// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-

const Clutter = imports.gi.Clutter;
const GdkPixbuf = imports.gi.GdkPixbuf
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const GObject = imports.gi.GObject;
const Signals = imports.signals;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;

// Use __ () and N__() for the extension gettext domain, and reuse
// the shell domain with the default _() and N_()
const Gettext = imports.gettext.domain('dashtodock');
const __ = Gettext.gettext;
const N__ = function(e) { return e };

const AppDisplay = imports.ui.appDisplay;
const AppFavorites = imports.ui.appFavorites;
const BoxPointer = imports.ui.boxpointer;
const Dash = imports.ui.dash;
const DND = imports.ui.dnd;
const IconGrid = imports.ui.iconGrid;
const Main = imports.ui.main;
const ParentalControlsManager = imports.misc.parentalControlsManager;
const PopupMenu = imports.ui.popupMenu;
const Util = imports.misc.util;
const Workspace = imports.ui.workspace;

const ExtensionUtils = imports.misc.extensionUtils;
const Me = ExtensionUtils.getCurrentExtension();
const Docking = Me.imports.docking;
const Utils = Me.imports.utils;
const WindowPreview = Me.imports.windowPreview;
const AppIconIndicators = Me.imports.appIconIndicators;
const DbusmenuUtils = Me.imports.dbusmenuUtils;

const tracker = Shell.WindowTracker.get_default();

const clickAction = {
    SKIP: 0,
    MINIMIZE: 1,
    LAUNCH: 2,
    CYCLE_WINDOWS: 3,
    MINIMIZE_OR_OVERVIEW: 4,
    PREVIEWS: 5,
    MINIMIZE_OR_PREVIEWS: 6,
    FOCUS_OR_PREVIEWS: 7,
    FOCUS_MINIMIZE_OR_PREVIEWS: 8,
    QUIT: 9
};

const scrollAction = {
    DO_NOTHING: 0,
    CYCLE_WINDOWS: 1,
    SWITCH_WORKSPACE: 2
};

let recentlyClickedAppLoopId = 0;
let recentlyClickedApp = null;
let recentlyClickedAppWindows = null;
let recentlyClickedAppIndex = 0;
let recentlyClickedAppMonitor = -1;

/**
 * Extend AppIcon
 *
 * - Apply a css class based on the number of windows of each application (#N);
 * - Customized indicators for running applications in place of the default "dot" style which is hidden (#N);
 *   a class of the form "running#N" is applied to the AppWellIcon actor.
 *   like the original .running one.
 * - Add a .focused style to the focused app
 * - Customize click actions.
 * - Update minimization animation target
 * - Update menu if open on windows change
 */
var DockAbstractAppIcon = GObject.registerClass({
    GTypeFlags: GObject.TypeFlags.ABSTRACT,
    Properties: {
        'focused': GObject.ParamSpec.boolean(
            'focused', 'focused', 'focused',
            GObject.ParamFlags.READWRITE,
            false),
        'running': GObject.ParamSpec.boolean(
            'running', 'running', 'running',
            GObject.ParamFlags.READWRITE,
            false),
        'urgent': GObject.ParamSpec.boolean(
            'urgent', 'urgent', 'urgent',
            GObject.ParamFlags.READWRITE,
            false),
        'windows-count': GObject.ParamSpec.uint(
            'windows-count', 'windows-count', 'windows-count',
            GObject.ParamFlags.READWRITE,
            0, GLib.MAXUINT32, 0),
    }
}, class DockAbstractAppIcon extends Dash.DashIcon {
    // settings are required inside.
    _init(app, monitorIndex, iconAnimator) {
        super._init(app);

        // a prefix is required to avoid conflicting with the parent class variable
        this.monitorIndex = monitorIndex;
        this._signalsHandler = new Utils.GlobalSignalsHandler(this);
        this.iconAnimator = iconAnimator;
        this._indicator = new AppIconIndicators.AppIconIndicator(this);

        // Monitor windows-changes instead of app state.
        // Keep using the same Id and function callback (that is extended)
        if (this._stateChangedId > 0) {
            this.app.disconnect(this._stateChangedId);
            this._stateChangedId = 0;
        }

        this._signalsHandler.add(this.app, 'windows-changed', () => this._updateWindows());
        this._signalsHandler.add(this.app, 'notify::state', () => this._updateRunningState());
        this._signalsHandler.add(global.display, 'window-demands-attention', (_dpy, window) =>
            this._onWindowDemandsAttention(window));
        this._signalsHandler.add(global.display, 'window-marked-urgent', (_dpy, window) =>
            this._onWindowDemandsAttention(window));

        // In Wayland sessions, this signal is needed to track the state of windows dragged
        // from one monitor to another. As this is triggered quite often (whenever a new winow
        // of any application opened or moved to a different desktop),
        // we restrict this signal to  the case when 'isolate-monitors' is true,
        // and if there are at least 2 monitors.
        if (Docking.DockManager.settings.get_boolean('isolate-monitors') &&
            Main.layoutManager.monitors.length > 1) {
            this._signalsHandler.removeWithLabel('isolate-monitors');
            this._signalsHandler.addWithLabel('isolate-monitors',
                global.display,
                'window-entered-monitor',
                this._onWindowEntered.bind(this));
        }

        this.connect('notify::running', () => {
            if (this.running)
                this.add_style_class_name('running');
            else
                this.remove_style_class_name('running');
        });

        this.connect('notify::focused', () => {
            if (this.focused)
                this.add_style_class_name('focused');
            else
                this.remove_style_class_name('focused');
        })

        this.connect('notify::urgent', () => {
            const icon = this.icon._iconBin;
            this._signalsHandler.removeWithLabel('urgent-windows')
            if (this.urgent) {
                icon.set_pivot_point(0.5, 0.5);
                this.iconAnimator.addAnimation(icon, 'dance');
                if (!this._urgentWindows.size) {
                    const urgentWindows = this.getInterestingWindows();
                    urgentWindows.forEach(w => (w._manualUrgency = true));
                    this._updateUrgentWindows(urgentWindows);
                }
            } else {
                this.iconAnimator.removeAnimation(icon, 'dance');
                icon.rotation_angle_z = 0;
                this._urgentWindows.forEach(w => (delete w._manualUrgency));
                this._updateUrgentWindows();
            }
        });

