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import {
extend,
nodeOrNew,
register,
wrapWithAttrCheck
} from '../utils/adopter.js'
import { globals } from '../utils/window.js'
import { registerMethods } from '../utils/methods.js'
import SVGNumber from '../types/SVGNumber.js'
import Shape from './Shape.js'
import Text from './Text.js'
import * as textable from '../modules/core/textable.js'
export default class Tspan extends Shape {
// Initialize node
constructor (node, attrs = node) {
super(nodeOrNew('tspan', node), attrs)
this._build = false // disable build mode for adding multiple lines
}
// Shortcut dx
dx (dx) {
return this.attr('dx', dx)
}
// Shortcut dy
dy (dy) {
return this.attr('dy', dy)
}
// Create new line
newLine () {
// mark new line
this.dom.newLined = true
// fetch parent
const text = this.parent()
// early return in case we are not in a text element
if (!(text instanceof Text)) {
return this
}
const i = text.index(this)
const fontSize = globals.window.getComputedStyle(this.node)
.getPropertyValue('font-size')
const dy = text.dom.leading * new SVGNumber(fontSize)
// apply new position
return this.dy(i ? dy : 0).attr('x', text.x())
}
// Set text content
text (text) {
if (text == null) return this.node.textContent + (this.dom.newLined ? '\n' : '')
if (typeof text === 'function') {
this.clear().build(true)
text.call(this, this)
this.build(false)
} else {
this.plain(text)
}
return this
}
}
extend(Tspan, textable)
registerMethods({
Tspan: {
tspan: wrapWithAttrCheck(function (text = '') {
const tspan = new Tspan()
// clear if build mode is disabled
if (!this._build) {
this.clear()
}
// add new tspan
return this.put(tspan).text(text)
})
},
Text: {
newLine: function (text = '') {
return this.tspan(text).newLine()
}
}
})
register(Tspan, 'Tspan')
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