456 lines
17 KiB
C++
456 lines
17 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) 2011 Arthur Arlt <a.arlt@stud.uni-heidelberg.de>
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Since the functionality provided in this class has been moved from
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class Workspace, it is not clear who exactly has written the code.
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The list below contains the copyright holders of the class Workspace.
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Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
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Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2009 Lucas Murray <lmurray@undefinedfire.com>
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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 "screenedge.h"
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// KWin
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#include "atoms.h"
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#include "client.h"
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#include "effects.h"
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#include "options.h"
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#include "utils.h"
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#include "workspace.h"
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// Qt
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#include <QtCore/QTimer>
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#include <QtCore/QVector>
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#include <QtCore/QTextStream>
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#include <QtDBus/QDBusInterface>
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namespace KWin {
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ScreenEdge::ScreenEdge()
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: QObject(NULL)
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, m_screenEdgeWindows(ELECTRIC_COUNT, None)
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, m_screenEdgeReserved(ELECTRIC_COUNT, 0)
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{
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}
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ScreenEdge::~ScreenEdge()
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{
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}
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void ScreenEdge::init()
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{
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reserveActions(true);
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update();
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}
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void ScreenEdge::update(bool force)
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{
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m_screenEdgeTimeFirst = xTime();
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m_screenEdgeTimeLast = xTime();
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m_screenEdgeTimeLastTrigger = xTime();
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m_currentScreenEdge = ElectricNone;
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QRect r = QRect(0, 0, displayWidth(), displayHeight());
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m_screenEdgeTop = r.top();
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m_screenEdgeBottom = r.bottom();
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m_screenEdgeLeft = r.left();
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m_screenEdgeRight = r.right();
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for (int pos = 0; pos < ELECTRIC_COUNT; ++pos) {
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if (force || m_screenEdgeReserved[pos] == 0) {
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if (m_screenEdgeWindows[pos] != None)
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XDestroyWindow(display(), m_screenEdgeWindows[pos]);
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m_screenEdgeWindows[pos] = None;
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}
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if (m_screenEdgeReserved[pos] == 0) {
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continue;
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}
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if (m_screenEdgeWindows[pos] != None)
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continue;
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XSetWindowAttributes attributes;
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attributes.override_redirect = True;
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attributes.event_mask = EnterWindowMask | LeaveWindowMask;
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unsigned long valuemask = CWOverrideRedirect | CWEventMask;
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int xywh[ELECTRIC_COUNT][4] = {
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{ r.left() + 1, r.top(), r.width() - 2, 1 }, // Top
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{ r.right(), r.top(), 1, 1 }, // Top-right
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{ r.right(), r.top() + 1, 1, r.height() - 2 }, // Etc.
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{ r.right(), r.bottom(), 1, 1 },
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{ r.left() + 1, r.bottom(), r.width() - 2, 1 },
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{ r.left(), r.bottom(), 1, 1 },
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{ r.left(), r.top() + 1, 1, r.height() - 2 },
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{ r.left(), r.top(), 1, 1 }
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};
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m_screenEdgeWindows[pos] = XCreateWindow(display(), rootWindow(),
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xywh[pos][0], xywh[pos][1], xywh[pos][2], xywh[pos][3],
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0, CopyFromParent, InputOnly, CopyFromParent, valuemask, &attributes);
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XMapWindow(display(), m_screenEdgeWindows[pos]);
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// Set XdndAware on the windows, so that DND enter events are received (#86998)
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Atom version = 4; // XDND version
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XChangeProperty(display(), m_screenEdgeWindows[pos], atoms->xdnd_aware, XA_ATOM,
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32, PropModeReplace, (unsigned char*)(&version), 1);
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}
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}
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void ScreenEdge::restoreSize(ElectricBorder border)
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{
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if (m_screenEdgeWindows[border] == None)
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return;
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QRect r(0, 0, displayWidth(), displayHeight());
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int xywh[ELECTRIC_COUNT][4] = {
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{ r.left() + 1, r.top(), r.width() - 2, 1 }, // Top
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{ r.right(), r.top(), 1, 1 }, // Top-right
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{ r.right(), r.top() + 1, 1, r.height() - 2 }, // Etc.
