gnome-shell/js/ui/altTab.js
Colin Walters 0af108211c apps: Ensure running apps override new .desktop file data
This patch fixes the "apps vanish from alt-TAB bug".

If a "package system" rips away and possibly replaces .desktop files
at some random time, we have historically used inotify to detect this
and reread state (in a racy way, but...).  In GNOME 2, this was
generally not too problematic because the menu widget was totally
separate from the list of windows - and the data they operate on was
disjoint as well.

In GNOME 3 we unify these, and this creates architectural problems
because the windows are tied to the app.

What this patch tries to do is, when rereading the application state,
if we have a running application, we keep that app around instead of
making a new instance.  This ensures we preserve any state such as the
set of open windows.

This requires moving the running state into ShellAppSystem.  Adjust
callers as necessary, and while we're at it drop the unused "contexts"
stuff.

This is just a somewhat quick band-aid; a REAL fix would require us
having low-level control over application installation.  As long as
we're on top of random broken tar+wget wrappers, it will be gross.

A slight future improvement to this patch would add an explicit
"merge" between the old and new data.  I think probably we always keep
around the ShellApp corresponding to a given ID, but replace its
GMenuTreeEntry.

https://bugzilla.gnome.org/show_bug.cgi?id=657990
2011-09-05 17:29:41 -04:00

1142 lines
45 KiB
JavaScript

/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Clutter = imports.gi.Clutter;
const Gdk = imports.gi.Gdk;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
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_APPICON_SIZE = 96;
const POPUP_SCROLL_TIME = 0.10; // seconds
const POPUP_DELAY_TIMEOUT = 150; // milliseconds
const POPUP_FADE_OUT_TIME = 0.1; // seconds
const APP_ICON_HOVER_TIMEOUT = 200; // milliseconds
const DISABLE_HOVER_TIMEOUT = 500; // milliseconds
const THUMBNAIL_DEFAULT_SIZE = 256;
const THUMBNAIL_POPUP_TIME = 500; // milliseconds
const THUMBNAIL_FADE_TIME = 0.1; // seconds
const iconSizes = [96, 64, 48, 32, 22];
function mod(a, b) {
return (a + b) % b;
}
function AltTabPopup() {
this._init();
}
AltTabPopup.prototype = {
_init : function() {
this.actor = new Shell.GenericContainer({ name: 'altTabPopup',
reactive: true,
visible: false });
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._currentApp = 0;
this._currentWindow = -1;
this._thumbnailTimeoutId = 0;
this._motionTimeoutId = 0;
this._initialDelayTimeoutId = 0;
this.thumbnailsVisible = false;
// Initially disable hover so we ignore the enter-event if
// the switcher appears underneath the current pointer location
this._disableHover();
Main.uiGroup.add_actor(this.actor);
},
_getPreferredWidth: function (actor, forHeight, alloc) {
alloc.min_size = global.screen_width;
alloc.natural_size = global.screen_width;
},
_getPreferredHeight: function (actor, forWidth, alloc) {
alloc.min_size = global.screen_height;
alloc.natural_size = global.screen_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 rightPadding = this.actor.get_theme_node().get_padding(St.Side.RIGHT);
let bottomPadding = this.actor.get_theme_node().get_padding(St.Side.BOTTOM);
let vPadding = this.actor.get_theme_node().get_vertical_padding();
let hPadding = leftPadding + rightPadding;
// Allocate the appSwitcher
// We select a size based on an icon size that does not overflow the screen
let [childMinHeight, childNaturalHeight] = this._appSwitcher.actor.get_preferred_height(primary.width - hPadding);
let [childMinWidth, childNaturalWidth] = this._appSwitcher.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 - rightPadding, childBox.x1 + childNaturalWidth);
childBox.y1 = primary.y + Math.floor((primary.height - childNaturalHeight) / 2);
childBox.y2 = childBox.y1 + childNaturalHeight;
this._appSwitcher.actor.allocate(childBox, flags);
// Allocate the thumbnails
// We try to avoid overflowing the screen so we base the resulting size on
// those calculations
if (this._thumbnails) {
let icon = this._appIcons[this._currentApp].actor;
let [posX, posY] = icon.get_transformed_position();
let thumbnailCenter = posX + icon.width / 2;
let [childMinWidth, childNaturalWidth] = this._thumbnails.actor.get_preferred_width(-1);
childBox.x1 = Math.max(primary.x + leftPadding, Math.floor(thumbnailCenter - childNaturalWidth / 2));
if (childBox.x1 + childNaturalWidth > primary.x + primary.width - hPadding) {
let offset = childBox.x1 + childNaturalWidth - primary.width + hPadding;
