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+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported WorkspaceThumbnail, ThumbnailsBox */
+
+const { Clutter, Gio, GLib, GObject, Graphene, Meta, Shell, St } = imports.gi;
+
+const DND = imports.ui.dnd;
+const Main = imports.ui.main;
+const { TransientSignalHolder } = imports.misc.signalTracker;
+const Util = imports.misc.util;
+const Workspace = imports.ui.workspace;
+
+const NUM_WORKSPACES_THRESHOLD = 2;
+
+// The maximum size of a thumbnail is 5% the width and height of the screen
+var MAX_THUMBNAIL_SCALE = 0.05;
+
+var RESCALE_ANIMATION_TIME = 200;
+var SLIDE_ANIMATION_TIME = 200;
+
+// When we create workspaces by dragging, we add a "cut" into the top and
+// bottom of each workspace so that the user doesn't have to hit the
+// placeholder exactly.
+var WORKSPACE_CUT_SIZE = 10;
+
+var WORKSPACE_KEEP_ALIVE_TIME = 100;
+
+var MUTTER_SCHEMA = 'org.gnome.mutter';
+
+/* A layout manager that requests size only for primary_actor, but then allocates
+ all using a fixed layout */
+var PrimaryActorLayout = GObject.registerClass(
+class PrimaryActorLayout extends Clutter.FixedLayout {
+ _init(primaryActor) {
+ super._init();
+
+ this.primaryActor = primaryActor;
+ }
+
+ vfunc_get_preferred_width(container, forHeight) {
+ return this.primaryActor.get_preferred_width(forHeight);
+ }
+
+ vfunc_get_preferred_height(container, forWidth) {
+ return this.primaryActor.get_preferred_height(forWidth);
+ }
+});
+
+var WindowClone = GObject.registerClass({
+ Signals: {
+ 'drag-begin': {},
+ 'drag-cancelled': {},
+ 'drag-end': {},
+ 'selected': { param_types: [GObject.TYPE_UINT] },
+ },
+}, class WindowClone extends Clutter.Actor {
+ _init(realWindow) {
+ let clone = new Clutter.Clone({ source: realWindow });
+ super._init({
+ layout_manager: new PrimaryActorLayout(clone),
+ reactive: true,
+ });
+ this._delegate = this;
+
+ this.add_child(clone);
+ this.realWindow = realWindow;
+ this.metaWindow = realWindow.meta_window;
+
+ this.realWindow.connectObject(
+ 'notify::position', this._onPositionChanged.bind(this),
+ 'destroy', () => {
+ // First destroy the clone and then destroy everything
+ // This will ensure that we never see it in the _disconnectSignals loop
+ clone.destroy();
+ this.destroy();
+ }, this);
+ this._onPositionChanged();
+
+ this.connect('destroy', this._onDestroy.bind(this));
+
+ this._draggable = DND.makeDraggable(this, {
+ restoreOnSuccess: true,
+ dragActorMaxSize: Workspace.WINDOW_DND_SIZE,
+ dragActorOpacity: Workspace.DRAGGING_WINDOW_OPACITY,
+ });
+ this._draggable.connect('drag-begin', this._onDragBegin.bind(this));
+ this._draggable.connect('drag-cancelled', this._onDragCancelled.bind(this));
+ this._draggable.connect('drag-end', this._onDragEnd.bind(this));
+ this.inDrag = false;
+
+ let iter = win => {
+ let actor = win.get_compositor_private();
+
+ if (!actor)
+ return false;
+ if (!win.is_attached_dialog())
+ return false;
+
+ this._doAddAttachedDialog(win, actor);
+ win.foreach_transient(iter);
+
+ return true;
+ };
+ this.metaWindow.foreach_transient(iter);
+ }
+
+ // Find the actor just below us, respecting reparenting done
+ // by DND code
+ getActualStackAbove() {
+ if (this._stackAbove == null)
+ return null;
+
+ if (this.inDrag) {
+ if (this._stackAbove._delegate)
+ return this._stackAbove._delegate.getActualStackAbove();
+ else
+ return null;
+ } else {
+ return this._stackAbove;
+ }
+ }
+
+ setStackAbove(actor) {
+ this._stackAbove = actor;
+
+ // Don't apply the new stacking now, it will be applied
+ // when dragging ends and window are stacked again
+ if (actor.inDrag)
+ return;
+
+ let parent = this.get_parent();
+ let actualAbove = this.getActualStackAbove();
+ if (actualAbove == null)
+ parent.set_child_below_sibling(this, null);
+ else
+ parent.set_child_above_sibling(this, actualAbove);
+ }
+
+ addAttachedDialog(win) {
+ this._doAddAttachedDialog(win, win.get_compositor_private());
+ }
+
+ _doAddAttachedDialog(metaDialog, realDialog) {
+ let clone = new Clutter.Clone({ source: realDialog });
+ this._updateDialogPosition(realDialog, clone);
+
+ realDialog.connectObject(
+ 'notify::position', dialog => this._updateDialogPosition(dialog, clone),
+ 'destroy', () => clone.destroy(), this);
+ this.add_child(clone);
+ }
+
+ _updateDialogPosition(realDialog, cloneDialog) {
+ let metaDialog = realDialog.meta_window;
+ let dialogRect = metaDialog.get_frame_rect();
+ let rect = this.metaWindow.get_frame_rect();
+
+ cloneDialog.set_position(dialogRect.x - rect.x, dialogRect.y - rect.y);
+ }
+
+ _onPositionChanged() {
+ this.set_position(this.realWindow.x, this.realWindow.y);
+ }
+
+ _onDestroy() {
+ this._delegate = null;
+
+ if (this.inDrag) {
+ this.emit('drag-end');
+ this.inDrag = false;
+ }
+ }
+
+ vfunc_button_press_event() {
+ return Clutter.EVENT_STOP;
+ }
+
+ vfunc_button_release_event(buttonEvent) {
+ this.emit('selected', buttonEvent.time);
+
+ return Clutter.EVENT_STOP;
+ }
+
+ vfunc_touch_event(touchEvent) {
+ if (touchEvent.type != Clutter.EventType.TOUCH_END ||
+ !global.display.is_pointer_emulating_sequence(touchEvent.sequence))
+ return Clutter.EVENT_PROPAGATE;
+
+ this.emit('selected', touchEvent.time);
+ return Clutter.EVENT_STOP;
+ }
+
+ _onDragBegin(_draggable, _time) {
+ this.inDrag = true;
+ this.emit('drag-begin');
+ }
+
+ _onDragCancelled(_draggable, _time) {
+ this.emit('drag-cancelled');
+ }
+
+ _onDragEnd(_draggable, _time, _snapback) {
+ this.inDrag = false;
+
+ // We may not have a parent if DnD completed successfully, in
+ // which case our clone will shortly be destroyed and replaced
+ // with a new one on the target workspace.
