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// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#include "memoryview.h"
///////////////////////////
// Minimal reserved range in pixels of scroll area (otherwise 10% of height are used)
#define MIN_OFF 10
// Focus point (this is multiplied with height of widget to know position where we want to focus)
#define FOCUS 0.25
// How angle maps to pixels when and scroll is used
#define ANGLE_SCROLL 1
///////////////////////////
MemoryView::MemoryView(QWidget *parent, std::uint32_t addr0) : QWidget(parent) {
memory = nullptr;
addr_0 = addr0;
change_counter = 0;
layout = new QVBoxLayout(this);
memf= new Frame(this);
layout->addWidget(memf);
ctl_widg = new QWidget(this);
layout->addWidget(ctl_widg);
go_edit = new QLineEdit(ctl_widg);
go_edit->setText("0x00000000");
go_edit->setInputMask("\\0\\xHHHHHHHH");
layout->addWidget(go_edit);
connect(go_edit, SIGNAL(editingFinished()), this, SLOT(go_edit_finish()));
}
void MemoryView::setup(machine::QtMipsMachine *machine) {
memory = (machine == nullptr) ? nullptr : machine->memory();
if (machine != nullptr)
connect(machine, SIGNAL(post_tick()), this, SLOT(check_for_updates()));
reload_content();
}
void MemoryView::set_focus(std::uint32_t address) {
if (address < addr_0 || (address - addr_0)/4 > (unsigned)memf->widg->count()) {
// This is outside of loaded area so just move it and reload everything
addr_0 = address - 4*memf->focussed();
addr0_save_change(addr_0);
reload_content();
} else {
memf->focus((address - addr_0) / 4);
}
edit_load_focus();
}
std::uint32_t MemoryView::focus() const {
return addr_0 + 4*memf->focussed();
}
std::uint32_t MemoryView::addr0() const {
return addr_0;
}
void MemoryView::edit_load_focus() {
go_edit->setText(QString("0x%1").arg(focus(), 8, 16, QChar('0')));
}
void MemoryView::check_for_updates() {
if (memory != nullptr) {
if (change_counter != memory->get_change_counter())
reload_content();
}
}
void MemoryView::reload_content() {
int count = memf->widg->count();
memf->widg->clearRows();
if (memory != nullptr)
change_counter = memory->get_change_counter();
update_content(count, 0);
}
void MemoryView::update_content(int count, int shift) {
if (abs(shift) >= memf->widg->count()) {
// This shifts more than we have so just reload whole content
memf->widg->clearRows();
addr_0 += 4*shift;
for (int i = 0; i <= count; i++)
memf->widg->addRow(row_widget(addr_0 + 4*i, memf->widg));
return;
}
int diff = count - memf->widg->count();
int d_b = shift;
int d_e = diff - shift;
if (d_b > 0)
for (int i = 0; i < d_b; i++) {
addr_0 -= 4;
memf->widg->insertRow(row_widget(addr_0, memf->widg), 0);
}
else
for (int i = 0; i > d_b; i--) {
addr_0 += 4;
memf->widg->removeRow(0);
}
if (d_e > 0)
for (int i = 0; i < d_e; i++)
memf->widg->addRow(row_widget(addr_0 + 4*memf->widg->count(), memf->widg));
else
for (int i = 0; i > d_e; i--)
memf->widg->removeRow(memf->widg->count() - 1);
addr0_save_change(addr_0);
}
void MemoryView::addr0_save_change(std::uint32_t val) { /* ignore */ }
void MemoryView::go_edit_finish() {
QString hex = go_edit->text();
hex.remove(0, 2);
bool ok;
std::uint32_t nw = hex.toUInt(&ok, 16);
if (ok) {
set_focus(nw);
} else
edit_load_focus();
}
MemoryView::Frame::Frame(MemoryView *parent) : QAbstractScrollArea(parent) {
mv = parent;
content_y = -3*MIN_OFF/2; // When this is initialized the width is 0 so this uses just min to inialize it
widg = new StaticTable(this);
setViewport(widg);
setFrameShape(QFrame::NoFrame);
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
setContentsMargins(0, 0, 0, 0);
}
void MemoryView::Frame::focus(unsigned i) {
content_y = (FOCUS*height()) - widg->row_size()*i/widg->columns() - widg->row_size()/2;
viewport()->move(0, content_y);
viewport()->repaint(0, content_y, width(), height());
check_update();
}
// Calculate which row is in focus at the moment
unsigned MemoryView::Frame::focussed() {
int h = (FOCUS*height() - content_y) / widg->row_size() * widg->columns();
return qMax(h, 0);
}
// This verifies that we are not scrolled too far away down or up and that we have enought height
// We make 10% of height as buffer zone with fixed minimum in pixels
void MemoryView::Frame::check_update() {
int hpart = qMax(height()/10, MIN_OFF);
int req_height = height() + 2*hpart;
if ((content_y < -hpart) && (content_y > -2*hpart) && (widg->height() >= req_height))
return;
int row_h = widg->row_size();
// Calculate how many we need and how much we need to move and update content accordingly
int count = (req_height / row_h) + 1;
int shift = (content_y + hpart + hpart/2)/row_h;
mv->update_content(count * widg->columns(), shift * widg->columns());
// Move and resize widget
content_y -= shift * row_h;
widg->setGeometry(0, content_y, width(), count * row_h);
mv->edit_load_focus();
}
void MemoryView::Frame::resizeEvent(QResizeEvent *e) {
QAbstractScrollArea::resizeEvent(e);
widg->setGeometry(0, content_y, e->size().width(), widg->heightForWidth(e->size().width()));
check_update();
}
void MemoryView::Frame::wheelEvent(QWheelEvent *e) {
QPoint pix = e->pixelDelta();
QPoint ang = e->angleDelta();
if (!pix.isNull())
content_y += pix.ry();
else if (!ang.isNull())
content_y += ang.ry() * ANGLE_SCROLL;
// TODO smooth scroll
viewport()->move(0, content_y);
viewport()->repaint(0, content_y, width(), height());
check_update();
}
bool MemoryView::Frame::viewportEvent(QEvent *e) {
bool p = QAbstractScrollArea::viewportEvent(e);
// Pass paint event to viewport widget
if (e->type() == QEvent::Paint)
p = false;
return p;
}
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