background: add slide show support
gnome-desktop's background drawing code supports an XML format for presenting backgrounds based on time of day, monitor geometry, etc. Now that we don't use gnome-desktop for drawing the background, we need to implement that support ourselves to maintain feature parity. This commit implements that. https://bugzilla.gnome.org/show_bug.cgi?id=682429
This commit is contained in:
Ray Strode
parent
3c8325f1f3
commit
b1a6940188
@ -4,6 +4,7 @@ const Clutter = imports.gi.Clutter;
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const GDesktopEnums = imports.gi.GDesktopEnums;
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const Gio = imports.gi.Gio;
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const GLib = imports.gi.GLib;
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const GnomeDesktop = imports.gi.GnomeDesktop;
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const Lang = imports.lang;
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const Meta = imports.gi.Meta;
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const Signals = imports.signals;
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@ -23,6 +24,13 @@ const PICTURE_URI_KEY = 'picture-uri';
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const FADE_ANIMATION_TIME = 1.0;
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// These parameters affect how often we redraw.
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// The first is how different (percent crossfaded) the slide show
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// has to look before redrawing and the second is the minimum
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// frequency (in seconds) we're willing to wake up
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const ANIMATION_OPACITY_STEP_INCREMENT = 4.0;
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const ANIMATION_MIN_WAKEUP_INTERVAL = 1.0;
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let _backgroundCache = null;
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const BackgroundCache = new Lang.Class({
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@ -181,6 +189,33 @@ const BackgroundCache = new Lang.Class({
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params.onFinished(content);
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}));
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}
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},
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getAnimation: function(params) {
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params = Params.parse(params, { filename: null,
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onLoaded: null });
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if (this._animationFilename == params.filename) {
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if (params.onLoaded) {
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GLib.idle_add(GLib.PRIORITY_DEFAULT, Lang.bind(this, function() {
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params.onLoaded(this._animation);
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}));
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}
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}
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let animation = new Animation({ filename: params.filename });
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animation.load(Lang.bind(this, function() {
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this._monitorFile(params.filename);
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this._animationFilename = params.filename;
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this._animation = animation;
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if (params.onLoaded) {
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GLib.idle_add(GLib.PRIORITY_DEFAULT, Lang.bind(this, function() {
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params.onLoaded(this._animation);
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}));
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}
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}));
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}
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});
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Signals.addSignalMethods(BackgroundCache.prototype);
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@ -196,6 +231,7 @@ const Background = new Lang.Class({
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_init: function(params) {
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params = Params.parse(params, { monitorIndex: 0,
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layoutManager: Main.layoutManager,
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effects: Meta.BackgroundEffects.NONE });
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this.actor = new Meta.BackgroundGroup();
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this.actor._delegate = this;
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@ -205,10 +241,13 @@ const Background = new Lang.Class({
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this._settings = new Gio.Settings({ schema: BACKGROUND_SCHEMA });
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this._monitorIndex = params.monitorIndex;
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this._layoutManager = params.layoutManager;
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this._effects = params.effects;
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this._fileWatches = {};
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this._pattern = null;
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this._image = null;
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// contains a single image for static backgrounds and
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// two images (from and to) for slide shows
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this._images = {};
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this._brightness = 1.0;
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this._vignetteSharpness = 0.2;
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@ -227,8 +266,12 @@ const Background = new Lang.Class({
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this._cancellable.cancel();
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this._cancellable = null;
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let i;
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if (this._animationUpdateTimeoutId) {
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GLib.source_remove (this._animationUpdateTimeoutId);
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this._animationUpdateTimeoutId = 0
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}
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let i;
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let keys = Object.keys(this._fileWatches);
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for (i = 0; i < keys.length; i++) {
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this._cache.disconnect(this._fileWatches[keys[i]]);
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@ -243,16 +286,20 @@ const Background = new Lang.Class({
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this._pattern = null;
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}
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if (this._image) {
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if (this._image.content)
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this._cache.removeImageContent(this._image.content);
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keys = Object.keys(this._images);
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for (i = 0; i < keys.length; i++) {
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let actor = this._images[keys[i]];
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this._image.destroy();
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this._image = null;
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if (actor.content)
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this._cache.removeImageContent(actor.content);
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actor.destroy();
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this._images[keys[i]] = null;
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}
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this.actor.disconnect(this._destroySignalId);
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this._destroySignalId = 0;
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this.actor.destroy();
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},
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@ -303,17 +350,125 @@ const Background = new Lang.Class({
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this._fileWatches[filename] = signalId;
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},
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_setImage: function(content, filename) {
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_addImage: function(content, index, filename) {
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content.saturation = this._saturation;
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content.brightness = this._brightness;
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content.vignette_sharpness = this._vignetteSharpness;
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this._image = new Meta.BackgroundActor();
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this._image.content = content;
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this.actor.add_child(this._image);
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let actor = new Meta.BackgroundActor();
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actor.content = content;
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this.actor.add_child(actor);
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this._images[index] = actor;
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this._watchCacheFile(filename);
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},
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_updateImage: function(content, index, filename) {
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content.saturation = this._saturation;
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content.brightness = this._brightness;
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content.vignette_sharpness = this._vignetteSharpness;
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this._images[index].content = content;
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this._watchCacheFile(filename);
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},
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_updateAnimationProgress: function() {
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if (this._images[1]) {
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this._images[1].raise_top();
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this._images[1].opacity = this._animation.transitionProgress * 255;
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}
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this._queueAnimationUpdate();
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},
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_updateAnimation: function() {
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this._animationUpdateTimeoutId = 0;
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let files = this._animation.getKeyFrameFiles(this._layoutManager.monitors[this._monitorIndex]);
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if (!files) {
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this._setLoaded();
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this._queueAnimationUpdate();
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return;
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}
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let numPendingImages = files.length;
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for (let i = 0; i < files.length; i++) {
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if (this._images[i] && this._images[i].content &&
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this._images[i].content.get_filename() == files[i]) {
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numPendingImages--;
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if (numPendingImages == 0)
