530 lines
15 KiB
C++
530 lines
15 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2009 Lucas Murray <lmurray@undefinedfire.com>
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Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "virtualdesktops.h"
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#include "input.h"
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// KDE
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#include <KConfigGroup>
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#include <KGlobalAccel>
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#include <KLocalizedString>
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#include <NETWM>
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// Qt
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#include <QAction>
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namespace KWin {
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extern int screen_number;
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VirtualDesktopGrid::VirtualDesktopGrid()
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: m_size(1, 2) // Default to tow rows
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, m_grid(new uint[2])
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{
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// Initializing grid array
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m_grid[0] = 0;
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m_grid[1] = 0;
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}
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VirtualDesktopGrid::~VirtualDesktopGrid()
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{
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delete[] m_grid;
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}
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void VirtualDesktopGrid::update(const QSize &size, Qt::Orientation orientation)
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{
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// Set private variables
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delete[] m_grid;
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m_size = size;
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const uint width = size.width();
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const uint height = size.height();
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const uint length = width * height;
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const uint desktopCount = VirtualDesktopManager::self()->count();
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m_grid = new uint[length];
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// Populate grid
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uint desktop = 1;
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if (orientation == Qt::Horizontal) {
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for (uint y = 0; y < height; ++y) {
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for (uint x = 0; x < width; ++x) {
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m_grid[y * width + x] = (desktop <= desktopCount ? desktop++ : 0);
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}
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}
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} else {
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for (uint x = 0; x < width; ++x) {
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for (uint y = 0; y < height; ++y) {
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m_grid[y * width + x] = (desktop <= desktopCount ? desktop++ : 0);
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}
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}
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}
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}
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QPoint VirtualDesktopGrid::gridCoords(uint id) const
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{
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for (int y = 0; y < m_size.height(); ++y) {
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for (int x = 0; x < m_size.width(); ++x) {
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if (m_grid[y * m_size.width() + x] == id) {
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return QPoint(x, y);
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}
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}
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}
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return QPoint(-1, -1);
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}
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KWIN_SINGLETON_FACTORY_VARIABLE(VirtualDesktopManager, s_manager)
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VirtualDesktopManager::VirtualDesktopManager(QObject *parent)
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: QObject(parent)
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, m_current(0)
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, m_count(0)
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, m_navigationWrapsAround(false)
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, m_rootInfo(NULL)
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{
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}
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VirtualDesktopManager::~VirtualDesktopManager()
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{
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s_manager = NULL;
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}
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QString VirtualDesktopManager::name(uint desktop) const
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{
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if (!m_rootInfo) {
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return defaultName(desktop);
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}
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return QString::fromUtf8(m_rootInfo->desktopName(desktop));
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}
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uint VirtualDesktopManager::above(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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QPoint coords = m_grid.gridCoords(id);
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Q_ASSERT(coords.x() >= 0);
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while (true) {
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coords.ry()--;
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if (coords.y() < 0) {
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if (wrap) {
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coords.setY(m_grid.height() - 1);
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} else {
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return id; // Already at the top-most desktop
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}
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}
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const uint desktop = m_grid.at(coords);
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if (desktop > 0) {
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return desktop;
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}
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}
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}
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uint VirtualDesktopManager::toRight(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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QPoint coords = m_grid.gridCoords(id);
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Q_ASSERT(coords.x() >= 0);
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while (true) {
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coords.rx()++;
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if (coords.x() >= m_grid.width()) {
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if (wrap) {
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coords.setX(0);
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} else {
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return id; // Already at the right-most desktop
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}
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}
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const uint desktop = m_grid.at(coords);
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if (desktop > 0) {
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return desktop;
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}
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}
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}
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uint VirtualDesktopManager::below(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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QPoint coords = m_grid.gridCoords(id);
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Q_ASSERT(coords.x() >= 0);
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while (true) {
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coords.ry()++;
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if (coords.y() >= m_grid.height()) {
