[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);
}

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;

	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_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 = painter.brush();
	QBrush selected = QBrush(palette().color(QPalette::Highlight));

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

		painter.setBackgroundMode(Qt::OpaqueMode);

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

			if ((pos >= selectBegin_) && (pos < selectEnd_)) {
				painter.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				painter.setBackground(regular);
				painter.setPen(palette().color(QPalette::Text));
			}

			// Fetch byte
			uint8_t byte_value = get_next_byte();

			// 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; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < data_size_ && (i < BYTES_PER_LINE); 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.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				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
c7b76823 SA	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
560f8377 SA	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;
c7b76823	46
c7b76823 SA	47
c7b76823 SA	48	QHexView::QHexView(QWidget *parent):
560f8377	49	QAbstractScrollArea(parent),
628b45cc SA	50	mode_(ChunkedDataMode),
	51	data_(nullptr),
	52	selectBegin_(0),
	53	selectEnd_(0),
	54	cursorPos_(0)
c7b76823 SA	55	{
	56	setFont(QFont("Courier", 10));
	57
560f8377	58	charWidth_ = fontMetrics().boundingRect('X').width();
c7b76823 SA	59	charHeight_ = fontMetrics().height();
c7b76823 SA	60
560f8377 SA	61	// Determine X coordinates of the three sub-areas
	62	posAddr_ = 0;
	63	posHex_ = 10 * charWidth_ + GAP_ADR_HEX;
c7b76823 SA	64	posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;
c7b76823 SA	65
c7b76823 SA	66	setFocusPolicy(Qt::StrongFocus);
	67	}
	68
628b45cc	69	void QHexView::setMode(Mode m)
c7b76823	70	{
628b45cc SA	71	mode_ = m;
	72
	73	// This is not expected to be set when data is showing,
	74	// so we don't update the viewport here
	75	}
c7b76823	76
628b45cc SA	77	void QHexView::setData(const DecodeBinaryClass* data)
628b45cc SA	78	{
01ba5ed7	79	data_ = data;
628b45cc SA	80
	81	data_size_ = 0;
	82	for (const DecodeBinaryDataChunk& chunk : data_->chunks)
	83	data_size_ += chunk.data.size();
	84
	85	viewport()->update();
	86	}
	87
	88	void QHexView::clear()
	89	{
	90	verticalScrollBar()->setValue(0);
	91	data_ = nullptr;
	92	data_size_ = 0;
b2b18d3a SA	93
b2b18d3a SA	94	viewport()->update();
c7b76823 SA	95	}
	96
	97	void QHexView::showFromOffset(size_t offset)
	98	{
628b45cc	99	if (data_ && (offset < data_size_)) {
c7b76823 SA	100	setCursorPos(offset * 2);
	101
	102	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	103	verticalScrollBar() -> setValue(cursorY);
	104	}
4b97fe09 SA	105
4b97fe09 SA	106	viewport()->update();
c7b76823 SA	107	}
c7b76823 SA	108
628b45cc	109	void QHexView::initialize_byte_iterator(size_t offset)
c7b76823	110	{
628b45cc SA	111	current_chunk_id_ = 0;
	112	current_chunk_offset_ = 0;
	113
	114	for (const DecodeBinaryDataChunk& chunk : data_->chunks)
	115	if (offset >= chunk.data.size()) {
	116	current_chunk_id_++;
	117	offset -= chunk.data.size();
	118	} else {
	119	current_chunk_offset_ = offset;
	120	break;
	121	}
4b97fe09	122
628b45cc SA	123	current_chunk_ = &(data_->chunks[current_chunk_id_]);
	124	}
	125
	126	uint8_t QHexView::get_next_byte(bool* is_next_chunk)
	127	{
