/*
 * mainwindow.cpp
 * Copyright 2008-2020, Thorbjørn Lindeijer <thorbjorn@lindeijer.nl>
 * Copyright 2008, Roderic Morris <roderic@ccs.neu.edu>
 * Copyright 2009-2010, Jeff Bland <jksb@member.fsf.org>
 * Copyright 2009, Dennis Honeyman <arcticuno@gmail.com>
 * Copyright 2009, Christian Henz <chrhenz@gmx.de>
 * Copyright 2010, Andrew G. Crowell <overkill9999@gmail.com>
 * Copyright 2010-2011, Stefan Beller <stefanbeller@googlemail.com>
 * Copyright 2016, Mamed Ibrahimov <ibramlab@gmail.com>
 *
 * This file is part of Tiled.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include "aboutdialog.h"
#include "actionmanager.h"
#include "addremovetileset.h"
#include "automappingmanager.h"
#include "commandbutton.h"
#include "commandmanager.h"
#include "consoledock.h"
#include "documentmanager.h"
#include "donationpopup.h"
#include "exportasimagedialog.h"
#include "exporthelper.h"
#include "issuescounter.h"
#include "issuesdock.h"
#include "languagemanager.h"
#include "layer.h"
#include "map.h"
#include "mapdocument.h"
#include "mapdocumentactionhandler.h"
#include "mapeditor.h"
#include "mapformat.h"
#include "mapobject.h"
#include "maprenderer.h"
#include "mapscene.h"
#include "mapview.h"
#include "minimaprenderer.h"
#include "newmapdialog.h"
#include "newsbutton.h"
#include "newtilesetdialog.h"
#include "objectgroup.h"
#include "propertytypeseditor.h"
#include "objecttypeseditor.h"
#include "offsetmapdialog.h"
#include "projectdock.h"
#include "projectmanager.h"
#include "projectpropertiesdialog.h"
#include "resizedialog.h"
#include "scriptmanager.h"
#include "sentryhelper.h"
#include "stylehelper.h"
#include "templatesdock.h"
#include "tile.h"
#include "tilelayer.h"
#include "tileset.h"
#include "tilesetdocument.h"
#include "tileseteditor.h"
#include "tilesetmanager.h"
#include "tmxmapformat.h"
#include "undodock.h"
#include "utils.h"
#include "worlddocument.h"
#include "worldmanager.h"
#include "zoomable.h"

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

#include <QActionGroup>
#include <QCloseEvent>
#include <QDesktopServices>
#include <QFileDialog>
#include <QLabel>
#include <QMessageBox>
#include <QMimeData>
#include <QRegularExpression>
#include <QShortcut>
#include <QStandardPaths>
#include <QStatusBar>
#include <QTextStream>
#include <QToolBar>
#include <QToolButton>
#include <QUndoGroup>
#include <QUndoStack>
#include <QUndoView>
#include <QVariantAnimation>

#ifdef Q_OS_WIN
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
#include <QWindow>
#include <QtGui/qpa/qplatformwindow_p.h>
#else
#include <QtPlatformHeaders\QWindowsWindowFunctions>
#endif
#endif // Q_OS_WIN

#include "locatorwidget.h"
#include "qtcompat_p.h"

using namespace Tiled;
using namespace Tiled::Utils;

namespace preferences {
static Preference<QByteArray> mainWindowGeometry { "mainwindow/geometry" };
static Preference<QByteArray> mainWindowState { "mainwindow/state" };
static Preference<bool> mainWindowLocked { "mainwindow/locked" };
} // namespace preferences

namespace {

template <typename Format>
struct ExportDetails
{
    Format *mFormat = nullptr;
    QString mFileName;

    ExportDetails() {}
    ExportDetails(Format *format, const QString& fileName)
        : mFormat(format)
        , mFileName(fileName)
    {}

    bool isValid() const { return mFormat != nullptr; }
};

template <typename Format>
ExportDetails<Format> chooseExportDetails(const QString &fileName,
                                          const QString &lastExportName,
                                          QString &selectedFilter,
                                          QWidget *window)
{
    FormatHelper<Format> helper(FileFormat::Write, MainWindow::tr("All Files (*)"));

    const Session &session = Session::current();

    QString suggestedFilename = lastExportName;

    if (suggestedFilename.isEmpty()) {
        QFileInfo baseNameInfo = QFileInfo(fileName);
        QString baseName = baseNameInfo.baseName();

        QRegularExpression extensionFinder(QLatin1String("\\(\\*\\.([^\\)\\s]*)"));
        QRegularExpressionMatch match = extensionFinder.match(selectedFilter);
        const QString extension = match.captured(1);

        QString lastExportedFilePath = session.lastPath(Session::ExportedFile);

        suggestedFilename = lastExportedFilePath
                            + QLatin1Char('/') + baseName
                            + QLatin1Char('.') + extension;
    }

    // No need to confirm overwrite here since it'll be prompted below
    QString exportToFileName = QFileDialog::getSaveFileName(window, MainWindow::tr("Export As..."),
                                                    suggestedFilename,
                                                    helper.filter(),
                                                    &selectedFilter);
    if (exportToFileName.isEmpty())
        return ExportDetails<Format>();

    // If a specific filter was selected, use that format
    Format *chosenFormat = helper.formatByNameFilter(selectedFilter);

    // If not, try to find the file extension among the name filters
    if (!chosenFormat) {
        for (Format *format : helper.formats()) {
            if (Utils::fileNameMatchesNameFilter(exportToFileName, format->nameFilter())) {
                if (chosenFormat) {
                    QMessageBox::warning(window, MainWindow::tr("Non-unique file extension"),
                                         MainWindow::tr("Non-unique file extension.\n"
                                                        "Please select specific format."));
                    return chooseExportDetails<Format>(exportToFileName, lastExportName, selectedFilter, window);
                } else {
                    chosenFormat = format;
                }
            }
        }
    }

    if (!chosenFormat) {
        QMessageBox::critical(window, MainWindow::tr("Unknown File Format"),
                              MainWindow::tr("The given filename does not have any known "
                                             "file extension."));
        return ExportDetails<Format>();
    }

    return ExportDetails<Format>(chosenFormat, exportToFileName);
}

static void bindToOption(QAction *checkableAction, SessionOption<bool> &option)
{
    checkableAction->setChecked(option);    // Set initial state

    // Update UI when option changes
    const auto it = option.onChange([&option,checkableAction] {
        checkableAction->setChecked(option);
    });

    // Update option when UI changes
    QObject::connect(checkableAction, &QAction::toggled, [&option] (bool checked) {
        option = checked;
    });

    // Disconnect when action is destroyed
    QObject::connect(checkableAction, &QObject::destroyed, [&option,it] {
        option.unregister(it);
    });
}

} // namespace


MainWindow *MainWindow::mInstance;

MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags flags)
    : QMainWindow(parent, flags)
    , mUi(new Ui::MainWindow)
    , mActionHandler(new MapDocumentActionHandler(this))
    , mObjectTypesEditor(new ObjectTypesEditor(this))
    , mPropertyTypesEditor(new PropertyTypesEditor(this))
    , mAutomappingManager(new AutomappingManager(this))
    , mDocumentManager(nullptr)
{
    Q_ASSERT(!mInstance);
    mInstance = this;

    mUi->setupUi(this);

    ActionManager::registerMenu(mUi->menuFile, "File");
    ActionManager::registerMenu(mUi->menuRecentFiles, "RecentFiles");
    ActionManager::registerMenu(mUi->menuNew, "New");
    ActionManager::registerMenu(mUi->menuCommand, "Command");
    ActionManager::registerMenu(mUi->menuEdit, "Edit");
    ActionManager::registerMenu(mUi->menuHelp, "Help");
    ActionManager::registerMenu(mUi->menuMap, "Map");
    ActionManager::registerMenu(mUi->menuUnloadWorld, "UnloadWorld");
    ActionManager::registerMenu(mUi->menuView, "View");
    ActionManager::registerMenu(mUi->menuShowObjectNames, "ShowObjectNames");
    ActionManager::registerMenu(mUi->menuSnapping, "Snapping");
    ActionManager::registerMenu(mUi->menuTileset, "Tileset");

    ActionManager::registerAction(mUi->actionAbout, "About");
    ActionManager::registerAction(mUi->actionAboutQt, "AboutQt");
    ActionManager::registerAction(mUi->actionAddExternalTileset, "AddExternalTileset");
    ActionManager::registerAction(mUi->actionAddFolderToProject, "AddFolderToProject");
    ActionManager::registerAction(mUi->actionAutoMap, "AutoMap");
    ActionManager::registerAction(mUi->actionAutoMapWhileDrawing, "AutoMapWhileDrawing");
    ActionManager::registerAction(mUi->actionClearRecentFiles, "ClearRecentFiles");
    ActionManager::registerAction(mUi->actionClearRecentProjects, "ClearRecentProjects");
    ActionManager::registerAction(mUi->actionClearView, "ClearView");
    ActionManager::registerAction(mUi->actionClose, "Close");
    ActionManager::registerAction(mUi->actionCloseAll, "CloseAll");
    ActionManager::registerAction(mUi->actionCloseProject, "CloseProject");
    ActionManager::registerAction(mUi->actionCopy, "Copy");
    ActionManager::registerAction(mUi->actionCut, "Cut");
    ActionManager::registerAction(mUi->actionDelete, "Delete");
    ActionManager::registerAction(mUi->actionDocumentation, "Documentation");
    ActionManager::registerAction(mUi->actionDonate, "Donate");
    ActionManager::registerAction(mUi->actionEditCommands, "EditCommands");
    ActionManager::registerAction(mUi->actionExport, "Export");
    ActionManager::registerAction(mUi->actionExportAs, "ExportAs");
    ActionManager::registerAction(mUi->actionExportAsImage, "ExportAsImage");
    ActionManager::registerAction(mUi->actionFitInView, "FitInView");
    ActionManager::registerAction(mUi->actionFullScreen, "FullScreen");
    ActionManager::registerAction(mUi->actionHighlightCurrentLayer, "HighlightCurrentLayer");
    ActionManager::registerAction(mUi->actionHighlightHoveredObject, "HighlightHoveredObject");
    ActionManager::registerAction(mUi->actionLabelForHoveredObject, "LabelForHoveredObject");
    ActionManager::registerAction(mUi->actionLabelsForAllObjects, "LabelsForAllObjects");
    ActionManager::registerAction(mUi->actionLabelsForSelectedObjects, "LabelsForSelectedObjects");
    ActionManager::registerAction(mUi->actionLoadWorld, "LoadWorld");
    ActionManager::registerAction(mUi->actionEnableWorlds, "EnableWorlds");
    ActionManager::registerAction(mUi->actionMapProperties, "MapProperties");
    ActionManager::registerAction(mUi->actionNewMap, "NewMap");
    ActionManager::registerAction(mUi->actionNewTileset, "NewTileset");
    ActionManager::registerAction(mUi->actionNewWorld, "NewWorld");
    ActionManager::registerAction(mUi->actionNoLabels, "NoLabels");
    ActionManager::registerAction(mUi->actionOffsetMap, "OffsetMap");
    ActionManager::registerAction(mUi->actionOpen, "Open");
    ActionManager::registerAction(mUi->actionOpenFileInProject, "OpenFileInProject");
    ActionManager::registerAction(mUi->actionOpenProject, "OpenProject");
    ActionManager::registerAction(mUi->actionPaste, "Paste");
    ActionManager::registerAction(mUi->actionPasteInPlace, "PasteInPlace");
    ActionManager::registerAction(mUi->actionPreferences, "Preferences");
    ActionManager::registerAction(mUi->actionProjectProperties, "ProjectProperties");
    ActionManager::registerAction(mUi->actionQuit, "Quit");
    ActionManager::registerAction(mUi->actionRefreshProjectFolders, "RefreshProjectFolders");
    ActionManager::registerAction(mUi->actionReload, "Reload");
    ActionManager::registerAction(mUi->actionReopenClosedFile, "ReopenClosedFile");
    ActionManager::registerAction(mUi->actionResizeMap, "ResizeMap");
    ActionManager::registerAction(mUi->actionSave, "Save");
    ActionManager::registerAction(mUi->actionSaveAll, "SaveAll");
    ActionManager::registerAction(mUi->actionSaveAs, "SaveAs");
    ActionManager::registerAction(mUi->actionSaveProjectAs, "SaveProjectAs");
    ActionManager::registerAction(mUi->actionShowGrid, "ShowGrid");
    ActionManager::registerAction(mUi->actionShowObjectReferences, "ShowObjectReferences");
    ActionManager::registerAction(mUi->actionShowTileAnimations, "ShowTileAnimations");
    ActionManager::registerAction(mUi->actionShowTileCollisionShapes, "ShowTileCollisionShapes");
    ActionManager::registerAction(mUi->actionShowTileObjectOutlines, "ShowTileObjectOutlines");
    ActionManager::registerAction(mUi->actionEnableParallax, "EnableParallax");
    ActionManager::registerAction(mUi->actionSnapNothing, "SnapNothing");
    ActionManager::registerAction(mUi->actionSnapToFineGrid, "SnapToFineGrid");
    ActionManager::registerAction(mUi->actionSnapToGrid, "SnapToGrid");
    ActionManager::registerAction(mUi->actionSnapToPixels, "SnapToPixels");
    ActionManager::registerAction(mUi->actionTilesetProperties, "TilesetProperties");
    ActionManager::registerAction(mUi->actionZoomIn, "ZoomIn");
    ActionManager::registerAction(mUi->actionZoomNormal, "ZoomNormal");
    ActionManager::registerAction(mUi->actionZoomOut, "ZoomOut");