+ let parent = this.get_parent();
+ if (parent !== null) {
+ if (this._stackAbove == null)
+ parent.set_child_below_sibling(this, null);
+ else
+ parent.set_child_above_sibling(this, this._stackAbove);
+ }
+
+
+ this.emit('drag-end');
+ }
+});
+
+
+var ThumbnailState = {
+ NEW: 0,
+ EXPANDING: 1,
+ EXPANDED: 2,
+ ANIMATING_IN: 3,
+ NORMAL: 4,
+ REMOVING: 5,
+ ANIMATING_OUT: 6,
+ ANIMATED_OUT: 7,
+ COLLAPSING: 8,
+ DESTROYED: 9,
+};
+
+/**
+ * @metaWorkspace: a #Meta.Workspace
+ */
+var WorkspaceThumbnail = GObject.registerClass({
+ Properties: {
+ 'collapse-fraction': GObject.ParamSpec.double(
+ 'collapse-fraction', 'collapse-fraction', 'collapse-fraction',
+ GObject.ParamFlags.READWRITE,
+ 0, 1, 0),
+ 'slide-position': GObject.ParamSpec.double(
+ 'slide-position', 'slide-position', 'slide-position',
+ GObject.ParamFlags.READWRITE,
+ 0, 1, 0),
+ },
+}, class WorkspaceThumbnail extends St.Widget {
+ _init(metaWorkspace, monitorIndex) {
+ super._init({
+ clip_to_allocation: true,
+ style_class: 'workspace-thumbnail',
+ pivot_point: new Graphene.Point({ x: 0.5, y: 0.5 }),
+ });
+ this._delegate = this;
+
+ this.metaWorkspace = metaWorkspace;
+ this.monitorIndex = monitorIndex;
+
+ this._removed = false;
+
+ this._viewport = new Clutter.Actor();
+ this.add_child(this._viewport);
+
+ this._contents = new Clutter.Actor();
+ this._viewport.add_child(this._contents);
+
+ this.connect('destroy', this._onDestroy.bind(this));
+
+ let workArea = Main.layoutManager.getWorkAreaForMonitor(this.monitorIndex);
+ this.setPorthole(workArea.x, workArea.y, workArea.width, workArea.height);
+
+ let windows = global.get_window_actors().filter(actor => {
+ let win = actor.meta_window;
+ return win.located_on_workspace(metaWorkspace);
+ });
+
+ // Create clones for windows that should be visible in the Overview
+ this._windows = [];
+ this._allWindows = [];
+ for (let i = 0; i < windows.length; i++) {
+ windows[i].meta_window.connectObject('notify::minimized',
+ this._updateMinimized.bind(this), this);
+ this._allWindows.push(windows[i].meta_window);
+
+ if (this._isMyWindow(windows[i]) && this._isOverviewWindow(windows[i]))
+ this._addWindowClone(windows[i]);
+ }
+
+ // Track window changes
+ this.metaWorkspace.connectObject(
+ 'window-added', this._windowAdded.bind(this),
+ 'window-removed', this._windowRemoved.bind(this), this);
+ global.display.connectObject(
+ 'window-entered-monitor', this._windowEnteredMonitor.bind(this),
+ 'window-left-monitor', this._windowLeftMonitor.bind(this), this);
+
+ this.state = ThumbnailState.NORMAL;
+ this._slidePosition = 0; // Fully slid in
+ this._collapseFraction = 0; // Not collapsed
+ }
+
+ setPorthole(x, y, width, height) {
+ this._viewport.set_size(width, height);
+ this._contents.set_position(-x, -y);
+ }
+
+ _lookupIndex(metaWindow) {
+ return this._windows.findIndex(w => w.metaWindow == metaWindow);
+ }
+
+ syncStacking(stackIndices) {
+ this._windows.sort((a, b) => {
+ let indexA = stackIndices[a.metaWindow.get_stable_sequence()];
+ let indexB = stackIndices[b.metaWindow.get_stable_sequence()];
+ return indexA - indexB;
+ });
+
+ for (let i = 1; i < this._windows.length; i++) {
+ let clone = this._windows[i];
+ const previousClone = this._windows[i - 1];
+ clone.setStackAbove(previousClone);
+ }
+ }
+
+ set slidePosition(slidePosition) {
+ if (this._slidePosition == slidePosition)
+ return;
+
+ const scale = Util.lerp(1, 0.75, slidePosition);
+ this.set_scale(scale, scale);
+ this.opacity = Util.lerp(255, 0, slidePosition);
+
+ this._slidePosition = slidePosition;
+ this.notify('slide-position');
+ this.queue_relayout();
+ }
+
+ get slidePosition() {
+ return this._slidePosition;
+ }
+
+ set collapseFraction(collapseFraction) {
+ if (this._collapseFraction == collapseFraction)
+ return;
+ this._collapseFraction = collapseFraction;
+ this.notify('collapse-fraction');
+ this.queue_relayout();
+ }
+
+ get collapseFraction() {
+ return this._collapseFraction;
+ }
+
+ _doRemoveWindow(metaWin) {
+ let clone = this._removeWindowClone(metaWin);
+ if (clone)
+ clone.destroy();
+ }
+
+ _doAddWindow(metaWin) {
+ if (this._removed)
+ return;
+
+ let win = metaWin.get_compositor_private();
+
+ if (!win) {
+ // Newly-created windows are added to a workspace before
+ // the compositor finds out about them...
