/*
 * This file is part of the Zorin Taskbar extension for Zorin OS.
 *
 * 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/>.
 *
 *
 * Credits:
 * This file is based on code from the Dash to Dock extension by micheleg
 * and code from the Dash to Panel extension
 * Some code was also adapted from the upstream Gnome Shell source code.
 */

import Clutter from 'gi://Clutter'
import GLib from 'gi://GLib'
import Gio from 'gi://Gio'
import Graphene from 'gi://Graphene'
import GObject from 'gi://GObject'
import Mtk from 'gi://Mtk'
import Shell from 'gi://Shell'
import St from 'gi://St'

import * as AppDisplay from 'resource:///org/gnome/shell/ui/appDisplay.js'
import * as AppMenu from 'resource:///org/gnome/shell/ui/appMenu.js'
import * as Dash from 'resource:///org/gnome/shell/ui/dash.js'
import * as DND from 'resource:///org/gnome/shell/ui/dnd.js'
import * as Main from 'resource:///org/gnome/shell/ui/main.js'
import * as PopupMenu from 'resource:///org/gnome/shell/ui/popupMenu.js'
import * as Util from 'resource:///org/gnome/shell/misc/util.js'
import * as BoxPointer from 'resource:///org/gnome/shell/ui/boxpointer.js'
import { EventEmitter } from 'resource:///org/gnome/shell/misc/signals.js'

import { Hold } from './intellihide.js'
import * as Utils from './utils.js'
import * as PanelSettings from './panelSettings.js';
import * as Taskbar from './taskbar.js'
import {
  DTP_EXTENSION,
  SETTINGS,
  DESKTOPSETTINGS,
  EXTENSION_PATH,
  tracker,
} from './extension.js'
import {
  gettext as _,
  ngettext,
} from 'resource:///org/gnome/shell/extensions/extension.js'

//timeout names
const T2 = 'mouseScrollTimeout'
const T3 = 'showDotsTimeout'
const T4 = 'overviewWindowDragEndTimeout'
const T5 = 'switchWorkspaceTimeout'
const T6 = 'displayProperIndicatorTimeout'

const SCROLL_ICON_DELAY = 400
const DOT_SIZE = 3

//right padding defined for .overview-label in stylesheet.css
const TITLE_RIGHT_PADDING = 8
const DOUBLE_CLICK_DELAY_MS = 450

let LABEL_GAP = 5
let MAX_INDICATORS = 4
export const DEFAULT_PADDING_SIZE = 0

let DOT_STYLE = {
  DOTS: 'DOTS',
  SQUARES: 'SQUARES',
  DASHES: 'DASHES',
  SEGMENTED: 'SEGMENTED',
  CILIORA: 'CILIORA',
  METRO: 'METRO',
  SOLID: 'SOLID',
}

let DOT_POSITION = {
  TOP: 'TOP',
  BOTTOM: 'BOTTOM',
  LEFT: 'LEFT',
  RIGHT: 'RIGHT',
}

let recentlyClickedAppLoopId = 0
let recentlyClickedApp = null
let recentlyClickedAppWindows = null
let recentlyClickedAppIndex = 0
let recentlyClickedAppMonitorIndex

/**
 * Extend AppIcon
 *
 * - Apply a css class based on the number of windows of each application (#N);
 * - Draw a dot for each window of the application based on 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
 *
 */

export const TaskbarAppIcon = GObject.registerClass(
  {},
  class TaskbarAppIcon extends AppDisplay.AppIcon {
    _init(appInfo, panel, iconParams, previewMenu, iconAnimator) {
      this.dtpPanel = panel
      this._nWindows = 0
      this.window = appInfo.window
      this.isLauncher = appInfo.isLauncher
      this._previewMenu = previewMenu
      this.iconAnimator = iconAnimator
      this.lastClick = 0
      this._appicon_normalstyle = ''
      this._appicon_hoverstyle = ''
      this._appicon_pressedstyle = ''

      super._init(appInfo.app, iconParams)

      this._signalsHandler = new Utils.GlobalSignalsHandler()
      this._timeoutsHandler = new Utils.TimeoutsHandler()

      // Fix touchscreen issues before the listener is added by the parent constructor.
      this._onTouchEvent = function (actor, event) {
        if (event.type() == Clutter.EventType.TOUCH_BEGIN) {
          // Open the popup menu on long press.
          this._setPopupTimeout()
        } else if (
          this._menuTimeoutId != 0 &&
          (event.type() == Clutter.EventType.TOUCH_END ||
            event.type() == Clutter.EventType.TOUCH_CANCEL)
        ) {
          // Activate/launch the application.
          this.activate(1)
          this._removeMenuTimeout()
        }
        // Disable dragging via touch screen as it's buggy as hell. Not perfect for tablet users, but the alternative is way worse.
        // Also, EVENT_PROPAGATE launches applications twice with this solution, so this.activate(1) above must only be called if there's already a window.
        return Clutter.EVENT_STOP
      }
      // Hack for missing TOUCH_END event.
      this._onLeaveEvent = function () {
        this.fake_release()
        if (this._menuTimeoutId != 0) this.activate(1) // Activate/launch the application if TOUCH_END didn't fire.
        this._removeMenuTimeout()
      }

      this._dot.set_width(0)
      this._isGroupApps = SETTINGS.get_boolean('group-apps')

      this._container = new St.Widget({
        style_class: 'dtp-container',
        layout_manager: new Clutter.BinLayout(),
      })
      this._dotsContainer = new St.Widget({
        style_class: 'dtp-dots-container',
        layout_manager: new Clutter.BinLayout(),
      })
      this._dtpIconContainer = new St.Widget({
        layout_manager: new Clutter.BinLayout(),
        style: getIconContainerStyle(panel.geom.vertical),
      })

      this.remove_child(this._iconContainer)
      this.icon._iconBin.set_pivot_point(0.5, 0.5)

      this._dtpIconContainer.add_child(this._iconContainer)

      if (appInfo.window) {
        let box = Utils.createBoxLayout()

        this._windowTitle = new St.Label({
          y_align: Clutter.ActorAlign.CENTER,
          x_align: Clutter.ActorAlign.START,
          style_class: 'overview-label',
        })

        this._updateWindowTitle()
        this._updateWindowTitleStyle()

        box.add_child(this._dtpIconContainer)
        box.add_child(this._windowTitle)

        this._dotsContainer.add_child(box)
      } else {
        this._dotsContainer.add_child(this._dtpIconContainer)
      }

      this._container.add_child(this._dotsContainer)
      this.set_child(this._container)

      if (panel.geom.vertical) {
        this.set_width(panel.geom.innerSize)
      }

      // 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._setAppIconPadding()
      this._showDots()
      this._numberOverlay()

      this._signalsHandler.add(
        [
          this,
          'notify::mapped',
          () =>
            this.mapped && !this.dtpPanel.intellihide.enabled
              ? this._handleNotifications()
              : null,
        ],
        [
          Utils.getStageTheme(),
          'changed',
          this._updateWindowTitleStyle.bind(this),
        ],
        [
          global.display,
          'notify::focus-window',
          this._onFocusAppChanged.bind(this),
        ],
        [this.app, 'windows-changed', this.onWindowsChanged.bind(this)],
      )

