[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 <QDebug>
#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;

	size_t size = 0;
	size_t chunks = data_->chunks.size();
	for (size_t i = 0; i < chunks; i++)
		size += data_->chunks[i].data.size();
	data_size_ = 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;

	size_t chunks = data_->chunks.size();
	for (size_t i = 0; i < chunks; i++) {
		size_t size = data_->chunks[i].data.size();

		if (offset >= size) {
			current_chunk_id_++;
			offset -= size;
		} else {
			current_chunk_offset_ = offset;
			break;
		}
	}

	if (current_chunk_id_ < data_->chunks.size())
		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 = 0;
	if (current_chunk_offset_ < current_chunk_.data.size())
		v = current_chunk_.data[current_chunk_offset_];

	current_offset_++;
	current_chunk_offset_++;

	if (current_offset_ > data_size_) {
		qWarning() << "QHexView::get_next_byte() overran binary data boundary:" <<
			current_offset_ << "of" << data_size_ << "bytes";
		return 0xEE;
	}

	if ((current_chunk_offset_ == current_chunk_.data.size()) && (current_offset_ < 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 <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
	42	const unsigned int BYTES_PER_LINE = 16;
	43	const unsigned int HEXCHARS_IN_LINE = BYTES_PER_LINE * 3 - 1;
	44	const unsigned int GAP_ADR_HEX = 10;
	45	const unsigned int GAP_HEX_ASCII = 10;
	46	const unsigned int GAP_ASCII_SLIDER = 5;
	47
	48
	49	QHexView::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
	82	void QHexView::setMode(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
	90	void QHexView::setData(const DecodeBinaryClass* data)
	91	{
	92	data_ = data;
	93
	94	size_t size = 0;
	95	size_t chunks = data_->chunks.size();
	96	for (size_t i = 0; i < chunks; i++)
	97	size += data_->chunks[i].data.size();
	98	data_size_ = size;
	99
	100	viewport()->update();
	101	}
	102
	103	void QHexView::clear()
	104	{
	105	verticalScrollBar()->setValue(0);
	106	data_ = nullptr;
	107	data_size_ = 0;
	108
	109	viewport()->update();
	110	}
	111
	112	void QHexView::showFromOffset(size_t offset)
	113	{
	114	if (data_ && (offset < data_size_)) {
	115	setCursorPos(offset * 2);
	116
	117	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	118	verticalScrollBar() -> setValue(cursorY);
	119	}
	120
	121	viewport()->update();
	122	}
	123
	124	void QHexView::initialize_byte_iterator(size_t offset)
	125	{
	126	current_chunk_id_ = 0;
	127	current_chunk_offset_ = 0;
	128	current_offset_ = offset;
	129
	130	size_t chunks = data_->chunks.size();
	131	for (size_t i = 0; i < chunks; i++) {
	132	size_t size = data_->chunks[i].data.size();
	133
	134	if (offset >= size) {
	135	current_chunk_id_++;
	136	offset -= size;
	137	} else {
	138	current_chunk_offset_ = offset;
	139	break;
	140	}
	141	}
	142
	143	if (current_chunk_id_ < data_->chunks.size())
	144	current_chunk_ = data_->chunks[current_chunk_id_];
	145	}
	146
	147	uint8_t QHexView::get_next_byte(bool* is_next_chunk)
	148	{
	149	if (is_next_chunk != nullptr)
	150	*is_next_chunk = (current_chunk_offset_ == 0);
	151
	152	uint8_t v = 0;
	153	if (current_chunk_offset_ < current_chunk_.data.size())
	154	v = current_chunk_.data[current_chunk_offset_];
	155
	156	current_offset_++;
	157	current_chunk_offset_++;
	158
	159	if (current_offset_ > data_size_) {
	160	qWarning() << "QHexView::get_next_byte() overran binary data boundary:" <<
	161	current_offset_ << "of" << data_size_ << "bytes";
	162	return 0xEE;
	163	}
	164
	165	if ((current_chunk_offset_ == current_chunk_.data.size()) && (current_offset_ < data_size_)) {
	166	current_chunk_id_++;
	167	current_chunk_offset_ = 0;
	168	current_chunk_ = data_->chunks[current_chunk_id_];
	169	}
	170
	171	return v;
	172	}
	173
	174	QSize QHexView::getFullSize() const
	175	{
	176	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
	177	GAP_ASCII_SLIDER + verticalScrollBar()->width();
	178
	179	if (!data_)
	180	return QSize(width, 0);
	181
	182	size_t height = data_size_ / BYTES_PER_LINE;
	183
	184	if (data_size_ % BYTES_PER_LINE)
	185	height++;
