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 Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Pango = imports.gi.Pango;
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 POPUP_ARROW_COLOR = new Clutter.Color();
POPUP_ARROW_COLOR.from_pixel(0xffffffff);
const POPUP_UNFOCUSED_ARROW_COLOR = new Clutter.Color();
POPUP_UNFOCUSED_ARROW_COLOR.from_pixel(0x808080ff);
const TRANSPARENT_COLOR = new Clutter.Color();
TRANSPARENT_COLOR.from_pixel(0x00000000);
const POPUP_APPICON_SIZE = 96;
const POPUP_LIST_SPACING = 8;
const DISABLE_HOVER_TIMEOUT = 500; // milliseconds
const THUMBNAIL_SIZE = 256;
const THUMBNAIL_POPUP_TIME = 500; // milliseconds
const THUMBNAIL_FADE_TIME = 0.2; // seconds
function mod(a, b) {
return (a + b) % b;
}
function AltTabPopup() {
this._init();
}
AltTabPopup.prototype = {
_init : function() {
this.actor = new Clutter.Group({ reactive: true,
x: 0,
y: 0,
width: global.screen_width,
height: global.screen_height });
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this._haveModal = false;
this._currentApp = 0;
this._currentWindow = 0;
this._thumbnailTimeoutId = 0;
this._motionTimeoutId = 0;
// Initially disable hover so we ignore the enter-event if
// the switcher appears underneath the current pointer location
this._disableHover();
global.stage.add_actor(this.actor);
},
show : function(backward) {
let tracker = Shell.WindowTracker.get_default();
let apps = tracker.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.actor.connect('button-press-event', Lang.bind(this, this._clickedOutside));
this.actor.connect('scroll-event', Lang.bind(this, this._onScroll));
this._appSwitcher = new AppSwitcher(apps);
this.actor.add_actor(this._appSwitcher.actor);
this._appSwitcher.connect('item-activated', Lang.bind(this, this._appActivated));
this._appSwitcher.connect('item-entered', Lang.bind(this, this._appEntered));
let primary = global.get_primary_monitor();
this._appSwitcher.actor.x = primary.x + Math.floor((primary.width - this._appSwitcher.actor.width) / 2);
this._appSwitcher.actor.y = primary.y + Math.floor((primary.height - this._appSwitcher.actor.height) / 2);
this._appIcons = this._appSwitcher.icons;
// Make the initial selection
if (this._appIcons.length == 1) {
if (!backward && this._appIcons[0].cachedWindows.length > 1) {
// For compatibility with the multi-app case below
this._select(0, 1, true);
} else
this._select(0);
} else if (backward) {
this._select(this._appIcons.length - 1);
} else {
let firstWindows = this._appIcons[0].cachedWindows;
if (firstWindows.length > 1) {
let curAppNextWindow = firstWindows[1];
let nextAppWindow = this._appIcons[1].cachedWindows[0];
// If the next window of the current app is more-recently-used
// than the first window of the next app, then select it.
if (curAppNextWindow.get_workspace() == global.screen.get_active_workspace() &&
curAppNextWindow.get_user_time() > nextAppWindow.get_user_time())
this._select(0, 1, true);
else
this._select(1);
} else
this._select(1);
}
// 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 updating
// selection.)
