 | ||
447 | void QHexView::resetSelection() | |
448 | { | |
449 | selectBegin_ = selectInit_; | |
450 | selectEnd_ = selectInit_; | |
451 | } | |
452 | ||
453 | void QHexView::resetSelection(int pos) | |
454 | { | |
455 | if (pos < 0) | |
456 | pos = 0; | |
457 | ||
458 | selectInit_ = pos; | |
459 | selectBegin_ = pos; | |
460 | selectEnd_ = pos; | |
461 | } | |
462 | ||
463 | void QHexView::setSelection(int pos) | |
464 | { | |
465 | if (pos < 0) | |
466 | pos = 0; | |
467 | ||
468 | if ((size_t)pos >= selectInit_) { | |
469 | selectEnd_ = pos; | |
470 | selectBegin_ = selectInit_; | |
471 | } else { | |
472 | selectBegin_ = pos; | |
473 | selectEnd_ = selectInit_; | |
474 | } | |
475 | } | |
476 | ||
477 | void QHexView::setCursorPos(int position) | |
478 | { | |
479 | if (position < 0) | |
480 | position = 0; | |
481 | ||
482 | int maxPos = 0; | |
483 | if (pdata_) { | |
484 | maxPos = pdata_->size() * 2; | |
485 | if (pdata_->size() % BYTES_PER_LINE) | |
486 | maxPos++; | |
487 | } | |
488 | ||
489 | if (position > maxPos) | |
490 | position = maxPos; | |
491 | ||
492 | cursorPos_ = position; | |
493 | } | |
494 | ||
495 | void QHexView::ensureVisible() | |
496 | { | |
497 | QSize areaSize = viewport()->size(); | |
498 | ||
499 | int firstLineIdx = verticalScrollBar() -> value(); | |
500 | int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_; | |
501 | ||
502 | int cursorY = cursorPos_ / (2 * BYTES_PER_LINE); | |
503 | ||
504 | if (cursorY < firstLineIdx) | |
505 | verticalScrollBar() -> setValue(cursorY); | |
506 | else if(cursorY >= lastLineIdx) | |
507 | verticalScrollBar() -> setValue(cursorY - areaSize.height() / charHeight_ + 1); | |
508 | } |