        this._urgentWindows = new Set();
        this._progressOverlayArea = null;
        this._progress = 0;

        let keys = ['apply-custom-theme',
                   'running-indicator-style',
                    ];

        keys.forEach(key => {
            this._signalsHandler.add(
                Docking.DockManager.settings,
                'changed::' + key, () => {
                    this._indicator.destroy();
                    this._indicator = new AppIconIndicators.AppIconIndicator(this);
                }
            );
        });

        this._updateState();
        this._numberOverlay();
        this.updateIconGeometry();

        this._previewMenuManager = null;
        this._previewMenu = null;
    }

    _onDestroy() {
        super._onDestroy();

        // This is necessary due to an upstream bug
        // https://bugzilla.gnome.org/show_bug.cgi?id=757556
        // It can be safely removed once it get solved upstrea.
        if (this._menu)
            this._menu.close(false);
    }

    ownsWindow(window) {
        return this.app === tracker.get_window_app(window);
    }

    _onWindowEntered(metaScreen, monitorIndex, metaWin) {
        if (this.ownsWindow(metaWin))
            this._updateWindows();
    }

    vfunc_scroll_event(scrollEvent) {
        let settings = Docking.DockManager.settings;
        let isEnabled = settings.get_enum('scroll-action') === scrollAction.CYCLE_WINDOWS;
        if (!isEnabled)
            return Clutter.EVENT_PROPAGATE;

        // We only activate windows of running applications, i.e. we never open new windows
        // We check if the app is running, and that the # of windows is > 0 in
        // case we use workspace isolation,
        if (!this.running)
            return Clutter.EVENT_PROPAGATE;

        if (this._optionalScrollCycleWindowsDeadTimeId)
            return Clutter.EVENT_PROPAGATE;
        else
            this._optionalScrollCycleWindowsDeadTimeId = GLib.timeout_add(
                GLib.PRIORITY_DEFAULT, 250, () => {
                this._optionalScrollCycleWindowsDeadTimeId = 0;
            });

        let direction = null;

        switch (scrollEvent.direction) {
        case Clutter.ScrollDirection.UP:
            direction = Meta.MotionDirection.UP;
            break;
        case Clutter.ScrollDirection.DOWN:
            direction = Meta.MotionDirection.DOWN;
            break;
        case Clutter.ScrollDirection.SMOOTH:
            let [, dy] = Clutter.get_current_event().get_scroll_delta();
            if (dy < 0)
                direction = Meta.MotionDirection.UP;
            else if (dy > 0)
                direction = Meta.MotionDirection.DOWN;
            break;
        }

        if (!Main.overview.visible) {
            let reversed = direction === Meta.MotionDirection.UP;
            if (this.focused && !this._urgentWindows.size)
                this._cycleThroughWindows(reversed);
            else {
                // Activate the first window
                let windows = this.getInterestingWindows();
                if (windows.length > 0) {
                    let w = windows[0];
                    Main.activateWindow(w);
                }
            }
        }
        else
            this.app.activate();
        return Clutter.EVENT_STOP;
    }

    _updateWindows() {
        if (this._menu && this._menu.isOpen)
            this._menu.update();

        this._updateState();
        this.updateIconGeometry();
    }

    _updateState() {
        this._urgentWindows.clear();
        const interestingWindows = this.getInterestingWindows();
        this.windowsCount = interestingWindows.length;
        this._updateRunningState();
        this._updateFocusState();
        this._updateUrgentWindows(interestingWindows);
    }

    _updateRunningState() {
        this.running = (this.app.state === Shell.AppState.RUNNING) && this.windowsCount;
    }

    _updateFocusState() {
        this.focused = (tracker.focus_app === this.app && this.running);
    }

    _updateUrgentWindows(interestingWindows) {
        this._signalsHandler.removeWithLabel('urgent-windows')
        this._urgentWindows.clear();
        if (interestingWindows === undefined)
            interestingWindows = this.getInterestingWindows();
        interestingWindows.forEach(win => {
            if (win.urgent || win.demandsAttention || win._manualUrgency)
                this._addUrgentWindow(win);
        });
        this.urgent = !!this._urgentWindows.size;
    }

    _onWindowDemandsAttention(window) {
        if (this.ownsWindow(window))
            this._addUrgentWindow(window);
    }

    _addUrgentWindow(window) {
        if (this._urgentWindows.has(window))
            return;

        if (window._manualUrgency && window.has_focus()) {
            delete window._manualUrgency;
            return;
        }

        this._urgentWindows.add(window);
        this.urgent = true;

        const onDemandsAttentionChanged = () => {
            if (!window.demandsAttention && !window.urgent && !window._manualUrgency)
                this._updateUrgentWindows();
        };

        if (window.demandsAttention)
            this._signalsHandler.addWithLabel('urgent-windows', window,
                'notify::demands-attention', () => onDemandsAttentionChanged());
        if (window.urgent)
            this._signalsHandler.addWithLabel('urgent-windows', window,
                'notify::urgent', () => onDemandsAttentionChanged());
        if (window._manualUrgency) {
            this._signalsHandler.addWithLabel('urgent-windows', window,
                'focus', () => {
                    delete window._manualUrgency;
                    onDemandsAttentionChanged()
                });
        }
    }

    /**
     * Update taraget for minimization animation
     */
    updateIconGeometry() {
        // If (for unknown reason) the actor is not on the stage the reported size
        // and position are random values, which might exceeds the integer range
        // resulting in an error when assigned to the a rect. This is a more like
        // a workaround to prevent flooding the system with errors.
        if (this.get_stage() == null)
            return;

        let rect = new Meta.Rectangle();