let mods = global.get_modifier_keys();
if (!(mods & Gdk.ModifierType.MOD1_MASK)) {
this._finish();
return false;
}
return true;
},
_nextApp : function() {
return mod(this._currentApp + 1, this._appIcons.length);
},
_previousApp : function() {
return mod(this._currentApp - 1, this._appIcons.length);
},
_nextWindow : function() {
return mod(this._currentWindow + 1,
this._appIcons[this._currentApp].cachedWindows.length);
},
_previousWindow : function() {
return mod(this._currentWindow - 1,
this._appIcons[this._currentApp].cachedWindows.length);
},
_keyPressEvent : function(actor, event) {
let keysym = event.get_key_symbol();
let shift = (Shell.get_event_state(event) & Clutter.ModifierType.SHIFT_MASK);
this._disableHover();
// The WASD stuff is for debugging in Xephyr, where the arrow
// keys aren't mapped correctly
if (keysym == Clutter.grave)
this._select(this._currentApp, shift ? this._previousWindow() : this._nextWindow());
else if (keysym == Clutter.Escape)
this.destroy();
else if (this._thumbnailsFocused) {
if (keysym == Clutter.Tab) {
if (shift && this._currentWindow == 0)
this._select(this._previousApp());
else if (!shift && this._currentWindow == this._appIcons[this._currentApp].cachedWindows.length - 1)
this._select(this._nextApp());
else
this._select(this._currentApp, shift ? this._previousWindow() : this._nextWindow());
} else if (keysym == Clutter.Left || keysym == Clutter.a)
this._select(this._currentApp, this._previousWindow());
else if (keysym == Clutter.Right || keysym == Clutter.d)
this._select(this._currentApp, this._nextWindow());
else if (keysym == Clutter.Up || keysym == Clutter.w)
this._select(this._currentApp, null, true);
} else {
if (keysym == Clutter.Tab)
this._select(shift ? this._previousApp() : this._nextApp());
else if (keysym == Clutter.Left || keysym == Clutter.a)
this._select(this._previousApp());
else if (keysym == Clutter.Right || keysym == Clutter.d)
this._select(this._nextApp());
else if (keysym == Clutter.Down || keysym == Clutter.s)
this._select(this._currentApp, this._currentWindow);
}
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;
},
_onScroll : function(actor, event) {
let direction = event.get_scroll_direction();
if (direction == Clutter.ScrollDirection.UP) {
if (this._thumbnailsFocused) {
if (this._currentWindow == 0)
this._select(this._previousApp());
else
this._select(this._currentApp, this._previousWindow());
} else {
let nwindows = this._appIcons[this._currentApp].cachedWindows.length;
if (nwindows > 1)
this._select(this._currentApp, nwindows - 1);
else
this._select(this._previousApp());
}
} else if (direction == Clutter.ScrollDirection.DOWN) {
if (this._thumbnailsFocused) {
if (this._currentWindow == this._appIcons[this._currentApp].cachedWindows.length - 1)
this._select(this._nextApp());
else
this._select(this._currentApp, this._nextWindow());
} else {
let nwindows = this._appIcons[this._currentApp].cachedWindows.length;
if (nwindows > 1)
this._select(this._currentApp, 0);
else
this._select(this._nextApp());
}
}
},
_clickedOutside : function(actor, event) {
this.destroy();
},
_appActivated : function(appSwitcher, n) {
// If the user clicks on the selected app, activate the
// selected window; otherwise (eg, they click on an app while
// !mouseActive) activate the first window of the clicked-on
// app.
let window = (n == this._currentApp) ? this._currentWindow : 0;
Main.activateWindow(this._appIcons[n].cachedWindows[window]);
this.destroy();
},
_appEntered : function(appSwitcher, n) {
if (!this._mouseActive)
return;
this._select(n);
},
_windowActivated : function(thumbnailList, n) {
Main.activateWindow(this._appIcons[this._currentApp].cachedWindows[n]);
this.destroy();
},
_windowEntered : function(thumbnailList, n) {
if (!this._mouseActive)
return;
this._select(this._currentApp, n);
},
_disableHover : function() {
this._mouseActive = false;
if (this._motionTimeoutId != 0)
Mainloop.source_remove(this._motionTimeoutId);
this._motionTimeoutId = Mainloop.timeout_add(DISABLE_HOVER_TIMEOUT, Lang.bind(this, this._mouseTimedOut));
},
_mouseTimedOut : function() {
this._motionTimeoutId = 0;
this._mouseActive = true;
},
_finish : function() {
let app = this._appIcons[this._currentApp];
let window = app.cachedWindows[this._currentWindow];
Main.activateWindow(window);
this.destroy();
},
destroy : function() {
this.actor.destroy();
},
_onDestroy : function() {
if (this._haveModal)
Main.popModal(this.actor);
if (this._keyPressEventId)
global.stage.disconnect(this._keyPressEventId);
if (this._keyReleaseEventId)
global.stage.disconnect(this._keyReleaseEventId);
if (this._motionTimeoutId != 0)
Mainloop.source_remove(this._motionTimeoutId);
if (this._thumbnailTimeoutId != 0)
Mainloop.source_remove(this._thumbnailTimeoutId);
},
/**
* _select:
* @app: index of the app to select
* @window: (optional) index of which of @app's windows to select
* @forceAppFocus: optional flag, see below
*
* Selects the indicated @app, and optional @window, and sets
* this._thumbnailsFocused appropriately to indicate whether the
* arrow keys should act on the app list or the thumbnail list.
