e5101eb407
Our animation code not only relies on the animation being loaded (which we handle), but also on having at least one frame - otherwise the computation of the next frame index will turn up NaN through division by zero. Guard against this case by treating empty animations as not loaded. https://bugzilla.gnome.org/show_bug.cgi?id=774805
89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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const GLib = imports.gi.GLib;
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const Lang = imports.lang;
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const Mainloop = imports.mainloop;
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const St = imports.gi.St;
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const Signals = imports.signals;
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const Atk = imports.gi.Atk;
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const ANIMATED_ICON_UPDATE_TIMEOUT = 16;
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const Animation = new Lang.Class({
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Name: 'Animation',
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_init: function(file, width, height, speed) {
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this.actor = new St.Bin();
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this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
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this._speed = speed;
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this._isLoaded = false;
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this._isPlaying = false;
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this._timeoutId = 0;
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this._frame = 0;
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let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
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this._animations = St.TextureCache.get_default().load_sliced_image (file, width, height, scaleFactor,
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Lang.bind(this, this._animationsLoaded));
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this.actor.set_child(this._animations);
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},
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play: function() {
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if (this._isLoaded && this._timeoutId == 0) {
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if (this._frame == 0)
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this._showFrame(0);
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this._timeoutId = GLib.timeout_add(GLib.PRIORITY_LOW, this._speed, Lang.bind(this, this._update));
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GLib.Source.set_name_by_id(this._timeoutId, '[gnome-shell] this._update');
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}
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this._isPlaying = true;
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},
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stop: function() {
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if (this._timeoutId > 0) {
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Mainloop.source_remove(this._timeoutId);
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this._timeoutId = 0;
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}
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this._isPlaying = false;
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},
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_showFrame: function(frame) {
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let oldFrameActor = this._animations.get_child_at_index(this._frame);
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if (oldFrameActor)
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oldFrameActor.hide();
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this._frame = (frame % this._animations.get_n_children());
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let newFrameActor = this._animations.get_child_at_index(this._frame);
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if (newFrameActor)
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newFrameActor.show();
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},
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_update: function() {
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this._showFrame(this._frame + 1);
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return GLib.SOURCE_CONTINUE;
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},
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_animationsLoaded: function() {
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this._isLoaded = this._animations.get_n_children() > 0;
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if (this._isPlaying)
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this.play();
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},
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_onDestroy: function() {
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this.stop();
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}
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});
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const AnimatedIcon = new Lang.Class({
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Name: 'AnimatedIcon',
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Extends: Animation,
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_init: function(file, size) {
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this.parent(file, size, size, ANIMATED_ICON_UPDATE_TIMEOUT);
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}
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});
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