gnome-shell/js/ui/lightbox.js
Florian Müllner a42f7c2384 cleanup: Use type-safe comparisons
We have been using type-safe comparisons in new code for quite a while
now, however old code has only been adapted slowly.

Change all the remaining bits to get rid of another legacy style
difference.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2866>
2023-08-09 15:10:38 +00:00

295 lines
9.9 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
import Clutter from 'gi://Clutter';
import GObject from 'gi://GObject';
import Shell from 'gi://Shell';
import St from 'gi://St';
import * as Params from '../misc/params.js';
export const DEFAULT_FADE_FACTOR = 0.4;
export const VIGNETTE_BRIGHTNESS = 0.5;
export const VIGNETTE_SHARPNESS = 0.7;
const VIGNETTE_DECLARATIONS = ' \
uniform float brightness; \n\
uniform float vignette_sharpness; \n\
float rand(vec2 p) { \n\
return fract(sin(dot(p, vec2(12.9898, 78.233))) * 43758.5453123); \n\
} \n';
const VIGNETTE_CODE = ' \
cogl_color_out.a = cogl_color_in.a; \n\
cogl_color_out.rgb = vec3(0.0, 0.0, 0.0); \n\
vec2 position = cogl_tex_coord_in[0].xy - 0.5; \n\
float t = clamp(length(1.41421 * position), 0.0, 1.0); \n\
float pixel_brightness = mix(1.0, 1.0 - vignette_sharpness, t); \n\
cogl_color_out.a *= 1.0 - pixel_brightness * brightness; \n\
cogl_color_out.a += (rand(position) - 0.5) / 100.0; \n';
const RadialShaderEffect = GObject.registerClass({
Properties: {
'brightness': GObject.ParamSpec.float(
'brightness', 'brightness', 'brightness',
GObject.ParamFlags.READWRITE,
0, 1, 1),
'sharpness': GObject.ParamSpec.float(
'sharpness', 'sharpness', 'sharpness',
GObject.ParamFlags.READWRITE,
0, 1, 0),
},
}, class RadialShaderEffect extends Shell.GLSLEffect {
_init(params) {
this._brightness = undefined;
this._sharpness = undefined;
super._init(params);
this._brightnessLocation = this.get_uniform_location('brightness');
this._sharpnessLocation = this.get_uniform_location('vignette_sharpness');
this.brightness = 1.0;
this.sharpness = 0.0;
}
vfunc_build_pipeline() {
this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT,
VIGNETTE_DECLARATIONS, VIGNETTE_CODE, true);
}
get brightness() {
return this._brightness;
}
set brightness(v) {
if (this._brightness === v)
return;
this._brightness = v;
this.set_uniform_float(this._brightnessLocation,
1, [this._brightness]);
this.notify('brightness');
}
get sharpness() {
return this._sharpness;
}
set sharpness(v) {
if (this._sharpness === v)
return;
this._sharpness = v;
this.set_uniform_float(this._sharpnessLocation,
1, [this._sharpness]);
this.notify('sharpness');
}
});
/**
* Lightbox:
*/
export const Lightbox = GObject.registerClass({
Properties: {
'active': GObject.ParamSpec.boolean(
'active', 'active', 'active', GObject.ParamFlags.READABLE, false),
},
}, class Lightbox extends St.Bin {
/**
* Lightbox creates a dark translucent "shade" actor to hide the
* contents of `container`, and allows you to specify particular actors
* in `container` to highlight by bringing them above the shade. It
* tracks added and removed actors in `container` while the lightboxing
* is active, and ensures that all actors are returned to their
* original stacking order when the lightboxing is removed. (However,
* if actors are restacked by outside code while the lightboxing is
* active, the lightbox may later revert them back to their original
* order.)
*
* By default, the shade window will have the height and width of
* `container` and will track any changes in its size. You can override
* this by passing an explicit width and height in `params`.
