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HexView: Add top row with offsets
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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 <QDebug>
33#include <QFont>
34#include <QKeyEvent>
35#include <QScrollBar>
36#include <QSize>
37#include <QPainter>
38#include <QPaintEvent>
39
40#include "QHexView.hpp"
41
42const unsigned int BYTES_PER_LINE = 16;
43const unsigned int HEXCHARS_IN_LINE = BYTES_PER_LINE * 3 - 1;
44const unsigned int GAP_ADR_HEX = 10;
45const unsigned int GAP_HEX_ASCII = 10;
46const unsigned int GAP_ASCII_SLIDER = 5;
47
48
49QHexView::QHexView(QWidget *parent):
50 QAbstractScrollArea(parent),
51 mode_(ChunkedDataMode),
52 data_(nullptr),
53 selectBegin_(0),
54 selectEnd_(0),
55 cursorPos_(0)
56{
57 setFont(QFont("Courier", 10));
58
59 charWidth_ = fontMetrics().boundingRect('X').width();
60 charHeight_ = fontMetrics().height();
61
62 // Determine X coordinates of the three sub-areas
63 posAddr_ = 0;
64 posHex_ = 10 * charWidth_ + GAP_ADR_HEX;
65 posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;
66
67 setFocusPolicy(Qt::StrongFocus);
68
69 if (palette().color(QPalette::ButtonText).toHsv().value() > 127) {
70 // Color is bright
71 chunk_colors_.emplace_back(100, 149, 237); // QColorConstants::Svg::cornflowerblue
72 chunk_colors_.emplace_back(60, 179, 113); // QColorConstants::Svg::mediumseagreen
73 chunk_colors_.emplace_back(210, 180, 140); // QColorConstants::Svg::tan
74 } else {
75 // Color is dark
76 chunk_colors_.emplace_back(0, 0, 139); // QColorConstants::Svg::darkblue
77 chunk_colors_.emplace_back(34, 139, 34); // QColorConstants::Svg::forestgreen
78 chunk_colors_.emplace_back(160, 82, 45); // QColorConstants::Svg::sienna
79 }
80}
81
82void QHexView::set_mode(Mode m)
83{
84 mode_ = m;
85
86 // This is not expected to be set when data is showing,
87 // so we don't update the viewport here
88}
89
90void QHexView::set_data(const DecodeBinaryClass* data)
91{
92 data_ = data;
93
94 size_t size = 0;
95 if (data) {
96 size_t chunks = data_->chunks.size();
97 for (size_t i = 0; i < chunks; i++)
98 size += data_->chunks[i].data.size();
99 }
100 data_size_ = size;
101
102 viewport()->update();
103}
104
105unsigned int QHexView::get_bytes_per_line() const
106{
107 return BYTES_PER_LINE;
108}
109
110void QHexView::clear()
111{
112 verticalScrollBar()->setValue(0);
113 data_ = nullptr;
114 data_size_ = 0;
115
116 viewport()->update();
117}
118
119void QHexView::showFromOffset(size_t offset)
120{
121 if (data_ && (offset < data_size_)) {
122 setCursorPos(offset * 2);
123
124 int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
125 verticalScrollBar() -> setValue(cursorY);
126 }
127
128 viewport()->update();
129}
130
131QSizePolicy QHexView::sizePolicy() const
132{
133 return QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
134}
135
136pair<size_t, size_t> QHexView::get_selection() const
137{
138 size_t start = selectBegin_ / 2;
139 size_t end = selectEnd_ / 2;
140
141 if (start == end) {
142 // Nothing is currently selected
143 start = 0;
144 end = data_size_;
145 } else
146 end++;
147
148 return std::make_pair(start, end);
149}
150
151size_t QHexView::create_hex_line(size_t start, size_t end, QString* dest,
152 bool with_offset, bool with_ascii)
153{
154 dest->clear();
155
156 // Determine start address for the row
157 uint64_t row = start / BYTES_PER_LINE;
158 uint64_t offset = row * BYTES_PER_LINE;
159 end = std::min((uint64_t)end, offset + BYTES_PER_LINE);
160
161 if (with_offset)
162 dest->append(QString("%1 ").arg(row * BYTES_PER_LINE, 10, 16, QChar('0')).toUpper());
163
164 initialize_byte_iterator(offset);
165 for (size_t i = offset; i < offset + BYTES_PER_LINE; i++) {
