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	/* -- mode: c++; c-basic-offset:4 --
	mainwindow.cpp

	This file is part of Kleopatra, the KDE keymanager
	SPDX-FileCopyrightText: 2007 Klarälvdalens Datakonsult AB

	SPDX-License-Identifier: GPL-2.0-or-later
	*/

	#include <config-kleopatra.h>
	#include "mainwindow.h"
	#include "aboutdata.h"
	#include "settings.h"

	#include "view/padwidget.h"
	#include "view/searchbar.h"
	#include "view/tabwidget.h"
	#include "view/keylistcontroller.h"
	#include "view/keycacheoverlay.h"
	#include "view/smartcardwidget.h"
	#include "view/welcomewidget.h"

	#include "commands/selftestcommand.h"
	#include "commands/importcrlcommand.h"
	#include "commands/importcertificatefromfilecommand.h"
	#include "commands/decryptverifyfilescommand.h"
	#include "commands/signencryptfilescommand.h"

	#include "conf/groupsconfigdialog.h"

	#include "utils/detail_p.h"
	#include <Libkleo/GnuPG>
	#include "utils/action_data.h"
	#include "utils/filedialog.h"
	#include "utils/clipboardmenu.h"

	#include "dialogs/updatenotification.h"

	#include <KXMLGUIFactory>
	#include <QApplication>
	#include <QSize>
	#include <QLineEdit>
	#include <KActionMenu>
	#include <KActionCollection>
	#include <KLocalizedString>
	#include <KStandardAction>
	#include <QAction>
	#include <KAboutData>
	#include <KMessageBox>
	#include <KStandardGuiItem>
	#include <KShortcutsDialog>
	#include <KEditToolBar>
	#include "kleopatra_debug.h"
	#include <KConfigGroup>
	#include <KConfigDialog>
	#include <kxmlgui_version.h>

	#include <QAbstractItemView>
	#include <QCloseEvent>
	#include <QMenu>
	#include <QTimer>
	#include <QProcess>
	#include <QVBoxLayout>
	#include <QMimeData>
	#include <QDesktopServices>
	#include <QDir>
	#include <QStackedWidget>
	#include <QStatusBar>
	#include <QLabel>

	#include <Libkleo/Formatting>
	#include <Libkleo/KeyListModel>
	#include <Libkleo/KeyListSortFilterProxyModel>
	#include <Libkleo/Stl_Util>
	#include <Libkleo/Classify>
	#include <Libkleo/KeyCache>

	#include <vector>
	#include <KSharedConfig>

	using namespace Kleo;
	using namespace Kleo::Commands;
	using namespace GpgME;

	static KGuiItem KStandardGuiItem_quit()
	{
	static const QString app = KAboutData::applicationData().componentName();
	KGuiItem item = KStandardGuiItem::quit();
	item.setText(i18nc("Quit [ApplicationName]", "&Quit %1", app));
	return item;
	}

	static KGuiItem KStandardGuiItem_close()
	{
	KGuiItem item = KStandardGuiItem::close();
	item.setText(i18n("Only &Close Window"));
	return item;
	}

	static bool isQuitting = false;

	namespace
	{
	static const std::vector<QString> mainViewActionNames = {
	QStringLiteral("view_certificate_overview"),
	QStringLiteral("manage_smartcard"),
	QStringLiteral("pad_view")
	};
	}

	class MainWindow::Private
	{
	friend class ::MainWindow;
	MainWindow *const q;

	public:
	explicit Private(MainWindow *qq);
	~Private();

	template <typename T>
	void createAndStart()
	{
	(new T(this->currentView(), &this->controller))->start();
	}
	template <typename T>
	void createAndStart(QAbstractItemView *view)
	{
	(new T(view, &this->controller))->start();
	}
	template <typename T>
	void createAndStart(const QStringList &a)
	{
	(new T(a, this->currentView(), &this->controller))->start();
	}
	template <typename T>
	void createAndStart(const QStringList &a, QAbstractItemView *view)
	{
	(new T(a, view, &this->controller))->start();
	}

