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workspacesView: Update scroll position but not workspace on allocate

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Not updating the scroll position on allocate caused a glitch, where a
window on a workspace that is not the first one would would be
transparent for one frame when showing the overview.

Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3507
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1545>
This commit is contained in:
Jonas Ådahl 2020-12-18 16:21:58 +01:00
parent 15aabdf287
commit 1685c77931
1 changed files with 13 additions and 18 deletions
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29
js/ui/workspacesView.js
View File

@ -78,11 +78,10 @@ class WorkspacesView extends WorkspacesViewBase {
this._animating = false; // tweening
this._gestureActive = false; // touch(pad) gestures
this._updateScrollPositionId = 0;
this._scrollAdjustment = scrollAdjustment;
this._onScrollId = this._scrollAdjustment.connect('notify::value',
this._updateScrollPosition.bind(this));
this._onScrollAdjustmentChanged.bind(this));
this._workspaces = [];
this._updateWorkspaces();
@ -125,14 +124,7 @@ class WorkspacesView extends WorkspacesViewBase {
child.allocate_available_size(x, y, box.get_width(), box.get_height());
});
// Update scroll position in an idle callback to avoid unintended
// side effects (e.g. workspace switch) during layout.
this._updateScrollPositionId =
GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
this._updateScrollPositionId = 0;
this._updateScrollPosition();
return GLib.SOURCE_REMOVE;
});
}
getActiveWorkspace() {
@ -240,8 +232,6 @@ class WorkspacesView extends WorkspacesViewBase {
_onDestroy() {
super._onDestroy();
if (this._updateScrollPositionId)
GLib.source_remove(this._updateScrollPositionId);
this._scrollAdjustment.disconnect(this._onScrollId);
global.window_manager.disconnect(this._switchWorkspaceNotifyId);
let workspaceManager = global.workspace_manager;
@ -265,15 +255,10 @@ class WorkspacesView extends WorkspacesViewBase {
// sync the workspaces' positions to the value of the scroll adjustment
// and change the active workspace if appropriate
_updateScrollPosition() {
_onScrollAdjustmentChanged() {
if (!this.has_allocation())
return;
if (this._updateScrollPositionId) {
GLib.source_remove(this._updateScrollPositionId);
this._updateScrollPositionId = 0;
}
const adj = this._scrollAdjustment;
const allowSwitch =
adj.get_transition('value') === null && !this._gestureActive;
@ -296,9 +281,19 @@ class WorkspacesView extends WorkspacesViewBase {
metaWorkspace.activate(global.get_current_time());
}
this._updateScrollPosition();
}
_updateScrollPosition() {
if (!this.has_allocation())
return;
const adj = this._scrollAdjustment;
if (adj.upper == 1)
return;
const workspaceManager = global.workspace_manager;
const vertical = workspaceManager.layout_rows === -1;
const rtl = this.text_direction === Clutter.TextDirection.RTL;
const progress = vertical || !rtl