// Copyright 2005-2020 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.

#include "MainWindow.h"

#include "About.h"
#include "ACL.h"
#include "ACLEditor.h"
#include "AudioInput.h"
#include "AudioStats.h"
#include "AudioWizard.h"
#include "BanEditor.h"
#include "CELTCodec.h"
#ifdef USE_OPUS
# include "OpusCodec.h"
#endif
#include "Cert.h"
#include "Channel.h"
#include "Connection.h"
#include "ConnectDialog.h"
#include "Database.h"
#include "DeveloperConsole.h"
#include "GlobalShortcut.h"
#include "Log.h"
#include "Net.h"
#include "NetworkConfig.h"
#include "OverlayClient.h"
#include "Plugins.h"
#include "PTTButtonWidget.h"
#include "RichTextEditor.h"
#include "ServerHandler.h"
#include "TextMessage.h"
#include "Tokens.h"
#include "User.h"
#include "UserEdit.h"
#include "UserInformation.h"
#include "UserModel.h"
#include "UserLocalVolumeDialog.h"
#include "VersionCheck.h"
#include "ViewCert.h"
#include "VoiceRecorderDialog.h"
#include "../SignalCurry.h"
#include "Settings.h"
#include "Themes.h"
#include "SSLCipherInfo.h"
#include "Screen.h"
#include "SvgIcon.h"
#include "Utils.h"
#include "ListenerLocalVolumeDialog.h"
#include "ChannelListener.h"

#ifdef Q_OS_WIN
# include "TaskList.h"
#endif

#ifdef Q_OS_MAC
# include "AppNap.h"
#endif

#include <QtCore/QStandardPaths>
#include <QtCore/QUrlQuery>
#include <QtGui/QClipboard>
#include <QtGui/QDesktopServices>
#include <QtGui/QImageReader>
#include <QtGui/QScreen>
#include <QtWidgets/QDesktopWidget>
#include <QtWidgets/QFileDialog>
#include <QtWidgets/QInputDialog>
#include <QtWidgets/QMessageBox>
#include <QtWidgets/QScrollBar>
#include <QtWidgets/QToolTip>
#include <QtWidgets/QWhatsThis>

#ifdef Q_OS_WIN
# include <dbt.h>
#endif

// We define a global macro called 'g'. This can lead to issues when included code uses 'g' as a type or parameter name (like protobuf 3.7 does). As such, for now, we have to make this our last include.
#include "Global.h"

MessageBoxEvent::MessageBoxEvent(QString m) : QEvent(static_cast<QEvent::Type>(MB_QEVENT)) {
	msg = m;
}

OpenURLEvent::OpenURLEvent(QUrl u) : QEvent(static_cast<QEvent::Type>(OU_QEVENT)) {
	url = u;
}

MainWindow::MainWindow(QWidget *p) : QMainWindow(p) {
	SvgIcon::addSvgPixmapsToIcon(qiIconMuteSelf, QLatin1String("skin:muted_self.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiIconMuteServer, QLatin1String("skin:muted_server.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiIconMuteSuppressed, QLatin1String("skin:muted_suppressed.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiIconMutePushToMute, QLatin1String("skin:muted_pushtomute.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiIconDeafSelf, QLatin1String("skin:deafened_self.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiIconDeafServer, QLatin1String("skin:deafened_server.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiTalkingOff, QLatin1String("skin:talking_off.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiTalkingOn, QLatin1String("skin:talking_on.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiTalkingShout, QLatin1String("skin:talking_alt.svg"));
	SvgIcon::addSvgPixmapsToIcon(qiTalkingWhisper, QLatin1String("skin:talking_whisper.svg"));

#ifdef Q_OS_MAC
	if (QFile::exists(QLatin1String("skin:mumble.icns")))
		qiIcon.addFile(QLatin1String("skin:mumble.icns"));
	else
		SvgIcon::addSvgPixmapsToIcon(qiIcon, QLatin1String("skin:mumble.svg"));
#else
	{
		SvgIcon::addSvgPixmapsToIcon(qiIcon, QLatin1String("skin:mumble.svg"));
	}

	// Set application icon except on MacOSX, where the window-icon
	// shown in the title-bar usually serves as a draggable version of the
	// current open document (i.e. you can copy the open document anywhere
	// simply by dragging this icon).
	qApp->setWindowIcon(qiIcon);
	
	// Set the icon on the MainWindow directly. This fixes the icon not
	// being set on the MainWindow in certain environments (Ex: GTK+).
	setWindowIcon(qiIcon);
#endif

#ifdef Q_OS_WIN
	uiNewHardware = 1;
#endif
	bSuppressAskOnQuit = false;
	restartOnQuit = false;
	bAutoUnmute = false;

	Channel::add(0, tr("Root"));

	aclEdit = NULL;
	banEdit = NULL;
	userEdit = NULL;
	tokenEdit = NULL;

	voiceRecorderDialog = NULL;

	qwPTTButtonWidget = NULL;

	qtReconnect = new QTimer(this);
	qtReconnect->setInterval(10000);
	qtReconnect->setSingleShot(true);
	qtReconnect->setObjectName(QLatin1String("Reconnect"));

	qmUser = new QMenu(tr("&User"), this);
	qmChannel = new QMenu(tr("&Channel"), this);
	qmListener = new QMenu(tr("&Listener"), this);

	qmDeveloper = new QMenu(tr("&Developer"), this);

	qaEmpty = new QAction(tr("No action available..."), this);
	qaEmpty->setEnabled(false);

	createActions();
	setupUi(this);
	setupGui();

	connect(qmUser, SIGNAL(aboutToShow()), this, SLOT(qmUser_aboutToShow()));
	connect(qmChannel, SIGNAL(aboutToShow()), this, SLOT(qmChannel_aboutToShow()));
	connect(qmListener, SIGNAL(aboutToShow()), this, SLOT(qmListener_aboutToShow()));
	connect(qteChat, SIGNAL(entered(QString)), this, SLOT(sendChatbarMessage(QString)));

	// Tray
	connect(qstiIcon, SIGNAL(messageClicked()), this, SLOT(showRaiseWindow()));
	connect(qaShow, SIGNAL(triggered()), this, SLOT(showRaiseWindow()));

	// Explicitely add actions to mainwindow so their shortcuts are available
	// if only the main window is visible (e.g. minimal mode)
	addActions(findChildren<QAction*>());

	on_qmServer_aboutToShow();
	on_qmSelf_aboutToShow();
	qmChannel_aboutToShow();
	qmUser_aboutToShow();
	on_qmConfig_aboutToShow();
	qmDeveloper->addAction(qaDeveloperConsole);

	setOnTop(g.s.aotbAlwaysOnTop == Settings::OnTopAlways ||
	         (g.s.bMinimalView && g.s.aotbAlwaysOnTop == Settings::OnTopInMinimal) ||
	         (!g.s.bMinimalView && g.s.aotbAlwaysOnTop == Settings::OnTopInNormal));

#ifdef NO_UPDATE_CHECK
	delete qaHelpVersionCheck;
#endif
}

void MainWindow::createActions() {
	int idx = 1;
	gsPushTalk=new GlobalShortcut(this, idx++, tr("Push-to-Talk", "Global Shortcut"));
	gsPushTalk->setObjectName(QLatin1String("PushToTalk"));
	gsPushTalk->qsToolTip = tr("Push and hold this button to send voice.", "Global Shortcut");
	gsPushTalk->qsWhatsThis = tr("This configures the push-to-talk button, and as long as you hold this button down, you will transmit voice.", "Global Shortcut");


	gsResetAudio=new GlobalShortcut(this, idx++, tr("Reset Audio Processor", "Global Shortcut"));
	gsResetAudio->setObjectName(QLatin1String("ResetAudio"));

	gsMuteSelf=new GlobalShortcut(this, idx++, tr("Mute Self", "Global Shortcut"), 0);
	gsMuteSelf->setObjectName(QLatin1String("gsMuteSelf"));
	gsMuteSelf->qsToolTip = tr("Set self-mute status.", "Global Shortcut");
	gsMuteSelf->qsWhatsThis = tr("This will set or toggle your muted status. If you turn this off, you will also disable self-deafen.", "Global Shortcut");

	gsDeafSelf=new GlobalShortcut(this, idx++, tr("Deafen Self", "Global Shortcut"), 0);
	gsDeafSelf->setObjectName(QLatin1String("gsDeafSelf"));
	gsDeafSelf->qsToolTip = tr("Set self-deafen status.", "Global Shortcut");
	gsDeafSelf->qsWhatsThis = tr("This will set or toggle your deafened status. If you turn this on, you will also enable self-mute.", "Global Shortcut");

	gsUnlink=new GlobalShortcut(this, idx++, tr("Unlink Plugin", "Global Shortcut"));
	gsUnlink->setObjectName(QLatin1String("UnlinkPlugin"));

	gsPushMute=new GlobalShortcut(this, idx++, tr("Push-to-Mute", "Global Shortcut"));
	gsPushMute->setObjectName(QLatin1String("PushToMute"));

	gsJoinChannel=new GlobalShortcut(this, idx++, tr("Join Channel", "Global Shortcut"));
	gsJoinChannel->setObjectName(QLatin1String("MetaChannel"));
	gsJoinChannel->qsToolTip = tr("Use in conjunction with Whisper to.", "Global Shortcut");

	gsToggleOverlay=new GlobalShortcut(this, idx++, tr("Toggle Overlay", "Global Shortcut"));
	gsToggleOverlay->setObjectName(QLatin1String("ToggleOverlay"));
	gsToggleOverlay->qsToolTip = tr("Toggle state of in-game overlay.", "Global Shortcut");
	gsToggleOverlay->qsWhatsThis = tr("This will switch the states of the in-game overlay.", "Global Shortcut");
	connect(gsToggleOverlay, SIGNAL(down(QVariant)), g.o, SLOT(toggleShow()));

	gsMinimal=new GlobalShortcut(this, idx++, tr("Toggle Minimal", "Global Shortcut"));
	gsMinimal->setObjectName(QLatin1String("ToggleMinimal"));

	gsVolumeUp=new GlobalShortcut(this, idx++, tr("Volume Up (+10%)", "Global Shortcut"));
	gsVolumeUp->setObjectName(QLatin1String("VolumeUp"));

	gsVolumeDown=new GlobalShortcut(this, idx++, tr("Volume Down (-10%)", "Global Shortcut"));
	gsVolumeDown->setObjectName(QLatin1String("VolumeDown"));

	qstiIcon = new QSystemTrayIcon(qiIcon, this);
	qstiIcon->setToolTip(tr("Mumble -- %1").arg(QLatin1String(MUMBLE_RELEASE)));
	qstiIcon->setObjectName(QLatin1String("Icon"));

	gsWhisper = new GlobalShortcut(this, idx++, tr("Whisper/Shout"), QVariant::fromValue(ShortcutTarget()));
	gsWhisper->setObjectName(QLatin1String("gsWhisper"));

	gsLinkChannel=new GlobalShortcut(this, idx++, tr("Link Channel", "Global Shortcut"));
	gsLinkChannel->setObjectName(QLatin1String("MetaLink"));
	gsLinkChannel->qsToolTip = tr("Use in conjunction with Whisper to.", "Global Shortcut");

	gsCycleTransmitMode=new GlobalShortcut(this, idx++, tr("Cycle Transmit Mode", "Global Shortcut"));
	gsCycleTransmitMode->setObjectName(QLatin1String("gsCycleTransmitMode"));

	gsTransmitModePushToTalk=new GlobalShortcut(this, idx++, tr("Set Transmit Mode to Push-To-Talk", "Global Shortcut"));
	gsTransmitModePushToTalk->setObjectName(QLatin1String("gsTransmitModePushToTalk"));

	gsTransmitModeContinuous=new GlobalShortcut(this, idx++, tr("Set Transmit Mode to Continuous", "Global Shortcut"));
	gsTransmitModeContinuous->setObjectName(QLatin1String("gsTransmitModeContinuous"));

	gsTransmitModeVAD=new GlobalShortcut(this, idx++, tr("Set Transmit Mode to VAD", "Global Shortcut"));
	gsTransmitModeVAD->setObjectName(QLatin1String("gsTransmitModeVAD"));

	gsSendTextMessage=new GlobalShortcut(this, idx++, tr("Send Text Message", "Global Shortcut"), QVariant(QString()));
	gsSendTextMessage->setObjectName(QLatin1String("gsSendTextMessage"));

	gsSendClipboardTextMessage=new GlobalShortcut(this, idx++, tr("Send Clipboard Text Message", "Global Shortcut"));
	gsSendClipboardTextMessage->setObjectName(QLatin1String("gsSendClipboardTextMessage"));
	gsSendClipboardTextMessage->qsWhatsThis = tr("This will send your Clipboard content to the channel you are currently in.", "Global Shortcut");

#ifndef Q_OS_MAC
	qstiIcon->show();
#endif
}

void MainWindow::setupGui()  {
	updateWindowTitle();
	setCentralWidget(qtvUsers);
	setAcceptDrops(true);

#ifdef Q_OS_MAC
	QMenu *qmWindow = new QMenu(tr("&Window"), this);
	menubar->insertMenu(qmHelp->menuAction(), qmWindow);
	qmWindow->addAction(tr("Minimize"), this, SLOT(showMinimized()), QKeySequence(tr("Ctrl+M")));

	qtvUsers->setAttribute(Qt::WA_MacShowFocusRect, false);
	qteChat->setAttribute(Qt::WA_MacShowFocusRect, false);
	qteChat->setFrameShape(QFrame::NoFrame);
	qteLog->setFrameStyle(QFrame::NoFrame);
#endif

	LogDocument *ld = new LogDocument(qteLog);
	qteLog->setDocument(ld);

	qteLog->document()->setMaximumBlockCount(g.s.iMaxLogBlocks);
	qteLog->document()->setDefaultStyleSheet(qApp->styleSheet());

	pmModel = new UserModel(qtvUsers);
	qtvUsers->setModel(pmModel);
	qtvUsers->setRowHidden(0, QModelIndex(), true);
	qtvUsers->ensurePolished();

	qaAudioMute->setChecked(g.s.bMute);
	qaAudioDeaf->setChecked(g.s.bDeaf);
#ifdef USE_NO_TTS
	qaAudioTTS->setChecked(false);
	qaAudioTTS->setDisabled(true);
#else
	qaAudioTTS->setChecked(g.s.bTTS);
#endif
	qaFilterToggle->setChecked(g.s.bFilterActive);

	qaHelpWhatsThis->setShortcuts(QKeySequence::WhatsThis);

	qaConfigMinimal->setChecked(g.s.bMinimalView);
	qaConfigHideFrame->setChecked(g.s.bHideFrame);

	connect(gsResetAudio, SIGNAL(down(QVariant)), qaAudioReset, SLOT(trigger()));
	connect(gsUnlink, SIGNAL(down(QVariant)), qaAudioUnlink, SLOT(trigger()));
	connect(gsMinimal, SIGNAL(down(QVariant)), qaConfigMinimal, SLOT(trigger()));

	dtbLogDockTitle = new DockTitleBar();
	qdwLog->setTitleBarWidget(dtbLogDockTitle);

	foreach(QWidget *w, qdwLog->findChildren<QWidget *>()) {
		w->installEventFilter(dtbLogDockTitle);
		w->setMouseTracking(true);
	}

	dtbChatDockTitle = new DockTitleBar();
	qdwChat->setTitleBarWidget(dtbChatDockTitle);
	qdwChat->installEventFilter(dtbChatDockTitle);
	qteChat->setDefaultText(tr("<center>Not connected</center>"), true);
	qteChat->setEnabled(false);

	setShowDockTitleBars((g.s.wlWindowLayout == Settings::LayoutCustom) && !g.s.bLockLayout);