	void closeAndQuit()
	{
	const QString app = KAboutData::applicationData().componentName();
	const int rc = KMessageBox::questionYesNoCancel(q,
	i18n("%1 may be used by other applications as a service.\n"
	"You may instead want to close this window without exiting %1.", app),
	i18n("Really Quit?"), KStandardGuiItem_close(), KStandardGuiItem_quit(), KStandardGuiItem::cancel(),
	QLatin1String("really-quit-") + app.toLower());
	if (rc == KMessageBox::Cancel) {
	return;
	}
	isQuitting = true;
	if (!q->close()) {
	return;
	}
	// WARNING: 'this' might be deleted at this point!
	if (rc == KMessageBox::No) {
	qApp->quit();
	}
	}
	void configureToolbars()
	{
	KEditToolBar dlg(q->factory());
	dlg.exec();
	}
	void editKeybindings()
	{
	#if KXMLGUI_VERSION < QT_VERSION_CHECK(5,84,0)
	KShortcutsDialog::configure(q->actionCollection(), KShortcutsEditor::LetterShortcutsAllowed);
	#else
	KShortcutsDialog::showDialog(q->actionCollection(), KShortcutsEditor::LetterShortcutsAllowed, q);
	#endif
	updateSearchBarClickMessage();
	}

	void updateSearchBarClickMessage()
	{
	const QString shortcutStr = focusToClickSearchAction->shortcut().toString();
	ui.searchBar->updateClickMessage(shortcutStr);
	}

	void updateStatusBar()
	{
	const auto complianceMode = Formatting::complianceMode();
	if (complianceMode == QStringLiteral("de-vs")) {
	auto statusBar = new QStatusBar;
	q->setStatusBar(statusBar);
	auto statusLbl = new QLabel(Formatting::deVsString());
	statusBar->insertPermanentWidget(0, statusLbl);

	} else {
	q->setStatusBar(nullptr);
	}
	}

	void selfTest()
	{
	createAndStart<SelfTestCommand>();
	}

	void configureGroups()
	{
	if (KConfigDialog::showDialog(GroupsConfigDialog::dialogName())) {
	return;
	}
	KConfigDialog *dialog = new GroupsConfigDialog(q);
	dialog->show();
	}

	void showHandbook();

	void gnupgLogViewer()
	{
	if (!QProcess::startDetached(QStringLiteral("kwatchgnupg"), QStringList()))
	KMessageBox::error(q, i18n("Could not start the GnuPG Log Viewer (kwatchgnupg). "
	"Please check your installation."),
	i18n("Error Starting KWatchGnuPG"));
	}

	void forceUpdateCheck()
	{
	UpdateNotification::forceUpdateCheck(q);
	}

	void openCompendium()
	{
	QDir datadir(QCoreApplication::applicationDirPath() + QStringLiteral("/../share/gpg4win"));
	const auto path = datadir.filePath(i18nc("The Gpg4win compendium is only available"
	"at this point (24.7.2017) in german and english."
	"Please check with Gpg4win before translating this filename.",
	"gpg4win-compendium-en.pdf"));
	qCDebug(KLEOPATRA_LOG) << "Opening Compendium at:" << path;
	// The compendium is always installed. So this should work. Otherwise
	// we have debug output.
	QDesktopServices::openUrl(QUrl::fromLocalFile(path));
	}

	void slotConfigCommitted();
	void slotContextMenuRequested(QAbstractItemView *, const QPoint &p)
	{
	if (auto const menu = qobject_cast<QMenu *>(q->factory()->container(QStringLiteral("listview_popup"), q))) {
	menu->exec(p);
	} else {
	qCDebug(KLEOPATRA_LOG) << "no \"listview_popup\" <Menu> in kleopatra's ui.rc file";
	}
	}

	void slotFocusQuickSearch()
	{
	ui.searchBar->lineEdit()->setFocus();
	}

	void showView(const QString &actionName, QWidget *widget)
	{
	const auto coll = q->actionCollection();
	if (coll) {
	for ( const QString &name : mainViewActionNames ) {
	if (auto action = coll->action(name)) {
	action->setChecked(name == actionName);
	}
	}
	}
	ui.stackWidget->setCurrentWidget(widget);
	}

	void showCertificateView()
	{
	showView(QStringLiteral("view_certificate_overview"),
	KeyCache::instance()->keys().empty() ? ui.welcomeWidget : ui.searchTab);
	}

	void showSmartcardView()
	{
	showView(QStringLiteral("manage_smartcard"), ui.scWidget);
	}

	void showPadView()
	{
	if (!ui.padWidget) {
	ui.padWidget = new PadWidget;
	ui.stackWidget->addWidget(ui.padWidget);
	}
	showView(QStringLiteral("pad_view"), ui.padWidget);
	ui.stackWidget->resize(ui.padWidget->sizeHint());
	}

	private:
	void setupActions();

