kwin/virtualdesktops.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2009 Lucas Murray <lmurray@undefinedfire.com>
Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
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, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "virtualdesktops.h"
// KDE
#include <KDE/KAction>
#include <KDE/KActionCollection>
#include <KDE/KConfigGroup>
#include <KDE/KLocalizedString>
#include <KDE/NETRootInfo>
namespace KWin {
extern int screen_number;
VirtualDesktopGrid::VirtualDesktopGrid()
: m_size(1, 2) // Default to tow rows
, m_grid(new uint[2])
{
// Initializing grid array
m_grid[0] = 0;
m_grid[1] = 0;
}
VirtualDesktopGrid::~VirtualDesktopGrid()
{
delete[] m_grid;
}
void VirtualDesktopGrid::update(const QSize &size, Qt::Orientation orientation)
{
// Set private variables
delete[] m_grid;
m_size = size;
const uint width = size.width();
const uint height = size.height();
const uint length = width * height;
const uint desktopCount = VirtualDesktopManager::self()->count();
m_grid = new uint[length];
// Populate grid
uint desktop = 1;
if (orientation == Qt::Horizontal) {
for (uint y = 0; y < height; ++y) {
for (uint x = 0; x < width; ++x) {
m_grid[y * width + x] = (desktop <= desktopCount ? desktop++ : 0);
}
}
} else {
for (uint x = 0; x < width; ++x) {
for (uint y = 0; y < height; ++y) {
m_grid[y * width + x] = (desktop <= desktopCount ? desktop++ : 0);
}
}
}
}
QPoint VirtualDesktopGrid::gridCoords(uint id) const
{
for (int y = 0; y < m_size.height(); ++y) {
for (int x = 0; x < m_size.width(); ++x) {
if (m_grid[y * m_size.width() + x] == id) {
return QPoint(x, y);
}
}
}
return QPoint(-1, -1);
}
KWIN_SINGLETON_FACTORY_VARIABLE(VirtualDesktopManager, s_manager)
VirtualDesktopManager::VirtualDesktopManager(QObject *parent)
: QObject(parent)
, m_current(0)
, m_count(0)
, m_navigationWrapsAround(false)
, m_rootInfo(NULL)
{
}
VirtualDesktopManager::~VirtualDesktopManager()
{
s_manager = NULL;
}
QString VirtualDesktopManager::name(uint desktop) const
{
if (!m_rootInfo) {
return defaultName(desktop);
}
return QString::fromUtf8(m_rootInfo->desktopName(desktop));
}
uint VirtualDesktopManager::above(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
QPoint coords = m_grid.gridCoords(id);
Q_ASSERT(coords.x() >= 0);
while (true) {
coords.ry()--;
if (coords.y() < 0) {
if (wrap) {
coords.setY(m_grid.height() - 1);
} else {
return id; // Already at the top-most desktop
}
}
const uint desktop = m_grid.at(coords);
if (desktop > 0) {
return desktop;
}
}
}
uint VirtualDesktopManager::toRight(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
QPoint coords = m_grid.gridCoords(id);
Q_ASSERT(coords.x() >= 0);
while (true) {
coords.rx()++;
if (coords.x() >= m_grid.width()) {
if (wrap) {
coords.setX(0);
} else {
return id; // Already at the right-most desktop
}
}
const uint desktop = m_grid.at(coords);
if (desktop > 0) {
return desktop;
}
}
}
uint VirtualDesktopManager::below(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
QPoint coords = m_grid.gridCoords(id);
Q_ASSERT(coords.x() >= 0);
while (true) {
coords.ry()++;
if (coords.y() >= m_grid.height()) {
if (wrap) {
coords.setY(0);
} else {
// Already at the bottom-most desktop
return id;
}
}
const uint desktop = m_grid.at(coords);
if (desktop > 0) {
return desktop;
}
}
}
uint VirtualDesktopManager::toLeft(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
QPoint coords = m_grid.gridCoords(id);
Q_ASSERT(coords.x() >= 0);
while (true) {
coords.rx()--;
if (coords.x() < 0) {
if (wrap) {
coords.setX(m_grid.width() - 1);
} else {
return id; // Already at the left-most desktop
}
}
const uint desktop = m_grid.at(coords);
if (desktop > 0) {
return desktop;
}
}
}
uint VirtualDesktopManager::next(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
const uint desktop = id + 1;
if (desktop > count()) {
if (wrap) {
return 1;
} else {
// are at the last desktop, without wrap return current
return id;
}
}
return desktop;
}
uint VirtualDesktopManager::previous(uint id, bool wrap) const
{
if (id == 0) {
id = current();
}
const uint desktop = id - 1;