        [rect.x, rect.y] = this.get_transformed_position();
        [rect.width, rect.height] = this.get_transformed_size();

        let windows = this.getWindows();
        if (Docking.DockManager.settings.get_boolean('multi-monitor')) {
            let monitorIndex = this.monitorIndex;
            windows = windows.filter(function(w) {
                return w.get_monitor() == monitorIndex;
            });
        }
        windows.forEach(function(w) {
            w.set_icon_geometry(rect);
        });
    }

    _updateRunningStyle() {
        // The logic originally in this function has been moved to
        // AppIconIndicatorBase._updateDefaultDot(). However it cannot be removed as
        // it called by the parent constructor.
    }

    popupMenu() {
        this._removeMenuTimeout();
        this.fake_release();
        this._draggable.fakeRelease();

        if (!this._menu) {
            this._menu = new DockAppIconMenu(this);
            this._menu.connect('activate-window', (menu, window) => {
                Main.activateWindow(window);
            });
            this._menu.connect('open-state-changed', (menu, isPoppedUp) => {
                if (!isPoppedUp)
                    this._onMenuPoppedDown();
                else {
                    // Setting the max-height is s useful if part of the menu is
                    // scrollable so the minimum height is smaller than the natural height.
                    let monitor_index = Main.layoutManager.findIndexForActor(this);
                    let workArea = Main.layoutManager.getWorkAreaForMonitor(monitor_index);
                    let position = Utils.getPosition();
                    this._isHorizontal = ( position == St.Side.TOP ||
                                           position == St.Side.BOTTOM);
                    // If horizontal also remove the height of the dash
                    const { dockFixed: fixedDock } = Docking.DockManager.settings;
                    let additional_margin = this._isHorizontal && !fixedDock ? Main.overview.dash.height : 0;
                    let verticalMargins = this._menu.actor.margin_top + this._menu.actor.margin_bottom;
                    // Also set a max width to the menu, so long labels (long windows title) get truncated
                    this._menu.actor.style = ('max-height: ' + Math.round(workArea.height - additional_margin - verticalMargins) + 'px;' +
                                              'max-width: 400px');
                }
            });
            let id = Main.overview.connect('hiding', () => {
                this._menu.close();
            });
            this._menu.actor.connect('destroy', function() {
                Main.overview.disconnect(id);
            });

            this._menuManager.addMenu(this._menu);
        }

        this.emit('menu-state-changed', true);

        this.set_hover(true);
        this._menu.popup();
        this._menuManager.ignoreRelease();
        this.emit('sync-tooltip');

        return false;
    }

    activate(button) {
        let event = Clutter.get_current_event();
        let modifiers = event ? event.get_state() : 0;

        // Only consider SHIFT and CONTROL as modifiers (exclude SUPER, CAPS-LOCK, etc.)
        modifiers = modifiers & (Clutter.ModifierType.SHIFT_MASK | Clutter.ModifierType.CONTROL_MASK);

        // We don't change the CTRL-click behaviour: in such case we just chain
        // up the parent method and return.
        if (modifiers & Clutter.ModifierType.CONTROL_MASK) {
                // Keep default behaviour: launch new window
                // By calling the parent method I make it compatible
                // with other extensions tweaking ctrl + click
                super.activate(button);
                return;
        }

        // We check what type of click we have and if the modifier SHIFT is
        // being used. We then define what buttonAction should be for this
        // event.
        let buttonAction = 0;
        let settings = Docking.DockManager.settings;
        if (button && button == 2 ) {
            if (modifiers & Clutter.ModifierType.SHIFT_MASK)
                buttonAction = settings.get_enum('shift-middle-click-action');
            else
                buttonAction = settings.get_enum('middle-click-action');
        }
        else if (button && button == 1) {
            if (modifiers & Clutter.ModifierType.SHIFT_MASK)
                buttonAction = settings.get_enum('shift-click-action');
            else
                buttonAction = settings.get_enum('click-action');
        }

        // We check if the app is running, and that the # of windows is > 0 in
        // case we use workspace isolation.
        let windows = this.getInterestingWindows();

        // Some action modes (e.g. MINIMIZE_OR_OVERVIEW) require overview to remain open
        // This variable keeps track of this
        let shouldHideOverview = true;

        // We customize the action only when the application is already running
        if (this.running) {
            const hasUrgentWindows = !!this._urgentWindows.size;
            const singleOrUrgentWindows = windows.length === 1 || hasUrgentWindows;
            switch (buttonAction) {
            case clickAction.MINIMIZE:
                // In overview just activate the app, unless the acion is explicitely
                // requested with a keyboard modifier
                if (!Main.overview.visible || modifiers){
                    // If we have button=2 or a modifier, allow minimization even if
                    // the app is not focused
                    if ((this.focused && !hasUrgentWindows) || button === 2 || modifiers & Clutter.ModifierType.SHIFT_MASK) {
                        // minimize all windows on double click and always in the case of primary click without
                        // additional modifiers
                        let click_count = 0;
                        if (Clutter.EventType.CLUTTER_BUTTON_PRESS)
                            click_count = event.get_click_count();
                        let all_windows = (button == 1 && ! modifiers) || click_count > 1;
                        this._minimizeWindow(all_windows);
                    }
                    else
                        this._activateAllWindows();
                }
                else {
                    let w = windows[0];
                    Main.activateWindow(w);
                }
                break;

            case clickAction.MINIMIZE_OR_OVERVIEW:
                // When a single window is present, toggle minimization
                // If only one windows is present toggle minimization, but only when trigggered with the
                // simple click action (no modifiers, no middle click).
                if (singleOrUrgentWindows && !modifiers && button == 1) {
                    let w = windows[0];
                    if (this.focused) {
                        // Window is raised, minimize it
                        this._minimizeWindow(w);
                    } else {
                        // Window is minimized, raise it
                        Main.activateWindow(w);
                    }
                    // Launch overview when multiple windows are present
                    // TODO: only show current app windows when gnome shell API will allow it
                } else {
                    shouldHideOverview = false;
                    Main.overview.toggle();
                }
                break;