*
* If @app is specified and @window is unspecified or %null, then
* the app is highlighted (ie, given a light background), and the
* current thumbnail list, if any, is destroyed. If @app has
* multiple windows, and @forceAppFocus is not %true, then a
* timeout is started to open a thumbnail list.
*
* If @app and @window are specified (and @forceAppFocus is not),
* then @app will be outlined, a thumbnail list will be created
* and focused (if it hasn't been already), and the @window'th
* window in it will be highlighted.
*
* If @app and @window are specified and @forceAppFocus is %true,
* then @app will be highlighted, and @window outlined, and the
* app list will have the keyboard focus.
*/
_select : function(app, window, forceAppFocus) {
if (app != this._currentApp || window == null) {
if (this._thumbnails)
this._destroyThumbnails();
}
if (this._thumbnailTimeoutId != 0) {
Mainloop.source_remove(this._thumbnailTimeoutId);
this._thumbnailTimeoutId = 0;
}
this._thumbnailsFocused = (window != null) && !forceAppFocus;
this._currentApp = app;
this._currentWindow = window ? window : 0;
this._appSwitcher.highlight(app, this._thumbnailsFocused);
if (window != null) {
if (!this._thumbnails)
this._createThumbnails();
this._currentWindow = window;
this._thumbnails.highlight(window, forceAppFocus);
} else if (this._appIcons[this._currentApp].cachedWindows.length > 1 &&
!forceAppFocus) {
this._thumbnailTimeoutId = Mainloop.timeout_add (
THUMBNAIL_POPUP_TIME,
Lang.bind(this, function () {
this._select(this._currentApp, 0, true);
return false;
}));
}
},
_destroyThumbnails : function() {
Tweener.addTween(this._thumbnails.actor,
{ opacity: 0,
time: THUMBNAIL_FADE_TIME,
transition: "easeOutQuad",
onComplete: function() { this.destroy(); }
});
this._thumbnails = null;
},
_createThumbnails : function() {
this._thumbnails = new ThumbnailList (this._appIcons[this._currentApp].cachedWindows);
this._thumbnails.connect('item-activated', Lang.bind(this, this._windowActivated));
this._thumbnails.connect('item-entered', Lang.bind(this, this._windowEntered));
this.actor.add_actor(this._thumbnails.actor);
let thumbnailCenter;
if (this._thumbnails.actor.width < this._appSwitcher.actor.width) {
// Center the thumbnails under the corresponding AppIcon.
// If this is being called when the switcher is first
// being brought up, then nothing will have been assigned
// an allocation yet, and the get_transformed_position()
// call will return 0,0.
// (http://bugzilla.openedhand.com/show_bug.cgi?id=1115).