166 uint8_t value = 0;
167
168 if (i < end)
169 value = get_next_byte();
170
171 if ((i < start) || (i >= end))
172 dest->append(" ");
173 else
174 dest->append(QString("%1 ").arg(value, 2, 16, QChar('0')).toUpper());
175 }
176
177 if (with_ascii) {
178 initialize_byte_iterator(offset);
179 for (size_t i = offset; i < end; i++) {
180 uint8_t value = get_next_byte();
181
182 if ((value < 0x20) || (value > 0x7E))
183 value = '.';
184
185 if (i < start)
186 dest->append(' ');
187 else
188 dest->append((char)value);
189 }
190 }
191
192 return end;
193}
194
195void QHexView::initialize_byte_iterator(size_t offset)
196{
197 current_chunk_id_ = 0;
198 current_chunk_offset_ = 0;
199 current_offset_ = offset;
200
201 size_t chunks = data_->chunks.size();
202 for (size_t i = 0; i < chunks; i++) {
203 size_t size = data_->chunks[i].data.size();
204
205 if (offset >= size) {
206 current_chunk_id_++;
207 offset -= size;
208 } else {
209 current_chunk_offset_ = offset;
210 break;
211 }
212 }
213
214 if (current_chunk_id_ < data_->chunks.size())
215 current_chunk_ = data_->chunks[current_chunk_id_];
216}
217
218uint8_t QHexView::get_next_byte(bool* is_next_chunk)
219{
220 if (is_next_chunk != nullptr)
221 *is_next_chunk = (current_chunk_offset_ == 0);
222
223 uint8_t v = 0;
224 if (current_chunk_offset_ < current_chunk_.data.size())
225 v = current_chunk_.data[current_chunk_offset_];
226
227 current_offset_++;
228 current_chunk_offset_++;
229
230 if (current_offset_ > data_size_) {
231 qWarning() << "QHexView::get_next_byte() overran binary data boundary:" <<
232 current_offset_ << "of" << data_size_ << "bytes";
233 return 0xEE;
234 }
235
236 if ((current_chunk_offset_ == current_chunk_.data.size()) && (current_offset_ < data_size_)) {
237 current_chunk_id_++;
238 current_chunk_offset_ = 0;
239 current_chunk_ = data_->chunks[current_chunk_id_];
240 }
241
242 return v;
243}
244
245QSize QHexView::getFullSize() const
246{
247 size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_);
248
249 if (verticalScrollBar()->isEnabled())
250 width += GAP_ASCII_SLIDER + verticalScrollBar()->width();
251
252 if (!data_ || (data_size_ == 0))
253 return QSize(width, 0);
254
255 size_t height = data_size_ / BYTES_PER_LINE;
256
257 if (data_size_ % BYTES_PER_LINE)
258 height++;
259
260 height *= charHeight_;
261
262 return QSize(width, height);
263}
264
265void QHexView::paintEvent(QPaintEvent *event)
266{
267 QPainter painter(viewport());
268
269 // Calculate and update the widget and paint area sizes
270 QSize widgetSize = getFullSize();
271 setMinimumWidth(widgetSize.width());
272 setMaximumWidth(widgetSize.width());
273 QSize areaSize = viewport()->size() - QSize(0, charHeight_);
274
275 // Only show scrollbar if the content goes beyond the visible area
276 if (widgetSize.height() > areaSize.height()) {
277 verticalScrollBar()->setEnabled(true);
278 verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
279 verticalScrollBar()->setRange(0, ((widgetSize.height() - areaSize.height())) / charHeight_ + 1);
280 } else
281 verticalScrollBar()->setEnabled(false);
282
283 // Fill widget background
284 painter.fillRect(event->rect(), palette().color(QPalette::Base));
285
286 if (!data_ || (data_size_ == 0)) {
287 painter.setPen(palette().color(QPalette::Text));
288 QString s = tr("No data available");
289 int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
290 int y = areaSize.height() / 2;
291 painter.drawText(x, y, s);
292 return;
293 }
294
295 // Determine first/last line indices
296 size_t firstLineIdx = verticalScrollBar()->value();
297
298 size_t lastLineIdx = firstLineIdx + (areaSize.height() / charHeight_);
299 if (lastLineIdx > (data_size_ / BYTES_PER_LINE)) {
