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dash.js
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dash.js
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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Signals = imports.signals;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const Mainloop = imports.mainloop;
const AppDisplay = imports.ui.appDisplay;
const AppFavorites = imports.ui.appFavorites;
const Dash = imports.ui.dash;
const DND = imports.ui.dnd;
const IconGrid = imports.ui.iconGrid;
const Main = imports.ui.main;
const PopupMenu = imports.ui.popupMenu;
const Tweener = imports.ui.tweener;
const Util = imports.misc.util;
const Workspace = imports.ui.workspace;
const Me = imports.misc.extensionUtils.getCurrentExtension();
const Convenience = Me.imports.convenience;
const AppIcons = Me.imports.appIcons;
let DASH_ANIMATION_TIME = Dash.DASH_ANIMATION_TIME;
let DASH_ITEM_LABEL_HIDE_TIME = Dash.DASH_ITEM_LABEL_HIDE_TIME;
let DASH_ITEM_HOVER_TIMEOUT = Dash.DASH_ITEM_HOVER_TIMEOUT;
/**
* Extend DashItemContainer
*
* - Pass settings to the constructor
* - set label position based on dash orientation
*
* I can't subclass the original object because of this: https://bugzilla.gnome.org/show_bug.cgi?id=688973.
* thus use this ugly pattern.
*/
function extendDashItemContainer(dashItemContainer, settings) {
dashItemContainer._dtdSettings = settings;
dashItemContainer.showLabel = AppIcons.itemShowLabel;
}
/**
* This class is a fork of the upstream DashActor class (ui.dash.js)
*
* Summary of changes:
* - passed settings to class as parameter
* - modified chldBox calculations for when 'show-apps-at-top' option is checked
* - handle horizontal dash
*/
const MyDashActor = new Lang.Class({
Name: 'DashToDock.MyDashActor',
_init: function(settings) {
// a prefix is required to avoid conflicting with the parent class variable
this._dtdSettings = settings;
this._rtl = (Clutter.get_default_text_direction() == Clutter.TextDirection.RTL);
this._position = Convenience.getPosition(settings);
this._isHorizontal = ((this._position == St.Side.TOP) ||
(this._position == St.Side.BOTTOM));
let layout = new Clutter.BoxLayout({
orientation: this._isHorizontal ? Clutter.Orientation.HORIZONTAL : Clutter.Orientation.VERTICAL
});
this.actor = new Shell.GenericContainer({
name: 'dash',
layout_manager: layout,
clip_to_allocation: true
});
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._delegate = this;
},
_allocate: function(actor, box, flags) {
let contentBox = box;
let availWidth = contentBox.x2 - contentBox.x1;
let availHeight = contentBox.y2 - contentBox.y1;
let [appIcons, showAppsButton] = actor.get_children();
let [showAppsMinHeight, showAppsNatHeight] = showAppsButton.get_preferred_height(availWidth);
let [showAppsMinWidth, showAppsNatWidth] = showAppsButton.get_preferred_width(availHeight);
let offset_x = this._isHorizontal?showAppsNatWidth:0;
let offset_y = this._isHorizontal?0:showAppsNatHeight;
let childBox = new Clutter.ActorBox();
if ((this._dtdSettings.get_boolean('show-apps-at-top') && !this._isHorizontal)
|| (this._dtdSettings.get_boolean('show-apps-at-top') && !this._rtl)
|| (!this._dtdSettings.get_boolean('show-apps-at-top') && this._isHorizontal && this._rtl)) {
childBox.x1 = contentBox.x1 + offset_x;
childBox.y1 = contentBox.y1 + offset_y;
childBox.x2 = contentBox.x2;
childBox.y2 = contentBox.y2;
