gnome-shell/js/ui/ctrlAltTab.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gdk = imports.gi.Gdk;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const AltTab = imports.ui.altTab;
const Main = imports.ui.main;
const Params = imports.misc.params;
const Tweener = imports.ui.tweener;
const POPUP_APPICON_SIZE = 96;
const POPUP_FADE_TIME = 0.1; // seconds
const SortGroup = {
TOP: 0,
MIDDLE: 1,
BOTTOM: 2
};
function CtrlAltTabManager() {
this._init();
}
CtrlAltTabManager.prototype = {
_init: function() {
this._items = [];
this._focusManager = St.FocusManager.get_for_stage(global.stage);
},
addGroup: function(root, name, icon, params) {
let item = Params.parse(params, { sortGroup: SortGroup.MIDDLE,
proxy: root,
focusCallback: null });
item.root = root;
item.name = name;
item.iconName = icon;
this._items.push(item);
root.connect('destroy', Lang.bind(this, function() { this.removeGroup(root); }));
this._focusManager.add_group(root);
},
removeGroup: function(root) {
this._focusManager.remove_group(root);
for (let i = 0; i < this._items.length; i++) {
if (this._items[i].root == root) {
this._items.splice(i, 1);
return;
}
}
},
focusGroup: function(item) {
if (global.stage_input_mode == Shell.StageInputMode.NONREACTIVE ||
global.stage_input_mode == Shell.StageInputMode.NORMAL)
global.set_stage_input_mode(Shell.StageInputMode.FOCUSED);
if (item.window)
Main.activateWindow(item.window);
else if (item.focusCallback)
item.focusCallback();
else
item.root.navigate_focus(null, Gtk.DirectionType.TAB_FORWARD, false);
},
// Sort the items into a consistent order; panel first, tray last,
// and everything else in between, sorted by X coordinate, so that
// they will have the same left-to-right ordering in the
// Ctrl-Alt-Tab dialog as they do onscreen.
_sortItems: function(a, b) {
if (a.sortGroup != b.sortGroup)
return a.sortGroup - b.sortGroup;
let y;
if (a.x == undefined) {
if (a.window)
a.x = a.window.get_compositor_private().x;
else
[a.x, y] = a.proxy.get_transformed_position();
}
if (b.x == undefined) {
if (b.window)
b.x = b.window.get_compositor_private().x;
else
[b.x, y] = b.proxy.get_transformed_position();
}
return a.x - b.x;
},
popup: function(backwards, mask) {
// Start with the set of focus groups that are currently mapped
let items = this._items.filter(function (item) { return item.proxy.mapped; });
// And add the windows metacity would show in its Ctrl-Alt-Tab list
if (!Main.overview.visible) {
let screen = global.screen;
let display = screen.get_display();
let windows = display.get_tab_list(Meta.TabList.DOCKS, screen, screen.get_active_workspace ());
let windowTracker = Shell.WindowTracker.get_default();
let textureCache = St.TextureCache.get_default();
for (let i = 0; i < windows.length; i++) {
let icon;
let app = windowTracker.get_window_app(windows[i]);
if (app)
icon = app.create_icon_texture(POPUP_APPICON_SIZE);
else
icon = textureCache.bind_pixbuf_property(windows[i], 'icon');
items.push({ window: windows[i],
name: windows[i].title,
iconActor: icon,
sortGroup: SortGroup.MIDDLE });
}
}
if (!items.length)
return;
items.sort(Lang.bind(this, this._sortItems));
if (!this._popup) {
this._popup = new CtrlAltTabPopup();
this._popup.show(items, backwards, mask);
this._popup.actor.connect('destroy',
Lang.bind(this, function() {
this._popup = null;
}));
}
}
};
function mod(a, b) {
return (a + b) % b;
}
function CtrlAltTabPopup() {
this._init();
}
CtrlAltTabPopup.prototype = {
_init : function() {
this.actor = new Shell.GenericContainer({ name: 'ctrlAltTabPopup',
reactive: true });
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.connect('destroy', Lang.bind(this, this._onDestroy));
this._haveModal = false;
this._modifierMask = 0;
this._selection = 0;
Main.uiGroup.add_actor(this.actor);
},
_getPreferredWidth: function (actor, forHeight, alloc) {
let primary = Main.layoutManager.primaryMonitor;
alloc.min_size = primary.width;
alloc.natural_size = primary.width;
},
_getPreferredHeight: function (actor, forWidth, alloc) {
let primary = Main.layoutManager.primaryMonitor;
alloc.min_size = primary.height;
