File indexing completed on 2022-08-04 15:34:52

 /**
  * Copyright (C) 2002 Daniel Molkentin <molkentin@kde.org>
  * Copyright (C) 2002-2004 Scott Wheeler <wheeler@kde.org>
  * Copyright (C) 2004-2009 Michael Pyne <mpyne@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 "systemtray.h"
 
 #include <kiconloader.h>
 #include <kactioncollection.h>
 #include <kactionmenu.h>
 #include <kwindowsystem.h>
 #include <KLocalizedString>
 
 #include <QAction>
 #include <QMenu>
 #include <QTimer>
 #include <QWheelEvent>
 #include <QColor>
 #include <QPushButton>
 #include <QPalette>
 #include <QPixmap>
 #include <QLabel>
 #include <QIcon>
 #include <QApplication>
 
 #include "actioncollection.h"
 #include "coverinfo.h"
 #include "iconsupport.h"
 #include "juk_debug.h"
 #include "juktag.h"
 #include "playermanager.h"
 
 using namespace IconSupport; // ""_icon
 
 PassiveInfo::PassiveInfo()
   : QFrame(nullptr, Qt::ToolTip | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint)
   , m_startFadeTimer(new QTimer(this))
   , m_layout(new QVBoxLayout(this))
   , m_justDie(false)
 {
     connect(m_startFadeTimer, &QTimer::timeout, this, &PassiveInfo::timerExpired);
     m_startFadeTimer->setSingleShot(true);
 
     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
 
     // Workaround transparent background in Oxygen when (ab-)using Qt::ToolTip
     setAutoFillBackground(true);
 
     setFrameStyle(StyledPanel | Plain);
     setLineWidth(2);
 }
 
 void PassiveInfo::show()
 {
     m_startFadeTimer->start(3500);
     setWindowOpacity(1.0);
     QFrame::show();
 }
 
 void PassiveInfo::setView(QWidget *view)
 {
     m_layout->addWidget(view);
     view->show(); // We are still hidden though.
     adjustSize();
     positionSelf();
 }
 
 void PassiveInfo::timerExpired()
 {
     // If m_justDie is set, we should just go, otherwise we should emit the
     // signal and wait for the system tray to delete us.
     if(m_justDie)
         hide();
     else
         emit timeExpired();
 }
 
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void PassiveInfo::enterEvent (QEnterEvent *)
 #else
 void PassiveInfo::enterEvent (QEvent *)
 #endif
 {
     m_startFadeTimer->stop();
     emit mouseEntered();
 }
 
 void PassiveInfo::leaveEvent(QEvent *)
 {
     m_justDie = true;
     m_startFadeTimer->start(50);
 }
 
 void PassiveInfo::wheelEvent(QWheelEvent *e)
 {
     if(e->angleDelta().y() >= 0) {
         emit nextSong();
     }
     else {
         emit previousSong();
     }
 
     e->accept();
 }
 
 void PassiveInfo::positionSelf()
 {
     // Start with a QRect of our size, move it to the right spot.
     QRect r(rect());
     QRect curScreen(KWindowSystem::workArea());
 
     // Try to position in lower right of the screen
     QPoint anchor(curScreen.right() * 7 / 8, curScreen.bottom());
 
     // Now make our rect hit that anchor.
     r.moveBottomRight(anchor);
 
     move(r.topLeft());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // public methods
 ////////////////////////////////////////////////////////////////////////////////
 
 SystemTray::SystemTray(PlayerManager *player, QWidget *parent)
   : KStatusNotifierItem(parent)
   , m_player(player)
 {
     using ActionCollection::action; // Override the KSNI::action call introduced in KF5
 
     // This should be initialized to the number of labels that are used.
     m_labels.fill(nullptr, 3);
 
     setIconByName("juk");
     setCategory(ApplicationStatus);
     setStatus(Active); // We were told to dock in systray by user, force us visible
 
     m_forwardPix = "media-skip-forward"_icon;
     m_backPix = "media-skip-backward"_icon;
 
     // Just create this here so that it show up in the DBus interface and the
     // key bindings dialog.
 
