gnome-shell/js/ui/altTab.js

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/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Big = imports.gi.Big;
const Clutter = imports.gi.Clutter;
const Gdk = imports.gi.Gdk;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Pango = imports.gi.Pango;
const Shell = imports.gi.Shell;
const AppIcon = imports.ui.appIcon;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const POPUP_BG_COLOR = new Clutter.Color();
POPUP_BG_COLOR.from_pixel(0x00000080);
const POPUP_APPICON_BORDER_COLOR = new Clutter.Color();
POPUP_APPICON_BORDER_COLOR.from_pixel(0xffffffff);
const POPUP_APPS_BOX_SPACING = 8;
const POPUP_ICON_SIZE = 48;
const POPUP_POINTER_SELECTION_THRESHOLD = 3;
function AltTabPopup() {
this._init();
}
AltTabPopup.prototype = {
_init : function() {
this.actor = new Big.Box({ background_color : POPUP_BG_COLOR,
corner_radius: POPUP_APPS_BOX_SPACING,
padding: POPUP_APPS_BOX_SPACING,
spacing: POPUP_APPS_BOX_SPACING,
orientation: Big.BoxOrientation.VERTICAL,
reactive: true });
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this._appsBox = new Big.Box({ spacing: POPUP_APPS_BOX_SPACING,
orientation: Big.BoxOrientation.HORIZONTAL });
let gcenterbox = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL,
x_align: Big.BoxAlignment.CENTER });
gcenterbox.append(this._appsBox, Big.BoxPackFlags.NONE);
this.actor.append(gcenterbox, Big.BoxPackFlags.NONE);
this._icons = [];
this._currentWindows = [];
this._haveModal = false;
this._selected = 0;
this._highlightedWindow = null;
this._toplevels = global.window_group.get_children();
global.stage.add_actor(this.actor);
},
_addIcon : function(appIcon) {
appIcon.connect('activate', Lang.bind(this, this._appClicked));
appIcon.connect('activate-window', Lang.bind(this, this._windowClicked));
appIcon.connect('highlight-window', Lang.bind(this, this._windowHovered));
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appIcon.connect('menu-popped-up', Lang.bind(this, this._menuPoppedUp));
appIcon.connect('menu-popped-down', Lang.bind(this, this._menuPoppedDown));
appIcon.actor.connect('enter-event', Lang.bind(this, this._iconEntered));
// FIXME?
appIcon.actor.border = 2;
appIcon.highlight_border_color = POPUP_APPICON_BORDER_COLOR;
this._icons.push(appIcon);
this._currentWindows.push(appIcon.windows[0]);
this._appsBox.append(appIcon.actor, Big.BoxPackFlags.NONE);
},
show : function(initialSelection) {
let appMonitor = Shell.AppMonitor.get_default();
let apps = appMonitor.get_running_apps ("");
if (!apps.length)
return false;
if (!Main.pushModal(this.actor))
return false;
this._haveModal = true;
this._keyPressEventId = global.stage.connect('key-press-event', Lang.bind(this, this._keyPressEvent));
this._keyReleaseEventId = global.stage.connect('key-release-event', Lang.bind(this, this._keyReleaseEvent));
this._motionEventId = this.actor.connect('motion-event', Lang.bind(this, this._mouseMoved));
this._mouseActive = false;
this._mouseMovement = 0;
// Contruct the AppIcons, sort by time, add to the popup
let icons = [];
for (let i = 0; i < apps.length; i++)
icons.push(new AppIcon.AppIcon(apps[i], AppIcon.MenuType.BELOW, false));
icons.sort(Lang.bind(this, this._sortAppIcon));
for (let i = 0; i < icons.length; i++)
this._addIcon(icons[i]);
// Need to specify explicit width and height because the
// window_group may not actually cover the whole screen
this._lightbox = new Lightbox.Lightbox(global.window_group,
global.screen_width,
global.screen_height);
this.actor.show_all();
this.actor.x = Math.floor((global.screen_width - this.actor.width) / 2);
this.actor.y = Math.floor((global.screen_height - this.actor.height) / 2);
this._updateSelection(initialSelection);
// There's a race condition; if the user released Alt before
// we got the grab, then we won't be notified. (See
// https://bugzilla.gnome.org/show_bug.cgi?id=596695 for
// details.) So we check now. (Have to do this after calling
// _updateSelection.)