#ifdef Q_OS_MAC
	// Workaround for QTBUG-3116 -- using a unified toolbar on Mac OS X
	// and using restoreGeometry before the window has updated its frameStrut
	// causes the MainWindow to jump around on screen on launch.  Workaround
	// is to call show() to update the frameStrut and set the windowOpacity to
	// 0 to hide any graphical glitches that occur when we add stuff to the
	// window.
	setWindowOpacity(0.0f);
	show();
#endif

	connect(qtvUsers->selectionModel(),
	        SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)),
	        SLOT(qtvUserCurrentChanged(const QModelIndex &, const QModelIndex &)));

	// QtCreator and uic.exe do not allow adding arbitrary widgets
	// such as a MUComboBox to a QToolbar, even though they are supported.
	qcbTransmitMode = new MUComboBox(qtIconToolbar);
	qcbTransmitMode->setObjectName(QLatin1String("qcbTransmitMode"));
	qcbTransmitMode->addItem(tr("Continuous"));
	qcbTransmitMode->addItem(tr("Voice Activity"));
	qcbTransmitMode->addItem(tr("Push-to-Talk"));

	qaTransmitModeSeparator = qtIconToolbar->insertSeparator(qaConfigDialog);
	qaTransmitMode = qtIconToolbar->insertWidget(qaTransmitModeSeparator, qcbTransmitMode);

	connect(qcbTransmitMode, SIGNAL(activated(int)),
	        this, SLOT(qcbTransmitMode_activated(int)));

	updateTransmitModeComboBox();

#ifdef Q_OS_WIN
	setupView(false);
#endif

	if (g.s.bMinimalView && ! g.s.qbaMinimalViewGeometry.isNull())
		restoreGeometry(g.s.qbaMinimalViewGeometry);
	else if (! g.s.bMinimalView && ! g.s.qbaMainWindowGeometry.isNull())
		restoreGeometry(g.s.qbaMainWindowGeometry);

	if (g.s.bMinimalView && ! g.s.qbaMinimalViewState.isNull())
		restoreState(g.s.qbaMinimalViewState);
	else if (! g.s.bMinimalView && ! g.s.qbaMainWindowState.isNull())
		restoreState(g.s.qbaMainWindowState);

	setupView(false);

	qmTray = new QMenu(this);
	connect(qmTray, SIGNAL(aboutToShow()), this, SLOT(trayAboutToShow()));
	trayAboutToShow();
	qstiIcon->setContextMenu(qmTray);

	updateTrayIcon();

#ifdef Q_OS_MAC
	setWindowOpacity(1.0f);
#endif
}

void MainWindow::updateWindowTitle() {
	QString title;
	if (g.s.bMinimalView) {
		title = tr("Mumble - Minimal View -- %1");
	} else {
		title = tr("Mumble -- %1");
	}
	setWindowTitle(title.arg(QLatin1String(MUMBLE_RELEASE)));
}

void MainWindow::updateToolbar() {
	bool layoutIsCustom = g.s.wlWindowLayout == Settings::LayoutCustom;
	qtIconToolbar->setMovable(layoutIsCustom && !g.s.bLockLayout);

	// Update the toolbar so the movable flag takes effect.
	if (layoutIsCustom) {
		// Update the toolbar, but keep it in place.
		addToolBar(toolBarArea(qtIconToolbar), qtIconToolbar);
	} else {
		// Update the toolbar, and ensure it is at the top of the window.
		addToolBar(Qt::TopToolBarArea, qtIconToolbar);
	}
}

// Sets whether or not to show the title bars on the MainWindow's
// dock widgets.
void MainWindow::setShowDockTitleBars(bool doShow) {
	dtbLogDockTitle->setEnabled(doShow);
	dtbChatDockTitle->setEnabled(doShow);
}

MainWindow::~MainWindow() {
	delete qwPTTButtonWidget;
	delete qdwLog->titleBarWidget();
	delete pmModel;
	delete qtvUsers;
	delete Channel::get(0);
}

void MainWindow::msgBox(QString msg) {
	MessageBoxEvent *mbe=new MessageBoxEvent(msg);
	QApplication::postEvent(this, mbe);
}

#ifdef Q_OS_WIN
bool MainWindow::nativeEvent(const QByteArray &, void *message, long *) {
	MSG *msg = reinterpret_cast<MSG *>(message);
	if (msg->message == WM_DEVICECHANGE && msg->wParam == DBT_DEVNODES_CHANGED)
		uiNewHardware++;

	return false;
}
#endif

void MainWindow::closeEvent(QCloseEvent *e) {
#ifndef Q_OS_MAC
	ServerHandlerPtr sh = g.sh;
	if (sh && sh->isRunning() && g.s.bAskOnQuit && !bSuppressAskOnQuit) {
		QMessageBox mb(QMessageBox::Warning, QLatin1String("Mumble"), tr("Mumble is currently connected to a server. Do you want to Close or Minimize it?"), QMessageBox::NoButton, this);
		QPushButton *qpbClose = mb.addButton(tr("Close"), QMessageBox::YesRole);
		QPushButton *qpbMinimize = mb.addButton(tr("Minimize"), QMessageBox::NoRole);
		QPushButton *qpbCancel = mb.addButton(tr("Cancel"), QMessageBox::RejectRole);
		mb.setDefaultButton(qpbClose);
		mb.setEscapeButton(qpbCancel);
		mb.exec();
		if (mb.clickedButton() == qpbMinimize) {
			showMinimized();
			e->ignore();
			return;
		} else if (mb.clickedButton() == qpbCancel) {
			e->ignore();
			return;
		}
	}
	sh.reset();
#endif
	// Save ChannelListeners (has to be done before resetting g.uiSession
	ChannelListener::saveToDB();

	g.uiSession = 0;
	g.pPermissions = ChanACL::None;

	if (g.s.bMinimalView) {
		g.s.qbaMinimalViewGeometry = saveGeometry();
		g.s.qbaMinimalViewState = saveState();
	} else {
		g.s.qbaMainWindowGeometry = saveGeometry();
		g.s.qbaMainWindowState = saveState();
		g.s.qbaHeaderState = qtvUsers->header()->saveState();
	}

	if (qwPTTButtonWidget) {
		qwPTTButtonWidget->close();
		qwPTTButtonWidget->deleteLater();
		qwPTTButtonWidget = NULL;
	}
	g.bQuit = true;

	QMainWindow::closeEvent(e);
	
	qApp->exit(restartOnQuit ? MUMBLE_EXIT_CODE_RESTART : 0);
}

void MainWindow::hideEvent(QHideEvent *e) {
	if (g.ocIntercept) {
		QMetaObject::invokeMethod(g.ocIntercept, "hideGui", Qt::QueuedConnection);
		e->ignore();
		return;
	}
#ifndef Q_OS_MAC
#ifdef Q_OS_UNIX
	if (! qApp->activeModalWidget() && ! qApp->activePopupWidget())
#endif
		if (g.s.bHideInTray && qstiIcon->isSystemTrayAvailable() && e->spontaneous())
			QMetaObject::invokeMethod(this, "hide", Qt::QueuedConnection);
	QMainWindow::hideEvent(e);
#endif
}

void MainWindow::showEvent(QShowEvent *e) {
#ifndef Q_OS_MAC
#ifdef Q_OS_UNIX
	if (! qApp->activeModalWidget() && ! qApp->activePopupWidget())
#endif
		if (g.s.bHideInTray && qstiIcon->isSystemTrayAvailable() && e->spontaneous())
			QMetaObject::invokeMethod(this, "show", Qt::QueuedConnection);
#endif
	QMainWindow::showEvent(e);
}

void MainWindow::changeEvent(QEvent *e) {
	QWidget::changeEvent(e);

#ifdef Q_OS_MAC
	// On modern macOS/Qt combinations, the code below causes Mumble's
	// MainWindow to not be interactive after returning from being minimized.
	// (See issue mumble-voip/mumble#2171)
	// So, let's not do it on macOS.

#else
	if (isMinimized() && qstiIcon->isSystemTrayAvailable() && g.s.bHideInTray) {
		// Workaround http://qt-project.org/forums/viewthread/4423/P15/#50676
		QTimer::singleShot(0, this, SLOT(hide()));
	}
#endif
}

void MainWindow::keyPressEvent(QKeyEvent *e) {
	// Pressing F6 switches between the main
	// window's main widgets, making it easier
	// to navigate Mumble's MainWindow with only
	// a keyboard.
	if (e->key() == Qt::Key_F6) {
		focusNextMainWidget();
	} else {
		QMainWindow::keyPressEvent(e);
	}
}

/// focusNextMainWidget switches the focus to the next main
/// widget of the MainWindow.
///
/// This is used to implement behavior where pressing F6
/// switches between major elements of an application.
/// This behavior is for example seen in Windows's (File) Explorer.
///
/// The main widgets are qteLog (the log view), qteChat (chat input bar)
/// and qtvUsers (users tree view).
void MainWindow::focusNextMainWidget() {
	QWidget *mainFocusWidgets[] = {
		qteLog,
		qteChat,
		qtvUsers,
	};
	const int numMainFocusWidgets = sizeof(mainFocusWidgets)/sizeof(mainFocusWidgets[0]);

	int currentMainFocusWidgetIndex = -1;

	QWidget *w = focusWidget();
	for (int i = 0; i < numMainFocusWidgets; i++) {
		QWidget *mainFocusWidget = mainFocusWidgets[i];
		if (w == mainFocusWidget || w->isAncestorOf(mainFocusWidget)) {
			currentMainFocusWidgetIndex = i;
			break;
		}
	}

	Q_ASSERT(currentMainFocusWidgetIndex != -1);

	int nextMainFocusWidgetIndex = (currentMainFocusWidgetIndex + 1) % numMainFocusWidgets;
	QWidget *nextMainFocusWidget = mainFocusWidgets[nextMainFocusWidgetIndex];
	nextMainFocusWidget->setFocus();
}

void MainWindow::updateTrayIcon() {
	ClientUser *p=ClientUser::get(g.uiSession);

	if (g.s.bDeaf) {
		qstiIcon->setIcon(qiIconDeafSelf);
	} else if (p && p->bDeaf) {
		qstiIcon->setIcon(qiIconDeafServer);
	} else if (g.s.bMute) {
		qstiIcon->setIcon(qiIconMuteSelf);
	} else if (p && p->bMute) {
		qstiIcon->setIcon(qiIconMuteServer);
	} else if (p && p->bSuppress) {
		qstiIcon->setIcon(qiIconMuteSuppressed);
	} else if (g.s.bStateInTray && g.bPushToMute) {
		qstiIcon->setIcon(qiIconMutePushToMute);
	} else if (p && g.s.bStateInTray) {
		switch (p->tsState) {
			case Settings::Talking:
				qstiIcon->setIcon(qiTalkingOn);
				break;
			case Settings::Whispering:
				qstiIcon->setIcon(qiTalkingWhisper);
				break;
			case Settings::Shouting:
				qstiIcon->setIcon(qiTalkingShout);
				break;
			case Settings::Passive:
			default:
				qstiIcon->setIcon(qiTalkingOff);
				break;
		}
	} else {
		qstiIcon->setIcon(qiIcon);
	}
}

void MainWindow::updateUserModel()
{
	UserModel *um = static_cast<UserModel *>(qtvUsers->model());
	um->toggleChannelFiltered(NULL); // Force a UI refresh
}

void MainWindow::updateTransmitModeComboBox() {
	switch (g.s.atTransmit) {
		case Settings::Continuous:
			qcbTransmitMode->setCurrentIndex(0);
			return;
		case Settings::VAD:
			qcbTransmitMode->setCurrentIndex(1);
			return;
		case Settings::PushToTalk:
			qcbTransmitMode->setCurrentIndex(2);
			return;
	}
}

QMenu *MainWindow::createPopupMenu() {
	if ((g.s.wlWindowLayout == Settings::LayoutCustom) && !g.s.bLockLayout) {
		return QMainWindow::createPopupMenu();
	}

	return NULL;
}

Channel *MainWindow::getContextMenuChannel() {
	if (cContextChannel)
		return cContextChannel.data();

	return NULL;
}

ClientUser *MainWindow::getContextMenuUser() {
	if (cuContextUser)
		return cuContextUser.data();

	return NULL;
}

bool MainWindow::handleSpecialContextMenu(const QUrl &url, const QPoint &pos_, bool focus) {
	if (url.scheme() == QString::fromLatin1("clientid")) {
		bool ok = false;
		QString maybeUserHash(url.host());
		if (maybeUserHash.length() == 40) {
			ClientUser *cu = pmModel->getUser(maybeUserHash);
			if (cu) {
				cuContextUser = cu;
				ok = true;
			}
		} else {
			QByteArray qbaServerDigest = QByteArray::fromBase64(url.path().remove(0, 1).toLatin1());
			cuContextUser = ClientUser::get(url.host().toInt(&ok, 10));
			ServerHandlerPtr sh = g.sh;
			ok = ok && sh && (qbaServerDigest == sh->qbaDigest);
		}
		if (ok && cuContextUser) {
			if (focus) {
				qtvUsers->setCurrentIndex(pmModel->index(cuContextUser.data()));
				qteChat->setFocus();
			} else {
				qpContextPosition = QPoint();
				qmUser->exec(pos_, NULL);
			}
		}
		cuContextUser.clear();
	} else if (url.scheme() == QString::fromLatin1("channelid")) {
		bool ok;
		QByteArray qbaServerDigest = QByteArray::fromBase64(url.path().remove(0, 1).toLatin1());
		cContextChannel = Channel::get(url.host().toInt(&ok, 10));
		ServerHandlerPtr sh = g.sh;
		ok = ok && sh && (qbaServerDigest == sh->qbaDigest);
		if (ok) {
			if (focus) {
				qtvUsers->setCurrentIndex(pmModel->index(cContextChannel.data()));
				qteChat->setFocus();
			} else {
				qpContextPosition = QPoint();
				qmChannel->exec(pos_, NULL);
			}
		}
		cContextChannel.clear();
	} else {
		return false;
	}
	return true;
}

void MainWindow::on_qtvUsers_customContextMenuRequested(const QPoint &mpos) {
	QModelIndex idx = qtvUsers->indexAt(mpos);
	if (! idx.isValid())
		idx = qtvUsers->currentIndex();
	else
		qtvUsers->setCurrentIndex(idx);
	ClientUser *p = pmModel->getUser(idx);

	qpContextPosition = mpos;
	if (pmModel->isChannelListener(idx)) {
		// Have a separate context menu for listeners
		QModelIndex parent = idx.parent();

		if (parent.isValid()) {
			// Find the channel in which the action was triggered and set it
			// in order to be able to obtain it in the action itself
			cContextChannel = pmModel->getChannel(parent);
		}
		cuContextUser.clear();
		qmListener->exec(qtvUsers->mapToGlobal(mpos), nullptr);
		cuContextUser.clear();
		cContextChannel.clear();
	} else {
		if (p) {
			cuContextUser.clear();
			qmUser->exec(qtvUsers->mapToGlobal(mpos), qaUserMute);
			cuContextUser.clear();
		} else {
			cContextChannel.clear();
			qmChannel->exec(qtvUsers->mapToGlobal(mpos), NULL);
			cContextChannel.clear();
		}
	}
	qpContextPosition = QPoint();
}

void MainWindow::on_qteLog_customContextMenuRequested(const QPoint &mpos) {
	QString link = qteLog->anchorAt(mpos);
	if (! link.isEmpty()) {
		QUrl l(link);

		if (handleSpecialContextMenu(l, qteLog->mapToGlobal(mpos)))
			return;
	}

	QPoint contentPosition = QPoint(QApplication::isRightToLeft() ? (qteLog->horizontalScrollBar()->maximum() - qteLog->horizontalScrollBar()->value()) : qteLog->horizontalScrollBar()->value(), qteLog->verticalScrollBar()->value());
	QMenu *menu = qteLog->createStandardContextMenu(mpos + contentPosition);