     QAction *rpaction = new QAction(i18n("Redisplay Popup"), this);
     ActionCollection::actions()->addAction("showPopup", rpaction);
     connect(rpaction, &QAction::triggered, this, &SystemTray::slotPlay);
 
     QMenu *cm = contextMenu();
 
     connect(m_player, &PlayerManager::signalPlay,
             this, &SystemTray::slotPlay);
     connect(m_player, &PlayerManager::signalPause,
             this, &SystemTray::slotPause);
     connect(m_player, &PlayerManager::signalStop,
             this, &SystemTray::slotStop);
 
     cm->addAction(action("play"));
     cm->addAction(action("pause"));
     cm->addAction(action("stop"));
     cm->addAction(action("forward"));
     cm->addAction(action("back"));
 
     cm->addSeparator();
 
     // Pity the actionCollection doesn't keep track of what sub-menus it has.
 
     KActionMenu *menu = new KActionMenu(i18n("&Random Play"), this);
 
     menu->addAction(action("disableRandomPlay"));
     menu->addAction(action("randomPlay"));
     menu->addAction(action("albumRandomPlay"));
     cm->addAction(menu);
 
     cm->addAction(action("togglePopups"));
 
     m_fadeStepTimer = new QTimer(this);
     m_fadeStepTimer->setObjectName(QLatin1String("systrayFadeTimer"));
 
     // Handle wheel events
     connect(this, &KStatusNotifierItem::scrollRequested,
             this, &SystemTray::scrollEvent);
 
     // Add a quick hook for play/pause toggle
     connect(this, &KStatusNotifierItem::secondaryActivateRequested,
             action("playPause"), &QAction::trigger);
 
     if(m_player->playing())
         slotPlay();
     else if(m_player->paused())
         slotPause();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // public slots
 ////////////////////////////////////////////////////////////////////////////////
 
 void SystemTray::slotPlay()
 {
     if(!m_player->playing())
         return;
 
     QPixmap cover = m_player->playingFile().coverInfo()->pixmap(CoverInfo::FullSize);
 
     setOverlayIconByName("media-playback-start");
     setToolTip(m_player->playingString(), cover);
     createPopup();
 }
 
 void SystemTray::slotPause()
 {
     setOverlayIconByName("media-playback-pause");
 }
 
 void SystemTray::slotPopupLargeCover()
 {
     if(!m_player->playing())
         return;
 
     const FileHandle playingFile = m_player->playingFile();
     playingFile.coverInfo()->popup();
 }
 
 void SystemTray::slotStop()
 {
     setToolTip();
     setOverlayIconByName(QString());
 
     delete m_popup;
     m_popup = nullptr;
     m_fadeStepTimer->stop();
 }
 
 void SystemTray::slotPopupDestroyed()
 {
     m_labels.fill(nullptr);
 }
 
 void SystemTray::slotNextStep()
 {
     ++m_step;
 
     // If we're not fading, immediately stop the fadeout
     if(!m_fade || m_step == STEPS) {
         m_step = 0;
         m_fadeStepTimer->stop();
         emit fadeDone();
         return;
     }
 
     if(m_hasCompositionManager) {
         m_popup->setWindowOpacity((1.0 * STEPS - m_step) / STEPS);
     }
     else {
         const QColor result = interpolateColor(m_step);
 
         for(auto &label : m_labels) {
             QPalette palette(label->palette());
             palette.setColor(label->foregroundRole(), result);
             label->setPalette(palette);
         }
     }
 }
 
 void SystemTray::slotFadeOut()
 {
     m_startColor = m_labels[0]->palette().color(QPalette::Text); //textColor();
     m_endColor = m_labels[0]->palette().color(QPalette::Window); //backgroundColor();
 
     m_hasCompositionManager = KWindowSystem::compositingActive();
 
     connect(this, &SystemTray::fadeDone,
             m_popup, &QWidget::hide);
     connect(m_popup, &PassiveInfo::mouseEntered,
             this, &SystemTray::slotMouseInPopup);
 
     m_fadeStepTimer->start(1500 / STEPS);
 }
 
 // If we receive this signal, it's because we were called during fade out.
 // That means there is a single shot timer about to call slotNextStep, so we
 // don't have to do it ourselves.
 void SystemTray::slotMouseInPopup()
 {
     m_endColor = m_labels[0]->palette().color(QPalette::Text); //textColor();
     disconnect(this, &SystemTray::fadeDone, nullptr, nullptr);
 
     if(m_hasCompositionManager)
         m_popup->setWindowOpacity(1.0);
 
     m_step = STEPS - 1; // Simulate end of fade to solid text
     slotNextStep();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // private methods
 ////////////////////////////////////////////////////////////////////////////////
 