+ let id = GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
+ if (!this._removed &&
+ metaWin.get_compositor_private() &&
+ metaWin.get_workspace() == this.metaWorkspace)
+ this._doAddWindow(metaWin);
+ return GLib.SOURCE_REMOVE;
+ });
+ GLib.Source.set_name_by_id(id, '[gnome-shell] this._doAddWindow');
+ return;
+ }
+
+ if (!this._allWindows.includes(metaWin)) {
+ metaWin.connectObject('notify::minimized',
+ this._updateMinimized.bind(this), this);
+ this._allWindows.push(metaWin);
+ }
+
+ // We might have the window in our list already if it was on all workspaces and
+ // now was moved to this workspace
+ if (this._lookupIndex(metaWin) != -1)
+ return;
+
+ if (!this._isMyWindow(win))
+ return;
+
+ if (this._isOverviewWindow(win)) {
+ this._addWindowClone(win);
+ } else if (metaWin.is_attached_dialog()) {
+ let parent = metaWin.get_transient_for();
+ while (parent.is_attached_dialog())
+ parent = parent.get_transient_for();
+
+ let idx = this._lookupIndex(parent);
+ if (idx < 0) {
+ // parent was not created yet, it will take care
+ // of the dialog when created
+ return;
+ }
+
+ let clone = this._windows[idx];
+ clone.addAttachedDialog(metaWin);
+ }
+ }
+
+ _windowAdded(metaWorkspace, metaWin) {
+ this._doAddWindow(metaWin);
+ }
+
+ _windowRemoved(metaWorkspace, metaWin) {
+ let index = this._allWindows.indexOf(metaWin);
+ if (index != -1) {
+ metaWin.disconnectObject(this);
+ this._allWindows.splice(index, 1);
+ }
+
+ this._doRemoveWindow(metaWin);
+ }
+
+ _windowEnteredMonitor(metaDisplay, monitorIndex, metaWin) {
+ if (monitorIndex == this.monitorIndex)
+ this._doAddWindow(metaWin);
+ }
+
+ _windowLeftMonitor(metaDisplay, monitorIndex, metaWin) {
+ if (monitorIndex == this.monitorIndex)
+ this._doRemoveWindow(metaWin);
+ }
+
+ _updateMinimized(metaWin) {
+ if (metaWin.minimized)
+ this._doRemoveWindow(metaWin);
+ else
+ this._doAddWindow(metaWin);
+ }
+
+ workspaceRemoved() {
+ if (this._removed)
+ return;
+
+ this._removed = true;
+
+ this.metaWorkspace.disconnectObject(this);
+ global.display.disconnectObject(this);
+ this._allWindows.forEach(w => w.disconnectObject(this));
+ }
+
+ _onDestroy() {
+ this.workspaceRemoved();
+ this._windows = [];
+ }
+
+ // Tests if @actor belongs to this workspace and monitor
+ _isMyWindow(actor) {
+ let win = actor.meta_window;
+ return win.located_on_workspace(this.metaWorkspace) &&
+ (win.get_monitor() == this.monitorIndex);
+ }
+
+ // Tests if @win should be shown in the Overview
+ _isOverviewWindow(win) {
+ return !win.get_meta_window().skip_taskbar &&
+ win.get_meta_window().showing_on_its_workspace();
+ }
+
+ // Create a clone of a (non-desktop) window and add it to the window list
+ _addWindowClone(win) {
+ let clone = new WindowClone(win);
+
+ clone.connect('selected', (o, time) => {
+ this.activate(time);
+ });
+ clone.connect('drag-begin', () => {
+ Main.overview.beginWindowDrag(clone.metaWindow);
+ });
+ clone.connect('drag-cancelled', () => {
+ Main.overview.cancelledWindowDrag(clone.metaWindow);
+ });
+ clone.connect('drag-end', () => {
+ Main.overview.endWindowDrag(clone.metaWindow);
+ });
+ clone.connect('destroy', () => {
+ this._removeWindowClone(clone.metaWindow);
+ });
+ this._contents.add_actor(clone);
+
+ if (this._windows.length > 0)
+ clone.setStackAbove(this._windows[this._windows.length - 1]);
+
+ this._windows.push(clone);
+
+ return clone;
+ }
+
+ _removeWindowClone(metaWin) {
+ // find the position of the window in our list
+ let index = this._lookupIndex(metaWin);
+
+ if (index == -1)
+ return null;
+
+ return this._windows.splice(index, 1).pop();
+ }
+
+ activate(time) {
+ if (this.state > ThumbnailState.NORMAL)
+ return;
+
+ // a click on the already current workspace should go back to the main view
+ if (this.metaWorkspace.active)
+ Main.overview.hide();
+ else
+ this.metaWorkspace.activate(time);
+ }
+
+ // Draggable target interface used only by ThumbnailsBox
+ handleDragOverInternal(source, actor, time) {
+ if (source == Main.xdndHandler) {
+ this.metaWorkspace.activate(time);
+ return DND.DragMotionResult.CONTINUE;
+ }
+
+ if (this.state > ThumbnailState.NORMAL)
+ return DND.DragMotionResult.CONTINUE;
+
+ if (source.metaWindow &&
+ !this._isMyWindow(source.metaWindow.get_compositor_private()))
+ return DND.DragMotionResult.MOVE_DROP;
+ if (source.app && source.app.can_open_new_window())
+ return DND.DragMotionResult.COPY_DROP;
+ if (!source.app && source.shellWorkspaceLaunch)
+ return DND.DragMotionResult.COPY_DROP;
+
+ return DND.DragMotionResult.CONTINUE;
+ }
+
+ acceptDropInternal(source, actor, time) {
+ if (this.state > ThumbnailState.NORMAL)
+ return false;
+
+ if (source.metaWindow) {
+ let win = source.metaWindow.get_compositor_private();
+ if (this._isMyWindow(win))
+ return false;
+
+ let metaWindow = win.get_meta_window();
+ Main.moveWindowToMonitorAndWorkspace(metaWindow,
+ this.monitorIndex, this.metaWorkspace.index());
+ return true;
+ } else if (source.app && source.app.can_open_new_window()) {
+ if (source.animateLaunchAtPos)
+ source.animateLaunchAtPos(actor.x, actor.y);
+
+ source.app.open_new_window(this.metaWorkspace.index());
+ return true;
+ } else if (!source.app && source.shellWorkspaceLaunch) {
+ // While unused in our own drag sources, shellWorkspaceLaunch allows
+ // extensions to define custom actions for their drag sources.
