[pulseview.git] / pv / views / decoder_output / QHexView.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2015 Victor Anjin <virinext@gmail.com>
 * Copyright (C) 2019 Soeren Apel <soeren@apelpie.net>
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <QApplication>
#include <QClipboard>
#include <QFont>
#include <QKeyEvent>
#include <QScrollBar>
#include <QSize>
#include <QPainter>
#include <QPaintEvent>

#include "QHexView.hpp"

const unsigned int BYTES_PER_LINE   = 16;
const unsigned int HEXCHARS_IN_LINE = BYTES_PER_LINE * 3 - 1;
const unsigned int GAP_ADR_HEX      = 10;
const unsigned int GAP_HEX_ASCII    = 10;
const unsigned int GAP_ASCII_SLIDER = 5;


QHexView::QHexView(QWidget *parent):
	QAbstractScrollArea(parent),
	mode_(ChunkedDataMode),
	data_(nullptr),
	selectBegin_(0),
	selectEnd_(0),
	cursorPos_(0)
{
	setFont(QFont("Courier", 10));

	charWidth_ = fontMetrics().boundingRect('X').width();
	charHeight_ = fontMetrics().height();

	// Determine X coordinates of the three sub-areas
	posAddr_  = 0;
	posHex_   = 10 * charWidth_ + GAP_ADR_HEX;
	posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;

	setFocusPolicy(Qt::StrongFocus);

	if (palette().color(QPalette::ButtonText).toHsv().value() > 127) {
		// Color is bright
		chunk_colors_.emplace_back(100, 149, 237); // QColorConstants::Svg::cornflowerblue
		chunk_colors_.emplace_back(60, 179, 113);  // QColorConstants::Svg::mediumseagreen
		chunk_colors_.emplace_back(210, 180, 140); // QColorConstants::Svg::tan
	} else {
		// Color is dark
		chunk_colors_.emplace_back(0, 0, 139);   // QColorConstants::Svg::darkblue
		chunk_colors_.emplace_back(34, 139, 34); // QColorConstants::Svg::forestgreen
		chunk_colors_.emplace_back(160, 82, 45); // QColorConstants::Svg::sienna
	}
}

void QHexView::setMode(Mode m)
{
	mode_ = m;

	// This is not expected to be set when data is showing,
	// so we don't update the viewport here
}

void QHexView::setData(const DecodeBinaryClass* data)
{
	data_ = data;

	data_size_ = 0;
	for (const DecodeBinaryDataChunk& chunk : data_->chunks)
		data_size_ += chunk.data.size();

	viewport()->update();
}

void QHexView::clear()
{
	verticalScrollBar()->setValue(0);
	data_ = nullptr;
	data_size_ = 0;

	viewport()->update();
}

void QHexView::showFromOffset(size_t offset)
{
	if (data_ && (offset < data_size_)) {
		setCursorPos(offset * 2);

		int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
		verticalScrollBar() -> setValue(cursorY);
	}

	viewport()->update();
}

void QHexView::initialize_byte_iterator(size_t offset)
{
	current_chunk_id_ = 0;
	current_chunk_offset_ = 0;
	current_offset_ = offset;

	for (const DecodeBinaryDataChunk& chunk : data_->chunks)
		if (offset >= chunk.data.size()) {
			current_chunk_id_++;
			offset -= chunk.data.size();
		} else {
			current_chunk_offset_ = offset;
			break;
		}

	current_chunk_ = data_->chunks[current_chunk_id_];
}

uint8_t QHexView::get_next_byte(bool* is_next_chunk)
{
	if (is_next_chunk != nullptr)
		*is_next_chunk = (current_chunk_offset_ == 0);

	uint8_t v = current_chunk_.data[current_chunk_offset_];

	current_offset_++;
	current_chunk_offset_++;

	if (current_chunk_offset_ == current_chunk_.data.size()) {
		current_chunk_id_++;
		current_chunk_offset_ = 0;
		current_chunk_ = data_->chunks[current_chunk_id_];
	}

	return v;
}

QSize QHexView::getFullSize() const
{
	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
		GAP_ASCII_SLIDER + verticalScrollBar()->width();

	if (!data_)
		return QSize(width, 0);

	size_t height = data_size_ / BYTES_PER_LINE;

	if (data_size_ % BYTES_PER_LINE)
		height++;

	height *= charHeight_;

	return QSize(width, height);
}

void QHexView::paintEvent(QPaintEvent *event)
{
	QPainter painter(viewport());