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{ r.right(), r.bottom(), 1, 1 },
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{ r.left() + 1, r.bottom(), r.width() - 2, 1 },
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{ r.left(), r.bottom(), 1, 1 },
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{ r.left(), r.top() + 1, 1, r.height() - 2 },
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{ r.left(), r.top(), 1, 1 }
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};
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XMoveResizeWindow(display(), m_screenEdgeWindows[border],
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xywh[border][0], xywh[border][1], xywh[border][2], xywh[border][3]);
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}
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void ScreenEdge::reserveActions(bool isToReserve)
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{
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for (int pos = 0; pos < ELECTRIC_COUNT; ++pos)
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if (options->electricBorderAction(static_cast<ElectricBorder>(pos))) {
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if (isToReserve)
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reserve(static_cast<ElectricBorder>(pos));
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else
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unreserve(static_cast<ElectricBorder>(pos));
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}
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}
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void ScreenEdge::reserveDesktopSwitching(bool isToReserve, Qt::Orientations o)
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{
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if (!o)
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return;
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if (isToReserve) {
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reserve(ElectricTopLeft);
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reserve(ElectricTopRight);
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reserve(ElectricBottomRight);
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reserve(ElectricBottomLeft);
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if (o & Qt::Horizontal) {
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reserve(ElectricLeft);
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reserve(ElectricRight);
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}
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if (o & Qt::Vertical) {
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reserve(ElectricTop);
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reserve(ElectricBottom);
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}
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} else {
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unreserve(ElectricTopLeft);
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unreserve(ElectricTopRight);
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unreserve(ElectricBottomRight);
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unreserve(ElectricBottomLeft);
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if (o & Qt::Horizontal) {
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unreserve(ElectricLeft);
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unreserve(ElectricRight);
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}
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if (o & Qt::Vertical) {
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unreserve(ElectricTop);
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unreserve(ElectricBottom);
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}
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}
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}
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void ScreenEdge::reserve(ElectricBorder border)
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{
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if (border == ElectricNone)
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return;
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if (m_screenEdgeReserved[border]++ == 0)
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QTimer::singleShot(0, this, SLOT(update()));
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}
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void ScreenEdge::unreserve(ElectricBorder border)
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{
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if (border == ElectricNone)
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return;
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assert(m_screenEdgeReserved[border] > 0);
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if (--m_screenEdgeReserved[border] == 0)
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QTimer::singleShot(0, this, SLOT(update()));
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}
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void ScreenEdge::check(const QPoint& pos, Time now, bool forceNoPushback)
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{
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if ((pos.x() != m_screenEdgeLeft) &&
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(pos.x() != m_screenEdgeRight) &&
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(pos.y() != m_screenEdgeTop) &&
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(pos.y() != m_screenEdgeBottom))
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return;
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bool have_borders = false;
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for (int i = 0; i < ELECTRIC_COUNT; ++i)
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if (m_screenEdgeWindows[i] != None)
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have_borders = true;
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if (!have_borders)
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return;
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Time treshold_set = options->electricBorderDelay(); // Set timeout
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Time treshold_reset = 250; // Reset timeout
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Time treshold_trigger = options->electricBorderCooldown(); // Minimum time between triggers
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int distance_reset = 30; // Mouse should not move more than this many pixels
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int pushback_pixels = forceNoPushback ? 0 : options->electricBorderPushbackPixels();
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ElectricBorder border;
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if (pos.x() == m_screenEdgeLeft && pos.y() == m_screenEdgeTop)
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border = ElectricTopLeft;
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else if (pos.x() == m_screenEdgeRight && pos.y() == m_screenEdgeTop)
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border = ElectricTopRight;
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else if (pos.x() == m_screenEdgeLeft && pos.y() == m_screenEdgeBottom)
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border = ElectricBottomLeft;
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else if (pos.x() == m_screenEdgeRight && pos.y() == m_screenEdgeBottom)
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border = ElectricBottomRight;
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else if (pos.x() == m_screenEdgeLeft)
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border = ElectricLeft;
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else if (pos.x() == m_screenEdgeRight)
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border = ElectricRight;
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else if (pos.y() == m_screenEdgeTop)
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border = ElectricTop;
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else if (pos.y() == m_screenEdgeBottom)
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border = ElectricBottom;
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else
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abort();
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if (m_screenEdgeWindows[border] == None)
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return;
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if (pushback_pixels == 0) {
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// no pushback so we have to activate at once
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m_screenEdgeTimeLast = now;
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m_currentScreenEdge = border;
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m_screenEdgePushPoint = pos;
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}
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if ((m_currentScreenEdge == border) &&
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(timestampDiff(m_screenEdgeTimeLast, now) < treshold_reset) &&
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(timestampDiff(m_screenEdgeTimeLastTrigger, now) > treshold_trigger) &&
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((pos - m_screenEdgePushPoint).manhattanLength() < distance_reset)) {
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m_screenEdgeTimeLast = now;
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if (timestampDiff(m_screenEdgeTimeFirst, now) > treshold_set) {
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m_currentScreenEdge = ElectricNone;
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m_screenEdgeTimeLastTrigger = now;
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if (Workspace::self()->getMovingClient()) {
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// If moving a client or have force doing the desktop switch
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if (options->electricBorders() != Options::ElectricDisabled)
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switchDesktop(border, pos);
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return; // Don't reset cursor position
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} else {
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if (options->electricBorders() == Options::ElectricAlways &&
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(border == ElectricTop || border == ElectricRight ||
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border == ElectricBottom || border == ElectricLeft)) {
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// If desktop switching is always enabled don't apply it to the corners if
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// an effect is applied to it (We will check that later).