 QWidget *SystemTray::createInfoBox(QBoxLayout *parentLayout, const FileHandle &file)
 {
     // We always show the popup on the right side of the current screen, so
     // this logic assumes that.  Earlier revisions had logic for popup being
     // wherever the systray icon is, so if it's decided to go that route again,
     // dig into the source control history. --mpyne
 
     if(file.coverInfo()->hasCover()) {
         addCoverButton(parentLayout, file.coverInfo()->pixmap(CoverInfo::Thumbnail));
         addSeparatorLine(parentLayout);
     }
 
     auto infoBox = new QWidget;
     auto infoBoxVLayout = new QVBoxLayout(infoBox);
     infoBoxVLayout->setSpacing(3);
     infoBoxVLayout->setContentsMargins(3, 3, 3, 3);
 
     parentLayout->addWidget(infoBox);
 
     addSeparatorLine(parentLayout);
     createButtonBox(parentLayout);
 
     return infoBox;
 }
 
 void SystemTray::createPopup()
 {
     // If the action exists and it's checked, do our stuff
 
     if(!ActionCollection::action("togglePopups")->isChecked())
         return;
 
     const FileHandle playingFile = m_player->playingFile();
     const Tag *const playingInfo = playingFile.tag();
 
     delete m_popup;
     m_popup = nullptr;
     m_fadeStepTimer->stop();
 
     // This will be reset after this function call by slot(Forward|Back)
     // so it's safe to set it true here.
     m_fade = true;
     m_step = 0;
 
     m_popup = new PassiveInfo;
     connect(m_popup, &QObject::destroyed,
             this,    &SystemTray::slotPopupDestroyed);
     connect(m_popup, &PassiveInfo::timeExpired,
             this,    &SystemTray::slotFadeOut);
     connect(m_popup, &PassiveInfo::nextSong,
             this,    &SystemTray::slotForward);
     connect(m_popup, &PassiveInfo::previousSong,
             this,    &SystemTray::slotBack);
 
     // The fadeout requires the popup to be alive
     connect(m_fadeStepTimer, &QTimer::timeout,
             m_popup /* context */, [this]() { slotNextStep(); });
 
     auto box = new QWidget;
     auto boxHLayout = new QHBoxLayout(box);
 
     boxHLayout->setSpacing(15); // Add space between text and buttons
 
     QWidget *infoBox = createInfoBox(boxHLayout, playingFile);
     QLayout *infoBoxLayout = infoBox->layout();
 
     for(int i = 0; i < m_labels.size(); ++i) {
         QLabel *l = new QLabel(" ");
         l->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
         m_labels[i] = l;
         infoBoxLayout->addWidget(l); // layout takes ownership
     }
 
     // We have to set the text of the labels after all of the
     // widgets have been added in order for the width to be calculated
     // correctly.
 
     int labelCount = 0;
 
     QString title = playingInfo->title().toHtmlEscaped();
     m_labels[labelCount++]->setText(QString("<qt><nobr><h2>%1</h2></nobr></qt>").arg(title));
 
     if(!playingInfo->artist().isEmpty())
         m_labels[labelCount++]->setText(playingInfo->artist());
 
     if(!playingInfo->album().isEmpty()) {
         QString album = playingInfo->album().toHtmlEscaped();
         QString s = playingInfo->year() > 0
             ? QString("<qt><nobr>%1 (%2)</nobr></qt>").arg(album).arg(playingInfo->year())
             : QString("<qt><nobr>%1</nobr></qt>").arg(album);
         m_labels[labelCount++]->setText(s);
     }
 
     m_popup->setView(box);
     m_popup->show();
 }
 
 void SystemTray::createButtonBox(QBoxLayout *parentLayout)
 {
     auto buttonBox = new QWidget;
     auto buttonBoxVLayout = new QVBoxLayout(buttonBox);
 
     buttonBoxVLayout->setSpacing(3);
 