      if (!this.window) {
        if (SETTINGS.get_boolean('isolate-monitors')) {
          this._signalsHandler.add([
            Utils.DisplayWrapper.getScreen(),
            ['window-entered-monitor', 'window-left-monitor'],
            this.onWindowEnteredOrLeft.bind(this),
          ])
        }

        this._signalsHandler.add([
          Utils.DisplayWrapper.getScreen(),
          'in-fullscreen-changed',
          () => {
            if (
              global.display.focus_window?.get_monitor() ==
                this.dtpPanel.monitor.index &&
              !this.dtpPanel.monitor.inFullscreen
            ) {
              this._resetDots(true)
              this._displayProperIndicator()
            }
          },
        ])
      } else {
        this._signalsHandler.add(
          [this.window, 'notify::title', this._updateWindowTitle.bind(this)],
          [
            this.window,
            'notify::minimized',
            this._updateWindowTitleStyle.bind(this),
          ],
        )
      }

      this._signalsHandler.add(
        [this, 'scroll-event', this._onMouseScroll.bind(this)],
        [
          Main.overview,
          'window-drag-end',
          this._onOverviewWindowDragEnd.bind(this),
        ],
        [
          global.window_manager,
          'switch-workspace',
          this._onSwitchWorkspace.bind(this),
        ],
        [
          this,
          'notify::hover',
          () => {
            this._onAppIconHoverChanged()
            this._onAppIconHoverChanged_GtkWorkaround()
          },
        ],
        [
          this,
          'notify::pressed',
          this._onAppIconPressedChanged_GtkWorkaround.bind(this),
        ],
        [
          this.dtpPanel.panelManager.notificationsMonitor,
          `update-${this.app.id}`,
          this._handleNotifications.bind(this),
        ],
        [
          SETTINGS,
          'changed::progress-show-count',
          this._handleNotifications.bind(this),
        ],
        [
          SETTINGS,
          [
            'changed::panel-positions',
            'changed::dot-style-focused',
            'changed::dot-style-unfocused',
          ],
          this._settingsChangeRefresh.bind(this),
        ],
        [
          SETTINGS,
          [
            'changed::group-apps-label-max-width',
            'changed::group-apps-use-fixed-width',
          ],
          this._updateWindowTitleStyle.bind(this),
        ],
      )
    }

    getDragActor() {
      return this.app.create_icon_texture(this.dtpPanel.taskbar.iconSize)
    }

    shouldShowTooltip() {
      if (
        !SETTINGS.get_boolean('show-tooltip') ||
        (!this.isLauncher &&
          SETTINGS.get_boolean('show-window-previews') &&
          this.getAppIconInterestingWindows().length > 0)
      ) {
        return false
      } else {
        return (
          this.hover &&
          !this.window &&
          (!this._menu || !this._menu.isOpen) &&
          this._previewMenu.getCurrentAppIcon() !== this
        )
      }
    }

    _onAppIconHoverChanged() {
      if (
        !SETTINGS.get_boolean('show-window-previews') ||
        (!this.window && !this._nWindows)
      ) {
        return
      }

      if (this.hover) {
        this._previewMenu.requestOpen(this)
      } else {
        this._previewMenu.requestClose()
      }
    }

    _onDestroy() {
      super._onDestroy()

      if (this._updateIconIdleId) {
        GLib.source_remove(this._updateIconIdleId)
        this._updateIconIdleId = 0
      }

      this._timeoutsHandler.destroy()
      this._signalsHandler.destroy()

      this._previewMenu.close(true)
    }

    onWindowsChanged() {
      this._updateWindows()
      this.updateIcon()

      if (this._isGroupApps) this._setIconStyle()
    }

    onWindowEnteredOrLeft(display, number, metaWindow) {
      if (number > 0 && tracker.get_window_app(metaWindow) == this.app) {
        this._updateWindows()
        this._displayProperIndicator()
      }
    }

    updateTitleStyle() {
      this._updateWindowTitleStyle()
    }

    // Update indicator and target for minimization animation
    updateIcon() {
      // 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 || this._updateIconIdleId) return

      this._updateIconIdleId = GLib.idle_add(GLib.PRIORITY_LOW, () => {
        let rect = new Mtk.Rectangle()

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

        let windows = this.window
          ? [this.window]
          : this.getAppIconInterestingWindows(true)

        windows.forEach(function (w) {
          w.set_icon_geometry(rect)
        })

        this._updateIconIdleId = 0

        return GLib.SOURCE_REMOVE
      })
    }

    _onAppIconHoverChanged_GtkWorkaround() {
      if (this.hover && this._appicon_hoverstyle) {
        this._container.set_style(this._appicon_hoverstyle)
      } else if (this._appicon_normalstyle) {
        this._container.set_style(this._appicon_normalstyle)
      } else {
        this._container.set_style('')
      }
    }

    _onAppIconPressedChanged_GtkWorkaround() {
      if (this.pressed && this._appicon_pressedstyle) {
        this._container.set_style(this._appicon_pressedstyle)
      } else if (this.hover && this._appicon_hoverstyle) {
        this._container.set_style(this._appicon_hoverstyle)
      } else if (this._appicon_normalstyle) {
        this._container.set_style(this._appicon_normalstyle)
      } else {
        this._container.set_style('')
      }
    }

    _onMouseScroll(actor, event) {
      let scrollAction = SETTINGS.get_string('scroll-icon-action')

      if (
        scrollAction === 'NOTHING' ||
        (!this.window && !this._nWindows)
      ) {
        return
      }

      let direction = Utils.getMouseScrollDirection(event)

      if (direction && !this._timeoutsHandler.getId(T2)) {
        this._timeoutsHandler.add([
          T2,
          SCROLL_ICON_DELAY,
          () => {},
        ])

        let windows = this.getAppIconInterestingWindows()

        windows.sort(Taskbar.sortWindowsCompareFunction)
        Utils.activateSiblingWindow(windows, direction, this.window)
      }
    }

    _showDots() {
      // Just update style if dots already exist
      if (this._focusedDots && this._unfocusedDots) {
        this._updateWindows()
        return
      }

      if (!this._isGroupApps) {
        this._focusedDots = new St.Widget({
          layout_manager: new Clutter.BinLayout(),
          x_expand: true,
          y_expand: true,
          visible: false,
        })

        let mappedId = this.connect('notify::mapped', () => {
          this._displayProperIndicator()
          this.disconnect(mappedId)
        })
      } else {
        ;(this._focusedDots = new St.DrawingArea()),
          (this._unfocusedDots = new St.DrawingArea())

        this._focusedDots.connect('repaint', () => {
          if (!this._dashItemContainer.animatingOut)
            // don't draw and trigger more animations if the icon is in the middle of
            // being removed from the panel
            this._drawRunningIndicator(
              this._focusedDots,
              SETTINGS.get_string('dot-style-focused'),
              true,
            )
        })

        this._unfocusedDots.connect('repaint', () => {
          if (!this._dashItemContainer.animatingOut)
            this._drawRunningIndicator(
              this._unfocusedDots,
              SETTINGS.get_string('dot-style-unfocused'),
              false,
            )
        })

        this._dotsContainer.add_child(this._unfocusedDots)

        this._updateWindows()

