gnome-shell/js/ui/overviewControls.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const GObject = imports.gi.GObject;
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const St = imports.gi.St;
const Shell = imports.gi.Shell;
const Dash = imports.ui.dash;
const Main = imports.ui.main;
const Params = imports.misc.params;
const Tweener = imports.ui.tweener;
const ViewSelector = imports.ui.viewSelector;
const WorkspaceThumbnail = imports.ui.workspaceThumbnail;
const SIDE_CONTROLS_ANIMATION_TIME = 0.16;
function getRtlSlideDirection(direction, actor) {
let rtl = (actor.text_direction == Clutter.TextDirection.RTL);
if (rtl)
direction = (direction == SlideDirection.LEFT) ?
SlideDirection.RIGHT : SlideDirection.LEFT;
return direction;
};
const SlideDirection = {
LEFT: 0,
RIGHT: 1
};
const SlideLayout = new Lang.Class({
Name: 'SlideLayout',
Extends: Clutter.FixedLayout,
_init: function(params) {
this._slideX = 1;
this._translationX = 0;
this._direction = SlideDirection.LEFT;
this.parent(params);
},
vfunc_get_preferred_width: function(container, forHeight) {
let child = container.get_first_child();
let [minWidth, natWidth] = child.get_preferred_width(forHeight);
minWidth *= this._slideX;
natWidth *= this._slideX;
return [minWidth, natWidth];
},
vfunc_allocate: function(container, box, flags) {
let child = container.get_first_child();
let availWidth = Math.round(box.x2 - box.x1);
let availHeight = Math.round(box.y2 - box.y1);
let [, natWidth] = child.get_preferred_width(availHeight);
// Align the actor inside the clipped box, as the actor's alignment
// flags only determine what to do if the allocated box is bigger
// than the actor's box.
let realDirection = getRtlSlideDirection(this._direction, child);
let alignX = (realDirection == SlideDirection.LEFT) ? (availWidth - natWidth) : 0;
let actorBox = new Clutter.ActorBox();
actorBox.x1 = box.x1 + alignX + this._translationX;
actorBox.x2 = actorBox.x1 + (child.x_expand ? availWidth : natWidth);
actorBox.y1 = box.y1;
actorBox.y2 = actorBox.y1 + availHeight;
child.allocate(actorBox, flags);
},
set slideX(value) {
this._slideX = value;
this.layout_changed();
},
get slideX() {
return this._slideX;
},
set slideDirection(direction) {
this._direction = direction;
this.layout_changed();
},
get slideDirection() {
return this._direction;
},
set translationX(value) {
this._translationX = value;
this.layout_changed();
},
get translationX() {
return this._translationX;
},
});
const SlidingControl = new Lang.Class({
Name: 'SlidingControl',
_init: function(params) {
params = Params.parse(params, { slideDirection: SlideDirection.LEFT });
this._visible = true;
this._inDrag = false;
this.layout = new SlideLayout();
this.layout.slideDirection = params.slideDirection;
this.actor = new St.Widget({ layout_manager: this.layout,
style_class: 'overview-controls',
clip_to_allocation: true });
Main.overview.connect('showing', Lang.bind(this, this._onOverviewShowing));
Main.overview.connect('hiding', Lang.bind(this, this._onOverviewHiding));
Main.overview.connect('item-drag-begin', Lang.bind(this, this._onDragBegin));
Main.overview.connect('item-drag-end', Lang.bind(this, this._onDragEnd));
Main.overview.connect('item-drag-cancelled', Lang.bind(this, this._onDragEnd));
Main.overview.connect('window-drag-begin', Lang.bind(this, this._onWindowDragBegin));
Main.overview.connect('window-drag-cancelled', Lang.bind(this, this._onWindowDragEnd));
Main.overview.connect('window-drag-end', Lang.bind(this, this._onWindowDragEnd));
},
_getSlide: function() {
throw new Error('getSlide() must be overridden');
},
_updateSlide: function() {
Tweener.addTween(this.layout, { slideX: this._getSlide(),
time: SIDE_CONTROLS_ANIMATION_TIME,
transition: 'easeOutQuad' });
},
getVisibleWidth: function() {
let child = this.actor.get_first_child();
let [, , natWidth, ] = child.get_preferred_size();
return natWidth;
},
_getTranslation: function() {
let child = this.actor.get_first_child();
let direction = getRtlSlideDirection(this.layout.slideDirection, child);
let visibleWidth = this.getVisibleWidth();
if (direction == SlideDirection.LEFT)
return - visibleWidth;
else
return visibleWidth;
},
_updateTranslation: function() {
let translationStart = 0;
let translationEnd = 0;
let translation = this._getTranslation();
if (this._visible) {
translationStart = translation;
} else {
translationEnd = translation;
}
if (this.layout.translationX == translationEnd)
return;
this.layout.translationX = translationStart;
Tweener.addTween(this.layout, { translationX: translationEnd,