300 lastLineIdx = data_size_ / BYTES_PER_LINE;
301 if (data_size_ % BYTES_PER_LINE)
302 lastLineIdx++;
303 }
304
305 // Fill address area background
306 painter.fillRect(QRect(posAddr_, event->rect().top(),
307 posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));
308
309 // Paint divider line between hex and ASCII areas
310 int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
311 painter.setPen(palette().color(QPalette::Midlight));
312 painter.drawLine(line_x, event->rect().top(), line_x, height());
313
314 // Paint address area
315 painter.setPen(palette().color(QPalette::ButtonText));
316
317 int yStart = 2 * charHeight_;
318 for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
319
320 QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
321 painter.drawText(posAddr_, y, address);
322 y += charHeight_;
323 }
324
325 // Paint top row with hex offsets
326 painter.setPen(palette().color(QPalette::ButtonText));
327 for (int offset = 0; offset <= 0xF; offset++)
328 painter.drawText(posHex_ + (1 + offset * 3) * charWidth_,
329 charHeight_, QString::number(offset, 16).toUpper());
330
331 // Paint hex values
332 QBrush regular = palette().buttonText();
333 QBrush selected = palette().highlight();
334
335 bool multiple_chunks = (data_->chunks.size() > 1);
336 unsigned int chunk_color = 0;
337
338 initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
339 yStart = 2 * charHeight_;
340 for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
341
342 int x = posHex_;
343 for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
344 size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
345
346 // Fetch byte
347 bool is_next_chunk;
348 uint8_t byte_value = get_next_byte(&is_next_chunk);
349
350 if (is_next_chunk) {
351 chunk_color++;
352 if (chunk_color == chunk_colors_.size())
353 chunk_color = 0;
354 }
355
356 if ((pos >= selectBegin_) && (pos < selectEnd_)) {
357 painter.setBackgroundMode(Qt::OpaqueMode);
358 painter.setBackground(selected);
359 painter.setPen(palette().color(QPalette::HighlightedText));
360 } else {
361 painter.setBackground(regular);
362 painter.setBackgroundMode(Qt::TransparentMode);
363 if (!multiple_chunks)
364 painter.setPen(palette().color(QPalette::Text));
365 else
366 painter.setPen(chunk_colors_[chunk_color]);
367 }
368
369 // First nibble
370 QString val = QString::number((byte_value & 0xF0) >> 4, 16).toUpper();
371 painter.drawText(x, y, val);
372
373 // Second nibble
374 val = QString::number((byte_value & 0xF), 16).toUpper();
375 painter.drawText(x + charWidth_, y, val);
376
377 if ((pos >= selectBegin_) && (pos < selectEnd_ - 1) && (i < BYTES_PER_LINE - 1))
378 painter.drawText(x + 2 * charWidth_, y, QString(' '));
379
380 x += 3 * charWidth_;
381 }
382
383 y += charHeight_;
384 }
385
386 // Paint ASCII characters
387 initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
388 yStart = 2 * charHeight_;
389 for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
390
391 int x = posAscii_;
392 for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
393 // Fetch byte
394 uint8_t ch = get_next_byte();
395
396 if ((ch < 0x20) || (ch > 0x7E))
397 ch = '.';
398
399 size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
400 if ((pos >= selectBegin_) && (pos < selectEnd_)) {
401 painter.setBackgroundMode(Qt::OpaqueMode);
402 painter.setBackground(selected);
403 painter.setPen(palette().color(QPalette::HighlightedText));
404 } else {
405 painter.setBackgroundMode(Qt::TransparentMode);
406 painter.setBackground(regular);
407 painter.setPen(palette().color(QPalette::Text));
408 }
409
410 painter.drawText(x, y, QString(ch));
411 x += charWidth_;
412 }
413
414 y += charHeight_;
415 }
416
417 // Paint cursor