+ source.shellWorkspaceLaunch({
+ workspace: this.metaWorkspace.index(),
+ timestamp: time,
+ });
+ return true;
+ }
+
+ return false;
+ }
+
+ setScale(scaleX, scaleY) {
+ this._viewport.set_scale(scaleX, scaleY);
+ }
+});
+
+
+var ThumbnailsBox = GObject.registerClass({
+ Properties: {
+ 'expand-fraction': GObject.ParamSpec.double(
+ 'expand-fraction', 'expand-fraction', 'expand-fraction',
+ GObject.ParamFlags.READWRITE,
+ 0, 1, 1),
+ 'scale': GObject.ParamSpec.double(
+ 'scale', 'scale', 'scale',
+ GObject.ParamFlags.READWRITE,
+ 0, Infinity, 0),
+ 'should-show': GObject.ParamSpec.boolean(
+ 'should-show', 'should-show', 'should-show',
+ GObject.ParamFlags.READABLE,
+ true),
+ },
+}, class ThumbnailsBox extends St.Widget {
+ _init(scrollAdjustment, monitorIndex) {
+ super._init({
+ style_class: 'workspace-thumbnails',
+ reactive: true,
+ x_align: Clutter.ActorAlign.CENTER,
+ pivot_point: new Graphene.Point({ x: 0.5, y: 0.5 }),
+ });
+
+ this._delegate = this;
+
+ let indicator = new St.Bin({ style_class: 'workspace-thumbnail-indicator' });
+
+ // We don't want the indicator to affect drag-and-drop
+ Shell.util_set_hidden_from_pick(indicator, true);
+
+ this._indicator = indicator;
+ this.add_actor(indicator);
+
+ this._monitorIndex = monitorIndex;
+
+ this._dropWorkspace = -1;
+ this._dropPlaceholderPos = -1;
+ this._dropPlaceholder = new St.Bin({ style_class: 'placeholder' });
+ this.add_actor(this._dropPlaceholder);
+ this._spliceIndex = -1;
+
+ this._targetScale = 0;
+ this._scale = 0;
+ this._expandFraction = 1;
+ this._updateStateId = 0;
+ this._pendingScaleUpdate = false;
+ this._animatingIndicator = false;
+
+ this._shouldShow = true;
+
+ this._stateCounts = {};
+ for (let key in ThumbnailState)
+ this._stateCounts[ThumbnailState[key]] = 0;
+
+ this._thumbnails = [];
+
+ Main.overview.connectObject(
+ 'showing', () => this._createThumbnails(),
+ 'hidden', () => this._destroyThumbnails(),
+ 'item-drag-begin', () => this._onDragBegin(),
+ 'item-drag-end', () => this._onDragEnd(),
+ 'item-drag-cancelled', () => this._onDragCancelled(),
+ 'window-drag-begin', () => this._onDragBegin(),
+ 'window-drag-end', () => this._onDragEnd(),
+ 'window-drag-cancelled', () => this._onDragCancelled(), this);
+
+ this._settings = new Gio.Settings({ schema_id: MUTTER_SCHEMA });
+ this._settings.connect('changed::dynamic-workspaces',
+ () => this._updateShouldShow());
+ this._updateShouldShow();
+
+ Main.layoutManager.connectObject('monitors-changed', () => {
+ this._destroyThumbnails();
+ if (Main.overview.visible)
+ this._createThumbnails();
+ }, this);
+
+ // The porthole is the part of the screen we're showing in the thumbnails
+ global.display.connectObject('workareas-changed',
+ () => this._updatePorthole(), this);
+ this._updatePorthole();
+
+ this.connect('notify::visible', () => {
+ if (!this.visible)
+ this._queueUpdateStates();
+ });
+ this.connect('destroy', () => this._onDestroy());
+
+ this._scrollAdjustment = scrollAdjustment;
+ this._scrollAdjustment.connectObject('notify::value',
+ () => this._updateIndicator(), this);
+ }
+
+ setMonitorIndex(monitorIndex) {
+ this._monitorIndex = monitorIndex;
+ }
+
+ _onDestroy() {
+ this._destroyThumbnails();
+ this._unqueueUpdateStates();
+
+ if (this._settings)
+ this._settings.run_dispose();
+ this._settings = null;
+ }
+
+ _updateShouldShow() {
+ const { nWorkspaces } = global.workspace_manager;
+ const shouldShow = this._settings.get_boolean('dynamic-workspaces')
+ ? nWorkspaces > NUM_WORKSPACES_THRESHOLD
+ : nWorkspaces > 1;
+
+ if (this._shouldShow === shouldShow)
+ return;
+
+ this._shouldShow = shouldShow;
+ this.notify('should-show');
+ }
+
+ _updateIndicator() {
+ const { value } = this._scrollAdjustment;
+ const { workspaceManager } = global;
+ const activeIndex = workspaceManager.get_active_workspace_index();
+
+ this._animatingIndicator = value !== activeIndex;
+
+ if (!this._animatingIndicator)
+ this._queueUpdateStates();
+
+ this.queue_relayout();
+ }
+
+ _activateThumbnailAtPoint(stageX, stageY, time) {
+ const [r_, x] = this.transform_stage_point(stageX, stageY);
+
+ const thumbnail = this._thumbnails.find(t => x >= t.x && x <= t.x + t.width);
+ if (thumbnail)
+ thumbnail.activate(time);
+ }
+
+ vfunc_button_release_event(buttonEvent) {
+ let { x, y } = buttonEvent;
+ this._activateThumbnailAtPoint(x, y, buttonEvent.time);
+ return Clutter.EVENT_STOP;
+ }
+
+ vfunc_touch_event(touchEvent) {
+ if (touchEvent.type == Clutter.EventType.TOUCH_END &&
+ global.display.is_pointer_emulating_sequence(touchEvent.sequence)) {
+ let { x, y } = touchEvent;
+ this._activateThumbnailAtPoint(x, y, touchEvent.time);
+ }
+
+ return Clutter.EVENT_STOP;
+ }
+
+ _onDragBegin() {
+ this._dragCancelled = false;
+ this._dragMonitor = {
+ dragMotion: this._onDragMotion.bind(this),
+ };
+ DND.addDragMonitor(this._dragMonitor);
+ }
+
+ _onDragEnd() {
+ if (this._dragCancelled)