	// Calculate and update the widget and paint area sizes
	QSize widgetSize = getFullSize();
	setMinimumWidth(widgetSize.width());
	setMaximumWidth(widgetSize.width());
	QSize areaSize = viewport()->size();

	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);

	// Fill widget background
	painter.fillRect(event->rect(), palette().color(QPalette::Base));

	if (!data_ || (data_size_ == 0)) {
		painter.setPen(palette().color(QPalette::Text));
		QString s = tr("No data available");
		int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
		int y = areaSize.height() / 2;
		painter.drawText(x, y, s);
		return;
	}

	// Determine first/last line indices
	size_t firstLineIdx = verticalScrollBar()->value();

	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	if (lastLineIdx > (data_size_ / BYTES_PER_LINE)) {
		lastLineIdx = data_size_ / BYTES_PER_LINE;
		if (data_size_ % BYTES_PER_LINE)
			lastLineIdx++;
	}

	// Fill address area background
	painter.fillRect(QRect(posAddr_, event->rect().top(),
		posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));

	// Paint divider line between hex and ASCII areas
	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	painter.setPen(palette().color(QPalette::Midlight));
	painter.drawLine(line_x, event->rect().top(), line_x, height());

	// Paint address area
	painter.setPen(palette().color(QPalette::ButtonText));

	int yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
		painter.drawText(posAddr_, y, address);
		y += charHeight_;
	}

	// Paint hex values
	QBrush regular = palette().buttonText();
	QBrush selected = palette().highlight();

	bool multiple_chunks = (data_->chunks.size() > 1);
	unsigned int chunk_color = 0;

	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
	yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		int x = posHex_;
		for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
			size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;

			// Fetch byte
			bool is_next_chunk;
			uint8_t byte_value = get_next_byte(&is_next_chunk);

			if (is_next_chunk) {
				chunk_color++;
				if (chunk_color == chunk_colors_.size())
					chunk_color = 0;
			}

			if ((pos >= selectBegin_) && (pos < selectEnd_)) {
				painter.setBackgroundMode(Qt::OpaqueMode);
				painter.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				painter.setBackground(regular);
				painter.setBackgroundMode(Qt::TransparentMode);
				if (!multiple_chunks)
					painter.setPen(palette().color(QPalette::Text));
				else
					painter.setPen(chunk_colors_[chunk_color]);
			}

			// First nibble
			QString val = QString::number((byte_value & 0xF0) >> 4, 16).toUpper();
			painter.drawText(x, y, val);

			// Second nibble
			val = QString::number((byte_value & 0xF), 16).toUpper();
			painter.drawText(x + charWidth_, y, val);

			x += 3 * charWidth_;
		}

		y += charHeight_;
	}

	// Paint ASCII characters
	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
	yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		int x = posAscii_;
		for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
			// Fetch byte
			uint8_t ch = get_next_byte();

			if ((ch < 0x20) || (ch > 0x7E))
				ch = '.';

			size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
			if ((pos >= selectBegin_) && (pos < selectEnd_)) {
				painter.setBackgroundMode(Qt::OpaqueMode);
				painter.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				painter.setBackgroundMode(Qt::TransparentMode);
				painter.setBackground(regular);
				painter.setPen(palette().color(QPalette::Text));
			}

			painter.drawText(x, y, QString(ch));
			x += charWidth_;
		}

		y += charHeight_;
	}

	// Paint cursor
	if (hasFocus()) {
		int x = (cursorPos_ % (2 * BYTES_PER_LINE));
		int y = cursorPos_ / (2 * BYTES_PER_LINE);
		y -= firstLineIdx;
		int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
		int cursorY = y * charHeight_ + 4;
		painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
	}
}

void QHexView::keyPressEvent(QKeyEvent *event)
{
	bool setVisible = false;