            case clickAction.CYCLE_WINDOWS:
                if (!Main.overview.visible) {
                    if (this.focused && !hasUrgentWindows)
                        this._cycleThroughWindows();
                    else {
                        // Activate the first window
                        let w = windows[0];
                        Main.activateWindow(w);
                    }
                }
                else
                    this.app.activate();
                break;

            case clickAction.FOCUS_OR_PREVIEWS:
                if (this.focused && !hasUrgentWindows &&
                    (windows.length > 1 || modifiers || button != 1)) {
                    this._windowPreviews();
                } else {
                    // Activate the first window
                    let w = windows[0];
                    Main.activateWindow(w);
                }
                break;

            case clickAction.FOCUS_MINIMIZE_OR_PREVIEWS:
                if (this.focused && !hasUrgentWindows) {
                    if (windows.length > 1 || modifiers || button != 1)
                        this._windowPreviews();
                    else if (!Main.overview.visible)
                        this._minimizeWindow();
                } else {
                    // Activate the first window
                    let w = windows[0];
                    Main.activateWindow(w);
                }
                break;

            case clickAction.LAUNCH:
                this.launchNewWindow();
                break;

            case clickAction.PREVIEWS:
                if (!Main.overview.visible) {
                    // If only one windows is present just switch to it, but only when trigggered with the
                    // simple click action (no modifiers, no middle click).
                    if (singleOrUrgentWindows && !modifiers && button == 1) {
                        let w = windows[0];
                        Main.activateWindow(w);
                    } else
                        this._windowPreviews();
                }
                else {
                    this.app.activate();
                }
                break;

            case clickAction.MINIMIZE_OR_PREVIEWS:
                // When a single window is present, toggle minimization
                // If only one windows is present toggle minimization, but only when trigggered with the
                // simple click action (no modifiers, no middle click).
                if (!Main.overview.visible) {
                    if (singleOrUrgentWindows && !modifiers && button == 1) {
                        let w = windows[0];
                        if (this.focused) {
                            // Window is raised, minimize it
                            this._minimizeWindow(w);
                        } else {
                            // Window is minimized, raise it
                            Main.activateWindow(w);
                        }
                    } else {
                        // Launch previews when multiple windows are present
                        this._windowPreviews();
                    }
                } else {
                    this.app.activate();
                }
                break;

            case clickAction.QUIT:
                this.closeAllWindows();
                break;

            case clickAction.SKIP:
                let w = windows[0];
                Main.activateWindow(w);
                break;
            }
        }
        else {
            this.launchNewWindow();
        }

        // Hide overview except when action mode requires it
        if(shouldHideOverview) {
            Main.overview.hide();
        }
    }

    shouldShowTooltip() {
        return this.hover && (!this._menu || !this._menu.isOpen) &&
                            (!this._previewMenu || !this._previewMenu.isOpen);
    }

    _windowPreviews() {
        if (!this._previewMenu) {
            this._previewMenuManager = new PopupMenu.PopupMenuManager(this);

            this._previewMenu = new WindowPreview.WindowPreviewMenu(this);

            this._previewMenuManager.addMenu(this._previewMenu);

            this._previewMenu.connect('open-state-changed', (menu, isPoppedUp) => {
                if (!isPoppedUp)
                    this._onMenuPoppedDown();
            });
            let id = Main.overview.connect('hiding', () => {
                this._previewMenu.close();
            });
            this._previewMenu.actor.connect('destroy', function() {
                Main.overview.disconnect(id);
            });

        }

        if (this._previewMenu.isOpen)
            this._previewMenu.close();
        else
            this._previewMenu.popup();

        return false;
    }

    // Try to do the right thing when attempting to launch a new window of an app. In
    // particular, if the application doens't allow to launch a new window, activate
    // the existing window instead.
    launchNewWindow(p) {
        let appInfo = this.app.get_app_info();
        let actions = appInfo.list_actions();
        if (this.app.can_open_new_window()) {
            this.animateLaunch();
            // This is used as a workaround for a bug resulting in no new windows being opened
            // for certain running applications when calling open_new_window().
            //
            // https://bugzilla.gnome.org/show_bug.cgi?id=756844
            //
            // Similar to what done when generating the popupMenu entries, if the application provides
            // a "New Window" action, use it instead of directly requesting a new window with
            // open_new_window(), which fails for certain application, notably Nautilus.
            if (actions.indexOf('new-window') == -1) {
                this.app.open_new_window(-1);
            }
            else {
                let i = actions.indexOf('new-window');
                if (i !== -1)
                    this.app.launch_action(actions[i], global.get_current_time(), -1);
            }
        }
        else {
            // Try to manually activate the first window. Otherwise, when the app is activated by
            // switching to a different workspace, a launch spinning icon is shown and disappers only
            // after a timeout.
            let windows = this.getWindows();
            if (windows.length > 0)
                Main.activateWindow(windows[0])
            else
                this.app.activate();
        }
    }

    _numberOverlay() {
        // Add label for a Hot-Key visual aid
        this._numberOverlayLabel = new St.Label();
        this._numberOverlayBin = new St.Bin({
            child: this._numberOverlayLabel,
            x_align: Clutter.ActorAlign.START,
            y_align: Clutter.ActorAlign.START,
            x_expand: true, y_expand: true
        });
        this._numberOverlayLabel.add_style_class_name('number-overlay');
        this._numberOverlayOrder = -1;
        this._numberOverlayBin.hide();

        this._iconContainer.add_child(this._numberOverlayBin);