+ return;
+
+ this._endDrag();
+ }
+
+ _onDragCancelled() {
+ this._dragCancelled = true;
+ this._endDrag();
+ }
+
+ _endDrag() {
+ this._clearDragPlaceholder();
+ DND.removeDragMonitor(this._dragMonitor);
+ }
+
+ _onDragMotion(dragEvent) {
+ if (!this.contains(dragEvent.targetActor))
+ this._onLeave();
+ return DND.DragMotionResult.CONTINUE;
+ }
+
+ _onLeave() {
+ this._clearDragPlaceholder();
+ }
+
+ _clearDragPlaceholder() {
+ if (this._dropPlaceholderPos == -1)
+ return;
+
+ this._dropPlaceholderPos = -1;
+ this.queue_relayout();
+ }
+
+ _getPlaceholderTarget(index, spacing, rtl) {
+ const workspace = this._thumbnails[index];
+
+ let targetX1;
+ let targetX2;
+
+ if (rtl) {
+ const baseX = workspace.x + workspace.width;
+ targetX1 = baseX - WORKSPACE_CUT_SIZE;
+ targetX2 = baseX + spacing + WORKSPACE_CUT_SIZE;
+ } else {
+ targetX1 = workspace.x - spacing - WORKSPACE_CUT_SIZE;
+ targetX2 = workspace.x + WORKSPACE_CUT_SIZE;
+ }
+
+ if (index === 0) {
+ if (rtl)
+ targetX2 -= spacing + WORKSPACE_CUT_SIZE;
+ else
+ targetX1 += spacing + WORKSPACE_CUT_SIZE;
+ }
+
+ if (index === this._dropPlaceholderPos) {
+ const placeholderWidth = this._dropPlaceholder.get_width() + spacing;
+ if (rtl)
+ targetX2 += placeholderWidth;
+ else
+ targetX1 -= placeholderWidth;
+ }
+
+ return [targetX1, targetX2];
+ }
+
+ _withinWorkspace(x, index, rtl) {
+ const length = this._thumbnails.length;
+ const workspace = this._thumbnails[index];
+
+ let workspaceX1 = workspace.x + WORKSPACE_CUT_SIZE;
+ let workspaceX2 = workspace.x + workspace.width - WORKSPACE_CUT_SIZE;
+
+ if (index === length - 1) {
+ if (rtl)
+ workspaceX1 -= WORKSPACE_CUT_SIZE;
+ else
+ workspaceX2 += WORKSPACE_CUT_SIZE;
+ }
+
+ return x > workspaceX1 && x <= workspaceX2;
+ }
+
+ // Draggable target interface
+ handleDragOver(source, actor, x, y, time) {
+ if (!source.metaWindow &&
+ (!source.app || !source.app.can_open_new_window()) &&
+ (source.app || !source.shellWorkspaceLaunch) &&
+ source != Main.xdndHandler)
+ return DND.DragMotionResult.CONTINUE;
+
+ const rtl = Clutter.get_default_text_direction() === Clutter.TextDirection.RTL;
+ let canCreateWorkspaces = Meta.prefs_get_dynamic_workspaces();
+ let spacing = this.get_theme_node().get_length('spacing');
+
+ this._dropWorkspace = -1;
+ let placeholderPos = -1;
+ let length = this._thumbnails.length;
+ for (let i = 0; i < length; i++) {
+ const index = rtl ? length - i - 1 : i;
+
+ if (canCreateWorkspaces && source !== Main.xdndHandler) {
+ const [targetStart, targetEnd] =
+ this._getPlaceholderTarget(index, spacing, rtl);
+
+ if (x > targetStart && x <= targetEnd) {
+ placeholderPos = index;
+ break;
+ }
+ }
+
+ if (this._withinWorkspace(x, index, rtl)) {
+ this._dropWorkspace = index;
+ break;
+ }
+ }
+
+ if (this._dropPlaceholderPos != placeholderPos) {
+ this._dropPlaceholderPos = placeholderPos;
+ this.queue_relayout();
+ }
+
+ if (this._dropWorkspace != -1)
+ return this._thumbnails[this._dropWorkspace].handleDragOverInternal(source, actor, time);
+ else if (this._dropPlaceholderPos != -1)
+ return source.metaWindow ? DND.DragMotionResult.MOVE_DROP : DND.DragMotionResult.COPY_DROP;
+ else
+ return DND.DragMotionResult.CONTINUE;
+ }
+
+ acceptDrop(source, actor, x, y, time) {
+ if (this._dropWorkspace != -1) {
+ return this._thumbnails[this._dropWorkspace].acceptDropInternal(source, actor, time);
+ } else if (this._dropPlaceholderPos != -1) {
+ if (!source.metaWindow &&
+ (!source.app || !source.app.can_open_new_window()) &&
+ (source.app || !source.shellWorkspaceLaunch))
+ return false;
+
+ let isWindow = !!source.metaWindow;
+
+ let newWorkspaceIndex;
+ [newWorkspaceIndex, this._dropPlaceholderPos] = [this._dropPlaceholderPos, -1];
+ this._spliceIndex = newWorkspaceIndex;
+
+ Main.wm.insertWorkspace(newWorkspaceIndex);
+
+ if (isWindow) {
+ // Move the window to our monitor first if necessary.
+ let thumbMonitor = this._thumbnails[newWorkspaceIndex].monitorIndex;
+ Main.moveWindowToMonitorAndWorkspace(source.metaWindow,
+ thumbMonitor, newWorkspaceIndex, true);
+ } else if (source.app && source.app.can_open_new_window()) {
+ if (source.animateLaunchAtPos)
+ source.animateLaunchAtPos(actor.x, actor.y);
+
+ source.app.open_new_window(newWorkspaceIndex);
+ } else if (!source.app && source.shellWorkspaceLaunch) {
+ // While unused in our own drag sources, shellWorkspaceLaunch allows
+ // extensions to define custom actions for their drag sources.
+ source.shellWorkspaceLaunch({
+ workspace: newWorkspaceIndex,
+ timestamp: time,
+ });
+ }
+
+ if (source.app || (!source.app && source.shellWorkspaceLaunch)) {
+ // This new workspace will be automatically removed if the application fails
+ // to open its first window within some time, as tracked by Shell.WindowTracker.
+ // Here, we only add a very brief timeout to avoid the _immediate_ removal of the
+ // workspace while we wait for the startup sequence to load.
