gnome-shell/js/ui/altTab.js

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/* -*- 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 primaryModifier(mask) {
if (mask == 0)
return 0;
let primary = 1;
while (mask > 1) {
mask >>= 1;
primary <<= 1;
}
return primary;
}
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._modifierMask = 0;
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, mask) {
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._modifierMask = primaryModifier(mask);
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.opacity = 0;
this.actor.show();
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 & this._modifierMask)) {
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.opacity = 255;
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 & this._modifierMask;
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);
// Need to force an allocation so we can figure out whether we
// need to scroll when selecting
this._thumbnails.actor.get_allocation_box();
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 [absItemX, absItemY] = this._items[index].get_transformed_position();
let [result, posX, posY] = this.actor.transform_stage_point(absItemX, 0);
let [containerWidth, containerHeight] = this.actor.get_transformed_size();
if (posX + this._items[index].get_width() > containerWidth)
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;
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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;
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);
}
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}
},
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();
}