418 if (hasFocus()) {
419 int x = (cursorPos_ % (2 * BYTES_PER_LINE));
420 int y = cursorPos_ / (2 * BYTES_PER_LINE);
421 y -= firstLineIdx;
422 int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
423 int cursorY = charHeight_ + y * charHeight_ + 4;
424 painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
425 }
426}
427
428void QHexView::keyPressEvent(QKeyEvent *event)
429{
430 bool setVisible = false;
431
432 // Cursor movements
433 if (event->matches(QKeySequence::MoveToNextChar)) {
434 setCursorPos(cursorPos_ + 1);
435 resetSelection(cursorPos_);
436 setVisible = true;
437 }
438 if (event->matches(QKeySequence::MoveToPreviousChar)) {
439 setCursorPos(cursorPos_ - 1);
440 resetSelection(cursorPos_);
441 setVisible = true;
442 }
443
444 if (event->matches(QKeySequence::MoveToEndOfLine)) {
445 setCursorPos(cursorPos_ | ((BYTES_PER_LINE * 2) - 1));
446 resetSelection(cursorPos_);
447 setVisible = true;
448 }
449 if (event->matches(QKeySequence::MoveToStartOfLine)) {
450 setCursorPos(cursorPos_ | (cursorPos_ % (BYTES_PER_LINE * 2)));
451 resetSelection(cursorPos_);
452 setVisible = true;
453 }
454 if (event->matches(QKeySequence::MoveToPreviousLine)) {
455 setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
456 resetSelection(cursorPos_);
457 setVisible = true;
458 }
459 if (event->matches(QKeySequence::MoveToNextLine)) {
460 setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
461 resetSelection(cursorPos_);
462 setVisible = true;
463 }
464
465 if (event->matches(QKeySequence::MoveToNextPage)) {
466 setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
467 resetSelection(cursorPos_);
468 setVisible = true;
469 }
470 if (event->matches(QKeySequence::MoveToPreviousPage)) {
471 setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
472 resetSelection(cursorPos_);
473 setVisible = true;
474 }
475 if (event->matches(QKeySequence::MoveToEndOfDocument)) {
476 setCursorPos(data_size_ * 2);
477 resetSelection(cursorPos_);
478 setVisible = true;
479 }
480 if (event->matches(QKeySequence::MoveToStartOfDocument)) {
481 setCursorPos(0);
482 resetSelection(cursorPos_);
483 setVisible = true;
484 }
485
486 // Select commands
487 if (event->matches(QKeySequence::SelectAll)) {
488 resetSelection(0);
489 setSelection(2 * data_size_);
490 setVisible = true;
491 }
492 if (event->matches(QKeySequence::SelectNextChar)) {
493 int pos = cursorPos_ + 1;
494 setCursorPos(pos);
495 setSelection(pos);
496 setVisible = true;
497 }
498 if (event->matches(QKeySequence::SelectPreviousChar)) {
499 int pos = cursorPos_ - 1;
500 setSelection(pos);
501 setCursorPos(pos);
502 setVisible = true;
503 }
504 if (event->matches(QKeySequence::SelectEndOfLine)) {
505 int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
506 setCursorPos(pos);
507 setSelection(pos);
508 setVisible = true;
509 }
510 if (event->matches(QKeySequence::SelectStartOfLine)) {
511 int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
512 setCursorPos(pos);
513 setSelection(pos);
514 setVisible = true;
515 }
516 if (event->matches(QKeySequence::SelectPreviousLine)) {
517 int pos = cursorPos_ - (2 * BYTES_PER_LINE);
518 setCursorPos(pos);
519 setSelection(pos);
520 setVisible = true;
521 }
522 if (event->matches(QKeySequence::SelectNextLine)) {
523 int pos = cursorPos_ + (2 * BYTES_PER_LINE);
524 setCursorPos(pos);
525 setSelection(pos);
526 setVisible = true;
527 }
528
529 if (event->matches(QKeySequence::SelectNextPage)) {
530 int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
531 setCursorPos(pos);
532 setSelection(pos);
533 setVisible = true;
534 }
535 if (event->matches(QKeySequence::SelectPreviousPage)) {
536 int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