// Calling clutter_actor_get_allocation_box() would force
// it to properly allocate itself, but we can't call that
// because it has an out-caller-allocates arg. So we use
// clutter_stage_get_actor_at_pos(), which will force a
// reallocation as a side effect.
global.stage.get_actor_at_pos(Clutter.PickMode.REACTIVE, 0, 0);
let icon = this._appIcons[this._currentApp].actor;
let [stageX, stageY] = icon.get_transformed_position();
thumbnailCenter = stageX + icon.width / 2;
} else {
// Center the thumbnails on the monitor
let primary = global.get_primary_monitor();
thumbnailCenter = primary.x + primary.width / 2;
}
this._thumbnails.actor.x = Math.floor(thumbnailCenter - this._thumbnails.actor.width / 2);
this._thumbnails.actor.y = this._appSwitcher.actor.y + this._appSwitcher.actor.height + POPUP_LIST_SPACING;
this._thumbnails.actor.opacity = 0;
Tweener.addTween(this._thumbnails.actor,
{ opacity: 255,
time: THUMBNAIL_FADE_TIME,
transition: "easeOutQuad"
});
}
};
function SwitcherList(squareItems) {
this._init(squareItems);
}
SwitcherList.prototype = {
_init : function(squareItems) {
this.actor = new St.Bin({ style_class: 'switcher-list' });
// Here we use a GenericContainer so that we can force all the
// children except the separator to have the same width.
this._list = new Shell.GenericContainer();
this._list.spacing = POPUP_LIST_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.actor.add_actor(this._list);
this._items = [];
this._highlighted = -1;
this._separator = null;
this._squareItems = squareItems;
},
addItem : function(item) {
let bbox = new St.Clickable({ style_class: 'item-box',
reactive: true });
bbox.set_child(item);
this._list.add_actor(bbox);
let n = this._items.length;
bbox.connect('clicked', Lang.bind(this, function () {
this._itemActivated(n);
}));
bbox.connect('enter-event', Lang.bind(this, function () {
this._itemEntered(n);
}));
this._items.push(bbox);
},
addSeparator: function () {
let box = new St.Bin({ style_class: 'separator' })
this._separator = box;
this._list.add_actor(box);
},
highlight: function(index, justOutline) {
if (this._highlighted != -1)
this._items[this._highlighted].style_class = 'item-box';
this._highlighted = index;
if (this._highlighted != -1) {
if (justOutline)
this._items[this._highlighted].style_class = 'outlined-item-box';
else
this._items[this._highlighted].style_class = 'selected-item-box';
}
},
_itemActivated: function(n) {
this.emit('item-activated', n);
},
_itemEntered: function(n) {
this.emit('item-entered', n);
},
_maxChildWidth: function (forHeight) {
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < this._items.length; i++) {
let [childMin, childNat] = this._items[i].get_preferred_width(forHeight);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
if (this._squareItems) {
let [childMin, childNat] = this._items[i].get_preferred_height(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
}
return [maxChildMin, maxChildNat];
},
_getPreferredWidth: function (actor, forHeight, alloc) {
let [maxChildMin, maxChildNat] = this._maxChildWidth(forHeight);
let separatorWidth = 0;
if (this._separator) {
let [sepMin, sepNat] = this._separator.get_preferred_width(forHeight);
separatorWidth = sepNat + this._list.spacing;
}
let totalSpacing = this._list.spacing * (this._items.length - 1);
alloc.min_size = this._items.length * maxChildMin + separatorWidth + totalSpacing;
alloc.nat_size = this._items.length * maxChildNat + separatorWidth + totalSpacing;
},
_getPreferredHeight: function (actor, forWidth, alloc) {
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < this._items.length; i++) {
let [childMin, childNat] = this._items[i].get_preferred_height(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
if (this._squareItems) {
let [childMin, childNat] = this._maxChildWidth(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
alloc.min_size = maxChildMin;
alloc.nat_size = maxChildNat;
},
_allocate: function (actor, box, flags) {
let childHeight = box.y2 - box.y1;
let [maxChildMin, maxChildNat] = this._maxChildWidth(childHeight);
let totalSpacing = this._list.spacing * (this._items.length - 1);
let separatorWidth = 0;
if (this._separator) {
let [sepMin, sepNat] = this._separator.get_preferred_width(childHeight);
separatorWidth = sepNat;
totalSpacing += this._list.spacing;
}
let childWidth = Math.floor(Math.max(0, box.x2 - box.x1 - totalSpacing - separatorWidth) / this._items.length);
let x = 0;
let children = this._list.get_children();
let childBox = new Clutter.ActorBox();
for (let i = 0; i < children.length; i++) {
if (this._items.indexOf(children[i]) != -1) {
let [childMin, childNat] = children[i].get_preferred_height(childWidth);
let vSpacing = (childHeight - childNat) / 2;
childBox.x1 = x;
childBox.y1 = vSpacing;
childBox.x2 = x + childWidth;
childBox.y2 = childBox.y1 + childNat;
children[i].allocate(childBox, flags);
x += this._list.spacing + childWidth;
} else if (children[i] == this._separator) {
// We want the separator to be more compact than the rest.
