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background: Group 'changed' signal emission

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Background is monitoring the whole `org.gnome.desktop.background` gsettings keys
for changes connecting to the non-specialized 'changed' signal and re-emitting
this as-is.
This means that when the background is changed via control-center, we get
multiple 'changed' signal events from GSettings, and for each one of this we
recreate a Background and a BackgroundActor.

Avoid this by using an idle to delay the emission of the 'changed' signal
grouping the events.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/558
This commit is contained in:
Marco Trevisan (Treviño) 2019-05-27 23:18:34 -05:00 committed by Marco Trevisan
parent a9234f7631
commit 7059e31f6a
1 changed files with 19 additions and 4 deletions
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23
js/ui/background.js
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@ -257,9 +257,8 @@ var Background = class Background {
this._refreshAnimation();
});
this._settingsChangedSignalId = this._settings.connect('changed', () => {
this.emit('changed');
});
this._settingsChangedSignalId =
this._settings.connect('changed', this._emitChangedSignal.bind(this));
this._load();
}
@ -290,6 +289,22 @@ var Background = class Background {
if (this._settingsChangedSignalId != 0)
this._settings.disconnect(this._settingsChangedSignalId);
this._settingsChangedSignalId = 0;
if (this._changedIdleId) {
GLib.source_remove(this._changedIdleId);
this._changedIdleId = 0;
}
}
_emitChangedSignal() {
if (this._changedIdleId)
return;
this._changedIdleId = GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
this._changedIdleId = 0;
this.emit('changed');
return GLib.SOURCE_REMOVE;
});
}
updateResolution() {
@ -345,7 +360,7 @@ var Background = class Background {
if (changedFile.equal(file)) {
let imageCache = Meta.BackgroundImageCache.get_default();
imageCache.purge(changedFile);
this.emit('changed');
this._emitChangedSignal();
}
});
this._fileWatches[key] = signalId;