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* Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
* http://paperjs.org/
*
* Copyright (c) 2011 - 2020, Jürg Lehni & Jonathan Puckey
* http://juerglehni.com/ & https://puckey.studio/
*
* Distributed under the MIT license. See LICENSE file for details.
*
* All rights reserved.
*/
// TODO: remove eslint-disable comment and deal with errors over time
/* eslint-disable */
import { ref } from '~/globals';
import { Base } from '~/straps';
import { UID } from '~/util/UID';
import { GradientStop } from './GradientStop';
/**
* @name Gradient
*
* @class The Gradient object.
*
* @classexample {@paperscript height=300}
* // Applying a linear gradient color containing evenly distributed
* // color stops:
*
* // Define two points which we will be using to construct
* // the path and to position the gradient color:
* var topLeft = view.center - [80, 80];
* var bottomRight = view.center + [80, 80];
*
* // Create a rectangle shaped path between
* // the topLeft and bottomRight points:
* var path = new Path.Rectangle({
* topLeft: topLeft,
* bottomRight: bottomRight,
* // Fill the path with a gradient of three color stops
* // that runs between the two points we defined earlier:
* fillColor: {
* gradient: {
* stops: ['yellow', 'red', 'blue']
* },
* origin: topLeft,
* destination: bottomRight
* }
* });
*
* @classexample {@paperscript height=300}
* // Create a circle shaped path at the center of the view,
* // using 40% of the height of the view as its radius
* // and fill it with a radial gradient color:
* var path = new Path.Circle({
* center: view.center,
* radius: view.bounds.height * 0.4
* });
*
* // Fill the path with a radial gradient color with three stops:
* // yellow from 0% to 5%, mix between red from 5% to 20%,
* // mix between red and black from 20% to 100%:
* path.fillColor = {
* gradient: {
* stops: [['yellow', 0.05], ['red', 0.2], ['black', 1]],
* radial: true
* },
* origin: path.position,
* destination: path.bounds.rightCenter
* };
*/
export const Gradient = Base.extend(
/** @lends Gradient# */ {
_class: 'Gradient',
// DOCS: Document #initialize()
initialize: function Gradient(stops, radial) {
// Use UID here since Gradients are exported through dictionary.add().
// @ts-expect-error = Expected 1 arguments, but got 0
this._id = UID.get();
if (stops && Base.isPlainObject(stops)) {
this.set(stops);
// Erase arguments since we used the passed object instead.
stops = radial = null;
}
// As these values might already have been set in the _set() call above,
// only initialize them if that hasn't happened yet.
if (this._stops == null) {
this.setStops(stops || ['white', 'black']);
}
if (this._radial == null) {
// Support old string type argument and new radial boolean.
this.setRadial((typeof radial === 'string' && radial === 'radial') || radial || false);
}
},
_serialize: function (options, dictionary) {
return dictionary.add(this, function () {
return Base.serialize([this._stops, this._radial], options, true, dictionary);
});
},
/**
* Called by various setters whenever a gradient value changes
*/
_changed: function () {
// Loop through the gradient-colors that use this gradient and notify
// them, so they can notify the items they belong to.
for (var i = 0, l = this._owners && this._owners.length; i < l; i++) {
this._owners[i]._changed();
}
},
/**
* Called by Color#setGradient()
* This is required to pass on _changed() notifications to the _owners.
*/
_addOwner: function (color) {
if (!this._owners) this._owners = [];
this._owners.push(color);
},
/**
* Called by Color whenever this gradient stops being used.
*/
_removeOwner: function (color) {
var index = this._owners ? this._owners.indexOf(color) : -1;
if (index != -1) {
this._owners.splice(index, 1);
if (!this._owners.length) this._owners = undefined;
}
},
/**
* @return {Gradient} a copy of the gradient
*/
clone: function () {
var stops = [];
for (var i = 0, l = this._stops.length; i < l; i++) {
stops[i] = this._stops[i].clone();
}
return new Gradient(stops, this._radial);
},
/**
* The gradient stops on the gradient ramp.
*
* @bean
* @type GradientStop[]
*/
getStops: function () {
return this._stops;
},
setStops: function (stops) {
if (stops.length < 2) {
throw new Error('Gradient stop list needs to contain at least two stops.');
}
// If this gradient already contains stops, first remove their owner.
var _stops = this._stops;
if (_stops) {
for (var i = 0, l = _stops.length; i < l; i++) _stops[i]._owner = undefined;
}
_stops = this._stops = GradientStop.readList(stops, 0, { clone: true });
// Now assign this gradient as the new gradients' owner.
for (var i = 0, l = _stops.length; i < l; i++) _stops[i]._owner = this;
this._changed();
},
/**
* Specifies whether the gradient is radial or linear.
*
* @bean
* @type Boolean
*/
getRadial: function () {
return this._radial;
},
setRadial: function (radial) {
this._radial = radial;
this._changed();
},
/**
* Checks whether the gradient is equal to the supplied gradient.
*
* @param {Gradient} gradient
* @return {Boolean} {@true if they are equal}
*/
equals: function (gradient) {
if (gradient === this) return true;
if (gradient && this._class === gradient._class) {
var stops1 = this._stops,
stops2 = gradient._stops,
length = stops1.length;
if (length === stops2.length) {
for (var i = 0; i < length; i++) {
if (!stops1[i].equals(stops2[i])) return false;
}
return true;
}
}
return false;
},
}
);
ref.Gradient = Gradient;
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