gnome-shell/js/ui/workspaceThumbnail.js
Ray Strode 3c8325f1f3 layout: rework background handling
This commit updates the code to use mutter's new background
api, and changes the shell's startup animation to be closer
to the mockups.

Based on initial work by Giovanni Campagna

https://bugzilla.gnome.org/show_bug.cgi?id=682429
2013-02-19 18:39:54 -05:00

1231 lines
46 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
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 Background = imports.ui.background;
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;
// 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.
const WORKSPACE_CUT_SIZE = 10;
const WORKSPACE_KEEP_ALIVE_TIME = 100;
const OVERRIDE_SCHEMA = 'org.gnome.shell.overrides';
const WindowClone = new Lang.Class({
Name: 'WindowClone',
_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-cancelled', Lang.bind(this, this._onDragCancelled));
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');
},
_onDragCancelled : function (draggable, time) {
this.emit('drag-cancelled');
},
_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
*/
const WorkspaceThumbnail = new Lang.Class({
Name: 'WorkspaceThumbnail',
_init : function(metaWorkspace) {
this.metaWorkspace = metaWorkspace;
this.monitorIndex = Main.layoutManager.primaryIndex;
this._removed = false;
this.actor = new St.Widget({ 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._createBackground();
let monitor = Main.layoutManager.primaryMonitor;
this.setPorthole(monitor.x, monitor.y, monitor.width, monitor.height);
let windows = global.get_window_actors().filter(Lang.bind(this, function(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 = [];
this._minimizedChangedIds = [];
for (let i = 0; i < windows.length; i++) {
let minimizedChangedId =
windows[i].meta_window.connect('notify::minimized',
Lang.bind(this,
this._updateMinimized));
this._allWindows.push(windows[i].meta_window);
this._minimizedChangedIds.push(minimizedChangedId);
if (this._isMyWindow(windows[i]) && 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
},
_createBackground: function() {
this._bgManager = new Background.BackgroundManager({ monitorIndex: Main.layoutManager.primaryIndex,
container: this._contents,
effects: Meta.BackgroundEffects.NONE });
},
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._bgManager.background.actor);
} 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);
clone.destroy();
},
_doAddWindow : function(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...
Mainloop.idle_add(Lang.bind(this,
function () {
if (!this._removed &&
metaWin.get_compositor_private() &&
metaWin.get_workspace() == this.metaWorkspace)
this._doAddWindow(metaWin);
return false;
}));
return;
}
if (this._allWindows.indexOf(metaWin) == -1) {
let minimizedChangedId = metaWin.connect('notify::minimized',
Lang.bind(this,
this._updateMinimized));
this._allWindows.push(metaWin);
this._minimizedChangedIds.push(minimizedChangedId);
}
// 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) || !this._isOverviewWindow(win))
return;
let clone = this._addWindowClone(win);
},
_windowAdded : function(metaWorkspace, metaWin) {
this._doAddWindow(metaWin);
},
_windowRemoved : function(metaWorkspace, metaWin) {
let index = this._allWindows.indexOf(metaWin);
if (index != -1) {
metaWin.disconnect(this._minimizedChangedIds[index]);
this._allWindows.splice(index, 1);
this._minimizedChangedIds.splice(index, 1);
}
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();
this._bgManager.destroy();
this._bgManager = null;
},
workspaceRemoved : function() {
if (this._removed)
return;
this._removed = true;
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._allWindows.length; i++)
this._allWindows[i].disconnect(this._minimizedChangedIds[i]);
},
_onDestroy: function(actor) {
this.workspaceRemoved();
this._windows = [];
this.actor = null;
},
// Tests if @actor belongs to this workspace and monitor
_isMyWindow : function (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 : 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, function(clone, time) {
this.activate(time);
}));
clone.connect('drag-begin',
Lang.bind(this, function(clone) {
Main.overview.beginWindowDrag();
}));
clone.connect('drag-cancelled',
Lang.bind(this, function(clone) {
Main.overview.cancelledWindowDrag();
}));
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._bgManager.actor);