	128	if (is_next_chunk != nullptr)
	129	*is_next_chunk = (current_chunk_offset_ == 0);
	130
	131	uint8_t v = current_chunk_->data[current_chunk_offset_];
	132
	133	current_chunk_offset_++;
	134	if (current_chunk_offset_ == current_chunk_->data.size()) {
	135	current_chunk_id_++;
	136	current_chunk_offset_ = 0;
	137	current_chunk_ = &(data_->chunks[current_chunk_id_]);
	138	}
	139
	140	return v;
c7b76823 SA	141	}
c7b76823 SA	142
560f8377	143	QSize QHexView::getFullSize() const
c7b76823	144	{
560f8377 SA	145	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
	146	GAP_ASCII_SLIDER + verticalScrollBar()->width();
	147
01ba5ed7 SA	148	if (!data_)
01ba5ed7 SA	149	return QSize(width, 0);
560f8377	150
628b45cc	151	size_t height = data_size_ / BYTES_PER_LINE;
01ba5ed7	152
628b45cc	153	if (data_size_ % BYTES_PER_LINE)
c7b76823 SA	154	height++;
	155
	156	height *= charHeight_;
	157
	158	return QSize(width, height);
	159	}
	160
	161	void QHexView::paintEvent(QPaintEvent *event)
	162	{
c7b76823 SA	163	QPainter painter(viewport());
c7b76823 SA	164
560f8377	165	// Calculate and update the widget and paint area sizes
560f8377 SA	166	QSize widgetSize = getFullSize();
	167	setMinimumWidth(widgetSize.width());
	168	setMaximumWidth(widgetSize.width());
01ba5ed7	169	QSize areaSize = viewport()->size();
560f8377	170
c7b76823 SA	171	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	172	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);
	173
01ba5ed7 SA	174	// Fill widget background
	175	painter.fillRect(event->rect(), palette().color(QPalette::Base));
	176
628b45cc	177	if (!data_ \|\| (data_size_ == 0)) {
01ba5ed7 SA	178	painter.setPen(palette().color(QPalette::Text));
	179	QString s = tr("No data available");
	180	int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
	181	int y = areaSize.height() / 2;
	182	painter.drawText(x, y, s);
	183	return;
	184	}
	185
	186	// Determine first/last line indices
c7b76823 SA	187	size_t firstLineIdx = verticalScrollBar()->value();
	188
	189	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
628b45cc SA	190	if (lastLineIdx > (data_size_ / BYTES_PER_LINE)) {
	191	lastLineIdx = data_size_ / BYTES_PER_LINE;
	192	if (data_size_ % BYTES_PER_LINE)
c7b76823 SA	193	lastLineIdx++;
	194	}
	195
01ba5ed7	196	// Fill address area background
c7b76823	197	painter.fillRect(QRect(posAddr_, event->rect().top(),
560f8377	198	posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));
c7b76823	199
560f8377 SA	200	// Paint divider line between hex and ASCII areas
	201	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	202	painter.setPen(palette().color(QPalette::Midlight));
	203	painter.drawLine(line_x, event->rect().top(), line_x, height());
c7b76823	204
560f8377 SA	205	// Paint address area
560f8377 SA	206	painter.setPen(palette().color(QPalette::ButtonText));
c7b76823	207
560f8377 SA	208	int yStart = charHeight_;
560f8377 SA	209	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
c7b76823	210
560f8377 SA	211	QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
	212	painter.drawText(posAddr_, y, address);
	213	y += charHeight_;
	214	}
c7b76823	215
560f8377 SA	216	// Paint hex values
	217	QBrush regular = painter.brush();
	218	QBrush selected = QBrush(palette().color(QPalette::Highlight));
c7b76823	219
628b45cc	220	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
560f8377 SA	221	yStart = charHeight_;
	222	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	223
	224	painter.setBackgroundMode(Qt::OpaqueMode);