	186
	187	height *= charHeight_;
	188
	189	return QSize(width, height);
	190	}
	191
	192	void QHexView::paintEvent(QPaintEvent *event)
	193	{
	194	QPainter painter(viewport());
	195
	196	// Calculate and update the widget and paint area sizes
	197	QSize widgetSize = getFullSize();
	198	setMinimumWidth(widgetSize.width());
	199	setMaximumWidth(widgetSize.width());
	200	QSize areaSize = viewport()->size();
	201
	202	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	203	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);
	204
	205	// Fill widget background
	206	painter.fillRect(event->rect(), palette().color(QPalette::Base));
	207
	208	if (!data_ \|\| (data_size_ == 0)) {
	209	painter.setPen(palette().color(QPalette::Text));
	210	QString s = tr("No data available");
	211	int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
	212	int y = areaSize.height() / 2;
	213	painter.drawText(x, y, s);
	214	return;
	215	}
	216
	217	// Determine first/last line indices
	218	size_t firstLineIdx = verticalScrollBar()->value();
	219
	220	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	221	if (lastLineIdx > (data_size_ / BYTES_PER_LINE)) {
	222	lastLineIdx = data_size_ / BYTES_PER_LINE;
	223	if (data_size_ % BYTES_PER_LINE)
	224	lastLineIdx++;
	225	}
	226
	227	// Fill address area background
	228	painter.fillRect(QRect(posAddr_, event->rect().top(),
	229	posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));
	230
	231	// Paint divider line between hex and ASCII areas
	232	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	233	painter.setPen(palette().color(QPalette::Midlight));
	234	painter.drawLine(line_x, event->rect().top(), line_x, height());
	235
	236	// Paint address area
	237	painter.setPen(palette().color(QPalette::ButtonText));
	238
	239	int yStart = charHeight_;
	240	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	241
	242	QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
	243	painter.drawText(posAddr_, y, address);
	244	y += charHeight_;
	245	}
	246
	247	// Paint hex values
	248	QBrush regular = palette().buttonText();
	249	QBrush selected = palette().highlight();
	250
	251	bool multiple_chunks = (data_->chunks.size() > 1);
	252	unsigned int chunk_color = 0;
	253
	254	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
	255	yStart = charHeight_;
	256	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	257
	258	int x = posHex_;
	259	for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
	260	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
	261
	262	// Fetch byte
	263	bool is_next_chunk;
	264	uint8_t byte_value = get_next_byte(&is_next_chunk);
	265
	266	if (is_next_chunk) {
	267	chunk_color++;
	268	if (chunk_color == chunk_colors_.size())
	269	chunk_color = 0;
	270	}
	271
	272	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
	273	painter.setBackgroundMode(Qt::OpaqueMode);
	274	painter.setBackground(selected);
	275	painter.setPen(palette().color(QPalette::HighlightedText));
	276	} else {
	277	painter.setBackground(regular);
	278	painter.setBackgroundMode(Qt::TransparentMode);
	279	if (!multiple_chunks)
	280	painter.setPen(palette().color(QPalette::Text));
	281	else
	282	painter.setPen(chunk_colors_[chunk_color]);
	283	}
	284
	285	// First nibble
	286	QString val = QString::number((byte_value & 0xF0) >> 4, 16).toUpper();
	287	painter.drawText(x, y, val);
	288
	289	// Second nibble
	290	val = QString::number((byte_value & 0xF), 16).toUpper();
	291	painter.drawText(x + charWidth_, y, val);
	292
	293	x += 3 * charWidth_;
	294	}
	295
	296	y += charHeight_;
	297	}
	298
	299	// Paint ASCII characters
	300	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
	301	yStart = charHeight_;
	302	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	303
	304	int x = posAscii_;
	305	for (size_t i = 0; (i < BYTES_PER_LINE) && (current_offset_ < data_size_); i++) {
	306	// Fetch byte
	307	uint8_t ch = get_next_byte();
	308
	309	if ((ch < 0x20) \|\| (ch > 0x7E))
	310	ch = '.';
	311
	312	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
	313	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