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this._updateAnimationProgress();
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continue;
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}
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this._cache.getImageContent({ monitorIndex: this._monitorIndex,
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effects: this._effects,
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style: this._style,
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filename: files[i],
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cancellable: this._cancellable,
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onFinished: Lang.bind(this, function(content) {
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numPendingImages--;
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if (!content) {
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this._setLoaded();
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if (numPendingImages == 0)
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this._updateAnimationProgress();
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return;
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}
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if (!this._images[i]) {
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this._addImage(content, i, files[i]);
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} else {
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this._updateImage(content, i, files[i]);
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}
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if (numPendingImages == 0) {
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this._setLoaded();
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this._updateAnimationProgress();
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}
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})
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});
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}
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},
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_queueAnimationUpdate: function() {
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if (this._animationUpdateTimeoutId != 0)
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return;
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if (!this._cancellable || this._cancellable.is_cancelled())
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return;
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if (!this._animation.duration)
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return;
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let interval = Math.max(ANIMATION_MIN_WAKEUP_INTERVAL * 1000,
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ANIMATION_OPACITY_STEP_INCREMENT / this._animation.duration);
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this._animationUpdateTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT,
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interval,
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Lang.bind(this, function() {
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this._animationUpdateTimeoutId = 0;
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this._updateAnimation();
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return false;
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}));
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},
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_loadAnimation: function(filename) {
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this._cache.getAnimation({ filename: filename,
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onLoaded: Lang.bind(this, function(animation) {
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this._animation = animation;
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if (!this._animation) {
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this._setLoaded();
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return;
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}
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this._updateAnimation();
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this._watchCacheFile(filename);
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})
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});
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},
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_loadFile: function(filename) {
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this._cache.getImageContent({ monitorIndex: this._monitorIndex,
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effects: this._effects,
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@ -322,10 +477,13 @@ const Background = new Lang.Class({
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cancellable: this._cancellable,
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onFinished: Lang.bind(this, function(content) {
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if (!content) {
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if (this._cancellable &&
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!this._cancellable.is_cancelled())
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this._loadAnimation(filename);
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return;
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}
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this._setImage(content, filename);
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this._addImage(content, 0, filename);
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this._setLoaded();
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})
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});
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@ -364,8 +522,12 @@ const Background = new Lang.Class({
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if (this._pattern && this._pattern.content)
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this._pattern.content.saturation = saturation;
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if (this._image && this._image.content)
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this._image.content.saturation = saturation;
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let keys = Object.keys(this._images);
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for (let i = 0; i < keys.length; i++) {
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let image = this._images[keys[i]];
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if (image && image.content)
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image.content.saturation = saturation;
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}
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},
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get brightness() {
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@ -377,8 +539,12 @@ const Background = new Lang.Class({
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if (this._pattern && this._pattern.content)
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this._pattern.content.brightness = factor;
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if (this._image && this._image.content)
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this._image.content.brightness = factor;
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let keys = Object.keys(this._images);
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for (let i = 0; i < keys.length; i++) {
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let image = this._images[keys[i]];
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if (image && image.content)
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image.content.brightness = factor;
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}
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},
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get vignetteSharpness() {
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@ -390,8 +556,12 @@ const Background = new Lang.Class({
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if (this._pattern && this._pattern.content)
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this._pattern.content.vignette_sharpness = sharpness;
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if (this._image && this._image.content)
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this._image.content.vignette_sharpness = sharpness;
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let keys = Object.keys(this._images);
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for (let i = 0; i < keys.length; i++) {
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let image = this._images[keys[i]];
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if (image && image.content)
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image.content.vignette_sharpness = sharpness;
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}
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}
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});
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Signals.addSignalMethods(Background.prototype);
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@ -413,6 +583,58 @@ const StillFrame = new Lang.Class({
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});
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Signals.addSignalMethods(StillFrame.prototype);
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const Animation = new Lang.Class({
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Name: 'Animation',
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_init: function(params) {
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params = Params.parse(params, { filename: null });
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this.filename = params.filename;
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this._keyFrames = [];
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this.duration = 0.0;
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this.transitionProgress = 0.0;
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this.loaded = false;
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},
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load: function(callback) {
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let file = Gio.File.new_for_path(this.filename);
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this._show = new GnomeDesktop.BGSlideShow({ filename: this.filename });
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this._show.load_async(null,
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Lang.bind(this,
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function(object, result) {
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this.duration = this._show.get_total_duration();
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this.loaded = true;
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if (callback)
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callback();
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}));
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},
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getKeyFrameFiles: function(monitor) {
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if (!this._show)
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return null;
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if (this._show.get_num_slides() < 1)
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return null;
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let [progress, duration, isFixed, file1, file2] = this._show.get_current_slide(monitor.width, monitor.height);
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this.transitionProgress = progress;
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let files = [];
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if (file1)
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files.push(file1);
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if (file2)
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files.push(file2);
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return files;
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},
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});
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Signals.addSignalMethods(Animation.prototype);
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const BackgroundManager = new Lang.Class({
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Name: 'BackgroundManager',
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