childBox.x1 = Math.max(primary.x + leftPadding, childBox.x1 - offset - hPadding);
}
let spacing = this.actor.get_theme_node().get_length('spacing');
childBox.x2 = childBox.x1 + childNaturalWidth;
if (childBox.x2 > primary.x + primary.width - rightPadding)
childBox.x2 = primary.x + primary.width - rightPadding;
childBox.y1 = this._appSwitcher.actor.allocation.y2 + spacing;
this._thumbnails.addClones(primary.height - bottomPadding - childBox.y1);
let [childMinHeight, childNaturalHeight] = this._thumbnails.actor.get_preferred_height(-1);
childBox.y2 = childBox.y1 + childNaturalHeight;
this._thumbnails.actor.allocate(childBox, flags);
}
},
show : function(backward, binding) {
let appSys = Shell.AppSystem.get_default();
let apps = appSys.get_running ();
if (!apps.length)
return false;
if (!Main.pushModal(this.actor))
return false;
this._haveModal = true;
this.actor.connect('key-press-event', Lang.bind(this, this._keyPressEvent));
this.actor.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);
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));
this._appIcons = this._appSwitcher.icons;
// Need to force an allocation so we can figure out whether we
// need to scroll when selecting
this.actor.get_allocation_box();
// Make the initial selection
if (binding == 'switch_group') {
if (backward) {
this._select(0, this._appIcons[0].cachedWindows.length - 1);
} else {
if (this._appIcons[0].cachedWindows.length > 1)
this._select(0, 1);
else
this._select(0, 0);
}
} else if (binding == 'switch_group_backward') {
this._select(0, this._appIcons[0].cachedWindows.length - 1);
} else if (binding == 'switch_windows_backward') {
this._select(this._appIcons.length - 1);
} else if (this._appIcons.length == 1) {
this._select(0);
} else if (backward) {
this._select(this._appIcons.length - 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 [x, y, mods] = global.get_pointer();
if (!(mods & Gdk.ModifierType.MOD1_MASK)) {
this._finish();
return false;
}
// We delay showing the popup so that fast Alt+Tab users aren't
// disturbed by the popup briefly flashing.
this._initialDelayTimeoutId = Mainloop.timeout_add(POPUP_DELAY_TIMEOUT,
Lang.bind(this, function () {
this.actor.show();
this._initialDelayTimeoutId = 0;
}));
return true;
},
_nextApp : function() {
return mod(this._currentApp + 1, this._appIcons.length);
},
_previousApp : function() {
return mod(this._currentApp - 1, this._appIcons.length);
},
_nextWindow : function() {
// We actually want the second window if we're in the unset state
if (this._currentWindow == -1)
this._currentWindow = 0;
return mod(this._currentWindow + 1,
this._appIcons[this._currentApp].cachedWindows.length);
},
_previousWindow : function() {
// Also assume second window here
if (this._currentWindow == -1)
this._currentWindow = 1;
return mod(this._currentWindow - 1,
this._appIcons[this._currentApp].cachedWindows.length);
},
_keyPressEvent : function(actor, event) {
let keysym = event.get_key_symbol();
let event_state = Shell.get_event_state(event);
let backwards = event_state & Clutter.ModifierType.SHIFT_MASK;
let action = global.display.get_keybinding_action(event.get_key_code(), event_state);
this._disableHover();
if (keysym == Clutter.Escape) {
this.destroy();
} else if (action == Meta.KeyBindingAction.SWITCH_GROUP) {
this._select(this._currentApp, backwards ? this._previousWindow() : this._nextWindow());
} else if (action == Meta.KeyBindingAction.SWITCH_GROUP_BACKWARD) {
this._select(this._currentApp, this._previousWindow());
} else if (action == Meta.KeyBindingAction.SWITCH_WINDOWS) {
this._select(backwards ? this._previousApp() : this._nextApp());
} else if (action == Meta.KeyBindingAction.SWITCH_WINDOWS_BACKWARD) {
this._select(this._previousApp());
} else if (this._thumbnailsFocused) {
if (keysym == Clutter.Left)
this._select(this._currentApp, this._previousWindow());
else if (keysym == Clutter.Right)
this._select(this._currentApp, this._nextWindow());
else if (keysym == Clutter.Up)
this._select(this._currentApp, null, true);
} else {
if (keysym == Clutter.Left)
this._select(this._previousApp());
else if (keysym == Clutter.Right)
this._select(this._nextApp());
else if (keysym == Clutter.Down)
this._select(this._currentApp, 0);
}
return true;
},
_keyReleaseEvent : function(actor, event) {
let [x, y, mods] = global.get_pointer();
let state = mods & Clutter.ModifierType.MOD1_MASK;
if (state == 0)
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._currentWindow == -1)
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 the clicked-on app.