	QAbstractItemView *currentView() const
	{
	return ui.tabWidget.currentView();
	}

	void keyListingDone()
	{
	const auto curWidget = ui.stackWidget->currentWidget();
	if (curWidget == ui.scWidget \|\| curWidget == ui.padWidget) {
	return;
	}
	showCertificateView();
	}

	private:
	Kleo::KeyListController controller;
	bool firstShow : 1;
	struct UI {
	QWidget *searchTab;
	TabWidget tabWidget;
	SearchBar *searchBar;
	PadWidget *padWidget;
	SmartCardWidget *scWidget;
	WelcomeWidget *welcomeWidget;
	QStackedWidget *stackWidget;
	explicit UI(MainWindow *q);
	} ui;
	QAction *focusToClickSearchAction;
	ClipboardMenu *clipboadMenu;
	};

	MainWindow::Private::UI::UI(MainWindow *q)
	: tabWidget(q), padWidget(nullptr)
	{
	KDAB_SET_OBJECT_NAME(tabWidget);

	searchTab = new QWidget;
	auto vbox = new QVBoxLayout(searchTab);
	vbox->setSpacing(0);
	searchBar = new SearchBar;
	vbox->addWidget(searchBar);
	tabWidget.connectSearchBar(searchBar);
	vbox->addWidget(&tabWidget);

	auto mainWidget = new QWidget;
	auto mainLayout = new QVBoxLayout(mainWidget);
	stackWidget = new QStackedWidget;

	mainLayout->addWidget(stackWidget);

	stackWidget->addWidget(searchTab);

	new KeyCacheOverlay(mainWidget, q);

	scWidget = new SmartCardWidget();
	stackWidget->addWidget(scWidget);

	welcomeWidget = new WelcomeWidget();
	stackWidget->addWidget(welcomeWidget);

	q->setCentralWidget(mainWidget);
	}

	MainWindow::Private::Private(MainWindow *qq)
	: q(qq),
	controller(q),
	firstShow(true),
	ui(q)
	{
	KDAB_SET_OBJECT_NAME(controller);

	AbstractKeyListModel *flatModel = AbstractKeyListModel::createFlatKeyListModel(q);
	AbstractKeyListModel *hierarchicalModel = AbstractKeyListModel::createHierarchicalKeyListModel(q);

	KDAB_SET_OBJECT_NAME(flatModel);
	KDAB_SET_OBJECT_NAME(hierarchicalModel);

	controller.setFlatModel(flatModel);
	controller.setHierarchicalModel(hierarchicalModel);
	controller.setTabWidget(&ui.tabWidget);

	ui.tabWidget.setFlatModel(flatModel);
	ui.tabWidget.setHierarchicalModel(hierarchicalModel);

	setupActions();

	ui.stackWidget->setCurrentWidget(ui.searchTab);
	if (auto action = q->actionCollection()->action(QStringLiteral("view_certificate_overview"))) {
	action->setChecked(true);
	}

	connect(&controller, SIGNAL(contextMenuRequested(QAbstractItemView,QPoint)), q, SLOT(slotContextMenuRequested(QAbstractItemView,QPoint)));
	connect(KeyCache::instance().get(), &KeyCache::keyListingDone, q, [this] () {keyListingDone();});

	q->createGUI(QStringLiteral("kleopatra.rc"));

	q->setAcceptDrops(true);

	// set default window size
	q->resize(QSize(1024, 500));
	q->setAutoSaveSettings();

	updateSearchBarClickMessage();
	updateStatusBar();
	}

	MainWindow::Private::~Private() {}

	MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags flags)
	: KXmlGuiWindow(parent, flags), d(new Private(this))
	{}

	MainWindow::~MainWindow() {}

	void MainWindow::Private::setupActions()
	{

	KActionCollection *const coll = q->actionCollection();