appIcons.allocate(childBox, flags);
childBox.y1 = contentBox.y1;
childBox.x1 = contentBox.x1;
childBox.x2 = contentBox.x1 + showAppsNatWidth;
childBox.y2 = contentBox.y1 + showAppsNatHeight;
showAppsButton.allocate(childBox, flags);
}
else {
childBox.x1 = contentBox.x1;
childBox.y1 = contentBox.y1;
childBox.x2 = contentBox.x2 - offset_x;
childBox.y2 = contentBox.y2 - offset_y;
appIcons.allocate(childBox, flags);
childBox.x2 = contentBox.x2;
childBox.y2 = contentBox.y2;
childBox.x1 = contentBox.x2 - showAppsNatWidth;
childBox.y1 = contentBox.y2 - showAppsNatHeight;
showAppsButton.allocate(childBox, flags);
}
},
_getPreferredWidth: function(actor, forHeight, alloc) {
// We want to request the natural height of all our children
// as our natural height, so we chain up to StWidget (which
// then calls BoxLayout), but we only request the showApps
// button as the minimum size
let [, natWidth] = this.actor.layout_manager.get_preferred_width(this.actor, forHeight);
let themeNode = this.actor.get_theme_node();
let [, showAppsButton] = this.actor.get_children();
let [minWidth, ] = showAppsButton.get_preferred_height(forHeight);
alloc.min_size = minWidth;
alloc.natural_size = natWidth;
},
_getPreferredHeight: function(actor, forWidth, alloc) {
// We want to request the natural height of all our children
// as our natural height, so we chain up to StWidget (which
// then calls BoxLayout), but we only request the showApps
// button as the minimum size
let [, natHeight] = this.actor.layout_manager.get_preferred_height(this.actor, forWidth);
let themeNode = this.actor.get_theme_node();
let [, showAppsButton] = this.actor.get_children();
let [minHeight, ] = showAppsButton.get_preferred_height(forWidth);
alloc.min_size = minHeight;
alloc.natural_size = natHeight;
}
});
const baseIconSizes = [16, 22, 24, 32, 48, 64, 96, 128];
/**
* This class is a fork of the upstream dash class (ui.dash.js)
*
* Summary of changes:
* - disconnect global signals adding a destroy method;
* - play animations even when not in overview mode
* - set a maximum icon size
* - show running and/or favorite applications
* - emit a custom signal when an app icon is added
* - hide showApps label when the custom menu is shown.
* - add scrollview
* ensure actor is visible on keyfocus inseid the scrollview
* - add 128px icon size, might be usefull for hidpi display
* - sync minimization application target position.
* - keep running apps ordered.
*/
const MyDash = new Lang.Class({
Name: 'DashToDock.MyDash',
_init: function(settings) {
this._maxHeight = -1;
this.iconSize = 64;
this._availableIconSizes = baseIconSizes;
this._shownInitially = false;
this._dtdSettings = settings;
this._position = Convenience.getPosition(settings);
this._isHorizontal = ((this._position == St.Side.TOP) ||
(this._position == St.Side.BOTTOM));
this._signalsHandler = new Convenience.GlobalSignalsHandler();
this._dragPlaceholder = null;
this._dragPlaceholderPos = -1;
this._animatingPlaceholdersCount = 0;
this._showLabelTimeoutId = 0;
this._resetHoverTimeoutId = 0;
this._ensureAppIconVisibilityTimeoutId = 0;
this._labelShowing = false;
this._containerObject = new MyDashActor(settings);
this._container = this._containerObject.actor;
this._scrollView = new St.ScrollView({
name: 'dashtodockDashScrollview',
hscrollbar_policy: Gtk.PolicyType.NEVER,
vscrollbar_policy: Gtk.PolicyType.NEVER,
enable_mouse_scrolling: false
});