	QTextCursor cursor = qteLog->cursorForPosition(mpos);
	QTextCharFormat fmt = cursor.charFormat();

	// Work around imprecise cursor image identification
	// Apparently, the cursor is shifted half the characters width to the right on the image
	// element. This is in contrast to hyperlinks for example, which have correct edge detection.
	// For the image, we get the right half (plus the left half of the next character) for the
	// image, and have to move the cursor forward to also detect on the left half of the image
	// (plus the right half of the previous character).
	// It is unclear why we have to use NextCharacter instead of PreviousCharacter.
	if (fmt.objectType() == QTextFormat::NoObject) {
		cursor.movePosition(QTextCursor::NextCharacter);
		fmt = cursor.charFormat();
	}
	if (cursor.charFormat().isImageFormat()) {
		menu->addSeparator();
		menu->addAction(tr("Save Image As..."), this, SLOT(saveImageAs(void)));

		qtcSaveImageCursor = cursor;
	}

	menu->addSeparator();
	menu->addAction(tr("Clear"), qteLog, SLOT(clear(void)));
	menu->exec(qteLog->mapToGlobal(mpos));
	delete menu;
}

void MainWindow::saveImageAs() {
	QDateTime now = QDateTime::currentDateTime();
	QString defaultFname = QString::fromLatin1("Mumble-%1.jpg").arg(now.toString(QString::fromLatin1("yyyy-MM-dd-HHmmss")));

	QString fname = QFileDialog::getSaveFileName(this, tr("Save Image File"), getImagePath(defaultFname), tr("Images (*.png *.jpg *.jpeg)"));
	if (fname.isNull()) {
		return;
	}

	QString resName = qtcSaveImageCursor.charFormat().toImageFormat().name();
	QVariant res = qteLog->document()->resource(QTextDocument::ImageResource, resName);
	QImage img = res.value<QImage>();
	bool ok = img.save(fname);
	if (!ok) {
		// In case fname did not contain a file extension, try saving with an
		// explicit format.
		ok = img.save(fname, "PNG");
	}

	updateImagePath(fname);

	if (!ok) {
		g.l->log(Log::Warning, tr("Could not save image: %1").arg(fname.toHtmlEscaped()));
	}
}

QString MainWindow::getImagePath(QString filename) const {
	if (g.s.qsImagePath.isEmpty() || ! QDir(g.s.qsImagePath).exists()) {
		g.s.qsImagePath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
	}
	if (filename.isEmpty()) {
		return g.s.qsImagePath;
	}
	return g.s.qsImagePath + QDir::separator() + filename;
}

void MainWindow::updateImagePath(QString filepath) const {
	QFileInfo fi(filepath);
	g.s.qsImagePath = fi.absolutePath();
}

static void recreateServerHandler() {
	ServerHandlerPtr sh = g.sh;
	if (sh && sh->isRunning()) {
		g.mw->on_qaServerDisconnect_triggered();
		sh->disconnect();
		sh->wait();
		QCoreApplication::instance()->processEvents();
	}

	g.sh.reset();
	while (sh && ! sh.unique())
		QThread::yieldCurrentThread();
	sh.reset();

	sh = ServerHandlerPtr(new ServerHandler());
	sh->moveToThread(sh.get());
	g.sh = sh;
	g.mw->connect(sh.get(), SIGNAL(connected()), g.mw, SLOT(serverConnected()));
	g.mw->connect(sh.get(), SIGNAL(disconnected(QAbstractSocket::SocketError, QString)), g.mw, SLOT(serverDisconnected(QAbstractSocket::SocketError, QString)));
	g.mw->connect(sh.get(), SIGNAL(error(QAbstractSocket::SocketError, QString)), g.mw, SLOT(resolverError(QAbstractSocket::SocketError, QString)));
}

void MainWindow::openUrl(const QUrl &url) {
	g.l->log(Log::Information, tr("Opening URL %1").arg(url.toString().toHtmlEscaped()));
	if (url.scheme() == QLatin1String("file")) {
		QFile f(url.toLocalFile());
		if (! f.exists() || ! f.open(QIODevice::ReadOnly)) {
			g.l->log(Log::Warning, tr("File does not exist"));
			return;
		}
		f.close();

		QSettings *qs = new QSettings(f.fileName(), QSettings::IniFormat);
		qs->setIniCodec("UTF-8");
		if (qs->status() != QSettings::NoError) {
			g.l->log(Log::Warning, tr("File is not a configuration file."));
		} else {
			qSwap(qs, g.qs);
			g.s.load();
			qSwap(qs, g.qs);

			g.l->log(Log::Warning, tr("Settings merged from file."));
		}
		delete qs;
		return;
	}
	if (url.scheme() != QLatin1String("mumble")) {
		g.l->log(Log::Warning, tr("URL scheme is not 'mumble'"));
		return;
	}

	int major, minor, patch;
	int thismajor, thisminor, thispatch;
	MumbleVersion::get(&thismajor, &thisminor, &thispatch);

	// With no version parameter given assume the link refers to our version
	major = 1;
	minor = 2;
	patch = 0;

	QUrlQuery query(url);
	QString version = query.queryItemValue(QLatin1String("version"));
	MumbleVersion::get(&major, &minor, &patch, version);

	if ((major < 1) || // No pre 1.2.0
	        (major == 1 && minor <= 1) ||
	        (major > thismajor) || // No future version
	        (major == thismajor && minor > thisminor) ||
	        (major == thismajor && minor == thisminor && patch > thispatch)) {
		g.l->log(Log::Warning, tr("This version of Mumble can't handle URLs for Mumble version %1.%2.%3").arg(major).arg(minor).arg(patch));
		return;
	}

	QString host = url.host();
	unsigned short port = static_cast<unsigned short>(url.port(DEFAULT_MUMBLE_PORT));
	QString user = url.userName();
	QString pw = url.password();
	qsDesiredChannel = url.path();
	QString name;

	if (query.hasQueryItem(QLatin1String("title")))
		name = query.queryItemValue(QLatin1String("title"));

	if (g.sh && g.sh->isRunning()) {
		QString oHost, oUser, oPw;
		unsigned short oport;
		g.sh->getConnectionInfo(oHost, oport, oUser, oPw);
		ClientUser *p = ClientUser::get(g.uiSession);

		if ((user.isEmpty() || (p && p->iId >= 0) || (user == oUser)) &&
		        (host.isEmpty() || ((host == oHost) && (port == oport)))) {
			findDesiredChannel();
			return;
		}
	}

	g.db->fuzzyMatch(name, user, pw, host, port);

	if (user.isEmpty()) {
		bool ok;
		user = QInputDialog::getText(this, tr("Connecting to %1").arg(url.toString()), tr("Enter username"), QLineEdit::Normal, g.s.qsUsername, &ok);
		if (! ok || user.isEmpty())
			return;
		g.s.qsUsername = user;
	}

	if (name.isEmpty())
		name = QString::fromLatin1("%1@%2").arg(user).arg(host);

	recreateServerHandler();

	g.s.qsLastServer = name;
	rtLast = MumbleProto::Reject_RejectType_None;
	bRetryServer = true;
	qaServerDisconnect->setEnabled(true);
	g.l->log(Log::Information, tr("Connecting to server %1.").arg(Log::msgColor(host.toHtmlEscaped(), Log::Server)));
	g.sh->setConnectionInfo(host, port, user, pw);
	g.sh->start(QThread::TimeCriticalPriority);
}

/**
 * This function tries to join a desired channel on connect. It gets called
 * directly after server syncronization is completed.
 * @see void MainWindow::msgServerSync(const MumbleProto::ServerSync &msg)
 */
void MainWindow::findDesiredChannel() {
	bool found = false;
	QStringList qlChans = qsDesiredChannel.split(QLatin1String("/"));
	Channel *chan = Channel::get(0);
	QString str = QString();
	while (chan && qlChans.count() > 0) {
		QString elem = qlChans.takeFirst().toLower();
		if (elem.isEmpty())
			continue;
		if (str.isNull())
			str = elem;
		else
			str = str + QLatin1String("/") + elem;
		foreach(Channel *c, chan->qlChannels) {
			if (c->qsName.toLower() == str) {
				str = QString();
				found = true;
				chan = c;
				break;
			}
		}
	}
	if (found) {
		if (chan != ClientUser::get(g.uiSession)->cChannel) {
			g.sh->joinChannel(g.uiSession, chan->iId);
		}
		qtvUsers->setCurrentIndex(pmModel->index(chan));
	} else if (g.uiSession) {
		qtvUsers->setCurrentIndex(pmModel->index(ClientUser::get(g.uiSession)->cChannel));
	}
	updateMenuPermissions();
}

void MainWindow::setOnTop(bool top) {
	Qt::WindowFlags wf = windowFlags();
	if (wf.testFlag(Qt::WindowStaysOnTopHint) != top) {
		if (top)
			wf |= Qt::WindowStaysOnTopHint;
		else
			wf &= ~Qt::WindowStaysOnTopHint;
		setWindowFlags(wf);
		show();
	}
}

void MainWindow::setupView(bool toggle_minimize) {
	bool showit = ! g.s.bMinimalView;

	switch (g.s.wlWindowLayout) {
		case Settings::LayoutClassic:
			removeDockWidget(qdwLog);
			addDockWidget(Qt::LeftDockWidgetArea, qdwLog);
			qdwLog->show();
			splitDockWidget(qdwLog, qdwChat, Qt::Vertical);
			qdwChat->show();
			break;
		case Settings::LayoutStacked:
			removeDockWidget(qdwLog);
			addDockWidget(Qt::BottomDockWidgetArea, qdwLog);
			qdwLog->show();
			splitDockWidget(qdwLog, qdwChat, Qt::Vertical);
			qdwChat->show();
			break;
		case Settings::LayoutHybrid:
			removeDockWidget(qdwLog);
			removeDockWidget(qdwChat);
			addDockWidget(Qt::LeftDockWidgetArea, qdwLog);
			qdwLog->show();
			addDockWidget(Qt::BottomDockWidgetArea, qdwChat);
			qdwChat->show();
			break;
		default:
			break;
	}

	updateToolbar();

	qteChat->updateGeometry();

	QRect geom = frameGeometry();

	if (toggle_minimize) {
		if (! showit) {
			g.s.qbaMainWindowGeometry = saveGeometry();
			g.s.qbaMainWindowState = saveState();
			g.s.qbaHeaderState = qtvUsers->header()->saveState();
		} else {
			g.s.qbaMinimalViewGeometry = saveGeometry();
			g.s.qbaMinimalViewState = saveState();
		}
	}

	Qt::WindowFlags f = Qt::Window;
	if (!showit) {
		if (g.s.bHideFrame) {
			f |= Qt::FramelessWindowHint;
		}
	}
	
	if (g.s.aotbAlwaysOnTop == Settings::OnTopAlways ||
	        (g.s.bMinimalView && g.s.aotbAlwaysOnTop == Settings::OnTopInMinimal) ||
	        (!g.s.bMinimalView && g.s.aotbAlwaysOnTop == Settings::OnTopInNormal)) {
		f |= Qt::WindowStaysOnTopHint;
	}

	if (! graphicsProxyWidget())
		setWindowFlags(f);

	if (g.s.bShowContextMenuInMenuBar) {
		bool found = false;
		foreach(QAction *a, menuBar()->actions()) {
			if (a == qmUser->menuAction()) {
				found = true;
				break;
			}
		}

		if (!found) {
			menuBar()->insertMenu(qmConfig->menuAction(), qmUser);
			menuBar()->insertMenu(qmConfig->menuAction(), qmChannel);
		}
	} else {
		menuBar()->removeAction(qmUser->menuAction());
		menuBar()->removeAction(qmChannel->menuAction());
	}

	if (g.s.bEnableDeveloperMenu) {
		bool found = false;
		foreach(QAction *a, menuBar()->actions()) {
			if (a == qmDeveloper->menuAction()) {
				found = true;
				break;
			}
		}

		if (!found) {
			menuBar()->insertMenu(qmHelp->menuAction(), qmDeveloper);
		}
	} else {
		menuBar()->removeAction(qmDeveloper->menuAction());
	}

	if (! showit) {
		qdwLog->setVisible(showit);
		qdwChat->setVisible(showit);
		qtIconToolbar->setVisible(showit);
	}
	menuBar()->setVisible(showit);

	if (toggle_minimize) {
		if (! showit) {
			if (! g.s.qbaMinimalViewGeometry.isNull())
				restoreGeometry(g.s.qbaMinimalViewGeometry);
			if (! g.s.qbaMinimalViewState.isNull())
				restoreState(g.s.qbaMinimalViewState);
		} else {
			if (! g.s.qbaMainWindowGeometry.isNull())
				restoreGeometry(g.s.qbaMainWindowGeometry);
			if (! g.s.qbaMainWindowState.isNull())
				restoreState(g.s.qbaMainWindowState);
		}
	} else {
		QRect newgeom = frameGeometry();
		resize(geometry().width()-newgeom.width()+geom.width(),
		       geometry().height()-newgeom.height()+geom.height());
		move(geom.x(), geom.y());
	}

	// Display the Transmit Mode Dropdown, if configured to do so, otherwise
	// hide it.
	if (g.s.bShowTransmitModeComboBox) {
		qaTransmitMode->setVisible(true);
		qaTransmitModeSeparator->setVisible(true);
	} else {
		qaTransmitMode->setVisible(false);
		qaTransmitModeSeparator->setVisible(false);
	}

	show();
	activateWindow();

	// If activated show the PTT window
	if (g.s.bShowPTTButtonWindow && g.s.atTransmit == Settings::PushToTalk) {
		if (qwPTTButtonWidget) {
			qwPTTButtonWidget->show();
		} else {
			qwPTTButtonWidget = new PTTButtonWidget();
			qwPTTButtonWidget->show();
			connect(qwPTTButtonWidget, SIGNAL(triggered(bool,QVariant)), SLOT(on_PushToTalk_triggered(bool,QVariant)));
		}
	} else {
		if (qwPTTButtonWidget) {
			qwPTTButtonWidget->deleteLater();
			qwPTTButtonWidget = NULL;
		}
	}
}

void MainWindow::on_qaServerConnect_triggered(bool autoconnect) {
	ConnectDialog *cd = new ConnectDialog(this, autoconnect);
	int res = cd->exec();

	if (cd->qsServer.isEmpty() || (cd->usPort==0) || cd->qsUsername.isEmpty())
		res = QDialog::Rejected;

	if (res == QDialog::Accepted) {
		recreateServerHandler();
		qsDesiredChannel = QString();
		rtLast = MumbleProto::Reject_RejectType_None;
		bRetryServer = true;
		qaServerDisconnect->setEnabled(true);
		g.l->log(Log::Information, tr("Connecting to server %1.").arg(Log::msgColor(cd->qsServer.toHtmlEscaped(), Log::Server)));
		g.sh->setConnectionInfo(cd->qsServer, cd->usPort, cd->qsUsername, cd->qsPassword);
		g.sh->start(QThread::TimeCriticalPriority);
	}
	delete cd;
}

void MainWindow::on_Reconnect_timeout() {
	if (g.sh->isRunning())
		return;
	g.l->log(Log::Information, tr("Reconnecting."));
	g.sh->start(QThread::TimeCriticalPriority);
}

void MainWindow::on_qmSelf_aboutToShow() {
	ClientUser *user = ClientUser::get(g.uiSession);

	qaServerTexture->setEnabled(user != NULL);
	qaSelfComment->setEnabled(user != NULL);

	qaServerTextureRemove->setEnabled(user && ! user->qbaTextureHash.isEmpty());

	qaSelfRegister->setEnabled(user && (user->iId < 0) && ! user->qsHash.isEmpty() && (g.pPermissions & (ChanACL::SelfRegister | ChanACL::Write)));
	if (g.sh && g.sh->uiVersion >= 0x010203) {
		qaSelfPrioritySpeaker->setEnabled(user && g.pPermissions & (ChanACL::Write | ChanACL::MuteDeafen));
		qaSelfPrioritySpeaker->setChecked(user && user->bPrioritySpeaker);
	} else {
		qaSelfPrioritySpeaker->setEnabled(false);
		qaSelfPrioritySpeaker->setChecked(false);
	}
}

void MainWindow::on_qaSelfComment_triggered() {
	ClientUser *p = ClientUser::get(g.uiSession);
	if (!p)
		return;

	if (! p->qbaCommentHash.isEmpty() && p->qsComment.isEmpty()) {
		p->qsComment = QString::fromUtf8(g.db->blob(p->qbaCommentHash));
		if (p->qsComment.isEmpty()) {
			pmModel->uiSessionComment = ~(p->uiSession);
			MumbleProto::RequestBlob mprb;
			mprb.add_session_comment(p->uiSession);
			g.sh->sendMessage(mprb);
			return;
		}
	}

	unsigned int session = p->uiSession;