    // Created after registering all the main window actions, since the
    // NoEditorWidget uses some of those actions.
    mDocumentManager = new DocumentManager(this);

#ifdef Q_OS_MAC
    MacSupport::addFullscreen(this);
#endif

    Preferences *preferences = Preferences::instance();

    QIcon openIcon(QLatin1String(":images/16/document-open.png"));
    QIcon saveIcon(QLatin1String(":images/16/document-save.png"));
    QIcon redoIcon(QLatin1String(":images/16/edit-redo.png"));
    QIcon undoIcon(QLatin1String(":images/16/edit-undo.png"));
    QIcon highlightCurrentLayerIcon(QLatin1String("://images/scalable/highlight-current-layer-16.svg"));

    openIcon.addFile(QLatin1String(":images/24/document-open.png"));
    saveIcon.addFile(QLatin1String(":images/24/document-save.png"));
    highlightCurrentLayerIcon.addFile(QLatin1String("://images/scalable/highlight-current-layer-24.svg"));

#ifndef Q_OS_MAC
    QIcon tiledIcon(QLatin1String(":images/16/tiled.png"));
    tiledIcon.addFile(QLatin1String(":images/32/tiled.png"));
    setWindowIcon(tiledIcon);
#endif

    mUi->actionOpen->setIcon(openIcon);
    mUi->actionSave->setIcon(saveIcon);

    QUndoGroup *undoGroup = mDocumentManager->undoGroup();
    QAction *undoAction = undoGroup->createUndoAction(this, tr("Undo"));
    QAction *redoAction = undoGroup->createRedoAction(this, tr("Redo"));
    redoAction->setPriority(QAction::LowPriority);
    redoAction->setIcon(redoIcon);
    undoAction->setIcon(undoIcon);

    mUi->actionNewMap->setShortcuts(QKeySequence::New);
    mUi->actionOpen->setShortcuts(QKeySequence::Open);
    mUi->actionSave->setShortcuts(QKeySequence::Save);
    mUi->actionClose->setShortcuts(QKeySequence::Close);
    mUi->actionQuit->setShortcut(Qt::CTRL + Qt::Key_Q);
    mUi->actionCut->setShortcuts(QKeySequence::Cut);
    mUi->actionCopy->setShortcuts(QKeySequence::Copy);
    mUi->actionPaste->setShortcuts(QKeySequence::Paste);
    QList<QKeySequence> deleteKeys = QKeySequence::keyBindings(QKeySequence::Delete);
    deleteKeys.removeAll(Qt::Key_D | Qt::ControlModifier);  // used as "duplicate" shortcut
#ifdef Q_OS_OSX
    // Add the Backspace key as primary shortcut for Delete, which seems to be
    // the expected one for OS X.
    if (!deleteKeys.contains(QKeySequence(Qt::Key_Backspace)))
        deleteKeys.prepend(QKeySequence(Qt::Key_Backspace));
#endif
    mUi->actionDelete->setShortcuts(deleteKeys);

    QList<QKeySequence> redoShortcuts = QKeySequence::keyBindings(QKeySequence::Redo);
    const QKeySequence ctrlY(Qt::Key_Y | Qt::ControlModifier);
    if (!redoShortcuts.contains(ctrlY))
        redoShortcuts.append(ctrlY);

    undoAction->setShortcuts(QKeySequence::Undo);
    redoAction->setShortcuts(redoShortcuts);

    ActionManager::registerAction(undoAction, "Undo");
    ActionManager::registerAction(redoAction, "Redo");

    mProjectDock = new ProjectDock(this);   // uses some actions registered above
    mConsoleDock = new ConsoleDock(this);
    mIssuesDock = new IssuesDock(this);

    addDockWidget(Qt::LeftDockWidgetArea, mProjectDock);
    addDockWidget(Qt::BottomDockWidgetArea, mConsoleDock);
    addDockWidget(Qt::BottomDockWidgetArea, mIssuesDock);
    tabifyDockWidget(mConsoleDock, mIssuesDock);

    mConsoleDock->setVisible(false);
    mIssuesDock->setVisible(false);

    mMapEditor = new MapEditor;
    mTilesetEditor = new TilesetEditor;

    connect(mMapEditor, &Editor::enabledStandardActionsChanged, this, &MainWindow::updateActions);
    connect(mTilesetEditor, &Editor::enabledStandardActionsChanged, this, &MainWindow::updateActions);

    mDocumentManager->setEditor(Document::MapDocumentType, mMapEditor);
    mDocumentManager->setEditor(Document::TilesetDocumentType, mTilesetEditor);

    setCentralWidget(mDocumentManager->widget());

    connect(mProjectDock, &ProjectDock::folderAdded, this, &MainWindow::updateActions);
    connect(mProjectDock, &ProjectDock::folderRemoved, this, &MainWindow::updateActions);
    connect(mProjectDock, &ProjectDock::fileSelected,
            mMapEditor->templatesDock(), &TemplatesDock::tryOpenTemplate);
    connect(mProjectDock, &ProjectDock::fileSelected,
            mTilesetEditor->templatesDock(), &TemplatesDock::tryOpenTemplate);

    auto snappingGroup = new QActionGroup(this);
    mUi->actionSnapNothing->setActionGroup(snappingGroup);
    mUi->actionSnapToGrid->setActionGroup(snappingGroup);
    mUi->actionSnapToFineGrid->setActionGroup(snappingGroup);
    mUi->actionSnapToPixels->setActionGroup(snappingGroup);

    mUi->actionShowGrid->setChecked(preferences->showGrid());
    mUi->actionShowTileObjectOutlines->setChecked(preferences->showTileObjectOutlines());
    mUi->actionShowObjectReferences->setChecked(preferences->showObjectReferences());
    mUi->actionShowTileAnimations->setChecked(preferences->showTileAnimations());
    mUi->actionShowTileCollisionShapes->setChecked(preferences->showTileCollisionShapes());
    mUi->actionEnableParallax->setChecked(preferences->parallaxEnabled());
    mUi->actionSnapToGrid->setChecked(preferences->snapToGrid());
    mUi->actionSnapToFineGrid->setChecked(preferences->snapToFineGrid());
    mUi->actionSnapToPixels->setChecked(preferences->snapToPixels());
    mUi->actionHighlightCurrentLayer->setChecked(preferences->highlightCurrentLayer());
    mUi->actionHighlightHoveredObject->setChecked(preferences->highlightHoveredObject());

    bindToOption(mUi->actionAutoMapWhileDrawing, AutomappingManager::automappingWhileDrawing);
    bindToOption(mUi->actionEnableWorlds, MapScene::enableWorlds);

    mUi->actionHighlightCurrentLayer->setIcon(highlightCurrentLayerIcon);
    mUi->actionHighlightCurrentLayer->setIconVisibleInMenu(false);

#ifdef Q_OS_MAC
    mUi->actionFullScreen->setShortcuts(QKeySequence::FullScreen);
#endif

    QActionGroup *objectLabelVisibilityGroup = new QActionGroup(this);
    mUi->actionNoLabels->setActionGroup(objectLabelVisibilityGroup);
    mUi->actionLabelsForSelectedObjects->setActionGroup(objectLabelVisibilityGroup);
    mUi->actionLabelsForAllObjects->setActionGroup(objectLabelVisibilityGroup);

    switch (preferences->objectLabelVisibility()) {
    case Preferences::NoObjectLabels:
        mUi->actionNoLabels->setChecked(true);
        break;
    case Preferences::SelectedObjectLabels:
        mUi->actionLabelsForSelectedObjects->setChecked(true);
        break;
    case Preferences::AllObjectLabels:
        mUi->actionLabelsForAllObjects->setChecked(true);
        break;
    }

    connect(objectLabelVisibilityGroup, &QActionGroup::triggered,
            this, &MainWindow::labelVisibilityActionTriggered);

    mUi->actionLabelForHoveredObject->setChecked(preferences->labelForHoveredObject());
    connect(mUi->actionLabelForHoveredObject, &QAction::triggered,
            preferences, &Preferences::setLabelForHoveredObject);

    QShortcut *reloadTilesetsShortcut = new QShortcut(Qt::CTRL + Qt::Key_T, this);
    connect(reloadTilesetsShortcut, &QShortcut::activated,
            this, &MainWindow::reloadTilesetImages);

    // Make sure Ctrl+= also works for zooming in
    QList<QKeySequence> keys = QKeySequence::keyBindings(QKeySequence::ZoomIn);
    keys += QKeySequence(Qt::CTRL + Qt::Key_Equal);
    keys += QKeySequence(Qt::Key_Plus);
    mUi->actionZoomIn->setShortcuts(keys);
    keys = QKeySequence::keyBindings(QKeySequence::ZoomOut);
    keys += QKeySequence(Qt::Key_Minus);
    mUi->actionZoomOut->setShortcuts(keys);

    mUi->menuEdit->insertAction(mUi->actionCut, undoAction);
    mUi->menuEdit->insertAction(mUi->actionCut, redoAction);
    mUi->menuEdit->insertSeparator(mUi->actionCut);
    mUi->menuEdit->insertAction(mUi->actionPreferences,
                                mActionHandler->actionSelectAll());
    mUi->menuEdit->insertAction(mUi->actionPreferences,
                                mActionHandler->actionSelectInverse());
    mUi->menuEdit->insertAction(mUi->actionPreferences,
                                mActionHandler->actionSelectNone());
    mUi->menuEdit->insertSeparator(mUi->actionPreferences);

    mUi->menuMap->insertAction(mUi->actionOffsetMap,
                               mActionHandler->actionCropToSelection());
    mUi->menuMap->insertAction(mUi->actionOffsetMap,
                               mActionHandler->actionAutocrop());

    mUi->menuMap->insertAction(mUi->actionMapProperties,
                               mMapEditor->actionSelectNextTileset());
    mUi->menuMap->insertAction(mUi->actionMapProperties,
                               mMapEditor->actionSelectPreviousTileset());
    mUi->menuMap->insertSeparator(mUi->actionMapProperties);

    mLayerMenu = new QMenu(tr("&Layer"), this);
    mNewLayerMenu = mActionHandler->createNewLayerMenu(mLayerMenu);
    mGroupLayerMenu = mActionHandler->createGroupLayerMenu(mLayerMenu);
    mLayerMenu->addMenu(mNewLayerMenu);
    mLayerMenu->addMenu(mGroupLayerMenu);
    mLayerMenu->addAction(mActionHandler->actionDuplicateLayers());
    mLayerMenu->addAction(mActionHandler->actionMergeLayersDown());
    mLayerMenu->addAction(mActionHandler->actionRemoveLayers());
    mLayerMenu->addSeparator();
    mLayerMenu->addAction(mActionHandler->actionSelectPreviousLayer());
    mLayerMenu->addAction(mActionHandler->actionSelectNextLayer());
    mLayerMenu->addAction(mActionHandler->actionSelectAllLayers());
    mLayerMenu->addAction(mActionHandler->actionMoveLayersUp());
    mLayerMenu->addAction(mActionHandler->actionMoveLayersDown());
    mLayerMenu->addSeparator();
    mLayerMenu->addAction(mActionHandler->actionToggleSelectedLayers());
    mLayerMenu->addAction(mActionHandler->actionToggleLockSelectedLayers());
    mLayerMenu->addAction(mActionHandler->actionToggleOtherLayers());
    mLayerMenu->addAction(mActionHandler->actionToggleLockOtherLayers());
    mLayerMenu->addSeparator();
    mLayerMenu->addAction(mActionHandler->actionLayerProperties());

    menuBar()->insertMenu(mUi->menuProject->menuAction(), mLayerMenu);

