[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),
	data_(nullptr)
{
	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::setData(QByteArray *data)
{
	verticalScrollBar()->setValue(0);

	data_ = data;
	cursorPos_ = 0;
	resetSelection(0);

	viewport()->update();
}

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

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

	viewport()->update();
}

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

	viewport()->update();
}

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_->count() / BYTES_PER_LINE;

	if (data_->count() % 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_->count() / BYTES_PER_LINE)) {
		lastLineIdx = data_->count() / BYTES_PER_LINE;
		if (data_->count() % 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));
	QByteArray data = data_->mid(firstLineIdx * BYTES_PER_LINE,
		(lastLineIdx - 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) < (size_t)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));
			}

			// First nibble
			QString val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF0) >> 4, 16).toUpper();
			painter.drawText(x, y, val);

			// Second nibble
			val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF), 16).toUpper();
			painter.drawText(x + charWidth_, y, val);

			x += 3 * charWidth_;
		}

		y += charHeight_;
	}

	// Paint ASCII characters
	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) < (size_t)data.size() && (i < BYTES_PER_LINE); i++) {
			char ch = data[(unsigned int)((lineIdx - firstLineIdx) * BYTES_PER_LINE + i)];

			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)) {
		if (data_)
			setCursorPos(data_->count() * 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);
		if (data_)
			setSelection(2 * data_->count() + 1);
		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 = 0;
		if (data_)
			pos = data_->count() * 2;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectStartOfDocument)) {
		int pos = 0;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}

	if (event->matches(QKeySequence::Copy) && (data_)) {
		QString text;
		int idx = 0;
		int copyOffset = 0;

		QByteArray data = data_->mid(selectBegin_ / 2, (selectEnd_ - selectBegin_) / 2 + 1);
		if (selectBegin_ % 2) {
			text += QString::number((data.at((idx+1) / 2) & 0xF), 16);
			text += " ";
			idx++;
			copyOffset = 1;
		}

		int selectedSize = selectEnd_ - selectBegin_;
		while (idx < selectedSize) {
			QString val = QString::number((data.at((copyOffset + idx) / 2) & 0xF0) >> 4, 16);
			if ((idx + 1) < selectedSize) {
				val += QString::number((data.at((copyOffset + idx) / 2) & 0xF), 16);
				val += " ";
			}
			text += val;

			if ((idx/2) % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
				text += "\n";

			idx += 2;
		}

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

	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)
{
	int 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
		int 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;

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

	return 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 maxPos = 0;
	if (data_)
		maxPos = data_->count() * 2;

	if (position > maxPos)
		position = maxPos;

