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SVG.Text = SVG.invent({
// Initialize node
create: function() {
this.constructor.call(this, SVG.create('text'))
this._leading = new SVG.Number(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', SVG.defaults.attrs['font-family'])
}
// Inherit from
, inherit: SVG.Shape
// Add class methods
, extend: {
// Move over x-axis
x: function(x) {
// act as getter
if (x == null)
return this.attr('x')
// move lines as well if no textPath is present
if (!this.textPath)
this.lines().each(function() { if (this.newLined) this.x(x) })
return this.attr('x', x)
}
// Move over y-axis
, y: function(y) {
var oy = this.attr('y')
, 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: function(x) {
return x == null ? this.bbox().cx : this.x(x - this.bbox().width / 2)
}
// Move center over y-axis
, cy: function(y) {
return y == null ? this.bbox().cy : this.y(y - this.bbox().height / 2)
}
// Set the text content
, text: function(text) {
// act as getter
if (typeof text === 'undefined') return this.content
// 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 = (this.content = text).split('\n')
// build new lines
for (var i = 0, il = text.length; i < il; i++)
this.tspan(text[i]).newLine()
}
// disable build mode and rebuild lines
return this.build(false).rebuild()
}
// Set font size
, size: function(size) {
return this.attr('font-size', size).rebuild()
}
// Set / get leading
, leading: function(value) {
// act as getter
if (value == null)
return this._leading
// act as setter
this._leading = new SVG.Number(value)
return this.rebuild()
}
// Get all the first level lines
, lines: function() {
// filter tspans and map them to SVG.js instances
for (var i = 0, il = this.node.childNodes.length, lines = []; i < il; i++)
if (this.node.childNodes[i] instanceof SVGElement)
lines.push(SVG.adopt(this.node.childNodes[i]))
// return an instance of SVG.set
return new SVG.Set(lines)
}
// Rebuild appearance type
, rebuild: function(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
this.lines().each(function() {
if (this.newLined) {
if (!this.textPath)
this.attr('x', self.attr('x'))
this.attr('dy', self._leading * new SVG.Number(self.attr('font-size')))
}
})
this.fire('rebuild')
}
return this
}
// Enable / disable build mode
, build: function(build) {
this._build = !!build
return this
}
}
// Add parent method
, construct: {
// Create text element
text: function(text) {
return this.put(new SVG.Text).text(text)
}
// Create plain text element
, plain: function(text) {
return this.put(new SVG.Text).plain(text)
}
}
})
SVG.Tspan = SVG.invent({
// Initialize node
create: 'tspan'
// Inherit from
, inherit: SVG.Shape
// Add class methods
, extend: {
// Set text content
text: function(text) {
typeof text === 'function' ? text.call(this, this) : this.plain(text)
return this
}
// Shortcut dx
, dx: function(dx) {
return this.attr('dx', dx)
}
// Shortcut dy
, dy: function(dy) {
return this.attr('dy', dy)
}
// Create new line
, newLine: function() {
// fetch text parent
var t = this.doc(SVG.Text)
// mark new line
this.newLined = true
// apply new hy¡n
return this.dy(t._leading * t.attr('font-size')).attr('x', t.x())
}
}
})
SVG.extend(SVG.Text, SVG.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((this.content = text)))
return this
}
// Create a tspan
, tspan: function(text) {
var node = (this.textPath() || this).node
, tspan = new SVG.Tspan
// clear if build mode is disabled
if (this._build === false)
this.clear()
// add new tspan
node.appendChild(tspan.node)
// only first level tspans are considered to be "lines"
// that doenst make sence. A line is added to a SVG.Set which is never used or returned.
// So why bother adding it?
// Also: lines() reads all children so it already has this tspan in it because we added it before
if (this instanceof SVG.Text)
this.lines().add(tspan)
return tspan.text(text)
}
// Clear all lines
, clear: function() {
var node = (this.textPath() || this).node
// remove existing child nodes
while (node.hasChildNodes())
node.removeChild(node.lastChild)
// reset content references
if (this instanceof SVG.Text)
this.content = ''
return this
}
// Get length of text element
, length: function() {
return this.node.getComputedTextLength()
}
})
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