	314	painter.setBackgroundMode(Qt::OpaqueMode);
	315	painter.setBackground(selected);
	316	painter.setPen(palette().color(QPalette::HighlightedText));
	317	} else {
	318	painter.setBackgroundMode(Qt::TransparentMode);
	319	painter.setBackground(regular);
	320	painter.setPen(palette().color(QPalette::Text));
	321	}
	322
	323	painter.drawText(x, y, QString(ch));
	324	x += charWidth_;
	325	}
	326
	327	y += charHeight_;
	328	}
	329
	330	// Paint cursor
	331	if (hasFocus()) {
	332	int x = (cursorPos_ % (2 * BYTES_PER_LINE));
	333	int y = cursorPos_ / (2 * BYTES_PER_LINE);
	334	y -= firstLineIdx;
	335	int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
	336	int cursorY = y * charHeight_ + 4;
	337	painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
	338	}
	339	}
	340
	341	void QHexView::keyPressEvent(QKeyEvent *event)
	342	{
	343	bool setVisible = false;
	344
	345	// Cursor movements
	346	if (event->matches(QKeySequence::MoveToNextChar)) {
	347	setCursorPos(cursorPos_ + 1);
	348	resetSelection(cursorPos_);
	349	setVisible = true;
	350	}
	351	if (event->matches(QKeySequence::MoveToPreviousChar)) {
	352	setCursorPos(cursorPos_ - 1);
	353	resetSelection(cursorPos_);
	354	setVisible = true;
	355	}
	356
	357	if (event->matches(QKeySequence::MoveToEndOfLine)) {
	358	setCursorPos(cursorPos_ \| ((BYTES_PER_LINE * 2) - 1));
	359	resetSelection(cursorPos_);
	360	setVisible = true;
	361	}
	362	if (event->matches(QKeySequence::MoveToStartOfLine)) {
	363	setCursorPos(cursorPos_ \| (cursorPos_ % (BYTES_PER_LINE * 2)));
	364	resetSelection(cursorPos_);
	365	setVisible = true;
	366	}
	367	if (event->matches(QKeySequence::MoveToPreviousLine)) {
	368	setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
	369	resetSelection(cursorPos_);
	370	setVisible = true;
	371	}
	372	if (event->matches(QKeySequence::MoveToNextLine)) {
	373	setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
	374	resetSelection(cursorPos_);
	375	setVisible = true;
	376	}
	377
	378	if (event->matches(QKeySequence::MoveToNextPage)) {
	379	setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	380	resetSelection(cursorPos_);
	381	setVisible = true;
	382	}
	383	if (event->matches(QKeySequence::MoveToPreviousPage)) {
	384	setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	385	resetSelection(cursorPos_);
	386	setVisible = true;
	387	}
	388	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
	389	setCursorPos(data_size_ * 2);
	390	resetSelection(cursorPos_);
	391	setVisible = true;
	392	}
	393	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
	394	setCursorPos(0);
	395	resetSelection(cursorPos_);
	396	setVisible = true;
	397	}
	398
	399	// Select commands
	400	if (event->matches(QKeySequence::SelectAll)) {
	401	resetSelection(0);
	402	setSelection(2 * data_size_);
	403	setVisible = true;
	404	}
	405	if (event->matches(QKeySequence::SelectNextChar)) {
	406	int pos = cursorPos_ + 1;
	407	setCursorPos(pos);
	408	setSelection(pos);
	409	setVisible = true;
	410	}
	411	if (event->matches(QKeySequence::SelectPreviousChar)) {
	412	int pos = cursorPos_ - 1;
	413	setSelection(pos);
	414	setCursorPos(pos);
	415	setVisible = true;
	416	}
	417	if (event->matches(QKeySequence::SelectEndOfLine)) {
	418	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
	419	setCursorPos(pos);
	420	setSelection(pos);
	421	setVisible = true;
	422	}
	423	if (event->matches(QKeySequence::SelectStartOfLine)) {
	424	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
	425	setCursorPos(pos);
	426	setSelection(pos);
	427	setVisible = true;
	428	}
	429	if (event->matches(QKeySequence::SelectPreviousLine)) {
	430	int pos = cursorPos_ - (2 * BYTES_PER_LINE);
	431	setCursorPos(pos);
	432	setSelection(pos);
	433	setVisible = true;
	434	}
	435	if (event->matches(QKeySequence::SelectNextLine)) {
	436	int pos = cursorPos_ + (2 * BYTES_PER_LINE);
	437	setCursorPos(pos);
	438	setSelection(pos);
	439	setVisible = true;
	440	}
	441
	442	if (event->matches(QKeySequence::SelectNextPage)) {
	443	int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	444	setCursorPos(pos);