childBox.x1 = x;
childBox.y1 = 0;
childBox.x2 = x + separatorWidth;
childBox.y2 = childHeight;
children[i].allocate(childBox, flags);
x += this._list.spacing + separatorWidth;
} else {
// Something else, eg, AppSwitcher's arrows;
// we don't allocate it.
}
}
}
};
Signals.addSignalMethods(SwitcherList.prototype);
function AppIcon(app) {
this._init(app);
}
AppIcon.prototype = {
_init: function(app) {
this.app = app;
this.actor = new St.BoxLayout({ style_class: "alt-tab-app",
vertical: true });
this._icon = this.app.create_icon_texture(POPUP_APPICON_SIZE);
this.actor.add(this._icon, { x_fill: false, y_fill: false });
this._label = new St.Label({ text: this.app.get_name() });
this.actor.add(this._label, { x_fill: false });
}
}
function AppSwitcher(apps) {
this._init(apps);
}
AppSwitcher.prototype = {
__proto__ : SwitcherList.prototype,
_init : function(apps) {
SwitcherList.prototype._init.call(this, true);
// Construct the AppIcons, sort by time, add to the popup
let activeWorkspace = global.screen.get_active_workspace();
let workspaceIcons = [];
let otherIcons = [];
for (let i = 0; i < apps.length; i++) {
let appIcon = new AppIcon(apps[i]);
// Cache the window list now; we don't handle dynamic changes here,
// and we don't want to be continually retrieving it
appIcon.cachedWindows = appIcon.app.get_windows();
if (this._hasWindowsOnWorkspace(appIcon, activeWorkspace))
workspaceIcons.push(appIcon);
else
otherIcons.push(appIcon);
}
workspaceIcons.sort(Lang.bind(this, this._sortAppIcon));
otherIcons.sort(Lang.bind(this, this._sortAppIcon));
this.icons = [];
this._arrows = [];
for (let i = 0; i < workspaceIcons.length; i++)
this._addIcon(workspaceIcons[i]);
if (workspaceIcons.length > 0 && otherIcons.length > 0)
this.addSeparator();
for (let i = 0; i < otherIcons.length; i++)
this._addIcon(otherIcons[i]);
this._curApp = -1;
},
_allocate: function (actor, box, flags) {
// Allocate the main list items
SwitcherList.prototype._allocate.call(this, actor, box, flags);
let arrowHeight = Math.floor(this.actor.get_theme_node().get_padding(St.Side.BOTTOM) / 3);
let arrowWidth = arrowHeight * 2;
// Now allocate each arrow underneath its item
let childBox = new Clutter.ActorBox();
for (let i = 0; i < this._items.length; i++) {
let itemBox = this._items[i].allocation;
childBox.x1 = Math.floor(itemBox.x1 + (itemBox.x2 - itemBox.x1 - arrowWidth) / 2);
childBox.x2 = childBox.x1 + arrowWidth;
childBox.y1 = itemBox.y2 + arrowHeight;
childBox.y2 = childBox.y1 + arrowHeight;
this._arrows[i].allocate(childBox, flags);
}
},
// We override SwitcherList's highlight() method to also deal with
// the AppSwitcher->ThumbnailList arrows. Apps with only 1 window
// will hide their arrows by default, but show them when their
// thumbnails are visible (ie, when the app icon is supposed to be
// in justOutline mode). Apps with multiple windows will normally
// show a dim arrow, but show a bright arrow when they are
// highlighted; their redraw handler will use the right color
// based on this._curApp; we just need to do a queue_relayout() to
// force it to redraw. (queue_redraw() doesn't work because
// ShellDrawingArea only redraws on allocate.)