	::TextMessage *texm = new ::TextMessage(this, tr("Change your comment"));

	texm->rteMessage->setText(p->qsComment);
	int res = texm->exec();

	p = ClientUser::get(session);

	if (p && (res == QDialog::Accepted)) {
		const QString &msg = texm->message();
		MumbleProto::UserState mpus;
		mpus.set_session(session);
		mpus.set_comment(u8(msg));
		g.sh->sendMessage(mpus);

		if (! msg.isEmpty())
			g.db->setBlob(sha1(msg), msg.toUtf8());
	}
	delete texm;
}

void MainWindow::on_qaSelfRegister_triggered() {
	ClientUser *p = ClientUser::get(g.uiSession);
	if (!p)
		return;

	QMessageBox::StandardButton result;
	result = QMessageBox::question(this, tr("Register yourself as %1").arg(p->qsName), tr("<p>You are about to register yourself on this server. This action cannot be undone, and your username cannot be changed once this is done. You will forever be known as '%1' on this server.</p><p>Are you sure you want to register yourself?</p>").arg(p->qsName.toHtmlEscaped()), QMessageBox::Yes|QMessageBox::No);

	if (result == QMessageBox::Yes)
		g.sh->registerUser(p->uiSession);
}

void MainWindow::qcbTransmitMode_activated(int index) {
	switch (index) {
		case 0: // Continuous
			g.s.atTransmit = Settings::Continuous;
			g.l->log(Log::Information, tr("Transmit Mode set to Continuous"));
			return;

		case 1: // Voice Activity
			g.s.atTransmit = Settings::VAD;
			g.l->log(Log::Information, tr("Transmit Mode set to Voice Activity"));
			return;

		case 2: // Push-to-Talk
			g.s.atTransmit = Settings::PushToTalk;
			g.l->log(Log::Information, tr("Transmit Mode set to Push-to-Talk"));
			return;
	}
}

void MainWindow::on_qmServer_aboutToShow() {
	qmServer->clear();
	qmServer->addAction(qaServerConnect);
	qmServer->addSeparator();
	qmServer->addAction(qaServerDisconnect);
	qmServer->addAction(qaServerInformation);
	qmServer->addAction(qaServerTokens);
	qmServer->addAction(qaServerUserList);
	qmServer->addAction(qaServerBanList);
	qmServer->addSeparator();
#if !defined(Q_OS_MAC)
	// Don't add qaHide on macOS.
	// There is no way to bring the window back (no 'tray' for Mumble on macOS),
	// and the system has built-in hide functionality via Cmd-H.
	if (qstiIcon->isSystemTrayAvailable())
		qmServer->addAction(qaHide);
#endif
	qmServer->addAction(qaQuit);

	qaServerBanList->setEnabled(g.pPermissions & (ChanACL::Ban | ChanACL::Write));
	qaServerUserList->setEnabled(g.pPermissions & (ChanACL::Register | ChanACL::Write));
	qaServerInformation->setEnabled(g.uiSession != 0);
	qaServerTokens->setEnabled(g.uiSession != 0);

	if (! qlServerActions.isEmpty()) {
		qmServer->addSeparator();
		foreach(QAction *a, qlServerActions)
			qmServer->addAction(a);
	}
}

void MainWindow::on_qaServerDisconnect_triggered() {
	if (qtReconnect->isActive()) {
		qtReconnect->stop();
		qaServerDisconnect->setEnabled(false);
	}
	if (g.sh && g.sh->isRunning())
		g.sh->disconnect();
}

void MainWindow::on_qaServerBanList_triggered() {
	g.sh->requestBanList();

	if (banEdit) {
		banEdit->reject();
		delete banEdit;
		banEdit = NULL;
	}
}

void MainWindow::on_qaServerUserList_triggered() {
	g.sh->requestUserList();

	if (userEdit) {
		userEdit->reject();
		delete userEdit;
		userEdit = NULL;
	}
}

static const QString currentCodec() {
	if (g.bOpus)
		return QLatin1String("Opus");

	int v = g.bPreferAlpha ? g.iCodecAlpha : g.iCodecBeta;
	CELTCodec* cc = g.qmCodecs.value(v);
	if (cc)
		return QString::fromLatin1("CELT %1").arg(cc->version());
	else
		return QString::fromLatin1("CELT %1").arg(QString::number(v, 16));
}

void MainWindow::on_qaServerInformation_triggered() {
	ConnectionPtr c = g.sh->cConnection;

	if (! c)
		return;

	CryptState &cs = c->csCrypt;
	QSslCipher qsc = g.sh->qscCipher;

	QString qsVersion=tr("<h2>Version</h2><p>Protocol %1</p>").arg(MumbleVersion::toString(g.sh->uiVersion));

	if (g.sh->qsRelease.isEmpty() || g.sh->qsOS.isEmpty() || g.sh->qsOSVersion.isEmpty()) {
		qsVersion.append(tr("<p>No build information or OS version available</p>"));
	} else {
		qsVersion.append(tr("<p>%1 (%2)<br />%3</p>")
		                 .arg(g.sh->qsRelease.toHtmlEscaped(), g.sh->qsOS.toHtmlEscaped(), g.sh->qsOSVersion.toHtmlEscaped()));
	}

	QString host, uname, pw;
	unsigned short port;

	g.sh->getConnectionInfo(host,port,uname,pw);

	const SSLCipherInfo *ci = SSLCipherInfoLookupByOpenSSLName(qsc.name().toLatin1().constData());
	
	QString cipherDescription;
	if (ci && ci->message_authentication && ci->encryption && ci->key_exchange_verbose && ci->rfc_name) {
		if (QString::fromLatin1(ci->message_authentication) == QLatin1String("AEAD")) {
			// Authenticated Encryption with Associated Data
			// See https://en.wikipedia.org/wiki/Authenticated_encryption
			cipherDescription = tr(
			    "The connection is encrypted and authenticated "
			    "using %1 and uses %2 as the key exchange mechanism (%3)").arg(
			        QString::fromLatin1(ci->encryption),
			        QString::fromLatin1(ci->key_exchange_verbose),
			        QString::fromLatin1(ci->rfc_name));
		} else {
			cipherDescription = tr(
			    "The connection is encrypted using %1, with %2 "
			    "for message authentication and %3 as the key "
			    "exchange mechanism (%4)").arg(
			        QString::fromLatin1(ci->encryption),
			        QString::fromLatin1(ci->message_authentication),
			        QString::fromLatin1(ci->key_exchange_verbose),
			        QString::fromLatin1(ci->rfc_name));
		}
	}
	if (cipherDescription.isEmpty()) {
		cipherDescription = tr("The connection is secured by the cipher suite that OpenSSL identifies as %1").arg(qsc.name());
	}

	QString cipherPFSInfo;
	if (ci) {
		if (ci->forward_secret) {
			cipherPFSInfo = tr("<p>The connection provides perfect forward secrecy</p>");
		} else {
			cipherPFSInfo = tr("<p>The connection does not provide perfect forward secrecy</p>");
		}
	}

	QString qsControl = tr(
	            "<h2>Control channel</h2>"
	            "<p>The connection uses %1</p>"
	            "%2"
	            "%3"
	            "<p>%4 ms average latency (%5 deviation)</p>"
	            "<p>Remote host %6 (port %7)</p>").arg(
	                  c->sessionProtocolString().toHtmlEscaped(),
	                  cipherDescription,
	                  cipherPFSInfo,
	                  QString::fromLatin1("%1").arg(boost::accumulators::mean(g.sh->accTCP), 0, 'f', 2),
	                  QString::fromLatin1("%1").arg(sqrt(boost::accumulators::variance(g.sh->accTCP)),0,'f',2),
	                  host.toHtmlEscaped(),
	                  QString::number(port));
	if (g.uiMaxUsers) {
		qsControl += tr("<p>Connected users: %1/%2</p>").arg(ModelItem::c_qhUsers.count()).arg(g.uiMaxUsers);
	}

	QString qsVoice, qsCrypt, qsAudio;

	if (NetworkConfig::TcpModeEnabled()) {
		qsVoice = tr("Voice channel is sent over control channel");
	} else {
		qsVoice = tr("<h2>Voice channel</h2><p>Encrypted with 128 bit OCB-AES128<br />%1 ms average latency (%4 deviation)</p>").arg(boost::accumulators::mean(g.sh->accUDP), 0, 'f', 2).arg(sqrt(boost::accumulators::variance(g.sh->accUDP)),0,'f',2);
		qsCrypt = QString::fromLatin1("<h2>%1</h2><table><tr><th></th><th>%2</th><th>%3</th></tr>"
		                              "<tr><th>%4</th><td>%8</td><td>%12</td></tr>"
		                              "<tr><th>%5</th><td>%9</td><td>%13</td></tr>"
		                              "<tr><th>%6</th><td>%10</td><td>%14</td></tr>"
		                              "<tr><th>%7</th><td>%11</td><td>%15</td></tr>"
		                              "</table>")
		          .arg(tr("UDP Statistics")).arg(tr("To Server")).arg(tr("From Server")).arg(tr("Good")).arg(tr("Late")).arg(tr("Lost")).arg(tr("Resync"))
		          .arg(cs.uiRemoteGood).arg(cs.uiRemoteLate).arg(cs.uiRemoteLost).arg(cs.uiRemoteResync)
		          .arg(cs.uiGood).arg(cs.uiLate).arg(cs.uiLost).arg(cs.uiResync);
	}
	qsAudio=tr("<h2>Audio bandwidth</h2><p>Maximum %1 kbit/s<br />Current %2 kbit/s<br />Codec: %3</p>").arg(g.iMaxBandwidth / 1000.0,0,'f',1).arg(g.iAudioBandwidth / 1000.0,0,'f',1).arg(currentCodec());

	QMessageBox qmb(QMessageBox::Information, tr("Mumble Server Information"), qsVersion + qsControl + qsVoice + qsCrypt + qsAudio, QMessageBox::Ok, this);
	qmb.setDefaultButton(QMessageBox::Ok);
	qmb.setEscapeButton(QMessageBox::Ok);

	QPushButton *qp = qmb.addButton(tr("&View Certificate"), QMessageBox::ActionRole);
	int res = qmb.exec();
	if ((res == 0) && (qmb.clickedButton() == qp)) {
		ViewCert vc(g.sh->qscCert, this);
		vc.exec();
	}
}

void MainWindow::on_qaServerTexture_triggered() {
	QPair<QByteArray, QImage> choice = openImageFile();
	if (choice.first.isEmpty())
		return;

	const QImage &img = choice.second;

	if ((img.height() <= 1024) && (img.width() <= 1024))
		g.sh->setUserTexture(g.uiSession, choice.first);
}

void MainWindow::on_qaServerTextureRemove_triggered() {
	g.sh->setUserTexture(g.uiSession, QByteArray());
}

void MainWindow::on_qaServerTokens_triggered() {
	if (tokenEdit) {
		tokenEdit->reject();
		delete tokenEdit;
		tokenEdit = NULL;
	}

	tokenEdit = new Tokens(this);
	tokenEdit->show();
}

void MainWindow::voiceRecorderDialog_finished(int) {
	voiceRecorderDialog->deleteLater();
	voiceRecorderDialog = NULL;
}

void MainWindow::qmUser_aboutToShow() {
	ClientUser *p = NULL;
	if (g.uiSession != 0) {
		QModelIndex idx;
		if (! qpContextPosition.isNull())
			idx = qtvUsers->indexAt(qpContextPosition);

		if (! idx.isValid())
			idx = qtvUsers->currentIndex();

		p = pmModel->getUser(idx);

		if (cuContextUser)
			p = cuContextUser.data();
	}

	cuContextUser = p;
	qpContextPosition = QPoint();

	bool self = p && (p->uiSession == g.uiSession);

	qmUser->clear();

	if (g.pPermissions & (ChanACL::Kick | ChanACL::Ban | ChanACL::Write))
		qmUser->addAction(qaUserKick);
	if (g.pPermissions & (ChanACL::Ban | ChanACL::Write))
		qmUser->addAction(qaUserBan);
	qmUser->addAction(qaUserMute);
	qmUser->addAction(qaUserDeaf);
	if (g.sh && g.sh->uiVersion >= 0x010203)
		qmUser->addAction(qaUserPrioritySpeaker);
	qmUser->addAction(qaUserLocalMute);
	qmUser->addAction(qaUserLocalIgnore);
	qmUser->addAction(qaUserLocalVolume);

	if (self)
		qmUser->addAction(qaSelfComment);
	else {
		qmUser->addAction(qaUserCommentView);
		qmUser->addAction(qaUserCommentReset);
		qmUser->addAction(qaUserTextureReset);
	}

	qmUser->addAction(qaUserTextMessage);
	if (g.sh && g.sh->uiVersion >= 0x010202)
		qmUser->addAction(qaUserInformation);

	if (p && (p->iId < 0) && ! p->qsHash.isEmpty() && (g.pPermissions & ((self ? ChanACL::SelfRegister : ChanACL::Register) | ChanACL::Write))) {
		qmUser->addSeparator();
		qmUser->addAction(qaUserRegister);
	}

	if (p && ! p->qsHash.isEmpty() && (!p->qsFriendName.isEmpty() || (p->uiSession != g.uiSession))) {
		qmUser->addSeparator();
		if (p->qsFriendName.isEmpty())
			qmUser->addAction(qaUserFriendAdd);
		else {
			if (p->qsFriendName != p->qsName)
				qmUser->addAction(qaUserFriendUpdate);
			qmUser->addAction(qaUserFriendRemove);
		}
	}

	if (self) {
		qmUser->addSeparator();
		qmUser->addAction(qaAudioMute);
		qmUser->addAction(qaAudioDeaf);
	}