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switchDesktop(border, pos);
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return; // Don't reset cursor position
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}
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switch(options->electricBorderAction(border)) {
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case ElectricActionDashboard: { // Display Plasma dashboard
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QDBusInterface plasmaApp("org.kde.plasma-desktop", "/App");
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plasmaApp.call("toggleDashboard");
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}
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break;
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case ElectricActionShowDesktop: {
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Workspace::self()->setShowingDesktop(!Workspace::self()->showingDesktop());
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break;
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}
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case ElectricActionLockScreen: { // Lock the screen
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QDBusInterface screenSaver("org.kde.screensaver", "/ScreenSaver");
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screenSaver.call("Lock");
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}
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break;
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case ElectricActionPreventScreenLocking: {
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break;
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}
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case ElectricActionNone: // Either desktop switching or an effect
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default: {
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if (effects && static_cast<EffectsHandlerImpl*>(effects)->borderActivated(border))
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{} // Handled by effects
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else {
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if (options->electricBorders() == Options::ElectricAlways) {
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switchDesktop(border, pos);
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return; // Don't reset cursor position
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}
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emit activated(border);
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}
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}
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}
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}
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}
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} else {
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m_currentScreenEdge = border;
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m_screenEdgeTimeFirst = now;
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m_screenEdgeTimeLast = now;
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m_screenEdgePushPoint = pos;
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}
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// Reset the pointer to find out whether the user is really pushing
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// (the direction back from which it came, starting from top clockwise)
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const int xdiff[ELECTRIC_COUNT] = { 0,
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-pushback_pixels,
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-pushback_pixels,
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-pushback_pixels,
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0,
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pushback_pixels,
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pushback_pixels,
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pushback_pixels
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};
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const int ydiff[ELECTRIC_COUNT] = { pushback_pixels,
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pushback_pixels,
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0,
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-pushback_pixels,
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-pushback_pixels,
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-pushback_pixels,
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0,
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pushback_pixels
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};
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QCursor::setPos(pos.x() + xdiff[border], pos.y() + ydiff[border]);
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}
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void ScreenEdge::switchDesktop(ElectricBorder border, const QPoint& _pos)
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{
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QPoint pos = _pos;
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int desk = Workspace::self()->currentDesktop();
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const int OFFSET = 2;
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if (border == ElectricLeft || border == ElectricTopLeft || border == ElectricBottomLeft) {
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desk = Workspace::self()->desktopToLeft(desk, options->isRollOverDesktops());
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pos.setX(displayWidth() - 1 - OFFSET);
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}
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if (border == ElectricRight || border == ElectricTopRight || border == ElectricBottomRight) {
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desk = Workspace::self()->desktopToRight(desk, options->isRollOverDesktops());
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pos.setX(OFFSET);
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}
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if (border == ElectricTop || border == ElectricTopLeft || border == ElectricTopRight) {
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desk = Workspace::self()->desktopAbove(desk, options->isRollOverDesktops());
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pos.setY(displayHeight() - 1 - OFFSET);
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}
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if (border == ElectricBottom || border == ElectricBottomLeft || border == ElectricBottomRight) {
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desk = Workspace::self()->desktopBelow(desk, options->isRollOverDesktops());
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pos.setY(OFFSET);
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}
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Client *c = Workspace::self()->getMovingClient();
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if (c && c->rules()->checkDesktop(desk) != desk)
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return; // user attempts to move a client to another desktop where it is ruleforced to not be
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int desk_before = Workspace::self()->currentDesktop();
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Workspace::self()->setCurrentDesktop(desk);
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if (Workspace::self()->currentDesktop() != desk_before)
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QCursor::setPos(pos);