if (n == this._currentApp) {
let window;
if (this._currentWindow >= 0)
window = this._appIcons[this._currentApp].cachedWindows[this._currentWindow];
else
window = null;
this._appIcons[this._currentApp].app.activate_window(window, global.get_current_time());
} else {
this._appIcons[n].app.activate_window(null, global.get_current_time());
}
this.destroy();
},
_appEntered : function(appSwitcher, n) {
if (!this._mouseActive)
return;
this._select(n);
},
_windowActivated : function(thumbnailList, n) {
let appIcon = this._appIcons[this._currentApp];
Main.activateWindow(appIcon.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];
if (this._currentWindow >= 0) {
Main.activateWindow(app.cachedWindows[this._currentWindow]);
} else {
app.app.activate_window(null, global.get_current_time());
}
this.destroy();
},
_popModal: function() {
if (this._haveModal) {
Main.popModal(this.actor);
this._haveModal = false;
}
},
destroy : function() {
this._popModal();
if (this.actor.visible) {
Tweener.addTween(this.actor,
{ opacity: 0,
time: POPUP_FADE_OUT_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this.actor.destroy();
})
});
} else
this.actor.destroy();
},
_onDestroy : function() {
this._popModal();
if (this._thumbnails)
this._destroyThumbnails();
if (this._motionTimeoutId != 0)
Mainloop.source_remove(this._motionTimeoutId);
if (this._thumbnailTimeoutId != 0)
Mainloop.source_remove(this._thumbnailTimeoutId);
if (this._initialDelayTimeoutId != 0)
Mainloop.source_remove(this._initialDelayTimeoutId);
},
/**
* _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 : -1;
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, this._timeoutPopupThumbnails));
}
},
_timeoutPopupThumbnails: function() {
if (!this._thumbnails)
this._createThumbnails();
this._thumbnailTimeoutId = 0;
this._thumbnailsFocused = false;
return false;
},
_destroyThumbnails : function() {
let thumbnailsActor = this._thumbnails.actor;
Tweener.addTween(thumbnailsActor,
{ opacity: 0,
time: THUMBNAIL_FADE_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function() {
thumbnailsActor.destroy();
this.thumbnailsVisible = false;
})
});
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);
this._thumbnails.actor.opacity = 0;
Tweener.addTween(this._thumbnails.actor,
{ opacity: 255,
time: THUMBNAIL_FADE_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function () { this.thumbnailsVisible = true; })
});
}
};
function SwitcherList(squareItems) {
this._init(squareItems);
}
SwitcherList.prototype = {
_init : function(squareItems) {
this.actor = new Shell.GenericContainer({ style_class: 'switcher-list' });
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._allocateTop));
// 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({ style_class: 'switcher-list-item-container' });
this._list.spacing = 0;
this._list.connect('style-changed', Lang.bind(this, function() {
this._list.spacing = this._list.get_theme_node().get_length('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._clipBin = new St.Bin({style_class: 'cbin'});
this._clipBin.child = this._list;
this.actor.add_actor(this._clipBin);
this._leftGradient = new St.BoxLayout({style_class: 'thumbnail-scroll-gradient-left', vertical: true});
this._rightGradient = new St.BoxLayout({style_class: 'thumbnail-scroll-gradient-right', vertical: true});
this.actor.add_actor(this._leftGradient);
this.actor.add_actor(this._rightGradient);
// Those arrows indicate whether scrolling in one direction is possible
this._leftArrow = new St.DrawingArea({ style_class: 'switcher-arrow',
pseudo_class: 'highlighted' });
this._leftArrow.connect('repaint', Lang.bind(this,
function() { _drawArrow(this._leftArrow, St.Side.LEFT); }));
this._rightArrow = new St.DrawingArea({ style_class: 'switcher-arrow',
pseudo_class: 'highlighted' });
this._rightArrow.connect('repaint', Lang.bind(this,
function() { _drawArrow(this._rightArrow, St.Side.RIGHT); }));
this.actor.add_actor(this._leftArrow);
this.actor.add_actor(this._rightArrow);
this._items = [];
this._highlighted = -1;
this._separator = null;
this._squareItems = squareItems;
this._minSize = 0;
this._scrollableRight = true;
this._scrollableLeft = false;
},
_allocateTop: function(actor, box, flags) {
let leftPadding = this.actor.get_theme_node().get_padding(St.Side.LEFT);