        this._timeoutsHandler.add([
          T3,
          0,
          () => {
            this._resetDots()
            this._displayProperIndicator()
          },
        ])
      }

      this._dotsContainer.add_child(this._focusedDots)
    }

    _resetDots(ignoreSizeReset) {
      let position = PanelSettings.getPanelPosition(SETTINGS, this.dtpPanel.monitor.index)
      let isHorizontalDots =
        position == DOT_POSITION.TOP || position == DOT_POSITION.BOTTOM
      let sizeProp = isHorizontalDots ? 'width' : 'height'
      let focusedDotStyle = SETTINGS.get_string('dot-style-focused')
      let unfocusedDotStyle = SETTINGS.get_string('dot-style-unfocused')

      this._focusedIsWide = this._isWideDotStyle(focusedDotStyle)
      this._unfocusedIsWide = this._isWideDotStyle(unfocusedDotStyle)
      ;[, this._containerSize] =
        this._container[`get_preferred_${sizeProp}`](-1)

      if (!ignoreSizeReset) {
        ;[this._focusedDots, this._unfocusedDots].forEach((d) => {
          d.set_size(-1, -1)
          d.x_expand = d.y_expand = false

          d[sizeProp] = 1
          d[(isHorizontalDots ? 'y' : 'x') + '_expand'] = true
        })
      }
    }

    _settingsChangeRefresh() {
      if (this._isGroupApps) {
        this._updateWindows()
        this._resetDots()
        this._focusedDots.queue_repaint()
        this._unfocusedDots.queue_repaint()
      }

      this._displayProperIndicator()
    }

    _updateWindowTitleStyle() {
      if (this._windowTitle) {
        let useFixedWidth = SETTINGS.get_boolean('group-apps-use-fixed-width')
        let scaleFactor = Utils.getScaleFactor()
        let maxLabelWidth =
          SETTINGS.get_int('group-apps-label-max-width') * scaleFactor
        let variableWidth =
          !useFixedWidth ||
          this.dtpPanel.geom.vertical ||
          this.dtpPanel.taskbar.fullScrollView

        this._windowTitle[maxLabelWidth > 0 ? 'show' : 'hide']()
        this._windowTitle.set_width(
          variableWidth
            ? -1
            : maxLabelWidth + TITLE_RIGHT_PADDING * scaleFactor,
        )

        this._windowTitle.clutter_text.natural_width = useFixedWidth
          ? maxLabelWidth
          : 0
        this._windowTitle.clutter_text.natural_width_set = useFixedWidth

        this._windowTitle.set_style(
          useFixedWidth ? '' : 'max-width: ' + maxLabelWidth + 'px;'
        )
      }
    }

    _updateWindowTitle() {
      if (this._windowTitle.text != this.window.title) {
        this._windowTitle.text = (
          this.window.title ? this.window.title : this.app.get_name()
        )
          .replace(/\r?\n|\r/g, '')
          .trim()

        if (this._focusedDots) {
          this._displayProperIndicator()
        }
      }
    }

    _setIconStyle(isFocused) {
      let inlineStyle = 'margin: 0;'

      if (this._dotsContainer.get_style() != inlineStyle) {
        this._dotsContainer.set_style(inlineStyle)
      }
    }

    _checkIfFocusedApp() {
      return tracker.focus_app == this.app
    }

    _checkIfMonitorHasFocus() {
      return (
        global.display.focus_window &&
        (!SETTINGS.get_boolean('multi-monitors') || // only check same monitor index if multi window is enabled.
          !SETTINGS.get_boolean('isolate-monitors') ||
          global.display.focus_window.get_monitor() ===
            this.dtpPanel.monitor.index)
      )
    }

    _setAppIconPadding() {
      const padding = getIconPadding(this.dtpPanel)
      const margin = Taskbar.APPICON_MARGIN
      let vertical = this.dtpPanel.geom.vertical

      this.set_style(
        `padding: ${vertical ? margin : 0}px ${vertical ? 0 : margin}px;`,
      )
      this._iconContainer.set_style('padding: ' + padding + 'px;')
    }

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

      if (!this._menu) {
        this._menu = new TaskbarSecondaryMenu(this, this.dtpPanel.geom.position)
        this._menu.setApp(this.app)

        this._signalsHandler.add(
          [
            this._menu,
            'open-state-changed',
            (menu, isPoppedUp) => {
              if (!isPoppedUp) this._onMenuPoppedDown()
              else this._previewMenu.close(true)
            },
          ],
          [Main.overview, 'hiding', () => this._menu.close()],
        )

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

        Main.uiGroup.add_child(this._menu.actor)
        this._menuManager.addMenu(this._menu)
      }
      this._menu.updateQuitItems()

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

      this.set_hover(true)
      this._menu.open(BoxPointer.PopupAnimation.FULL)
      this._menuManager.ignoreRelease()
      this.emit('sync-tooltip')

      return false
    }

    _onFocusAppChanged() {
      this._displayProperIndicator()
    }

    _onOverviewWindowDragEnd() {
      this._timeoutsHandler.add([
        T4,
        0,
        () => {
          if (SETTINGS.get_boolean('isolate-workspaces')) this._updateWindows()

          this._displayProperIndicator()
        },
      ])
    }

    _onSwitchWorkspace() {
      if (this._isGroupApps) {
        this._timeoutsHandler.add([T5, 0, () => this._displayProperIndicator()])
      } else {
        this._displayProperIndicator()
      }
    }

    _displayProperIndicator() {
      let isFocused = this._isFocusedWindow()
      let position = PanelSettings.getPanelPosition(SETTINGS, this.dtpPanel.monitor.index)
      let isHorizontalDots =
        position == DOT_POSITION.TOP || position == DOT_POSITION.BOTTOM

      this._setIconStyle(isFocused)

      if (!this._isGroupApps) {
        if (
          this.window &&
          isFocused
        ) {
          let align =
            Clutter.ActorAlign[
              position == DOT_POSITION.TOP || position == DOT_POSITION.LEFT
                ? 'START'
                : 'END'
            ]

          this._focusedDots.set_size(0, 0)
          this._focusedDots[isHorizontalDots ? 'height' : 'width'] =
            this._getRunningIndicatorSize()

          this._focusedDots.y_align = this._focusedDots.x_align =
            Clutter.ActorAlign.FILL
          this._focusedDots[(isHorizontalDots ? 'y' : 'x') + '_align'] = align
          this._focusedDots.background_color =
            this._getRunningIndicatorColor(isFocused)
          this._focusedDots.show()
        } else if (this._focusedDots.visible) {
          this._focusedDots.hide()
        }
      } else {
        let sizeProp = isHorizontalDots ? 'width' : 'height'
        let newFocusedDotsSize = 0
        let newFocusedDotsOpacity = 0
        let newUnfocusedDotsSize = 0
        let newUnfocusedDotsOpacity = 0

        isFocused = this._checkIfFocusedApp() && this._checkIfMonitorHasFocus()

        this._timeoutsHandler.add([
          T6,
          0,
          () => {
            if (isFocused) this.add_style_class_name('focused')
            else this.remove_style_class_name('focused')
          },
        ])

        if (this._focusedIsWide) {
          newFocusedDotsSize =
            isFocused && this._nWindows > 0 ? this._containerSize : 0
          newFocusedDotsOpacity = 255
        } else {
          newFocusedDotsSize = this._containerSize
          newFocusedDotsOpacity = isFocused && this._nWindows > 0 ? 255 : 0
        }

        if (this._unfocusedIsWide) {
          newUnfocusedDotsSize =
            !isFocused && this._nWindows > 0 ? this._containerSize : 0
          newUnfocusedDotsOpacity = 255
        } else {
          newUnfocusedDotsSize = this._containerSize
          newUnfocusedDotsOpacity = !isFocused && this._nWindows > 0 ? 255 : 0
        }

