gnome-shell/js/ui/workspacesView.js
Giovanni Campagna 1b152e6bd0 WorkspacesView: fix removal of workspaces that are not at the end
Workspaces can removed from any index, and in particular they
will be removed by the WorkspaceTracker if they stop containing
windows at some point. Make sure WorkspacesView is not confused
and destroyes the right Workspace objects.

https://bugzilla.gnome.org/show_bug.cgi?id=721417
2014-01-03 22:46:45 +01:00

638 lines
22 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const GObject = imports.gi.GObject;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const Signals = imports.signals;
const DND = imports.ui.dnd;
const Main = imports.ui.main;
const Overview = imports.ui.overview;
const Tweener = imports.ui.tweener;
const Workspace = imports.ui.workspace;
const WorkspaceThumbnail = imports.ui.workspaceThumbnail;
const WORKSPACE_SWITCH_TIME = 0.25;
// Note that mutter has a compile-time limit of 36
const MAX_WORKSPACES = 16;
const OVERRIDE_SCHEMA = 'org.gnome.shell.overrides';
const WorkspacesViewBase = new Lang.Class({
Name: 'WorkspacesViewBase',
_init: function(monitorIndex) {
this.actor = new St.Widget({ style_class: 'workspaces-view',
reactive: true });
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
global.focus_manager.add_group(this.actor);
// The actor itself isn't a drop target, so we don't want to pick on its area
this.actor.set_size(0, 0);
this._monitorIndex = monitorIndex;
this._fullGeometry = null;
this._actualGeometry = null;
this._inDrag = false;
this._windowDragBeginId = Main.overview.connect('window-drag-begin', Lang.bind(this, this._dragBegin));
this._windowDragEndId = Main.overview.connect('window-drag-end', Lang.bind(this, this._dragEnd));
},
_onDestroy: function() {
this._dragEnd();
if (this._windowDragBeginId > 0) {
Main.overview.disconnect(this._windowDragBeginId);
this._windowDragBeginId = 0;
}
if (this._windowDragEndId > 0) {
Main.overview.disconnect(this._windowDragEndId);
this._windowDragEndId = 0;
}
},
_dragBegin: function(overview, clone) {
this._inDrag = true;
this._setReservedSlot(clone);
},
_dragEnd: function() {
this._inDrag = false;
this._setReservedSlot(null);
},
destroy: function() {
this.actor.destroy();
},
setFullGeometry: function(geom) {
this._fullGeometry = geom;
this._syncGeometry();
},
setActualGeometry: function(geom) {
this._actualGeometry = geom;
this._syncGeometry();
},
});
const WorkspacesView = new Lang.Class({
Name: 'WorkspacesView',
Extends: WorkspacesViewBase,
_init: function(monitorIndex) {
this.parent(monitorIndex);
this._animating = false; // tweening
this._scrolling = false; // swipe-scrolling
this._animatingScroll = false; // programatically updating the adjustment
this._settings = new Gio.Settings({ schema: OVERRIDE_SCHEMA });
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
this.scrollAdjustment = new St.Adjustment({ value: activeWorkspaceIndex,
lower: 0,
page_increment: 1,
page_size: 1,
step_increment: 0,
upper: 0 });
this.scrollAdjustment.connect('notify::value',
Lang.bind(this, this._onScroll));
this._workspaces = [];
this._updateWorkspaces();
this._updateWorkspacesId = global.screen.connect('notify::n-workspaces', Lang.bind(this, this._updateWorkspaces));
this._overviewShownId =
Main.overview.connect('shown',
Lang.bind(this, function() {
this.actor.set_clip(this._fullGeometry.x, this._fullGeometry.y,
this._fullGeometry.width, this._fullGeometry.height);
}));
this._switchWorkspaceNotifyId =
global.window_manager.connect('switch-workspace',
Lang.bind(this, this._activeWorkspaceChanged));
},
_setReservedSlot: function(clone) {
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].setReservedSlot(clone);
},
_syncGeometry: function() {
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].setFullGeometry(this._fullGeometry);
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].setActualGeometry(this._actualGeometry);
},
getActiveWorkspace: function() {
let active = global.screen.get_active_workspace_index();
return this._workspaces[active];
},
zoomToOverview: function() {
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomToOverview();
this._updateWorkspaceActors(false);
},
zoomFromOverview: function() {
this.actor.remove_clip();
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomFromOverview();
},
syncStacking: function(stackIndices) {
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].syncStacking(stackIndices);
},
_scrollToActive: function() {
let active = global.screen.get_active_workspace_index();
this._updateWorkspaceActors(true);
this._updateScrollAdjustment(active);
},
// Update workspace actors parameters
// @showAnimation: iff %true, transition between states
_updateWorkspaceActors: function(showAnimation) {
let active = global.screen.get_active_workspace_index();
this._animating = showAnimation;
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
Tweener.removeTweens(workspace.actor);
let y = (w - active) * this._fullGeometry.height;
if (showAnimation) {
let params = { y: y,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad'
};
// we have to call _updateVisibility() once before the
// animation and once afterwards - it does not really
// matter which tween we use, so we pick the first one ...