	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),
01ba5ed7	50	data_(nullptr)
c7b76823 SA	51	{
	52	setFont(QFont("Courier", 10));
	53
560f8377	54	charWidth_ = fontMetrics().boundingRect('X').width();
c7b76823 SA	55	charHeight_ = fontMetrics().height();
c7b76823 SA	56
560f8377 SA	57	// Determine X coordinates of the three sub-areas
	58	posAddr_ = 0;
	59	posHex_ = 10 * charWidth_ + GAP_ADR_HEX;
c7b76823 SA	60	posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;
c7b76823 SA	61
c7b76823 SA	62	setFocusPolicy(Qt::StrongFocus);
	63	}
	64
01ba5ed7	65	void QHexView::setData(QByteArray *data)
c7b76823 SA	66	{
	67	verticalScrollBar()->setValue(0);
	68
01ba5ed7	69	data_ = data;
c7b76823 SA	70	cursorPos_ = 0;
c7b76823 SA	71	resetSelection(0);
b2b18d3a SA	72
b2b18d3a SA	73	viewport()->update();
c7b76823 SA	74	}
	75
	76	void QHexView::showFromOffset(size_t offset)
	77	{
01ba5ed7	78	if (data_ && (offset < (size_t)data_->count())) {
c7b76823 SA	79	setCursorPos(offset * 2);
	80
	81	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	82	verticalScrollBar() -> setValue(cursorY);
	83	}
4b97fe09 SA	84
4b97fe09 SA	85	viewport()->update();
c7b76823 SA	86	}
	87
	88	void QHexView::clear()
	89	{
	90	verticalScrollBar()->setValue(0);
01ba5ed7	91	data_ = nullptr;
4b97fe09 SA	92
4b97fe09 SA	93	viewport()->update();
c7b76823 SA	94	}
c7b76823 SA	95
560f8377	96	QSize QHexView::getFullSize() const
c7b76823	97	{
560f8377 SA	98	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
	99	GAP_ASCII_SLIDER + verticalScrollBar()->width();
	100
01ba5ed7 SA	101	if (!data_)
01ba5ed7 SA	102	return QSize(width, 0);
560f8377	103
01ba5ed7 SA	104	size_t height = data_->count() / BYTES_PER_LINE;
	105
	106	if (data_->count() % BYTES_PER_LINE)
c7b76823 SA	107	height++;
	108
	109	height *= charHeight_;
	110
	111	return QSize(width, height);
	112	}
	113
	114	void QHexView::paintEvent(QPaintEvent *event)
	115	{
c7b76823 SA	116	QPainter painter(viewport());
c7b76823 SA	117
560f8377	118	// Calculate and update the widget and paint area sizes
560f8377 SA	119	QSize widgetSize = getFullSize();
	120	setMinimumWidth(widgetSize.width());
	121	setMaximumWidth(widgetSize.width());
01ba5ed7	122	QSize areaSize = viewport()->size();
560f8377	123
c7b76823 SA	124	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	125	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);
	126
01ba5ed7 SA	127	// Fill widget background
	128	painter.fillRect(event->rect(), palette().color(QPalette::Base));
	129
4b97fe09	130	if (!data_ \|\| (data_->size() == 0)) {
01ba5ed7 SA	131	painter.setPen(palette().color(QPalette::Text));
	132	QString s = tr("No data available");
	133	int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
	134	int y = areaSize.height() / 2;
	135	painter.drawText(x, y, s);
	136	return;
	137	}
	138
	139	// Determine first/last line indices
c7b76823 SA	140	size_t firstLineIdx = verticalScrollBar()->value();
	141
	142	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
01ba5ed7 SA	143	if (lastLineIdx > (data_->count() / BYTES_PER_LINE)) {
	144	lastLineIdx = data_->count() / BYTES_PER_LINE;
	145	if (data_->count() % BYTES_PER_LINE)
c7b76823 SA	146	lastLineIdx++;
	147	}
	148
01ba5ed7	149	// Fill address area background
c7b76823	150	painter.fillRect(QRect(posAddr_, event->rect().top(),
560f8377	151	posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));
c7b76823	152
560f8377 SA	153	// Paint divider line between hex and ASCII areas
	154	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	155	painter.setPen(palette().color(QPalette::Midlight));
	156	painter.drawLine(line_x, event->rect().top(), line_x, height());
c7b76823	157
560f8377 SA	158	// Paint address area
