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import GObject from 'gi://GObject';
import Clutter from 'gi://Clutter';
export const PaintSignals = class PaintSignals {
constructor(connections) {
this.buffer = [];
this.connections = connections;
}
connect(actor, blur_effect) {
let paint_effect = new EmitPaintSignal();
let infos = {
actor: actor,
paint_effect: paint_effect
};
let counter = 0;
actor.add_effect(paint_effect);
this.connections.connect(paint_effect, 'update-blur', () => {
try {
// checking if blur_effect.queue_repaint() has been recently called
if (counter === 0) {
counter = 2;
blur_effect.queue_repaint();
}
else counter--;
} catch (e) { }
});
// remove the actor from buffer when it is destroyed
if (
actor.connect &&
(
!(actor instanceof GObject.Object) ||
GObject.signal_lookup('destroy', actor)
)
)
this.connections.connect(actor, 'destroy', () => {
const immutable_buffer = [...this.buffer];
immutable_buffer.forEach(infos => {
if (infos.actor === actor) {
// remove from buffer
let index = this.buffer.indexOf(infos);
this.buffer.splice(index, 1);
}
});
});
this.buffer.push(infos);
}
disconnect_all_for_actor(actor) {
const immutable_buffer = [...this.buffer];
immutable_buffer.forEach(infos => {
if (infos.actor === actor) {
this.connections.disconnect_all_for(infos.paint_effect);
infos.actor.remove_effect(infos.paint_effect);
// remove from buffer
let index = this.buffer.indexOf(infos);
this.buffer.splice(index, 1);
}
});
}
disconnect_all() {
this.buffer.forEach(infos => {
this.connections.disconnect_all_for(infos.paint_effect);
infos.actor.remove_effect(infos.paint_effect);
});
this.buffer = [];
}
};
export const EmitPaintSignal = GObject.registerClass({
GTypeName: 'EmitPaintSignal',
Signals: {
'update-blur': {
param_types: []
},
}
},
class EmitPaintSignal extends Clutter.Effect {
vfunc_paint(node, paint_context, paint_flags) {
this.emit("update-blur");
super.vfunc_paint(node, paint_context, paint_flags);
}
}
);
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