+ let workspaceManager = global.workspace_manager;
+ Main.wm.keepWorkspaceAlive(workspaceManager.get_workspace_by_index(newWorkspaceIndex),
+ WORKSPACE_KEEP_ALIVE_TIME);
+ }
+
+ // Start the animation on the workspace (which is actually
+ // an old one which just became empty)
+ let thumbnail = this._thumbnails[newWorkspaceIndex];
+ this._setThumbnailState(thumbnail, ThumbnailState.NEW);
+ thumbnail.slide_position = 1;
+ thumbnail.collapse_fraction = 1;
+
+ this._queueUpdateStates();
+
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ _createThumbnails() {
+ if (this._thumbnails.length > 0)
+ return;
+
+ const { workspaceManager } = global;
+ this._transientSignalHolder = new TransientSignalHolder(this);
+ workspaceManager.connectObject(
+ 'notify::n-workspaces', this._workspacesChanged.bind(this),
+ 'active-workspace-changed', () => this._updateIndicator(),
+ 'workspaces-reordered', () => {
+ this._thumbnails.sort((a, b) => {
+ return a.metaWorkspace.index() - b.metaWorkspace.index();
+ });
+ this.queue_relayout();
+ }, this._transientSignalHolder);
+ Main.overview.connectObject('windows-restacked',
+ this._syncStacking.bind(this), this._transientSignalHolder);
+
+ this._targetScale = 0;
+ this._scale = 0;
+ this._pendingScaleUpdate = false;
+ this._unqueueUpdateStates();
+
+ this._stateCounts = {};
+ for (let key in ThumbnailState)
+ this._stateCounts[ThumbnailState[key]] = 0;
+
+ this.addThumbnails(0, workspaceManager.n_workspaces);
+
+ this._updateShouldShow();
+ }
+
+ _destroyThumbnails() {
+ if (this._thumbnails.length == 0)
+ return;
+
+ this._transientSignalHolder.destroy();
+ delete this._transientSignalHolder;
+
+ for (let w = 0; w < this._thumbnails.length; w++)
+ this._thumbnails[w].destroy();
+ this._thumbnails = [];
+ }
+
+ _workspacesChanged() {
+ let validThumbnails =
+ this._thumbnails.filter(t => t.state <= ThumbnailState.NORMAL);
+ let workspaceManager = global.workspace_manager;
+ let oldNumWorkspaces = validThumbnails.length;
+ let newNumWorkspaces = workspaceManager.n_workspaces;
+
+ if (newNumWorkspaces > oldNumWorkspaces) {
+ this.addThumbnails(oldNumWorkspaces, newNumWorkspaces - oldNumWorkspaces);
+ } else {
+ let removedIndex;
+ let removedNum = oldNumWorkspaces - newNumWorkspaces;
+ for (let w = 0; w < oldNumWorkspaces; w++) {
+ let metaWorkspace = workspaceManager.get_workspace_by_index(w);
+ if (this._thumbnails[w].metaWorkspace != metaWorkspace) {
+ removedIndex = w;
+ break;
+ }
+ }
+
+ this.removeThumbnails(removedIndex, removedNum);
+ }
+
+ this._updateShouldShow();
+ }
+
+ addThumbnails(start, count) {
+ let workspaceManager = global.workspace_manager;
+
+ for (let k = start; k < start + count; k++) {
+ let metaWorkspace = workspaceManager.get_workspace_by_index(k);
+ let thumbnail = new WorkspaceThumbnail(metaWorkspace, this._monitorIndex);
+ thumbnail.setPorthole(this._porthole.x, this._porthole.y,
+ this._porthole.width, this._porthole.height);
+ this._thumbnails.push(thumbnail);
+ this.add_actor(thumbnail);
+
+ if (this._shouldShow && start > 0 && this._spliceIndex === -1) {
+ // not the initial fill, and not splicing via DND
+ thumbnail.state = ThumbnailState.NEW;
+ thumbnail.slide_position = 1; // start slid out
+ thumbnail.collapse_fraction = 1; // start fully collapsed
+ this._haveNewThumbnails = true;
+ } else {
+ thumbnail.state = ThumbnailState.NORMAL;
+ }
+
+ this._stateCounts[thumbnail.state]++;
+ }
+
+ this._queueUpdateStates();
+
+ // The thumbnails indicator actually needs to be on top of the thumbnails
+ this.set_child_above_sibling(this._indicator, null);
+
+ // Clear the splice index, we got the message
+ this._spliceIndex = -1;
+ }
+
+ removeThumbnails(start, count) {
+ let currentPos = 0;
+ for (let k = 0; k < this._thumbnails.length; k++) {
+ let thumbnail = this._thumbnails[k];
+
+ if (thumbnail.state > ThumbnailState.NORMAL)
+ continue;
+
+ if (currentPos >= start && currentPos < start + count) {
+ thumbnail.workspaceRemoved();
+ this._setThumbnailState(thumbnail, ThumbnailState.REMOVING);
+ }
+
+ currentPos++;
+ }
+
+ this._queueUpdateStates();
+ }
+
+ _syncStacking(overview, stackIndices) {
+ for (let i = 0; i < this._thumbnails.length; i++)
+ this._thumbnails[i].syncStacking(stackIndices);
+ }
+
+ set scale(scale) {
+ if (this._scale == scale)
+ return;
+
+ this._scale = scale;
+ this.notify('scale');
+ this.queue_relayout();
+ }
+
+ get scale() {
+ return this._scale;
+ }
+
+ _setThumbnailState(thumbnail, state) {
+ this._stateCounts[thumbnail.state]--;
+ thumbnail.state = state;
+ this._stateCounts[thumbnail.state]++;
+ }
+
+ _iterateStateThumbnails(state, callback) {
+ if (this._stateCounts[state] == 0)
+ return;
+
+ for (let i = 0; i < this._thumbnails.length; i++) {
+ if (this._thumbnails[i].state == state)
+ callback.call(this, this._thumbnails[i]);
+ }
+ }
+
+ _updateStates() {
+ this._updateStateId = 0;
+
+ // If we are animating the indicator, wait
+ if (this._animatingIndicator)
+ return;
+
+ // Likewise if we are in the process of hiding
+ if (!this._shouldShow && this.visible)
+ return;
+
+ // Then slide out any thumbnails that have been destroyed
+ this._iterateStateThumbnails(ThumbnailState.REMOVING, thumbnail => {
+ this._setThumbnailState(thumbnail, ThumbnailState.ANIMATING_OUT);
+
+ thumbnail.ease_property('slide-position', 1, {
+ duration: SLIDE_ANIMATION_TIME,
+ mode: Clutter.AnimationMode.LINEAR,
+ onComplete: () => {