#ifndef Q_OS_MAC
	if (g.s.bMinimalView) {
		qmUser->addSeparator();
		qmUser->addMenu(qmServer);
		qmUser->addMenu(qmSelf);
		qmUser->addMenu(qmConfig);
		qmUser->addMenu(qmHelp);
	}
#endif

	if (! qlUserActions.isEmpty()) {
		qmUser->addSeparator();
		foreach(QAction *a, qlUserActions)
			qmUser->addAction(a);
	}

	if (! p) {
		qaUserKick->setEnabled(false);
		qaUserBan->setEnabled(false);
		qaUserTextMessage->setEnabled(false);
		qaUserLocalMute->setEnabled(false);
		qaUserLocalVolume->setEnabled(false);
		qaUserLocalIgnore->setEnabled(false);
		qaUserCommentReset->setEnabled(false);
		qaUserTextureReset->setEnabled(false);
		qaUserCommentView->setEnabled(false);
	} else {
		qaUserKick->setEnabled(! self);
		qaUserBan->setEnabled(! self);
		qaUserTextMessage->setEnabled(true);
		qaUserLocalMute->setEnabled(! self);
		qaUserLocalVolume->setEnabled(! self);
		qaUserLocalIgnore->setEnabled(! self);
		qaUserCommentReset->setEnabled(! p->qbaCommentHash.isEmpty() && (g.pPermissions & (ChanACL::Move | ChanACL::Write)));
		qaUserTextureReset->setEnabled(! p->qbaTextureHash.isEmpty() && (g.pPermissions & (ChanACL::Move | ChanACL::Write)));
		qaUserCommentView->setEnabled(! p->qbaCommentHash.isEmpty());

		qaUserMute->setChecked(p->bMute || p->bSuppress);
		qaUserDeaf->setChecked(p->bDeaf);
		qaUserPrioritySpeaker->setChecked(p->bPrioritySpeaker);
		qaUserLocalMute->setChecked(p->bLocalMute);
		qaUserLocalIgnore->setChecked(p->bLocalIgnore);
	}
	updateMenuPermissions();
}

void MainWindow::qmListener_aboutToShow() {
	ClientUser *p = nullptr;
	if (g.uiSession != 0) {
		QModelIndex idx;
		if (! qpContextPosition.isNull())
			idx = qtvUsers->indexAt(qpContextPosition);

		if (! idx.isValid())
			idx = qtvUsers->currentIndex();

		p = pmModel->getUser(idx);

		if (cuContextUser)
			p = cuContextUser.data();
	}

	cuContextUser = p;
	qpContextPosition = QPoint();

	bool self = p && (p->uiSession == g.uiSession);

	qmListener->clear();

	if (self) {
		qmListener->addAction(qaListenerLocalVolume);
		if (cContextChannel) {
			qmListener->addAction(qaChannelListen);
			qaChannelListen->setChecked(ChannelListener::isListening(g.uiSession, cContextChannel->iId));
		}
	} else {
		qmListener->addAction(qaEmpty);
	}
}

void MainWindow::on_qaUserMute_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	MumbleProto::UserState mpus;
	mpus.set_session(p->uiSession);
	if (p->bMute || p->bSuppress) {
		if (p->bMute)
			mpus.set_mute(false);
		if (p->bSuppress)
			mpus.set_suppress(false);
	} else {
		mpus.set_mute(true);
	}
	g.sh->sendMessage(mpus);
}

void MainWindow::on_qaUserLocalMute_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	bool muted = qaUserLocalMute->isChecked();

	p->setLocalMute(muted);
	if (! p->qsHash.isEmpty())
		g.db->setLocalMuted(p->qsHash, muted);
}

void MainWindow::on_qaUserLocalIgnore_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	bool ignored = qaUserLocalIgnore->isChecked();

	p->setLocalIgnore(ignored);
	if (! p->qsHash.isEmpty())
		g.db->setLocalIgnored(p->qsHash, ignored);
}

void MainWindow::on_qaUserLocalVolume_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p) {
		return;
	}
	openUserLocalVolumeDialog(p);
}

void MainWindow::openUserLocalVolumeDialog(ClientUser *p) {
	unsigned int session = p->uiSession;
	UserLocalVolumeDialog::present(session, &qmUserVolTracker);
}

void MainWindow::on_qaUserDeaf_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	MumbleProto::UserState mpus;
	mpus.set_session(p->uiSession);
	mpus.set_deaf(! p->bDeaf);
	g.sh->sendMessage(mpus);
}

void MainWindow::on_qaSelfPrioritySpeaker_triggered() {
	ClientUser *p = ClientUser::get(g.uiSession);
	if (!p)
		return;

	MumbleProto::UserState mpus;
	mpus.set_session(p->uiSession);
	mpus.set_priority_speaker(! p->bPrioritySpeaker);
	g.sh->sendMessage(mpus);
}

void MainWindow::on_qaUserPrioritySpeaker_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	MumbleProto::UserState mpus;
	mpus.set_session(p->uiSession);
	mpus.set_priority_speaker(! p->bPrioritySpeaker);
	g.sh->sendMessage(mpus);
}

void MainWindow::on_qaUserRegister_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	unsigned int session = p->uiSession;

	QMessageBox::StandardButton result;

	if (session == g.uiSession)
		result = QMessageBox::question(this, tr("Register yourself as %1").arg(p->qsName), tr("<p>You are about to register yourself on this server. This action cannot be undone, and your username cannot be changed once this is done. You will forever be known as '%1' on this server.</p><p>Are you sure you want to register yourself?</p>").arg(p->qsName.toHtmlEscaped()), QMessageBox::Yes|QMessageBox::No);
	else
		result = QMessageBox::question(this, tr("Register user %1").arg(p->qsName), tr("<p>You are about to register %1 on the server. This action cannot be undone, the username cannot be changed, and as a registered user, %1 will have access to the server even if you change the server password.</p><p>From this point on, %1 will be authenticated with the certificate currently in use.</p><p>Are you sure you want to register %1?</p>").arg(p->qsName.toHtmlEscaped()), QMessageBox::Yes|QMessageBox::No);

	if (result == QMessageBox::Yes) {
		p = ClientUser::get(session);
		if (! p)
			return;
		g.sh->registerUser(p->uiSession);
	}
}

void MainWindow::on_qaUserFriendAdd_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	g.db->addFriend(p->qsName, p->qsHash);
	pmModel->setFriendName(p, p->qsName);
}

void MainWindow::on_qaUserFriendUpdate_triggered() {
	on_qaUserFriendAdd_triggered();
}

void MainWindow::on_qaUserFriendRemove_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	g.db->removeFriend(p->qsHash);
	pmModel->setFriendName(p, QString());
}

void MainWindow::on_qaUserKick_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	unsigned int session = p->uiSession;

	bool ok;
	QString reason = QInputDialog::getText(this, tr("Kicking user %1").arg(p->qsName), tr("Enter reason"), QLineEdit::Normal, QString(), &ok);

	p = ClientUser::get(session);
	if (!p)
		return;

	if (ok) {
		g.sh->kickBanUser(p->uiSession, reason, false);
	}
}

void MainWindow::on_qaUserBan_triggered() {
	ClientUser *p = getContextMenuUser();
	if (!p)
		return;

	unsigned int session = p->uiSession;

	bool ok;
	QString reason = QInputDialog::getText(this, tr("Banning user %1").arg(p->qsName), tr("Enter reason"), QLineEdit::Normal, QString(), &ok);
	p = ClientUser::get(session);
	if (!p)
		return;

	if (ok) {
		g.sh->kickBanUser(p->uiSession, reason, true);
	}
}

void MainWindow::on_qaUserTextMessage_triggered() {
	ClientUser *p = getContextMenuUser();

	if (!p)
		return;

	openTextMessageDialog(p);
}

void MainWindow::openTextMessageDialog(ClientUser *p) {
	unsigned int session = p->uiSession;

	::TextMessage *texm = new ::TextMessage(this, tr("Sending message to %1").arg(p->qsName));
	int res = texm->exec();

	// Try to get find the user using the session id.
	// This will return NULL if the user disconnected while typing the message.
	p = ClientUser::get(session);

	if (p && (res == QDialog::Accepted)) {
		QString msg = texm->message();

		if (! msg.isEmpty()) {
			g.sh->sendUserTextMessage(p->uiSession, msg);
			g.l->log(Log::TextMessage, tr("To %1: %2").arg(Log::formatClientUser(p, Log::Target), texm->message()), tr("Message to %1").arg(p->qsName), true);
		}
	}
	delete texm;
}

void MainWindow::on_qaUserCommentView_triggered() {
	ClientUser *p = getContextMenuUser();
	// This has to be done here because UserModel could've set it.
	cuContextUser.clear();

	if (!p)
		return;

	if (! p->qbaCommentHash.isEmpty() && p->qsComment.isEmpty()) {
		p->qsComment = QString::fromUtf8(g.db->blob(p->qbaCommentHash));
		if (p->qsComment.isEmpty()) {
			pmModel->uiSessionComment = ~(p->uiSession);
			MumbleProto::RequestBlob mprb;
			mprb.add_session_comment(p->uiSession);
			g.sh->sendMessage(mprb);
			return;
		}
	}

	pmModel->seenComment(pmModel->index(p));

	::TextMessage *texm = new ::TextMessage(this, tr("View comment on user %1").arg(p->qsName));

	texm->rteMessage->setText(p->qsComment, true);
	texm->setAttribute(Qt::WA_DeleteOnClose, true);
	texm->show();
}

void MainWindow::on_qaUserCommentReset_triggered() {
	ClientUser *p = getContextMenuUser();

	if (!p)
		return;

	unsigned int session = p->uiSession;

	int ret = QMessageBox::question(this, QLatin1String("Mumble"),
	                                tr("Are you sure you want to reset the comment of user %1?").arg(p->qsName.toHtmlEscaped()),
	                                QMessageBox::Yes, QMessageBox::No);
	if (ret == QMessageBox::Yes) {
		g.sh->setUserComment(session, QString());
	}
}

void MainWindow::on_qaUserTextureReset_triggered() {
	ClientUser *p = getContextMenuUser();

	if (!p)
		return;

	unsigned int session = p->uiSession;

	int ret = QMessageBox::question(this, QLatin1String("Mumble"),
	                                tr("Are you sure you want to reset the avatar of user %1?").arg(p->qsName.toHtmlEscaped()),
	                                QMessageBox::Yes, QMessageBox::No);
	if (ret == QMessageBox::Yes) {
		g.sh->setUserTexture(session, QByteArray());
	}
}

void MainWindow::on_qaUserInformation_triggered() {
	ClientUser *p = getContextMenuUser();

	if (!p)
		return;

	g.sh->requestUserStats(p->uiSession, false);
}

void MainWindow::on_qaHide_triggered() {
	hide();
}

void MainWindow::on_qaQuit_triggered() {
	bSuppressAskOnQuit = true;
	this->close();
}

void MainWindow::sendChatbarMessage(QString qsText) {
	if (g.uiSession == 0) return; // Check if text & connection is available

	ClientUser *p = pmModel->getUser(qtvUsers->currentIndex());
	Channel *c = pmModel->getChannel(qtvUsers->currentIndex());

	qsText = qsText.toHtmlEscaped();
	qsText = TextMessage::autoFormat(qsText);

	if (!g.s.bChatBarUseSelection || p == NULL || p->uiSession == g.uiSession) {
		// Channel message
		if (!g.s.bChatBarUseSelection || c == NULL) // If no channel selected fallback to current one
			c = ClientUser::get(g.uiSession)->cChannel;

		g.sh->sendChannelTextMessage(c->iId, qsText, false);
		g.l->log(Log::TextMessage, tr("To %1: %2").arg(Log::formatChannel(c), qsText), tr("Message to channel %1").arg(c->qsName), true);
	} else {
		// User message
		g.sh->sendUserTextMessage(p->uiSession, qsText);
		g.l->log(Log::TextMessage, tr("To %1: %2").arg(Log::formatClientUser(p, Log::Target), qsText), tr("Message to %1").arg(p->qsName), true);
	}

	qteChat->clear();
}

/**
 * Controlls tab username completion for the chatbar.
 * @see ChatbarLineEdit::completeAtCursor()
 */
void MainWindow::on_qteChat_tabPressed() {
	qteChat->completeAtCursor();
}

/// Handles Backtab/Shift-Tab for qteChat, which allows
/// users to move focus to the previous widget in
/// MainWindow.
void MainWindow::on_qteChat_backtabPressed() {
	focusPreviousChild();
}

/**
 * Controlls ctrl space username completion and selection for the chatbar.
 * @see ChatbarLineEdit::completeAtCursor()
 */
void MainWindow::on_qteChat_ctrlSpacePressed() {
	unsigned int res = qteChat->completeAtCursor();
	if (res == 0) return;
	qtvUsers->setCurrentIndex(pmModel->index(ClientUser::get(res)));
}

void MainWindow::on_qmConfig_aboutToShow() {
	// Don't remove the config, as that messes up OSX.
	foreach(QAction *a, qmConfig->actions())
		if (a != qaConfigDialog)
			qmConfig->removeAction(a);
	qmConfig->addAction(qaAudioWizard);
	qmConfig->addAction(qaConfigCert);
	qmConfig->addSeparator();
	qmConfig->addAction(qaAudioTTS);
	qmConfig->addSeparator();
	qmConfig->addAction(qaConfigMinimal);
	if (g.s.bMinimalView)
		qmConfig->addAction(qaConfigHideFrame);
}

void MainWindow::qmChannel_aboutToShow() {
	qmChannel->clear();

	Channel *c = NULL;
	if (g.uiSession != 0) {
		QModelIndex idx;
		if (! qpContextPosition.isNull())
			idx = qtvUsers->indexAt(qpContextPosition);

		if (! idx.isValid())
			idx = qtvUsers->currentIndex();

		c = pmModel->getChannel(idx);

		if (cContextChannel)
			c = cContextChannel.data();
	}

	cContextChannel = c;
	qpContextPosition = QPoint();

	if (c && c->iId != ClientUser::get(g.uiSession)->cChannel->iId) {
		qmChannel->addAction(qaChannelJoin);

		if (g.sh->uiVersion >= 0x010400) {
			// If the server's version is less than 1.4, the listening feature is not supported yet
			// and thus it doesn't make sense to show the action for it
			qmChannel->addAction(qaChannelListen);
			qaChannelListen->setChecked(ChannelListener::isListening(g.uiSession, c->iId));
		}

		qmChannel->addSeparator();
	}

	qmChannel->addAction(qaChannelAdd);
	qmChannel->addAction(qaChannelACL);
	qmChannel->addAction(qaChannelRemove);
	qmChannel->addSeparator();
	qmChannel->addAction(qaChannelLink);
	qmChannel->addAction(qaChannelUnlink);
	qmChannel->addAction(qaChannelUnlinkAll);
	qmChannel->addSeparator();
	qmChannel->addAction(qaChannelCopyURL);
	qmChannel->addAction(qaChannelSendMessage);

	// hiding the root is nonsense
	if(c && c->cParent) {
		qmChannel->addSeparator();
		qmChannel->addAction(qaChannelFilter);
	}

#ifndef Q_OS_MAC
	if (g.s.bMinimalView) {
		qmChannel->addSeparator();
		qmChannel->addMenu(qmServer);
		qmChannel->addMenu(qmSelf);
		qmChannel->addMenu(qmConfig);
		qmChannel->addMenu(qmHelp);
	}
#endif

	if (! qlChannelActions.isEmpty()) {
		qmChannel->addSeparator();
		foreach(QAction *a, qlChannelActions)
			qmChannel->addAction(a);
	}

	bool add, remove, acl, link, unlink, unlinkall, msg;
	add = remove = acl = link = unlink = unlinkall = msg = false;

	if (g.uiSession != 0) {
		add = true;
		acl = true;
		msg = true;