if (w == 0) {
this._updateVisibility();
params.onComplete = Lang.bind(this,
function() {
this._animating = false;
this._updateVisibility();
});
}
Tweener.addTween(workspace.actor, params);
} else {
workspace.actor.set_position(0, y);
if (w == 0)
this._updateVisibility();
}
}
},
_updateVisibility: function() {
let active = global.screen.get_active_workspace_index();
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
if (this._animating || this._scrolling) {
workspace.actor.show();
} else {
if (this._inDrag)
workspace.actor.visible = (Math.abs(w - active) <= 1);
else
workspace.actor.visible = (w == active);
}
}
},
_updateScrollAdjustment: function(index) {
if (this._scrolling)
return;
this._animatingScroll = true;
Tweener.addTween(this.scrollAdjustment, {
value: index,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this._animatingScroll = false;
})
});
},
_updateWorkspaces: function() {
let newNumWorkspaces = global.screen.n_workspaces;
this.scrollAdjustment.upper = newNumWorkspaces;
let needsUpdate = false;
for (let j = 0; j < newNumWorkspaces; j++) {
let metaWorkspace = global.screen.get_workspace_by_index(j);
let workspace;
if (j >= this._workspaces.length) { /* added */
workspace = new Workspace.Workspace(metaWorkspace, this._monitorIndex);
this.actor.add_actor(workspace.actor);
this._workspaces[j] = workspace;
} else {
workspace = this._workspaces[j];
if (workspace.metaWorkspace != metaWorkspace) { /* removed */
workspace.destroy();
this._workspaces.splice(j, 1);
} /* else kept */
}
}
if (this._fullGeometry)
this._updateWorkspaceActors(false);
this._syncGeometry();
},
_activeWorkspaceChanged: function(wm, from, to, direction) {
if (this._scrolling)
return;
this._scrollToActive();
},
_onDestroy: function() {
this.parent();
this.scrollAdjustment.run_dispose();
Main.overview.disconnect(this._overviewShownId);
global.window_manager.disconnect(this._switchWorkspaceNotifyId);
global.screen.disconnect(this._updateWorkspacesId);
},
startSwipeScroll: function() {
this._scrolling = true;
},
endSwipeScroll: function() {
this._scrolling = false;
// Make sure title captions etc are shown as necessary
this._scrollToActive();
this._updateVisibility();
},
// sync the workspaces' positions to the value of the scroll adjustment
// and change the active workspace if appropriate
_onScroll: function(adj) {
if (this._animatingScroll)
return;
let active = global.screen.get_active_workspace_index();
let current = Math.round(adj.value);
if (active != current) {
if (!this._workspaces[current]) {
// The current workspace was destroyed. This could happen
// when you are on the last empty workspace, and consolidate
// windows using the thumbnail bar.
// In that case, the intended behavior is to stay on the empty
// workspace, which is the last one, so pick it.
