gnome-shell/js/ui/workspaceThumbnail.js

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/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const DND = imports.ui.dnd;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
const Workspace = imports.ui.workspace;
const WorkspacesView = imports.ui.workspacesView;
// The maximum size of a thumbnail is 1/8 the width and height of the screen
let MAX_THUMBNAIL_SCALE = 1/8.;
const RESCALE_ANIMATION_TIME = 0.2;
const SLIDE_ANIMATION_TIME = 0.2;
function WindowClone(realWindow) {
this._init(realWindow);
}
WindowClone.prototype = {
_init : function(realWindow) {
this.actor = new Clutter.Clone({ source: realWindow.get_texture(),
reactive: true });
this.actor._delegate = this;
this.realWindow = realWindow;
this.metaWindow = realWindow.meta_window;
this._positionChangedId = this.realWindow.connect('position-changed',
Lang.bind(this, this._onPositionChanged));
this._realWindowDestroyedId = this.realWindow.connect('destroy',
Lang.bind(this, this._disconnectRealWindowSignals));
this._onPositionChanged();
this.actor.connect('button-release-event',
Lang.bind(this, this._onButtonRelease));
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this._draggable = DND.makeDraggable(this.actor,
{ restoreOnSuccess: true,
dragActorMaxSize: Workspace.WINDOW_DND_SIZE,
dragActorOpacity: Workspace.DRAGGING_WINDOW_OPACITY });
this._draggable.connect('drag-begin', Lang.bind(this, this._onDragBegin));
this._draggable.connect('drag-end', Lang.bind(this, this._onDragEnd));
this.inDrag = false;
},
setStackAbove: function (actor) {
this._stackAbove = actor;
if (this._stackAbove == null)
this.actor.lower_bottom();
else
this.actor.raise(this._stackAbove);
},
destroy: function () {
this.actor.destroy();
},
_onPositionChanged: function() {
let rect = this.metaWindow.get_outer_rect();
this.actor.set_position(this.realWindow.x, this.realWindow.y);
},
_disconnectRealWindowSignals: function() {
if (this._positionChangedId != 0) {
this.realWindow.disconnect(this._positionChangedId);
this._positionChangedId = 0;
}
if (this._realWindowDestroyedId != 0) {
this.realWindow.disconnect(this._realWindowDestroyedId);
this._realWindowDestroyedId = 0;
}
},
_onDestroy: function() {
this._disconnectRealWindowSignals();
this.actor._delegate = null;
if (this.inDrag) {
this.emit('drag-end');
this.inDrag = false;
}
this.disconnectAll();
},
_onButtonRelease : function (actor, event) {
this.emit('selected', event.get_time());
return true;
},
_onDragBegin : function (draggable, time) {
this.inDrag = true;
this.emit('drag-begin');
},
_onDragEnd : function (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.
if (this.actor.get_parent() != null) {
if (this._stackAbove == null)
this.actor.lower_bottom();
else
this.actor.raise(this._stackAbove);
}
this.emit('drag-end');
}
};
Signals.addSignalMethods(WindowClone.prototype);
const ThumbnailState = {
NEW : 0,
ANIMATING_IN : 1,
NORMAL: 2,
REMOVING : 3,
ANIMATING_OUT : 4,
ANIMATED_OUT : 5,
COLLAPSING : 6,
DESTROYED : 7
};
/**
* @metaWorkspace: a #Meta.Workspace
*/
function WorkspaceThumbnail(metaWorkspace) {
this._init(metaWorkspace);
}
WorkspaceThumbnail.prototype = {
_init : function(metaWorkspace) {
this.metaWorkspace = metaWorkspace;
this.monitorIndex = Main.layoutManager.primaryIndex;
this.actor = new St.Group({ reactive: true,
clip_to_allocation: true,
style_class: 'workspace-thumbnail' });
this.actor._delegate = this;
this._contents = new Clutter.Group();