        // Only animate if...
        // going from a wide style to a narrow style indicator or vice-versa
        // OR going from an open app to a closed app or vice versa
        let animate =
          this._focusedIsWide != this._unfocusedIsWide ||
            this._focusedDots[sizeProp] != newUnfocusedDotsSize ||
            this._unfocusedDots[sizeProp] != newFocusedDotsSize
        let duration = animate ? Taskbar.DASH_ANIMATION_TIME : 0.001

        this._animateDotDisplay(
          this._focusedDots,
          newFocusedDotsSize,
          this._unfocusedDots,
          newUnfocusedDotsOpacity,
          sizeProp,
          duration,
        )
        this._animateDotDisplay(
          this._unfocusedDots,
          newUnfocusedDotsSize,
          this._focusedDots,
          newFocusedDotsOpacity,
          sizeProp,
          duration,
        )
      }
    }

    _animateDotDisplay(
      dots,
      newSize,
      otherDots,
      newOtherOpacity,
      sizeProp,
      duration,
    ) {
      Utils.stopAnimations(dots)

      let tweenOpts = {
        time: duration,
        transition: 'easeInOutCubic',
        onComplete: () => {
          if (newOtherOpacity > 0) otherDots.opacity = newOtherOpacity
        },
      }

      if (newOtherOpacity == 0) otherDots.opacity = newOtherOpacity

      tweenOpts[sizeProp] = newSize

      Utils.animate(dots, tweenOpts)
    }

    _isFocusedWindow() {
      let focusedWindow = global.display.focus_window

      while (focusedWindow) {
        if (focusedWindow == this.window) {
          return true
        }

        focusedWindow = focusedWindow.get_transient_for()
      }

      return false
    }

    _isWideDotStyle(dotStyle) {
      return (
        dotStyle == DOT_STYLE.SEGMENTED ||
        dotStyle == DOT_STYLE.CILIORA ||
        dotStyle == DOT_STYLE.METRO ||
        dotStyle == DOT_STYLE.SOLID
      )
    }

    _isThemeProvidingIndicator() {
      // This is an attempt to determine if the theme is providing their own
      // running indicator by way of a border image on the icon, for example in
      // the theme Ciliora
      return (
        this.icon.get_stage() && this.icon.get_theme_node().get_border_image()
      )
    }

    activate(button, modifiers, handleAsGrouped) {
      let event = Clutter.get_current_event()

      modifiers = event ? event.get_state() : modifiers || 0

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

      let ctrlPressed = modifiers & Clutter.ModifierType.CONTROL_MASK

      if (ctrlPressed) {
        // CTRL-click or hotkey with ctrl
        return this._launchNewInstance(true)
      }

      // 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 doubleClick

      if (button && button == 2) {
        if (modifiers & Clutter.ModifierType.SHIFT_MASK)
          buttonAction = SETTINGS.get_string('shift-middle-click-action')
        else buttonAction = SETTINGS.get_string('middle-click-action')
      }
      // fixed issue #1676 by checking for button 0 or 1 to also handle touchscreen
      // input, probably not the proper fix as i'm not aware button 0 should exist
      // but from using this fix for months it seems to not create any issues
      else if (button === 0 || button === 1) {
        let now = global.get_current_time()

        doubleClick = now - this.lastClick < DOUBLE_CLICK_DELAY_MS
        this.lastClick = now

        if (modifiers & Clutter.ModifierType.SHIFT_MASK)
          buttonAction = SETTINGS.get_string('shift-click-action')
        else buttonAction = SETTINGS.get_string('click-action')
      }

      let closePreview = () =>
        this._previewMenu.close(true)
      let appCount = this.getAppIconInterestingWindows().length
      let previewedAppIcon = this._previewMenu.getCurrentAppIcon()

      if (this.window || buttonAction != 'TOGGLE-SHOWPREVIEW') closePreview()

      // We check if the app is running, and that the # of windows is > 0 in
      // case we use workspace isolation,
      let appIsRunning =
        this.app.state == Shell.AppState.RUNNING && appCount > 0

      // We customize the action only when the application is already running
      if (appIsRunning && !this.isLauncher) {
        if (this.window && !handleAsGrouped) {
          //ungrouped applications behaviors
          switch (buttonAction) {
            case 'LAUNCH':
              this._launchNewInstance()
              break

            case 'QUIT':
              this.window.delete(global.get_current_time())
              break

            default:
              if (
                !Main.overview._shown &&
                (buttonAction == 'MINIMIZE' ||
                  buttonAction == 'TOGGLE-SHOWPREVIEW' ||
                  buttonAction == 'TOGGLE-CYCLE' ||
                  buttonAction == 'TOGGLE-SPREAD' ||
                  buttonAction == 'CYCLE-MIN') &&
                (this._isFocusedWindow() ||
                  (buttonAction == 'MINIMIZE' &&
                    (button == 2 ||
                      modifiers & Clutter.ModifierType.SHIFT_MASK)))
              ) {
                this.window.minimize()
              } else {
                Main.activateWindow(this.window)
              }
          }
        } else {
          //grouped application behaviors
          let monitor = this.dtpPanel.monitor
          let appHasFocus =
            this._checkIfFocusedApp() && this._checkIfMonitorHasFocus()

          switch (buttonAction) {
            case 'RAISE':
              activateAllWindows(this.app, monitor)
              break

            case 'LAUNCH':
              this._launchNewInstance()
              break

            case 'MINIMIZE':
              // In overview just activate the app, unless the acion is explicitely
              // requested with a keyboard modifier
              if (!Main.overview._shown || modifiers) {
                // If we have button=2 or a modifier, allow minimization even if
                // the app is not focused
                if (
                  appHasFocus ||
                  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 all_windows = (button == 1 && !modifiers) || doubleClick
                  minimizeWindow(this.app, all_windows, monitor)
                } else activateAllWindows(this.app, monitor)
              } else this.app.activate()
              break

            case 'CYCLE':
              if (!Main.overview._shown) {
                if (appHasFocus)
                  cycleThroughWindows(this.app, false, false, monitor)
                else {
                  activateFirstWindow(this.app, monitor)
                }
              } else this.app.activate()
              break
            case 'CYCLE-MIN':
              if (!Main.overview._shown) {
                if (
                  appHasFocus ||
                  (recentlyClickedApp == this.app &&
                    recentlyClickedAppWindows[
                      recentlyClickedAppIndex % recentlyClickedAppWindows.length
                    ] == 'MINIMIZE')
                )
                  cycleThroughWindows(this.app, false, true, monitor)
                else {
                  activateFirstWindow(this.app, monitor)
                }
              } else this.app.activate()
              break
            case 'TOGGLE-SHOWPREVIEW':
              if (!Main.overview._shown) {
                if (appCount == 1) {
                  closePreview()