	const action_data action_data[] = {
	// most have been MOVED TO keylistcontroller.cpp
	// Tools menu
	#ifndef Q_OS_WIN
	{
	"tools_start_kwatchgnupg", i18n("GnuPG Log Viewer"), QString(),
	"kwatchgnupg", q, SLOT(gnupgLogViewer()), QString(), false, true
	},
	#endif
	#ifdef Q_OS_WIN
	{
	"help_check_updates", i18n("Check for updates"), QString(),
	"gpg4win-compact", q, SLOT(forceUpdateCheck()), QString(), false, true
	},
	{
	"help_show_compendium", i18n("Gpg4win Compendium"), QString(),
	"gpg4win-compact", q, SLOT(openCompendium()), QString(), false, true
	},
	#endif
	{
	"view_certificate_overview", i18nc("@action show certificate overview", "Certificates"),
	i18n("Show certificate overview"), "view-certificate", q, SLOT(showCertificateView()), QString(), false, true
	},
	{
	"pad_view", i18nc("@action show input / output area for encrypting/signing resp. decrypting/verifying text", "Notepad"),
	i18n("Show pad for encrypting/decrypting and signing/verifying text"), "note", q, SLOT(showPadView()), QString(), false, true
	},
	// most have been MOVED TO keylistcontroller.cpp
	// Settings menu
	{
	"settings_self_test", i18n("Perform Self-Test"), QString(),
	nullptr, q, SLOT(selfTest()), QString(), false, true
	},
	{
	"configure_groups", i18n("Configure Groups..."), QString(),
	"group", q, SLOT(configureGroups()), QString(), false, true
	},
	{
	"manage_smartcard", i18nc("@action show smartcard management view", "Smartcards"),
	i18n("Show smartcard management"), "auth-sim-locked", q, SLOT(showSmartcardView()), QString(), false, true
	}

	// most have been MOVED TO keylistcontroller.cpp
	};

	make_actions_from_data(action_data, /sizeof action_data / sizeof action_data,*/ coll);

	if (!Settings().groupsEnabled()) {
	if (auto action = coll->action(QStringLiteral("configure_groups"))) {
	delete action;
	}
	}

	for ( const QString &name : mainViewActionNames ) {
	if (auto action = coll->action(name)) {
	action->setCheckable(true);
	}
	}

	if (QAction *action = coll->action(QStringLiteral("configure_backend"))) {
	action->setMenuRole(QAction::NoRole); //prevent Qt OS X heuristics for config* actions
	}

	KStandardAction::close(q, SLOT(close()), coll);
	KStandardAction::quit(q, SLOT(closeAndQuit()), coll);
	KStandardAction::configureToolbars(q, SLOT(configureToolbars()), coll);
	KStandardAction::keyBindings(q, SLOT(editKeybindings()), coll);
	KStandardAction::preferences(qApp, SLOT(openOrRaiseConfigDialog()), coll);

	focusToClickSearchAction = new QAction(i18n("Set Focus to Quick Search"), q);
	coll->addAction(QStringLiteral("focus_to_quickseach"), focusToClickSearchAction);
	coll->setDefaultShortcut(focusToClickSearchAction, QKeySequence(Qt::ALT \| Qt::Key_Q));
	connect(focusToClickSearchAction, SIGNAL(triggered(bool)), q, SLOT(slotFocusQuickSearch()));
	clipboadMenu = new ClipboardMenu(q);
	clipboadMenu->setMainWindow(q);
	clipboadMenu->clipboardMenu()->setIcon(QIcon::fromTheme(QStringLiteral("edit-paste")));
	clipboadMenu->clipboardMenu()->setPopupMode(QToolButton::InstantPopup);
	coll->addAction(QStringLiteral("clipboard_menu"), clipboadMenu->clipboardMenu());

	q->setStandardToolBarMenuEnabled(true);

	controller.createActions(coll);

	ui.tabWidget.createActions(coll);
	}

	void MainWindow::Private::slotConfigCommitted()
	{
	controller.updateConfig();
	updateStatusBar();
	}

	void MainWindow::closeEvent(QCloseEvent *e)
	{
	// KMainWindow::closeEvent() insists on quitting the application,
	// so do not let it touch the event...
	qCDebug(KLEOPATRA_LOG);
	if (d->controller.hasRunningCommands()) {
	if (d->controller.shutdownWarningRequired()) {
	const int ret = KMessageBox::warningContinueCancel(this, i18n("There are still some background operations ongoing. "
	"These will be terminated when closing the window. "
	"Proceed?"),
	i18n("Ongoing Background Tasks"));
	if (ret != KMessageBox::Continue) {
	e->ignore();
	return;
	}
	}
	d->controller.cancelCommands();
	if (d->controller.hasRunningCommands()) {
	// wait for them to be finished:
	setEnabled(false);
	QEventLoop ev;
	QTimer::singleShot(100, &ev, &QEventLoop::quit);
	connect(&d->controller, &KeyListController::commandsExecuting, &ev, &QEventLoop::quit);
	ev.exec();
	if (d->controller.hasRunningCommands())
	qCWarning(KLEOPATRA_LOG)
	<< "controller still has commands running, this may crash now...";
	setEnabled(true);
	}
	}
	if (isQuitting \|\| qApp->isSavingSession()) {
	d->ui.tabWidget.saveViews(KSharedConfig::openConfig().data());
	KConfigGroup grp(KConfigGroup(KSharedConfig::openConfig(), autoSaveGroup()));
	saveMainWindowSettings(grp);
	e->accept();
	} else {
	e->ignore();
	hide();
	}
	}