this.actor.add_actor(this._contents);
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this.actor.connect('button-press-event', Lang.bind(this,
function(actor, event) {
return true;
}));
this.actor.connect('button-release-event', Lang.bind(this,
function(actor, event) {
this._activate();
return true;
}));
this._background = Meta.BackgroundActor.new_for_screen(global.screen);
this._contents.add_actor(this._background);
let monitor = Main.layoutManager.primaryMonitor;
this.setPorthole(monitor.x, monitor.y, monitor.width, monitor.height);
let windows = global.get_window_actors().filter(this._isMyWindow, this);
// Create clones for windows that should be visible in the Overview
this._windows = [];
for (let i = 0; i < windows.length; i++) {
windows[i].meta_window._minimizedChangedId =
windows[i].meta_window.connect('notify::minimized',
Lang.bind(this,
this._updateMinimized));
if (this._isOverviewWindow(windows[i])) {
this._addWindowClone(windows[i]);
}
}
// Track window changes
this._windowAddedId = this.metaWorkspace.connect('window-added',
Lang.bind(this, this._windowAdded));
this._windowRemovedId = this.metaWorkspace.connect('window-removed',
Lang.bind(this, this._windowRemoved));
this._windowEnteredMonitorId = global.screen.connect('window-entered-monitor',
Lang.bind(this, this._windowEnteredMonitor));
this._windowLeftMonitorId = global.screen.connect('window-left-monitor',
Lang.bind(this, this._windowLeftMonitor));
this.state = ThumbnailState.NORMAL;
this._slidePosition = 0; // Fully slid in
this._collapseFraction = 0; // Not collapsed
},
setPorthole: function(x, y, width, height) {
this._portholeX = x;
this._portholeY = y;
this.actor.set_size(width, height);
this._contents.set_position(-x, -y);
},
_lookupIndex: function (metaWindow) {
for (let i = 0; i < this._windows.length; i++) {
if (this._windows[i].metaWindow == metaWindow) {
return i;
}
}
return -1;
},
syncStacking: function(stackIndices) {
this._windows.sort(function (a, b) { return stackIndices[a.metaWindow.get_stable_sequence()] - stackIndices[b.metaWindow.get_stable_sequence()]; });
for (let i = 0; i < this._windows.length; i++) {
let clone = this._windows[i];
let metaWindow = clone.metaWindow;
if (i == 0) {
clone.setStackAbove(this._background);
} else {
let previousClone = this._windows[i - 1];
clone.setStackAbove(previousClone.actor);
}
}
},
set slidePosition(slidePosition) {
this._slidePosition = slidePosition;
this.actor.queue_relayout();
},
get slidePosition() {
return this._slidePosition;
},
set collapseFraction(collapseFraction) {
this._collapseFraction = collapseFraction;
this.actor.queue_relayout();
},
get collapseFraction() {
return this._collapseFraction;
},
_doRemoveWindow : function(metaWin) {
let win = metaWin.get_compositor_private();
// find the position of the window in our list
let index = this._lookupIndex (metaWin);
if (index == -1)
return;
// Check if window still should be here
if (win && this._isMyWindow(win) && this._isOverviewWindow(win))
return;
let clone = this._windows[index];
this._windows.splice(index, 1);
if (win && this._isOverviewWindow(win)) {
if (metaWin._minimizedChangedId) {
metaWin.disconnect(metaWin._minimizedChangedId);
delete metaWin._minimizedChangedId;
}
}
clone.destroy();
},
_doAddWindow : function(metaWin) {
if (this.leavingOverview)
return;
let win = metaWin.get_compositor_private();
if (!win) {
// Newly-created windows are added to a workspace before
// the compositor finds out about them...