560f8377 SA	159	painter.setPen(palette().color(QPalette::ButtonText));
c7b76823	160
560f8377 SA	161	int yStart = charHeight_;
560f8377 SA	162	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
c7b76823	163
560f8377 SA	164	QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
	165	painter.drawText(posAddr_, y, address);
	166	y += charHeight_;
	167	}
c7b76823	168
560f8377 SA	169	// Paint hex values
	170	QBrush regular = painter.brush();
	171	QBrush selected = QBrush(palette().color(QPalette::Highlight));
01ba5ed7 SA	172	QByteArray data = data_->mid(firstLineIdx * BYTES_PER_LINE,
01ba5ed7 SA	173	(lastLineIdx - firstLineIdx) * BYTES_PER_LINE);
c7b76823	174
560f8377 SA	175	yStart = charHeight_;
	176	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	177
	178	painter.setBackgroundMode(Qt::OpaqueMode);
c7b76823	179
560f8377	180	int x = posHex_;
c7b76823 SA	181	for (size_t i = 0; i < BYTES_PER_LINE && ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size(); i++) {
c7b76823 SA	182	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
c7b76823	183
560f8377	184	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
c7b76823	185	painter.setBackground(selected);
560f8377	186	painter.setPen(palette().color(QPalette::HighlightedText));
c7b76823	187	} else {
560f8377 SA	188	painter.setBackground(regular);
560f8377 SA	189	painter.setPen(palette().color(QPalette::Text));
c7b76823 SA	190	}
c7b76823 SA	191
560f8377 SA	192	// First nibble
	193	QString val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF0) >> 4, 16).toUpper();
	194	painter.drawText(x, y, val);
c7b76823	195
560f8377 SA	196	// Second nibble
	197	val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF), 16).toUpper();
	198	painter.drawText(x + charWidth_, y, val);
c7b76823	199
560f8377	200	x += 3 * charWidth_;
c7b76823 SA	201	}
c7b76823 SA	202
560f8377 SA	203	y += charHeight_;
	204	}
	205
	206	// Paint ASCII characters
	207	yStart = charHeight_;
	208	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	209
	210	int x = posAscii_;
c7b76823 SA	211	for (size_t i = 0; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size() && (i < BYTES_PER_LINE); i++) {
	212	char ch = data[(unsigned int)((lineIdx - firstLineIdx) * BYTES_PER_LINE + i)];
	213
560f8377	214	if ((ch < 0x20) \|\| (ch > 0x7E))
c7b76823 SA	215	ch = '.';
c7b76823 SA	216
560f8377 SA	217	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
	218	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
	219	painter.setBackground(selected);
	220	painter.setPen(palette().color(QPalette::HighlightedText));
	221	} else {
	222	painter.setBackground(regular);
	223	painter.setPen(palette().color(QPalette::Text));
	224	}
	225
	226	painter.drawText(x, y, QString(ch));
	227	x += charWidth_;
c7b76823 SA	228	}
c7b76823 SA	229
560f8377	230	y += charHeight_;
c7b76823 SA	231	}
c7b76823 SA	232
560f8377	233	// Paint cursor
c7b76823 SA	234	if (hasFocus()) {
	235	int x = (cursorPos_ % (2 * BYTES_PER_LINE));
	236	int y = cursorPos_ / (2 * BYTES_PER_LINE);
	237	y -= firstLineIdx;
	238	int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
	239	int cursorY = y * charHeight_ + 4;
560f8377	240	painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
c7b76823 SA	241	}
	242	}
	243
	244	void QHexView::keyPressEvent(QKeyEvent *event)
	245	{
	246	bool setVisible = false;
	247
560f8377	248	// Cursor movements
c7b76823 SA	249	if (event->matches(QKeySequence::MoveToNextChar)) {
	250	setCursorPos(cursorPos_ + 1);
	251	resetSelection(cursorPos_);
	252	setVisible = true;
	253	}
	254	if (event->matches(QKeySequence::MoveToPreviousChar)) {
	255	setCursorPos(cursorPos_ - 1);
	256	resetSelection(cursorPos_);
	257	setVisible = true;
	258	}
	259
	260	if (event->matches(QKeySequence::MoveToEndOfLine)) {