	void MainWindow::showEvent(QShowEvent *e)
	{
	KXmlGuiWindow::showEvent(e);
	if (d->firstShow) {
	d->ui.tabWidget.loadViews(KSharedConfig::openConfig().data());
	d->firstShow = false;
	}

	if (!savedGeometry.isEmpty()) {
	restoreGeometry(savedGeometry);
	}

	}

	void MainWindow::hideEvent(QHideEvent *e)
	{
	savedGeometry = saveGeometry();
	KXmlGuiWindow::hideEvent(e);
	}

	void MainWindow::importCertificatesFromFile(const QStringList &files)
	{
	if (!files.empty()) {
	d->createAndStart<ImportCertificateFromFileCommand>(files);
	}
	}

	static QStringList extract_local_files(const QMimeData *data)
	{
	const QList<QUrl> urls = data->urls();
	// begin workaround KDE/Qt misinterpretation of text/uri-list
	QList<QUrl>::const_iterator end = urls.end();
	if (urls.size() > 1 && !urls.back().isValid()) {
	--end;
	}
	// end workaround
	QStringList result;
	std::transform(urls.begin(), end,
	std::back_inserter(result),
	std::mem_fn(&QUrl::toLocalFile));
	result.erase(std::remove_if(result.begin(), result.end(),
	std::mem_fn(&QString::isEmpty)), result.end());
	return result;
	}

	static bool can_decode_local_files(const QMimeData *data)
	{
	if (!data) {
	return false;
	}
	return !extract_local_files(data).empty();
	}

	void MainWindow::dragEnterEvent(QDragEnterEvent *e)
	{
	qCDebug(KLEOPATRA_LOG);

	if (can_decode_local_files(e->mimeData())) {
	e->acceptProposedAction();
	}
	}

	void MainWindow::dropEvent(QDropEvent *e)
	{
	qCDebug(KLEOPATRA_LOG);

	if (!can_decode_local_files(e->mimeData())) {
	return;
	}

	e->setDropAction(Qt::CopyAction);

	const QStringList files = extract_local_files(e->mimeData());

	const unsigned int classification = classify(files);

	QMenu menu;

	QAction *const signEncrypt = menu.addAction(i18n("Sign/Encrypt..."));
	QAction *const decryptVerify = mayBeAnyMessageType(classification) ? menu.addAction(i18n("Decrypt/Verify...")) : nullptr;
	if (signEncrypt \|\| decryptVerify) {
	menu.addSeparator();
	}

	QAction *const importCerts = mayBeAnyCertStoreType(classification) ? menu.addAction(i18n("Import Certificates")) : nullptr;
	QAction *const importCRLs = mayBeCertificateRevocationList(classification) ? menu.addAction(i18n("Import CRLs")) : nullptr;
	if (importCerts \|\| importCRLs) {
	menu.addSeparator();
	}

	if (!signEncrypt && !decryptVerify && !importCerts && !importCRLs) {
	return;
	}

	menu.addAction(i18n("Cancel"));

	const QAction *const chosen = menu.exec(mapToGlobal(e->pos()));

	if (!chosen) {
	return;
	}

	if (chosen == signEncrypt) {
	d->createAndStart<SignEncryptFilesCommand>(files);
	} else if (chosen == decryptVerify) {
	d->createAndStart<DecryptVerifyFilesCommand>(files);
	} else if (chosen == importCerts) {
	d->createAndStart<ImportCertificateFromFileCommand>(files);
	} else if (chosen == importCRLs) {
	d->createAndStart<ImportCrlCommand>(files);
	}

	e->accept();
	}

	void MainWindow::readProperties(const KConfigGroup &cg)
	{
	qCDebug(KLEOPATRA_LOG);
	KXmlGuiWindow::readProperties(cg);
	setHidden(cg.readEntry("hidden", false));
	}

	void MainWindow::saveProperties(KConfigGroup &cg)
	{
	qCDebug(KLEOPATRA_LOG);
	KXmlGuiWindow::saveProperties(cg);
	cg.writeEntry("hidden", isHidden());
	}

	#include "moc_mainwindow.cpp"

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