+ this._setThumbnailState(thumbnail, ThumbnailState.ANIMATED_OUT);
+ this._queueUpdateStates();
+ },
+ });
+ });
+
+ // As long as things are sliding out, don't proceed
+ if (this._stateCounts[ThumbnailState.ANIMATING_OUT] > 0)
+ return;
+
+ // Once that's complete, we can start scaling to the new size,
+ // collapse any removed thumbnails and expand added ones
+ this._iterateStateThumbnails(ThumbnailState.ANIMATED_OUT, thumbnail => {
+ this._setThumbnailState(thumbnail, ThumbnailState.COLLAPSING);
+ thumbnail.ease_property('collapse-fraction', 1, {
+ duration: RESCALE_ANIMATION_TIME,
+ mode: Clutter.AnimationMode.EASE_OUT_QUAD,
+ onComplete: () => {
+ this._stateCounts[thumbnail.state]--;
+ thumbnail.state = ThumbnailState.DESTROYED;
+
+ let index = this._thumbnails.indexOf(thumbnail);
+ this._thumbnails.splice(index, 1);
+ thumbnail.destroy();
+
+ this._queueUpdateStates();
+ },
+ });
+ });
+
+ this._iterateStateThumbnails(ThumbnailState.NEW, thumbnail => {
+ this._setThumbnailState(thumbnail, ThumbnailState.EXPANDING);
+ thumbnail.ease_property('collapse-fraction', 0, {
+ duration: SLIDE_ANIMATION_TIME,
+ mode: Clutter.AnimationMode.EASE_OUT_QUAD,
+ onComplete: () => {
+ this._setThumbnailState(thumbnail, ThumbnailState.EXPANDED);
+ this._queueUpdateStates();
+ },
+ });
+ });
+
+ if (this._pendingScaleUpdate) {
+ this.ease_property('scale', this._targetScale, {
+ mode: Clutter.AnimationMode.EASE_OUT_QUAD,
+ duration: RESCALE_ANIMATION_TIME,
+ onComplete: () => this._queueUpdateStates(),
+ });
+ this._pendingScaleUpdate = false;
+ }
+
+ // Wait until that's done
+ if (this._scale !== this._targetScale ||
+ this._stateCounts[ThumbnailState.COLLAPSING] > 0 ||
+ this._stateCounts[ThumbnailState.EXPANDING] > 0)
+ return;
+
+ // And then slide in any new thumbnails
+ this._iterateStateThumbnails(ThumbnailState.EXPANDED, thumbnail => {
+ this._setThumbnailState(thumbnail, ThumbnailState.ANIMATING_IN);
+ thumbnail.ease_property('slide-position', 0, {
+ duration: SLIDE_ANIMATION_TIME,
+ mode: Clutter.AnimationMode.EASE_OUT_QUAD,
+ onComplete: () => {
+ this._setThumbnailState(thumbnail, ThumbnailState.NORMAL);
+ },
+ });
+ });
+ }
+
+ _queueUpdateStates() {
+ if (this._updateStateId > 0)
+ return;
+
+ this._updateStateId = Meta.later_add(
+ Meta.LaterType.BEFORE_REDRAW, () => this._updateStates());
+ }
+
+ _unqueueUpdateStates() {
+ if (this._updateStateId)
+ Meta.later_remove(this._updateStateId);
+ this._updateStateId = 0;
+ }
+
+ vfunc_get_preferred_height(forWidth) {
+ let themeNode = this.get_theme_node();
+
+ forWidth = themeNode.adjust_for_width(forWidth);
+
+ let spacing = themeNode.get_length('spacing');
+ let nWorkspaces = this._thumbnails.length;
+ let totalSpacing = (nWorkspaces - 1) * spacing;
+
+ const avail = forWidth - totalSpacing;
+
+ let scale = (avail / nWorkspaces) / this._porthole.width;
+ scale = Math.min(scale, MAX_THUMBNAIL_SCALE);
+
+ const height = Math.round(this._porthole.height * scale);
+ return themeNode.adjust_preferred_height(height, height);
+ }
+
+ vfunc_get_preferred_width(_forHeight) {
+ // Note that for getPreferredHeight/Width we cheat a bit and skip propagating
+ // the size request to our children because we know how big they are and know
+ // that the actors aren't depending on the virtual functions being called.
+ let themeNode = this.get_theme_node();
+
+ let spacing = themeNode.get_length('spacing');
+ let nWorkspaces = this._thumbnails.length;
+ let totalSpacing = (nWorkspaces - 1) * spacing;
+
+ const naturalWidth = this._thumbnails.reduce((accumulator, thumbnail, index) => {
+ let workspaceSpacing = 0;
+
+ if (index > 0)
+ workspaceSpacing += spacing / 2;
+ if (index < this._thumbnails.length - 1)
+ workspaceSpacing += spacing / 2;
+
+ const progress = 1 - thumbnail.collapse_fraction;
+ const width = (this._porthole.width * MAX_THUMBNAIL_SCALE + workspaceSpacing) * progress;
+ return accumulator + width;
+ }, 0);
+
+ return themeNode.adjust_preferred_width(totalSpacing, naturalWidth);
+ }
+
+ _updatePorthole() {
+ if (!Main.layoutManager.monitors[this._monitorIndex]) {
+ const { x, y, width, height } = global.stage;
+ this._porthole = { x, y, width, height };
+ } else {
+ this._porthole =
+ Main.layoutManager.getWorkAreaForMonitor(this._monitorIndex);
+ }
+
+ this.queue_relayout();
+ }
+
+ vfunc_allocate(box) {
+ this.set_allocation(box);
+
+ let rtl = Clutter.get_default_text_direction() == Clutter.TextDirection.RTL;
+
+ if (this._thumbnails.length == 0) // not visible
+ return;
+
+ let themeNode = this.get_theme_node();
+ box = themeNode.get_content_box(box);
+
+ const portholeWidth = this._porthole.width;
+ const portholeHeight = this._porthole.height;
+ const spacing = themeNode.get_length('spacing');
+
+ const nWorkspaces = this._thumbnails.length;
+
+ // Compute the scale we'll need once everything is updated,
+ // unless we are currently transitioning
+ if (this._expandFraction === 1) {
+ const totalSpacing = (nWorkspaces - 1) * spacing;
+ const availableWidth = (box.get_width() - totalSpacing) / nWorkspaces;
+
+ const hScale = availableWidth / portholeWidth;
+ const vScale = box.get_height() / portholeHeight;
+ const newScale = Math.min(hScale, vScale);
+
+ if (newScale !== this._targetScale) {
+ if (this._targetScale > 0) {
+ // We don't ease immediately because we need to observe the
+ // ordering in queueUpdateStates - if workspaces have been
+ // removed we need to slide them out as the first thing.