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if (wrap) {
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coords.setY(0);
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} else {
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// Already at the bottom-most desktop
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return id;
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}
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}
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const uint desktop = m_grid.at(coords);
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if (desktop > 0) {
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return desktop;
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}
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}
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}
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uint VirtualDesktopManager::toLeft(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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QPoint coords = m_grid.gridCoords(id);
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Q_ASSERT(coords.x() >= 0);
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while (true) {
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coords.rx()--;
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if (coords.x() < 0) {
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if (wrap) {
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coords.setX(m_grid.width() - 1);
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} else {
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return id; // Already at the left-most desktop
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}
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}
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const uint desktop = m_grid.at(coords);
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if (desktop > 0) {
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return desktop;
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}
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}
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}
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uint VirtualDesktopManager::next(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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const uint desktop = id + 1;
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if (desktop > count()) {
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if (wrap) {
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return 1;
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} else {
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// are at the last desktop, without wrap return current
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return id;
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}
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}
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return desktop;
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}
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uint VirtualDesktopManager::previous(uint id, bool wrap) const
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{
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if (id == 0) {
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id = current();
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}
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const uint desktop = id - 1;
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if (desktop == 0) {
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if (wrap) {
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return count();
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} else {
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// are at the first desktop, without wrap return current
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return id;
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}
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}
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return desktop;
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}
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bool VirtualDesktopManager::setCurrent(uint newDesktop)
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{
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if (newDesktop < 1 || newDesktop > count() || newDesktop == m_current) {
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return false;
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}
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const uint oldDesktop = m_current;
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// change the desktop
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m_current = newDesktop;
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emit currentChanged(oldDesktop, newDesktop);
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return true;
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}
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void VirtualDesktopManager::setCount(uint count)
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{
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count = qBound<uint>(1, count, VirtualDesktopManager::maximum());
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if (count == m_count) {
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// nothing to change
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return;
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}
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const uint oldCount = m_count;
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m_count = count;
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if (oldCount > m_count) {
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handleDesktopsRemoved(oldCount);
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}
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updateRootInfo();
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save();
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emit countChanged(oldCount, m_count);
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}
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void VirtualDesktopManager::handleDesktopsRemoved(uint previousCount)
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{
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if (current() > count()) {
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setCurrent(count());
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}
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emit desktopsRemoved(previousCount);
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}
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void VirtualDesktopManager::updateRootInfo()
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{
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if (!m_rootInfo) {
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// Make sure the layout is still valid
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updateLayout();
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return;
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}
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const int n = count();
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m_rootInfo->setNumberOfDesktops(n);
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NETPoint *viewports = new NETPoint[n];
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m_rootInfo->setDesktopViewport(n, *viewports);
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delete[] viewports;
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// Make sure the layout is still valid
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updateLayout();
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}
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void VirtualDesktopManager::updateLayout()
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{
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int width = 0;
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int height = 0;
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Qt::Orientation orientation = Qt::Horizontal;
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if (m_rootInfo) {
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// TODO: Is there a sane way to avoid overriding the existing grid?
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width = m_rootInfo->desktopLayoutColumnsRows().width();
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height = m_rootInfo->desktopLayoutColumnsRows().height();
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orientation = m_rootInfo->desktopLayoutOrientation() == NET::OrientationHorizontal ? Qt::Horizontal : Qt::Vertical;
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}
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if (width == 0 && height == 0) {
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// Not given, set default layout
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height = 2;
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}
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setNETDesktopLayout(orientation,
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width, height, 0 //rootInfo->desktopLayoutCorner() // Not really worth implementing right now.
