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import {
extend,
nodeOrNew,
register,
wrapWithAttrCheck
} from '../utils/adopter.js'
import { registerMethods } from '../utils/methods.js'
import Box from '../types/Box.js'
import Container from './Container.js'
import Stop from './Stop.js'
import baseFind from '../modules/core/selector.js'
import * as gradiented from '../modules/core/gradiented.js'
export default class Gradient extends Container {
constructor ( type, attrs ) {
super(
nodeOrNew( type + 'Gradient', typeof type === 'string' ? null : type ),
attrs
)
}
// Add a color stop
stop ( offset, color, opacity ) {
return this.put( new Stop() ).update( offset, color, opacity )
}
// Update gradient
update ( block ) {
// remove all stops
this.clear()
// invoke passed block
if ( typeof block === 'function' ) {
block.call( this, this )
}
return this
}
// Return the fill id
url () {
return 'url(#' + this.id() + ')'
}
// Alias string convertion to fill
toString () {
return this.url()
}
// custom attr to handle transform
attr ( a, b, c ) {
if ( a === 'transform' ) a = 'gradientTransform'
return super.attr( a, b, c )
}
targets () {
return baseFind( 'svg [fill*="' + this.id() + '"]' )
}
bbox () {
return new Box()
}
}
extend( Gradient, gradiented )
registerMethods( {
Container: {
// Create gradient element in defs
gradient: wrapWithAttrCheck( function ( type, block ) {
return this.defs().gradient( type, block )
} )
},
// define gradient
Defs: {
gradient: wrapWithAttrCheck( function ( type, block ) {
return this.put( new Gradient( type ) ).update( block )
} )
}
} )
register( Gradient )
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