this._scrollView.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
this._box = new St.BoxLayout({
vertical: !this._isHorizontal,
clip_to_allocation: false,
x_align: Clutter.ActorAlign.START,
y_align: Clutter.ActorAlign.START
});
this._box._delegate = this;
this._container.add_actor(this._scrollView);
this._scrollView.add_actor(this._box);
this._showAppsIcon = new Dash.ShowAppsIcon();
AppIcons.extendShowAppsIcon(this._showAppsIcon, this._dtdSettings);
this._showAppsIcon.childScale = 1;
this._showAppsIcon.childOpacity = 255;
this._showAppsIcon.icon.setIconSize(this.iconSize);
this._hookUpLabel(this._showAppsIcon);
let appsIcon = this._showAppsIcon;
appsIcon.connect('menu-state-changed', Lang.bind(this, function(appsIcon, opened) {
this._itemMenuStateChanged(appsIcon, opened);
}));
this.showAppsButton = this._showAppsIcon.toggleButton;
this._container.add_actor(this._showAppsIcon);
let rtl = Clutter.get_default_text_direction() == Clutter.TextDirection.RTL;
this.actor = new St.Bin({
child: this._container,
y_align: St.Align.START,
x_align: rtl ? St.Align.END : St.Align.START
});
if (this._isHorizontal) {
this.actor.connect('notify::width', Lang.bind(this, function() {
if (this._maxHeight != this.actor.width)
this._queueRedisplay();
this._maxHeight = this.actor.width;
}));
}
else {
this.actor.connect('notify::height', Lang.bind(this, function() {
if (this._maxHeight != this.actor.height)
this._queueRedisplay();
this._maxHeight = this.actor.height;
}));
}
// Update minimization animation target position on allocation of the
// container and on scrollview change.
this._box.connect('notify::allocation', Lang.bind(this, this._updateAppsIconGeometry));
let scrollViewAdjustment = this._isHorizontal ? this._scrollView.hscroll.adjustment : this._scrollView.vscroll.adjustment;
scrollViewAdjustment.connect('notify::value', Lang.bind(this, this._updateAppsIconGeometry));
this._workId = Main.initializeDeferredWork(this._box, Lang.bind(this, this._redisplay));
this._settings = new Gio.Settings({
schema_id: 'org.gnome.shell'
});
this._appSystem = Shell.AppSystem.get_default();
this._signalsHandler.add([
this._appSystem,
'installed-changed',
Lang.bind(this, function() {
AppFavorites.getAppFavorites().reload();
this._queueRedisplay();
})
], [
AppFavorites.getAppFavorites(),
'changed',
Lang.bind(this, this._queueRedisplay)
], [
this._appSystem,
'app-state-changed',
Lang.bind(this, this._queueRedisplay)
], [
Main.overview,
'item-drag-begin',
Lang.bind(this, this._onDragBegin)
], [
Main.overview,
'item-drag-end',
Lang.bind(this, this._onDragEnd)
], [
Main.overview,
'item-drag-cancelled',
Lang.bind(this, this._onDragCancelled)
]);
},
destroy: function() {
this._signalsHandler.destroy();
},
_onScrollEvent: function(actor, event) {
// If scroll is not used because the icon is resized, let the scroll event propagate.
if (!this._dtdSettings.get_boolean('icon-size-fixed'))
return Clutter.EVENT_PROPAGATE;
// Event coordinates are relative to the stage but can be transformed
// as the actor will only receive events within his bounds.
let stage_x, stage_y, ok, event_x, event_y, actor_w, actor_h;
[stage_x, stage_y] = event.get_coords();
[ok, event_x, event_y] = actor.transform_stage_point(stage_x, stage_y);
[actor_w, actor_h] = actor.get_size();
// If the scroll event is within a 1px margin from
// the relevant edge of the actor, let the event propagate.
if ((this._position == St.Side.LEFT && event_x <= 1)
|| (this._position == St.Side.RIGHT && event_x >= actor_w - 2)
|| (this._position == St.Side.TOP && event_y <= 1)
|| (this._position == St.Side.BOTTOM && event_y >= actor_h - 2))
return Clutter.EVENT_PROPAGATE;
// reset timeout to avid conflicts with the mousehover event
if (this._ensureAppIconVisibilityTimeoutId > 0) {
Mainloop.source_remove(this._ensureAppIconVisibilityTimeoutId);
this._ensureAppIconVisibilityTimeoutId = 0;
}
// Skip to avoid double events mouse
if (event.is_pointer_emulated())
return Clutter.EVENT_STOP;
let adjustment, delta;
if (this._isHorizontal)
adjustment = this._scrollView.get_hscroll_bar().get_adjustment();
else
adjustment = this._scrollView.get_vscroll_bar().get_adjustment();
let increment = adjustment.step_increment;
switch (event.get_scroll_direction()) {
case Clutter.ScrollDirection.UP:
delta = -increment;
break;
case Clutter.ScrollDirection.DOWN:
delta = +increment;
break;
case Clutter.ScrollDirection.SMOOTH:
let [dx, dy] = event.get_scroll_delta();
delta = dy * increment;
// Also consider horizontal component, for instance touchpad
if (this._isHorizontal)
delta += dx * increment;
break;
}
adjustment.set_value(adjustment.get_value() + delta);
return Clutter.EVENT_STOP;
},
_onDragBegin: function() {
this._dragCancelled = false;
this._dragMonitor = {
dragMotion: Lang.bind(this, this._onDragMotion)
};
DND.addDragMonitor(this._dragMonitor);
if (this._box.get_n_children() == 0) {
this._emptyDropTarget = new Dash.EmptyDropTargetItem();
this._box.insert_child_at_index(this._emptyDropTarget, 0);
this._emptyDropTarget.show(true);
}
},
_onDragCancelled: function() {
this._dragCancelled = true;
this._endDrag();
},
_onDragEnd: function() {
if (this._dragCancelled)
return;
this._endDrag();
},
_endDrag: function() {
this._clearDragPlaceholder();
this._clearEmptyDropTarget();
this._showAppsIcon.setDragApp(null);
DND.removeDragMonitor(this._dragMonitor);
},
_onDragMotion: function(dragEvent) {
let app = Dash.getAppFromSource(dragEvent.source);
if (app == null)
return DND.DragMotionResult.CONTINUE;
let showAppsHovered = this._showAppsIcon.contains(dragEvent.targetActor);
if (!this._box.contains(dragEvent.targetActor) || showAppsHovered)
this._clearDragPlaceholder();
if (showAppsHovered)
this._showAppsIcon.setDragApp(app);
else
this._showAppsIcon.setDragApp(null);
return DND.DragMotionResult.CONTINUE;
},
_appIdListToHash: function(apps) {
let ids = {};
for (let i = 0; i < apps.length; i++)
ids[apps[i].get_id()] = apps[i];
return ids;
},
_queueRedisplay: function() {
Main.queueDeferredWork(this._workId);
},
_hookUpLabel: function(item, appIcon) {
item.child.connect('notify::hover', Lang.bind(this, function() {
this._syncLabel(item, appIcon);
}));
let id = Main.overview.connect('hiding', Lang.bind(this, function() {
this._labelShowing = false;
item.hideLabel();
}));
item.child.connect('destroy', function() {
Main.overview.disconnect(id);
});
if (appIcon) {
appIcon.connect('sync-tooltip', Lang.bind(this, function() {
this._syncLabel(item, appIcon);
}));
}
},
_createAppItem: function(app) {
let appIcon = new AppIcons.MyAppIcon(this._dtdSettings, app,
{ setSizeManually: true,
showLabel: false });
if (appIcon._draggable) {
appIcon._draggable.connect('drag-begin', Lang.bind(this, function() {
appIcon.actor.opacity = 50;
}));
appIcon._draggable.connect('drag-end', Lang.bind(this, function() {
appIcon.actor.opacity = 255;
}));
}
appIcon.connect('menu-state-changed', Lang.bind(this, function(appIcon, opened) {
this._itemMenuStateChanged(item, opened);
}));
let item = new Dash.DashItemContainer();
extendDashItemContainer(item, this._dtdSettings);
item.setChild(appIcon.actor);
appIcon.actor.connect('notify::hover', Lang.bind(this, function() {
if (appIcon.actor.hover) {
this._ensureAppIconVisibilityTimeoutId = Mainloop.timeout_add(100, Lang.bind(this, function() {
ensureActorVisibleInScrollView(this._scrollView, appIcon.actor);
this._ensureAppIconVisibilityTimeoutId = 0;
return GLib.SOURCE_REMOVE;
}));
}
else {
if (this._ensureAppIconVisibilityTimeoutId > 0) {
Mainloop.source_remove(this._ensureAppIconVisibilityTimeoutId);
this._ensureAppIconVisibilityTimeoutId = 0;
}
}
}));
appIcon.actor.connect('clicked', Lang.bind(this, function(actor) {
ensureActorVisibleInScrollView(this._scrollView, actor);
}));
appIcon.actor.connect('key-focus-in', Lang.bind(this, function(actor) {
let [x_shift, y_shift] = ensureActorVisibleInScrollView(this._scrollView, actor);
// This signal is triggered also by mouse click. The popup menu is opened at the original
// coordinates. Thus correct for the shift which is going to be applied to the scrollview.
if (appIcon._menu) {
appIcon._menu._boxPointer.xOffset = -x_shift;
appIcon._menu._boxPointer.yOffset = -y_shift;
}
}));
// Override default AppIcon label_actor, now the
// accessible_name is set at DashItemContainer.setLabelText
appIcon.actor.label_actor = null;
item.setLabelText(app.get_name());
appIcon.icon.setIconSize(this.iconSize);
this._hookUpLabel(item, appIcon);
return item;
},
/**
* Return an array with the "proper" appIcons currently in the dash
*/
_getAppIcons: function() {
// Only consider children which are "proper"
// icons (i.e. ignoring drag placeholders) and which are not
// animating out (which means they will be destroyed at the end of
// the animation)
let iconChildren = this._box.get_children().filter(function(actor) {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.icon &&
!actor.animatingOut;
});
let appIcons = iconChildren.map(function(actor) {
return actor.child._delegate;
});
return appIcons;
},
_updateAppsIconGeometry: function() {
let appIcons = this._getAppIcons();
appIcons.forEach(function(icon) {
icon.updateIconGeometry();
});
},
_itemMenuStateChanged: function(item, opened) {
// When the menu closes, it calls sync_hover, which means
// that the notify::hover handler does everything we need to.
if (opened) {
if (this._showLabelTimeoutId > 0) {
Mainloop.source_remove(this._showLabelTimeoutId);
this._showLabelTimeoutId = 0;
}
item.hideLabel();
}
else {
// I want to listen from outside when a menu is closed. I used to
// add a custom signal to the appIcon, since gnome 3.8 the signal
// calling this callback was added upstream.
this.emit('menu-closed');
}
},
_syncLabel: function(item, appIcon) {
let shouldShow = appIcon ? appIcon.shouldShowTooltip() : item.child.get_hover();
if (shouldShow) {
if (this._showLabelTimeoutId == 0) {
let timeout = this._labelShowing ? 0 : DASH_ITEM_HOVER_TIMEOUT;
this._showLabelTimeoutId = Mainloop.timeout_add(timeout, Lang.bind(this, function() {
this._labelShowing = true;
item.showLabel();
this._showLabelTimeoutId = 0;
return GLib.SOURCE_REMOVE;
}));
GLib.Source.set_name_by_id(this._showLabelTimeoutId, '[gnome-shell] item.showLabel');
if (this._resetHoverTimeoutId > 0) {
Mainloop.source_remove(this._resetHoverTimeoutId);
this._resetHoverTimeoutId = 0;
}
}
}
else {
if (this._showLabelTimeoutId > 0)
Mainloop.source_remove(this._showLabelTimeoutId);
this._showLabelTimeoutId = 0;
item.hideLabel();
if (this._labelShowing) {
this._resetHoverTimeoutId = Mainloop.timeout_add(DASH_ITEM_HOVER_TIMEOUT, Lang.bind(this, function() {
this._labelShowing = false;
this._resetHoverTimeoutId = 0;
return GLib.SOURCE_REMOVE;
}));
GLib.Source.set_name_by_id(this._resetHoverTimeoutId, '[gnome-shell] this._labelShowing');
}
}
},
_adjustIconSize: function() {
// For the icon size, we only consider children which are "proper"
// icons (i.e. ignoring drag placeholders) and which are not
// animating out (which means they will be destroyed at the end of
// the animation)
let iconChildren = this._box.get_children().filter(function(actor) {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.icon &&
!actor.animatingOut;
});
iconChildren.push(this._showAppsIcon);
if (this._maxHeight == -1)
return;
// Check if the container is present in the stage. This avoids critical
// errors when unlocking the screen
if (!this._container.get_stage())
return;
let themeNode = this._container.get_theme_node();
let maxAllocation = new Clutter.ActorBox({
x1: 0,
y1: 0,
x2: this._isHorizontal ? this._maxHeight : 42 /* whatever */,
y2: this._isHorizontal ? 42 : this._maxHeight
});
let maxContent = themeNode.get_content_box(maxAllocation);
let availHeight;
if (this._isHorizontal)
availHeight = maxContent.x2 - maxContent.x1;
else
availHeight = maxContent.y2 - maxContent.y1;
let spacing = themeNode.get_length('spacing');
let firstButton = iconChildren[0].child;
let firstIcon = firstButton._delegate.icon;
let minHeight, natHeight, maxWidth, natWidth;
// Enforce the current icon size during the size request
firstIcon.setIconSize(this.iconSize);
[minHeight, natHeight] = firstButton.get_preferred_height(-1);
[minWidth, natWidth] = firstButton.get_preferred_width(-1);
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
let iconSizes = this._availableIconSizes.map(function(s) {
return s * scaleFactor;
});
// Subtract icon padding and box spacing from the available height
if (this._isHorizontal)
availHeight -= iconChildren.length * (natWidth - this.iconSize * scaleFactor) +
(iconChildren.length - 1) * spacing;
else
availHeight -= iconChildren.length * (natHeight - this.iconSize * scaleFactor) +
(iconChildren.length - 1) * spacing;
let availSize = availHeight / iconChildren.length;
let newIconSize = this._availableIconSizes[0];
for (let i = 0; i < iconSizes.length; i++) {
if (iconSizes[i] < availSize)
newIconSize = this._availableIconSizes[i];
}
if (newIconSize == this.iconSize)
return;
let oldIconSize = this.iconSize;
this.iconSize = newIconSize;
this.emit('icon-size-changed');
let scale = oldIconSize / newIconSize;
for (let i = 0; i < iconChildren.length; i++) {
let icon = iconChildren[i].child._delegate.icon;
// Set the new size immediately, to keep the icons' sizes
// in sync with this.iconSize
icon.setIconSize(this.iconSize);
// Don't animate the icon size change when the overview
// is transitioning, or when initially filling
// the dash
if (Main.overview.animationInProgress ||
!this._shownInitially)
continue;
let [targetWidth, targetHeight] = icon.icon.get_size();
// Scale the icon's texture to the previous size and
// tween to the new size
icon.icon.set_size(icon.icon.width * scale,
icon.icon.height * scale);
Tweener.addTween(icon.icon,
{ width: targetWidth,
height: targetHeight,
time: DASH_ANIMATION_TIME,
transition: 'easeOutQuad',
});
}
},
_redisplay: function() {
let favorites = AppFavorites.getAppFavorites().getFavoriteMap();
let running = this._appSystem.get_running();
if (this._dtdSettings.get_boolean('isolate-workspaces')) {
// When using isolation, we filter out apps that have no windows in
// the current workspace
let settings = this._dtdSettings;
running = running.filter(function(_app) {
return AppIcons.getInterestingWindows(_app, settings).length != 0;
});
}
let children = this._box.get_children().filter(function(actor) {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.app;
});
// Apps currently in the dash
let oldApps = children.map(function(actor) {
return actor.child._delegate.app;
});
// Apps supposed to be in the dash
let newApps = [];
if (this._dtdSettings.get_boolean('show-favorites')) {
for (let id in favorites)
newApps.push(favorites[id]);
}
// We reorder the running apps so that they don't change position on the
// dash with every redisplay() call
if (this._dtdSettings.get_boolean('show-running')) {
// First: add the apps from the oldApps list that are still running
for (let i = 0; i < oldApps.length; i++) {
let index = running.indexOf(oldApps[i]);
if (index > -1) {
let app = running.splice(index, 1)[0];
if (this._dtdSettings.get_boolean('show-favorites') && (app.get_id() in favorites))
continue;
newApps.push(app);
}
}
// Second: add the new apps
for (let i = 0; i < running.length; i++) {
let app = running[i];
if (this._dtdSettings.get_boolean('show-favorites') && (app.get_id() in favorites))
continue;
newApps.push(app);
}
}
// Figure out the actual changes to the list of items; we iterate
// over both the list of items currently in the dash and the list
// of items expected there, and collect additions and removals.
// Moves are both an addition and a removal, where the order of
// the operations depends on whether we encounter the position
// where the item has been added first or the one from where it
// was removed.
// There is an assumption that only one item is moved at a given
// time; when moving several items at once, everything will still
// end up at the right position, but there might be additional
// additions/removals (e.g. it might remove all the launchers
// and add them back in the new order even if a smaller set of
// additions and removals is possible).
// If above assumptions turns out to be a problem, we might need
// to use a more sophisticated algorithm, e.g. Longest Common
// Subsequence as used by diff.
let addedItems = [];
let removedActors = [];
let newIndex = 0;
let oldIndex = 0;
while ((newIndex < newApps.length) || (oldIndex < oldApps.length)) {
// No change at oldIndex/newIndex
if (oldApps[oldIndex] == newApps[newIndex]) {
oldIndex++;
newIndex++;
continue;
}
// App removed at oldIndex
if (oldApps[oldIndex] && (newApps.indexOf(oldApps[oldIndex]) == -1)) {
removedActors.push(children[oldIndex]);
oldIndex++;
continue;
}
// App added at newIndex
if (newApps[newIndex] && (oldApps.indexOf(newApps[newIndex]) == -1)) {
let newItem = this._createAppItem(newApps[newIndex]);
addedItems.push({ app: newApps[newIndex],
item: newItem,
pos: newIndex });
newIndex++;
continue;
}
// App moved
let insertHere = newApps[newIndex + 1] && (newApps[newIndex + 1] == oldApps[oldIndex]);
let alreadyRemoved = removedActors.reduce(function(result, actor) {
let removedApp = actor.child._delegate.app;
return result || removedApp == newApps[newIndex];
}, false);
if (insertHere || alreadyRemoved) {
let newItem = this._createAppItem(newApps[newIndex]);
addedItems.push({
app: newApps[newIndex],
item: newItem,
pos: newIndex + removedActors.length
});
newIndex++;
}
else {
removedActors.push(children[oldIndex]);
oldIndex++;
}
}
for (let i = 0; i < addedItems.length; i++)
this._box.insert_child_at_index(addedItems[i].item,
addedItems[i].pos);
for (let i = 0; i < removedActors.length; i++) {
let item = removedActors[i];
// Don't animate item removal when the overview is transitioning
if (!Main.overview.animationInProgress)
item.animateOutAndDestroy();
else
item.destroy();
}
this._adjustIconSize();
for (let i = 0; i < addedItems.length; i++)
// Emit a custom signal notifying that a new item has been added
this.emit('item-added', addedItems[i]);
// Skip animations on first run when adding the initial set
// of items, to avoid all items zooming in at once
let animate = this._shownInitially &&
!Main.overview.animationInProgress;
if (!this._shownInitially)
this._shownInitially = true;
for (let i = 0; i < addedItems.length; i++)
addedItems[i].item.show(animate);
// Workaround for https://bugzilla.gnome.org/show_bug.cgi?id=692744
// Without it, StBoxLayout may use a stale size cache
this._box.queue_relayout();
// This is required for icon reordering when the scrollview is used.
this._updateAppsIconGeometry();
// This will update the size, and the corresponding number for each icon
this._updateNumberOverlay();
},
_updateNumberOverlay: function() {
let appIcons = this._getAppIcons();
let counter = 1;
appIcons.forEach(function(icon) {
if (counter < 10){
icon.setNumberOverlay(counter);
counter++;
}
else if (counter == 10) {
icon.setNumberOverlay(0);
counter++;
}
else {
// No overlay after 10
icon.setNumberOverlay(-1);
}
icon.updateNumberOverlay();
});
},
toggleNumberOverlay: function(activate) {
let appIcons = this._getAppIcons();
appIcons.forEach(function(icon) {
icon.toggleNumberOverlay(activate);
});
},
setIconSize: function(max_size, doNotAnimate) {
let max_allowed = baseIconSizes[baseIconSizes.length-1];
max_size = Math.min(max_size, max_allowed);
if (this._dtdSettings.get_boolean('icon-size-fixed'))
this._availableIconSizes = [max_size];
else {
this._availableIconSizes = baseIconSizes.filter(function(val) {
return (val<max_size);
});
this._availableIconSizes.push(max_size);
}
if (doNotAnimate)
this._shownInitially = false;
this._queueRedisplay();
},
/**
* Reset the displayed apps icon to mantain the correct order when changing
* show favorites/show running settings
*/
resetAppIcons: function() {
let children = this._box.get_children().filter(function(actor) {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.icon;
});
for (let i = 0; i < children.length; i++) {
let item = children[i];
item.destroy();
}
// to avoid ugly animations, just suppress them like when dash is first loaded.
this._shownInitially = false;
this._redisplay();
},
_clearDragPlaceholder: function() {
if (this._dragPlaceholder) {
this._animatingPlaceholdersCount++;
this._dragPlaceholder.animateOutAndDestroy();
this._dragPlaceholder.connect('destroy', Lang.bind(this, function() {
this._animatingPlaceholdersCount--;
}));
this._dragPlaceholder = null;
}
this._dragPlaceholderPos = -1;
},
_clearEmptyDropTarget: function() {
if (this._emptyDropTarget) {
this._emptyDropTarget.animateOutAndDestroy();
this._emptyDropTarget = null;
}
},
handleDragOver: function(source, actor, x, y, time) {
let app = Dash.getAppFromSource(source);
// Don't allow favoriting of transient apps
if (app == null || app.is_window_backed())
return DND.DragMotionResult.NO_DROP;
if (!this._settings.is_writable('favorite-apps') || !this._dtdSettings.get_boolean('show-favorites'))
return DND.DragMotionResult.NO_DROP;
let favorites = AppFavorites.getAppFavorites().getFavorites();
let numFavorites = favorites.length;
let favPos = favorites.indexOf(app);
let children = this._box.get_children();
let numChildren = children.length;
let boxHeight = 0;
for (let i = 0; i < numChildren; i++)
boxHeight += this._isHorizontal?children[i].width:children[i].height;
// Keep the placeholder out of the index calculation; assuming that
// the remove target has the same size as "normal" items, we don't
// need to do the same adjustment there.
if (this._dragPlaceholder) {
boxHeight -= this._isHorizontal?this._dragPlaceholder.width:this._dragPlaceholder.height;
numChildren--;
}
let pos;
if (!this._emptyDropTarget) {
pos = Math.floor((this._isHorizontal?x:y) * numChildren / boxHeight);
if (pos > numChildren)
pos = numChildren;
}
else
pos = 0; // always insert at the top when dash is empty
// Take into account childredn position in rtl
if (this._isHorizontal && (Clutter.get_default_text_direction() == Clutter.TextDirection.RTL))
pos = numChildren - pos;
if ((pos != this._dragPlaceholderPos) && (pos <= numFavorites) && (this._animatingPlaceholdersCount == 0)) {
this._dragPlaceholderPos = pos;
// Don't allow positioning before or after self