	445	setSelection(pos);
	446	setVisible = true;
	447	}
	448	if (event->matches(QKeySequence::SelectPreviousPage)) {
	449	int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	450	setCursorPos(pos);
	451	setSelection(pos);
	452	setVisible = true;
	453	}
	454	if (event->matches(QKeySequence::SelectEndOfDocument)) {
	455	int pos = data_size_ * 2;
	456	setCursorPos(pos);
	457	setSelection(pos);
	458	setVisible = true;
	459	}
	460	if (event->matches(QKeySequence::SelectStartOfDocument)) {
	461	setCursorPos(0);
	462	setSelection(0);
	463	setVisible = true;
	464	}
	465
	466	if (event->matches(QKeySequence::Copy) && (data_)) {
	467	QString text;
	468
	469	initialize_byte_iterator(selectBegin_ / 2);
	470
	471	size_t selectedSize = (selectEnd_ - selectBegin_ + 1) / 2;
	472	for (size_t i = 0; i < selectedSize; i++) {
	473	uint8_t byte_value = get_next_byte();
	474
	475	QString s = QString::number((byte_value & 0xF0) >> 4, 16).toUpper() +
	476	QString::number((byte_value & 0xF), 16).toUpper() + " ";
	477	text += s;
	478
	479	if (i % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
	480	text += "\n";
	481	}
	482
	483	QClipboard *clipboard = QApplication::clipboard();
	484	clipboard->setText(text, QClipboard::Clipboard);
	485	if (clipboard->supportsSelection())
	486	clipboard->setText(text, QClipboard::Selection);
	487	}
	488
	489	if (setVisible)
	490	ensureVisible();
	491
	492	viewport()->update();
	493	}
	494
	495	void QHexView::mouseMoveEvent(QMouseEvent *event)
	496	{
	497	int actPos = cursorPosFromMousePos(event->pos());
	498	setCursorPos(actPos);
	499	setSelection(actPos);
	500
	501	viewport()->update();
	502	}
	503
	504	void QHexView::mousePressEvent(QMouseEvent *event)
	505	{
	506	int cPos = cursorPosFromMousePos(event->pos());
	507
	508	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
	509	setSelection(cPos);
	510	else
	511	resetSelection(cPos);
	512
	513	setCursorPos(cPos);
	514
	515	viewport()->update();
	516	}
	517
	518	size_t QHexView::cursorPosFromMousePos(const QPoint &position)
	519	{
	520	size_t pos = -1;
	521
	522	if (((size_t)position.x() >= posHex_) &&
	523	((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {
	524
	525	// Note: We add 1.5 character widths so that selection across
	526	// byte gaps is smoother
	527	size_t x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;
	528
	529	// Note: We allow only full bytes to be selected, not nibbles,
	530	// so we round to the nearest byte gap
	531	x = (2 * x + 1) / 3;
	532
	533	size_t firstLineIdx = verticalScrollBar()->value();
	534	size_t y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
	535	pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	536	}
	537
	538	size_t max_pos = data_size_ * 2;
	539
	540	return std::min(pos, max_pos);
	541	}
	542
	543	void QHexView::resetSelection()
	544	{
	545	selectBegin_ = selectInit_;
	546	selectEnd_ = selectInit_;
	547	}
	548
	549	void QHexView::resetSelection(int pos)
	550	{
	551	if (pos < 0)
	552	pos = 0;
	553
	554	selectInit_ = pos;
	555	selectBegin_ = pos;
	556	selectEnd_ = pos;
	557	}
	558
	559	void QHexView::setSelection(int pos)
	560	{
	561	if (pos < 0)
	562	pos = 0;
	563
	564	if ((size_t)pos >= selectInit_) {
	565	selectEnd_ = pos;
	566	selectBegin_ = selectInit_;
	567	} else {
	568	selectBegin_ = pos;
	569	selectEnd_ = selectInit_;
	570	}
	571	}
	572
	573	void QHexView::setCursorPos(int position)
	574	{
	575	if (position < 0)
	576	position = 0;
	577
	578	int max_pos = data_size_ * 2;
	579
	580	if (position > max_pos)
	581	position = max_pos;
	582
	583	cursorPos_ = position;
	584	}
	585
	586	void QHexView::ensureVisible()
	587	{
	588	QSize areaSize = viewport()->size();
	589
	590	int firstLineIdx = verticalScrollBar()->value();
	591	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	592
	593	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	594
	595	if (cursorY < firstLineIdx)
	596	verticalScrollBar()->setValue(cursorY);
	597	else
	598	if(cursorY >= lastLineIdx)
	599	verticalScrollBar()->setValue(cursorY - areaSize.height() / charHeight_ + 1);
	600	}