		Channel *home = ClientUser::get(g.uiSession)->cChannel;

		if (c && c->iId != 0) {
			remove = true;
		}
		if (! c)
			c = Channel::get(0);
		unlinkall = (home->qhLinks.count() > 0);
		if (home != c) {
			if (c->allLinks().contains(home))
				unlink = true;
			else
				link = true;
		}
	}

	if(c)
		qaChannelFilter->setChecked(c->bFiltered);

	qaChannelAdd->setEnabled(add);
	qaChannelRemove->setEnabled(remove);
	qaChannelACL->setEnabled(acl);
	qaChannelLink->setEnabled(link);
	qaChannelUnlink->setEnabled(unlink);
	qaChannelUnlinkAll->setEnabled(unlinkall);
	qaChannelSendMessage->setEnabled(msg);
	updateMenuPermissions();
}

void MainWindow::on_qaChannelJoin_triggered() {
	Channel *c = getContextMenuChannel();

	if (c) {
		g.sh->joinChannel(g.uiSession, c->iId);
	}
}

void MainWindow::on_qaChannelListen_triggered() {
	Channel *c = getContextMenuChannel();

	if (c) {
		if (qaChannelListen->isChecked()) {
			g.sh->startListeningToChannel(c->iId);
		} else {
			g.sh->stopListeningToChannel(c->iId);
		}
	}
}

void MainWindow::on_qaChannelFilter_triggered() {
	Channel *c = getContextMenuChannel();
	
	if (c) {
		UserModel *um = static_cast<UserModel *>(qtvUsers->model());
		um->toggleChannelFiltered(c);
	}
}

void MainWindow::on_qaChannelAdd_triggered() {
	Channel *c = getContextMenuChannel();
	if (aclEdit) {
		aclEdit->reject();
		delete aclEdit;
		aclEdit = NULL;
	}

	aclEdit = new ACLEditor(c ? c->iId : 0, this);
	if (c && (c->uiPermissions & ChanACL::Cached) && !(c->uiPermissions & (ChanACL::Write | ChanACL::MakeChannel))) {
		aclEdit->qcbChannelTemporary->setEnabled(false);
		aclEdit->qcbChannelTemporary->setChecked(true);
	}

	aclEdit->show();
}

void MainWindow::on_qaChannelRemove_triggered() {
	int ret;
	Channel *c = getContextMenuChannel();
	if (! c)
		return;

	int id = c->iId;

	ret=QMessageBox::question(this, QLatin1String("Mumble"), tr("Are you sure you want to delete %1 and all its sub-channels?").arg(c->qsName.toHtmlEscaped()), QMessageBox::Yes, QMessageBox::No);

	c = Channel::get(id);
	if (!c)
		return;

	if (ret == QMessageBox::Yes) {
		g.sh->removeChannel(c->iId);
	}
}

void MainWindow::on_qaChannelACL_triggered() {
	Channel *c = getContextMenuChannel();
	if (! c)
		c = Channel::get(0);
	int id = c->iId;

	if (! c->qbaDescHash.isEmpty() && c->qsDesc.isEmpty()) {
		c->qsDesc = QString::fromUtf8(g.db->blob(c->qbaDescHash));
		if (c->qsDesc.isEmpty()) {
			MumbleProto::RequestBlob mprb;
			mprb.add_channel_description(id);
			g.sh->sendMessage(mprb);
		}
	}

	g.sh->requestACL(id);

	if (aclEdit) {
		aclEdit->reject();
		delete aclEdit;
		aclEdit = NULL;
	}
}

void MainWindow::on_qaChannelLink_triggered() {
	Channel *c = ClientUser::get(g.uiSession)->cChannel;
	Channel *l = getContextMenuChannel();
	if (! l)
		l = Channel::get(0);

	g.sh->addChannelLink(c->iId, l->iId);
}

void MainWindow::on_qaChannelUnlink_triggered() {
	Channel *c = ClientUser::get(g.uiSession)->cChannel;
	Channel *l = getContextMenuChannel();
	if (! l)
		l = Channel::get(0);

	g.sh->removeChannelLink(c->iId, l->iId);
}

void MainWindow::on_qaChannelUnlinkAll_triggered() {
	Channel *c = ClientUser::get(g.uiSession)->cChannel;

	MumbleProto::ChannelState mpcs;
	mpcs.set_channel_id(c->iId);
	foreach(Channel *l, c->qsPermLinks)
		mpcs.add_links_remove(l->iId);
	g.sh->sendMessage(mpcs);
}

void MainWindow::on_qaChannelSendMessage_triggered() {
	Channel *c = getContextMenuChannel();

	if (!c)
		return;

	int id = c->iId;

	::TextMessage *texm = new ::TextMessage(this, tr("Sending message to channel %1").arg(c->qsName), true);
	int res = texm->exec();

	c = Channel::get(id);

	if (c && (res==QDialog::Accepted)) {
		g.sh->sendChannelTextMessage(id, texm->message(), texm->bTreeMessage);

		if (texm->bTreeMessage)
			g.l->log(Log::TextMessage, tr("To %1 (Tree): %2").arg(Log::formatChannel(c), texm->message()), tr("Message to tree %1").arg(c->qsName), true);
		else
			g.l->log(Log::TextMessage, tr("To %1: %2").arg(Log::formatChannel(c), texm->message()), tr("Message to channel %1").arg(c->qsName), true);
	}
	delete texm;
}

void MainWindow::on_qaChannelCopyURL_triggered() {
	Channel *c = getContextMenuChannel();
	QString host, uname, pw, channel;
	unsigned short port;

	if (!c)
		return;

	g.sh->getConnectionInfo(host, port, uname, pw);
	// walk back up the channel list to build the URL.
	while (c->cParent != NULL) {
		channel.prepend(c->qsName);
		channel.prepend(QLatin1String("/"));
		c = c->cParent;
	}

	QApplication::clipboard()->setMimeData(ServerItem::toMimeData(c->qsName, host, port, channel), QClipboard::Clipboard);
}

void MainWindow::on_qaListenerLocalVolume_triggered() {
	Channel *channel = getContextMenuChannel();
	ClientUser *user = getContextMenuUser();

	if (!channel || !user) {
		return;
	}

	ListenerLocalVolumeDialog dialog(user, channel);	
	dialog.exec();
}

/**
 * This function updates the UI according to the permission of the user in the current channel.
 * If possible the permissions are fetched from a cache. Otherwise they are requested by the server
 * via a PermissionQuery call (whose reply updates the cache and calls this function again).
 * @see MainWindow::msgPermissionQuery(const MumbleProto::PermissionQuery &msg)
 */
void MainWindow::updateMenuPermissions() {
	ClientUser *cu = NULL;
	Channel *c = NULL;

	if (g.uiSession) {
		cu = getContextMenuUser();
		if (!cu)
			cu = pmModel->getUser(qtvUsers->currentIndex());

		c = cu ? cu->cChannel : getContextMenuChannel();
		if (!c)
			c = pmModel->getChannel(qtvUsers->currentIndex());
	}

	ChanACL::Permissions p = c ? static_cast<ChanACL::Permissions>(c->uiPermissions) : ChanACL::None;

	if (c && ! p) {
		g.sh->requestChannelPermissions(c->iId);
		if (c->iId == 0)
			p = g.pPermissions;
		else
			p = ChanACL::All;

		c->uiPermissions = p;
	}

	Channel *cparent = c ? c->cParent : NULL;
	ChanACL::Permissions pparent = cparent ? static_cast<ChanACL::Permissions>(cparent->uiPermissions) : ChanACL::None;

	if (cparent && ! pparent) {
		g.sh->requestChannelPermissions(cparent->iId);
		if (cparent->iId == 0)
			pparent = g.pPermissions;
		else
			pparent = ChanACL::All;

		cparent->uiPermissions = pparent;
	}

	ClientUser *user = g.uiSession ? ClientUser::get(g.uiSession) : NULL;
	Channel *homec = user ? user->cChannel : NULL;
	ChanACL::Permissions homep = homec ? static_cast<ChanACL::Permissions>(homec->uiPermissions) : ChanACL::None;

	if (homec && ! homep) {
		g.sh->requestChannelPermissions(homec->iId);
		if (homec->iId == 0)
			homep = g.pPermissions;
		else
			homep = ChanACL::All;

		homec->uiPermissions = homep;
	}

	if (cu) {
		qaUserMute->setEnabled(p & (ChanACL::Write | ChanACL::MuteDeafen) && ((cu != user) || cu->bMute || cu->bSuppress));
		qaUserDeaf->setEnabled(p & (ChanACL::Write | ChanACL::MuteDeafen) && ((cu != user) || cu->bDeaf));
		qaUserPrioritySpeaker->setEnabled(p & (ChanACL::Write | ChanACL::MuteDeafen));
		qaUserTextMessage->setEnabled(p & (ChanACL::Write | ChanACL::TextMessage));
		qaUserInformation->setEnabled((g.pPermissions & (ChanACL::Write | ChanACL::Register)) || (p & (ChanACL::Write | ChanACL::Enter)) || (cu == user));
	} else {
		qaUserMute->setEnabled(false);
		qaUserDeaf->setEnabled(false);
		qaUserPrioritySpeaker->setEnabled(false);
		qaUserTextMessage->setEnabled(false);
		qaUserInformation->setEnabled(false);
	}

	qaChannelJoin->setEnabled(p & (ChanACL::Write | ChanACL::Enter));

	qaChannelAdd->setEnabled(p & (ChanACL::Write | ChanACL::MakeChannel | ChanACL::MakeTempChannel));
	qaChannelRemove->setEnabled(p & ChanACL::Write);
	qaChannelACL->setEnabled((p & ChanACL::Write) || (pparent & ChanACL::Write));

	qaChannelLink->setEnabled((p & (ChanACL::Write | ChanACL::LinkChannel)) && (homep & (ChanACL::Write | ChanACL::LinkChannel)));
	qaChannelUnlink->setEnabled((p & (ChanACL::Write | ChanACL::LinkChannel)) || (homep & (ChanACL::Write | ChanACL::LinkChannel)));
	qaChannelUnlinkAll->setEnabled(p & (ChanACL::Write | ChanACL::LinkChannel));

	qaChannelCopyURL->setEnabled(c);
	qaChannelSendMessage->setEnabled(p & (ChanACL::Write | ChanACL::TextMessage));
	qaChannelFilter->setEnabled(true);
	qteChat->setEnabled(p & (ChanACL::Write | ChanACL::TextMessage));
}

void MainWindow::userStateChanged() {
	if (g.s.bStateInTray) {
		updateTrayIcon();
	}
	
	ClientUser *user = ClientUser::get(g.uiSession);
	if (user == NULL) {
		g.bAttenuateOthers = false;
		g.prioritySpeakerActiveOverride = false;
		
		return;
	}

	switch (user->tsState) {
		case Settings::Talking:
		case Settings::Whispering:
		case Settings::Shouting:
			g.bAttenuateOthers = g.s.bAttenuateOthersOnTalk;

			g.prioritySpeakerActiveOverride =
			        g.s.bAttenuateUsersOnPrioritySpeak
			        && user->bPrioritySpeaker;
			
			break;
		case Settings::Passive:
		default:
			g.bAttenuateOthers = false;
			g.prioritySpeakerActiveOverride = false;
			break;
	}
}

void MainWindow::on_qaAudioReset_triggered() {
	AudioInputPtr ai = g.ai;
	if (ai)
		ai->bResetProcessor = true;
}

void MainWindow::on_qaFilterToggle_triggered() {	
	g.s.bFilterActive = qaFilterToggle->isChecked();
	updateUserModel();
}

void MainWindow::on_qaAudioMute_triggered() {
	if (g.bInAudioWizard) {
		qaAudioMute->setChecked(!qaAudioMute->isChecked());
		return;
	}

	AudioInputPtr ai = g.ai;
	if (ai)
		ai->tIdle.restart();

	g.s.bMute = qaAudioMute->isChecked();

	if (! g.s.bMute && g.s.bDeaf) {
		g.s.bDeaf = false;
		qaAudioDeaf->setChecked(false);
		g.l->log(Log::SelfUndeaf, tr("Unmuted and undeafened."));
	} else if (! g.s.bMute) {
		g.l->log(Log::SelfUnmute, tr("Unmuted."));
	} else {
		g.l->log(Log::SelfMute, tr("Muted."));
	}

	if (g.sh) {
		g.sh->setSelfMuteDeafState(g.s.bMute, g.s.bDeaf);
	}

	onChangeMute();
	updateTrayIcon();
}

void MainWindow::on_qaAudioDeaf_triggered() {
	if (g.bInAudioWizard) {
		qaAudioDeaf->setChecked(!qaAudioDeaf->isChecked());
		return;
	}

	if (! qaAudioDeaf->isChecked() && bAutoUnmute) {
		qaAudioDeaf->setChecked(true);
		qaAudioMute->setChecked(false);
		on_qaAudioMute_triggered();
		return;
	}
	AudioInputPtr ai = g.ai;
	if (ai)
		ai->tIdle.restart();

	g.s.bDeaf = qaAudioDeaf->isChecked();
	if (g.s.bDeaf && ! g.s.bMute) {
		bAutoUnmute = true;
		g.s.bMute = true;
		qaAudioMute->setChecked(true);
		g.l->log(Log::SelfDeaf, tr("Muted and deafened."));
	} else if (g.s.bDeaf) {
		g.l->log(Log::SelfDeaf, tr("Deafened."));
		bAutoUnmute = false;
	} else {
		g.l->log(Log::SelfUndeaf, tr("Undeafened."));
	}

	if (g.sh) {
		g.sh->setSelfMuteDeafState(g.s.bMute, g.s.bDeaf);
	}

	onChangeMute();
	updateTrayIcon();
}

void MainWindow::on_qaRecording_triggered() {
	if (voiceRecorderDialog) {
		voiceRecorderDialog->show();
		voiceRecorderDialog->raise();
		voiceRecorderDialog->activateWindow();
	} else {
		voiceRecorderDialog = new VoiceRecorderDialog(this);
		connect(voiceRecorderDialog, SIGNAL(finished(int)), this, SLOT(voiceRecorderDialog_finished(int)));
		voiceRecorderDialog->show();
	}
}

void MainWindow::on_qaAudioTTS_triggered() {
	g.s.bTTS = qaAudioTTS->isChecked();
}

void MainWindow::on_qaAudioStats_triggered() {
	AudioStats *as=new AudioStats(this);
	as->show();
}

void MainWindow::on_qaAudioUnlink_triggered() {
	g.p->bUnlink = true;
}

void MainWindow::on_qaConfigDialog_triggered() {
	QDialog *dlg = new ConfigDialog(this);

	if (dlg->exec() == QDialog::Accepted) {
		setupView(false);
		updateTransmitModeComboBox();
		updateTrayIcon();
		updateUserModel();
		
		if (g.s.requireRestartToApply) {
			if (g.s.requireRestartToApply && QMessageBox::question(
				        this,
				        tr("Restart Mumble?"),
				        tr("Some settings will only apply after a restart of Mumble. Restart Mumble now?"),
				        QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
		
				bSuppressAskOnQuit = true;
				restartOnQuit = true;
				
				close();
			}
		}
	}

	delete dlg;
}

void MainWindow::on_qaConfigMinimal_triggered() {
	g.s.bMinimalView = qaConfigMinimal->isChecked();
	updateWindowTitle();
	setupView();
}

void MainWindow::on_qaConfigHideFrame_triggered() {
	g.s.bHideFrame = qaConfigHideFrame->isChecked();
	setupView(false);
}

void MainWindow::on_qaConfigCert_triggered() {
	CertWizard *cw = new CertWizard(this);
	cw->exec();
	delete cw;
}

void MainWindow::on_qaAudioWizard_triggered() {
	AudioWizard *aw = new AudioWizard(this);
	aw->exec();
	delete aw;
}