Mainloop.idle_add(Lang.bind(this,
function () {
if (this.actor &&
metaWin.get_compositor_private() &&
metaWin.get_workspace() == this.metaWorkspace)
this._doAddWindow(metaWin);
return false;
}));
return;
}
// 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 (!metaWin._minimizedChangedId)
metaWin._minimizedChangedId = metaWin.connect('notify::minimized',
Lang.bind(this,
this._updateMinimized));
if (!this._isMyWindow(win) || !this._isOverviewWindow(win))
return;
let clone = this._addWindowClone(win);
},
_windowAdded : function(metaWorkspace, metaWin) {
this._doAddWindow(metaWin);
},
_windowRemoved : function(metaWorkspace, metaWin) {
this._doRemoveWindow(metaWin);
},
_windowEnteredMonitor : function(metaScreen, monitorIndex, metaWin) {
if (monitorIndex == this.monitorIndex) {
this._doAddWindow(metaWin);
}
},
_windowLeftMonitor : function(metaScreen, monitorIndex, metaWin) {
if (monitorIndex == this.monitorIndex) {
this._doRemoveWindow(metaWin);
}
},
_updateMinimized: function(metaWin) {
if (metaWin.minimized)
this._doRemoveWindow(metaWin);
else
this._doAddWindow(metaWin);
},
destroy : function() {
this.actor.destroy();
},
_onDestroy: function(actor) {
this.metaWorkspace.disconnect(this._windowAddedId);
this.metaWorkspace.disconnect(this._windowRemovedId);
global.screen.disconnect(this._windowEnteredMonitorId);
global.screen.disconnect(this._windowLeftMonitorId);
for (let i = 0; i < this._windows.length; i++) {
let metaWin = this._windows[i].metaWindow;
if (metaWin._minimizedChangedId) {
metaWin.disconnect(metaWin._minimizedChangedId);
delete metaWin._minimizedChangedId;
}
}
this._windows = [];
this.actor = null;
},
// Tests if @win belongs to this workspace and monitor
_isMyWindow : function (win) {
return Main.isWindowActorDisplayedOnWorkspace(win, this.metaWorkspace.index()) &&
(!win.get_meta_window() || win.get_meta_window().get_monitor() == this.monitorIndex);
},
// Tests if @win should be shown in the Overview
_isOverviewWindow : function (win) {
let tracker = Shell.WindowTracker.get_default();
return tracker.is_window_interesting(win.get_meta_window()) &&
win.get_meta_window().showing_on_its_workspace();
},
// Create a clone of a (non-desktop) window and add it to the window list
_addWindowClone : function(win) {
let clone = new WindowClone(win);
clone.connect('selected',
Lang.bind(this, this._activate));
clone.connect('drag-begin',
Lang.bind(this, function(clone) {
Main.overview.beginWindowDrag();
}));
clone.connect('drag-end',
Lang.bind(this, function(clone) {
Main.overview.endWindowDrag();
}));
this._contents.add_actor(clone.actor);
if (this._windows.length == 0)
clone.setStackAbove(this._background);
else
clone.setStackAbove(this._windows[this._windows.length - 1].actor);
this._windows.push(clone);
return clone;
},
_activate : function (clone, time) {
if (this.state > ThumbnailState.NORMAL)
return;
// a click on the already current workspace should go back to the main view
if (this.metaWorkspace == global.screen.get_active_workspace())
Main.overview.hide();
else
this.metaWorkspace.activate(time);
},
// Draggable target interface
handleDragOver : function(source, actor, x, y, time) {
if (source == Main.xdndHandler) {
this.metaWorkspace.activate(time);
return DND.DragMotionResult.CONTINUE;
}
if (this.state > ThumbnailState.NORMAL)
return DND.DragMotionResult.CONTINUE;
if (source.realWindow && !this._isMyWindow(source.realWindow))
return DND.DragMotionResult.MOVE_DROP;
if (source.shellWorkspaceLaunch)
return DND.DragMotionResult.COPY_DROP;
return DND.DragMotionResult.CONTINUE;
},
acceptDrop : function(source, actor, x, y, time) {
if (this.state > ThumbnailState.NORMAL)
return false;
if (source.realWindow) {
let win = source.realWindow;
if (this._isMyWindow(win))
return false;
let metaWindow = win.get_meta_window();
// We need to move the window before changing the workspace, because
// the move itself could cause a workspace change if the window enters
// the primary monitor
if (metaWindow.get_monitor() != this.monitorIndex)
metaWindow.move_to_monitor(this.monitorIndex);
metaWindow.change_workspace_by_index(this.metaWorkspace.index(),
false, // don't create workspace
time);
return true;
} else if (source.shellWorkspaceLaunch) {
source.shellWorkspaceLaunch({ workspace: this.metaWorkspace ? this.metaWorkspace.index() : -1,
timestamp: time });
return true;
}
return false;
}
};
Signals.addSignalMethods(WorkspaceThumbnail.prototype);
function ThumbnailsBox() {
this._init();
}
ThumbnailsBox.prototype = {
_init: function() {
this.actor = new Shell.GenericContainer({ style_class: 'workspace-thumbnails',
request_mode: Clutter.RequestMode.WIDTH_FOR_HEIGHT });
this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this.actor.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this.actor.connect('allocate', Lang.bind(this, this._allocate));
// When we animate the scale, we don't animate the requested size of the thumbnails, rather
// we ask for our final size and then animate within that size. This slightly simplifies the
// interaction with the main workspace windows (instead of constantly reallocating them
// to a new size, they get a new size once, then use the standard window animation code
// allocate the windows to their new positions), however it causes problems for drawing
// the background and border wrapped around the thumbnail as we animate - we can't just pack
// the container into a box and set style properties on the box since that box would wrap
// around the final size not the animating size. So instead we fake the background with
// an actor underneath the content and adjust the allocation of our children to leave space
// for the border and padding of the background actor.