else
clone.setStackAbove(this._windows[this._windows.length - 1].actor);
this._windows.push(clone);
return clone;
},
activate : function (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 used only by ThumbnailsBox
handleDragOverInternal : function(source, 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;
},
acceptDropInternal : function(source, 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);
const ThumbnailsBox = new Lang.Class({
Name: 'ThumbnailsBox',
_init: function() {
this.actor = new Shell.GenericContainer({ reactive: true,
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));
this.actor._delegate = this;
// 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._dropWorkspace = -1;
this._dropPlaceholderPos = -1;
this._dropPlaceholder = new St.Bin({ style_class: 'placeholder' });
this.actor.add_actor(this._dropPlaceholder);
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 = [];
this.actor.connect('button-press-event', function() { return true; });
this.actor.connect('button-release-event', Lang.bind(this, this._onButtonRelease));
this.actor.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
Main.overview.connect('showing',
Lang.bind(this, this._createThumbnails));
Main.overview.connect('hidden',
Lang.bind(this, this._destroyThumbnails));
Main.overview.connect('item-drag-begin',
Lang.bind(this, this._onDragBegin));
Main.overview.connect('item-drag-end',
Lang.bind(this, this._onDragEnd));
Main.overview.connect('item-drag-cancelled',
Lang.bind(this, this._onDragCancelled));
Main.overview.connect('window-drag-begin',
Lang.bind(this, this._onDragBegin));
Main.overview.connect('window-drag-end',
Lang.bind(this, this._onDragEnd));
Main.overview.connect('window-drag-cancelled',
Lang.bind(this, this._onDragCancelled));
this._settings = new Gio.Settings({ schema: OVERRIDE_SCHEMA });
this._settings.connect('changed::dynamic-workspaces',
Lang.bind(this, this._updateSwitcherVisibility));
},
_updateSwitcherVisibility: function() {
this.actor.visible =
this._settings.get_boolean('dynamic-workspaces') ||
global.screen.n_workspaces > 1;
},
_onButtonRelease: function(actor, event) {
let [stageX, stageY] = event.get_coords();
let [r, x, y] = this.actor.transform_stage_point(stageX, stageY);
for (let i = 0; i < this._thumbnails.length; i++) {
let thumbnail = this._thumbnails[i]
let [w, h] = thumbnail.actor.get_transformed_size();
if (y >= thumbnail.actor.y && y <= thumbnail.actor.y + h) {
thumbnail.activate(event.time);
break;
}
}
return true;
},
_onDragBegin: function() {
this._dragCancelled = false;
this._dragMonitor = {
dragMotion: Lang.bind(this, this._onDragMotion)
};
DND.addDragMonitor(this._dragMonitor);
},
_onDragEnd: function() {
if (this._dragCancelled)
return;
this._endDrag();
},
_onDragCancelled: function() {
this._dragCancelled = true;
this._endDrag();
},
_endDrag: function() {
this._clearDragPlaceholder();
DND.removeDragMonitor(this._dragMonitor);
},
_onDragMotion: function(dragEvent) {
if (!this.actor.contains(dragEvent.targetActor))
this._onLeave();
return DND.DragMotionResult.CONTINUE;
},
_onLeave: function() {
this._clearDragPlaceholder();
},
_clearDragPlaceholder: function() {
if (this._dropPlaceholderPos == -1)
return;
this._dropPlaceholderPos = -1;
this.actor.queue_relayout();
},
// Draggable target interface
handleDragOver : function(source, actor, x, y, time) {
if (!source.realWindow && !source.shellWorkspaceLaunch && source != Main.xdndHandler)
return DND.DragMotionResult.CONTINUE;
let canCreateWorkspaces = Meta.prefs_get_dynamic_workspaces();
let spacing = this.actor.get_theme_node().get_length('spacing');
this._dropWorkspace = -1;
let placeholderPos = -1;
let targetBase;
if (this._dropPlaceholderPos == 0)
targetBase = this._dropPlaceholder.y;
else
targetBase = this._thumbnails[0].actor.y;
let targetTop = targetBase - spacing - WORKSPACE_CUT_SIZE;
let length = this._thumbnails.length;
for (let i = 0; i < length; i ++) {
// Allow the reorder target to have a 10px "cut" into
// each side of the thumbnail, to make dragging onto the
// placeholder easier
let [w, h] = this._thumbnails[i].actor.get_transformed_size();
let targetBottom = targetBase + WORKSPACE_CUT_SIZE;
let nextTargetBase = targetBase + h + spacing;
let nextTargetTop = nextTargetBase - spacing - ((i == length - 1) ? 0: WORKSPACE_CUT_SIZE);
// Expand the target to include the placeholder, if it exists.
