gnome-shell/js/ui/workspaceSwitcherPopup.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const { Clutter, GLib, GObject, Meta, St } = imports.gi;
const Mainloop = imports.mainloop;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
var ANIMATION_TIME = 0.1;
var DISPLAY_TIMEOUT = 600;
var WorkspaceSwitcherPopupList = GObject.registerClass(
class WorkspaceSwitcherPopupList extends St.Widget {
_init() {
super._init({ style_class: 'workspace-switcher' });
this._itemSpacing = 0;
this._childHeight = 0;
this._childWidth = 0;
this.connect('style-changed', () => {
this._itemSpacing = this.get_theme_node().get_length('spacing');
});
}
vfunc_get_preferred_height(forWidth) {
let workArea = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
let themeNode = this.get_theme_node();
let availHeight = workArea.height;
availHeight -= themeNode.get_vertical_padding();
let height = 0;
for (let child of this.get_children()) {
let [childMinHeight, childNaturalHeight] = child.get_preferred_height(-1);
let [childMinWidth, childNaturalWidth] = child.get_preferred_width(childNaturalHeight);
height += childNaturalHeight * workArea.width / workArea.height;
}
let workspaceManager = global.workspace_manager;
let spacing = this._itemSpacing * (workspaceManager.n_workspaces - 1);
height += spacing;
height = Math.min(height, availHeight);
this._childHeight = (height - spacing) / workspaceManager.n_workspaces;
return themeNode.adjust_preferred_height(height, height);
}
vfunc_get_preferred_width(forHeight) {
let workArea = Main.layoutManager.getWorkAreaForMonitor(Main.layoutManager.primaryIndex);
this._childWidth = Math.round(this._childHeight * workArea.width / workArea.height);
return [this._childWidth, this._childWidth];
}
vfunc_allocate(box, flags) {
this.set_allocation(box, flags);
let themeNode = this.get_theme_node();
box = themeNode.get_content_box(box);
let childBox = new Clutter.ActorBox();
let y = box.y1;
let prevChildBoxY2 = box.y1 - this._itemSpacing;
for (let child of this.get_children()) {
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;
child.allocate(childBox, flags);
}
}
});
var WorkspaceSwitcherPopup = GObject.registerClass(
class WorkspaceSwitcherPopup extends St.Widget {
_init() {
super._init({ x: 0,
y: 0,
width: global.screen_width,
height: global.screen_height,
style_class: 'workspace-switcher-group' });
Main.uiGroup.add_actor(this);
this._timeoutId = 0;
this._container = new St.BoxLayout({ style_class: 'workspace-switcher-container' });
this.add_child(this._container);
this._list = new WorkspaceSwitcherPopupList();
this._container.add_child(this._list);
this._redisplay();
this.hide();
let workspaceManager = global.workspace_manager;
this._workspaceManagerSignals = [];
this._workspaceManagerSignals.push(workspaceManager.connect('workspace-added',
this._redisplay.bind(this)));
this._workspaceManagerSignals.push(workspaceManager.connect('workspace-removed',
this._redisplay.bind(this)));
this.connect('destroy', this._onDestroy.bind(this));
}
_redisplay() {
let workspaceManager = global.workspace_manager;
this._list.destroy_all_children();
for (let i = 0; i < workspaceManager.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() {
Tweener.addTween(this._container, { opacity: 255,
time: ANIMATION_TIME,
transition: 'easeOutQuad'
});
this.show();
}
display(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, this._onTimeout.bind(this));
GLib.Source.set_name_by_id(this._timeoutId, '[gnome-shell] this._onTimeout');
this._show();
}
_onTimeout() {
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
Tweener.addTween(this._container, { opacity: 0.0,
time: ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete() { this.destroy(); },
onCompleteScope: this
});
return GLib.SOURCE_REMOVE;
}
_onDestroy() {
if (this._timeoutId)
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
let workspaceManager = global.workspace_manager;
for (let i = 0; i < this._workspaceManagerSignals.length; i++)
workspaceManager.disconnect(this._workspaceManagerSignals[i]);
this._workspaceManagerSignals = [];
}
});