                  if (appHasFocus) minimizeWindow(this.app, false, monitor)
                  else activateFirstWindow(this.app, monitor)
                } else {
                  if (doubleClick) {
                    // minimize all windows if double clicked
                    closePreview()
                    minimizeWindow(this.app, true, monitor)
                  } else if (previewedAppIcon != this) {
                    this._previewMenu.open(this)
                  }

                  this.emit('sync-tooltip')
                }
              } else this.app.activate()
              break
            case 'TOGGLE-CYCLE':
              if (!Main.overview._shown) {
                if (appCount == 1) {
                  if (appHasFocus) minimizeWindow(this.app, false, monitor)
                  else activateFirstWindow(this.app, monitor)
                } else {
                  cycleThroughWindows(this.app, false, false, monitor)
                }
              } else this.app.activate()
              break
            case 'QUIT':
              closeAllWindows(this.app, monitor)
              break
            case 'TOGGLE-SPREAD':
              if (appCount == 1) {
                if (appHasFocus && !Main.overview._shown)
                  minimizeWindow(this.app, false, monitor)
                else activateFirstWindow(this.app, monitor)
              } else
                // return so the overview stays open if it already is
                return this.dtpPanel.panelManager.showFocusedAppInOverview(
                  this.app,
                )
          }
        }
      } else {
        this._launchNewInstance()
      }

      global.display.emit('grab-op-begin', null, null)
      Main.overview.hide()
    }

    _launchNewInstance(ctrlPressed) {
      if (
        (ctrlPressed || this.app.state == Shell.AppState.RUNNING) &&
        this.app.can_open_new_window()
      ) {
        this.animateLaunch()
        this.app.open_new_window(-1)
      } else {
        let windows = this.window ? [this.window] : this.app.get_windows()

        if (windows.length) {
          Main.activateWindow(windows[0])
        } else {
          this.animateLaunch()
          this.app.activate()
        }
      }
    }

    _updateWindows() {
      let windows = [this.window]

      if (!this.window) {
        windows = this.getAppIconInterestingWindows()

        this._nWindows = windows.length

        for (let i = 1; i <= MAX_INDICATORS; i++) {
          let className = 'running' + i
          if (i != this._nWindows) this.remove_style_class_name(className)
          else this.add_style_class_name(className)
        }
      }

      this._previewMenu.update(this, windows)
    }

    _getRunningIndicatorCount() {
      return Math.min(this._nWindows, MAX_INDICATORS)
    }

    _getRunningIndicatorSize() {
      return DOT_SIZE * Utils.getScaleFactor()
    }

    _getRunningIndicatorColor(isFocused) {
      let color
      const fallbackColor = new Utils.ColorUtils.Color({
        red: 82,
        green: 148,
        blue: 226,
        alpha: 255,
      })

      // Re-use the style - background color, and border width and color -
      // of the default dot
      let themeNode = this._dot.get_theme_node()
      color = themeNode.get_background_color()

      // theme didn't provide one, use a default
      if (color.alpha == 0) color = fallbackColor

      return color
    }

    _drawRunningIndicator(area, type, isFocused) {
      let n = this._getRunningIndicatorCount()

      if (!n) {
        return
      }

      let position = PanelSettings.getPanelPosition(SETTINGS, this.dtpPanel.monitor.index)
      let isHorizontalDots =
        position == DOT_POSITION.TOP || position == DOT_POSITION.BOTTOM
      let bodyColor = this._getRunningIndicatorColor(isFocused)
      let [areaWidth, areaHeight] = area.get_surface_size()
      let cr = area.get_context()
      let size = this._getRunningIndicatorSize()

      let areaSize = areaWidth
      let startX = 0
      let startY = 0

      if (isHorizontalDots) {
        if (position == DOT_POSITION.BOTTOM) {
          startY = areaHeight - size
        }
      } else {
        areaSize = areaHeight

        if (position == DOT_POSITION.RIGHT) {
          startX = areaWidth - size
        }
      }

      if (type == DOT_STYLE.SOLID || type == DOT_STYLE.METRO) {
        if (type == DOT_STYLE.SOLID || n <= 1) {
          cr.translate(startX, startY)
          cr.setSourceColor(bodyColor)
          cr.newSubPath()
          cr.rectangle.apply(
            cr,
            [0, 0].concat(
              isHorizontalDots ? [areaSize, size] : [size, areaSize],
            ),
          )
          cr.fill()
        } else {
          let blackenedLength = (1 / 48) * areaSize // need to scale with the SVG for the stacked highlight
          let darkenedLength = isFocused
            ? (2 / 48) * areaSize
            : (10 / 48) * areaSize
          let blackenedColor = new Utils.ColorUtils.Color({
            red: bodyColor.red * 0.3,
            green: bodyColor.green * 0.3,
            blue: bodyColor.blue * 0.3,
            alpha: bodyColor.alpha,
          })
          let darkenedColor = new Utils.ColorUtils.Color({
            red: bodyColor.red * 0.7,
            green: bodyColor.green * 0.7,
            blue: bodyColor.blue * 0.7,
            alpha: bodyColor.alpha,
          })
          let solidDarkLength = areaSize - darkenedLength
          let solidLength = solidDarkLength - blackenedLength

          cr.translate(startX, startY)

          cr.setSourceColor(bodyColor)
          cr.newSubPath()
          cr.rectangle.apply(
            cr,
            [0, 0].concat(
              isHorizontalDots ? [solidLength, size] : [size, solidLength],
            ),
          )
          cr.fill()
          cr.setSourceColor(blackenedColor)
          cr.newSubPath()
          cr.rectangle.apply(
            cr,
            isHorizontalDots
              ? [solidLength, 0, 1, size]
              : [0, solidLength, size, 1],
          )
          cr.fill()
          cr.setSourceColor(darkenedColor)
          cr.newSubPath()
          cr.rectangle.apply(
            cr,
            isHorizontalDots
              ? [solidDarkLength, 0, darkenedLength, size]
              : [0, solidDarkLength, size, darkenedLength],
          )
          cr.fill()
        }
      } else {
        let spacing = Math.ceil(areaSize / 18) // separation between the indicators
        let length
        let radius
        let dist
        let indicatorSize
        let translate
        let preDraw = () => {}
        let draw
        let drawDash = (i, dashLength) => {
          dist = i * dashLength + i * spacing
          cr.rectangle.apply(
            cr,
            isHorizontalDots
              ? [dist, 0, dashLength, size]
              : [0, dist, size, dashLength],
          )
        }

        switch (type) {
          // Using the code from Ciliora Round style in pull request https://github.com/home-sweet-gnome/dash-to-panel/pull/1720 
          case DOT_STYLE.CILIORA:
            spacing = size
            radius = size / 2
            length = areaSize - size * (n - 1) - spacing * (n - 1)
            translate = () => cr.translate(startX, startY)
            preDraw = () => {
              cr.newSubPath()
              cr.arc.apply(
                cr,
                (isHorizontalDots ? [radius, radius] : [radius, radius]).concat([radius, 0, 2 * Math.PI])
              )
              cr.arc.apply(
                cr,
                (isHorizontalDots ? [length - radius, radius] : [radius, length - radius]).concat([radius, 0, 2 * Math.PI])
              )
              cr.rectangle.apply(
                cr,
                (isHorizontalDots ? [radius, 0, length - size, size] : [0, radius, size, length - size])
              )
            }
            draw = (i) => {
              dist = length + i * spacing + (i - 1) * size + radius
              cr.arc.apply(
                cr,
                (isHorizontalDots ? [dist, radius] : [radius, dist]).concat([radius, 0, 2 * Math.PI]),
              )
            }
            break
          case DOT_STYLE.DOTS: {
            radius = size / 2