c7b76823	225
560f8377	226	int x = posHex_;
628b45cc	227	for (size_t i = 0; i < BYTES_PER_LINE && ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < data_size_; i++) {
c7b76823	228	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
c7b76823	229
560f8377	230	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
c7b76823	231	painter.setBackground(selected);
560f8377	232	painter.setPen(palette().color(QPalette::HighlightedText));
c7b76823	233	} else {
560f8377 SA	234	painter.setBackground(regular);
560f8377 SA	235	painter.setPen(palette().color(QPalette::Text));
c7b76823 SA	236	}
c7b76823 SA	237
628b45cc SA	238	// Fetch byte
	239	uint8_t byte_value = get_next_byte();
	240
560f8377	241	// First nibble
628b45cc	242	QString val = QString::number((byte_value & 0xF0) >> 4, 16).toUpper();
560f8377	243	painter.drawText(x, y, val);
c7b76823	244
560f8377	245	// Second nibble
628b45cc	246	val = QString::number((byte_value & 0xF), 16).toUpper();
560f8377	247	painter.drawText(x + charWidth_, y, val);
c7b76823	248
560f8377	249	x += 3 * charWidth_;
c7b76823 SA	250	}
c7b76823 SA	251
560f8377 SA	252	y += charHeight_;
	253	}
	254
	255	// Paint ASCII characters
628b45cc	256	initialize_byte_iterator(firstLineIdx * BYTES_PER_LINE);
560f8377 SA	257	yStart = charHeight_;
	258	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	259
	260	int x = posAscii_;
628b45cc SA	261	for (size_t i = 0; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < data_size_ && (i < BYTES_PER_LINE); i++) {
	262	// Fetch byte
	263	uint8_t ch = get_next_byte();
c7b76823	264
560f8377	265	if ((ch < 0x20) \|\| (ch > 0x7E))
c7b76823 SA	266	ch = '.';
c7b76823 SA	267
560f8377 SA	268	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
	269	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
	270	painter.setBackground(selected);
	271	painter.setPen(palette().color(QPalette::HighlightedText));
	272	} else {
	273	painter.setBackground(regular);
	274	painter.setPen(palette().color(QPalette::Text));
	275	}
	276
	277	painter.drawText(x, y, QString(ch));
	278	x += charWidth_;
c7b76823 SA	279	}
c7b76823 SA	280
560f8377	281	y += charHeight_;
c7b76823 SA	282	}
c7b76823 SA	283
560f8377	284	// Paint cursor
c7b76823 SA	285	if (hasFocus()) {
	286	int x = (cursorPos_ % (2 * BYTES_PER_LINE));
	287	int y = cursorPos_ / (2 * BYTES_PER_LINE);
	288	y -= firstLineIdx;
	289	int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
	290	int cursorY = y * charHeight_ + 4;
560f8377	291	painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
c7b76823 SA	292	}
	293	}
	294
	295	void QHexView::keyPressEvent(QKeyEvent *event)
	296	{
	297	bool setVisible = false;
	298
560f8377	299	// Cursor movements
c7b76823 SA	300	if (event->matches(QKeySequence::MoveToNextChar)) {
	301	setCursorPos(cursorPos_ + 1);
	302	resetSelection(cursorPos_);
	303	setVisible = true;
	304	}
	305	if (event->matches(QKeySequence::MoveToPreviousChar)) {
	306	setCursorPos(cursorPos_ - 1);
	307	resetSelection(cursorPos_);
	308	setVisible = true;
	309	}
	310
	311	if (event->matches(QKeySequence::MoveToEndOfLine)) {
	312	setCursorPos(cursorPos_ \| ((BYTES_PER_LINE * 2) - 1));
	313	resetSelection(cursorPos_);
	314	setVisible = true;
	315	}
	316	if (event->matches(QKeySequence::MoveToStartOfLine)) {
	317	setCursorPos(cursorPos_ \| (cursorPos_ % (BYTES_PER_LINE * 2)));
	318	resetSelection(cursorPos_);
	319	setVisible = true;
	320	}
	321	if (event->matches(QKeySequence::MoveToPreviousLine)) {
