[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);
}

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);
	}
}

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

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_) {
		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 (data_->count() % BYTES_PER_LINE)
			maxPos++;
	}

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