	261	setCursorPos(cursorPos_ \| ((BYTES_PER_LINE * 2) - 1));
	262	resetSelection(cursorPos_);
	263	setVisible = true;
	264	}
	265	if (event->matches(QKeySequence::MoveToStartOfLine)) {
	266	setCursorPos(cursorPos_ \| (cursorPos_ % (BYTES_PER_LINE * 2)));
	267	resetSelection(cursorPos_);
	268	setVisible = true;
	269	}
	270	if (event->matches(QKeySequence::MoveToPreviousLine)) {
	271	setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
	272	resetSelection(cursorPos_);
	273	setVisible = true;
	274	}
	275	if (event->matches(QKeySequence::MoveToNextLine)) {
	276	setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
	277	resetSelection(cursorPos_);
	278	setVisible = true;
	279	}
	280
	281	if (event->matches(QKeySequence::MoveToNextPage)) {
	282	setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	283	resetSelection(cursorPos_);
	284	setVisible = true;
	285	}
	286	if (event->matches(QKeySequence::MoveToPreviousPage)) {
	287	setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	288	resetSelection(cursorPos_);
	289	setVisible = true;
	290	}
	291	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
01ba5ed7 SA	292	if (data_)
01ba5ed7 SA	293	setCursorPos(data_->count() * 2);
c7b76823 SA	294	resetSelection(cursorPos_);
	295	setVisible = true;
	296	}
	297	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
	298	setCursorPos(0);
	299	resetSelection(cursorPos_);
	300	setVisible = true;
	301	}
	302
560f8377	303	// Select commands
c7b76823 SA	304	if (event->matches(QKeySequence::SelectAll)) {
c7b76823 SA	305	resetSelection(0);
01ba5ed7 SA	306	if (data_)
01ba5ed7 SA	307	setSelection(2 * data_->count() + 1);
c7b76823 SA	308	setVisible = true;
	309	}
	310	if (event->matches(QKeySequence::SelectNextChar)) {
	311	int pos = cursorPos_ + 1;
	312	setCursorPos(pos);
	313	setSelection(pos);
	314	setVisible = true;
	315	}
	316	if (event->matches(QKeySequence::SelectPreviousChar)) {
	317	int pos = cursorPos_ - 1;
	318	setSelection(pos);
	319	setCursorPos(pos);
	320	setVisible = true;
	321	}
	322	if (event->matches(QKeySequence::SelectEndOfLine)) {
	323	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
	324	setCursorPos(pos);
	325	setSelection(pos);
	326	setVisible = true;
	327	}
	328	if (event->matches(QKeySequence::SelectStartOfLine)) {
	329	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
	330	setCursorPos(pos);
	331	setSelection(pos);
	332	setVisible = true;
	333	}
	334	if (event->matches(QKeySequence::SelectPreviousLine)) {
	335	int pos = cursorPos_ - (2 * BYTES_PER_LINE);
	336	setCursorPos(pos);
	337	setSelection(pos);
	338	setVisible = true;
	339	}
	340	if (event->matches(QKeySequence::SelectNextLine)) {
	341	int pos = cursorPos_ + (2 * BYTES_PER_LINE);
	342	setCursorPos(pos);
	343	setSelection(pos);
	344	setVisible = true;
	345	}
	346
	347	if (event->matches(QKeySequence::SelectNextPage)) {
	348	int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	349	setCursorPos(pos);
	350	setSelection(pos);
	351	setVisible = true;
	352	}
	353	if (event->matches(QKeySequence::SelectPreviousPage)) {
	354	int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	355	setCursorPos(pos);
	356	setSelection(pos);
	357	setVisible = true;
	358	}
	359	if (event->matches(QKeySequence::SelectEndOfDocument)) {
	360	int pos = 0;
01ba5ed7 SA	361	if (data_)
01ba5ed7 SA	362	pos = data_->count() * 2;
c7b76823 SA	363	setCursorPos(pos);
	364	setSelection(pos);
	365	setVisible = true;
	366	}
	367	if (event->matches(QKeySequence::SelectStartOfDocument)) {
	368	int pos = 0;
	369	setCursorPos(pos);
	370	setSelection(pos);
	371	setVisible = true;
	372	}
	373
01ba5ed7	374	if (event->matches(QKeySequence::Copy) && (data_)) {
c7b76823 SA	375	QString text;
	376	int idx = 0;