if (i == this._dropPlaceholderPos)
targetBottom += this._dropPlaceholder.get_height();
if (y > targetTop && y <= targetBottom && source != Main.xdndHandler && canCreateWorkspaces) {
placeholderPos = i;
break;
} else if (y > targetBottom && y <= nextTargetTop) {
this._dropWorkspace = i;
break
}
targetBase = nextTargetBase;
targetTop = nextTargetTop;
}
if (this._dropPlaceholderPos != placeholderPos) {
this._dropPlaceholderPos = placeholderPos;
this.actor.queue_relayout();
}
if (this._dropWorkspace != -1)
return this._thumbnails[this._dropWorkspace].handleDragOverInternal(source, time);
else if (this._dropPlaceholderPos != -1)
return source.realWindow ? DND.DragMotionResult.MOVE_DROP : DND.DragMotionResult.COPY_DROP;
else
return DND.DragMotionResult.CONTINUE;
},
acceptDrop: function(source, actor, x, y, time) {
if (this._dropWorkspace != -1) {
return this._thumbnails[this._dropWorkspace].acceptDropInternal(source, time);
} else if (this._dropPlaceholderPos != -1) {
if (!source.realWindow && !source.shellWorkspaceLaunch)
return false;
let isWindow = !!source.realWindow;
// To create a new workspace, we first slide all the windows on workspaces
// below us to the next workspace, leaving a blank workspace for us to recycle.
let newWorkspaceIndex;
[newWorkspaceIndex, this._dropPlaceholderPos] = [this._dropPlaceholderPos, -1];
// Nab all the windows below us.
let windows = global.get_window_actors().filter(function(win) {
if (isWindow)
return win.get_workspace() >= newWorkspaceIndex && win != source;
else
return win.get_workspace() >= newWorkspaceIndex;
});
// ... move them down one.
windows.forEach(function(win) {
win.meta_window.change_workspace_by_index(win.get_workspace() + 1,
true, time);
});
if (isWindow)
// ... and bam, a workspace, good as new.
source.metaWindow.change_workspace_by_index(newWorkspaceIndex,
true, time);
else if (source.shellWorkspaceLaunch) {
source.shellWorkspaceLaunch({ workspace: newWorkspaceIndex,
timestamp: time });
// 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.
