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import {
adopt,
extend,
nodeOrNew,
register,
wrapWithAttrCheck
} from '../utils/adopter.js'
import { registerMethods } from '../utils/methods.js'
import SVGNumber from '../types/SVGNumber.js'
import Shape from './Shape.js'
import { globals } from '../utils/window.js'
import * as textable from '../modules/core/textable.js'
import { isDescriptive } from '../utils/utils.js'
export default class Text extends Shape {
// Initialize node
constructor(node, attrs = node) {
super(nodeOrNew('text', node), attrs)
this.dom.leading = new SVGNumber(1.3) // store leading value for rebuilding
this._rebuild = true // enable automatic updating of dy values
this._build = false // disable build mode for adding multiple lines
}
// Set / get leading
leading(value) {
// act as getter
if (value == null) {
return this.dom.leading
}
// act as setter
this.dom.leading = new SVGNumber(value)
return this.rebuild()
}
// Rebuild appearance type
rebuild(rebuild) {
// store new rebuild flag if given
if (typeof rebuild === 'boolean') {
this._rebuild = rebuild
}
// define position of all lines
if (this._rebuild) {
const self = this
let blankLineOffset = 0
const leading = this.dom.leading
this.each(function (i) {
if (isDescriptive(this.node)) return
const fontSize = globals.window
.getComputedStyle(this.node)
.getPropertyValue('font-size')
const dy = leading * new SVGNumber(fontSize)
if (this.dom.newLined) {
this.attr('x', self.attr('x'))
if (this.text() === '\n') {
blankLineOffset += dy
} else {
this.attr('dy', i ? dy + blankLineOffset : 0)
blankLineOffset = 0
}
}
})
this.fire('rebuild')
}
return this
}
// overwrite method from parent to set data properly
setData(o) {
this.dom = o
this.dom.leading = new SVGNumber(o.leading || 1.3)
return this
}
// Set the text content
text(text) {
// act as getter
if (text === undefined) {
const children = this.node.childNodes
let firstLine = 0
text = ''
for (let i = 0, len = children.length; i < len; ++i) {
// skip textPaths - they are no lines
if (children[i].nodeName === 'textPath' || isDescriptive(children[i])) {
if (i === 0) firstLine = i + 1
continue
}
// add newline if its not the first child and newLined is set to true
if (
i !== firstLine &&
children[i].nodeType !== 3 &&
adopt(children[i]).dom.newLined === true
) {
text += '\n'
}
// add content of this node
text += children[i].textContent
}
return text
}
// remove existing content
this.clear().build(true)
if (typeof text === 'function') {
// call block
text.call(this, this)
} else {
// store text and make sure text is not blank
text = (text + '').split('\n')
// build new lines
for (let j = 0, jl = text.length; j < jl; j++) {
this.newLine(text[j])
}
}
// disable build mode and rebuild lines
return this.build(false).rebuild()
}
}
extend(Text, textable)
registerMethods({
Container: {
// Create text element
text: wrapWithAttrCheck(function (text = '') {
return this.put(new Text()).text(text)
}),
// Create plain text element
plain: wrapWithAttrCheck(function (text = '') {
return this.put(new Text()).plain(text)
})
}
})
register(Text, 'Text')
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