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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const GLib = imports.gi.GLib;
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 Main = imports.ui.main;
const Tweener = imports.ui.tweener;
const ANIMATION_TIME = 0.1;
const DISPLAY_TIMEOUT = 600;
const WorkspaceSwitcherPopup = new Lang.Class({
Name: 'WorkspaceSwitcherPopup',
_init : function() {
this.actor = new St.Widget({ reactive: true,
x: 0,
y: 0,
width: global.screen_width,
height: global.screen_height,
style_class: 'workspace-switcher-group' });
Main.uiGroup.add_actor(this.actor);
this._container = new St.BoxLayout({ style_class: 'workspace-switcher-container' });
this._list = new Shell.GenericContainer({ style_class: 'workspace-switcher' });
this._itemSpacing = 0;
this._childHeight = 0;
this._childWidth = 0;
this._list.connect('style-changed', Lang.bind(this, function() {
this._itemSpacing = this._list.get_theme_node().get_length('spacing');
}));
this._list.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this._list.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this._list.connect('allocate', Lang.bind(this, this._allocate));
this._container.add(this._list);
this.actor.add_actor(this._container);
this._redisplay();
this.actor.hide();
this._globalSignals = [];
this._globalSignals.push(global.screen.connect('workspace-added', Lang.bind(this, this._redisplay)));
this._globalSignals.push(global.screen.connect('workspace-removed', Lang.bind(this, this._redisplay)));
this._timeoutId = Mainloop.timeout_add(DISPLAY_TIMEOUT, Lang.bind(this, this._onTimeout));
GLib.Source.set_name_by_id(this._timeoutId, '[gnome-shell] this._onTimeout');
},
_getPreferredHeight : function (actor, forWidth, alloc) {
let children = this._list.get_children();
let workArea = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
let availHeight = workArea.height;
availHeight -= this.actor.get_theme_node().get_vertical_padding();
availHeight -= this._container.get_theme_node().get_vertical_padding();
availHeight -= this._list.get_theme_node().get_vertical_padding();
let height = 0;
for (let i = 0; i < children.length; i++) {
let [childMinHeight, childNaturalHeight] = children[i].get_preferred_height(-1);
let [childMinWidth, childNaturalWidth] = children[i].get_preferred_width(childNaturalHeight);
height += childNaturalHeight * workArea.width / workArea.height;
}
let spacing = this._itemSpacing * (global.screen.n_workspaces - 1);
height += spacing;
height = Math.min(height, availHeight);
this._childHeight = (height - spacing) / global.screen.n_workspaces;
alloc.min_size = height;
alloc.natural_size = height;
},
_getPreferredWidth : function (actor, forHeight, alloc) {
let workArea = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
this._childWidth = Math.round(this._childHeight * workArea.width / workArea.height);
alloc.min_size = this._childWidth;
alloc.natural_size = this._childWidth;
},
_allocate : function (actor, box, flags) {
let children = this._list.get_children();
let childBox = new Clutter.ActorBox();
let y = box.y1;
let prevChildBoxY2 = box.y1 - this._itemSpacing;
for (let i = 0; i < children.length; i++) {
childBox.x1 = box.x1;
childBox.x2 = box.x1 + this._childWidth;
childBox.y1 = prevChildBoxY2 + this._itemSpacing;
childBox.y2 = Math.round(y + this._childHeight);
y += this._childHeight + this._itemSpacing;
prevChildBoxY2 = childBox.y2;
children[i].allocate(childBox, flags);
}
},
_redisplay: function() {
this._list.destroy_all_children();
for (let i = 0; i < global.screen.n_workspaces; i++) {
let indicator = null;
if (i == this._activeWorkspaceIndex && this._direction == Meta.MotionDirection.UP)
indicator = new St.Bin({ style_class: 'ws-switcher-active-up' });
else if(i == this._activeWorkspaceIndex && this._direction == Meta.MotionDirection.DOWN)
indicator = new St.Bin({ style_class: 'ws-switcher-active-down' });
else
indicator = new St.Bin({ style_class: 'ws-switcher-box' });
this._list.add_actor(indicator);
}
let workArea = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
let [containerMinHeight, containerNatHeight] = this._container.get_preferred_height(global.screen_width);
let [containerMinWidth, containerNatWidth] = this._container.get_preferred_width(containerNatHeight);
this._container.x = workArea.x + Math.floor((workArea.width - containerNatWidth) / 2);
this._container.y = workArea.y + Math.floor((workArea.height - containerNatHeight) / 2);
},
_show : function() {
Tweener.addTween(this._container, { opacity: 255,
time: ANIMATION_TIME,
transition: 'easeOutQuad'
});
this.actor.show();
},
display : function(direction, activeWorkspaceIndex) {
this._direction = direction;
this._activeWorkspaceIndex = activeWorkspaceIndex;
this._redisplay();
if (this._timeoutId != 0)
Mainloop.source_remove(this._timeoutId);
this._timeoutId = Mainloop.timeout_add(DISPLAY_TIMEOUT, Lang.bind(this, this._onTimeout));
GLib.Source.set_name_by_id(this._timeoutId, '[gnome-shell] this._onTimeout');
this._show();
},
_onTimeout : function() {
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
Tweener.addTween(this._container, { opacity: 0.0,
time: ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() { this.destroy(); },
onCompleteScope: this
});
return GLib.SOURCE_REMOVE;
},
destroy: function() {
if (this._timeoutId)
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
for (let i = 0; i < this._globalSignals.length; i++)
global.screen.disconnect(this._globalSignals[i]);
this.actor.destroy();
this.emit('destroy');
}
});
Signals.addSignalMethods(WorkspaceSwitcherPopup.prototype);
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