alloc.natural_size = primary.height;
},
_allocate: function (actor, box, flags) {
let childBox = new Clutter.ActorBox();
let primary = Main.layoutManager.primaryMonitor;
let leftPadding = this.actor.get_theme_node().get_padding(St.Side.LEFT);
let vPadding = this.actor.get_theme_node().get_vertical_padding();
let hPadding = this.actor.get_theme_node().get_horizontal_padding();
let [childMinHeight, childNaturalHeight] = this._switcher.actor.get_preferred_height(primary.width - hPadding);
let [childMinWidth, childNaturalWidth] = this._switcher.actor.get_preferred_width(childNaturalHeight);
childBox.x1 = Math.max(primary.x + leftPadding, primary.x + Math.floor((primary.width - childNaturalWidth) / 2));
childBox.x2 = Math.min(primary.x + primary.width - hPadding, childBox.x1 + childNaturalWidth);
childBox.y1 = primary.y + Math.floor((primary.height - childNaturalHeight) / 2);
childBox.y2 = childBox.y1 + childNaturalHeight;
this._switcher.actor.allocate(childBox, flags);
},
show : function(items, startBackwards, mask) {
if (!Main.pushModal(this.actor))
return false;
this._haveModal = true;
this._modifierMask = AltTab.primaryModifier(mask);
this._keyPressEventId = this.actor.connect('key-press-event', Lang.bind(this, this._keyPressEvent));
this._keyReleaseEventId = this.actor.connect('key-release-event', Lang.bind(this, this._keyReleaseEvent));
this._items = items;
this._switcher = new CtrlAltTabSwitcher(items);
this.actor.add_actor(this._switcher.actor);
if (startBackwards)
this._selection = this._items.length - 1;
this._select(this._selection);
let [x, y, mods] = global.get_pointer();
if (!(mods & this._modifierMask)) {
this._finish();
return false;
}
this.actor.opacity = 0;
this.actor.show();
Tweener.addTween(this.actor,
{ opacity: 255,
time: POPUP_FADE_TIME,
transition: 'easeOutQuad'
});
return true;
},
_next : function() {
return mod(this._selection + 1, this._items.length);
},
_previous : function() {
return mod(this._selection - 1, this._items.length);
},
_keyPressEvent : function(actor, event) {
let keysym = event.get_key_symbol();
let shift = (Shell.get_event_state(event) & Clutter.ModifierType.SHIFT_MASK);
if (shift && keysym == Clutter.KEY_Tab)
keysym = Clutter.ISO_Left_Tab;
if (keysym == Clutter.KEY_Escape)
this.destroy();
else if (keysym == Clutter.KEY_Tab)
this._select(this._next());
else if (keysym == Clutter.KEY_ISO_Left_Tab)
this._select(this._previous());
else if (keysym == Clutter.KEY_Left)
this._select(this._previous());
else if (keysym == Clutter.KEY_Right)
this._select(this._next());
return true;
},
_keyReleaseEvent : function(actor, event) {
let [x, y, mods] = global.get_pointer();
let state = mods & this._modifierMask;
if (state == 0)
this._finish();
return true;
},
_finish : function() {
this.destroy();
Main.ctrlAltTabManager.focusGroup(this._items[this._selection]);
},
_popModal: function() {
if (this._haveModal) {
Main.popModal(this.actor);
this._haveModal = false;
}
},
destroy : function() {
this._popModal();
Tweener.addTween(this.actor,
{ opacity: 0,
time: POPUP_FADE_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this.actor.destroy();
})
});
},
_onDestroy : function() {
this._popModal();
if (this._keyPressEventId)
this.actor.disconnect(this._keyPressEventId);
if (this._keyReleaseEventId)
this.actor.disconnect(this._keyReleaseEventId);
},
_select : function(num) {
this._selection = num;
this._switcher.highlight(num);
}
};
function CtrlAltTabSwitcher(items) {
this._init(items);
}
CtrlAltTabSwitcher.prototype = {
__proto__ : AltTab.SwitcherList.prototype,
_init : function(items) {
AltTab.SwitcherList.prototype._init.call(this, true);
for (let i = 0; i < items.length; i++)
this._addIcon(items[i]);
},
_addIcon : function(item) {
let box = new St.BoxLayout({ style_class: 'alt-tab-app',
vertical: true });
let icon = item.iconActor;
if (!icon) {
icon = new St.Icon({ icon_name: item.iconName,
icon_type: St.IconType.SYMBOLIC,
icon_size: POPUP_APPICON_SIZE });
}
box.add(icon, { x_fill: false, y_fill: false } );
let text = new St.Label({ text: item.name });
box.add(text, { x_fill: false });
this.addItem(box, text);
}
};