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);
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}
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static bool s_loadingDesktopSettings = false;
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void VirtualDesktopManager::load()
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{
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s_loadingDesktopSettings = true;
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if (!m_config) {
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return;
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}
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QString groupname;
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if (screen_number == 0) {
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groupname = QStringLiteral("Desktops");
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} else {
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groupname.sprintf("Desktops-screen-%d", screen_number);
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}
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KConfigGroup group(m_config, groupname);
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const int n = group.readEntry("Number", 1);
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setCount(n);
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if (m_rootInfo) {
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for (int i = 1; i <= n; i++) {
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QString s = group.readEntry(QStringLiteral("Name_%1").arg(i), i18n("Desktop %1", i));
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m_rootInfo->setDesktopName(i, s.toUtf8().data());
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// TODO: update desktop focus chain, why?
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// m_desktopFocusChain.value()[i-1] = i;
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}
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int rows = group.readEntry<int>("Rows", 2);
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rows = qBound(1, rows, n);
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// avoid weird cases like having 3 rows for 4 desktops, where the last row is unused
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int columns = n / rows;
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if (n % rows > 0) {
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columns++;
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}
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m_rootInfo->setDesktopLayout(NET::OrientationHorizontal, columns, rows, NET::DesktopLayoutCornerTopLeft);
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m_rootInfo->activate();
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}
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s_loadingDesktopSettings = false;
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}
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void VirtualDesktopManager::save()
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{
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if (s_loadingDesktopSettings) {
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return;
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}
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if (!m_config) {
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return;
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}
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QString groupname;
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if (screen_number == 0) {
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groupname = QStringLiteral("Desktops");
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} else {
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groupname.sprintf("Desktops-screen-%d", screen_number);
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}
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KConfigGroup group(m_config, groupname);
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group.writeEntry("Number", count());
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for (uint i = 1; i <= count(); ++i) {
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QString s = name(i);
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const QString defaultvalue = defaultName(i);
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if (s.isEmpty()) {
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s = defaultvalue;
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if (m_rootInfo) {
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m_rootInfo->setDesktopName(i, s.toUtf8().data());
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}
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}
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if (s != defaultvalue) {
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group.writeEntry(QStringLiteral("Name_%1").arg(i), s);
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} else {
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QString currentvalue = group.readEntry(QStringLiteral("Name_%1").arg(i), QString());
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if (currentvalue != defaultvalue) {
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group.deleteEntry(QStringLiteral("Name_%1").arg(i));
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}
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}
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}
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// Save to disk
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group.sync();
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}
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QString VirtualDesktopManager::defaultName(int desktop) const
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{
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return i18n("Desktop %1", desktop);
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}
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void VirtualDesktopManager::setNETDesktopLayout(Qt::Orientation orientation, uint width, uint height, int startingCorner)
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{
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Q_UNUSED(startingCorner); // Not really worth implementing right now.
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// Calculate valid grid size
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Q_ASSERT(width > 0 || height > 0);
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if ((width <= 0) && (height > 0)) {
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width = (m_count + height - 1) / height;
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} else if ((height <= 0) && (width > 0)) {
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height = (m_count + width - 1) / width;
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}
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while (width * height < m_count) {
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if (orientation == Qt::Horizontal) {
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++width;
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} else {
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++height;
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}
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}
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m_grid.update(QSize(width, height), orientation);
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// TODO: why is there no call to m_rootInfo->setDesktopLayout?