    ActionManager::registerMenu(mLayerMenu, "Layer");
    ActionManager::registerMenu(mNewLayerMenu, "NewLayer");
    ActionManager::registerMenu(mGroupLayerMenu, "GroupLayer");

    connect(mUi->actionNewMap, &QAction::triggered, this, &MainWindow::newMap);
    connect(mUi->actionNewTileset, &QAction::triggered, this, [this] { newTileset(); });
    connect(mUi->actionOpen, &QAction::triggered, this, &MainWindow::openFileDialog);
    connect(mUi->actionOpenFileInProject, &QAction::triggered, this, &MainWindow::openFileInProject);
    connect(mUi->actionReopenClosedFile, &QAction::triggered, this, &MainWindow::reopenClosedFile);
    connect(mUi->actionClearRecentFiles, &QAction::triggered, preferences, &Preferences::clearRecentFiles);
    connect(mUi->actionSave, &QAction::triggered, this, &MainWindow::saveFile);
    connect(mUi->actionSaveAs, &QAction::triggered, this, &MainWindow::saveFileAs);
    connect(mUi->actionSaveAll, &QAction::triggered, this, &MainWindow::saveAll);
    connect(mUi->actionExportAsImage, &QAction::triggered, this, &MainWindow::exportAsImage);
    connect(mUi->actionExport, &QAction::triggered, this, &MainWindow::export_);
    connect(mUi->actionExportAs, &QAction::triggered, this, &MainWindow::exportAs);
    connect(mUi->actionReload, &QAction::triggered, this, &MainWindow::reload);
    connect(mUi->actionClose, &QAction::triggered, this, &MainWindow::closeFile);
    connect(mUi->actionCloseAll, &QAction::triggered, this, &MainWindow::closeAllFiles);
    connect(mUi->actionQuit, &QAction::triggered, this, &QWidget::close);

    connect(mUi->actionCut, &QAction::triggered, this, &MainWindow::cut);
    connect(mUi->actionCopy, &QAction::triggered, this, &MainWindow::copy);
    connect(mUi->actionPaste, &QAction::triggered, this, &MainWindow::paste);
    connect(mUi->actionPasteInPlace, &QAction::triggered, this, &MainWindow::pasteInPlace);
    connect(mUi->actionDelete, &QAction::triggered, this, &MainWindow::delete_);
    connect(mUi->actionPreferences, &QAction::triggered, this, &MainWindow::openPreferences);

    connect(mUi->actionShowGrid, &QAction::toggled,
            preferences, &Preferences::setShowGrid);
    connect(mUi->actionShowTileObjectOutlines, &QAction::toggled,
            preferences, &Preferences::setShowTileObjectOutlines);
    connect(mUi->actionShowObjectReferences, &QAction::toggled,
            preferences, &Preferences::setShowObjectReferences);
    connect(mUi->actionShowTileAnimations, &QAction::toggled,
            preferences, &Preferences::setShowTileAnimations);
    connect(mUi->actionShowTileCollisionShapes, &QAction::toggled,
            preferences, &Preferences::setShowTileCollisionShapes);
    connect(mUi->actionEnableParallax, &QAction::toggled,
            preferences, &Preferences::setParallaxEnabled);
    connect(mUi->actionSnapToGrid, &QAction::toggled,
            preferences, &Preferences::setSnapToGrid);
    connect(mUi->actionSnapToFineGrid, &QAction::toggled,
            preferences, &Preferences::setSnapToFineGrid);
    connect(mUi->actionSnapToPixels, &QAction::toggled,
            preferences, &Preferences::setSnapToPixels);
    connect(mUi->actionHighlightCurrentLayer, &QAction::toggled,
            preferences, &Preferences::setHighlightCurrentLayer);
    connect(mUi->actionHighlightHoveredObject, &QAction::toggled,
            preferences, &Preferences::setHighlightHoveredObject);
    connect(mUi->actionZoomIn, &QAction::triggered, this, &MainWindow::zoomIn);
    connect(mUi->actionZoomOut, &QAction::triggered, this, &MainWindow::zoomOut);
    connect(mUi->actionZoomNormal, &QAction::triggered, this, &MainWindow::zoomNormal);
    connect(mUi->actionFitInView, &QAction::triggered, this, &MainWindow::fitInView);
    connect(mUi->actionFullScreen, &QAction::toggled, this, &MainWindow::setFullScreen);
    connect(mUi->actionClearView, &QAction::toggled, this, &MainWindow::toggleClearView);

    CommandManager::instance()->registerMenu(mUi->menuCommand);

    connect(mUi->actionAddExternalTileset, &QAction::triggered,
            this, &MainWindow::addExternalTileset);
    connect(mUi->actionLoadWorld, &QAction::triggered, this, [this] {
        Session &session = Session::current();
        QString lastPath = session.lastPath(Session::WorldFile);
        QString filter = tr("All Files (*)");
        filter.append(QStringLiteral(";;"));
        QString worldFilesFilter = tr("World files (*.world)");
        filter.append(worldFilesFilter);
        QString worldFile = QFileDialog::getOpenFileName(this, tr("Load World"), lastPath,
                                                         filter, &worldFilesFilter);
        if (worldFile.isEmpty())
            return;

        session.setLastPath(Session::WorldFile, QFileInfo(worldFile).path());
        QString errorString;
        if (!WorldManager::instance().loadWorld(worldFile, &errorString))
            QMessageBox::critical(this, tr("Error Loading World"), errorString);
        else
            mLoadedWorlds = WorldManager::instance().worlds().keys();
    });
    connect(mUi->menuUnloadWorld, &QMenu::aboutToShow, this, [this] {
        mUi->menuUnloadWorld->clear();

        for (const World *world : WorldManager::instance().worlds()) {
            QString text = world->fileName;
            if (mDocumentManager->isWorldModified(world->fileName))
                text.append(QLatin1Char('*'));

            mUi->menuUnloadWorld->addAction(text, this, [this, fileName = world->fileName] {
                if (!confirmSaveWorld(fileName))
                    return;

                WorldManager::instance().unloadWorld(fileName);
                mLoadedWorlds = WorldManager::instance().worlds().keys();
            });
        }
    });
    connect(mUi->actionNewWorld, &QAction::triggered, this, [this] {
        Session &session = Session::current();
        QString lastPath = session.lastPath(Session::WorldFile);
        QString filter = tr("All Files (*)");
        filter.append(QStringLiteral(";;"));
        QString worldFilesFilter = tr("World files (*.world)");
        filter.append(worldFilesFilter);
        QString worldFile;

        QFileDialog dialog(this, tr("New World"), lastPath, filter);
        dialog.setAcceptMode(QFileDialog::AcceptSave);
        dialog.selectNameFilter(worldFilesFilter);
        dialog.setDefaultSuffix(QStringLiteral("world"));
        if (dialog.exec() == QDialog::Accepted)
            worldFile = dialog.selectedFiles().value(0);

        if (worldFile.isEmpty())
            return;

        session.setLastPath(Session::WorldFile, QFileInfo(worldFile).path());
        QString errorString;
        if (!WorldManager::instance().addEmptyWorld(worldFile, &errorString))
            QMessageBox::critical(this, tr("Error Creating World"), errorString);
        else
            mLoadedWorlds = WorldManager::instance().worlds().keys();
    });
    connect(mUi->menuSaveWorld, &QMenu::aboutToShow, this, [this] {
        mUi->menuSaveWorld->clear();

        for (const World *world : WorldManager::instance().worlds()) {
            if (!mDocumentManager->isWorldModified(world->fileName))
                continue;

            mUi->menuSaveWorld->addAction(world->fileName, this, [this, fileName = world->fileName] {
                QString error;
                if (!WorldManager::instance().saveWorld(fileName, &error))
                    QMessageBox::critical(this, tr("Error Writing World File"), error);

                DocumentManager::instance()->ensureWorldDocument(fileName)->undoStack()->setClean();
            });
        }
    });
    connect(mUi->menuMap, &QMenu::aboutToShow, this, [this] {
        mUi->menuUnloadWorld->setEnabled(!WorldManager::instance().worlds().isEmpty());
        mUi->menuSaveWorld->setEnabled(DocumentManager::instance()->isAnyWorldModified());
    });
    connect(mUi->actionResizeMap, &QAction::triggered, this, &MainWindow::resizeMap);
    connect(mUi->actionOffsetMap, &QAction::triggered, this, &MainWindow::offsetMap);
    connect(mUi->actionAutoMap, &QAction::triggered,
            mAutomappingManager, &AutomappingManager::autoMap);
    connect(mUi->actionMapProperties, &QAction::triggered,
            this, &MainWindow::editMapProperties);

    connect(mUi->actionTilesetProperties, &QAction::triggered,
            this, &MainWindow::editTilesetProperties);

    connect(mUi->actionOpenProject, &QAction::triggered, this, &MainWindow::openProject);
    connect(mUi->actionSaveProjectAs, &QAction::triggered, this, &MainWindow::saveProjectAs);
    connect(mUi->actionCloseProject, &QAction::triggered, this, &MainWindow::closeProject);
    connect(mUi->actionAddFolderToProject, &QAction::triggered, mProjectDock, &ProjectDock::addFolderToProject);
    connect(mUi->actionRefreshProjectFolders, &QAction::triggered, mProjectDock, &ProjectDock::refreshProjectFolders);
    connect(mUi->actionClearRecentProjects, &QAction::triggered, preferences, &Preferences::clearRecentProjects);
    connect(mUi->actionProjectProperties, &QAction::triggered, this, &MainWindow::projectProperties);

    connect(mUi->actionDocumentation, &QAction::triggered, this, &MainWindow::openDocumentation);
    connect(mUi->actionForum, &QAction::triggered, this, &MainWindow::openForum);
    connect(mUi->actionDonate, &QAction::triggered, this, [] {
        QDesktopServices::openUrl(QUrl(QLatin1String("https://www.mapeditor.org/donate")));
    });
    connect(mUi->actionAbout, &QAction::triggered, this, &MainWindow::aboutTiled);
    connect(mUi->actionAboutQt, &QAction::triggered, qApp, &QApplication::aboutQt);

    // Add recent file actions to the recent files menu
    for (auto &action : mRecentFiles) {
         action = new QAction(this);
         mUi->menuRecentFiles->insertAction(mUi->actionClearRecentFiles,
                                            action);
         action->setVisible(false);
         connect(action, &QAction::triggered,
                 this, &MainWindow::openRecentFile);
    }
    mUi->menuRecentFiles->insertSeparator(mUi->actionClearRecentFiles);

    setThemeIcon(mUi->menuNew, "document-new");
    setThemeIcon(mUi->actionOpen, "document-open");
    setThemeIcon(mUi->menuRecentFiles, "document-open-recent");
    setThemeIcon(mUi->actionClearRecentFiles, "edit-clear");
    setThemeIcon(mUi->actionClearRecentProjects, "edit-clear");
    setThemeIcon(mUi->actionSave, "document-save");
    setThemeIcon(mUi->actionSaveAs, "document-save-as");
    setThemeIcon(mUi->actionClose, "window-close");
    setThemeIcon(mUi->actionQuit, "application-exit");
    setThemeIcon(mUi->actionCut, "edit-cut");
    setThemeIcon(mUi->actionCopy, "edit-copy");
    setThemeIcon(mUi->actionPaste, "edit-paste");
    setThemeIcon(mUi->actionDelete, "edit-delete");
    setThemeIcon(redoAction, "edit-redo");
    setThemeIcon(undoAction, "edit-undo");
    setThemeIcon(mUi->actionZoomIn, "zoom-in");
    setThemeIcon(mUi->actionZoomOut, "zoom-out");
    setThemeIcon(mUi->actionZoomNormal, "zoom-original");
    setThemeIcon(mUi->actionFitInView, "zoom-fit-best");
    setThemeIcon(mUi->actionResizeMap, "document-page-setup");
    setThemeIcon(mUi->actionMapProperties, "document-properties");
    setThemeIcon(mUi->actionOpenProject, "document-open");
    setThemeIcon(mUi->menuRecentProjects, "document-open-recent");
    setThemeIcon(mUi->actionSaveProjectAs, "document-save-as");
    setThemeIcon(mUi->actionCloseProject, "window-close");
    setThemeIcon(mUi->actionAddFolderToProject, "folder-new");
    setThemeIcon(mUi->actionRefreshProjectFolders, "view-refresh");
    setThemeIcon(mUi->actionProjectProperties, "document-properties");
    setThemeIcon(mUi->actionDocumentation, "help-contents");
    setThemeIcon(mUi->actionAbout, "help-about");