            translate = () => {
              indicatorSize = Math.floor(
                (areaSize - n * size - (n - 1) * spacing) / 2,
              )
              cr.translate.apply(
                cr,
                isHorizontalDots
                  ? [indicatorSize, startY]
                  : [startX, indicatorSize],
              )
            }
            draw = (i) => {
              dist = (2 * i + 1) * radius + i * spacing
              cr.arc.apply(
                cr,
                (isHorizontalDots ? [dist, radius] : [radius, dist]).concat([
                  radius,
                  0,
                  2 * Math.PI,
                ]),
              )
            }
            break
          }
          case DOT_STYLE.SQUARES:
            translate = () => {
              indicatorSize = Math.floor(
                (areaSize - n * size - (n - 1) * spacing) / 2,
              )
              cr.translate.apply(
                cr,
                isHorizontalDots
                  ? [indicatorSize, startY]
                  : [startX, indicatorSize],
              )
            }
            draw = (i) => {
              dist = i * size + i * spacing
              cr.rectangle.apply(
                cr,
                (isHorizontalDots ? [dist, 0] : [0, dist]).concat([size, size]),
              )
            }
            break
          case DOT_STYLE.DASHES:
            length = Math.floor(areaSize / 4) - spacing
            translate = () => {
              indicatorSize = Math.floor(
                (areaSize - n * length - (n - 1) * spacing) / 2,
              )
              cr.translate.apply(
                cr,
                isHorizontalDots
                  ? [indicatorSize, startY]
                  : [startX, indicatorSize],
              )
            }
            draw = (i) => drawDash(i, length)
            break
          case DOT_STYLE.SEGMENTED:
            length = Math.ceil((areaSize - (n - 1) * spacing) / n)
            translate = () => cr.translate(startX, startY)
            draw = (i) => drawDash(i, length)
            break
        }

        translate()

        cr.setSourceColor(bodyColor)
        preDraw()
        for (let i = 0; i < n; i++) {
          cr.newSubPath()
          draw(i)
        }
        cr.fill()
      }

      cr.$dispose()
    }

    _handleNotifications() {
      if (!this._nWindows && !this.window) return

      let monitor = this.dtpPanel.panelManager.notificationsMonitor
      let state = monitor.getState(this.app)
      let count = 0

      if (!state) return

      if (SETTINGS.get_boolean('progress-show-count')) {
        this.iconAnimator[`${state.urgent ? 'add' : 'remove'}Animation`](
          this.icon._iconBin,
          'dance',
        )

        if (state.total) {
          count = state.total > 9 ? '9+' : state.total
          this.dtpPanel.intellihide.revealAndHold(Hold.NOTIFY)
        } else this.dtpPanel.intellihide.release(Hold.NOTIFY)
      }

      this._notificationsCount = count

      this._maybeUpdateNumberOverlay()
    }

    _maybeUpdateNumberOverlay() {
      let visible = this._numberOverlayBin.visible
      let shouldBeVisible =
        (this._hotkeysOverlayActiveMode &&
          this._numberHotkeysOverlayLabel > -1) ||
        this._notificationsCount

      let showNotifications =
        this._notificationsCount &&
        this._hotkeysOverlayActiveMode !== 'TEMPORARILY'
      let label = showNotifications
        ? this._notificationsCount
        : this._numberHotkeysOverlayLabel

      this._numberOverlayLabel[
        `${showNotifications ? 'add' : 'remove'}_style_class_name`
      ]('notification-badge')

      if (showNotifications) {
        this._numberOverlayLabel.set_x_align(Clutter.ActorAlign.END)
        this._numberOverlayLabel.set_y_align(Clutter.ActorAlign.START)
        this._numberOverlayLabel.set_x_expand(true)
        this._numberOverlayLabel.set_y_expand(true)
      } else {
        this._numberOverlayLabel.set_x_align(Clutter.ActorAlign.START)
        this._numberOverlayLabel.set_y_align(Clutter.ActorAlign.START)
        this._numberOverlayLabel.set_x_expand(false)
        this._numberOverlayLabel.set_y_expand(false)
      }

      if (shouldBeVisible && label !== this._numberOverlayLabel.get_text()) {
        this._numberOverlayLabel.set_text(label.toString())
        this._updateNumberOverlay()
      }

      if (visible && !shouldBeVisible) this._numberOverlayBin.hide()
      else if (!visible && shouldBeVisible) this._numberOverlayBin.show()
    }

    _numberOverlay() {
      // Add label for a numeric visual aid (hotkeys or notification)
      this._numberOverlayLabel = new St.Label({ style_class: 'badge' })
      this._numberOverlayBin = new St.Bin({
        child: this._numberOverlayLabel,
        y: 2,
      })
      this._numberOverlayLabel.add_style_class_name('number-overlay')
      this._numberHotkeysOverlayLabel = -1
      this._numberOverlayBin.hide()

      this._dtpIconContainer.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.
      // 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 panelSize = this.dtpPanel.geom.iconSize
      let minFontSize = panelSize >= 32 ? 12 : 10
      let fontSize = Math.round(
        Math.max(minFontSize, 0.2 * panelSize) / Utils.getScaleFactor(),
      )
      let size = Math.round(fontSize * 1.3)
      let style = `
        font-size: ${fontSize}px;
        height: ${size}px;
      `
      this._numberOverlayLabel.set_style(style)
    }

    setHotkeysNumberOverlayLabel(number) {
      this._numberHotkeysOverlayLabel = number
    }

    toggleHotkeysNumberOverlay(activateMode) {
      this._hotkeysOverlayActiveMode =
        this._numberHotkeysOverlayLabel > -1 && activateMode

      this._maybeUpdateNumberOverlay()
    }

    handleDragOver(source) {
      if (source == Main.xdndHandler) {
        this._previewMenu.close(true)

        if (!this._nWindows && !this.window)
          return DND.DragMotionResult.MOVE_DROP

        if (this._nWindows == 1 || this.window) {
          this.window
            ? Main.activateWindow(this.window)
            : activateFirstWindow(this.app, this.monitor)
        } else
          this.dtpPanel.panelManager.showFocusedAppInOverview(this.app, true)

        return DND.DragMotionResult.MOVE_DROP
      }

      return DND.DragMotionResult.CONTINUE
    }

    getAppIconInterestingWindows(isolateMonitors) {
      return getInterestingWindows(
        this.app,
        this.dtpPanel.monitor,
        isolateMonitors,
      )
    }
  },
)
TaskbarAppIcon.prototype.scaleAndFade =
  TaskbarAppIcon.prototype.undoScaleAndFade = () => {}