*
* @param {Clutter.Container} container parent Clutter.Container
* @param {object} [params] additional parameters:
* @param {boolean=} params.inhibitEvents: whether to inhibit events for `container`
* @param {number=} params.width: shade actor width
* @param {number=} params.height: shade actor height
* @param {number=} params.fadeFactor: fading opacity factor
* @param {boolean=} params.radialEffect: whether to enable the GLSL radial effect
*/
_init(container, params) {
params = Params.parse(params, {
inhibitEvents: false,
width: null,
height: null,
fadeFactor: DEFAULT_FADE_FACTOR,
radialEffect: false,
});
super._init({
reactive: params.inhibitEvents,
width: params.width,
height: params.height,
visible: false,
});
this._active = false;
this._container = container;
this._children = container.get_children();
this._fadeFactor = params.fadeFactor;
this._radialEffect = params.radialEffect;
if (this._radialEffect)
this.add_effect(new RadialShaderEffect({name: 'radial'}));
else
this.set({opacity: 0, style_class: 'lightbox'});
container.add_actor(this);
container.set_child_above_sibling(this, null);
this.connect('destroy', this._onDestroy.bind(this));
if (!params.width || !params.height) {
this.add_constraint(new Clutter.BindConstraint({
source: container,
coordinate: Clutter.BindCoordinate.ALL,
}));
}
container.connectObject(
'actor-added', this._actorAdded.bind(this),
'actor-removed', this._actorRemoved.bind(this), this);
this._highlighted = null;
}
get active() {
return this._active;
}
_actorAdded(container, newChild) {
let children = this._container.get_children();
let myIndex = children.indexOf(this);
let newChildIndex = children.indexOf(newChild);
if (newChildIndex > myIndex) {
// The child was added above the shade (presumably it was
// made the new top-most child). Move it below the shade,
// and add it to this._children as the new topmost actor.
this._container.set_child_above_sibling(this, newChild);
this._children.push(newChild);
} else if (newChildIndex === 0) {
// Bottom of stack
this._children.unshift(newChild);
} else {
// Somewhere else; insert it into the correct spot
let prevChild = this._children.indexOf(children[newChildIndex - 1]);
if (prevChild !== -1) // paranoia
this._children.splice(prevChild + 1, 0, newChild);
}
}
lightOn(fadeInTime) {
this.remove_all_transitions();
let easeProps = {
duration: fadeInTime || 0,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
};
let onComplete = () => {
this._active = true;
this.notify('active');
};
this.show();
if (this._radialEffect) {
this.ease_property(
'@effects.radial.brightness', VIGNETTE_BRIGHTNESS, easeProps);
this.ease_property(
'@effects.radial.sharpness', VIGNETTE_SHARPNESS,
Object.assign({onComplete}, easeProps));
} else {
this.ease(Object.assign(easeProps, {
opacity: 255 * this._fadeFactor,
onComplete,
}));
}
}
lightOff(fadeOutTime) {
this.remove_all_transitions();
this._active = false;
this.notify('active');
let easeProps = {
duration: fadeOutTime || 0,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
};
let onComplete = () => this.hide();
if (this._radialEffect) {
this.ease_property(
'@effects.radial.brightness', 1.0, easeProps);
this.ease_property(
'@effects.radial.sharpness', 0.0, Object.assign({onComplete}, easeProps));
} else {
this.ease(Object.assign(easeProps, {opacity: 0, onComplete}));
}
}
_actorRemoved(container, child) {
let index = this._children.indexOf(child);
if (index !== -1) // paranoia
this._children.splice(index, 1);
if (child === this._highlighted)
this._highlighted = null;
}
/**
* highlight:
*
* Highlights the indicated actor and unhighlights any other
* currently-highlighted actor. With no arguments or a false/null
* argument, all actors will be unhighlighted.
*
* @param {Clutter.Actor=} window actor to highlight
*/
highlight(window) {
if (this._highlighted === window)
return;
// Walk this._children raising and lowering actors as needed.
// Things get a little tricky if the to-be-raised and
// to-be-lowered actors were originally adjacent, in which
// case we may need to indicate some *other* actor as the new
// sibling of the to-be-lowered one.
let below = this;
for (let i = this._children.length - 1; i >= 0; i--) {
if (this._children[i] === window)
this._container.set_child_above_sibling(this._children[i], null);
else if (this._children[i] === this._highlighted)
this._container.set_child_below_sibling(this._children[i], below);
else
below = this._children[i];
}
this._highlighted = window;
}
/**
* _onDestroy:
*
* This is called when the lightbox' actor is destroyed, either
* by destroying its container or by explicitly calling this.destroy().
*/
_onDestroy() {
this.highlight(null);
}
});