let rightPadding = this.actor.get_theme_node().get_padding(St.Side.RIGHT);
let childBox = new Clutter.ActorBox();
let scrollable = this._minSize > box.x2 - box.x1;
this._clipBin.allocate(box, flags);
childBox.x1 = 0;
childBox.y1 = 0;
childBox.x2 = this._leftGradient.width;
childBox.y2 = this.actor.height;
this._leftGradient.allocate(childBox, flags);
this._leftGradient.opacity = (this._scrollableLeft && scrollable) ? 255 : 0;
childBox.x1 = (this.actor.allocation.x2 - this.actor.allocation.x1) - this._rightGradient.width;
childBox.y1 = 0;
childBox.x2 = childBox.x1 + this._rightGradient.width;
childBox.y2 = this.actor.height;
this._rightGradient.allocate(childBox, flags);
this._rightGradient.opacity = (this._scrollableRight && scrollable) ? 255 : 0;
let arrowWidth = Math.floor(leftPadding / 3);
let arrowHeight = arrowWidth * 2;
childBox.x1 = leftPadding / 2;
childBox.y1 = this.actor.height / 2 - arrowWidth;
childBox.x2 = childBox.x1 + arrowWidth;
childBox.y2 = childBox.y1 + arrowHeight;
this._leftArrow.allocate(childBox, flags);
this._leftArrow.opacity = this._leftGradient.opacity;
arrowWidth = Math.floor(rightPadding / 3);
arrowHeight = arrowWidth * 2;
childBox.x1 = this.actor.width - arrowWidth - rightPadding / 2;
childBox.y1 = this.actor.height / 2 - arrowWidth;
childBox.x2 = childBox.x1 + arrowWidth;
childBox.y2 = childBox.y1 + arrowHeight;
this._rightArrow.allocate(childBox, flags);
this._rightArrow.opacity = this._rightGradient.opacity;
},
addItem : function(item, label) {
let bbox = new St.Button({ 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._onItemClicked(n); }));
bbox.connect('enter-event', Lang.bind(this, function() { this._onItemEnter(n); }));
bbox.label_actor = label;
this._items.push(bbox);
},
_onItemClicked: function (index) {
this._itemActivated(index);
},
_onItemEnter: function (index) {
this._itemEntered(index);
},
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].remove_style_pseudo_class('outlined');
this._items[this._highlighted].remove_style_pseudo_class('selected');
}
this._highlighted = index;
if (this._highlighted != -1) {
if (justOutline)
this._items[this._highlighted].add_style_pseudo_class('outlined');
else
this._items[this._highlighted].add_style_pseudo_class('selected');
}
let monitor = Main.layoutManager.primaryMonitor;
let itemSize = this._items[index].allocation.x2 - this._items[index].allocation.x1;
let [posX, posY] = this._items[index].get_transformed_position();
posX += this.actor.x;
if (posX + itemSize > monitor.width + monitor.x)
this._scrollToRight();
else if (posX < 0)
this._scrollToLeft();
},
_scrollToLeft : function() {
let x = this._items[this._highlighted].allocation.x1;
this._scrollableRight = true;
Tweener.addTween(this._list, { anchor_x: x,
time: POPUP_SCROLL_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function () {
if (this._highlighted == 0) {
this._scrollableLeft = false;
this.actor.queue_relayout();
}
})
});
},
_scrollToRight : function() {
this._scrollableLeft = true;
let monitor = Main.layoutManager.primaryMonitor;
let padding = this.actor.get_theme_node().get_horizontal_padding();
let parentPadding = this.actor.get_parent().get_theme_node().get_horizontal_padding();
let x = this._items[this._highlighted].allocation.x2 - monitor.width + padding + parentPadding;
Tweener.addTween(this._list, { anchor_x: x,
time: POPUP_SCROLL_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function () {
if (this._highlighted == this._items.length - 1) {
this._scrollableRight = false;
this.actor.queue_relayout();
}
})
});
},
_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.natural_size = alloc.min_size;
this._minSize = alloc.min_size;
},
_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 = maxChildMin;
}
alloc.min_size = maxChildMin;
alloc.natural_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();
let primary = Main.layoutManager.primaryMonitor;
let parentRightPadding = this.actor.get_parent().get_theme_node().get_padding(St.Side.RIGHT);
if (this.actor.allocation.x2 == primary.x + primary.width - parentRightPadding) {
if (this._squareItems)
childWidth = childHeight;
else {
let [childMin, childNat] = children[0].get_preferred_width(childHeight);
childWidth = childMin;
}
}
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.