export function minimizeWindow(app, param, monitor) {
  // Param true make all app windows minimize
  let windows = getInterestingWindows(app, monitor)
  let current_workspace =
    Utils.DisplayWrapper.getWorkspaceManager().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.
 */
export function activateAllWindows(app, monitor) {
  // First activate first window so workspace is switched if needed,
  // then activate all other app windows in the current workspace.
  let windows = getInterestingWindows(app, monitor)
  let w = windows[0]
  Main.activateWindow(w)
  let activeWorkspace =
    Utils.DisplayWrapper.getWorkspaceManager().get_active_workspace_index()

  if (windows.length <= 0) return

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

export function activateFirstWindow(app, monitor) {
  let windows = getInterestingWindows(app, monitor)
  Main.activateWindow(windows[0])
}

export function cycleThroughWindows(app, reversed, shouldMinimize, monitor) {
  // 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 = getInterestingWindows(app, monitor)

  if (shouldMinimize) app_windows.push('MINIMIZE')

  if (recentlyClickedAppLoopId > 0) GLib.Source.remove(recentlyClickedAppLoopId)

  recentlyClickedAppLoopId = GLib.timeout_add(
    GLib.PRIORITY_DEFAULT,
    MEMORY_TIME,
    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.
  if (
    !recentlyClickedApp ||
    recentlyClickedApp.get_id() != app.get_id() ||
    recentlyClickedAppWindows.length != app_windows.length ||
    recentlyClickedAppMonitorIndex != monitor.index
  ) {
    recentlyClickedApp = app
    recentlyClickedAppWindows = app_windows
    recentlyClickedAppIndex = 0
    recentlyClickedAppMonitorIndex = monitor.index
  }

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

  if (recentlyClickedAppWindows[index] === 'MINIMIZE')
    minimizeWindow(app, true, monitor)
  else Main.activateWindow(recentlyClickedAppWindows[index])
}

export function resetRecentlyClickedApp() {
  if (recentlyClickedAppLoopId > 0) GLib.Source.remove(recentlyClickedAppLoopId)

  recentlyClickedAppLoopId = 0
  recentlyClickedApp = null
  recentlyClickedAppWindows = null
  recentlyClickedAppIndex = 0
  recentlyClickedAppMonitorIndex = null

  return GLib.SOURCE_REMOVE
}

export function closeAllWindows(app, monitor) {
  let windows = getInterestingWindows(app, monitor)
  for (let i = 0; i < windows.length; i++)
    windows[i].delete(global.get_current_time())
}

// Filter out unnecessary windows, for instance
// nautilus desktop window.
export function getInterestingWindows(app, monitor, isolateMonitors) {
  let windows = (app ? app.get_windows() : Utils.getAllMetaWindows()).filter(
    (w) => !w.skip_taskbar,
  )

  // When using workspace or monitor isolation, we filter out windows
  // that are not in the current workspace or on the same monitor as the appicon
  if (SETTINGS.get_boolean('isolate-workspaces'))
    windows = windows.filter(function (w) {
      return (
        w.get_workspace() && w.get_workspace() == Utils.getCurrentWorkspace()
      )
    })

  if (
    monitor &&
    (isolateMonitors || SETTINGS.get_boolean('isolate-monitors'))
  ) {
    windows = windows.filter(function (w) {
      return w.get_monitor() == monitor.index
    })
  }

  return windows
}

export function cssHexTocssRgba(cssHex, opacity) {
  let bigint = parseInt(cssHex.slice(1), 16)
  let r = (bigint >> 16) & 255
  let g = (bigint >> 8) & 255
  let b = bigint & 255

  return 'rgba(' + [r, g, b].join(',') + ',' + opacity + ')'
}

export function getIconPadding(dtpPanel) {
  let panelSize = dtpPanel.geom.innerSize
  let padding = Taskbar.APPICON_PADDING
  let availSize = panelSize - Taskbar.MIN_ICON_SIZE - (panelSize % 2)

  if (padding * 2 > availSize) {
    padding = availSize * 0.5
  }

  return padding
}

/**
 * Extend AppMenu (AppIconMenu for pre gnome 41)
 *
 * - hide 'App Details' according to setting
 * - show windows header only if show-window-previews is disabled
 * - Add close windows option based on quitfromdash extension
 *   (https://github.com/deuill/shell-extension-quitfromdash)
 */

export class TaskbarSecondaryMenu extends AppMenu.AppMenu {
  constructor(source, side) {
    super(source, side)
    // constructor parameter does nos work for some reason
    this._enableFavorites = true
    this._showSingleWindows = true

    if (source.window)
      this._quitAllItem = this.addAction('QuitAll', () =>
        this._quitFromTaskbar(true),
      )

    // replace quit item
    delete this._quitItem
    this._quitItem = this.addAction(_('Quit'), () => this._quitFromTaskbar())
  }

  updateQuitItems() {
    let ungrouped = !!this.sourceActor.window
    let quitText = _('Quit')
    let count = getInterestingWindows(
      this._app,
      this.sourceActor.dtpPanel.monitor,
    ).length
    let quitMultipleText = ngettext(
      'Quit %d Window',
      'Quit %d Windows',
      count,
    ).format(count)

    if (ungrouped) {
      this._quitAllItem.label.set_text(quitMultipleText)
      this._quitAllItem.visible = count > 1
    } else quitText = quitMultipleText

    this._quitItem.visible = count > 0
    this._quitItem.label.set_text(quitText)
  }

  _quitFromTaskbar(all) {
    let time = global.get_current_time()
    let windows =
      !all && this.sourceActor.window // ungrouped applications
        ? [this.sourceActor.window]
        : getInterestingWindows(this._app, this.sourceActor.dtpPanel.monitor)

    if (windows.length == this._app.get_windows().length)
      this._app.request_quit()

    GLib.idle_add(GLib.PRIORITY_DEFAULT_IDLE, () => {
      windows.forEach((w) => !!w.get_compositor_private() && w.delete(time++))

      return GLib.SOURCE_REMOVE
    })
  }
}

/**
 * This function is used for extendDashItemContainer
 */
export function ItemShowLabel() {
  if (!this._labelText) 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 position = this._dtpPanel.geom.position
  let labelOffset = node.get_length('-x-offset')

  let xOffset = Math.floor((itemWidth - labelWidth) / 2)
  let x = stageX + xOffset
  let y = stageY + (itemHeight - labelHeight) * 0.5

  switch (position) {
    case St.Side.TOP:
      y = stageY + labelOffset + itemHeight
      break
    case St.Side.BOTTOM:
      y = stageY - labelHeight - labelOffset
      break
    case St.Side.LEFT:
      x = stageX + labelOffset + itemWidth
      break
    case St.Side.RIGHT:
      x = stageX - labelWidth - labelOffset
      break
  }

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

  // Leave a few pixel gap
  let gap = LABEL_GAP
  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.set_position(Math.round(x), Math.round(y))

  let duration = Dash.DASH_ITEM_LABEL_SHOW_TIME

  if (duration > 1) {
    duration /= 1000
  }

  Utils.animate(this.label, {
    opacity: 255,
    time: duration,
    transition: 'easeOutQuad',
  })
}