	322	setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
	323	resetSelection(cursorPos_);
	324	setVisible = true;
	325	}
	326	if (event->matches(QKeySequence::MoveToNextLine)) {
	327	setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
	328	resetSelection(cursorPos_);
	329	setVisible = true;
	330	}
	331
	332	if (event->matches(QKeySequence::MoveToNextPage)) {
	333	setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	334	resetSelection(cursorPos_);
	335	setVisible = true;
	336	}
	337	if (event->matches(QKeySequence::MoveToPreviousPage)) {
	338	setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	339	resetSelection(cursorPos_);
	340	setVisible = true;
	341	}
	342	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
628b45cc	343	setCursorPos(data_size_ * 2);
c7b76823 SA	344	resetSelection(cursorPos_);
	345	setVisible = true;
	346	}
	347	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
	348	setCursorPos(0);
	349	resetSelection(cursorPos_);
	350	setVisible = true;
	351	}
	352
560f8377	353	// Select commands
c7b76823 SA	354	if (event->matches(QKeySequence::SelectAll)) {
c7b76823 SA	355	resetSelection(0);
628b45cc	356	setSelection(2 * data_size_);
c7b76823 SA	357	setVisible = true;
	358	}
	359	if (event->matches(QKeySequence::SelectNextChar)) {
	360	int pos = cursorPos_ + 1;
	361	setCursorPos(pos);
	362	setSelection(pos);
	363	setVisible = true;
	364	}
	365	if (event->matches(QKeySequence::SelectPreviousChar)) {
	366	int pos = cursorPos_ - 1;
	367	setSelection(pos);
	368	setCursorPos(pos);
	369	setVisible = true;
	370	}
	371	if (event->matches(QKeySequence::SelectEndOfLine)) {
	372	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
	373	setCursorPos(pos);
	374	setSelection(pos);
	375	setVisible = true;
	376	}
	377	if (event->matches(QKeySequence::SelectStartOfLine)) {
	378	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
	379	setCursorPos(pos);
	380	setSelection(pos);
	381	setVisible = true;
	382	}
	383	if (event->matches(QKeySequence::SelectPreviousLine)) {
	384	int pos = cursorPos_ - (2 * BYTES_PER_LINE);
	385	setCursorPos(pos);
	386	setSelection(pos);
	387	setVisible = true;
	388	}
	389	if (event->matches(QKeySequence::SelectNextLine)) {
	390	int pos = cursorPos_ + (2 * BYTES_PER_LINE);
	391	setCursorPos(pos);
	392	setSelection(pos);
	393	setVisible = true;
	394	}
	395
	396	if (event->matches(QKeySequence::SelectNextPage)) {
	397	int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	398	setCursorPos(pos);
	399	setSelection(pos);
	400	setVisible = true;
	401	}
	402	if (event->matches(QKeySequence::SelectPreviousPage)) {
	403	int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	404	setCursorPos(pos);
	405	setSelection(pos);
	406	setVisible = true;
	407	}
	408	if (event->matches(QKeySequence::SelectEndOfDocument)) {
628b45cc	409	int pos = data_size_ * 2;
c7b76823 SA	410	setCursorPos(pos);
	411	setSelection(pos);
	412	setVisible = true;
	413	}
	414	if (event->matches(QKeySequence::SelectStartOfDocument)) {
628b45cc SA	415	setCursorPos(0);
628b45cc SA	416	setSelection(0);
c7b76823 SA	417	setVisible = true;
	418	}
	419
01ba5ed7	420	if (event->matches(QKeySequence::Copy) && (data_)) {
c7b76823	421	QString text;
c7b76823	422
628b45cc	423	initialize_byte_iterator(selectBegin_ / 2);
c7b76823	424
628b45cc SA	425	size_t selectedSize = (selectEnd_ - selectBegin_ + 1) / 2;
	426	for (size_t i = 0; i < selectedSize; i++) {
	427	uint8_t byte_value = get_next_byte();
	428
	429	QString s = QString::number((byte_value & 0xF0) >> 4, 16).toUpper() +