	377	int copyOffset = 0;
	378
01ba5ed7	379	QByteArray data = data_->mid(selectBegin_ / 2, (selectEnd_ - selectBegin_) / 2 + 1);
c7b76823 SA	380	if (selectBegin_ % 2) {
	381	text += QString::number((data.at((idx+1) / 2) & 0xF), 16);
	382	text += " ";
	383	idx++;
	384	copyOffset = 1;
	385	}
	386
	387	int selectedSize = selectEnd_ - selectBegin_;
	388	while (idx < selectedSize) {
	389	QString val = QString::number((data.at((copyOffset + idx) / 2) & 0xF0) >> 4, 16);
	390	if ((idx + 1) < selectedSize) {
	391	val += QString::number((data.at((copyOffset + idx) / 2) & 0xF), 16);
	392	val += " ";
	393	}
	394	text += val;
	395
	396	if ((idx/2) % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
	397	text += "\n";
	398
	399	idx += 2;
	400	}
	401
	402	QClipboard *clipboard = QApplication::clipboard();
	403	clipboard->setText(text);
	404	if (clipboard->supportsSelection())
	405	clipboard->setText(text);
	406	}
	407
	408	if (setVisible)
	409	ensureVisible();
	410
	411	viewport()->update();
	412	}
	413
	414	void QHexView::mouseMoveEvent(QMouseEvent *event)
	415	{
560f8377	416	int actPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	417	setCursorPos(actPos);
	418	setSelection(actPos);
	419
	420	viewport()->update();
	421	}
	422
	423	void QHexView::mousePressEvent(QMouseEvent *event)
	424	{
560f8377	425	int cPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	426
	427	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
	428	setSelection(cPos);
	429	else
	430	resetSelection(cPos);
	431
	432	setCursorPos(cPos);
	433
	434	viewport()->update();
	435	}
	436
560f8377	437	size_t QHexView::cursorPosFromMousePos(const QPoint &position)
c7b76823 SA	438	{
	439	int pos = -1;
	440
	441	if (((size_t)position.x() >= posHex_) &&
	442	((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {
	443
560f8377 SA	444	// Note: We add 1.5 character widths so that selection across
	445	// byte gaps is smoother
	446	int x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;
c7b76823	447
560f8377 SA	448	// Note: We allow only full bytes to be selected, not nibbles,
	449	// so we round to the nearest byte gap
	450	x = (2 * x + 1) / 3;
c7b76823 SA	451
	452	int firstLineIdx = verticalScrollBar()->value();
	453	int y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
	454	pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	455	}
	456
	457	return pos;
	458	}
	459
	460	void QHexView::resetSelection()
	461	{
	462	selectBegin_ = selectInit_;
	463	selectEnd_ = selectInit_;
	464	}
	465
	466	void QHexView::resetSelection(int pos)
	467	{
	468	if (pos < 0)
	469	pos = 0;
	470
	471	selectInit_ = pos;
	472	selectBegin_ = pos;
	473	selectEnd_ = pos;
	474	}
	475
	476	void QHexView::setSelection(int pos)
	477	{
	478	if (pos < 0)
	479	pos = 0;
	480
	481	if ((size_t)pos >= selectInit_) {
	482	selectEnd_ = pos;
	483	selectBegin_ = selectInit_;
	484	} else {
	485	selectBegin_ = pos;
	486	selectEnd_ = selectInit_;
	487	}
	488	}
	489
	490	void QHexView::setCursorPos(int position)
	491	{
	492	if (position < 0)
	493	position = 0;
	494
	495	int maxPos = 0;
b605e3c3	496	if (data_)
01ba5ed7	497	maxPos = data_->count() * 2;
c7b76823 SA	498
	499	if (position > maxPos)
	500	position = maxPos;
	501
	502	cursorPos_ = position;
	503	}
	504
	505	void QHexView::ensureVisible()
	506	{
	507	QSize areaSize = viewport()->size();
	508
	509	int firstLineIdx = verticalScrollBar() -> value();
	510	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	511
	512	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	513
	514	if (cursorY < firstLineIdx)
	515	verticalScrollBar() -> setValue(cursorY);
	516	else if(cursorY >= lastLineIdx)
	517	verticalScrollBar() -> setValue(cursorY - areaSize.height() / charHeight_ + 1);
	518	}