    }

    updateNumberOverlay() {
        // We apply an overall scale factor that might come from a HiDPI monitor.
        // Clutter dimensions are in physical pixels, but CSS measures are in logical
        // pixels, so make sure to consider the scale.
        let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
        // Set the font size to something smaller than the whole icon so it is
        // still visible. The border radius is large to make the shape circular
        let [minWidth, natWidth] = this._iconContainer.get_preferred_width(-1);
        let font_size = Math.round(Math.max(12, 0.3*natWidth) / scaleFactor);
        let size = Math.round(font_size*1.2);
        this._numberOverlayLabel.set_style(
           'font-size: ' + font_size + 'px;' +
           'border-radius: ' + this.icon.iconSize + 'px;' +
           'width: ' + size + 'px; height: ' + size +'px;'
        );
    }

    setNumberOverlay(number) {
        this._numberOverlayOrder = number;
        this._numberOverlayLabel.set_text(number.toString());
    }

    toggleNumberOverlay(activate) {
        if (activate && this._numberOverlayOrder > -1) {
            this.updateNumberOverlay();
            this._numberOverlayBin.show();
        }
        else
            this._numberOverlayBin.hide();
    }

    _minimizeWindow(param) {
        // Param true make all app windows minimize
        let windows = this.getInterestingWindows();
        let current_workspace = global.workspace_manager.get_active_workspace();
        for (let i = 0; i < windows.length; i++) {
            let w = windows[i];
            if (w.get_workspace() == current_workspace && w.showing_on_its_workspace()) {
                w.minimize();
                // Just minimize one window. By specification it should be the
                // focused window on the current workspace.
                if(!param)
                    break;
            }
        }
    }

    // By default only non minimized windows are activated.
    // This activates all windows in the current workspace.
    _activateAllWindows() {
        // First activate first window so workspace is switched if needed.
        // We don't do this if isolation is on!
        if (!Docking.DockManager.settings.get_boolean('isolate-workspaces') &&
            !Docking.DockManager.settings.get_boolean('isolate-monitors'))
            this.app.activate();

        // then activate all other app windows in the current workspace
        let windows = this.getInterestingWindows();
        let activeWorkspace = global.workspace_manager.get_active_workspace_index();

        if (windows.length <= 0)
            return;

        let activatedWindows = 0;

        for (let i = windows.length - 1; i >= 0; i--) {
            if (windows[i].get_workspace().index() == activeWorkspace) {
                Main.activateWindow(windows[i]);
                activatedWindows++;
            }
        }
    }

    //This closes all windows of the app.
    closeAllWindows() {
        let windows = this.getInterestingWindows();
        const time = global.get_current_time();
        windows.forEach(w => w.delete(time));
    }

    _cycleThroughWindows(reversed) {
        // Store for a little amount of time last clicked app and its windows
        // since the order changes upon window interaction
        let MEMORY_TIME=3000;

        let app_windows = this.getInterestingWindows();

        if (app_windows.length <1)
            return

        if (recentlyClickedAppLoopId > 0)
            GLib.source_remove(recentlyClickedAppLoopId);
        recentlyClickedAppLoopId = GLib.timeout_add(
            GLib.PRIORITY_DEFAULT, MEMORY_TIME, this._resetRecentlyClickedApp);

        // If there isn't already a list of windows for the current app,
        // or the stored list is outdated, use the current windows list.
        let monitorIsolation = Docking.DockManager.settings.get_boolean('isolate-monitors');
        if (!recentlyClickedApp ||
            recentlyClickedApp.get_id() != this.app.get_id() ||
            recentlyClickedAppWindows.length != app_windows.length ||
            (recentlyClickedAppMonitor != this.monitorIndex && monitorIsolation)) {
            recentlyClickedApp = this.app;
            recentlyClickedAppWindows = app_windows;
            recentlyClickedAppMonitor = this.monitorIndex;
            recentlyClickedAppIndex = 0;
        }

        if (reversed) {
            recentlyClickedAppIndex--;
            if (recentlyClickedAppIndex < 0) recentlyClickedAppIndex = recentlyClickedAppWindows.length - 1;
        } else {
            recentlyClickedAppIndex++;
        }
        let index = recentlyClickedAppIndex % recentlyClickedAppWindows.length;
        let window = recentlyClickedAppWindows[index];

        Main.activateWindow(window);
    }

    _resetRecentlyClickedApp() {
        if (recentlyClickedAppLoopId > 0)
            GLib.source_remove(recentlyClickedAppLoopId);
        recentlyClickedAppLoopId=0;
        recentlyClickedApp =null;
        recentlyClickedAppWindows = null;
        recentlyClickedAppIndex = 0;
        recentlyClickedAppMonitor = -1;

        return false;
    }

    getWindows() {
        return this.app.get_windows();
    }

    // Filter out unnecessary windows, for instance
    // nautilus desktop window.
    getInterestingWindows() {
        const interestingWindows = getInterestingWindows(this.getWindows(),
            this.monitorIndex);

        if (!this._urgentWindows.size)
            return interestingWindows;

        return [...new Set([...this._urgentWindows, ...interestingWindows])];
    }
});

var DockAppIcon = GObject.registerClass({
}, class DockAppIcon extends DockAbstractAppIcon {
    _init(app, monitorIndex, iconAnimator) {
        super._init(app, monitorIndex, iconAnimator);

        this._signalsHandler.add(tracker, 'notify::focus-app', () => this._updateFocusState());
    }
});

var DockLocationAppIcon = GObject.registerClass({
}, class DockLocationAppIcon extends DockAbstractAppIcon {
    _init(app, monitorIndex, iconAnimator) {
        if (!app.location)
            throw new Error('Provided application %s has no location'.format(app));

        super._init(app, monitorIndex, iconAnimator);

        if (Docking.DockManager.settings.isolateLocations) {
            this._signalsHandler.add(tracker, 'notify::focus-app', () => this._updateFocusState());
        } else {
            this._signalsHandler.add(global.display, 'notify::focus-window',
                () => this._updateFocusState());
        }
    }

    get location() {
        return this.app.location;
    }

    _updateFocusState() {
        if (Docking.DockManager.settings.isolateLocations)
            return super._updateFocusState();

        this.focused = (this.app.isFocused && this.running);
    }
});

function makeAppIcon(app, monitorIndex, iconAnimator) {
    if (app.location)
        return new DockLocationAppIcon(app, monitorIndex, iconAnimator);


    return new DockAppIcon(app, monitorIndex, iconAnimator);
}

let discreteGpuAvailable = AppDisplay.discreteGpuAvailable;