537 setCursorPos(pos);
538 setSelection(pos);
539 setVisible = true;
540 }
541 if (event->matches(QKeySequence::SelectEndOfDocument)) {
542 int pos = data_size_ * 2;
543 setCursorPos(pos);
544 setSelection(pos);
545 setVisible = true;
546 }
547 if (event->matches(QKeySequence::SelectStartOfDocument)) {
548 setCursorPos(0);
549 setSelection(0);
550 setVisible = true;
551 }
552
553 if (event->matches(QKeySequence::Copy) && (data_)) {
554 QString text;
555
556 initialize_byte_iterator(selectBegin_ / 2);
557
558 size_t selectedSize = (selectEnd_ - selectBegin_ + 1) / 2;
559 for (size_t i = 0; i < selectedSize; i++) {
560 uint8_t byte_value = get_next_byte();
561
562 QString s = QString::number((byte_value & 0xF0) >> 4, 16).toUpper() +
563 QString::number((byte_value & 0xF), 16).toUpper() + " ";
564 text += s;
565
566 if (i % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
567 text += "\n";
568 }
569
570 QClipboard *clipboard = QApplication::clipboard();
571 clipboard->setText(text, QClipboard::Clipboard);
572 if (clipboard->supportsSelection())
573 clipboard->setText(text, QClipboard::Selection);
574 }
575
576 if (setVisible)
577 ensureVisible();
578
579 viewport()->update();
580}
581
582void QHexView::mouseMoveEvent(QMouseEvent *event)
583{
584 int actPos = cursorPosFromMousePos(event->pos());
585 setCursorPos(actPos);
586 setSelection(actPos);
587
588 viewport()->update();
589}
590
591void QHexView::mousePressEvent(QMouseEvent *event)
592{
593 int cPos = cursorPosFromMousePos(event->pos());
594
595 if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
596 setSelection(cPos);
597 else
598 resetSelection(cPos);
599
600 setCursorPos(cPos);
601
602 viewport()->update();
603}
604
605size_t QHexView::cursorPosFromMousePos(const QPoint &position)
606{
607 size_t pos = -1;
608
609 if (((size_t)position.x() >= posHex_) &&
610 ((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {
611
612 // Note: We add 1.5 character widths so that selection across
613 // byte gaps is smoother
614 size_t x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;
615
616 // Note: We allow only full bytes to be selected, not nibbles,
617 // so we round to the nearest byte gap
618 x = (2 * x + 1) / 3;
619
620 size_t firstLineIdx = verticalScrollBar()->value();
621 size_t y = ((position.y() / charHeight_) - 1) * 2 * BYTES_PER_LINE;
622 pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
623 }
624
625 size_t max_pos = data_size_ * 2;
626
627 return std::min(pos, max_pos);
628}
629
630void QHexView::resetSelection()
631{
632 selectBegin_ = selectInit_;
633 selectEnd_ = selectInit_;
634}
635
636void QHexView::resetSelection(int pos)
637{
638 if (pos < 0)
639 pos = 0;
640
641 selectInit_ = pos;
642 selectBegin_ = pos;
643 selectEnd_ = pos;
644}
645
646void QHexView::setSelection(int pos)
647{
648 if (pos < 0)
649 pos = 0;
650
651 if ((size_t)pos >= selectInit_) {
652 selectEnd_ = pos;
653 selectBegin_ = selectInit_;
654 } else {
655 selectBegin_ = pos;
656 selectEnd_ = selectInit_;
657 }
658}
659
660void QHexView::setCursorPos(int position)
661{
662 if (position < 0)
663 position = 0;
664
665 int max_pos = data_size_ * 2;
666
667 if (position > max_pos)
668 position = max_pos;
669
670 cursorPos_ = position;
671}
672
673void QHexView::ensureVisible()
674{
675 QSize areaSize = viewport()->size();
676
677 int firstLineIdx = verticalScrollBar()->value();
678 int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
679
680 int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
681
682 if (cursorY < firstLineIdx)
683 verticalScrollBar()->setValue(cursorY);
684 else
685 if(cursorY >= lastLineIdx)
686 verticalScrollBar()->setValue(cursorY - areaSize.height() / charHeight_ + 1);
687}