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 Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const Main = imports.ui.main;
const SwitcherPopup = imports.ui.switcherPopup;
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
};
const CtrlAltTabManager = new Lang.Class({
Name: 'CtrlAltTabManager',
_init: function() {
this._items = [];
this.addGroup(global.window_group, _("Windows"),
'emblem-documents-symbolic', { sortGroup: SortGroup.TOP,
focusCallback: Lang.bind(this, this._focusWindows) });
},
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); }));
if (root instanceof St.Widget)
global.focus_manager.add_group(root);
},
removeGroup: function(root) {
if (root instanceof St.Widget)
global.focus_manager.remove_group(root);
for (let i = 0; i < this._items.length; i++) {
if (this._items[i].root == root) {
let item = this._items[i];
this._items.splice(i, 1);
return;
}
}
},
focusGroup: function(item, timestamp) {
if (item.focusCallback) {
item.focusCallback(timestamp);
} else {
if (global.stage_input_mode == Shell.StageInputMode.NONREACTIVE ||
global.stage_input_mode == Shell.StageInputMode.NORMAL)
global.set_stage_input_mode(Shell.StageInputMode.FOCUSED);
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 ax, bx, y;
[ax, y] = a.proxy.get_transformed_position();
[bx, y] = b.proxy.get_transformed_position();
return ax - bx;
},
popup: function(backward, binding, 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(items);
this._popup.show(backward, binding, mask);
this._popup.actor.connect('destroy',
Lang.bind(this, function() {
this._popup = null;
}));
}
},
_focusWindows: function(timestamp) {
global.set_stage_input_mode(Shell.StageInputMode.NORMAL);
global.stage.key_focus = null;
global.screen.focus_default_window(timestamp);
}
});
const CtrlAltTabPopup = new Lang.Class({
Name: 'CtrlAltTabPopup',
Extends: SwitcherPopup.SwitcherPopup,
_createSwitcher: function() {
this._switcherList = new CtrlAltTabSwitcher(this._items);
return true;
},
_initialSelection: function(backward, binding) {
if (binding == 'switch-panels') {
if (backward)
this._selectedIndex = this._items.length - 1;
} else if (binding == 'switch-panels-backward') {
if (!backward)
this._selectedIndex = this._items.length - 1;
}
this._select(this._selectedIndex);
},
_keyPressHandler: function(keysym, backwards, action) {
if (action == Meta.KeyBindingAction.SWITCH_PANELS)
this._select(backwards ? this._previous() : this._next());
else if (action == Meta.KeyBindingAction.SWITCH_PANELS_BACKWARD)
this._select(backwards ? this._next() : this._previous());
else if (keysym == Clutter.Left)
this._select(this._previous());
else if (keysym == Clutter.Right)
this._select(this._next());
},
_finish : function(time) {
this.parent(time);
Main.ctrlAltTabManager.focusGroup(this._items[this._selectedIndex], time);
},
});
const CtrlAltTabSwitcher = new Lang.Class({
Name: 'CtrlAltTabSwitcher',
Extends: SwitcherPopup.SwitcherList,
_init : function(items) {
this.parent(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_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);
}
});