if (desktop == 0) {
if (wrap) {
return count();
} else {
// are at the first desktop, without wrap return current
return id;
}
}
return desktop;
}
bool VirtualDesktopManager::setCurrent(uint newDesktop)
{
if (newDesktop < 1 || newDesktop > count() || newDesktop == m_current) {
return false;
}
const uint oldDesktop = m_current;
// change the desktop
m_current = newDesktop;
emit currentChanged(oldDesktop, newDesktop);
return true;
}
void VirtualDesktopManager::setCount(uint count)
{
count = qBound<uint>(1, count, VirtualDesktopManager::maximum());
if (count == m_count) {
// nothing to change
return;
}
const uint oldCount = m_count;
m_count = count;
if (oldCount > m_count) {
handleDesktopsRemoved(oldCount);
}
updateRootInfo();
save();
emit countChanged(oldCount, m_count);
}
void VirtualDesktopManager::handleDesktopsRemoved(uint previousCount)
{
if (current() > count()) {
setCurrent(count());
}
emit desktopsRemoved(previousCount);
}
void VirtualDesktopManager::updateRootInfo()
{
if (!m_rootInfo) {
// Make sure the layout is still valid
updateLayout();
return;
}
const int n = count();
m_rootInfo->setNumberOfDesktops(n);
NETPoint *viewports = new NETPoint[n];
m_rootInfo->setDesktopViewport(n, *viewports);
delete[] viewports;
// Make sure the layout is still valid
updateLayout();
}
void VirtualDesktopManager::updateLayout()
{
int width = 0;
int height = 0;
Qt::Orientation orientation = Qt::Horizontal;
if (m_rootInfo) {
// TODO: Is there a sane way to avoid overriding the existing grid?
width = m_rootInfo->desktopLayoutColumnsRows().width();
height = m_rootInfo->desktopLayoutColumnsRows().height();
orientation = m_rootInfo->desktopLayoutOrientation() == NET::OrientationHorizontal ? Qt::Horizontal : Qt::Vertical;
}
if (width == 0 && height == 0) {
// Not given, set default layout
height = 2;
}
setNETDesktopLayout(orientation,
width, height, 0 //rootInfo->desktopLayoutCorner() // Not really worth implementing right now.
);
}
static bool s_loadingDesktopSettings = false;
void VirtualDesktopManager::load()
{
s_loadingDesktopSettings = true;
if (m_config.isNull()) {
return;
}
QString groupname;
if (screen_number == 0) {
groupname = "Desktops";
} else {
groupname.sprintf("Desktops-screen-%d", screen_number);
}
KConfigGroup group(m_config, groupname);
const int n = group.readEntry("Number", 1);
setCount(n);
if (m_rootInfo) {
for (int i = 1; i <= n; i++) {
QString s = group.readEntry(QString("Name_%1").arg(i), i18n("Desktop %1", i));
m_rootInfo->setDesktopName(i, s.toUtf8().data());
// TODO: update desktop focus chain, why?
// m_desktopFocusChain.value()[i-1] = i;
}
int rows = group.readEntry<int>("Rows", 2);
rows = qBound(1, rows, n);
// avoid weird cases like having 3 rows for 4 desktops, where the last row is unused
int columns = n / rows;
if (n % rows > 0) {
columns++;
}
m_rootInfo->setDesktopLayout(NET::OrientationHorizontal, columns, rows, NET::DesktopLayoutCornerTopLeft);
m_rootInfo->activate();
}
s_loadingDesktopSettings = false;
}
void VirtualDesktopManager::save()
{
if (s_loadingDesktopSettings) {
return;
}
if (m_config.isNull()) {
return;
}
QString groupname;
if (screen_number == 0) {
groupname = "Desktops";
} else {
groupname.sprintf("Desktops-screen-%d", screen_number);
}
KConfigGroup group(m_config, groupname);
group.writeEntry("Number", count());
for (uint i = 1; i <= count(); ++i) {
QString s = name(i);
const QString defaultvalue = defaultName(i);
if (s.isEmpty()) {
s = defaultvalue;
if (m_rootInfo) {
m_rootInfo->setDesktopName(i, s.toUtf8().data());
}
}
if (s != defaultvalue) {
group.writeEntry(QString("Name_%1").arg(i), s);
} else {
QString currentvalue = group.readEntry(QString("Name_%1").arg(i), QString());
if (currentvalue != defaultvalue) {
group.deleteEntry(QString("Name_%1").arg(i));
}
}
}
// Save to disk
group.sync();
}
QString VirtualDesktopManager::defaultName(int desktop) const
{
return i18n("Desktop %1", desktop);
}
void VirtualDesktopManager::setNETDesktopLayout(Qt::Orientation orientation, uint width, uint height, int startingCorner)
{
Q_UNUSED(startingCorner); // Not really worth implementing right now.