current = this._workspaces.length - 1;
}
let metaWorkspace = this._workspaces[current].metaWorkspace;
metaWorkspace.activate(global.get_current_time());
}
let last = this._workspaces.length - 1;
let firstWorkspaceY = this._workspaces[0].actor.y;
let lastWorkspaceY = this._workspaces[last].actor.y;
let workspacesHeight = lastWorkspaceY - firstWorkspaceY;
if (adj.upper == 1)
return;
let currentY = firstWorkspaceY;
let newY = - adj.value / (adj.upper - 1) * workspacesHeight;
let dy = newY - currentY;
for (let i = 0; i < this._workspaces.length; i++) {
this._workspaces[i].actor.visible = Math.abs(i - adj.value) <= 1;
this._workspaces[i].actor.y += dy;
}
},
});
Signals.addSignalMethods(WorkspacesView.prototype);
const ExtraWorkspaceView = new Lang.Class({
Name: 'ExtraWorkspaceView',
Extends: WorkspacesViewBase,
_init: function(monitorIndex) {
this.parent(monitorIndex);
this._workspace = new Workspace.Workspace(null, monitorIndex);
this.actor.add_actor(this._workspace.actor);
},
_setReservedSlot: function(clone) {
this._workspace.setReservedSlot(clone);
},
_syncGeometry: function() {
this._workspace.setFullGeometry(this._fullGeometry);
this._workspace.setActualGeometry(this._actualGeometry);
},
zoomToOverview: function() {
this._workspace.zoomToOverview();
},
zoomFromOverview: function() {
this._workspace.zoomFromOverview();
},
syncStacking: function(stackIndices) {
this._workspace.syncStacking(stackIndices);
},
startSwipeScroll: function() {
},
endSwipeScroll: function() {
},
});
const DelegateFocusNavigator = new Lang.Class({
Name: 'DelegateFocusNavigator',
Extends: St.Widget,
vfunc_navigate_focus: function(from, direction) {
return this._delegate.navigateFocus(from, direction);
},
});
const WorkspacesDisplay = new Lang.Class({
Name: 'WorkspacesDisplay',
_init: function() {
this.actor = new DelegateFocusNavigator({ clip_to_allocation: true });
this.actor._delegate = this;
this.actor.connect('notify::allocation', Lang.bind(this, this._updateWorkspacesActualGeometry));
this.actor.connect('parent-set', Lang.bind(this, this._parentSet));
let clickAction = new Clutter.ClickAction()
clickAction.connect('clicked', Lang.bind(this, function(action) {
// Only switch to the workspace when there's no application
// windows open. The problem is that it's too easy to miss
// an app window and get the wrong one focused.
if (action.get_button() == 1 &&
this._getPrimaryView().getActiveWorkspace().isEmpty())
Main.overview.hide();
}));
Main.overview.addAction(clickAction);
this.actor.bind_property('mapped', clickAction, 'enabled', GObject.BindingFlags.SYNC_CREATE);
let panAction = new Clutter.PanAction();
panAction.connect('pan', Lang.bind(this, this._onPan));
panAction.connect('gesture-begin', Lang.bind(this, function() {
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].startSwipeScroll();
return true;
}));
panAction.connect('gesture-cancel', Lang.bind(this, function() {
clickAction.release();
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].endSwipeScroll();
}));
panAction.connect('gesture-end', Lang.bind(this, function() {
clickAction.release();
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].endSwipeScroll();
}));
Main.overview.addAction(panAction);
this.actor.bind_property('mapped', panAction, 'enabled', GObject.BindingFlags.SYNC_CREATE);
this._primaryIndex = Main.layoutManager.primaryIndex;
this._workspacesViews = [];
this._primaryScrollAdjustment = null;
this._settings = new Gio.Settings({ schema: OVERRIDE_SCHEMA });
this._settings.connect('changed::workspaces-only-on-primary',
Lang.bind(this,
this._workspacesOnlyOnPrimaryChanged));
this._workspacesOnlyOnPrimaryChanged();
this._switchWorkspaceNotifyId = 0;
this._notifyOpacityId = 0;
this._scrollEventId = 0;
this._fullGeometry = null;
},
_onPan: function(action) {
let [dist, dx, dy] = action.get_motion_delta(0);
let adjustment = this._scrollAdjustment;
adjustment.value -= (dy / this.actor.height) * adjustment.page_size;
return false;
},
navigateFocus: function(from, direction) {
return this._getPrimaryView().actor.navigate_focus(from, direction, false);
},
show: function() {
this._updateWorkspacesViews();
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].zoomToOverview();
this._restackedNotifyId =
Main.overview.connect('windows-restacked',
Lang.bind(this, this._onRestacked));
if (this._scrollEventId == 0)
this._scrollEventId = Main.overview.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
},
zoomFromOverview: function() {
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].zoomFromOverview();