time: SIDE_CONTROLS_ANIMATION_TIME,
transition: 'easeOutQuad' });
},
_onOverviewShowing: function() {
this._visible = true;
this.layout.slideX = this._getSlide();
this.layout.translationX = this._getTranslation();
this.slideIn();
},
_onOverviewHiding: function() {
this.slideOut();
},
_onWindowDragBegin: function() {
this._onDragBegin();
},
_onWindowDragEnd: function() {
this._onDragEnd();
},
_onDragBegin: function() {
this._inDrag = true;
this.layout.translationX = 0;
this._updateSlide();
},
_onDragEnd: function() {
this._inDrag = false;
this._updateSlide();
},
fadeIn: function() {
Tweener.addTween(this.actor, { opacity: 255,
time: SIDE_CONTROLS_ANIMATION_TIME / 2,
transition: 'easeInQuad'
});
},
fadeHalf: function() {
Tweener.addTween(this.actor, { opacity: 128,
time: SIDE_CONTROLS_ANIMATION_TIME / 2,
transition: 'easeOutQuad'
});
},
slideIn: function() {
this._visible = true;
this._updateTranslation();
// we will update slideX and the translation from pageEmpty
},
slideOut: function() {
this._visible = false;
this._updateTranslation();
// we will update slideX from pageEmpty
},
pageEmpty: function() {
// When pageEmpty is received, there's no visible view in the
// selector; this means we can now safely set the full slide for
// the next page, since slideIn or slideOut might have been called,
// changing the visiblity
this.layout.slideX = this._getSlide();
this._updateTranslation();
}
});
const ThumbnailsSlider = new Lang.Class({
Name: 'ThumbnailsSlider',
Extends: SlidingControl,
_init: function(thumbnailsBox) {
this.parent({ slideDirection: SlideDirection.RIGHT });
this._thumbnailsBox = thumbnailsBox;
this.actor.request_mode = Clutter.RequestMode.WIDTH_FOR_HEIGHT;
this.actor.reactive = true;
this.actor.track_hover = true;
this.actor.add_actor(this._thumbnailsBox.actor);
Main.layoutManager.connect('monitors-changed', Lang.bind(this, this._updateSlide));
this.actor.connect('notify::hover', Lang.bind(this, this._updateSlide));
global.window_manager.connect('switch-workspace', Lang.bind(this, this._updateSlide));
this._thumbnailsBox.actor.bind_property('visible', this.actor, 'visible', GObject.BindingFlags.SYNC_CREATE);
},
_getAlwaysZoomOut: function() {
// Always show the pager when hover, during a drag, or if workspaces are
// actually used, e.g. there are windows on any non-active workspace
let alwaysZoomOut = this.actor.hover ||
this._inDrag ||
!Meta.prefs_get_dynamic_workspaces() ||
global.screen.n_workspaces > 2 ||
global.screen.get_active_workspace_index() != 0;
if (!alwaysZoomOut) {
let monitors = Main.layoutManager.monitors;
let primary = Main.layoutManager.primaryMonitor;
/* Look for any monitor to the right of the primary, if there is
* one, we always keep zoom out, otherwise its hard to reach
* the thumbnail area without passing into the next monitor. */
for (let i = 0; i < monitors.length; i++) {
if (monitors[i].x >= primary.x + primary.width) {
alwaysZoomOut = true;
break;
}
}
}
return alwaysZoomOut;
},
getNonExpandedWidth: function() {
let child = this.actor.get_first_child();
return child.get_theme_node().get_length('visible-width');
},
_getSlide: function() {
if (!this._visible)
return 0;
let alwaysZoomOut = this._getAlwaysZoomOut();
if (alwaysZoomOut)
return 1;
let child = this.actor.get_first_child();
let preferredHeight = child.get_preferred_height(-1)[1];
let expandedWidth = child.get_preferred_width(preferredHeight)[1];
return this.getNonExpandedWidth() / expandedWidth;
},
getVisibleWidth: function() {
let alwaysZoomOut = this._getAlwaysZoomOut();
if (alwaysZoomOut)
return this.parent();
else
return this.getNonExpandedWidth();
}
});
const DashSlider = new Lang.Class({
Name: 'DashSlider',
Extends: SlidingControl,
_init: function(dash) {
this.parent({ slideDirection: SlideDirection.LEFT });
this._dash = dash;
// SlideLayout reads the actor's expand flags to decide
// whether to allocate the natural size to its child, or the whole
// available allocation
this._dash.actor.x_expand = true;
this.actor.x_expand = true;
this.actor.x_align = Clutter.ActorAlign.START;
this.actor.y_expand = true;
this.actor.add_actor(this._dash.actor);
this._dash.connect('icon-size-changed', Lang.bind(this, this._updateSlide));
},
_getSlide: function() {
if (this._visible || this._inDrag)
return 1;
else
return 0;
},
_onWindowDragBegin: function() {
this.fadeHalf();
},
_onWindowDragEnd: function() {
this.fadeIn();
}
});
const DashSpacer = new Lang.Class({
Name: 'DashSpacer',
Extends: St.Widget,
_init: function(params) {
this.parent(params);
this._bindConstraint = null;