/**
 * DockAppIconMenu
 *
 * - set popup arrow side based on dash orientation
 * - Add close windows option based on quitfromdash extension
 *   (https://github.com/deuill/shell-extension-quitfromdash)
 * - Add open windows thumbnails instead of list
 * - update menu when application windows change
 */
const DockAppIconMenu = class DockAppIconMenu extends PopupMenu.PopupMenu {

    constructor(source) {
        super(source, 0.5, Utils.getPosition());

        this._signalsHandler = new Utils.GlobalSignalsHandler(this);

        // We want to keep the item hovered while the menu is up
        this.blockSourceEvents = true;

        this._source = source;
        this._parentalControlsManager = ParentalControlsManager.getDefault();

        this.actor.add_style_class_name('app-menu');
        this.actor.add_style_class_name('app-well-menu');
        this.actor.add_style_class_name('dock-app-menu');

        // Chain our visibility and lifecycle to that of the source
        this._signalsHandler.add(source, 'notify::mapped', () => {
            if (!source.mapped)
                this.close();
        });
        source.connect('destroy', () => this.destroy());

        Main.uiGroup.add_actor(this.actor);

        const { remoteModel } = Docking.DockManager.getDefault();
        const remoteModelApp = remoteModel?.lookupById(this._source?.app?.id);
        if (remoteModelApp && DbusmenuUtils.haveDBusMenu()) {
            const [onQuicklist, onDynamicSection] = Utils.splitHandler((sender, { quicklist }, dynamicSection) => {
                dynamicSection.removeAll();
                if (quicklist) {
                    quicklist.get_children().forEach(remoteItem =>
                        dynamicSection.addMenuItem(DbusmenuUtils.makePopupMenuItem(remoteItem, false)));
                }
            });

            this._signalsHandler.add([
                remoteModelApp,
                'quicklist-changed',
                onQuicklist
            ], [
                this,
                'dynamic-section-changed',
                onDynamicSection
            ]);
        }

        if (discreteGpuAvailable === undefined) {
            const updateDiscreteGpuAvailable = () => {
                const switcherooProxy = global.get_switcheroo_control();
                if (switcherooProxy) {
                    const prop = switcherooProxy.get_cached_property('HasDualGpu');
                    discreteGpuAvailable = prop?.unpack() ?? false;
                } else {
                    discreteGpuAvailable = false;
                }
            }
            updateDiscreteGpuAvailable();
            global.connect('notify::switcheroo-control',
                () => updateDiscreteGpuAvailable());
        }
    }

    _appendSeparator() {
        this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
    }

    _appendMenuItem(labelText) {
        const item = new PopupMenu.PopupMenuItem(labelText);
        this.addMenuItem(item);
        return item;
    }

    popup(_activatingButton) {
        this._rebuildMenu();
        this.open(BoxPointer.PopupAnimation.FULL);
    }

    _rebuildMenu() {
        this.removeAll();

        if (Docking.DockManager.settings.get_boolean('show-windows-preview')) {
            // Display the app windows menu items and the separator between windows
            // of the current desktop and other windows.

            this._allWindowsMenuItem = new PopupMenu.PopupSubMenuMenuItem(__('All Windows'), false);
            this._allWindowsMenuItem.hide();
            this.addMenuItem(this._allWindowsMenuItem);
        } else {
            const windows = this._source.getInterestingWindows().filter(
                w => !w.skip_taskbar);

            if (windows.length > 0) {
                this.addMenuItem(
                    /* Translators: This is the heading of a list of open windows */
                    new PopupMenu.PopupSeparatorMenuItem(_('Open Windows')));
            }

            windows.forEach(window => {
                let title = window.title
                    ? window.title : this._source.app.get_name();
                let item = this._appendMenuItem(title);
                item.connect('activate', () => {
                    this.emit('activate-window', window);
                });
            });
        }

        if (!this._source.app.is_window_backed()) {
            this._appendSeparator();

            let appInfo = this._source.app.get_app_info();
            let actions = appInfo.list_actions();
            if (this._source.app.can_open_new_window() &&
                actions.indexOf('new-window') == -1) {
                this._newWindowMenuItem = this._appendMenuItem(_('New Window'));
                this._newWindowMenuItem.connect('activate', () => {
                    if (this._source.app.state == Shell.AppState.STOPPED)
                        this._source.animateLaunch();

                    this._source.app.open_new_window(-1);
                    this.emit('activate-window', null);
                });
                this._appendSeparator();
            }

            if (discreteGpuAvailable &&
                this._source.app.state == Shell.AppState.STOPPED) {
                const appPrefersNonDefaultGPU = appInfo.get_boolean('PrefersNonDefaultGPU');
                const gpuPref = appPrefersNonDefaultGPU
                    ? Shell.AppLaunchGpu.DEFAULT
                    : Shell.AppLaunchGpu.DISCRETE;
                this._onGpuMenuItem = this._appendMenuItem(appPrefersNonDefaultGPU
                    ? _('Launch using Integrated Graphics Card')
                    : _('Launch using Discrete Graphics Card'));
                this._onGpuMenuItem.connect('activate', () => {
                    this._source.animateLaunch();
                    this._source.app.launch(0, -1, gpuPref);
                    this.emit('activate-window', null);
                });
            }

            for (let i = 0; i < actions.length; i++) {
                let action = actions[i];
                let item = this._appendMenuItem(appInfo.get_action_name(action));
                item.connect('activate', (emitter, event) => {
                    this._source.app.launch_action(action, event.get_time(), -1);
                    this.emit('activate-window', null);
                });
            }

            let canFavorite = global.settings.is_writable('favorite-apps') &&
                (this._source instanceof DockAppIcon) &&
                this._parentalControlsManager.shouldShowApp(this._source.app.app_info);

            if (canFavorite) {
                this._appendSeparator();