    // Set up the status bar (see also currentEditorChanged)
    auto myStatusBar = statusBar();
    myStatusBar->addPermanentWidget(new NewsButton(myStatusBar));
    myStatusBar->addPermanentWidget(new NewVersionButton(NewVersionButton::AutoVisible, myStatusBar));

    QIcon terminalIcon(QLatin1String("://images/24/terminal.png"));
    terminalIcon.addFile(QLatin1String("://images/16/terminal.png"));
    terminalIcon.addFile(QLatin1String("://images/32/terminal.png"));

    auto toggleConsoleAction = mConsoleDock->toggleViewAction();
    toggleConsoleAction->setIcon(terminalIcon);
    toggleConsoleAction->setIconVisibleInMenu(false);

    auto consoleToggleButton = new QToolButton;
    consoleToggleButton->setDefaultAction(toggleConsoleAction);
    consoleToggleButton->setAutoRaise(true);
    connect(toggleConsoleAction, &QAction::toggled, this, [this] (bool checked) {
        if (checked) {
            mConsoleDock->show();
            if (!mIssuesDock->isFloating() && tabifiedDockWidgets(mConsoleDock).contains(mIssuesDock))
                mIssuesDock->hide();
            mConsoleDock->raise();
        }
    });

    auto issuesCounter = new IssuesCounter(myStatusBar);
    issuesCounter->setDefaultAction(mIssuesDock->toggleViewAction());
    connect(mIssuesDock->toggleViewAction(), &QAction::toggled, this, [this] (bool checked) {
        if (checked) {
            mIssuesDock->show();
            if (!mConsoleDock->isFloating() && tabifiedDockWidgets(mIssuesDock).contains(mConsoleDock))
                mConsoleDock->hide();
            mIssuesDock->raise();
        }
    });

    myStatusBar->addWidget(consoleToggleButton);
    myStatusBar->addWidget(issuesCounter);

    // Add the 'Views and Toolbars' submenu. This needs to happen after all
    // the dock widgets and toolbars have been added to the main window.
    mViewsAndToolbarsMenu = new QMenu(this);
    mViewsAndToolbarsAction = new QAction(tr("Views and Toolbars"), this);
    mViewsAndToolbarsAction->setMenu(mViewsAndToolbarsMenu);

    mResetToDefaultLayout = new QAction(tr("Reset to Default Layout"), this);
    mLockLayout = new QAction(tr("Lock Layout"), this);
    mLockLayout->setCheckable(true);
    QIcon lockIcon;
    lockIcon.addFile(QLatin1String(":/images/14/locked.png"));
    lockIcon.addFile(QLatin1String(":/images/16/locked.png"));
    lockIcon.addFile(QLatin1String(":/images/24/locked.png"));
    mLockLayout->setIcon(lockIcon);

    ActionManager::registerAction(mResetToDefaultLayout, "ResetToDefaultLayout");
    ActionManager::registerAction(mLockLayout, "LockLayout");

    mShowObjectTypesEditor = new QAction(tr("Object Types Editor"), this);
    mShowObjectTypesEditor->setCheckable(true);

    mShowPropertyTypesEditor = new QAction(tr("Property Types Editor"), this);
    mShowPropertyTypesEditor->setCheckable(true);

    mUi->menuView->insertAction(mUi->actionShowGrid, mViewsAndToolbarsAction);
    mUi->menuView->insertAction(mUi->actionShowGrid, mShowObjectTypesEditor);
    mUi->menuView->insertAction(mUi->actionShowGrid, mShowPropertyTypesEditor);
    mUi->menuView->insertSeparator(mUi->actionShowGrid);

    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->showAnimationEditor());
    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->relocateTilesAction());
    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->editCollisionAction());
    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->editWangSetsAction());
    mUi->menuTileset->insertSeparator(mUi->actionTilesetProperties);
    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->addTilesAction());
    mUi->menuTileset->insertAction(mUi->actionTilesetProperties, mTilesetEditor->removeTilesAction());
    mUi->menuTileset->insertSeparator(mUi->actionTilesetProperties);

    connect(mViewsAndToolbarsMenu, &QMenu::aboutToShow,
            this, &MainWindow::updateViewsAndToolbarsMenu);

    connect(mShowObjectTypesEditor, &QAction::toggled,
            mObjectTypesEditor, &QWidget::setVisible);
    connect(mObjectTypesEditor, &ObjectTypesEditor::closed,
            this, &MainWindow::onObjectTypesEditorClosed);

    connect(mShowPropertyTypesEditor, &QAction::toggled,
            mPropertyTypesEditor, &QWidget::setVisible);
    connect(mPropertyTypesEditor, &PropertyTypesEditor::closed,
            this, &MainWindow::onPropertyTypesEditorClosed);

    connect(ClipboardManager::instance(), &ClipboardManager::hasMapChanged,
            this, &MainWindow::updateActions);

    connect(mDocumentManager, &DocumentManager::fileOpenRequested,
            this, [this] (const QString &path) { openFile(path); });
    connect(mDocumentManager, &DocumentManager::fileOpenDialogRequested,
            this, &MainWindow::openFileDialog);
    connect(mDocumentManager, &DocumentManager::fileSaveRequested,
            this, &MainWindow::saveFile);
    connect(mDocumentManager, &DocumentManager::currentDocumentChanged,
            this, &MainWindow::documentChanged);
    connect(mDocumentManager, &DocumentManager::documentCloseRequested,
            this, &MainWindow::closeDocument);
    connect(mDocumentManager, &DocumentManager::reloadError,
            this, &MainWindow::reloadError);
    connect(mDocumentManager, &DocumentManager::documentSaved,
            this, &MainWindow::documentSaved);
    connect(mDocumentManager, &DocumentManager::currentEditorChanged,
            this, &MainWindow::currentEditorChanged);

    connect(mResetToDefaultLayout, &QAction::triggered, this, &MainWindow::resetToDefaultLayout);
    connect(mLockLayout, &QAction::toggled, this, &MainWindow::setLayoutLocked);

    QShortcut *switchToLeftDocument = new QShortcut(Qt::ALT + Qt::Key_Left, this);
    connect(switchToLeftDocument, &QShortcut::activated,
            mDocumentManager, &DocumentManager::switchToLeftDocument);
    QShortcut *switchToLeftDocument1 = new QShortcut((Qt::CTRL | Qt::SHIFT) + Qt::Key_Tab, this);
    connect(switchToLeftDocument1, &QShortcut::activated,
            mDocumentManager, &DocumentManager::switchToLeftDocument);

    QShortcut *switchToRightDocument = new QShortcut(Qt::ALT + Qt::Key_Right, this);
    connect(switchToRightDocument, &QShortcut::activated,
            mDocumentManager, &DocumentManager::switchToRightDocument);
    QShortcut *switchToRightDocument1 = new QShortcut(Qt::CTRL + Qt::Key_Tab, this);
    connect(switchToRightDocument1, &QShortcut::activated,
            mDocumentManager, &DocumentManager::switchToRightDocument);

    connect(qApp, &QApplication::commitDataRequest, this, &MainWindow::commitData);

    QShortcut *copyPositionShortcut = new QShortcut(Qt::ALT + Qt::Key_C, this);
    connect(copyPositionShortcut, &QShortcut::activated,
            mActionHandler, &MapDocumentActionHandler::copyPosition);

    updateActions();
    updateZoomActions();
    readSettings();

    connect(mAutomappingManager, &AutomappingManager::warningsOccurred,
            this, &MainWindow::autoMappingWarning);
    connect(mAutomappingManager, &AutomappingManager::errorsOccurred,
            this, &MainWindow::autoMappingError);

#ifdef Q_OS_WIN
    connect(preferences, &Preferences::useOpenGLChanged, this, &MainWindow::ensureHasBorderInFullScreen);
#endif

    connect(preferences, &Preferences::recentFilesChanged, this, &MainWindow::updateRecentFilesMenu);
    connect(preferences, &Preferences::recentProjectsChanged, this, &MainWindow::updateRecentProjectsMenu);

    QTimer::singleShot(500, this, [this,preferences] {
#ifdef TILED_SENTRY
        if (Sentry::instance()->userConsent() == Sentry::ConsentUnknown)
            openCrashReporterPopup();
#endif

        if (preferences->shouldShowDonationReminder())
            showDonationPopup();
    });
}

MainWindow::~MainWindow()
{
    emit Preferences::instance()->aboutToSwitchSession();

    mDocumentManager->closeAllDocuments();
    mDocumentManager->deleteEditors();

    delete mUi;

    Q_ASSERT(mInstance == this);
    mInstance = nullptr;
}

void MainWindow::commitData(QSessionManager &manager)
{
    // Play nice with session management and cancel shutdown process when user
    // requests this
    if (manager.allowsInteraction())
        if (!confirmAllSave())
            manager.cancel();
}

bool MainWindow::event(QEvent *event)
{
#ifdef Q_OS_WIN
    if (event->type() == QEvent::WinIdChange)
        ensureHasBorderInFullScreen();
#endif

    return QMainWindow::event(event);
}

void MainWindow::closeEvent(QCloseEvent *event)
{
    if (confirmAllSave()) {
        // Make sure user won't end up in Clear View mode on next launch
        toggleClearView(false);
        writeSettings();
        event->accept();
    } else {
        event->ignore();
    }
}

void MainWindow::changeEvent(QEvent *event)
{
    QMainWindow::changeEvent(event);
    switch (event->type()) {
    case QEvent::LanguageChange:
        mUi->retranslateUi(this);
        retranslateUi();
        break;
    case QEvent::WindowStateChange:
        mUi->actionFullScreen->setChecked(isFullScreen());
        break;
    default:
        break;
    }
}

void MainWindow::keyPressEvent(QKeyEvent *event)
{
    if (event->isAutoRepeat())
        return;

    if (MapView *mapView = mDocumentManager->currentMapView()) {
        switch (event->key()) {
        case Qt::Key_Space:
            mapView->setScrollingMode(MapView::DragScrolling);
            break;
        }
    }
}

void MainWindow::keyReleaseEvent(QKeyEvent *event)
{
    if (event->isAutoRepeat())
        return;

    if (MapView *mapView = mDocumentManager->currentMapView()) {
        switch (event->key()) {
        case Qt::Key_Space:
            mapView->setScrollingMode(MapView::NoScrolling);
            break;
        }
    }
}

void MainWindow::dragEnterEvent(QDragEnterEvent *e)
{
    const QList<QUrl> urls = e->mimeData()->urls();
    if (!urls.isEmpty() && !urls.first().toLocalFile().isEmpty())
        e->accept();
}

void MainWindow::dropEvent(QDropEvent *e)
{
    const auto urls = e->mimeData()->urls();
    for (const QUrl &url : urls) {
        const QString localFile = url.toLocalFile();
        if (localFile.isEmpty())
            continue;

        openFile(localFile);
    }
}

void MainWindow::resizeEvent(QResizeEvent *e)
{
    if (mPopupWidget)
        updatePopupGeometry(e->size());
}

void MainWindow::newMap()
{
    NewMapDialog newMapDialog(this);
    MapDocumentPtr mapDocument = newMapDialog.createMap();

    if (!mapDocument)
        return;

    emit mDocumentManager->documentCreated(mapDocument.data());

    mDocumentManager->addDocument(mapDocument);
}

void MainWindow::initializeSession()
{
    const auto &session = Session::current();