Main.keepWorkspaceAlive(global.screen.get_workspace_by_index(newWorkspaceIndex),
WORKSPACE_KEEP_ALIVE_TIME);
}
return true;
} else {
return false;
}
},
_createThumbnails: function() {
this._switchWorkspaceNotifyId =
global.window_manager.connect('switch-workspace',
Lang.bind(this, this._activeWorkspaceChanged));
this._nWorkspacesNotifyId =
global.screen.connect('notify::n-workspaces',
Lang.bind(this, this._workspacesChanged));
this._syncStackingId =
Main.overview.connect('windows-restacked',
Lang.bind(this, this._syncStacking));
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
this._porthole = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
this.addThumbnails(0, global.screen.n_workspaces);
this._updateSwitcherVisibility();
},
_destroyThumbnails: function() {
if (this._switchWorkspaceNotifyId > 0) {
global.window_manager.disconnect(this._switchWorkspaceNotifyId);
this._switchWorkspaceNotifyId = 0;
}
if (this._nWorkspacesNotifyId > 0) {
global.screen.disconnect(this._nWorkspacesNotifyId);
this._nWorkspacesNotifyId = 0;
}
if (this._syncStackingId > 0) {
Main.overview.disconnect(this._syncStackingId);
this._syncStackingId = 0;
}
for (let w = 0; w < this._thumbnails.length; w++)
this._thumbnails[w].destroy();
this._thumbnails = [];
},
_workspacesChanged: function() {
let oldNumWorkspaces = this._thumbnails.length;
let newNumWorkspaces = global.screen.n_workspaces;
let active = global.screen.get_active_workspace_index();
if (newNumWorkspaces > oldNumWorkspaces) {
this.addThumbnails(oldNumWorkspaces, newNumWorkspaces - oldNumWorkspaces);
} else {
let removedIndex;
let removedNum = oldNumWorkspaces - newNumWorkspaces;
for (let w = 0; w < oldNumWorkspaces; w++) {
let metaWorkspace = global.screen.get_workspace_by_index(w);
if (this._thumbnails[w].metaWorkspace != metaWorkspace) {
removedIndex = w;
break;
}
}
this.removeThumbnails(removedIndex, removedNum);
}
this._updateSwitcherVisibility();
},
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();
},
removeThumbnails: 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) {
thumbnail.workspaceRemoved();
this._setThumbnailState(thumbnail, ThumbnailState.REMOVING);
}
currentPos++;
}
this._queueUpdateStates();
},
_syncStacking: function(overview, 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();
// 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 = (Clutter.get_default_text_direction () == Clutter.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 indicatorY1 = this._indicatorY;
let indicatorY2;
// when not animating, the workspace position overrides this._indicatorY
let indicatorWorkspace = !this._animatingIndicator ? global.screen.get_active_workspace() : null;
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 y = contentBox.y1;
if (this._dropPlaceholderPos == -1) {
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, Lang.bind(this, function() {
this._dropPlaceholder.hide();
}));
}
for (let i = 0; i < this._thumbnails.length; i++) {
let thumbnail = this._thumbnails[i];
if (i > 0)
y += spacing - Math.round(thumbnail.collapseFraction * spacing);
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 (i == this._dropPlaceholderPos) {
let [minHeight, placeholderHeight] = this._dropPlaceholder.get_preferred_height(-1);
childBox.x1 = x1;
childBox.x2 = x1 + thumbnailWidth;
childBox.y1 = Math.round(y);
childBox.y2 = Math.round(y + placeholderHeight);
this._dropPlaceholder.allocate(childBox, flags);
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, Lang.bind(this, function() {
this._dropPlaceholder.show();
}));
y += placeholderHeight + 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;
if (thumbnail.metaWorkspace == indicatorWorkspace) {
indicatorY1 = y1;
indicatorY2 = y2;
}
// 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.x1 -= indicatorLeftFullBorder;
childBox.x2 += indicatorRightFullBorder;
childBox.y1 = indicatorY1 - indicatorTopFullBorder;
childBox.y2 = (indicatorY2 ? indicatorY2 : (indicatorY1 + thumbnailHeight)) + indicatorBottomFullBorder;
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;
let indicatorThemeNode = this._indicator.get_theme_node();
let indicatorTopFullBorder = indicatorThemeNode.get_padding(St.Side.TOP) + indicatorThemeNode.get_border_width(St.Side.TOP);
this.indicatorY = this._indicator.allocation.y1 + indicatorTopFullBorder;
Tweener.addTween(this,
{ indicatorY: thumbnail.actor.allocation.y1,
time: WorkspacesView.WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this._animatingIndicator = false;
this._queueUpdateStates();
},
onCompleteScope: this
});
},
_onScrollEvent: function (actor, event) {
switch (event.get_scroll_direction()) {
case Clutter.ScrollDirection.UP:
Main.wm.actionMoveWorkspace(Meta.MotionDirection.UP);
break;
case Clutter.ScrollDirection.DOWN:
Main.wm.actionMoveWorkspace(Meta.MotionDirection.DOWN);
break;
}
}
});