this._background = new St.Bin({ style_class: 'workspace-thumbnails-background' });
this.actor.add_actor(this._background);
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.actor.add_actor(indicator);
this._targetScale = 0;
this._scale = 0;
this._pendingScaleUpdate = false;
this._stateUpdateQueued = false;
this._animatingIndicator = false;
this._indicatorY = 0; // only used when _animatingIndicator is true
this._stateCounts = {};
for (let key in ThumbnailState)
this._stateCounts[ThumbnailState[key]] = 0;
this._thumbnails = [];
},
show: function() {
this._switchWorkspaceNotifyId =
global.window_manager.connect('switch-workspace',
Lang.bind(this, this._activeWorkspaceChanged));
this._targetScale = 0;
this._scale = 0;
this._pendingScaleUpdate = false;
this._stateUpdateQueued = false;
this._stateCounts = {};
for (let key in ThumbnailState)
this._stateCounts[ThumbnailState[key]] = 0;
// The "porthole" is the portion of the screen that we show in the workspaces
let panelHeight = Main.panel.actor.height;
let monitor = Main.layoutManager.primaryMonitor;
this._porthole = {
x: monitor.x,
y: monitor.y + panelHeight,
width: monitor.width,
height: monitor.height - panelHeight
};
this.addThumbnails(0, global.screen.n_workspaces);
},
hide: function() {
if (this._switchWorkspaceNotifyId > 0) {
global.window_manager.disconnect(this._switchWorkspaceNotifyId);
this._switchWorkspaceNotifyId = 0;
}
for (let w = 0; w < this._thumbnails.length; w++)
this._thumbnails[w].destroy();
this._thumbnails = [];
},
addThumbnails: function(start, count) {
for (let k = start; k < start + count; k++) {
let metaWorkspace = global.screen.get_workspace_by_index(k);
let thumbnail = new WorkspaceThumbnail(metaWorkspace);
thumbnail.setPorthole(this._porthole.x, this._porthole.y,
this._porthole.width, this._porthole.height);
this._thumbnails.push(thumbnail);
this.actor.add_actor(thumbnail.actor);
if (start > 0) { // not the initial fill
thumbnail.state = ThumbnailState.NEW;
thumbnail.slidePosition = 1; // start slid out
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._indicator.raise_top();
},
removeThumbmails: function(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)
this._setThumbnailState(thumbnail, ThumbnailState.REMOVING);
currentPos++;
}
this._queueUpdateStates();
},
syncStacking: function(stackIndices) {
for (let i = 0; i < this._thumbnails.length; i++)
this._thumbnails[i].syncStacking(stackIndices);
},
set scale(scale) {
this._scale = scale;
this.actor.queue_relayout();
},
get scale() {
return this._scale;
},
set indicatorY(indicatorY) {
this._indicatorY = indicatorY;
this.actor.queue_relayout();
},
get indicatorY() {
return this._indicatorY;
},
_setThumbnailState: function(thumbnail, state) {
this._stateCounts[thumbnail.state]--;
thumbnail.state = state;
this._stateCounts[thumbnail.state]++;
},
_iterateStateThumbnails: function(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]);
}
},
_tweenScale: function() {
Tweener.addTween(this,
{ scale: this._targetScale,
time: RESCALE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: this._queueUpdateStates,
onCompleteScope: this });
},
_updateStates: function() {
this._stateUpdateQueued = false;
// If we are animating the indicator, wait
if (this._animatingIndicator)
return;
// Then slide out any thumbnails that have been destroyed
this._iterateStateThumbnails(ThumbnailState.REMOVING,
function(thumbnail) {
this._setThumbnailState(thumbnail, ThumbnailState.ANIMATING_OUT);
Tweener.addTween(thumbnail,
{ slidePosition: 1,
time: SLIDE_ANIMATION_TIME,
transition: 'linear',
onComplete: function() {
this._setThumbnailState(thumbnail, ThumbnailState.ANIMATED_OUT);