    // Restore associated project if applicable
    Project project;
    bool projectLoaded = !session.project.isEmpty() && project.load(session.project);

    if (projectLoaded) {
        ProjectManager::instance()->setProject(std::move(project));
        updateWindowTitle();
        updateActions();
    }

    // Script manager initialization is delayed until after the project has
    // been loaded, to avoid immediately having to reset the engine again after
    // adding the project's extension path.
    ScriptManager::instance().ensureInitialized();

    if (projectLoaded || Preferences::instance()->restoreSessionOnStartup())
        restoreSession();
}

bool MainWindow::openFile(const QString &fileName, FileFormat *fileFormat)
{
    if (fileName.isEmpty())
        return false;

    if (fileName.endsWith(QLatin1String(".tiled-project")))
        return openProjectFile(fileName);

    // HACK: World files can't open as document, but we can instead open the
    // first map in the world.
    if (fileName.endsWith(QLatin1String(".world"))) {
        auto &worldManager = WorldManager::instance();

        QString errorString;
        World *world = worldManager.loadWorld(fileName, &errorString);
        if (!world) {
            QMessageBox::critical(this, tr("Error Loading World"), errorString);
            return false;
        } else {
            mLoadedWorlds = worldManager.worlds().keys();

            Document *document = mDocumentManager->currentDocument();
            if (document && document->type() == Document::MapDocumentType)
                if (worldManager.worldForMap(document->fileName()) == world)
                    return true;

            // Try to open the first map in the world, if the current map
            // isn't already part of this world.
            return openFile(world->firstMap());
        }
    }

    // Select existing document if this file is already open
    if (mDocumentManager->switchToDocument(fileName))
        return true;

    QString error;
    DocumentPtr document = mDocumentManager->loadDocument(fileName, fileFormat, &error);

    if (!document) {
        // HACK: Templates can't open as documents, but we can instead show
        // them in the Template Editor.
        if (mMapEditor->templatesDock()->tryOpenTemplate(fileName)) {
            mMapEditor->templatesDock()->bringToFront();
            return true;
        }

        QMessageBox::critical(this,
                              tr("Error Opening File"),
                              tr("Error opening '%1':\n%2").arg(fileName, error));
        return false;
    }

    mDocumentManager->addDocument(document);

    if (auto mapDocument = qobject_cast<MapDocument*>(document.data())) {
        mDocumentManager->checkTilesetColumns(mapDocument);
    } else if (auto tilesetDocument = qobject_cast<TilesetDocument*>(document.data())) {
        mDocumentManager->checkTilesetColumns(tilesetDocument);
        tilesetDocument->tileset()->syncExpectedColumnsAndRows();
    }

    return true;
}

void MainWindow::openFileDialog()
{
    SessionOption<QString> lastUsedOpenFilter { "file.lastUsedOpenFilter" };
    QString allFilesFilter = tr("All Files (*)");
    QString selectedFilter = lastUsedOpenFilter;
    if (selectedFilter.isEmpty())
        selectedFilter = allFilesFilter;

    FormatHelper<FileFormat> helper(FileFormat::Read, allFilesFilter);

    // Make it clear that world and project files can also be opened here (see openFile)
    auto filter = helper.filter();
    filter.append(QStringLiteral(";;"));
    filter.append(tr("World files (*.world)"));
    filter.append(QStringLiteral(";;"));
    filter.append(tr("Tiled Projects (*.tiled-project)"));

    const auto fileNames = QFileDialog::getOpenFileNames(this, tr("Open File"),
                                                         mDocumentManager->fileDialogStartLocation(),
                                                         filter,
                                                         &selectedFilter);
    if (fileNames.isEmpty())
        return;

    // When a particular filter was selected, use the associated format
    FileFormat *fileFormat = helper.formatByNameFilter(selectedFilter);

    lastUsedOpenFilter = selectedFilter;

    for (const QString &fileName : fileNames)
        openFile(fileName, fileFormat);
}

void MainWindow::openFileInProject()
{
    if (mLocatorWidget)
        return;

    const QSize size(qMax(width() / 3, qMin(Utils::dpiScaled(600), width())),
                     qMin(Utils::dpiScaled(600), height()));
    const int remainingHeight = height() - size.height();
    const QPoint localPos((width() - size.width()) / 2,
                          qMin(remainingHeight / 5, Utils::dpiScaled(60)));
    const QRect rect = QRect(mapToGlobal(localPos), size);

    mLocatorWidget = new LocatorWidget(this);
    mLocatorWidget->move(rect.topLeft());
    mLocatorWidget->setMaximumSize(rect.size());
    mLocatorWidget->show();
}

static Document *saveAsDocument(Document *document)
{
    if (auto tilesetDocument = qobject_cast<TilesetDocument*>(document))
        if (tilesetDocument->isEmbedded())
            document = tilesetDocument->mapDocuments().first();

    return document;
}

bool MainWindow::saveFile()
{
    Document *document = mDocumentManager->currentDocument();
    if (!document)
        return false;

    document = saveAsDocument(document);

    const QString currentFileName = document->fileName();

    if (currentFileName.isEmpty() || !document->writerFormat())
        return mDocumentManager->saveDocumentAs(document);
    else
        return mDocumentManager->saveDocument(document, currentFileName);
}

bool MainWindow::saveFileAs()
{
    Document *document = mDocumentManager->currentDocument();
    if (!document)
        return false;

    document = saveAsDocument(document);

    return mDocumentManager->saveDocumentAs(document);
}

static bool isEmbeddedTilesetDocument(Document *document)
{
    if (auto *tilesetDocument = qobject_cast<TilesetDocument*>(document))
        return tilesetDocument->isEmbedded();
    return false;
}

void MainWindow::saveAll()
{
    for (const auto &document : mDocumentManager->documents()) {
        if (!mDocumentManager->isDocumentModified(document.data()))
            continue;

        // Skip embedded tilesets, they will be saved when their map is checked
        if (isEmbeddedTilesetDocument((document.data())))
            continue;

        QString fileName(document->fileName());

        if (fileName.isEmpty()) {
            mDocumentManager->switchToDocument(document.data());
            if (!mDocumentManager->saveDocumentAs(document.data()))
                return;
        } else if (!mDocumentManager->saveDocument(document.data(), fileName)) {
            return;
        }
    }

    for (const World *world : WorldManager::instance().worlds()) {
        if (!mDocumentManager->isWorldModified(world->fileName))
            continue;

        QString error;
        if (!WorldManager::instance().saveWorld(world->fileName, &error)) {
            QMessageBox::critical(this, tr("Error Saving World"), error);
            return;
        }

        DocumentManager::instance()->ensureWorldDocument(world->fileName)->undoStack()->setClean();
    }
}

bool MainWindow::confirmSave(Document *document)
{
    if (!document || !mDocumentManager->isDocumentModified(document))
        return true;

    mDocumentManager->switchToDocument(document);

    int ret = QMessageBox::warning(
            this, tr("Unsaved Changes"),
            tr("There are unsaved changes. Do you want to save now?"),
            QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);

    switch (ret) {
    case QMessageBox::Save:    return saveFile();
    case QMessageBox::Discard: return true;
    case QMessageBox::Cancel:
    default:
        mDocumentManager->abortMultiDocumentClose();
        return false;
    }
}

bool MainWindow::confirmAllSave()
{
    for (const auto &document : mDocumentManager->documents()) {
        if (isEmbeddedTilesetDocument((document.data())))
            continue;
        if (!confirmSave(document.data()))
            return false;
    }

    for (const World *world : WorldManager::instance().worlds())
        if (!confirmSaveWorld(world->fileName))
            return false;

    return true;
}

bool MainWindow::confirmSaveWorld(const QString &fileName)
{
    if (!mDocumentManager->isWorldModified(fileName))
        return true;

    int ret = QMessageBox::warning(
            this, tr("Unsaved Changes to World"),
            tr("There are unsaved changes to world \"%1\". Do you want to save the world now?").arg(fileName),
            QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);

    switch (ret) {
    case QMessageBox::Save:
        if (!WorldManager::instance().saveWorld(fileName))
            return false;

        DocumentManager::instance()->ensureWorldDocument(fileName)->undoStack()->setClean();
        return true;
    case QMessageBox::Discard:
        return true;
    case QMessageBox::Cancel:
    default:
        return false;
    }
}

void MainWindow::export_()
{
    if (!exportDocument(mDocument)) {
        // fall back when previous export could not be repeated
        exportAs();
    }
}

/**
 * Exports the given document to the previously used export file name and the
 * previously used export format.
 *
 * @return `false` when no previous file name and export format could be de
 *          determined. Otherwise, `true` is returned, even if an error
 *          happened during export.
 */
bool MainWindow::exportDocument(Document *document)
{
    const QString exportFileName = document->lastExportFileName();
    if (exportFileName.isEmpty())
        return false;

    if (auto mapDocument = qobject_cast<MapDocument*>(document)) {
        if (MapFormat *exportFormat = mapDocument->exportFormat()) {
            std::unique_ptr<Map> exportMap;
            ExportHelper exportHelper;
            const Map *map = exportHelper.prepareExportMap(mapDocument->map(), exportMap);

            if (exportFormat->write(map, exportFileName, exportHelper.formatOptions())) {
                statusBar()->showMessage(tr("Exported to %1").arg(exportFileName), 3000);
                return true;
            }

            QMessageBox::critical(this, tr("Error Exporting Map"),
                                  exportFormat->errorString());
            return true;
        }
    } else if (auto tilesetDocument = qobject_cast<TilesetDocument*>(document)) {
        if (TilesetFormat *exportFormat = tilesetDocument->exportFormat()) {
            ExportHelper exportHelper;
            const SharedTileset tileset = exportHelper.prepareExportTileset(tilesetDocument->tileset());

            if (exportFormat->write(*tileset, exportFileName, exportHelper.formatOptions())) {
                statusBar()->showMessage(tr("Exported to %1").arg(exportFileName), 3000);
                return true;
            }

            QMessageBox::critical(this, tr("Error Exporting Tileset"),
                                  exportFormat->errorString());
            return true;
        }
    }

    return false;
}

void MainWindow::exportAs()
{
    if (auto mapDocument = qobject_cast<MapDocument*>(mDocument))
        exportMapAs(mapDocument);
    else if (auto tilesetDocument = qobject_cast<TilesetDocument*>(mDocument))
        exportTilesetAs(tilesetDocument);
}

void MainWindow::exportAsImage()
{
    auto mapDocument = qobject_cast<MapDocument*>(mDocument);
    if (!mapDocument)
        return;

    MapView *mapView = mDocumentManager->currentMapView();
    ExportAsImageDialog dialog(mapDocument,
                               mapDocument->fileName(),
                               mapView->zoomable()->scale(),
                               this);
    dialog.exec();
}

void MainWindow::reload()
{
    // todo: asking to save is not appropriate here
    if (confirmSave(mDocumentManager->currentDocument()))
        mDocumentManager->reloadCurrentDocument();
}

void MainWindow::closeFile()
{
    if (confirmSave(mDocumentManager->currentDocument()))
        mDocumentManager->closeCurrentDocument();
}

bool MainWindow::closeAllFiles()
{
    if (confirmAllSave()) {
        mDocumentManager->closeAllDocuments();
        return true;
    }
    return false;
}

void MainWindow::openProject()
{
    const QString dir = Preferences::instance()->recentProjectPath();
    const QString projectFilesFilter = tr("Tiled Projects (*.tiled-project)");
    const QString fileName = QFileDialog::getOpenFileName(window(),
                                                          tr("Open Project"),
                                                          dir,
                                                          projectFilesFilter,
                                                          nullptr);
    if (!fileName.isEmpty())
        openProjectFile(fileName);
}

bool MainWindow::openProjectFile(const QString &fileName)
{
    Project project;

    if (!project.load(fileName)) {
        QMessageBox::critical(window(),
                              tr("Error Opening Project"),
                              tr("An error occurred while opening the project."));
        return false;
    }

    return switchProject(std::move(project));
}

void MainWindow::saveProjectAs()
{
    auto prefs = Preferences::instance();