void MainWindow::on_qaDeveloperConsole_triggered() {
	g.c->show();
}

void MainWindow::on_qaHelpWhatsThis_triggered() {
	QWhatsThis::enterWhatsThisMode();
}

void MainWindow::on_qaHelpAbout_triggered() {
	AboutDialog adAbout(this);
	adAbout.exec();
}

void MainWindow::on_qaHelpAboutQt_triggered() {
	QMessageBox::aboutQt(this, tr("About Qt"));
}

void MainWindow::on_qaHelpVersionCheck_triggered() {
	new VersionCheck(false, this);
}

void MainWindow::on_gsMuteSelf_down(QVariant v) {
	int val = v.toInt();
	if (
	    ((val > 0) && ! g.s.bMute) ||
	    ((val < 0) && g.s.bMute) ||
	    (val == 0)
	) {
		qaAudioMute->setChecked(! qaAudioMute->isChecked());
		on_qaAudioMute_triggered();
	}
}

void MainWindow::on_gsDeafSelf_down(QVariant v) {
	int val = v.toInt();
	if (
	    ((val > 0) && ! g.s.bDeaf) ||
	    ((val < 0) && g.s.bDeaf) ||
	    (val == 0)
	) {
		qaAudioDeaf->setChecked(! qaAudioDeaf->isChecked());
		on_qaAudioDeaf_triggered();
	}
}

void MainWindow::on_PushToTalk_triggered(bool down, QVariant) {
	g.iPrevTarget = 0;
	if (down) {
		g.uiDoublePush = g.tDoublePush.restart();
		g.iPushToTalk++;
	} else if (g.iPushToTalk > 0) {
		QTimer::singleShot(static_cast<int>(g.s.pttHold), this, SLOT(pttReleased()));
	}
}

void MainWindow::pttReleased() {
	if (g.iPushToTalk > 0) {
		g.iPushToTalk--;
	}
}

void MainWindow::on_PushToMute_triggered(bool down, QVariant) {
	g.bPushToMute = down;
	updateTrayIcon();
	updateUserModel();
}

void MainWindow::on_VolumeUp_triggered(bool down, QVariant) {
	if (down) {
		float vol = g.s.fVolume + 0.1f;
		if (vol > 2.0f) {
			vol = 2.0f;
		}
		g.s.fVolume = vol;
	}
}

void MainWindow::on_VolumeDown_triggered(bool down, QVariant) {
	if (down) {
		float vol = g.s.fVolume - 0.1f;
		if (vol < 0.0f) {
			vol = 0.0f;
		}
		g.s.fVolume = vol;
	}
}

Channel *MainWindow::mapChannel(int idx) const {
	if (! g.uiSession)
		return NULL;

	Channel *c = NULL;

	if (idx < 0) {
		switch (idx) {
			case SHORTCUT_TARGET_ROOT:
				c = Channel::get(0);
				break;
			case SHORTCUT_TARGET_PARENT:
			case SHORTCUT_TARGET_CURRENT:
				c = ClientUser::get(g.uiSession)->cChannel;
				if (idx == SHORTCUT_TARGET_PARENT)
					c = c->cParent;
				break;
			default:
				if(idx <= SHORTCUT_TARGET_PARENT_SUBCHANNEL)
					c = pmModel->getSubChannel(ClientUser::get(g.uiSession)->cChannel->cParent, SHORTCUT_TARGET_PARENT_SUBCHANNEL - idx);
				else
					c = pmModel->getSubChannel(ClientUser::get(g.uiSession)->cChannel, SHORTCUT_TARGET_SUBCHANNEL - idx);
				break;
		}
	} else {
		c = Channel::get(idx);
	}
	return c;
}

void MainWindow::updateTarget() {
	g.iPrevTarget = g.iTarget;

	if (qmCurrentTargets.isEmpty()) {
		g.bCenterPosition = false;
		g.iTarget = 0;
	} else {
		bool center = false;
		QList<ShortcutTarget> ql;
		foreach(const ShortcutTarget &st, qmCurrentTargets.keys()) {
			ShortcutTarget nt;
			center = center || st.bForceCenter;
			nt.bUsers = st.bUsers;
			nt.bCurrentSelection = st.bCurrentSelection;

			if (nt.bCurrentSelection) {
				Channel *c = pmModel->getSelectedChannel();
				if (c) {
					nt.bUsers = false;
					nt.iChannel = c->iId;
					nt.bLinks = st.bLinks;
					nt.bChildren = st.bChildren;

					ql << nt;
				} else {
					ClientUser *user = pmModel->getSelectedUser();

					if (user) {
						nt.bUsers = true;
						nt.qlSessions << user->uiSession;

						ql << nt;
					}
				}
			} else if (st.bUsers) {
				foreach(const QString &hash, st.qlUsers) {
					ClientUser *p = pmModel->getUser(hash);
					if (p)
						nt.qlSessions.append(p->uiSession);
				}
				if (! nt.qlSessions.isEmpty())
					ql << nt;
			} else {
				Channel *c = mapChannel(st.iChannel);
				if (c) {
					nt.bLinks = st.bLinks;
					nt.bChildren = st.bChildren;
					nt.iChannel = c->iId;
					nt.qsGroup = st.qsGroup;
					ql << nt;
				}
			}
		}
		if (ql.isEmpty()) {
			g.iTarget = -1;
		} else {
			++iTargetCounter;

			int idx = qmTargets.value(ql);
			if (idx == 0) {
				// An idx of 0 means that we don't have a mapping for this shortcut yet
				// Thus we'll register it here
				QMap<int, int> qm;
				QMap<int, int>::const_iterator i;
				// We reverse the qmTargetsUse map into qm so that each key becomes a value and vice versa
				for (i=qmTargetUse.constBegin(); i != qmTargetUse.constEnd(); ++i) {
					qm.insert(i.value(), i.key());
				}

				// The reversal and the promise that when iterating over a QMap, the keys will appear sorted
				// leads to us now being able to get the next target ID as the value of the first entry in
				// the map.
				i = qm.constBegin();
				idx = i.value();



				// Sets up a VoiceTarget (which is identified by the targetID idx) on the server for the given set
				// of ShortcutTargets
				MumbleProto::VoiceTarget mpvt;
				mpvt.set_id(idx);

				foreach(const ShortcutTarget &st, ql) {
					MumbleProto::VoiceTarget_Target *t = mpvt.add_targets();
					// st.bCurrentSelection has been taken care of at this point already (if it was set) so
					// we don't have to check for that here.
					if (st.bUsers) {
						foreach(unsigned int uisession, st.qlSessions)
							t->add_session(uisession);
					} else {
						t->set_channel_id(st.iChannel);
						if (st.bChildren)
							t->set_children(true);
						if (st.bLinks)
							t->set_links(true);
						if (! st.qsGroup.isEmpty())
							t->set_group(u8(st.qsGroup));
					}
				}
				g.sh->sendMessage(mpvt);

				// Store a mapping of the list of ShortcutTargets and the used targetID
				qmTargets.insert(ql, idx);

				// Advance the iteration of qm (which contains the reverse mapping of qmTargetUse) by two.
				// Note that qmTargetUse is first populated in Messages.cpp so we will not overflow the map
				// by this.
				++i;
				++i;

				// Get the target ID for the targetID after next
				int oldidx = i.value();
				if (oldidx) {
					QHash<QList<ShortcutTarget>, int>::iterator mi;
					for (mi = qmTargets.begin(); mi != qmTargets.end(); ++mi) {
						if (mi.value() == oldidx) {
							// If we have used the targetID after next before, we clear the VoiceTarget for that
							// targetID on the server in order to be able to reuse that ID once we need it. We do
							// it 2 steps in advance as to not run into timing problems where the server might
							// receive this clearing message too late for us to recycle the ID.
							qmTargets.erase(mi);

							mpvt.Clear();
							mpvt.set_id(oldidx);
							g.sh->sendMessage(mpvt);

							break;
						}
					}
				}
			}

			// This is where the magic happens. We replace the old value the used targetID was mapped to with
			// iTargetCounter. iTargetCounter is guaranteed to be bigger than any number a targetID is currently
			// mapped to in this map. This causes the mapping for the most recently used targetID to appear last
			// in the qm map the next time this function gets called. This causes targetIDs to be sorted according
			// to the time they have been assigned for the last time so that the targetID that comes last in qm will
			// be the one that has been assigned most recently. This trick turns qmTargetUse (or rather qm) into
			// something similar to a RingBuffer inside this method.
			qmTargetUse.insert(idx, iTargetCounter);
			g.bCenterPosition = center;
			g.iTarget = idx;
		}
	}
}

void MainWindow::on_gsWhisper_triggered(bool down, QVariant scdata) {
	ShortcutTarget st = scdata.value<ShortcutTarget>();

	if (down) {
		if (gsJoinChannel->active()) {
			if (! st.bUsers) {
				Channel *c = mapChannel(st.iChannel);
				if (c) {
					g.sh->joinChannel(g.uiSession, c->iId);
				}
				return;
			}
		}

		if (gsLinkChannel->active()) {
			if (! st.bUsers) {
				Channel *c = ClientUser::get(g.uiSession)->cChannel;
				Channel *l = mapChannel(st.iChannel);
				if (l) {
					if (c->qsPermLinks.contains(l)) {
						g.sh->removeChannelLink(c->iId, l->iId);
					} else {
						g.sh->addChannelLink(c->iId, l->iId);
					}
				}
				return;
			}
		}

		addTarget(&st);
		updateTarget();

		g.iPushToTalk++;
	} else if (g.iPushToTalk > 0) {
		SignalCurry *fwd = new SignalCurry(scdata, true, this);
		connect(fwd, SIGNAL(called(QVariant)), SLOT(whisperReleased(QVariant)));
		QTimer::singleShot(static_cast<int>(g.s.pttHold), fwd, SLOT(call()));
	}
}

/* Add and remove ShortcutTargets from the qmCurrentTargets Map, which counts
 * the number of push-to-talk events for a given ShortcutTarget.  If this number
 * reaches 0, the ShortcutTarget is removed from qmCurrentTargets.
 */
void MainWindow::addTarget(ShortcutTarget *st)
{
	if (qmCurrentTargets.contains(*st))
		qmCurrentTargets[*st] += 1;
	else
		qmCurrentTargets[*st] = 1;
}

void MainWindow::removeTarget(ShortcutTarget *st)
{
	if (!qmCurrentTargets.contains(*st))
		return;

	if (qmCurrentTargets[*st] == 1)
		qmCurrentTargets.remove(*st);
	else
		qmCurrentTargets[*st] -= 1;
}

void MainWindow::on_gsCycleTransmitMode_triggered(bool down, QVariant)
{
	if (down) 
	{
		QString qsNewMode;

		switch (g.s.atTransmit)
		{
			case Settings::Continuous:
				g.s.atTransmit = Settings::VAD;
				g.l->log(Log::Information, tr("Transmit Mode set to Voice Activity"));
				break;
			case Settings::VAD:
				g.s.atTransmit = Settings::PushToTalk;
				g.l->log(Log::Information, tr("Transmit Mode set to Push-to-Talk"));
				break;
			case Settings::PushToTalk:
				g.s.atTransmit = Settings::Continuous;
				g.l->log(Log::Information, tr("Transmit Mode set to Continuous"));
				break;
		}
	}

	updateTransmitModeComboBox();
}

void MainWindow::on_gsTransmitModePushToTalk_triggered(bool down, QVariant)
{
	if (down) {
		g.s.atTransmit = Settings::PushToTalk;
		g.l->log(Log::Information, tr("Transmit Mode set to Push-to-Talk"));
	}

	updateTransmitModeComboBox();
}

void MainWindow::on_gsTransmitModeContinuous_triggered(bool down, QVariant)
{
	if (down) {
		g.s.atTransmit = Settings::Continuous;
		g.l->log(Log::Information, tr("Transmit Mode set to Continuous"));
	}

	updateTransmitModeComboBox();
}

void MainWindow::on_gsTransmitModeVAD_triggered(bool down, QVariant)
{
	if (down) {
		g.s.atTransmit = Settings::VAD;
		g.l->log(Log::Information, tr("Transmit Mode set to Voice Activity"));
	}

	updateTransmitModeComboBox();
}

void MainWindow::on_gsSendTextMessage_triggered(bool down, QVariant scdata) {
	if (!down || !g.sh || !g.sh->isRunning() || g.uiSession == 0) {
		return;
	}

	QString qsText = scdata.toString();
	if (qsText.isEmpty()) {
		return;
	}

	Channel *c = ClientUser::get(g.uiSession)->cChannel;
	g.sh->sendChannelTextMessage(c->iId, qsText, false);
	g.l->log(Log::TextMessage, tr("To %1: %2").arg(Log::formatChannel(c), qsText), tr("Message to channel %1").arg(c->qsName), true);
}

void MainWindow::on_gsSendClipboardTextMessage_triggered(bool down, QVariant) {
	if (!down || (QApplication::clipboard()->text().isEmpty())) {
		return;
	}

	// call sendChatbarMessage() instead of on_gsSendTextMessage_triggered() to handle
	// formatting of the content in the clipboard, i.e., href.  
	sendChatbarMessage(QApplication::clipboard()->text());
}

void MainWindow::whisperReleased(QVariant scdata) {
	if (g.iPushToTalk <= 0)
		return;

	ShortcutTarget st = scdata.value<ShortcutTarget>();

	g.iPushToTalk--;

	removeTarget(&st);
	updateTarget();
}

void MainWindow::onChangeMute()
{
	if (!g.ai) {
		return;
	}

	emit corkAudioInputStream(g.s.bMute && !g.bInAudioWizard);
}

void MainWindow::onResetAudio()
{
	qWarning("MainWindow: Start audio reset");
	Audio::stop();
	Audio::start();
	qWarning("MainWindow: Audio reset complete");
}

void MainWindow::viewCertificate(bool) {
	ViewCert vc(g.sh->qscCert, this);
	vc.exec();
}

/**
 * This function prepares the UI for receiving server data. It gets called once the
 * connection to the server is established but before the server Sync is complete.
 */
void MainWindow::serverConnected() {
	g.uiSession = 0;
	g.pPermissions = ChanACL::None;
	g.iCodecAlpha = 0x8000000b;
	g.bPreferAlpha = true;
#ifdef USE_OPUS
	g.bOpus = true;
#else
	g.bOpus = false;
#endif
	g.iCodecBeta = 0;

#ifdef Q_OS_MAC
	// Suppress AppNap while we're connected to a server.
	MUSuppressAppNap(true);
#endif

	g.l->clearIgnore();
	g.l->setIgnore(Log::UserJoin);
	g.l->setIgnore(Log::OtherSelfMute);
	QString host, uname, pw;
	unsigned short port;
	g.sh->getConnectionInfo(host, port, uname, pw);
	g.l->log(Log::ServerConnected, tr("Connected."));
	qaServerDisconnect->setEnabled(true);
	qaServerInformation->setEnabled(true);
	qaServerBanList->setEnabled(true);

	Channel *root = Channel::get(0);
	pmModel->renameChannel(root, tr("Root"));
	pmModel->setCommentHash(root, QByteArray());
	root->uiPermissions = 0;

	qtvUsers->setRowHidden(0, QModelIndex(), false);

	g.bAllowHTML = true;
	g.uiMessageLength = 5000;
	g.uiImageLength = 131072;
	g.uiMaxUsers = 0;

	if (g.s.bMute || g.s.bDeaf) {
		g.sh->setSelfMuteDeafState(g.s.bMute, g.s.bDeaf);
		onChangeMute();
	}

	// Update QActions and menues
	on_qmServer_aboutToShow();
	on_qmSelf_aboutToShow();
	qmChannel_aboutToShow();
	qmUser_aboutToShow();
	on_qmConfig_aboutToShow();