                let isFavorite = AppFavorites.getAppFavorites().isFavorite(this._source.app.get_id());

                if (isFavorite) {
                    let item = this._appendMenuItem(_('Remove from Favorites'));
                    item.connect('activate', () => {
                        let favs = AppFavorites.getAppFavorites();
                        favs.removeFavorite(this._source.app.get_id());
                    });
                } else {
                    let item = this._appendMenuItem(_('Add to Favorites'));
                    item.connect('activate', () => {
                        let favs = AppFavorites.getAppFavorites();
                        favs.addFavorite(this._source.app.get_id());
                    });
                }
            }

            if (Shell.AppSystem.get_default().lookup_app('org.gnome.Software.desktop') &&
                (this._source instanceof DockAppIcon)) {
                this._appendSeparator();
                let item = this._appendMenuItem(_('Show Details'));
                item.connect('activate', () => {
                    let id = this._source.app.get_id();
                    let args = GLib.Variant.new('(ss)', [id, '']);
                    Gio.DBus.get(Gio.BusType.SESSION, null,
                        function(o, res) {
                            let bus = Gio.DBus.get_finish(res);
                            bus.call('org.gnome.Software',
                                        '/org/gnome/Software',
                                        'org.gtk.Actions', 'Activate',
                                        GLib.Variant.new('(sava{sv})',
                                                        ['details', [args], null]),
                                        null, 0, -1, null, null);
                            Main.overview.hide();
                        });
                });
            }
        }

        // dynamic menu
        const items = this._getMenuItems();
        let i = items.length;
        if (Shell.AppSystem.get_default().lookup_app('org.gnome.Software.desktop')) {
            i -= 2;
        }
        if (global.settings.is_writable('favorite-apps')) {
            i -= 2;
        }
        if (i < 0) {
            i = 0;
        }
        const dynamicSection = new PopupMenu.PopupMenuSection();
        this.addMenuItem(dynamicSection, i);
        this.emit('dynamic-section-changed', dynamicSection);

        // quit menu
        this._appendSeparator();
        this._quitfromDashMenuItem = this._appendMenuItem(_('Quit'));
        this._quitfromDashMenuItem.connect('activate', () => {
            this._source.closeAllWindows();
        });

        this.update();
    }

    // update menu content when application windows change. This is desirable as actions
    // acting on windows (closing) are performed while the menu is shown.
    update() {
      // update, show or hide the quit menu
      if (this._source.windowsCount > 0) {
          let quitFromDashMenuText = "";
          if (this._source.windowsCount == 1)
              this._quitfromDashMenuItem.label.set_text(_('Quit'));
          else
              this._quitfromDashMenuItem.label.set_text(__('Quit %d Windows').format(this._source.windowsCount));

          this._quitfromDashMenuItem.actor.show();

      } else {
          this._quitfromDashMenuItem.actor.hide();
      }

      if (Docking.DockManager.settings.get_boolean('show-windows-preview')){
          const windows = this._source.getInterestingWindows();

          // update, show, or hide the allWindows menu
          // Check if there are new windows not already displayed. In such case, repopulate the allWindows
          // menu. Windows removal is already handled by each preview being connected to the destroy signal
          let old_windows = this._allWindowsMenuItem.menu._getMenuItems().map(function(item){
              return item._window;
          });

          let new_windows = windows.filter(function(w) {return old_windows.indexOf(w) < 0;});
          if (new_windows.length > 0) {
              this._populateAllWindowMenu(windows);

              // Try to set the width to that of the submenu.
              // TODO: can't get the actual size, getting a bit less.
              // Temporary workaround: add 15px to compensate
              this._allWindowsMenuItem.width =  this._allWindowsMenuItem.menu.actor.width + 15;

          }

          // The menu is created hidden and never hidded after being shown. Instead, a singlal
          // connected to its items destroy will set is insensitive if no more windows preview are shown.
          if (windows.length > 0){
              this._allWindowsMenuItem.show();
              this._allWindowsMenuItem.setSensitive(true);
          }
      }

      // Update separators
      this._getMenuItems().forEach(item => {
          if ('label' in item) {
              this._updateSeparatorVisibility(item);
          }
      });
    }

    _populateAllWindowMenu(windows) {

        this._allWindowsMenuItem.menu.removeAll();

            if (windows.length > 0) {

                let activeWorkspace = global.workspace_manager.get_active_workspace();
                let separatorShown =  windows[0].get_workspace() != activeWorkspace;

                for (let i = 0; i < windows.length; i++) {
                    let window = windows[i];
                    if (!separatorShown && window.get_workspace() != activeWorkspace) {
                        this._allWindowsMenuItem.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
                        separatorShown = true;
                    }

                    let item = new WindowPreview.WindowPreviewMenuItem(window);
                    this._allWindowsMenuItem.menu.addMenuItem(item);
                    item.connect('activate', () => {
                        this.emit('activate-window', window);
                    });

                    // This is to achieve a more gracefull transition when the last windows is closed.
                    item.connect('destroy', () => {
                        if(this._allWindowsMenuItem.menu._getMenuItems().length == 1) // It's still counting the item just going to be destroyed
                            this._allWindowsMenuItem.setSensitive(false);
                    });
                }
            }
    }
};

// Filter out unnecessary windows, for instance
// nautilus desktop window.
function getInterestingWindows(windows, monitorIndex) {
    let settings = Docking.DockManager.settings;

    // When using workspace isolation, we filter out windows
    // that are not in the current workspace
    if (settings.get_boolean('isolate-workspaces'))
        windows = windows.filter(function(w) {
            return w.get_workspace().index() == global.workspace_manager.get_active_workspace_index();
        });

    if (settings.get_boolean('isolate-monitors'))
        windows = windows.filter(function(w) {
            return w.get_monitor() == monitorIndex;
        });

    return windows;
}

/**
 * A ShowAppsIcon improved class.
 *
 * - set label position based on dash orientation (Note, I am reusing most machinery of the appIcon class)
 * - implement a popupMenu based on the AppIcon code (Note, I am reusing most machinery of the appIcon class)
 *
 */

var DockShowAppsIcon = GObject.registerClass({
    Signals: {
        'menu-state-changed': { param_types: [GObject.TYPE_BOOLEAN] },
        'sync-tooltip': {}
    }
}
, class DockShowAppsIcon extends Dash.ShowAppsIcon {
    _init() {
        super._init();

