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import Parent from './Parent.js'
import SVGNumber from './SVGNumber.js'
import {nodeOrNew, adopt} from './tools.js'
import {attrs} from './defaults.js'
export default class Text extends Parent {
// Initialize node
constructor (node) {
super(nodeOrNew('text', node))
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 default font
this.attr('font-family', attrs['font-family'])
}
// Move over x-axis
x (x) {
// act as getter
if (x == null) {
return this.attr('x')
}
return this.attr('x', x)
}
// Move over y-axis
y (y) {
var oy = this.attr('y')
var o = typeof oy === 'number' ? oy - this.bbox().y : 0
// act as getter
if (y == null) {
return typeof oy === 'number' ? oy - o : oy
}
return this.attr('y', typeof y === 'number' ? y + o : y)
}
// Move center over x-axis
cx (x) {
return x == null ? this.bbox().cx : this.x(x - this.bbox().width / 2)
}
// Move center over y-axis
cy (y) {
return y == null ? this.bbox().cy : this.y(y - this.bbox().height / 2)
}
// Set the text content
text (text) {
// act as getter
if (text === undefined) {
var children = this.node.childNodes
var firstLine = 0
text = ''
for (var i = 0, len = children.length; i < len; ++i) {
// skip textPaths - they are no lines
if (children[i].nodeName === 'textPath') {
if (i === 0) firstLine = 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 (var j = 0, jl = text.length; j < jl; j++) {
this.tspan(text[j]).newLine()
}
}
// disable build mode and rebuild lines
return this.build(false).rebuild()
}
// 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) {
var self = this
var blankLineOffset = 0
var dy = this.dom.leading * new SVGNumber(this.attr('font-size'))
this.each(function () {
if (this.dom.newLined) {
this.attr('x', self.attr('x'))
if (this.text() === '\n') {
blankLineOffset += dy
} else {
this.attr('dy', dy + blankLineOffset)
blankLineOffset = 0
}
}
})
this.fire('rebuild')
}
return this
}
// Enable / disable build mode
build (build) {
this._build = !!build
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
}
}
addFactory(Parent, {
// Create text element
text (text) {
return this.put(new Text()).text(text)
},
// Create plain text element
plain (text) {
return this.put(new Text()).plain(text)
}
})
class Tspan extends Parent {
// Initialize node
constructor (node) {
super(nodeOrNew('tspan', node))
}
// Set text content
text (text) {
if (text == null) return this.node.textContent + (this.dom.newLined ? '\n' : '')
typeof text === 'function' ? text.call(this, this) : this.plain(text)
return this
}
// Shortcut dx
dx (dx) {
return this.attr('dx', dx)
}
// Shortcut dy
dy (dy) {
return this.attr('dy', dy)
}
// Create new line
newLine () {
// fetch text parent
var t = this.parent(Text)
// mark new line
this.dom.newLined = true
// apply new position
return this.dy(t.dom.leading * t.attr('font-size')).attr('x', t.x())
}
}
extend([Text, Tspan], {
// Create plain text node
plain: function (text) {
// clear if build mode is disabled
if (this._build === false) {
this.clear()
}
// create text node
this.node.appendChild(document.createTextNode(text))
return this
},
// Create a tspan
tspan: function (text) {
var tspan = new Tspan()
// clear if build mode is disabled
if (!this._build) {
this.clear()
}
// add new tspan
this.node.appendChild(tspan.node)
return tspan.text(text)
},
// FIXME: Does this also work for textpath?
// Get length of text element
length: function () {
return this.node.getComputedTextLength()
}
})
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