/**
 * A wrapper class around the ShowAppsIcon class.
 *
 * - Pass settings to the constructor
 * - 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)
 *
 * I can't subclass the original object because of this: https://bugzilla.gnome.org/show_bug.cgi?id=688973.
 * thus use this pattern where the real showAppsIcon object is encaptulated, and a reference to it will be properly wired upon
 * use of this class in place of the original showAppsButton.
 *
 */
export const ShowAppsIconWrapper = class extends EventEmitter {
  constructor(dtpPanel) {
    super()

    this.realShowAppsIcon = new Dash.ShowAppsIcon()

    /* the variable equivalent to toggleButton has a different name in the appIcon class
        (actor): duplicate reference to easily reuse appIcon methods */
    this.actor = this.realShowAppsIcon.toggleButton
    this.realShowAppsIcon.show(false)

    // Re-use appIcon methods
    this._removeMenuTimeout = AppDisplay.AppIcon.prototype._removeMenuTimeout
    this._setPopupTimeout = AppDisplay.AppIcon.prototype._setPopupTimeout
    this._onKeyboardPopupMenu =
      AppDisplay.AppIcon.prototype._onKeyboardPopupMenu

    // No action on clicked (showing of the appsview is controlled elsewhere)
    this._onClicked = () => this._removeMenuTimeout()

    this.actor.connect('leave-event', this._onLeaveEvent.bind(this))
    this.actor.connect('button-press-event', this._onButtonPress.bind(this))
    this.actor.connect('touch-event', this._onTouchEvent.bind(this))
    this.actor.connect('clicked', this._onClicked.bind(this))
    this.actor.connect('popup-menu', this._onKeyboardPopupMenu.bind(this))

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

    this.realShowAppsIcon._dtpPanel = dtpPanel
    Taskbar.extendDashItemContainer(this.realShowAppsIcon)

    this.realShowAppsIcon.icon.createIcon = function (size) {
      this._iconActor = new St.Icon({
        icon_name: 'view-app-grid-symbolic',
        icon_size: size,
        style_class: 'show-apps-icon',
        track_hover: true,
      })

      return this._iconActor
    }

    this.setShowAppsPadding()
  }

  _onButtonPress(_actor, event) {
    let button = event.get_button()
    if (button == 1) {
      this._setPopupTimeout()
    } else if (button == 3) {
      this.popupMenu()
      return Clutter.EVENT_STOP
    }
    return Clutter.EVENT_PROPAGATE
  }

  _onLeaveEvent() {
    this.actor.fake_release()
    this._removeMenuTimeout()
  }

  _onTouchEvent(actor, event) {
    if (event.type() == Clutter.EventType.TOUCH_BEGIN) this._setPopupTimeout()

    return Clutter.EVENT_PROPAGATE
  }

  _onMenuPoppedDown() {
    this._menu.sourceActor = this.actor
    this.actor.sync_hover()
    this.emit('menu-state-changed', false)
  }

  setShowAppsPadding() {
    let padding = getIconPadding(this.realShowAppsIcon._dtpPanel)

    this.actor.set_style(
      'padding:' + padding + 'px;',
    )
  }

  createMenu() {
    if (!this._menu) {
      this._menu = new MyShowAppsIconMenu(
        this.realShowAppsIcon,
        this.realShowAppsIcon._dtpPanel,
      )
      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', () => {
        Main.overview.disconnect(id)
      })

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

      Main.uiGroup.add_child(this._menu.actor)
      this._menuManager.addMenu(this._menu)
    }
  }

  popupMenu(sourceActor = null) {
    this._removeMenuTimeout()
    this.actor.fake_release()
    this.createMenu()

    this._menu.updateItems(
      sourceActor == null ? this.realShowAppsIcon : sourceActor,
    )

    this.actor.set_hover(true)
    this._menu.open(BoxPointer.PopupAnimation.FULL)
    this._menuManager.ignoreRelease()
    this.emit('sync-tooltip')

    return false
  }

  shouldShowTooltip() {
    return (
      SETTINGS.get_boolean('show-tooltip') &&
      this.actor.hover &&
      (!this._menu || !this._menu.isOpen)
    )
  }

  destroy() {
    this.realShowAppsIcon.destroy()
  }
}

/**
 * A menu for the showAppsIcon
 */
export const MyShowAppsIconMenu = class extends PopupMenu.PopupMenu {
  constructor(actor, dtpPanel) {
    super(actor, 0, dtpPanel.geom.position)

    this._dtpPanel = dtpPanel

    this.updateItems(actor)
  }

  updateItems(sourceActor) {
    this.sourceActor = sourceActor

    this.removeAll()

    this._appendItem({
      title: _('System Monitor'),
      cmd: ['gnome-system-monitor'],
    })

    this._appendItem({
      title: _('Files'),
      cmd: ['nautilus'],
    })

    this._appendItem({
      title: _('Settings'),
      cmd: ['gnome-control-center'],
    })

    this._appendItem({
      title: _('Zorin Appearance'),
      cmd: ['zorin-appearance'],
    })

    this._appendList(
      SETTINGS.get_strv('panel-context-menu-commands'),
      SETTINGS.get_strv('panel-context-menu-titles'),
    )

    this._appendSeparator()

    let lockTaskbarMenuItem = this._appendMenuItem(
      SETTINGS.get_boolean('taskbar-locked')
        ? _('Unlock taskbar')
        : _('Lock taskbar'),
    )
    lockTaskbarMenuItem.connect('activate', () => {
      SETTINGS.set_boolean(
        'taskbar-locked',
        !SETTINGS.get_boolean('taskbar-locked'),
      )
    })

    let settingsMenuItem = this._appendMenuItem(_('Taskbar Settings'))
    settingsMenuItem.connect('activate', () => DTP_EXTENSION.openPreferences())

    if (this.sourceActor == Main.layoutManager.dummyCursor) {
      this._appendSeparator()
      let item = this._appendMenuItem(
        this._dtpPanel._restoreWindowList
          ? _('Restore Windows')
          : _('Show Desktop'),
      )
      item.connect(
        'activate',
        this._dtpPanel._onShowDesktopButtonPress.bind(this._dtpPanel),
      )
    }
  }

  // Only add menu entries for commands that exist in path
  _appendItem(info) {
    if (GLib.find_program_in_path(info.cmd[0])) {
      let item = this._appendMenuItem(_(info.title))

      item.connect('activate', function () {
        Util.spawn(info.cmd)
      })
      return item
    }

    return null
  }

  _appendList(commandList, titleList) {
    if (commandList.length != titleList.length) {
      return
    }

    for (let entry = 0; entry < commandList.length; entry++) {
      this._appendItem({
        title: titleList[entry],
        cmd: commandList[entry].split(' '),
      })
    }
  }

  _appendSeparator() {
    let separator = new PopupMenu.PopupSeparatorMenuItem()
    this.addMenuItem(separator)
  }

  _appendMenuItem(labelText) {
    // FIXME: app-well-menu-item style
    let item = new PopupMenu.PopupMenuItem(labelText)
    this.addMenuItem(item)
    return item
  }
}

export const getIconContainerStyle = function (isVertical) {
  let style = 'padding: '

  if (SETTINGS.get_boolean('group-apps')) {
    style += isVertical ? '0;' : '0 ' + DEFAULT_PADDING_SIZE + 'px;'
  } else {
    style += (isVertical ? '' : '0 ') + DEFAULT_PADDING_SIZE + 'px;'
  }

  return style
}