}
}
let leftPadding = this.actor.get_theme_node().get_padding(St.Side.LEFT);
let rightPadding = this.actor.get_theme_node().get_padding(St.Side.RIGHT);
let topPadding = this.actor.get_theme_node().get_padding(St.Side.TOP);
let bottomPadding = this.actor.get_theme_node().get_padding(St.Side.BOTTOM);
// Clip the area for scrolling
this._clipBin.set_clip(0, -topPadding, (this.actor.allocation.x2 - this.actor.allocation.x1) - leftPadding - rightPadding, this.actor.height + bottomPadding);
}
};
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 = null;
this._iconBin = new St.Bin({ x_fill: true, y_fill: true });
this.actor.add(this._iconBin, { x_fill: false, y_fill: false } );
this.label = new St.Label({ text: this.app.get_name() });
this.actor.add(this.label, { x_fill: false });
},
set_size: function(size) {
this.icon = this.app.create_icon_texture(size);
this._iconBin.set_size(size, size);
this._iconBin.child = this.icon;
}
};
function AppSwitcher(apps, altTabPopup) {
this._init(apps, altTabPopup);
}
AppSwitcher.prototype = {
__proto__ : SwitcherList.prototype,
_init : function(apps, altTabPopup) {
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;
this._iconSize = 0;
this._altTabPopup = altTabPopup;
this._mouseTimeOutId = 0;
},
_getPreferredHeight: function (actor, forWidth, alloc) {
let j = 0;
while(this._items.length > 1 && this._items[j].style_class != 'item-box') {
j++;
}
let themeNode = this._items[j].get_theme_node();
let iconPadding = themeNode.get_horizontal_padding();
let iconBorder = themeNode.get_border_width(St.Side.LEFT) + themeNode.get_border_width(St.Side.RIGHT);
let [iconMinHeight, iconNaturalHeight] = this.icons[j].label.get_preferred_height(-1);
let iconSpacing = iconNaturalHeight + iconPadding + iconBorder;
let totalSpacing = this._list.spacing * (this._items.length - 1);
if (this._separator)
totalSpacing += this._separator.width + this._list.spacing;
// We just assume the whole screen here due to weirdness happing with the passed width
let primary = Main.layoutManager.primaryMonitor;
let parentPadding = this.actor.get_parent().get_theme_node().get_horizontal_padding();
let availWidth = primary.width - parentPadding - this.actor.get_theme_node().get_horizontal_padding();
let height = 0;
for(let i = 0; i < iconSizes.length; i++) {
this._iconSize = iconSizes[i];
height = iconSizes[i] + iconSpacing;
let w = height * this._items.length + totalSpacing;
if (w <= availWidth)
break;
}
if (this._items.length == 1) {
this._iconSize = iconSizes[0];
height = iconSizes[0] + iconSpacing;
}
for(let i = 0; i < this.icons.length; i++) {
if (this.icons[i].icon != null)
break;
this.icons[i].set_size(this._iconSize);
}
alloc.min_size = height;
alloc.natural_size = height;
},
_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 _onItemEnter method to delay
// activation when the thumbnail list is open
_onItemEnter: function (index) {
if (this._mouseTimeOutId != 0)
Mainloop.source_remove(this._mouseTimeOutId);
if (this._altTabPopup.thumbnailsVisible) {
this._mouseTimeOutId = Mainloop.timeout_add(APP_ICON_HOVER_TIMEOUT,
Lang.bind(this, function () {
this._enterItem(index);
this._mouseTimeOutId = 0;
return false;
}));
} else
this._itemEntered(index);
},
_enterItem: function(index) {
let [x, y, mask] = global.get_pointer();
let pickedActor = global.stage.get_actor_at_pos(Clutter.PickMode.ALL, x, y);
if (this._items[index].contains(pickedActor))
this._itemEntered(index);
},
// 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.