},
setDashActor: function(dashActor) {
if (this._bindConstraint) {
this.remove_constraint(this._bindConstraint);
this._bindConstraint = null;
}
if (dashActor) {
this._bindConstraint = new Clutter.BindConstraint({ source: dashActor,
coordinate: Clutter.BindCoordinate.SIZE });
this.add_constraint(this._bindConstraint);
}
},
vfunc_get_preferred_width: function(forHeight) {
let box = this.get_allocation_box();
let minWidth = this.parent(forHeight)[0];
let natWidth = box.x2 - box.x1;
return [minWidth, natWidth];
},
vfunc_get_preferred_height: function(forWidth) {
let box = this.get_allocation_box();
let minHeight = this.parent(forWidth)[0];
let natHeight = box.y2 - box.y1;
return [minHeight, natHeight];
}
});
const ControlsLayout = new Lang.Class({
Name: 'ControlsLayout',
Extends: Clutter.BinLayout,
Signals: { 'allocation-changed': { flags: GObject.SignalFlags.RUN_LAST } },
vfunc_allocate: function(container, box, flags) {
this.parent(container, box, flags);
this.emit('allocation-changed');
}
});
const ControlsManager = new Lang.Class({
Name: 'ControlsManager',
_init: function(searchEntry) {
this.dash = new Dash.Dash();
this._dashSlider = new DashSlider(this.dash);
this._dashSpacer = new DashSpacer();
this._dashSpacer.setDashActor(this._dashSlider.actor);
this._thumbnailsBox = new WorkspaceThumbnail.ThumbnailsBox();
this._thumbnailsSlider = new ThumbnailsSlider(this._thumbnailsBox);
this.viewSelector = new ViewSelector.ViewSelector(searchEntry,
this.dash.showAppsButton);
this.viewSelector.connect('page-changed', Lang.bind(this, this._setVisibility));
this.viewSelector.connect('page-empty', Lang.bind(this, this._onPageEmpty));
let layout = new ControlsLayout();
this.actor = new St.Widget({ layout_manager: layout,
reactive: true,
x_expand: true, y_expand: true,
clip_to_allocation: true });
this._group = new St.BoxLayout({ name: 'overview-group',
x_expand: true, y_expand: true });
this.actor.add_actor(this._group);
this.actor.add_actor(this._dashSlider.actor);
this._group.add_actor(this._dashSpacer);
this._group.add(this.viewSelector.actor, { x_fill: true,
expand: true });
this._group.add_actor(this._thumbnailsSlider.actor);
layout.connect('allocation-changed', Lang.bind(this, this._updateWorkspacesGeometry));
Main.overview.connect('showing', Lang.bind(this, this._updateSpacerVisibility));
Main.overview.connect('item-drag-begin', Lang.bind(this,
function() {
let activePage = this.viewSelector.getActivePage();
if (activePage != ViewSelector.ViewPage.WINDOWS)
this.viewSelector.fadeHalf();
}));
Main.overview.connect('item-drag-end', Lang.bind(this,
function() {
this.viewSelector.fadeIn();
}));
Main.overview.connect('item-drag-cancelled', Lang.bind(this,
function() {
this.viewSelector.fadeIn();
}));
},
_updateWorkspacesGeometry: function() {
let [x, y] = this.actor.get_transformed_position();
let [width, height] = this.actor.get_transformed_size();
let geometry = { x: x, y: y, width: width, height: height };
let spacing = this.actor.get_theme_node().get_length('spacing');
let dashWidth = this._dashSlider.getVisibleWidth() + spacing;
let thumbnailsWidth = this._thumbnailsSlider.getNonExpandedWidth() + spacing;
geometry.width -= dashWidth;
geometry.width -= thumbnailsWidth;
if (this.actor.get_text_direction() == Clutter.TextDirection.LTR)
geometry.x += dashWidth;
else
geometry.x += thumbnailsWidth;
this.viewSelector.setWorkspacesFullGeometry(geometry);
},
_setVisibility: function() {
// Ignore the case when we're leaving the overview, since
// actors will be made visible again when entering the overview
// next time, and animating them while doing so is just
// unnecessary noise
if (!Main.overview.visible ||
(Main.overview.animationInProgress && !Main.overview.visibleTarget))
return;
let activePage = this.viewSelector.getActivePage();
let dashVisible = (activePage == ViewSelector.ViewPage.WINDOWS ||
activePage == ViewSelector.ViewPage.APPS);
let thumbnailsVisible = (activePage == ViewSelector.ViewPage.WINDOWS);
if (dashVisible)
this._dashSlider.slideIn();
else
this._dashSlider.slideOut();
if (thumbnailsVisible)
this._thumbnailsSlider.slideIn();
else
this._thumbnailsSlider.slideOut();
},
_updateSpacerVisibility: function() {
if (Main.overview.animationInProgress && !Main.overview.visibleTarget)
return;
let activePage = this.viewSelector.getActivePage();
this._dashSpacer.visible = (activePage == ViewSelector.ViewPage.WINDOWS);
},
_onPageEmpty: function() {
this._dashSlider.pageEmpty();
this._thumbnailsSlider.pageEmpty();
this._updateSpacerVisibility();
}
});