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emit layoutChanged(width, height);
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}
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void VirtualDesktopManager::initShortcuts()
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{
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initSwitchToShortcuts();
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addAction(QStringLiteral("Switch to Next Desktop"), i18n("Switch to Next Desktop"), &VirtualDesktopManager::slotNext);
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addAction(QStringLiteral("Switch to Previous Desktop"), i18n("Switch to Previous Desktop"), &VirtualDesktopManager::slotPrevious);
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addAction(QStringLiteral("Switch One Desktop to the Right"), i18n("Switch One Desktop to the Right"), &VirtualDesktopManager::slotRight);
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addAction(QStringLiteral("Switch One Desktop to the Left"), i18n("Switch One Desktop to the Left"), &VirtualDesktopManager::slotLeft);
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addAction(QStringLiteral("Switch One Desktop Up"), i18n("Switch One Desktop Up"), &VirtualDesktopManager::slotUp);
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addAction(QStringLiteral("Switch One Desktop Down"), i18n("Switch One Desktop Down"), &VirtualDesktopManager::slotDown);
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// axis events
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input()->registerAxisShortcut(Qt::ControlModifier | Qt::AltModifier, PointerAxisDown,
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findChild<QAction*>(QStringLiteral("Switch to Next Desktop")));
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input()->registerAxisShortcut(Qt::ControlModifier | Qt::AltModifier, PointerAxisUp,
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findChild<QAction*>(QStringLiteral("Switch to Previous Desktop")));
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}
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void VirtualDesktopManager::initSwitchToShortcuts()
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{
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const QString toDesktop = QStringLiteral("Switch to Desktop %1");
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const KLocalizedString toDesktopLabel = ki18n("Switch to Desktop %1");
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addAction(toDesktop, toDesktopLabel, 1, QKeySequence(Qt::CTRL + Qt::Key_F1), &VirtualDesktopManager::slotSwitchTo);
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addAction(toDesktop, toDesktopLabel, 2, QKeySequence(Qt::CTRL + Qt::Key_F2), &VirtualDesktopManager::slotSwitchTo);
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addAction(toDesktop, toDesktopLabel, 3, QKeySequence(Qt::CTRL + Qt::Key_F3), &VirtualDesktopManager::slotSwitchTo);
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addAction(toDesktop, toDesktopLabel, 4, QKeySequence(Qt::CTRL + Qt::Key_F4), &VirtualDesktopManager::slotSwitchTo);
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for (uint i = 5; i <= maximum(); ++i) {
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addAction(toDesktop, toDesktopLabel, i, QKeySequence(), &VirtualDesktopManager::slotSwitchTo);
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}
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}
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void VirtualDesktopManager::addAction(const QString &name, const KLocalizedString &label, uint value, const QKeySequence &key, void (VirtualDesktopManager::*slot)())
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{
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QAction *a = new QAction(this);
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a->setObjectName(name.arg(value));
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a->setText(label.subs(value).toString());
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a->setData(value);
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connect(a, &QAction::triggered, this, slot);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << key);
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input()->registerShortcut(key, a);
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}
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void VirtualDesktopManager::addAction(const QString &name, const QString &label, void (VirtualDesktopManager::*slot)())
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{
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QAction *a = new QAction(this);
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a->setObjectName(name);
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a->setText(label);
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connect(a, &QAction::triggered, this, slot);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>());
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input()->registerShortcut(QKeySequence(), a);
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}
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void VirtualDesktopManager::slotSwitchTo()
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{
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QAction *act = qobject_cast<QAction*>(sender());
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if (!act) {
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return;
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}
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bool ok = false;
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const uint i = act->data().toUInt(&ok);
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if (!ok) {
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return;
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}
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setCurrent(i);
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}
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void VirtualDesktopManager::setNavigationWrappingAround(bool enabled)
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{
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if (enabled == m_navigationWrapsAround) {
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return;
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}
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m_navigationWrapsAround = enabled;
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emit navigationWrappingAroundChanged();
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}
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void VirtualDesktopManager::slotDown()
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{
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moveTo<DesktopBelow>(isNavigationWrappingAround());
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}
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void VirtualDesktopManager::slotLeft()
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{
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moveTo<DesktopLeft>(isNavigationWrappingAround());
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}
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void VirtualDesktopManager::slotPrevious()
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{
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moveTo<DesktopPrevious>(isNavigationWrappingAround());
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}
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void VirtualDesktopManager::slotNext()
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{
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moveTo<DesktopNext>(isNavigationWrappingAround());
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}
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void VirtualDesktopManager::slotRight()
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{
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moveTo<DesktopRight>(isNavigationWrappingAround());
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}
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void VirtualDesktopManager::slotUp()
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{
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moveTo<DesktopAbove>(isNavigationWrappingAround());
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}
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} // KWin
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