    Project &project = ProjectManager::instance()->project();
    QString fileName = project.fileName();
    if (fileName.isEmpty()) {
        if (!project.folders().isEmpty()) {
            // Try to suggest a name for the project based on folder location
            const auto path = fileName = QFileInfo(project.folders().first()).path();
            fileName = path
                    + QLatin1Char('/')
                    + QFileInfo(path).fileName()
                    + QLatin1String(".tiled-project");
        } else {
            // Start in a familiar location otherwise
            fileName = prefs->recentProjectPath();
            fileName.append(QLatin1Char('/'));
            fileName.append(tr("untitled") + QLatin1String(".tiled-project"));
        }
    }

    const QString projectFilesFilter = tr("Tiled Projects (*.tiled-project)");
    fileName = QFileDialog::getSaveFileName(window(),
                                            tr("Save Project As"),
                                            fileName,
                                            projectFilesFilter,
                                            nullptr);
    if (fileName.isEmpty())
        return;

    if (!fileName.endsWith(QLatin1String(".tiled-project"))) {
        while (fileName.endsWith(QLatin1Char('.')))
            fileName.chop(1);

        fileName.append(QStringLiteral(".tiled-project"));
    }

    if (!project.save(fileName)) {
        QMessageBox::critical(window(),
                              tr("Error Saving Project"),
                              tr("An error occurred while saving the project."));
    }

    Session &session = Session::current();
    session.setFileName(Session::defaultFileNameForProject(fileName));
    session.setProject(fileName);

    // Automatically enable extensions for new projects
    ScriptManager::instance().enableProjectExtensions();

    prefs->addRecentProject(fileName);
    prefs->setLastSession(session.fileName());

    updateWindowTitle();
    updateActions();
}

void MainWindow::closeProject()
{
    const Project &project = ProjectManager::instance()->project();
    if (project.fileName().isEmpty())
        return;

    switchProject(Project{});
}

bool MainWindow::switchProject(Project project)
{
    auto prefs = Preferences::instance();
    emit prefs->aboutToSwitchSession();

    if (!closeAllFiles())
        return false;

    WorldManager::instance().unloadAllWorlds();

    auto &session = Session::switchCurrent(Session::defaultFileNameForProject(project.fileName()));

    if (!project.fileName().isEmpty()) {
        session.setProject(project.fileName());
        prefs->addRecentProject(project.fileName());
    }

    ProjectManager::instance()->setProject(std::move(project));

    restoreSession();
    updateWindowTitle();
    updateActions();

    return true;
}

void MainWindow::restoreSession()
{
    const auto &session = Session::current();

    // Copy values because the session will get changed while restoring it
    const auto openFiles = session.openFiles;
    const auto activeFile = session.activeFile;

    for (const QString &file : openFiles)
        openFile(file);
    mDocumentManager->switchToDocument(activeFile);

    WorldManager::instance().loadWorlds(mLoadedWorlds);

    mProjectDock->setExpandedPaths(session.expandedProjectPaths);

    if (ScriptManager::instance().projectExtensionsSuppressed())
        openProjectExtensionsPopup();
}

void MainWindow::projectProperties()
{
    Project &project = ProjectManager::instance()->project();

    if (ProjectPropertiesDialog(project, this).exec() == QDialog::Accepted) {
        project.save();
        Preferences::instance()->setObjectTypesFile(project.mObjectTypesFile);

        ScriptManager::instance().refreshExtensionsPaths();
        mAutomappingManager->refreshRulesFile();
    }
}

void MainWindow::cut()
{
    if (auto editor = mDocumentManager->currentEditor())
        editor->performStandardAction(Editor::CutAction);
}

void MainWindow::copy()
{
    if (auto editor = mDocumentManager->currentEditor())
        editor->performStandardAction(Editor::CopyAction);
}

void MainWindow::paste()
{
    if (auto editor = mDocumentManager->currentEditor())
        editor->performStandardAction(Editor::PasteAction);
}

void MainWindow::pasteInPlace()
{
    if (auto editor = mDocumentManager->currentEditor())
        editor->performStandardAction(Editor::PasteInPlaceAction);
}

void MainWindow::delete_()
{
    if (auto editor = mDocumentManager->currentEditor())
        editor->performStandardAction(Editor::DeleteAction);
}

void MainWindow::openPreferences()
{
    if (!mPreferencesDialog) {
        mPreferencesDialog = new PreferencesDialog(this);
        mPreferencesDialog->setAttribute(Qt::WA_DeleteOnClose);
    }

    mPreferencesDialog->show();
    mPreferencesDialog->activateWindow();
    mPreferencesDialog->raise();
}

void MainWindow::openCrashReporterPopup()
{
#ifdef TILED_SENTRY
    if (mPopupWidget)
        return;

    auto label = new QLabel;
    label->setTextFormat(Qt::RichText);
    label->setText(tr("<html>Enable anonymous crash reporting? <a href=\"https://www.mapeditor.org/crash-reporting\">more information</a></html>"));
    label->setOpenExternalLinks(true);

    auto yesButton = new QPushButton(tr("&Yes"));
    auto noButton = new QPushButton(tr("&No"));

    auto layout = new QHBoxLayout;
    layout->addWidget(label);
    layout->addSpacing(Utils::dpiScaled(10));
    layout->addWidget(noButton);
    layout->addWidget(yesButton);
    const auto margin = Utils::dpiScaled(5);
    layout->setContentsMargins(margin * 2, margin, margin, margin);

    auto popup = new PopupWidget(this);
    popup->setLayout(layout);

    connect(yesButton, &QPushButton::clicked, [] {
        Sentry::instance()->setUserConsent(Sentry::ConsentGiven);
    });
    connect(noButton, &QPushButton::clicked, [] {
        Sentry::instance()->setUserConsent(Sentry::ConsentRevoked);
    });
    connect(Sentry::instance(), &Sentry::userConsentChanged, popup, [popup] (Sentry::UserConsent consent) {
        if (consent != Sentry::ConsentUnknown)
            popup->deleteLater();
    });

    showPopup(popup);
#endif
}

void MainWindow::openProjectExtensionsPopup()
{
    if (mPopupWidget)
        mPopupWidget->close();

    auto label = new QLabel;
    label->setTextFormat(Qt::RichText);
    label->setText(tr("The current project contains <a href=\"https://doc.mapeditor.org/en/stable/reference/scripting/\">scripted extensions</a>.<br><i>Make sure you trust those extensions before enabling them!</i>"));
    label->setOpenExternalLinks(true);

    auto enableButton = new QPushButton(tr("&Enable Extensions"));
    auto closeButton = new QPushButton(tr("&Close"));

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(label);
    layout->addSpacing(Utils::dpiScaled(10));
    layout->addWidget(enableButton);
    layout->addWidget(closeButton);

    auto popup = new PopupWidget(this);
    popup->setLayout(layout);
    popup->setTint(Qt::yellow);

    connect(enableButton, &QPushButton::clicked, [popup] {
        ScriptManager::instance().enableProjectExtensions();
        popup->close();
    });
    connect(closeButton, &QPushButton::clicked, [popup] {
        popup->close();
    });
    connect(&ScriptManager::instance(), &ScriptManager::projectExtensionsSuppressedChanged,
            popup, [popup] (bool suppressed) { if (!suppressed) popup->close(); });

    showPopup(popup);
}

void MainWindow::showPopup(QWidget *widget)
{
    mPopupWidgetShowProgress = 1.0;
    mPopupWidget = widget;

    widget->setVisible(true);
    updatePopupGeometry(size());

    // Show the popup using a smooth animation
    QVariantAnimation *animation = new QVariantAnimation(this);
    animation->setDuration(1000);
    animation->setStartValue(1.0);
    animation->setEndValue(0.0);
    animation->setEasingCurve(QEasingCurve::OutCubic);
    animation->start(QAbstractAnimation::DeleteWhenStopped);
    connect(animation, &QVariantAnimation::valueChanged, this, [this] (const QVariant &value) {
        mPopupWidgetShowProgress = value.toDouble();
        updatePopupGeometry(size());
    });
}

void MainWindow::updatePopupGeometry(QSize size)
{
    if (!mPopupWidget)
        return;
    const auto popupSizeHint = mPopupWidget->sizeHint();
    const auto popupWidth = qMin(popupSizeHint.width(), size.width());
    mPopupWidget->setGeometry(size.width() - popupWidth,
                              0 - popupSizeHint.height() * mPopupWidgetShowProgress,
                              popupWidth,
                              popupSizeHint.height());
}

void MainWindow::labelVisibilityActionTriggered(QAction *action)
{
    Preferences::ObjectLabelVisiblity visibility = Preferences::NoObjectLabels;

    if (action == mUi->actionLabelsForSelectedObjects)
        visibility = Preferences::SelectedObjectLabels;
    else if (action == mUi->actionLabelsForAllObjects)
        visibility = Preferences::AllObjectLabels;

    Preferences::instance()->setObjectLabelVisibility(visibility);
}

void MainWindow::zoomIn()
{
    if (mZoomable)
        mZoomable->zoomIn();
}

void MainWindow::zoomOut()
{
    if (mZoomable)
        mZoomable->zoomOut();
}

void MainWindow::zoomNormal()
{
    if (mZoomable)
        mZoomable->resetZoom();
}

void MainWindow::fitInView()
{
    if (MapView *mapView = mDocumentManager->currentMapView())
        mapView->fitMapInView();
}

void MainWindow::setFullScreen(bool fullScreen)
{
    if (isFullScreen() == fullScreen)
        return;

    if (fullScreen)
        setWindowState(windowState() | Qt::WindowFullScreen);
    else
        setWindowState(windowState() & ~Qt::WindowFullScreen);
}

void MainWindow::toggleClearView(bool clearView)
{
    MapEditor *mapEditor = nullptr;

    if (mDocument && mDocument->type() == Document::MapDocumentType) {
        mapEditor = static_cast<MapEditor*>(mDocumentManager->editor(Document::MapDocumentType));
        MapView *mapView = mapEditor->currentMapView();
        mapView->setResizeAnchor(QGraphicsView::AnchorViewCenter);
    }

    if (clearView) {
        mMainWindowStates.insert(this, saveState());

        const QList<QDockWidget*> docks = allDockWidgets();
        const QList<QToolBar*> toolBars = allToolBars();

        const auto editors = mDocumentManager->editors();
        for (Editor *editor : editors) {
            if (auto editorWindow = qobject_cast<QMainWindow*>(editor->editorWidget()))
                mMainWindowStates.insert(editorWindow, editorWindow->saveState());
        }

        for (auto dock : docks)
            dock->hide();
        for (auto toolBar : toolBars)
            toolBar->hide();

    } else {
        QMapIterator<QMainWindow*, QByteArray> it(mMainWindowStates);
        while (it.hasNext()) {
            it.next();
            it.key()->restoreState(it.value());
        }
        mMainWindowStates.clear();
    }

    layout()->activate();

    if (mapEditor) {
        mapEditor->editorWidget()->layout()->activate();

        MapView *mapView = mapEditor->currentMapView();
        mapView->setResizeAnchor(QGraphicsView::NoAnchor);
    }
}

void MainWindow::setLayoutLocked(bool locked)
{
    const QList<QDockWidget*> docks = allDockWidgets();
    const QList<QToolBar*> toolBars = allToolBars();

    QDockWidget::DockWidgetFeatures features = QDockWidget::DockWidgetClosable;
    if (!locked)
        features |= QDockWidget::DockWidgetMovable | QDockWidget::DockWidgetFloatable;

    for (auto dock : docks)
        dock->setFeatures(features);

    for (auto toolBar : toolBars)
        toolBar->setMovable(!locked);
}

bool MainWindow::newTileset(const QString &path)
{
    Session &session = Session::current();

    const QString startLocation = path.isEmpty()
            ? session.lastPath(Session::ImageFile)
            : path;

    NewTilesetDialog newTileset(this);
    newTileset.setImagePath(startLocation);