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}
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bool ScreenEdge::isEntered(XEvent* e)
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{
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if (e->type == EnterNotify) {
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for (int i = 0; i < ELECTRIC_COUNT; ++i)
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if (m_screenEdgeWindows[i] != None && e->xcrossing.window == m_screenEdgeWindows[i]) {
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// The user entered an electric border
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check(QPoint(e->xcrossing.x_root, e->xcrossing.y_root), e->xcrossing.time);
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return true;
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}
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}
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if (e->type == ClientMessage) {
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if (e->xclient.message_type == atoms->xdnd_position) {
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for (int i = 0; i < ELECTRIC_COUNT; ++i)
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if (m_screenEdgeWindows[i] != None && e->xclient.window == m_screenEdgeWindows[i]) {
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updateXTime();
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check(QPoint(e->xclient.data.l[2] >> 16, e->xclient.data.l[2] & 0xffff), xTime(), true);
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return true;
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}
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}
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}
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return false;
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}
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void ScreenEdge::ensureOnTop()
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{
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Window* windows = new Window[ 8 ]; // There are up to 8 borders
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int pos = 0;
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for (int i = 0; i < ELECTRIC_COUNT; ++i)
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if (m_screenEdgeWindows[ i ] != None)
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windows[ pos++ ] = m_screenEdgeWindows[ i ];
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if (!pos) {
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delete [] windows;
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return; // No borders at all
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}
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XRaiseWindow(display(), windows[ 0 ]);
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XRestackWindows(display(), windows, pos);
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delete [] windows;
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}
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/*
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* NOTICE THIS IS A HACK
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* or at least a quite cumbersome way to handle conflictive electric borders
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* (like for autohiding panels or whatever)
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* the SANE solution is a central electric border daemon and a protocol
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* what this function does is to search for windows on the screen edges that are
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* * not our own screenedge
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* * either very slim
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* * or InputOnly
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* and raises them on top of everything else, including our own screen borders
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* this is typically (and for now ONLY) called when an effect input window is destroyed
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* (which raised our electric borders)
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*/
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void ScreenEdge::raisePanelProxies()
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{
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XWindowAttributes attr;
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Window dummy;
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Window* windows = NULL;
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unsigned int count = 0;
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QRect screen = QRect(0, 0, displayWidth(), displayHeight());
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QVector<Window> proxies;
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XQueryTree(display(), rootWindow(), &dummy, &dummy, &windows, &count);
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for (unsigned int i = 0; i < count; ++i) {
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if (m_screenEdgeWindows.contains(windows[i]))
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continue;
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if (XGetWindowAttributes(display(), windows[i], &attr)) {
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if (attr.map_state == IsUnmapped) // a thousand Qt group leader dummies ...
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continue;
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const QRect geo(attr.x, attr.y, attr.width, attr.height);
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if (geo.width() < 1 || geo.height() < 1)
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continue;
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if (!(geo.width() > 1 || geo.height() > 1))
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continue; // random 1x1 dummy windows, all your corners are belong to us >-)
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if (attr.c_class != InputOnly && (geo.width() > 3 && geo.height() > 3))
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continue;
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if (geo.x() != screen.x() && geo.right() != screen.right() &&
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geo.y() != screen.y() && geo.bottom() != screen.bottom())
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continue;
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proxies << windows[i];
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}
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}
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if (!proxies.isEmpty()) {
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XRaiseWindow(display(), proxies.data()[ 0 ]);
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XRestackWindows(display(), proxies.data(), proxies.count());
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}
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if (windows)
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XFree(windows);
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}
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const QVector< Window >& ScreenEdge::windows()
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{
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return m_screenEdgeWindows;
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}
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} //namespace
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