	430	QString::number((byte_value & 0xF), 16).toUpper() + " ";
	431	text += s;
c7b76823	432
628b45cc SA	433	if (i % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
628b45cc SA	434	text += "\n";
c7b76823 SA	435	}
	436
	437	QClipboard *clipboard = QApplication::clipboard();
628b45cc	438	clipboard->setText(text, QClipboard::Clipboard);
c7b76823	439	if (clipboard->supportsSelection())
628b45cc	440	clipboard->setText(text, QClipboard::Selection);
c7b76823 SA	441	}
	442
	443	if (setVisible)
	444	ensureVisible();
	445
	446	viewport()->update();
	447	}
	448
	449	void QHexView::mouseMoveEvent(QMouseEvent *event)
	450	{
560f8377	451	int actPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	452	setCursorPos(actPos);
	453	setSelection(actPos);
	454
	455	viewport()->update();
	456	}
	457
	458	void QHexView::mousePressEvent(QMouseEvent *event)
	459	{
560f8377	460	int cPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	461
	462	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
	463	setSelection(cPos);
	464	else
	465	resetSelection(cPos);
	466
	467	setCursorPos(cPos);
	468
	469	viewport()->update();
	470	}
	471
560f8377	472	size_t QHexView::cursorPosFromMousePos(const QPoint &position)
c7b76823	473	{
628b45cc	474	size_t pos = -1;
c7b76823 SA	475
	476	if (((size_t)position.x() >= posHex_) &&
	477	((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {
	478
560f8377 SA	479	// Note: We add 1.5 character widths so that selection across
560f8377 SA	480	// byte gaps is smoother
628b45cc	481	size_t x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;
c7b76823	482
560f8377 SA	483	// Note: We allow only full bytes to be selected, not nibbles,
	484	// so we round to the nearest byte gap
	485	x = (2 * x + 1) / 3;
c7b76823	486
628b45cc SA	487	size_t firstLineIdx = verticalScrollBar()->value();
628b45cc SA	488	size_t y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
c7b76823 SA	489	pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	490	}
	491
628b45cc SA	492	size_t max_pos = data_size_ * 2;
	493
	494	return std::min(pos, max_pos);
c7b76823 SA	495	}
	496
	497	void QHexView::resetSelection()
	498	{
	499	selectBegin_ = selectInit_;
	500	selectEnd_ = selectInit_;
	501	}
	502
	503	void QHexView::resetSelection(int pos)
	504	{
	505	if (pos < 0)
	506	pos = 0;
	507
	508	selectInit_ = pos;
	509	selectBegin_ = pos;
	510	selectEnd_ = pos;
	511	}
	512
	513	void QHexView::setSelection(int pos)
	514	{
	515	if (pos < 0)
	516	pos = 0;
	517
	518	if ((size_t)pos >= selectInit_) {
	519	selectEnd_ = pos;
	520	selectBegin_ = selectInit_;
	521	} else {
	522	selectBegin_ = pos;
	523	selectEnd_ = selectInit_;
	524	}
	525	}
	526
	527	void QHexView::setCursorPos(int position)
	528	{
	529	if (position < 0)
	530	position = 0;
	531
628b45cc	532	int max_pos = data_size_ * 2;
c7b76823	533
628b45cc SA	534	if (position > max_pos)
628b45cc SA	535	position = max_pos;
c7b76823 SA	536
	537	cursorPos_ = position;
	538	}
	539
	540	void QHexView::ensureVisible()
	541	{
	542	QSize areaSize = viewport()->size();
	543
628b45cc	544	int firstLineIdx = verticalScrollBar()->value();
c7b76823 SA	545	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	546
	547	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	548
	549	if (cursorY < firstLineIdx)
628b45cc SA	550	verticalScrollBar()->setValue(cursorY);
	551	else
	552	if(cursorY >= lastLineIdx)
	553	verticalScrollBar()->setValue(cursorY - areaSize.height() / charHeight_ + 1);
c7b76823	554	}