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magnifier: Track cursor sprite changes only when active

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There's no point in keeping the cursor sprite texture around all the time,
and to listen for its changes, we just need this when the magnifier is active.

So, initialize the magnifier texture and monitor for the sprite changes on
activation, while disconnect from the signal and nullify the texture when
the magnifier is deactivated.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/443
This commit is contained in:
Marco Trevisan (Treviño) 2019-03-11 17:09:08 -04:00
parent 8146e9d527
commit 9158f55360
1 changed files with 7 additions and 4 deletions
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11
js/ui/magnifier.js
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@ -88,7 +88,7 @@ var MouseSpriteContent = GObject.registerClass({
this._texture = coglTexture;
this.invalidate();
if (!oldTexture ||
if (!oldTexture || !coglTexture ||
oldTexture.get_width() != coglTexture.get_width() ||
oldTexture.get_height() != coglTexture.get_height())
this.invalidate_size();
@ -106,7 +106,6 @@ var Magnifier = class Magnifier {
this._mouseSprite = new Clutter.Actor({ request_mode: Clutter.RequestMode.CONTENT_SIZE });
this._mouseSprite.content = new MouseSpriteContent();
this._updateSpriteTexture();
this._cursorRoot = new Clutter.Actor();
this._cursorRoot.add_actor(this._mouseSprite);
@ -122,8 +121,6 @@ var Magnifier = class Magnifier {
let showAtLaunch = this._settingsInit(aZoomRegion);
aZoomRegion.scrollContentsTo(this.xMouse, this.yMouse);
cursorTracker.connect('cursor-changed', this._updateMouseSprite.bind(this));
// Export to dbus.
magDBusService = new MagnifierDBus.ShellMagnifier();
this.setActive(showAtLaunch);
@ -159,9 +156,15 @@ var Magnifier = class Magnifier {
if (isActive != activate) {
if (activate) {
this._updateMouseSprite();
this._cursorSpriteChangedId =
this._cursorTracker.connect('cursor-changed',
this._updateMouseSprite.bind(this));
Meta.disable_unredirect_for_display(global.display);
this.startTrackingMouse();
} else {
this._cursorTracker.disconnect(this._cursorSpriteChangedId);
this._mouseSprite.content.texture = null;
Meta.enable_unredirect_for_display(global.display);
this.stopTrackingMouse();
}