#ifdef Q_OS_WIN
	TaskList::addToRecentList(g.s.qsLastServer, uname, host, port);
#endif
}

void MainWindow::serverDisconnected(QAbstractSocket::SocketError err, QString reason) {
	// Note that the saving of the ChannelListeners has to be done, before resetting g.uiSession
	// Save ChannelListeners
	ChannelListener::saveToDB();
	// clear ChannelListener
	ChannelListener::clear();

	g.uiSession = 0;
	g.pPermissions = ChanACL::None;
	g.bAttenuateOthers = false;
	qaServerDisconnect->setEnabled(false);
	qaServerInformation->setEnabled(false);
	qaServerBanList->setEnabled(false);
	qtvUsers->setCurrentIndex(QModelIndex());
	qteChat->setEnabled(false);
	updateTrayIcon();

#ifdef Q_OS_MAC
	// Remove App Nap suppression now that we're disconnected.
	MUSuppressAppNap(false);
#endif

	QString uname, pw, host;
	unsigned short port;
	g.sh->getConnectionInfo(host, port, uname, pw);
	if (g.db->setShortcuts(g.sh->qbaDigest, g.s.qlShortcuts))
		GlobalShortcutEngine::engine->bNeedRemap = true;

	if (aclEdit) {
		aclEdit->reject();
		delete aclEdit;
		aclEdit = NULL;
	}

	if (banEdit) {
		banEdit->reject();
		delete banEdit;
		banEdit = NULL;
	}

	if (userEdit) {
		userEdit->reject();
		delete userEdit;
		userEdit = NULL;
	}

	if (tokenEdit) {
		tokenEdit->reject();
		delete tokenEdit;
		tokenEdit = NULL;
	}

	QSet<QAction *> qs;
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
	qs += QSet<QAction*>(qlServerActions.begin(), qlServerActions.end());
	qs += QSet<QAction*>(qlChannelActions.begin(), qlChannelActions.end());
	qs += QSet<QAction*>(qlUserActions.begin(), qlUserActions.end());
#else
	// In Qt 5.14 QList::toSet() has been deprecated as there exists a dedicated constructor of QSet for this now
	qs += qlServerActions.toSet();
	qs += qlChannelActions.toSet();
	qs += qlUserActions.toSet();
#endif

	foreach(QAction *a, qs)
		delete a;

	qlServerActions.clear();
	qlChannelActions.clear();
	qlUserActions.clear();

	pmModel->removeAll();
	qtvUsers->setRowHidden(0, QModelIndex(), true);

	// Update QActions and menues
	on_qmServer_aboutToShow();
	on_qmSelf_aboutToShow();
	qmChannel_aboutToShow();
	qmUser_aboutToShow();
	on_qmConfig_aboutToShow();

	if (! g.sh->qlErrors.isEmpty()) {
		foreach(QSslError e, g.sh->qlErrors)
			g.l->log(Log::Warning, tr("SSL Verification failed: %1").arg(e.errorString().toHtmlEscaped()));
		if (! g.sh->qscCert.isEmpty()) {
			QSslCertificate c = g.sh->qscCert.at(0);
			QString basereason;
			QString actual_digest = QString::fromLatin1(c.digest(QCryptographicHash::Sha1).toHex());
			QString digests_section = tr("<li>Server certificate digest (SHA-1):\t%1</li>").arg(ViewCert::prettifyDigest(actual_digest));
			QString expected_digest = g.db->getDigest(host, port);
			if (! expected_digest.isNull()) {
				basereason = tr("<b>WARNING:</b> The server presented a certificate that was different from the stored one.");
				digests_section.append(tr("<li>Expected certificate digest (SHA-1):\t%1</li>").arg(ViewCert::prettifyDigest(expected_digest)));
			} else {
				basereason = tr("Server presented a certificate which failed verification.");
			}
			QStringList qsl;
			foreach(QSslError e, g.sh->qlErrors)
				qsl << QString::fromLatin1("<li>%1</li>").arg(e.errorString().toHtmlEscaped());

			QMessageBox qmb(QMessageBox::Warning, QLatin1String("Mumble"),
			                tr("<p>%1</p><ul>%2</ul><p>The specific errors with this certificate are:</p><ol>%3</ol>"
			                   "<p>Do you wish to accept this certificate anyway?<br />(It will also be stored so you won't be asked this again.)</p>"
			                  ).arg(basereason).arg(digests_section).arg(qsl.join(QString())), QMessageBox::Yes | QMessageBox::No, this);

			qmb.setDefaultButton(QMessageBox::No);
			qmb.setEscapeButton(QMessageBox::No);

			QPushButton *qp = qmb.addButton(tr("&View Certificate"), QMessageBox::ActionRole);
			forever {
				int res = qmb.exec();

				if ((res == 0) && (qmb.clickedButton() == qp)) {
					ViewCert vc(g.sh->qscCert, this);
					vc.exec();
					continue;
				} else if (res == QMessageBox::Yes) {
					g.db->setDigest(host, port, QString::fromLatin1(c.digest(QCryptographicHash::Sha1).toHex()));
					qaServerDisconnect->setEnabled(true);
					on_Reconnect_timeout();
				}
				break;
			}
		}
	} else if (err == QAbstractSocket::SslHandshakeFailedError) {
		QMessageBox::warning(this, tr("SSL Version mismatch"), tr("This server is using an older encryption standard, and is no longer supported by modern versions of Mumble."), QMessageBox::Ok);
	} else {
		bool ok = false;


		if (! reason.isEmpty()) {
			g.l->log(Log::ServerDisconnected, tr("Server connection failed: %1.").arg(reason.toHtmlEscaped()));
		}  else {
			g.l->log(Log::ServerDisconnected, tr("Disconnected from server."));
		}

		Qt::WindowFlags wf = 0;
#ifdef Q_OS_MAC
		wf = Qt::Sheet;
#endif

		bool matched = true;
		switch (rtLast) {
			case MumbleProto::Reject_RejectType_InvalidUsername:
				uname = QInputDialog::getText(this, tr("Invalid username"),
				                              tr("You connected with an invalid username, please try another one."),
				                              QLineEdit::Normal, uname, &ok, wf);
				break;
			case MumbleProto::Reject_RejectType_UsernameInUse:
				uname = QInputDialog::getText(this, tr("Username in use"),
				                              tr("That username is already in use, please try another username."),
				                              QLineEdit::Normal, uname, &ok, wf);
				break;
			case MumbleProto::Reject_RejectType_WrongUserPW:
				pw = QInputDialog::getText(this,
				                           tr("Wrong certificate or password"),
				                           tr("Wrong certificate or password for registered user. If you are\n"
				                              "certain this user is protected by a password please retry.\n"
				                              "Otherwise abort and check your certificate and username."),
				                           QLineEdit::Password, pw, &ok, wf);
				break;
			case MumbleProto::Reject_RejectType_WrongServerPW:
				pw = QInputDialog::getText(this,
				                           tr("Wrong password"),
				                           tr("Wrong server password for unregistered user account, please try again."),
				                           QLineEdit::Password, pw, &ok, wf);
				break;
			default:
				matched = false;
				break;
		}
		if (ok && matched) {
			if (! g.s.bSuppressIdentity)
				g.db->setPassword(host, port, uname, pw);
			qaServerDisconnect->setEnabled(true);
			g.sh->setConnectionInfo(host, port, uname, pw);
			on_Reconnect_timeout();
		} else if (!matched && g.s.bReconnect && ! reason.isEmpty()) {
			qaServerDisconnect->setEnabled(true);
			if (bRetryServer) {
				qtReconnect->start();
			}
		}
	}
	qstiIcon->setToolTip(tr("Mumble -- %1").arg(QLatin1String(MUMBLE_RELEASE)));
	AudioInput::setMaxBandwidth(-1);
}

void MainWindow::resolverError(QAbstractSocket::SocketError, QString reason) {
	if (! reason.isEmpty()) {
		g.l->log(Log::ServerDisconnected, tr("Server connection failed: %1.").arg(reason.toHtmlEscaped()));
	}  else {
		g.l->log(Log::ServerDisconnected, tr("Server connection failed."));
	}

	if (g.s.bReconnect) {
		qaServerDisconnect->setEnabled(true);
		if (bRetryServer) {
			qtReconnect->start();
		}
	}
}

void MainWindow::trayAboutToShow() {
	bool top = false;

	QPoint p = qstiIcon->geometry().center();
	if (p.isNull()) {
		p = QCursor::pos();
	}

	QScreen *screen = Screen::screenAt(p);
	if(screen != nullptr){
		QRect qr = screen->geometry();

		if (p.y() < (qr.height() / 2))
			top = true;

		qmTray->clear();
		if (top) {
			qmTray->addAction(qaQuit);
			qmTray->addAction(qaShow);
			qmTray->addSeparator();
			qmTray->addAction(qaAudioDeaf);
			qmTray->addAction(qaAudioMute);
		} else {
			qmTray->addAction(qaAudioMute);
			qmTray->addAction(qaAudioDeaf);
			qmTray->addSeparator();
			qmTray->addAction(qaShow);
			qmTray->addAction(qaQuit);
		}
	}
}

void MainWindow::showRaiseWindow() {
	if (isMinimized()) {
		setWindowState((windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
	}

	show();
	raise();
	activateWindow();
}

void MainWindow::on_Icon_activated(QSystemTrayIcon::ActivationReason reason) {
	switch (reason) {
		case QSystemTrayIcon::Trigger:
		case QSystemTrayIcon::DoubleClick:
		case QSystemTrayIcon::MiddleClick:
		if (isMinimized()) {
			showRaiseWindow();
		} else {
			showMinimized();
		}
		default: break;
	}
}

/**
 * This function updates the qteChat bar default text according to
 * the selected user/channel in the users treeview.
 */
void MainWindow::qtvUserCurrentChanged(const QModelIndex &, const QModelIndex &) {
	updateChatBar();
}

void MainWindow::updateChatBar() {
	User *p = pmModel->getUser(qtvUsers->currentIndex());
	Channel *c = pmModel->getChannel(qtvUsers->currentIndex());

	if (g.uiSession == 0) {
		qteChat->setDefaultText(tr("<center>Not connected</center>"), true);
	} else if (!g.s.bChatBarUseSelection || p == NULL || p->uiSession == g.uiSession) {
		// Channel tree target
		if (!g.s.bChatBarUseSelection || c == NULL) // If no channel selected fallback to current one
			c = ClientUser::get(g.uiSession)->cChannel;

		qteChat->setDefaultText(tr("<center>Type message to channel '%1' here</center>").arg(c->qsName.toHtmlEscaped()));
	} else {
		// User target
		qteChat->setDefaultText(tr("<center>Type message to user '%1' here</center>").arg(p->qsName.toHtmlEscaped()));
	}

	updateMenuPermissions();
}

void MainWindow::customEvent(QEvent *evt) {
	if (evt->type() == MB_QEVENT) {
		MessageBoxEvent *mbe=static_cast<MessageBoxEvent *>(evt);
		g.l->log(Log::Information, mbe->msg);
		return;
	} else if (evt->type() == OU_QEVENT) {
		OpenURLEvent *oue=static_cast<OpenURLEvent *>(evt);
		openUrl(oue->url);
		return;
	} else if (evt->type() != SERVERSEND_EVENT) {
		return;
	}

	ServerHandlerMessageEvent *shme=static_cast<ServerHandlerMessageEvent *>(evt);

#ifdef QT_NO_DEBUG
#define MUMBLE_MH_MSG(x) case MessageHandler:: x : { \
		MumbleProto:: x msg; \
		if (msg.ParseFromArray(shme->qbaMsg.constData(), shme->qbaMsg.size())) \
			msg##x(msg); \
		break; \
	}
#else
#define MUMBLE_MH_MSG(x) case MessageHandler:: x : { \
		MumbleProto:: x msg; \
		if (msg.ParseFromArray(shme->qbaMsg.constData(), shme->qbaMsg.size())) { \
			printf("%s:\n", #x); \
			msg.PrintDebugString(); \
			msg##x(msg); \
		} \
		break; \
	}
#endif
	switch (shme->uiType) {
			MUMBLE_MH_ALL
	}


#undef MUMBLE_MH_MSG
}


void MainWindow::on_qteLog_anchorClicked(const QUrl &url) {
	if (!handleSpecialContextMenu(url, QCursor::pos(), true)) {
#ifdef Q_OS_MAC
		// Clicking a link can cause the user's default browser to pop up while
		// we're intercepting all events. This can be very confusing (because
		// the user can't click on anything before they dismiss the overlay
		// by hitting their toggle hotkey), so let's disallow clicking links
		// when embedded into the overlay for now.
		if (g.ocIntercept)
			return;
#endif
		if (url.scheme() != QLatin1String("file")
		        && url.scheme() != QLatin1String("qrc")
		        && !url.isRelative())
			QDesktopServices::openUrl(url);
	}
}

void MainWindow::on_qteLog_highlighted(const QUrl &url) {
	if (url.scheme() == QString::fromLatin1("clientid") || url.scheme() == QString::fromLatin1("channelid"))
		return;

	if (! url.isValid())
		QToolTip::hideText();
	else {
		if (isActiveWindow()) {
			QToolTip::showText(QCursor::pos(), url.toString(), qteLog, QRect());
		}
	}
}

void MainWindow::context_triggered() {
	QAction *a = qobject_cast<QAction *>(sender());

	Channel *c = pmModel->getChannel(qtvUsers->currentIndex());
	ClientUser *p = pmModel->getUser(qtvUsers->currentIndex());

	MumbleProto::ContextAction mpca;
	mpca.set_action(u8(a->data().toString()));
	if (p && p->uiSession)
		mpca.set_session(p->uiSession);
	if (c)
		mpca.set_channel_id(c->iId);
	g.sh->sendMessage(mpca);
}

/**
 * Presents a file open dialog, opens the selected picture and returns it.
 * @return Pair consisting of the raw file contents and the image. Unitialized on error or cancel.
 */
QPair<QByteArray, QImage> MainWindow::openImageFile() {
	QPair<QByteArray, QImage> retval;

	QString fname = QFileDialog::getOpenFileName(this, tr("Choose image file"), getImagePath(), tr("Images (*.png *.jpg *.jpeg)"));

	if (fname.isNull())
		return retval;

	QFile f(fname);
	if (! f.open(QIODevice::ReadOnly)) {
		QMessageBox::warning(this, tr("Failed to load image"), tr("Could not open file for reading."));
		return retval;
	}

	updateImagePath(fname);

	QByteArray qba = f.readAll();
	f.close();

	QBuffer qb(&qba);
	qb.open(QIODevice::ReadOnly);

	QImageReader qir;
	qir.setAutoDetectImageFormat(false);

	QByteArray fmt;
	if (!RichTextImage::isValidImage(qba, fmt)) {
		QMessageBox::warning(this, tr("Failed to load image"), tr("Image format not recognized."));
		return retval;
	}

	qir.setFormat(fmt);
	qir.setDevice(&qb);

	QImage img = qir.read();
	if (img.isNull()) {
		QMessageBox::warning(this, tr("Failed to load image"), tr("Image format not recognized."));
		return retval;
	}

	retval.first = qba;
	retval.second = img;

	return retval;
}

void MainWindow::destroyUserInformation() {
	UserInformation *ui = static_cast<UserInformation *>(sender());
	QMap<unsigned int, UserInformation *>::iterator i;
	for (i=qmUserInformations.begin(); i != qmUserInformations.end(); ++i) {
		if (i.value() == ui) {
			qmUserInformations.erase(i);
			return;
		}
	}
}