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import Stop from './Stop.js'
import * as gradiented from './gradiented.js'
import {nodeOrNew, extend, addFactory} from './tools.js'
export default class Gradient extends Container {
constructor (type) {
super(nodeOrNew(type + 'Gradient', typeof type === 'string' ? null : type))
}
// 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)
}
}
extend(Gradient, gradiented)
addFactory(Parent, {
// Create gradient element in defs
gradient (type, block) {
return this.defs().gradient(type, block)
}
})
// Base gradient generation
addFactory(Defs, {
// define gradient
gradient: function (type, block) {
return this.put(new Gradient(type)).update(block)
}
})
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