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// List font style attributes as they should be applied to style
var _styleAttr = ('size family weight stretch variant style').split(' ')
SVG.Text = SVG.invent({
// Initialize node
create: function() {
this.constructor.call(this, SVG.create('text'))
/* define default style */
this.styles = {
'font-size': 16
, 'font-family': 'Helvetica, Arial, sans-serif'
, 'text-anchor': 'start'
}
this._leading = new SVG.Number('1.2em')
this._rebuild = true
}
// Inherit from
, inherit: SVG.Shape
// Add class methods
, extend: {
// Move over x-axis
x: function(x, a) {
/* act as getter */
if (x == null)
return a ? this.attr('x') : this.bbox().x
/* set x taking anchor in mind */
if (!a) {
a = this.style('text-anchor')
x = a == 'start' ? x : a == 'end' ? x + this.bbox().width : x + this.bbox().width / 2
}
/* move lines as well if no textPath si present */
if (!this.textPath)
this.lines.each(function() { if (this.newLined) this.x(x) })
return this.attr('x', x)
}
// Move center over x-axis
, cx: function(x, a) {
return x == null ? this.bbox().cx : this.x(x - this.bbox().width / 2)
}
// Move center over y-axis
, cy: function(y, a) {
return y == null ? this.bbox().cy : this.y(a ? y : y - this.bbox().height / 2)
}
// Move element to given x and y values
, move: function(x, y, a) {
return this.x(x, a).y(y)
}
// Move element by its center
, center: function(x, y, a) {
return this.cx(x, a).cy(y, a)
}
// Set the text content
, text: function(text) {
/* act as getter */
if (text == null)
return this.content
/* remove existing lines */
this.clear()
if (typeof text === 'function') {
this._rebuild = false
text.call(this, this)
} else {
this._rebuild = true
/* make sure text is not blank */
text = SVG.regex.isBlank.test(text) ? 'text' : text
var i, il
, lines = text.split('\n')
/* build new lines */
for (i = 0, il = lines.length; i < il; i++)
this.tspan(lines[i]).newLine()
this.rebuild()
}
return this
}
// Create a tspan
, tspan: function(text) {
var node = this.textPath ? this.textPath.node : this.node
, tspan = new SVG.TSpan().text(text)
, style = this.style()
/* add new tspan */
node.appendChild(tspan.node)
this.lines.add(tspan)
/* add style if any */
if (!SVG.regex.isBlank.test(style))
tspan.style(style)
/* store content */
this.content += text
/* store text parent */
tspan.parent = this
return tspan
}
// Set font size
, size: function(size) {
return this.attr('font-size', size)
}
// Set / get leading
, leading: function(value) {
/* act as getter */
if (value == null)
return this._leading
/* act as setter */
value = new SVG.Number(value)
this._leading = value
/* apply leading */
this.lines.each(function() {
if (this.newLined)
this.attr('dy', value)
})
return this
}
// rebuild appearance type
, rebuild: function() {
var self = this
/* define position of all lines */
if (this._rebuild) {
this.lines.attr({
x: this.attr('x')
, dy: this._leading
, style: this.style()
})
}
return this
}
// Clear all lines
, clear: function() {
var node = this.textPath ? this.textPath.node : this.node
/* remove existing child nodes */
while (node.hasChildNodes())
node.removeChild(node.lastChild)
/* refresh lines */
delete this.lines
this.lines = new SVG.Set
/* initialize content */
this.content = ''
return this
}
}
// Add parent method
, construct: {
// Create text element
text: function(text) {
return this.put(new SVG.Text).text(text)
}
}
})
SVG.TSpan = SVG.invent({
// Initialize node
create: 'tspan'
// Inherit from
, inherit: SVG.Shape
// Add class methods
, extend: {
// Set text content
text: function(text) {
this.node.appendChild(document.createTextNode(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() {
this.newLined = true
this.parent.content += '\n'
this.dy(this.parent._leading)
return this.attr('x', this.parent.x())
}
}
})
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