+ this._targetScale = newScale;
+ this._pendingScaleUpdate = true;
+ } else {
+ this._targetScale = this._scale = newScale;
+ }
+
+ this._queueUpdateStates();
+ }
+ }
+
+ const ratio = portholeWidth / portholeHeight;
+ const thumbnailFullHeight = Math.round(portholeHeight * this._scale);
+ const thumbnailWidth = Math.round(thumbnailFullHeight * ratio);
+ const thumbnailHeight = thumbnailFullHeight * this._expandFraction;
+ const roundedVScale = thumbnailHeight / portholeHeight;
+
+ // We always request size for MAX_THUMBNAIL_SCALE, distribute
+ // space evently if we use smaller thumbnails
+ const extraWidth =
+ (MAX_THUMBNAIL_SCALE * portholeWidth - thumbnailWidth) * nWorkspaces;
+ box.x1 += Math.round(extraWidth / 2);
+ box.x2 -= Math.round(extraWidth / 2);
+
+ let indicatorValue = this._scrollAdjustment.value;
+ let indicatorUpperWs = Math.ceil(indicatorValue);
+ let indicatorLowerWs = Math.floor(indicatorValue);
+
+ let indicatorLowerX1 = 0;
+ let indicatorLowerX2 = 0;
+ let indicatorUpperX1 = 0;
+ let indicatorUpperX2 = 0;
+
+ let indicatorThemeNode = this._indicator.get_theme_node();
+ let indicatorTopFullBorder = indicatorThemeNode.get_padding(St.Side.TOP) + indicatorThemeNode.get_border_width(St.Side.TOP);
+ let indicatorBottomFullBorder = indicatorThemeNode.get_padding(St.Side.BOTTOM) + indicatorThemeNode.get_border_width(St.Side.BOTTOM);
+ let indicatorLeftFullBorder = indicatorThemeNode.get_padding(St.Side.LEFT) + indicatorThemeNode.get_border_width(St.Side.LEFT);
+ let indicatorRightFullBorder = indicatorThemeNode.get_padding(St.Side.RIGHT) + indicatorThemeNode.get_border_width(St.Side.RIGHT);
+
+ let x = box.x1;
+
+ if (this._dropPlaceholderPos == -1) {
+ this._dropPlaceholder.allocate_preferred_size(
+ ...this._dropPlaceholder.get_position());
+
+ Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
+ this._dropPlaceholder.hide();
+ });
+ }
+
+ let childBox = new Clutter.ActorBox();
+
+ for (let i = 0; i < this._thumbnails.length; i++) {
+ const thumbnail = this._thumbnails[i];
+ if (i > 0)
+ x += spacing - Math.round(thumbnail.collapse_fraction * spacing);
+
+ const y1 = box.y1;
+ const y2 = y1 + thumbnailHeight;
+
+ if (i === this._dropPlaceholderPos) {
+ const [, placeholderWidth] = this._dropPlaceholder.get_preferred_width(-1);
+ childBox.y1 = y1;
+ childBox.y2 = y2;
+
+ if (rtl) {
+ childBox.x2 = box.x2 - Math.round(x);
+ childBox.x1 = box.x2 - Math.round(x + placeholderWidth);
+ } else {
+ childBox.x1 = Math.round(x);
+ childBox.x2 = Math.round(x + placeholderWidth);
+ }
+
+ this._dropPlaceholder.allocate(childBox);
+
+ Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
+ this._dropPlaceholder.show();
+ });
+ x += placeholderWidth + spacing;
+ }
+
+ // We might end up with thumbnailWidth being something like 99.33
+ // pixels. To make this work and not end up with a gap at the end,
+ // we need some thumbnails to be 99 pixels and some 100 pixels width;
+ // we compute an actual scale separately for each thumbnail.
+ const x1 = Math.round(x);
+ const x2 = Math.round(x + thumbnailWidth);
+ const roundedHScale = (x2 - x1) / portholeWidth;
+
+ // Allocating a scaled actor is funny - x1/y1 correspond to the origin
+ // of the actor, but x2/y2 are increased by the *unscaled* size.
+ if (rtl) {
+ childBox.x2 = box.x2 - x1;
+ childBox.x1 = box.x2 - (x1 + thumbnailWidth);
+ } else {
+ childBox.x1 = x1;
+ childBox.x2 = x1 + thumbnailWidth;
+ }
+ childBox.y1 = y1;
+ childBox.y2 = y1 + thumbnailHeight;
+
+ thumbnail.setScale(roundedHScale, roundedVScale);
+ thumbnail.allocate(childBox);
+
+ if (i === indicatorUpperWs) {
+ indicatorUpperX1 = childBox.x1;
+ indicatorUpperX2 = childBox.x2;
+ }
+ if (i === indicatorLowerWs) {
+ indicatorLowerX1 = childBox.x1;
+ indicatorLowerX2 = childBox.x2;
+ }
+
+ // We round the collapsing portion so that we don't get thumbnails resizing
+ // during an animation due to differences in rounded, but leave the uncollapsed
+ // portion unrounded so that non-animating we end up with the right total
+ x += thumbnailWidth - Math.round(thumbnailWidth * thumbnail.collapse_fraction);
+ }
+
+ childBox.y1 = box.y1;
+ childBox.y2 = box.y1 + thumbnailHeight;
+
+ const indicatorX1 = indicatorLowerX1 +
+ (indicatorUpperX1 - indicatorLowerX1) * (indicatorValue % 1);
+ const indicatorX2 = indicatorLowerX2 +
+ (indicatorUpperX2 - indicatorLowerX2) * (indicatorValue % 1);
+
+ childBox.x1 = indicatorX1 - indicatorLeftFullBorder;
+ childBox.x2 = indicatorX2 + indicatorRightFullBorder;
+ childBox.y1 -= indicatorTopFullBorder;
+ childBox.y2 += indicatorBottomFullBorder;
+ this._indicator.allocate(childBox);
+ }
+
+ get shouldShow() {
+ return this._shouldShow;
+ }
+
+ set expandFraction(expandFraction) {
+ if (this._expandFraction === expandFraction)
+ return;
+ this._expandFraction = expandFraction;
+ this.notify('expand-fraction');
+ this.queue_relayout();
+ }
+
+ get expandFraction() {
+ return this._expandFraction;
+ }
+});