     QPushButton *forwardButton = new QPushButton(m_forwardPix, QString());
     forwardButton->setObjectName(QLatin1String("popup_forward"));
     connect(forwardButton, &QPushButton::clicked,
             this,          &SystemTray::slotForward);
 
     QPushButton *backButton = new QPushButton(m_backPix, QString());
     backButton->setObjectName(QLatin1String("popup_back"));
     connect(backButton, &QPushButton::clicked,
             this,       &SystemTray::slotBack);
 
     buttonBoxVLayout->addWidget(forwardButton);
     buttonBoxVLayout->addWidget(backButton);
     parentLayout->addWidget(buttonBox);
 }
 
 /**
  * What happens here is that the action->trigger() call will end up invoking
  * createPopup(), which sets m_fade to true.  Before the text starts fading
  * control returns to this function, which resets m_fade to false.
  */
 void SystemTray::slotBack()
 {
     ActionCollection::action("back")->trigger();
     m_fade = false;
 }
 
 void SystemTray::slotForward()
 {
     ActionCollection::action("forward")->trigger();
     m_fade = false;
 }
 
 void SystemTray::addSeparatorLine(QBoxLayout *parentLayout)
 {
     QFrame *line = new QFrame;
     line->setFrameShape(QFrame::VLine);
 
     // Cover art takes up 80 pixels, make sure we take up at least 80 pixels
     // even if we don't show the cover art for consistency.
 
     line->setMinimumHeight(80);
 
     parentLayout->addWidget(line);
 }
 
 void SystemTray::addCoverButton(QBoxLayout *parentLayout, const QPixmap &cover)
 {
     QPushButton *coverButton = new QPushButton;
 
     coverButton->setIconSize(cover.size());
     coverButton->setIcon(cover);
     coverButton->setFixedSize(cover.size());
     coverButton->setFlat(true);
 
     connect(coverButton, &QPushButton::clicked,
             this,        &SystemTray::slotPopupLargeCover);
 
     parentLayout->addWidget(coverButton);
 }
 
 QColor SystemTray::interpolateColor(int step, int steps)
 {
     if(step < 0)
         return m_startColor;
     if(step >= steps)
         return m_endColor;
 
     // TODO: Perhaps the algorithm here could be better?  For example, it might
     // make sense to go rather quickly from start to end and then slow down
     // the progression.
     return QColor(
             (step * m_endColor.red()   + (steps - step) * m_startColor.red())   / steps,
             (step * m_endColor.green() + (steps - step) * m_startColor.green()) / steps,
             (step * m_endColor.blue()  + (steps - step) * m_startColor.blue())  / steps
            );
 }
 
 void SystemTray::setToolTip(const QString &tip, const QPixmap &cover)
 {
     if(tip.isEmpty())
         KStatusNotifierItem::setToolTip("juk", i18n("JuK"), QString());
     else {
         QIcon myCover;
         if(cover.isNull()) {
             myCover = "juk"_icon;
         } else {
             //Scale to proper icon size, otherwise KStatusNotifierItem will show an unknown icon
             const int iconSize = KIconLoader::global()->currentSize(KIconLoader::Desktop);
             myCover = QIcon(cover.scaled(iconSize, iconSize, Qt::KeepAspectRatio, Qt::SmoothTransformation));
         }
 
         KStatusNotifierItem::setToolTip(myCover, i18n("JuK"), tip);
     }
 }
 
 void SystemTray::scrollEvent(int delta, Qt::Orientation orientation)
 {
     if(orientation == Qt::Horizontal)
         return;
 
     switch(QApplication::queryKeyboardModifiers()) {
     case Qt::ShiftModifier:
         if(delta > 0)
             ActionCollection::action("volumeUp")->trigger();
         else
             ActionCollection::action("volumeDown")->trigger();
         break;
     default:
         if(delta > 0)
             ActionCollection::action("forward")->trigger();
         else
             ActionCollection::action("back")->trigger();
         break;
     }
 }
 
 // vim: set et sw=4 tw=0 sta: