gnome-shell/js/ui/dash.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported Dash */
const { Clutter, GLib, GObject,
Graphene, Meta, Shell, St } = imports.gi;
const AppDisplay = imports.ui.appDisplay;
const AppFavorites = imports.ui.appFavorites;
const DND = imports.ui.dnd;
const IconGrid = imports.ui.iconGrid;
const Main = imports.ui.main;
var DASH_ANIMATION_TIME = 200;
var DASH_ITEM_LABEL_SHOW_TIME = 150;
var DASH_ITEM_LABEL_HIDE_TIME = 100;
var DASH_ITEM_HOVER_TIMEOUT = 300;
function getAppFromSource(source) {
if (source instanceof AppDisplay.AppIcon)
return source.app;
else
return null;
}
var DashIcon = GObject.registerClass(
class DashIcon extends AppDisplay.AppIcon {
_init(app) {
super._init(app, {
setSizeManually: true,
showLabel: false,
});
}
// Disable all DnD methods
_onDragBegin() {
}
_onDragEnd() {
}
handleDragOver() {
return DND.DragMotionResult.CONTINUE;
}
acceptDrop() {
return false;
}
});
// A container like StBin, but taking the child's scale into account
// when requesting a size
var DashItemContainer = GObject.registerClass(
class DashItemContainer extends St.Widget {
_init() {
super._init({ style_class: 'dash-item-container',
pivot_point: new Graphene.Point({ x: .5, y: .5 }),
scale_x: 0,
scale_y: 0,
opacity: 0,
x_expand: true,
x_align: Clutter.ActorAlign.CENTER });
this._labelText = "";
this.label = new St.Label({ style_class: 'dash-label' });
this.label.hide();
Main.layoutManager.addChrome(this.label);
this.label_actor = this.label;
this.child = null;
this.animatingOut = false;
this.connect('notify::scale-x', () => this.queue_relayout());
this.connect('notify::scale-y', () => this.queue_relayout());
this.connect('destroy', () => {
if (this.child != null)
this.child.destroy();
this.label.destroy();
});
}
vfunc_get_preferred_height(forWidth) {
let themeNode = this.get_theme_node();
forWidth = themeNode.adjust_for_width(forWidth);
let [minHeight, natHeight] = super.vfunc_get_preferred_height(forWidth);
return themeNode.adjust_preferred_height(minHeight * this.scale_y,
natHeight * this.scale_y);
}
vfunc_get_preferred_width(forHeight) {
let themeNode = this.get_theme_node();
forHeight = themeNode.adjust_for_height(forHeight);
let [minWidth, natWidth] = super.vfunc_get_preferred_width(forHeight);
return themeNode.adjust_preferred_width(minWidth * this.scale_x,
natWidth * this.scale_x);
}
showLabel() {
if (!this._labelText)
return;
this.label.set_text(this._labelText);
this.label.opacity = 0;
this.label.show();
let [stageX, stageY] = this.get_transformed_position();
let itemHeight = this.allocation.y2 - this.allocation.y1;
let labelHeight = this.label.get_height();
let yOffset = Math.floor((itemHeight - labelHeight) / 2);
let y = stageY + yOffset;
let node = this.label.get_theme_node();
let xOffset = node.get_length('-x-offset');
let x;
if (Clutter.get_default_text_direction() == Clutter.TextDirection.RTL)
x = stageX - this.label.get_width() - xOffset;
else
x = stageX + this.get_width() + xOffset;
this.label.set_position(x, y);
this.label.ease({
opacity: 255,
duration: DASH_ITEM_LABEL_SHOW_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
});
}
setLabelText(text) {
this._labelText = text;
this.child.accessible_name = text;
}
hideLabel() {
this.label.ease({
opacity: 0,
duration: DASH_ITEM_LABEL_HIDE_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
onComplete: () => this.label.hide(),
});
}
setChild(actor) {
if (this.child == actor)
return;
this.destroy_all_children();
this.child = actor;
this.add_actor(this.child);
}
show(animate) {
if (this.child == null)
return;
let time = animate ? DASH_ANIMATION_TIME : 0;
this.ease({
scale_x: 1,
scale_y: 1,
opacity: 255,
duration: time,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
});
}
animateOutAndDestroy() {
this.label.hide();
if (this.child == null) {
this.destroy();
return;
}
this.animatingOut = true;
this.ease({
scale_x: 0,
scale_y: 0,
opacity: 0,
duration: DASH_ANIMATION_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
onComplete: () => this.destroy(),
});
}
});
var ShowAppsIcon = GObject.registerClass(
class ShowAppsIcon extends DashItemContainer {
_init() {
super._init();
this.toggleButton = new St.Button({ style_class: 'show-apps',
track_hover: true,
can_focus: true,
toggle_mode: true });
this._iconActor = null;
this.icon = new IconGrid.BaseIcon(_("Show Applications"),
{ setSizeManually: true,
showLabel: false,
createIcon: this._createIcon.bind(this) });
this.toggleButton.add_actor(this.icon);
this.toggleButton._delegate = this;
this.setChild(this.toggleButton);
this.setDragApp(null);
}
_createIcon(size) {
this._iconActor = new St.Icon({ icon_name: 'view-app-grid-symbolic',
icon_size: size,
style_class: 'show-apps-icon',
track_hover: true });
return this._iconActor;
}
_canRemoveApp(app) {
if (app == null)
return false;
if (!global.settings.is_writable('favorite-apps'))
return false;
let id = app.get_id();
let isFavorite = AppFavorites.getAppFavorites().isFavorite(id);
return isFavorite;
}
setDragApp(app) {
let canRemove = this._canRemoveApp(app);
this.toggleButton.set_hover(canRemove);
if (this._iconActor)
this._iconActor.set_hover(canRemove);
if (canRemove)
this.setLabelText(_("Remove from Favorites"));
else
this.setLabelText(_("Show Applications"));
}
handleDragOver(source, _actor, _x, _y, _time) {
if (!this._canRemoveApp(getAppFromSource(source)))
return DND.DragMotionResult.NO_DROP;
return DND.DragMotionResult.MOVE_DROP;
}
acceptDrop(source, _actor, _x, _y, _time) {
let app = getAppFromSource(source);
if (!this._canRemoveApp(app))
return false;
let id = app.get_id();
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
AppFavorites.getAppFavorites().removeFavorite(id);
return false;
});
return true;
}
});
var DragPlaceholderItem = GObject.registerClass(
class DragPlaceholderItem extends DashItemContainer {
_init() {
super._init();
this.setChild(new St.Bin({ style_class: 'placeholder' }));
}
});
var EmptyDropTargetItem = GObject.registerClass(
class EmptyDropTargetItem extends DashItemContainer {
_init() {
super._init();
this.setChild(new St.Bin({ style_class: 'empty-dash-drop-target' }));
}
});
var DashActor = GObject.registerClass(
class DashActor extends St.Widget {
_init() {
let layout = new Clutter.BoxLayout({ orientation: Clutter.Orientation.VERTICAL });
super._init({
name: 'dash',
layout_manager: layout,
clip_to_allocation: true,
y_align: Clutter.ActorAlign.CENTER,
});
}
vfunc_allocate(box, flags) {
let contentBox = this.get_theme_node().get_content_box(box);
let availWidth = contentBox.x2 - contentBox.x1;
this.set_allocation(box, flags);
let [appIcons, showAppsButton] = this.get_children();
let [, showAppsNatHeight] = showAppsButton.get_preferred_height(availWidth);
let childBox = new Clutter.ActorBox();
childBox.x1 = contentBox.x1;
childBox.y1 = contentBox.y1;
childBox.x2 = contentBox.x2;
childBox.y2 = contentBox.y2 - showAppsNatHeight;
appIcons.allocate(childBox, flags);
childBox.y1 = contentBox.y2 - showAppsNatHeight;
childBox.y2 = contentBox.y2;
showAppsButton.allocate(childBox, flags);
}
vfunc_get_preferred_height(forWidth) {
// 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] = super.vfunc_get_preferred_height(forWidth);
let themeNode = this.get_theme_node();
let adjustedForWidth = themeNode.adjust_for_width(forWidth);
let [, showAppsButton] = this.get_children();
let [minHeight] = showAppsButton.get_preferred_height(adjustedForWidth);
[minHeight] = themeNode.adjust_preferred_height(minHeight, natHeight);
return [minHeight, natHeight];
}
});
const baseIconSizes = [16, 22, 24, 32, 48, 64];
var Dash = GObject.registerClass({
Signals: { 'icon-size-changed': {} },
}, class Dash extends St.Bin {
_init() {
this._maxHeight = -1;
this.iconSize = 64;
this._shownInitially = false;
this._dragPlaceholder = null;
this._dragPlaceholderPos = -1;
this._animatingPlaceholdersCount = 0;
this._showLabelTimeoutId = 0;
this._resetHoverTimeoutId = 0;
this._labelShowing = false;
this._container = new DashActor();
this._box = new St.BoxLayout({ vertical: true,
clip_to_allocation: true });
this._box._delegate = this;
this._container.add_actor(this._box);
this._container.set_offscreen_redirect(Clutter.OffscreenRedirect.ALWAYS);
this._showAppsIcon = new ShowAppsIcon();
this._showAppsIcon.show(false);
this._showAppsIcon.icon.setIconSize(this.iconSize);
this._hookUpLabel(this._showAppsIcon);
this.showAppsButton = this._showAppsIcon.toggleButton;
this._container.add_actor(this._showAppsIcon);
super._init({ child: this._container });
this.connect('notify::height', () => {
if (this._maxHeight != this.height)
this._queueRedisplay();
this._maxHeight = this.height;
});
this._workId = Main.initializeDeferredWork(this._box, this._redisplay.bind(this));
this._appSystem = Shell.AppSystem.get_default();
this._appSystem.connect('installed-changed', () => {
AppFavorites.getAppFavorites().reload();
this._queueRedisplay();
});
AppFavorites.getAppFavorites().connect('changed', this._queueRedisplay.bind(this));
this._appSystem.connect('app-state-changed', this._queueRedisplay.bind(this));
Main.overview.connect('item-drag-begin',
this._onDragBegin.bind(this));
Main.overview.connect('item-drag-end',
this._onDragEnd.bind(this));
Main.overview.connect('item-drag-cancelled',
this._onDragCancelled.bind(this));
// Translators: this is the name of the dock/favorites area on
// the left of the overview
Main.ctrlAltTabManager.addGroup(this, _("Dash"), 'user-bookmarks-symbolic');
}
_onDragBegin() {
this._dragCancelled = false;
this._dragMonitor = {
dragMotion: this._onDragMotion.bind(this),
};
DND.addDragMonitor(this._dragMonitor);
if (this._box.get_n_children() == 0) {
this._emptyDropTarget = new EmptyDropTargetItem();
this._box.insert_child_at_index(this._emptyDropTarget, 0);
this._emptyDropTarget.show(true);
}
}
_onDragCancelled() {
this._dragCancelled = true;
this._endDrag();
}
_onDragEnd() {
if (this._dragCancelled)
return;
this._endDrag();
}
_endDrag() {
this._clearDragPlaceholder();
this._clearEmptyDropTarget();
this._showAppsIcon.setDragApp(null);
DND.removeDragMonitor(this._dragMonitor);
}
_onDragMotion(dragEvent) {
let app = 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(apps) {
let ids = {};
for (let i = 0; i < apps.length; i++)
ids[apps[i].get_id()] = apps[i];
return ids;
}
_queueRedisplay() {
Main.queueDeferredWork(this._workId);
}
_hookUpLabel(item, appIcon) {
item.child.connect('notify::hover', () => {
this._syncLabel(item, appIcon);
});
let id = Main.overview.connect('hiding', () => {
this._labelShowing = false;
item.hideLabel();
});
item.child.connect('destroy', () => {
Main.overview.disconnect(id);
});
if (appIcon) {
appIcon.connect('sync-tooltip', () => {
this._syncLabel(item, appIcon);
});
}
}
_createAppItem(app) {
let appIcon = new DashIcon(app);
appIcon.connect('menu-state-changed',
(o, opened) => {
this._itemMenuStateChanged(item, opened);
});
let item = new DashItemContainer();
item.setChild(appIcon);
// Override default AppIcon label_actor, now the
// accessible_name is set at DashItemContainer.setLabelText
appIcon.label_actor = null;
item.setLabelText(app.get_name());
appIcon.icon.setIconSize(this.iconSize);
this._hookUpLabel(item, appIcon);
return item;
}
_itemMenuStateChanged(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) {
GLib.source_remove(this._showLabelTimeoutId);
this._showLabelTimeoutId = 0;
}
item.hideLabel();
}
}
_syncLabel(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 = GLib.timeout_add(GLib.PRIORITY_DEFAULT, timeout,
() => {
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) {
GLib.source_remove(this._resetHoverTimeoutId);
this._resetHoverTimeoutId = 0;
}
}
} else {
if (this._showLabelTimeoutId > 0)
GLib.source_remove(this._showLabelTimeoutId);
this._showLabelTimeoutId = 0;
item.hideLabel();
if (this._labelShowing) {
this._resetHoverTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, DASH_ITEM_HOVER_TIMEOUT,
() => {
this._labelShowing = false;
this._resetHoverTimeoutId = 0;
return GLib.SOURCE_REMOVE;
});
GLib.Source.set_name_by_id(this._resetHoverTimeoutId, '[gnome-shell] this._labelShowing');
}
}
}
_adjustIconSize() {
// 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(actor => {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.icon &&
!actor.animatingOut;
});
iconChildren.push(this._showAppsIcon);
if (this._maxHeight == -1)
return;
let themeNode = this._container.get_theme_node();
let maxAllocation = new Clutter.ActorBox({ x1: 0, y1: 0,
x2: 42 /* whatever */,
y2: this._maxHeight });
let maxContent = themeNode.get_content_box(maxAllocation);
let availHeight = maxContent.y2 - maxContent.y1;
let spacing = themeNode.get_length('spacing');
let firstButton = iconChildren[0].child;
let firstIcon = firstButton._delegate.icon;
// Enforce valid spacings during the size request
firstIcon.icon.ensure_style();
let [, iconHeight] = firstIcon.icon.get_preferred_height(-1);
let [, buttonHeight] = firstButton.get_preferred_height(-1);
// Subtract icon padding and box spacing from the available height
availHeight -= iconChildren.length * (buttonHeight - iconHeight) +
(iconChildren.length - 1) * spacing;
let availSize = availHeight / iconChildren.length;
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
let iconSizes = baseIconSizes.map(s => s * scaleFactor);
let newIconSize = baseIconSizes[0];
for (let i = 0; i < iconSizes.length; i++) {
if (iconSizes[i] < availSize)
newIconSize = baseIconSizes[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, not visible or when initially filling
// the dash
if (!Main.overview.visible || 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);
icon.icon.ease({
width: targetWidth,
height: targetHeight,
duration: DASH_ANIMATION_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
});
}
}
_redisplay() {
let favorites = AppFavorites.getAppFavorites().getFavoriteMap();
let running = this._appSystem.get_running();
let children = this._box.get_children().filter(actor => {
return actor.child &&
actor.child._delegate &&
actor.child._delegate.app;
});
// Apps currently in the dash
let oldApps = children.map(actor => actor.child._delegate.app);
// Apps supposed to be in the dash
let newApps = [];
for (let id in favorites)
newApps.push(favorites[id]);
for (let i = 0; i < running.length; i++) {
let app = running[i];
if (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) {
let oldApp = oldApps.length > oldIndex ? oldApps[oldIndex] : null;
let newApp = newApps.length > newIndex ? newApps[newIndex] : null;
// No change at oldIndex/newIndex
if (oldApp == newApp) {
oldIndex++;
newIndex++;
continue;
}
// App removed at oldIndex
if (oldApp && !newApps.includes(oldApp)) {
removedActors.push(children[oldIndex]);
oldIndex++;
continue;
}
// App added at newIndex
if (newApp && !oldApps.includes(newApp)) {
addedItems.push({ app: newApp,
item: this._createAppItem(newApp),
pos: newIndex });
newIndex++;
continue;
}
// App moved
let nextApp = newApps.length > newIndex + 1
? newApps[newIndex + 1] : null;
let insertHere = nextApp && nextApp == oldApp;
let alreadyRemoved = removedActors.reduce((result, actor) => {
let removedApp = actor.child._delegate.app;
return result || removedApp == newApp;
}, false);
if (insertHere || alreadyRemoved) {
let newItem = this._createAppItem(newApp);
addedItems.push({ app: newApp,
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
// or hidden
if (Main.overview.visible && !Main.overview.animationInProgress)
item.animateOutAndDestroy();
else
item.destroy();
}
this._adjustIconSize();
// 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.visible &&
!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();
}
_clearDragPlaceholder() {
if (this._dragPlaceholder) {
this._animatingPlaceholdersCount++;
this._dragPlaceholder.animateOutAndDestroy();
this._dragPlaceholder.connect('destroy', () => {
this._animatingPlaceholdersCount--;
});
this._dragPlaceholder = null;
}
this._dragPlaceholderPos = -1;
}
_clearEmptyDropTarget() {
if (this._emptyDropTarget) {
this._emptyDropTarget.animateOutAndDestroy();
this._emptyDropTarget = null;
}
}
handleDragOver(source, actor, x, y, _time) {
let app = getAppFromSource(source);
// Don't allow favoriting of transient apps
Kill off ShellAppInfo, move into ShellApp This dramatically thins down and sanitizes the application code. The ShellAppSystem changes in a number of ways: * Preferences are special cased more explicitly; they aren't apps, they're shortcuts for an app), and we don't have many of them, so don't need e.g. the optimizations in ShellAppSystem for searching. * get_app() changes to lookup_app() and returns null if an app isn't found. The semantics where it tried to find the .desktop file if we didn't know about it were just broken; I am pretty sure no caller needs this, and if they do we'll fix them. * ShellAppSystem maintains two indexes on apps (by desktop file id and by GMenuTreeEntry), but is no longer in the business of dealing with GMenuTree as far as hierarchy and categories go. That is moved up into js/ui/appDisplay.js. Actually, it flattens both apps and settings. Also, ShellWindowTracker is now the sole reference-owner for window-backed apps. We still do the weird "window:0x1234beef" id for these apps, but a reference is not stored in ShellAppSystem. The js/ui/appDisplay.js code is rewritten, and sucks a lot less. Variable names are clearer: _apps -> _appIcons _filterApp -> _visibleApps _filters -> _categoryBox Similarly for function names. We no longer call (for every app) a recursive lookup in GMenuTree to see if it's in a particular section on every category switch; it's all cached. NOTE - this intentionally reverts the incremental loading code from commit 7813c5b93f6bcde8c4beae286e82bfc472b2b656. It's fast enough here without that. https://bugzilla.gnome.org/show_bug.cgi?id=648149
2011-04-21 13:35:01 -04:00
if (app == null || app.is_window_backed())
return DND.DragMotionResult.NO_DROP;
if (!global.settings.is_writable('favorite-apps'))
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 = this._box.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._dragPlaceholder.height;
numChildren--;
}
let pos;
if (!this._emptyDropTarget)
pos = Math.floor(y * numChildren / boxHeight);
else
pos = 0; // always insert at the top when dash is empty
// Put the placeholder after the last favorite if we are not
// in the favorites zone
if (pos > numFavorites)
pos = numFavorites;
if (pos !== this._dragPlaceholderPos && this._animatingPlaceholdersCount === 0) {
this._dragPlaceholderPos = pos;
// Don't allow positioning before or after self
if (favPos != -1 && (pos == favPos || pos == favPos + 1)) {
this._clearDragPlaceholder();
return DND.DragMotionResult.CONTINUE;
}
// If the placeholder already exists, we just move
// it, but if we are adding it, expand its size in
// an animation
let fadeIn;
if (this._dragPlaceholder) {
this._dragPlaceholder.destroy();
fadeIn = false;
} else {
fadeIn = true;
}
this._dragPlaceholder = new DragPlaceholderItem();
this._dragPlaceholder.child.set_width(this.iconSize);
this._dragPlaceholder.child.set_height(this.iconSize / 2);
this._box.insert_child_at_index(this._dragPlaceholder,
this._dragPlaceholderPos);
this._dragPlaceholder.show(fadeIn);
}
if (!this._dragPlaceholder)
return DND.DragMotionResult.NO_DROP;
let srcIsFavorite = favPos != -1;
if (srcIsFavorite)
return DND.DragMotionResult.MOVE_DROP;
return DND.DragMotionResult.COPY_DROP;
}
// Draggable target interface
acceptDrop(source, _actor, _x, _y, _time) {
let app = getAppFromSource(source);
// Don't allow favoriting of transient apps
if (app == null || app.is_window_backed())
return false;
if (!global.settings.is_writable('favorite-apps'))
return false;
let id = app.get_id();
let favorites = AppFavorites.getAppFavorites().getFavoriteMap();
let srcIsFavorite = id in favorites;
let favPos = 0;
let children = this._box.get_children();
for (let i = 0; i < this._dragPlaceholderPos; i++) {
if (this._dragPlaceholder &&
children[i] == this._dragPlaceholder)
continue;
let childId = children[i].child._delegate.app.get_id();
if (childId == id)
continue;
if (childId in favorites)
favPos++;
}
// No drag placeholder means we don't want to favorite the app
// and we are dragging it to its original position
if (!this._dragPlaceholder)
return true;
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
let appFavorites = AppFavorites.getAppFavorites();
if (srcIsFavorite)
appFavorites.moveFavoriteToPos(id, favPos);
else
appFavorites.addFavoriteAtPos(id, favPos);
return false;
});
return true;
}
});