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].remove_style_pseudo_class('highlighted');
}
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].add_style_pseudo_class('highlighted');
}
},
_addIcon : function(appIcon) {
this.icons.push(appIcon);
this.addItem(appIcon.actor, appIcon.label);
let n = this._arrows.length;
let arrow = new St.DrawingArea({ style_class: 'switcher-arrow' });
arrow.connect('repaint', function() { _drawArrow(arrow, St.Side.BOTTOM); });
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;
},
_sortAppIcon : function(appIcon1, appIcon2) {
return appIcon1.app.compare(appIcon2.app);
}
};
function ThumbnailList(windows) {
this._init(windows);
}
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;
this._labels = new Array();
this._thumbnailBins = new Array();
this._clones = new Array();
this._windows = windows;
for (let i = 0; i < windows.length; i++) {
if (!separatorAdded && windows[i].get_workspace() != activeWorkspace) {
this.addSeparator();
separatorAdded = true;
}
let box = new St.BoxLayout({ style_class: 'thumbnail-box',
vertical: true });
let bin = new St.Bin({ style_class: 'thumbnail' });
box.add_actor(bin);
this._thumbnailBins.push(bin);
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 });
this._labels.push(bin);
bin.add_actor(name);
box.add_actor(bin);
this.addItem(box, name);
} else {
this.addItem(box, null);
}
}
},
addClones : function (availHeight) {
if (!this._thumbnailBins.length)
return;
let totalPadding = this._items[0].get_theme_node().get_horizontal_padding() + this._items[0].get_theme_node().get_vertical_padding();
totalPadding += this.actor.get_theme_node().get_horizontal_padding() + this.actor.get_theme_node().get_vertical_padding();
let [labelMinHeight, labelNaturalHeight] = this._labels[0].get_preferred_height(-1);
let spacing = this._items[0].child.get_theme_node().get_length('spacing');
availHeight = Math.min(availHeight - labelNaturalHeight - totalPadding - spacing, THUMBNAIL_DEFAULT_SIZE);
let binHeight = availHeight + this._items[0].get_theme_node().get_vertical_padding() + this.actor.get_theme_node().get_vertical_padding() - spacing;
binHeight = Math.min(THUMBNAIL_DEFAULT_SIZE, binHeight);
for (let i = 0; i < this._thumbnailBins.length; i++) {
let mutterWindow = this._windows[i].get_compositor_private();
if (!mutterWindow)
continue;
let windowTexture = mutterWindow.get_texture ();
let [width, height] = windowTexture.get_size();
let scale = Math.min(1.0, THUMBNAIL_DEFAULT_SIZE / width, availHeight / height);
let clone = new Clutter.Clone ({ source: windowTexture,
reactive: true,
width: width * scale,
height: height * scale });
this._thumbnailBins[i].set_height(binHeight);
this._thumbnailBins[i].add_actor(clone);
this._clones.push(clone);
}
// Make sure we only do this once
this._thumbnailBins = new Array();
}
};
function _drawArrow(area, side) {
let themeNode = area.get_theme_node();
let borderColor = themeNode.get_border_color(side);
let bodyColor = themeNode.get_foreground_color();
let [width, height] = area.get_surface_size ();
let cr = area.get_context();
cr.setLineWidth(1.0);
Clutter.cairo_set_source_color(cr, borderColor);
switch (side) {
case St.Side.TOP:
cr.moveTo(0, height);
cr.lineTo(Math.floor(width * 0.5), 0);
cr.lineTo(width, height);
break;
case St.Side.BOTTOM:
cr.moveTo(width, 0);
cr.lineTo(Math.floor(width * 0.5), height);
cr.lineTo(0, 0);
break;
case St.Side.LEFT:
cr.moveTo(width, height);
cr.lineTo(0, Math.floor(height * 0.5));
cr.lineTo(width, 0);
break;
case St.Side.RIGHT:
cr.moveTo(0, 0);
cr.lineTo(width, Math.floor(height * 0.5));
cr.lineTo(0, height);
break;
}
cr.strokePreserve();
Clutter.cairo_set_source_color(cr, bodyColor);
cr.fill();
}