highlight : function(n, justOutline) {
if (this._curApp != -1) {
if (this.icons[this._curApp].cachedWindows.length == 1)
this._arrows[this._curApp].hide();
else
this._arrows[this._curApp].queue_relayout();
}
SwitcherList.prototype.highlight.call(this, n, justOutline);
this._curApp = n;
if (this._curApp != -1) {
if (justOutline && this.icons[this._curApp].cachedWindows.length == 1)
this._arrows[this._curApp].show();
else
this._arrows[this._curApp].queue_relayout();
}
},
_addIcon : function(appIcon) {
this.icons.push(appIcon);
this.addItem(appIcon.actor);
let n = this._arrows.length;
let arrow = new St.DrawingArea();
arrow.connect('redraw', Lang.bind(this,
function (area, texture) {
Shell.draw_box_pointer(texture, Shell.PointerDirection.DOWN,
TRANSPARENT_COLOR,
this._curApp == n ? POPUP_ARROW_COLOR : POPUP_UNFOCUSED_ARROW_COLOR);
}));
this._list.add_actor(arrow);
this._arrows.push(arrow);
if (appIcon.cachedWindows.length == 1)
arrow.hide();
},
_hasWindowsOnWorkspace: function(appIcon, workspace) {
let windows = appIcon.cachedWindows;
for (let i = 0; i < windows.length; i++) {
if (windows[i].get_workspace() == workspace)
return true;
}
return false;
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},
_sortAppIcon : function(appIcon1, appIcon2) {
return appIcon1.app.compare(appIcon2.app);
}
};
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function ThumbnailList(windows) {
this._init(windows);
}
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ThumbnailList.prototype = {
__proto__ : SwitcherList.prototype,
_init : function(windows) {
SwitcherList.prototype._init.call(this);
let activeWorkspace = global.screen.get_active_workspace();
// We fake the value of "separatorAdded" when the app has no window
// on the current workspace, to avoid displaying a useless separator in
// that case.
let separatorAdded = windows.length == 0 || windows[0].get_workspace() != activeWorkspace;
for (let i = 0; i < windows.length; i++) {
if (!separatorAdded && windows[i].get_workspace() != activeWorkspace) {
this.addSeparator();
separatorAdded = true;
}
let mutterWindow = windows[i].get_compositor_private();
let windowTexture = mutterWindow.get_texture ();
let [width, height] = windowTexture.get_size();
let scale = Math.min(1.0, THUMBNAIL_SIZE / width, THUMBNAIL_SIZE / height);
let box = new St.BoxLayout({ style_class: "thumbnail-box",
vertical: true });
let clone = new Clutter.Clone ({ source: windowTexture,
reactive: true,
width: width * scale,
height: height * scale });
box.add_actor(clone);
let title = windows[i].get_title();
if (title) {
let name = new St.Label({ text: title });
// St.Label doesn't support text-align so use a Bin
let bin = new St.Bin({ x_align: St.Align.MIDDLE });
bin.add_actor(name);
box.add_actor(bin);
}
this.addItem(box);
2009-09-21 13:04:30 -04:00
}
}
};