    SharedTileset tileset = newTileset.createTileset();
    if (!tileset)
        return false;

    if (tileset->imageSource().isLocalFile())
        session.setLastPath(Session::ImageFile, QFileInfo(tileset->imageSource().toLocalFile()).absolutePath());

    auto mapDocument = qobject_cast<MapDocument*>(mDocument);

    if (mapDocument && newTileset.isEmbedded()) {
        // Add embedded tileset to the map
        mapDocument->undoStack()->push(new AddTileset(mapDocument, tileset));
    } else {
        // Save new external tileset and open it
        auto tilesetDocument = TilesetDocumentPtr::create(tileset);
        emit mDocumentManager->documentCreated(tilesetDocument.data());
        if (!mDocumentManager->saveDocumentAs(tilesetDocument.data()))
            return false;
        mDocumentManager->addDocument(tilesetDocument);
    }
    return true;
}

void MainWindow::reloadTilesetImages()
{
    TilesetManager *tilesetManager = TilesetManager::instance();

    if (auto mapDocument = qobject_cast<MapDocument*>(mDocument)) {
        Map *map = mapDocument->map();
        const auto tilesets = map->tilesets();
        for (const SharedTileset &tileset : tilesets)
            tilesetManager->reloadImages(tileset.data());
    } else if (auto tilesetDocument = qobject_cast<TilesetDocument*>(mDocument)) {
        tilesetManager->reloadImages(tilesetDocument->tileset().data());
    }
}

void MainWindow::addExternalTileset()
{
    auto mapDocument = qobject_cast<MapDocument*>(mDocument);
    if (!mapDocument)
        return;

    SessionOption<QString> lastUsedTilesetFilter { "tileset.lastUsedFilter" };
    QString filter = tr("All Files (*)");
    QString selectedFilter = lastUsedTilesetFilter;
    if (selectedFilter.isEmpty())
        selectedFilter = TsxTilesetFormat().nameFilter();

    FormatHelper<TilesetFormat> helper(FileFormat::Read, filter);

    Session &session = Session::current();
    QString start = session.lastPath(Session::ExternalTileset);

    const QStringList fileNames =
            QFileDialog::getOpenFileNames(this, tr("Add External Tileset(s)"),
                                          start,
                                          helper.filter(),
                                          &selectedFilter);

    if (fileNames.isEmpty())
        return;

    session.setLastPath(Session::ExternalTileset,
                        QFileInfo(fileNames.last()).path());

    lastUsedTilesetFilter = selectedFilter;

    auto mapEditor = static_cast<MapEditor*>(mDocumentManager->currentEditor());
    mapEditor->addExternalTilesets(fileNames);
}

void MainWindow::resizeMap()
{
    auto mapDocument = qobject_cast<MapDocument*>(mDocument);
    if (!mapDocument)
        return;

    Map *map = mapDocument->map();

    QSize mapSize(map->size());
    QPoint mapStart(0, 0);

    if (map->infinite()) {
        QRect mapBounds;

        LayerIterator iterator(map);
        while (Layer *layer = iterator.next()) {
            if (TileLayer *tileLayer = dynamic_cast<TileLayer*>(layer))
                mapBounds = mapBounds.united(tileLayer->bounds());
        }

        if (!mapBounds.isEmpty()) {
            mapSize = mapBounds.size();
            mapStart = mapBounds.topLeft();
        }
    }

    ResizeDialog resizeDialog(this);
    resizeDialog.setOldSize(mapSize);

    // TODO: Look into fixing up the preview for maps that do not use square
    // tiles, and possibly also staggered maps.
    if (map->orientation() == Map::Orthogonal && map->tileWidth() == map->tileHeight()) {
        resizeDialog.setMiniMapRenderer([mapDocument](QSize size){
            QImage image(size, QImage::Format_ARGB32_Premultiplied);
            MiniMapRenderer(mapDocument->map()).renderToImage(image, MiniMapRenderer::DrawMapObjects
                                                              | MiniMapRenderer::DrawImageLayers
                                                              | MiniMapRenderer::DrawTileLayers
                                                              | MiniMapRenderer::IgnoreInvisibleLayer
                                                              | MiniMapRenderer::SmoothPixmapTransform);
            return image;
        });
    }

    if (resizeDialog.exec()) {
        const QSize newSize = resizeDialog.newSize();
        const QPoint offset = resizeDialog.offset() - mapStart;
        if (newSize != mapSize || !offset.isNull())
            mapDocument->resizeMap(newSize, offset, resizeDialog.removeObjects());
    }
}

void MainWindow::offsetMap()
{
    auto mapDocument = qobject_cast<MapDocument*>(mDocument);
    if (!mapDocument)
        return;

    OffsetMapDialog offsetDialog(mapDocument, this);
    if (offsetDialog.exec()) {
        const auto layers = offsetDialog.affectedLayers();
        if (layers.empty())
            return;

        mapDocument->offsetMap(layers,
                               offsetDialog.offset(),
                               offsetDialog.affectedBoundingRect(),
                               offsetDialog.wrapX(),
                               offsetDialog.wrapY());
    }
}

void MainWindow::editMapProperties()
{
    auto mapDocument = qobject_cast<MapDocument*>(mDocument);
    if (!mapDocument)
        return;

    mapDocument->setCurrentObject(mapDocument->map());
    emit mapDocument->editCurrentObject();
}

void MainWindow::editTilesetProperties()
{
    auto tilesetDocument = qobject_cast<TilesetDocument*>(mDocument);
    if (!tilesetDocument)
        return;

    tilesetDocument->setCurrentObject(tilesetDocument->tileset().data());
    emit tilesetDocument->editCurrentObject();
}

void MainWindow::autoMappingError(bool automatic)
{
    QString error = mAutomappingManager->errorString();
    if (!error.isEmpty()) {
        if (automatic) {
            statusBar()->showMessage(error, 3000);
        } else {
            QMessageBox::critical(this, tr("Automatic Mapping Error"), error);
        }
    }
}

void MainWindow::autoMappingWarning(bool automatic)
{
    QString warning = mAutomappingManager->warningString();
    if (!warning.isEmpty()) {
        if (automatic) {
            statusBar()->showMessage(warning, 3000);
        } else {
            QMessageBox::warning(this, tr("Automatic Mapping Warning"), warning);
        }
    }
}

void MainWindow::onObjectTypesEditorClosed()
{
    mShowObjectTypesEditor->setChecked(false);
}

void MainWindow::onPropertyTypesEditorClosed()
{
    mShowPropertyTypesEditor->setChecked(false);
}

void MainWindow::ensureHasBorderInFullScreen()
{
#ifdef Q_OS_WIN
    // Workaround issue #1576
    static bool hasBorderInFullScreen = false;

    if (hasBorderInFullScreen)
        return;

    if (!Preferences::instance()->useOpenGL())
        return;

    QWindow *window = windowHandle();
    if (!window)
        return;

    bool wasFullScreen = isFullScreen();
    setFullScreen(false);
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QWindowsWindowFunctions::setHasBorderInFullScreen(window, true);
#else
    using QWindowsWindow = QNativeInterface::Private::QWindowsWindow;
    if (auto windowsWindow = window->nativeInterface<QWindowsWindow>())
        windowsWindow->setHasBorderInFullScreen(true);
#endif
    setFullScreen(wasFullScreen);

    hasBorderInFullScreen = true;
#endif
}

void MainWindow::openRecentFile()
{
    QAction *action = qobject_cast<QAction *>(sender());
    if (action)
        openFile(action->data().toString());
}

void MainWindow::reopenClosedFile()
{
    const auto &recentFiles = Session::current().recentFiles;
    for (const QString &file : recentFiles) {
        if (mDocumentManager->findDocument(file) == -1) {
            openFile(file);
            break;
        }
    }
}

void MainWindow::openRecentProject()
{
    QAction *action = qobject_cast<QAction *>(sender());
    if (action)
        openProjectFile(action->data().toString());
}

/**
 * Updates the recent files menu.
 */
void MainWindow::updateRecentFilesMenu()
{
    const auto &files = Session::current().recentFiles;
    const int numRecentFiles = qMin<int>(files.size(), Preferences::MaxRecentFiles);

    for (int i = 0; i < numRecentFiles; ++i) {
        const auto &file = files[i];
        const QFileInfo fileInfo(file);
        mRecentFiles[i]->setText(fileInfo.fileName());
        mRecentFiles[i]->setData(file);
        mRecentFiles[i]->setVisible(true);
        mRecentFiles[i]->setToolTip(fileInfo.filePath());
    }
    for (int j = numRecentFiles; j < Preferences::MaxRecentFiles; ++j) {
        mRecentFiles[j]->setVisible(false);
    }
    mUi->menuRecentFiles->setEnabled(numRecentFiles > 0);
}

bool MainWindow::addRecentProjectsActions(QMenu *menu) const
{
    const QStringList files = Preferences::instance()->recentProjects();

    for (const QString &file : files) {
        const QFileInfo fileInfo(file);
        auto action = menu->addAction(fileInfo.fileName(), this, &MainWindow::openRecentProject);
        action->setData(file);
        action->setToolTip(fileInfo.filePath());
    }

    return !files.isEmpty();
}

void MainWindow::updateRecentProjectsMenu()
{
    auto menu = mUi->menuRecentProjects;
    menu->clear();

    bool enabled = addRecentProjectsActions(menu);
    if (enabled) {
        menu->addSeparator();
        menu->addAction(mUi->actionClearRecentProjects);
    }
    menu->setEnabled(enabled);
}

void MainWindow::resetToDefaultLayout()
{
    // Make sure we're not in Clear View mode
    mUi->actionClearView->setChecked(false);

    // Reset the docks
    mProjectDock->setFloating(false);
    mConsoleDock->setFloating(false);
    mIssuesDock->setFloating(false);
    addDockWidget(Qt::LeftDockWidgetArea, mProjectDock);
    addDockWidget(Qt::BottomDockWidgetArea, mConsoleDock);
    addDockWidget(Qt::BottomDockWidgetArea, mIssuesDock);
    mProjectDock->setVisible(true);
    mConsoleDock->setVisible(false);
    mIssuesDock->setVisible(false);
    tabifyDockWidget(mConsoleDock, mIssuesDock);

    // Reset the layout of the current editor
    if (auto editor = mDocumentManager->currentEditor())
        editor->resetLayout();
}

void MainWindow::updateViewsAndToolbarsMenu()
{
    mViewsAndToolbarsMenu->clear();

    mViewsAndToolbarsMenu->addAction(mProjectDock->toggleViewAction());
    mViewsAndToolbarsMenu->addAction(mConsoleDock->toggleViewAction());
    mViewsAndToolbarsMenu->addAction(mIssuesDock->toggleViewAction());

    if (Editor *editor = mDocumentManager->currentEditor()) {
        mViewsAndToolbarsMenu->addSeparator();
        const auto dockWidgets = editor->dockWidgets();
        for (auto dockWidget : dockWidgets)
            mViewsAndToolbarsMenu->addAction(dockWidget->toggleViewAction());

        mViewsAndToolbarsMenu->addSeparator();
        const auto toolBars = editor->toolBars();
        for (auto toolBar : toolBars)
            mViewsAndToolbarsMenu->addAction(toolBar->toggleViewAction());
    }

    mViewsAndToolbarsMenu->addSeparator();
    mViewsAndToolbarsMenu->addAction(mLockLayout);
    mViewsAndToolbarsMenu->addAction(mResetToDefaultLayout);
}

void MainWindow::updateActions()
{
    const auto editor = mDocumentManager->currentEditor();
    const auto document = mDocumentManager->currentDocument();
    const auto mapDocument = qobject_cast<const MapDocument*>(document);
    const auto tilesetDocument = qobject_cast<const TilesetDocument*>(document);
    const auto &project = ProjectManager::instance()->project();
    const bool projectHasFolders = !project.folders().isEmpty();