},
hide: function() {
if (this._restackedNotifyId > 0){
Main.overview.disconnect(this._restackedNotifyId);
this._restackedNotifyId = 0;
}
if (this._scrollEventId > 0) {
Main.overview.disconnect(this._scrollEventId);
this._scrollEventId = 0;
}
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].destroy();
this._workspacesViews = [];
},
_workspacesOnlyOnPrimaryChanged: function() {
this._workspacesOnlyOnPrimary = this._settings.get_boolean('workspaces-only-on-primary');
if (!Main.overview.visible)
return;
this._updateWorkspacesViews();
},
_updateWorkspacesViews: function() {
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].destroy();
this._workspacesViews = [];
let monitors = Main.layoutManager.monitors;
for (let i = 0; i < monitors.length; i++) {
let view;
if (this._workspacesOnlyOnPrimary && i != this._primaryIndex)
view = new ExtraWorkspaceView(i);
else
view = new WorkspacesView(i);
view.actor.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
if (i == this._primaryIndex) {
this._scrollAdjustment = view.scrollAdjustment;
this._scrollAdjustment.connect('notify::value',
Lang.bind(this, this._scrollValueChanged));
}
this._workspacesViews.push(view);
Main.layoutManager.overviewGroup.add_actor(view.actor);
}
this._updateWorkspacesFullGeometry();
this._updateWorkspacesActualGeometry();
},
_scrollValueChanged: function() {
for (let i = 0; i < this._workspacesViews.length; i++) {
if (i == this._primaryIndex)
continue;
let adjustment = this._workspacesViews[i].scrollAdjustment;
if (!adjustment)
continue;
// the adjustments work in terms of workspaces, so the
// values map directly
adjustment.value = this._scrollAdjustment.value;
}
},
_getPrimaryView: function() {
if (!this._workspacesViews.length)
return null;
return this._workspacesViews[this._primaryIndex];
},
activeWorkspaceHasMaximizedWindows: function() {
return this._getPrimaryView().getActiveWorkspace().hasMaximizedWindows();
},
_parentSet: function(actor, oldParent) {
if (oldParent && this._notifyOpacityId)
oldParent.disconnect(this._notifyOpacityId);
this._notifyOpacityId = 0;
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, Lang.bind(this,
function() {
let newParent = this.actor.get_parent();
if (!newParent)
return;
// This is kinda hackish - we want the primary view to
// appear as parent of this.actor, though in reality it
// is added directly to Main.layoutManager.overviewGroup
this._notifyOpacityId = newParent.connect('notify::opacity',
Lang.bind(this, function() {
let opacity = this.actor.get_parent().opacity;
let primaryView = this._getPrimaryView();
if (!primaryView)
return;
primaryView.actor.opacity = opacity;
primaryView.actor.visible = opacity != 0;
}));
}));
},
// This geometry should always be the fullest geometry
// the workspaces switcher can ever be allocated, as if
// the sliding controls were never slid in at all.
setWorkspacesFullGeometry: function(geom) {
this._fullGeometry = geom;
this._updateWorkspacesFullGeometry();
},
_updateWorkspacesFullGeometry: function() {
if (!this._workspacesViews.length)
return;
let monitors = Main.layoutManager.monitors;
for (let i = 0; i < monitors.length; i++) {
let geometry = (i == this._primaryIndex) ? this._fullGeometry : monitors[i];
this._workspacesViews[i].setFullGeometry(geometry);
}
},
_updateWorkspacesActualGeometry: function() {
if (!this._workspacesViews.length)
return;
let [x, y] = this.actor.get_transformed_position();
let width = this.actor.allocation.x2 - this.actor.allocation.x1;
let height = this.actor.allocation.y2 - this.actor.allocation.y1;
let primaryGeometry = { x: x, y: y, width: width, height: height };
let monitors = Main.layoutManager.monitors;
for (let i = 0; i < monitors.length; i++) {
let geometry = (i == this._primaryIndex) ? primaryGeometry : monitors[i];
this._workspacesViews[i].setActualGeometry(geometry);
}
},
_onRestacked: function(overview, stackIndices) {
for (let i = 0; i < this._workspacesViews.length; i++)
this._workspacesViews[i].syncStacking(stackIndices);
},
_onScrollEvent: function(actor, event) {
if (!this.actor.mapped)
return Clutter.EVENT_PROPAGATE;
let activeWs = global.screen.get_active_workspace();
let ws;
switch (event.get_scroll_direction()) {
case Clutter.ScrollDirection.UP:
ws = activeWs.get_neighbor(Meta.MotionDirection.UP);
break;
case Clutter.ScrollDirection.DOWN:
ws = activeWs.get_neighbor(Meta.MotionDirection.DOWN);
break;
default:
return Clutter.EVENT_PROPAGATE;
}
Main.wm.actionMoveWorkspace(ws);
return Clutter.EVENT_STOP;
}
});
Signals.addSignalMethods(WorkspacesDisplay.prototype);