let [screen, x, y, mods] = Gdk.Display.get_default().get_pointer();
if (!(mods & Gdk.ModifierType.MOD1_MASK)) {
this._finish();
return false;
}
return true;
},
_hasVisibleWindows : function(appIcon) {
for (let i = 0; i < appIcon.windows.length; i++) {
if (appIcon.windows[i].showing_on_its_workspace())
return true;
}
return false;
},
_sortAppIcon : function(appIcon1, appIcon2) {
let vis1 = this._hasVisibleWindows(appIcon1);
let vis2 = this._hasVisibleWindows(appIcon2);
if (vis1 && !vis2) {
return -1;
} else if (vis2 && !vis1) {
return 1;
} else {
// The app's most-recently-used window is first
// in its list
return (appIcon2.windows[0].get_user_time() -
appIcon1.windows[0].get_user_time());
}
},
_keyPressEvent : function(actor, event) {
let keysym = event.get_key_symbol();
let backwards = (event.get_state() & Clutter.ModifierType.SHIFT_MASK);
if (keysym == Clutter.Tab)
this._updateSelection(backwards ? -1 : 1);
else if (keysym == Clutter.Left)
this._updateSelection(-1);
else if (keysym == Clutter.Right)
this._updateSelection(1);
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else if (keysym == Clutter.grave)
this._updateWindowSelection(backwards ? -1 : 1);
else if (keysym == Clutter.Up)
this._updateWindowSelection(-1);
else if (keysym == Clutter.Down)
this._updateWindowSelection(1);
else if (keysym == Clutter.Escape)
this.destroy();
return true;
},
_keyReleaseEvent : function(actor, event) {
let keysym = event.get_key_symbol();
if (keysym == Clutter.Alt_L || keysym == Clutter.Alt_R)
this._finish();
return true;
},
_appClicked : function(icon) {
Main.activateWindow(icon.windows[0]);
this.destroy();
},
_windowClicked : function(icon, window) {
if (window)
Main.activateWindow(window);
this.destroy();
},
_windowHovered : function(icon, window) {
if (window)
this._highlightWindow(window);
},
_mouseMoved : function(actor, event) {
if (++this._mouseMovement < POPUP_POINTER_SELECTION_THRESHOLD)
return;
this.actor.disconnect(this._motionEventId);
this._mouseActive = true;
actor = event.get_source();
while (actor) {
if (actor._delegate instanceof AppIcon.AppIcon) {
this._iconEntered(actor, event);
return;
}
actor = actor.get_parent();
}
},
_iconEntered : function(actor, event) {
let index = this._icons.indexOf(actor._delegate);
if (this._mouseActive)
this._updateSelection(index - this._selected);
},
_finish : function() {
if (this._highlightedWindow)
Main.activateWindow(this._highlightedWindow);
this.destroy();
},
destroy : function() {
this.actor.destroy();
},
_onDestroy : function() {
if (this._haveModal)
Main.popModal(this.actor);
if (this._lightbox)
this._lightbox.destroy();
if (this._keyPressEventId)
global.stage.disconnect(this._keyPressEventId);
if (this._keyReleaseEventId)
global.stage.disconnect(this._keyReleaseEventId);
},
_updateSelection : function(delta) {
this._icons[this._selected].setHighlight(false);
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if (delta != 0 && this._selectedMenu)
this._selectedMenu.popdown();
this._selected = (this._selected + this._icons.length + delta) % this._icons.length;
this._icons[this._selected].setHighlight(true);
this._highlightWindow(this._currentWindows[this._selected]);
},
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_menuPoppedUp : function(icon, menu) {
this._selectedMenu = menu;
},
_menuPoppedDown : function(icon, menu) {
this._selectedMenu = null;
},
_updateWindowSelection : function(delta) {
let icon = this._icons[this._selected];
if (!this._selectedMenu)
icon.popupMenu();
if (!this._selectedMenu)
return;
let next = 0;
for (let i = 0; i < icon.windows.length; i++) {
if (icon.windows[i] == this._highlightedWindow) {
next = (i + icon.windows.length + delta) % icon.windows.length;
break;
}
}
this._selectedMenu.selectWindow(icon.windows[next]);
},
_highlightWindow : function(metaWin) {
this._highlightedWindow = metaWin;
this._currentWindows[this._selected] = metaWin;
this._lightbox.highlight(this._highlightedWindow.get_compositor_private());
}
};