// Calculate valid grid size
Q_ASSERT(width > 0 || height > 0);
if ((width <= 0) && (height > 0)) {
width = (m_count + height - 1) / height;
} else if ((height <= 0) && (width > 0)) {
height = (m_count + width - 1) / width;
}
while (width * height < m_count) {
if (orientation == Qt::Horizontal) {
++width;
} else {
++height;
}
}
m_grid.update(QSize(width, height), orientation);
// TODO: why is there no call to m_rootInfo->setDesktopLayout?
emit layoutChanged(width, height);
}
void VirtualDesktopManager::initShortcuts(KActionCollection *keys)
{
KAction *a = keys->addAction("Group:Desktop Switching");
a->setText(i18n("Desktop Switching"));
initSwitchToShortcuts(keys);
addAction(keys, "Switch to Next Desktop", i18n("Switch to Next Desktop"), SLOT(slotNext()));
addAction(keys, "Switch to Previous Desktop", i18n("Switch to Previous Desktop"), SLOT(slotPrevious()));
addAction(keys, "Switch One Desktop to the Right", i18n("Switch One Desktop to the Right"), SLOT(slotRight()));
addAction(keys, "Switch One Desktop to the Left", i18n("Switch One Desktop to the Left"), SLOT(slotLeft()));
addAction(keys, "Switch One Desktop Up", i18n("Switch One Desktop Up"), SLOT(slotUp()));
addAction(keys, "Switch One Desktop Down", i18n("Switch One Desktop Down"), SLOT(slotDown()));
}
void VirtualDesktopManager::initSwitchToShortcuts(KActionCollection *keys)
{
const QString toDesktop = "Switch to Desktop %1";
const KLocalizedString toDesktopLabel = ki18n("Switch to Desktop %1");
addAction(keys, toDesktop, toDesktopLabel, 1, KShortcut(Qt::CTRL + Qt::Key_F1), SLOT(slotSwitchTo()));
addAction(keys, toDesktop, toDesktopLabel, 2, KShortcut(Qt::CTRL + Qt::Key_F2), SLOT(slotSwitchTo()));
addAction(keys, toDesktop, toDesktopLabel, 3, KShortcut(Qt::CTRL + Qt::Key_F3), SLOT(slotSwitchTo()));
addAction(keys, toDesktop, toDesktopLabel, 4, KShortcut(Qt::CTRL + Qt::Key_F4), SLOT(slotSwitchTo()));
for (uint i = 5; i <= maximum(); ++i) {
addAction(keys, toDesktop, toDesktopLabel, i, KShortcut(), SLOT(slotSwitchTo()));
}
}
void VirtualDesktopManager::addAction(KActionCollection *keys, const QString &name, const KLocalizedString &label, uint value, const KShortcut &key, const char *slot)
{
KAction *a = keys->addAction(name.arg(value), this, slot);
a->setText(label.subs(value).toString());
a->setGlobalShortcut(key);
a->setData(value);
}
void VirtualDesktopManager::addAction(KActionCollection *keys, const QString &name, const QString &label, const char *slot)
{
KAction *a = keys->addAction(name, this, slot);
a->setGlobalShortcut(KShortcut());
a->setText(label);
}
void VirtualDesktopManager::slotSwitchTo()
{
QAction *act = qobject_cast<QAction*>(sender());
if (!act) {
return;
}
bool ok = false;
const uint i = act->data().toUInt(&ok);
if (!ok) {
return;
}
setCurrent(i);
}
void VirtualDesktopManager::setNavigationWrappingAround(bool enabled)
{
if (enabled == m_navigationWrapsAround) {
return;
}
m_navigationWrapsAround = enabled;
emit navigationWrappingAroundChanged();
}
void VirtualDesktopManager::slotDown()
{
moveTo<DesktopBelow>(isNavigationWrappingAround());
}
void VirtualDesktopManager::slotLeft()
{
moveTo<DesktopLeft>(isNavigationWrappingAround());
}
void VirtualDesktopManager::slotPrevious()
{
moveTo<DesktopPrevious>(isNavigationWrappingAround());
}
void VirtualDesktopManager::slotNext()
{
moveTo<DesktopNext>(isNavigationWrappingAround());
}
void VirtualDesktopManager::slotRight()
{
moveTo<DesktopRight>(isNavigationWrappingAround());
}
void VirtualDesktopManager::slotUp()
{
moveTo<DesktopAbove>(isNavigationWrappingAround());
}
} // KWin