this._queueUpdateStates();
},
onCompleteScope: this
});
});
// 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 and collapse any removed thumbnails
this._iterateStateThumbnails(ThumbnailState.ANIMATED_OUT,
function(thumbnail) {
this.actor.set_skip_paint(thumbnail.actor, true);
this._setThumbnailState(thumbnail, ThumbnailState.COLLAPSING);
Tweener.addTween(thumbnail,
{ collapseFraction: 1,
time: RESCALE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this._stateCounts[thumbnail.state]--;
thumbnail.state = ThumbnailState.DESTROYED;
let index = this._thumbnails.indexOf(thumbnail);
this._thumbnails.splice(index, 1);
thumbnail.destroy();
this._queueUpdateStates();
},
onCompleteScope: this
});
});
if (this._pendingScaleUpdate) {
this._tweenScale();
this._pendingScaleUpdate = false;
}
// Wait until that's done
if (this._scale != this._targetScale || this._stateCounts[ThumbnailState.COLLAPSING] > 0)
return;
// And then slide in any new thumbnails
this._iterateStateThumbnails(ThumbnailState.NEW,
function(thumbnail) {
this._setThumbnailState(thumbnail, ThumbnailState.ANIMATING_IN);
Tweener.addTween(thumbnail,
{ slidePosition: 0,
time: SLIDE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this._setThumbnailState(thumbnail, ThumbnailState.NORMAL);
},
onCompleteScope: this
});
});
},
_queueUpdateStates: function() {
if (this._stateUpdateQueued)
return;
Meta.later_add(Meta.LaterType.BEFORE_REDRAW,
Lang.bind(this, this._updateStates));
this._stateUpdateQueued = true;
},
_getPreferredHeight: function(actor, forWidth, alloc) {
// See comment about this._background in _init()
let themeNode = this._background.get_theme_node();
forWidth = themeNode.adjust_for_width(forWidth);
// Note that for getPreferredWidth/Height 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.
if (this._thumbnails.length == 0)
return;
let spacing = this.actor.get_theme_node().get_length('spacing');
let nWorkspaces = global.screen.n_workspaces;
let totalSpacing = (nWorkspaces - 1) * spacing;
[alloc.min_size, alloc.natural_size] =
themeNode.adjust_preferred_height(totalSpacing,
totalSpacing + nWorkspaces * this._porthole.height * MAX_THUMBNAIL_SCALE);
},
_getPreferredWidth: function(actor, forHeight, alloc) {
// See comment about this._background in _init()
let themeNode = this._background.get_theme_node();
if (this._thumbnails.length == 0)
return;
// We don't animate our preferred width, which is always reported according
// to the actual number of current workspaces, we just animate within that
let spacing = this.actor.get_theme_node().get_length('spacing');
let nWorkspaces = global.screen.n_workspaces;
let totalSpacing = (nWorkspaces - 1) * spacing;
let avail = forHeight - totalSpacing;
let scale = (avail / nWorkspaces) / this._porthole.height;
scale = Math.min(scale, MAX_THUMBNAIL_SCALE);
let width = Math.round(this._porthole.width * scale);
[alloc.min_size, alloc.natural_size] =
themeNode.adjust_preferred_width(width, width);
},
_allocate: function(actor, box, flags) {
let rtl = (St.Widget.get_default_direction () == St.TextDirection.RTL);
// See comment about this._background in _init()
let themeNode = this._background.get_theme_node();
let contentBox = themeNode.get_content_box(box);
if (this._thumbnails.length == 0) // not visible
return;
let portholeWidth = this._porthole.width;
let portholeHeight = this._porthole.height;
let spacing = this.actor.get_theme_node().get_length('spacing');
// Compute the scale we'll need once everything is updated
let nWorkspaces = global.screen.n_workspaces;
let totalSpacing = (nWorkspaces - 1) * spacing;