        // Re-use appIcon methods
        let appIconPrototype = AppDisplay.AppIcon.prototype;
        this.toggleButton.y_expand = false;
        this.toggleButton.connect('popup-menu',
            appIconPrototype._onKeyboardPopupMenu.bind(this));
        this.toggleButton.connect('clicked',
            this._removeMenuTimeout.bind(this));

        this.reactive = true;
        this.toggleButton.popupMenu = () => this.popupMenu.call(this);
        this.toggleButton._removeMenuTimeout = () => this._removeMenuTimeout.call(this);

        this._menu = null;
        this._menuManager = new PopupMenu.PopupMenuManager(this);
        this._menuTimeoutId = 0;
    }

    vfunc_leave_event(leaveEvent)
    {
        return AppDisplay.AppIcon.prototype.vfunc_leave_event.call(
            this.toggleButton, leaveEvent);
    }

    vfunc_button_press_event(buttonPressEvent)
    {
        return AppDisplay.AppIcon.prototype.vfunc_button_press_event.call(
            this.toggleButton, buttonPressEvent);
    }

    vfunc_touch_event(touchEvent)
    {
        return AppDisplay.AppIcon.prototype.vfunc_touch_event.call(
            this.toggleButton, touchEvent);
    }

    showLabel() {
        itemShowLabel.call(this);
    }

    _onMenuPoppedDown() {
        AppDisplay.AppIcon.prototype._onMenuPoppedDown.apply(this, arguments);
    }

    _setPopupTimeout() {
        AppDisplay.AppIcon.prototype._onMenuPoppedDown.apply(this, arguments);
    }

    _removeMenuTimeout() {
        AppDisplay.AppIcon.prototype._removeMenuTimeout.apply(this, arguments);
    }

    popupMenu() {
        this._removeMenuTimeout();
        this.toggleButton.fake_release();

        if (!this._menu) {
            this._menu = new DockShowAppsIconMenu(this);
            this._menu.connect('open-state-changed', (menu, isPoppedUp) => {
                if (!isPoppedUp)
                    this._onMenuPoppedDown();
            });
            let id = Main.overview.connect('hiding', () => {
                this._menu.close();
            });
            this._menu.actor.connect('destroy', function() {
                Main.overview.disconnect(id);
            });
            this._menuManager.addMenu(this._menu);
        }

        this.emit('menu-state-changed', true);

        this.toggleButton.set_hover(true);
        this._menu.popup();
        this._menuManager.ignoreRelease();
        this.emit('sync-tooltip');

        return false;
    }
});


/**
 * A menu for the showAppsIcon
 */
class DockShowAppsIconMenu extends DockAppIconMenu {
    _rebuildMenu() {
        this.removeAll();

        /* Translators: %s is "Settings", which is automatically translated. You
           can also translate the full message if this fits better your language. */
        let name = __('Dash to Dock %s').format(_('Settings'))
        let item = this._appendMenuItem(name);

        item.connect('activate', function () {
            ExtensionUtils.openPrefs();
        });
    }
};

/**
 * This function is used for both extendShowAppsIcon and extendDashItemContainer
 */
function itemShowLabel()  {
    // Check if the label is still present at all. When switching workpaces, the
    // item might have been destroyed in between.
    if (!this._labelText || this.label.get_stage() == null)
      return;

    this.label.set_text(this._labelText);
    this.label.opacity = 0;
    this.label.show();

    let [stageX, stageY] = this.get_transformed_position();
    let node = this.label.get_theme_node();

    let itemWidth  = this.allocation.x2 - this.allocation.x1;
    let itemHeight = this.allocation.y2 - this.allocation.y1;

    let labelWidth = this.label.get_width();
    let labelHeight = this.label.get_height();

    let x, y, xOffset, yOffset;

    let position = Utils.getPosition();
    this._isHorizontal = ((position == St.Side.TOP) || (position == St.Side.BOTTOM));
    let labelOffset = node.get_length('-x-offset');

    switch (position) {
    case St.Side.LEFT:
        yOffset = Math.floor((itemHeight - labelHeight) / 2);
        y = stageY + yOffset;
        xOffset = labelOffset;
        x = stageX + this.get_width() + xOffset;
        break;
    case St.Side.RIGHT:
        yOffset = Math.floor((itemHeight - labelHeight) / 2);
        y = stageY + yOffset;
        xOffset = labelOffset;
        x = Math.round(stageX) - labelWidth - xOffset;
        break;
    case St.Side.TOP:
        y = stageY + labelOffset + itemHeight;
        xOffset = Math.floor((itemWidth - labelWidth) / 2);
        x = stageX + xOffset;
        break;
    case St.Side.BOTTOM:
        yOffset = labelOffset;
        y = stageY - labelHeight - yOffset;
        xOffset = Math.floor((itemWidth - labelWidth) / 2);
        x = stageX + xOffset;
        break;
    }

    // keep the label inside the screen border
    // Only needed fot the x coordinate.

    // Leave a few pixel gap
    let gap = 5;
    let monitor = Main.layoutManager.findMonitorForActor(this);
    if (x - monitor.x < gap)
        x += monitor.x - x + labelOffset;
    else if (x + labelWidth > monitor.x + monitor.width - gap)
        x -= x + labelWidth - (monitor.x + monitor.width) + gap;

    this.label.remove_all_transitions();
    this.label.set_position(x, y);
    this.label.ease({
        opacity: 255,
        duration: Dash.DASH_ITEM_LABEL_SHOW_TIME,
        mode: Clutter.AnimationMode.EASE_OUT_QUAD
    });
}