	// Cursor movements
	if (event->matches(QKeySequence::MoveToNextChar)) {
		setCursorPos(cursorPos_ + 1);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousChar)) {
		setCursorPos(cursorPos_ - 1);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	if (event->matches(QKeySequence::MoveToEndOfLine)) {
		setCursorPos(cursorPos_ | ((BYTES_PER_LINE * 2) - 1));
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToStartOfLine)) {
		setCursorPos(cursorPos_ | (cursorPos_ % (BYTES_PER_LINE * 2)));
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousLine)) {
		setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToNextLine)) {
		setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	if (event->matches(QKeySequence::MoveToNextPage)) {
		setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousPage)) {
		setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
		setCursorPos(data_size_ * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
		setCursorPos(0);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	// Select commands
	if (event->matches(QKeySequence::SelectAll)) {
		resetSelection(0);
		setSelection(2 * data_size_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectNextChar)) {
		int pos = cursorPos_ + 1;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousChar)) {
		int pos = cursorPos_ - 1;
		setSelection(pos);
		setCursorPos(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectEndOfLine)) {
		int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectStartOfLine)) {
		int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousLine)) {
		int pos = cursorPos_ - (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectNextLine)) {
		int pos = cursorPos_ + (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}

	if (event->matches(QKeySequence::SelectNextPage)) {
		int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousPage)) {
		int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectEndOfDocument)) {
		int pos = data_size_ * 2;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectStartOfDocument)) {
		setCursorPos(0);
		setSelection(0);
		setVisible = true;
	}

	if (event->matches(QKeySequence::Copy) && (data_)) {
		QString text;

		initialize_byte_iterator(selectBegin_ / 2);

		size_t selectedSize = (selectEnd_ - selectBegin_ + 1) / 2;
		for (size_t i = 0; i < selectedSize; i++) {
			uint8_t byte_value = get_next_byte();

			QString s = QString::number((byte_value & 0xF0) >> 4, 16).toUpper() +
				QString::number((byte_value & 0xF), 16).toUpper() + " ";
			text += s;

			if (i % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
				text += "\n";
		}

		QClipboard *clipboard = QApplication::clipboard();
		clipboard->setText(text, QClipboard::Clipboard);
		if (clipboard->supportsSelection())
			clipboard->setText(text, QClipboard::Selection);
	}

	if (setVisible)
		ensureVisible();

	viewport()->update();
}

void QHexView::mouseMoveEvent(QMouseEvent *event)
{
	int actPos = cursorPosFromMousePos(event->pos());
	setCursorPos(actPos);
	setSelection(actPos);

	viewport()->update();
}

void QHexView::mousePressEvent(QMouseEvent *event)
{
	int cPos = cursorPosFromMousePos(event->pos());

	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
		setSelection(cPos);
	else
		resetSelection(cPos);

	setCursorPos(cPos);

	viewport()->update();
}

size_t QHexView::cursorPosFromMousePos(const QPoint &position)
{
	size_t pos = -1;

	if (((size_t)position.x() >= posHex_) &&
		((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {

		// Note: We add 1.5 character widths so that selection across
		// byte gaps is smoother
		size_t x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;

		// Note: We allow only full bytes to be selected, not nibbles,
		// so we round to the nearest byte gap
		x = (2 * x + 1) / 3;

		size_t firstLineIdx = verticalScrollBar()->value();
		size_t y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
		pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	}

	size_t max_pos = data_size_ * 2;

	return std::min(pos, max_pos);
}

void QHexView::resetSelection()
{
	selectBegin_ = selectInit_;
	selectEnd_ = selectInit_;
}

void QHexView::resetSelection(int pos)
{
	if (pos < 0)
		pos = 0;

	selectInit_ = pos;
	selectBegin_ = pos;
	selectEnd_ = pos;
}

void QHexView::setSelection(int pos)
{
	if (pos < 0)
		pos = 0;

	if ((size_t)pos >= selectInit_) {
		selectEnd_ = pos;
		selectBegin_ = selectInit_;
	} else {
		selectBegin_ = pos;
		selectEnd_ = selectInit_;
	}
}

void QHexView::setCursorPos(int position)
{
	if (position < 0)
		position = 0;

	int max_pos = data_size_ * 2;

	if (position > max_pos)
		position = max_pos;

	cursorPos_ = position;
}

void QHexView::ensureVisible()
{
	QSize areaSize = viewport()->size();

	int firstLineIdx = verticalScrollBar()->value();
	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;

	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);

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