let avail = (contentBox.y2 - contentBox.y1) - totalSpacing;
let newScale = (avail / nWorkspaces) / portholeHeight;
newScale = Math.min(newScale, MAX_THUMBNAIL_SCALE);
if (newScale != this._targetScale) {
if (this._targetScale > 0) {
// We don't do the tween 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();
}
let thumbnailHeight = portholeHeight * this._scale;
let thumbnailWidth = Math.round(portholeWidth * this._scale);
let roundedHScale = thumbnailWidth / portholeWidth;
let slideOffset; // X offset when thumbnail is fully slid offscreen
if (rtl)
slideOffset = - (thumbnailWidth + themeNode.get_padding(St.Side.LEFT));
else
slideOffset = thumbnailWidth + themeNode.get_padding(St.Side.RIGHT);
let childBox = new Clutter.ActorBox();
// The background is horizontally restricted to correspond to the current thumbnail size
// but otherwise covers the entire allocation
if (rtl) {
childBox.x1 = box.x1;
childBox.x2 = box.x2 - ((contentBox.x2 - contentBox.x1) - thumbnailWidth);
} else {
childBox.x1 = box.x1 + ((contentBox.x2 - contentBox.x1) - thumbnailWidth);
childBox.x2 = box.x2;
}
childBox.y1 = box.y1;
childBox.y2 = box.y2;
this._background.allocate(childBox, flags);
let indicatorY = this._indicatorY;
// when not animating, the workspace position overrides this._indicatorY
let indicatorWorkspace = !this._animatingIndicator ? global.screen.get_active_workspace() : null;
let y = contentBox.y1;
for (let i = 0; i < this._thumbnails.length; i++) {
let thumbnail = this._thumbnails[i];
if (i > 0)
y += spacing - Math.round(thumbnail.collapseFraction * spacing);
// We might end up with thumbnailHeight being something like 99.33
// pixels. To make this work and not end up with a gap at the bottom,
// we need some thumbnails to be 99 pixels and some 100 pixels height;
// we compute an actual scale separately for each thumbnail.
let y1 = Math.round(y);
let y2 = Math.round(y + thumbnailHeight);
let roundedVScale = (y2 - y1) / portholeHeight;
let x1, x2;
if (rtl) {
x1 = contentBox.x1 + slideOffset * thumbnail.slidePosition;
x2 = x1 + thumbnailWidth;
} else {
x1 = contentBox.x2 - thumbnailWidth + slideOffset * thumbnail.slidePosition;
x2 = x1 + thumbnailWidth;
}
if (thumbnail.metaWorkspace == indicatorWorkspace)
indicatorY = y1;
// Allocating a scaled actor is funny - x1/y1 correspond to the origin
// of the actor, but x2/y2 are increased by the *unscaled* size.
childBox.x1 = x1;
childBox.x2 = x1 + portholeWidth;
childBox.y1 = y1;
childBox.y2 = y1 + portholeHeight;
thumbnail.actor.set_scale(roundedHScale, roundedVScale);
thumbnail.actor.allocate(childBox, flags);
// 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
y += thumbnailHeight - Math.round(thumbnailHeight * thumbnail.collapseFraction);
}
if (rtl) {
childBox.x1 = contentBox.x1;
childBox.x2 = contentBox.x1 + thumbnailWidth;
} else {
childBox.x1 = contentBox.x2 - thumbnailWidth;
childBox.x2 = contentBox.x2;
}
childBox.y1 = indicatorY;
childBox.y2 = childBox.y1 + thumbnailHeight;
this._indicator.allocate(childBox, flags);
},
_activeWorkspaceChanged: function(wm, from, to, direction) {
let thumbnail;
let activeWorkspace = global.screen.get_active_workspace();
for (let i = 0; i < this._thumbnails.length; i++) {
if (this._thumbnails[i].metaWorkspace == activeWorkspace) {
thumbnail = this._thumbnails[i];
break;
}
}
this._animatingIndicator = true;
this.indicatorY = this._indicator.allocation.y1;
Tweener.addTween(this,
{ indicatorY: thumbnail.actor.allocation.y1,
time: WorkspacesView.WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this._animatingIndicator = false;
this._queueUpdateStates();
},
onCompleteScope: this
});
}
};