    Editor::StandardActions standardActions;
    if (editor)
        standardActions = editor->enabledStandardActions();

    mUi->actionOpenFileInProject->setEnabled(projectHasFolders);
    mUi->actionSave->setEnabled(document);
    mUi->actionSaveAs->setEnabled(document);
    mUi->actionSaveAll->setEnabled(document);

    mUi->actionExportAsImage->setEnabled(mapDocument);
    mUi->actionExport->setEnabled(mapDocument || tilesetDocument);
    mUi->actionExportAs->setEnabled(mapDocument || tilesetDocument);
    mUi->actionReload->setEnabled(mapDocument || (tilesetDocument && tilesetDocument->canReload()));
    mUi->actionClose->setEnabled(document);
    mUi->actionCloseAll->setEnabled(document);

    mUi->actionCut->setEnabled(standardActions & Editor::CutAction);
    mUi->actionCopy->setEnabled(standardActions & Editor::CopyAction);
    mUi->actionPaste->setEnabled(standardActions & Editor::PasteAction);
    mUi->actionPasteInPlace->setEnabled(standardActions & Editor::PasteInPlaceAction);
    mUi->actionDelete->setEnabled(standardActions & Editor::DeleteAction);

    mUi->menuWorld->menuAction()->setVisible(mapDocument);
    mUi->menuMap->menuAction()->setVisible(mapDocument);
    mUi->actionAddExternalTileset->setEnabled(mapDocument);
    mUi->actionResizeMap->setEnabled(mapDocument);
    mUi->actionOffsetMap->setEnabled(mapDocument);
    mUi->actionMapProperties->setEnabled(mapDocument);
    mUi->actionAutoMap->setEnabled(mapDocument);

    mUi->menuTileset->menuAction()->setVisible(tilesetDocument);
    mUi->actionTilesetProperties->setEnabled(tilesetDocument);

    mLayerMenu->menuAction()->setVisible(mapDocument);

    const bool hasProject = !project.fileName().isEmpty();
    mUi->actionCloseProject->setEnabled(hasProject);
}

void MainWindow::updateZoomable()
{
    Zoomable *zoomable = nullptr;
    if (auto editor = mDocumentManager->currentEditor())
        zoomable = editor->zoomable();

    if (zoomable != mZoomable) {
        if (mZoomable)
            mZoomable->disconnect(this);

        mZoomable = zoomable;

        if (zoomable) {
            connect(zoomable, &Zoomable::scaleChanged, this, &MainWindow::updateZoomActions);
            connect(zoomable, &Zoomable::destroyed, this, [=] {
                if (mZoomable == zoomable)
                    mZoomable = nullptr;
            });
        }

        updateZoomActions();
    }
}

void MainWindow::updateZoomActions()
{
    const qreal scale = mZoomable ? mZoomable->scale() : 1;

    mUi->actionZoomIn->setEnabled(mZoomable && mZoomable->canZoomIn());
    mUi->actionZoomOut->setEnabled(mZoomable && mZoomable->canZoomOut());
    mUi->actionZoomNormal->setEnabled(scale != 1);
    mUi->actionFitInView->setEnabled(mDocument && mDocument->type() == Document::MapDocumentType);
}

void MainWindow::openDocumentation()
{
#ifdef TILED_SNAPSHOT
    QDesktopServices::openUrl(QUrl(QLatin1String("https://docs.mapeditor.org/en/latest/")));
#else
    QDesktopServices::openUrl(QUrl(QLatin1String("https://docs.mapeditor.org")));
#endif
}

void MainWindow::openForum()
{
    QDesktopServices::openUrl(QUrl(QLatin1String("https://discourse.mapeditor.org")));
}

void MainWindow::writeSettings()
{
#ifdef Q_OS_MAC
    // See QTBUG-45241
    if (isFullScreen())
        setWindowState(windowState() & ~Qt::WindowFullScreen);
#endif

    preferences::mainWindowGeometry = saveGeometry();
    preferences::mainWindowState = saveState();
    preferences::mainWindowLocked = mLockLayout->isChecked();

    mDocumentManager->saveState();
}

void MainWindow::readSettings()
{
    QByteArray geom = preferences::mainWindowGeometry;
    if (!geom.isEmpty())
        restoreGeometry(geom);
    else
        resize(Utils::dpiScaled(QSize(1200, 700)));
    restoreState(preferences::mainWindowState);
    updateRecentFilesMenu();
    updateRecentProjectsMenu();

    mDocumentManager->restoreState();

    mLockLayout->setChecked(preferences::mainWindowLocked);
}

void MainWindow::updateWindowTitle()
{
    QString projectName = ProjectManager::instance()->project().fileName();
    if (!projectName.isEmpty()) {
        projectName = QFileInfo(projectName).completeBaseName();
        projectName = QStringLiteral(" (%1)").arg(projectName);
    }

    if (Document *document = mDocumentManager->currentDocument()) {
        setWindowTitle(tr("[*]%1%2").arg(document->displayName(), projectName));
        setWindowFilePath(document->fileName());
        setWindowModified(document->isModified());
    } else {
        setWindowTitle(projectName);
        setWindowFilePath(QString());
        setWindowModified(false);
    }
}

void MainWindow::showDonationPopup()
{
    if (mPopupWidget)
        return;

    showPopup(new DonationPopup(this));
}

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

void MainWindow::retranslateUi()
{
    updateWindowTitle();

    mLayerMenu->setTitle(tr("&Layer"));
    mNewLayerMenu->setTitle(tr("&New"));
    mGroupLayerMenu->setTitle(tr("&Group"));
    mViewsAndToolbarsAction->setText(tr("Views and Toolbars"));
    mResetToDefaultLayout->setText(tr("Reset to Default Layout"));
    mLockLayout->setText(tr("Lock Layout"));
    mShowObjectTypesEditor->setText(tr("Object Types Editor"));
    mShowPropertyTypesEditor->setText(tr("Property Types Editor"));
    mActionHandler->retranslateUi();
    CommandManager::instance()->retranslateUi();
}

void MainWindow::exportMapAs(MapDocument *mapDocument)
{
    SessionOption<QString> lastUsedExportFilter { "map.lastUsedExportFilter" };
    QString fileName = mapDocument->fileName();
    QString selectedFilter = lastUsedExportFilter;
    auto exportDetails = chooseExportDetails<MapFormat>(fileName,
                                                        mapDocument->lastExportFileName(),
                                                        selectedFilter,
                                                        this);
    if (!exportDetails.isValid())
        return;

    std::unique_ptr<Map> exportMap;
    ExportHelper exportHelper;
    const Map *map = exportHelper.prepareExportMap(mapDocument->map(), exportMap);

    // Check if writer will overwrite existing files here because some writers
    // could save to multiple files at the same time. For example CSV saves
    // each layer into a separate file.
    const QStringList outputFiles = exportDetails.mFormat->outputFiles(map, exportDetails.mFileName);

    // Check if any additional output files already exist
    QStringList existingFiles;

    for (const QString &outputFile : outputFiles)
        if (outputFile != exportDetails.mFileName && QFile::exists(outputFile))
            existingFiles.append(outputFile);

    // If overwrite happens, warn the user and get confirmation before exporting
    if (!existingFiles.isEmpty()) {
        QString message = tr("Some export files already exist:") + QLatin1String("\n\n");
        message += existingFiles.join(QLatin1Char('\n'));
        message += QLatin1String("\n\n") + tr("Do you want to replace them?");

        const QMessageBox::StandardButton reply = QMessageBox::warning(
                                                      this,
                                                      tr("Overwrite Files"),
                                                      message,
                                                      QMessageBox::Yes | QMessageBox::No,
                                                      QMessageBox::No);

        if (reply != QMessageBox::Yes)
            return;
    }

    Session &session = Session::current();

    session.setLastPath(Session::ExportedFile, QFileInfo(exportDetails.mFileName).path());
    lastUsedExportFilter = selectedFilter;

    auto exportResult = exportDetails.mFormat->write(map,
                                                     exportDetails.mFileName,
                                                     exportHelper.formatOptions());
    if (!exportResult) {
        QMessageBox::critical(this, tr("Error Exporting Map!"),
                              exportDetails.mFormat->errorString());
    } else {
        // Remember export parameters, so subsequent exports can be done faster
        mapDocument->setLastExportFileName(exportDetails.mFileName);
        mapDocument->setExportFormat(exportDetails.mFormat);
    }
}

void MainWindow::exportTilesetAs(TilesetDocument *tilesetDocument)
{
    QString fileName = tilesetDocument->fileName();
    if (fileName.isEmpty()) {
        fileName = Session::current().lastPath(Session::ExportedFile);
        fileName += QLatin1Char('/');
        fileName = tilesetDocument->tileset()->name();
    }

    SessionOption<QString> lastUsedTilesetExportFilter { "lastUsedTilesetExportFilter" };
    QString selectedFilter = lastUsedTilesetExportFilter;
    auto exportDetails = chooseExportDetails<TilesetFormat>(fileName,
                                                            tilesetDocument->lastExportFileName(),
                                                            selectedFilter,
                                                            this);
    if (!exportDetails.isValid())
        return;

    Session &session = Session::current();

    session.setLastPath(Session::ExportedFile, QFileInfo(exportDetails.mFileName).path());
    lastUsedTilesetExportFilter = selectedFilter;

    ExportHelper exportHelper;
    SharedTileset exportTileset = exportHelper.prepareExportTileset(tilesetDocument->tileset());

    auto exportResult = exportDetails.mFormat->write(*exportTileset,
                                                     exportDetails.mFileName,
                                                     exportHelper.formatOptions());
    if (!exportResult) {
        QMessageBox::critical(this, tr("Error Exporting Map!"),
                              exportDetails.mFormat->errorString());
    } else {
        // Remember export parameters, so subsequent exports can be done faster
        tilesetDocument->setLastExportFileName(exportDetails.mFileName);
        tilesetDocument->setExportFormat(exportDetails.mFormat);
    }
}

void MainWindow::documentChanged(Document *document)
{
    if (mDocument)
        mDocument->disconnect(this);

    mDocument = document;

    if (document) {
        connect(document, &Document::fileNameChanged,
                this, &MainWindow::updateWindowTitle);
        connect(document, &Document::modifiedChanged,
                this, &MainWindow::updateWindowTitle);

        mProjectDock->selectFile(document->fileName());
    }

    MapDocument *mapDocument = qobject_cast<MapDocument*>(document);

    if (mapDocument) {
        connect(mapDocument, &MapDocument::currentLayerChanged,
                this, &MainWindow::updateActions);
        connect(mapDocument, &MapDocument::selectedAreaChanged,
                this, &MainWindow::updateActions);
        connect(mapDocument, &MapDocument::selectedObjectsChanged,
                this, &MainWindow::updateActions);
    }

    mActionHandler->setMapDocument(mapDocument);
    mAutomappingManager->setMapDocument(mapDocument);

    updateWindowTitle();
    updateActions();
    updateZoomable();
}

void MainWindow::documentSaved(Document *document)
{
    if (Preferences::instance()->exportOnSave())
        exportDocument(document);
}

void MainWindow::closeDocument(int index)
{
    if (confirmSave(mDocumentManager->documents().at(index).data()))
        mDocumentManager->closeDocumentAt(index);
}

void MainWindow::currentEditorChanged(Editor *editor)
{
    for (QWidget *widget : mEditorStatusBarWidgets)
        statusBar()->removeWidget(widget);
    mEditorStatusBarWidgets.clear();

    if (!editor)
        return;

    const auto statusBarWidgets = editor->statusBarWidgets();
    int index = 2;  // start after the console and errors/warnings buttons
    for (QWidget *widget : statusBarWidgets) {
        statusBar()->insertWidget(index++, widget);
        widget->show(); // need to show because removeWidget hides explicitly
        mEditorStatusBarWidgets.append(widget);
    }

    const auto permanentStatusBarWidgets = editor->permanentStatusBarWidgets();
    for (QWidget *widget : permanentStatusBarWidgets) {
        statusBar()->insertPermanentWidget(index++, widget);
        widget->show(); // need to show because removeWidget hides explicitly
        mEditorStatusBarWidgets.append(widget);
    }
}

void MainWindow::reloadError(const QString &error)
{
    QMessageBox::critical(this, tr("Error Reloading Map"), error);
}

QList<QDockWidget *> MainWindow::allDockWidgets() const
{
    QList<QDockWidget*> docks = findChildren<QDockWidget*>(QString(), Qt::FindDirectChildrenOnly);

    const auto editors = mDocumentManager->editors();
    for (Editor *editor : editors)
        docks += editor->dockWidgets();

    return docks;
}

QList<QToolBar *> MainWindow::allToolBars() const
{
    QList<QToolBar*> toolBars = findChildren<QToolBar*>(QString(), Qt::FindDirectChildrenOnly);

    const auto editors = mDocumentManager->editors();
    for (Editor *editor : editors)
        toolBars += editor->toolBars();

    return toolBars;
}

#include "moc_mainwindow.cpp"
