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/* global arrayClone */
// Module for array conversion
SVG.Array = function (array, fallback) {
array = (array || []).valueOf()
// if array is empty and fallback is provided, use fallback
if (array.length === 0 && fallback) {
array = fallback.valueOf()
}
// parse array
this.value = this.parse(array)
}
SVG.extend(SVG.Array, {
// Make array morphable
morph: function (array) {
this.destination = this.parse(array)
// normalize length of arrays
if (this.value.length !== this.destination.length) {
var lastValue = this.value[this.value.length - 1]
var lastDestination = this.destination[this.destination.length - 1]
while (this.value.length > this.destination.length) {
this.destination.push(lastDestination)
}
while (this.value.length < this.destination.length) {
this.value.push(lastValue)
}
}
return this
},
// Clean up any duplicate points
settle: function () {
// find all unique values
for (var i = 0, il = this.value.length, seen = []; i < il; i++) {
if (seen.indexOf(this.value[i]) === -1) {
seen.push(this.value[i])
}
}
// set new value
this.value = seen
return seen
},
// Get morphed array at given position
at: function (pos) {
// make sure a destination is defined
if (!this.destination) throw new Error('No destination set')
// generate morphed array
for (var i = 0, il = this.value.length, array = []; i < il; i++) {
array.push(this.value[i] + (this.destination[i] - this.value[i]) * pos)
}
return new SVG.Array(array)
},
// Convert array to string
toString: function () {
return this.value.join(' ')
},
// Real value
valueOf: function () {
return this.value
},
// Parse whitespace separated string
parse: function (array) {
array = array.valueOf()
// if already is an array, no need to parse it
if (Array.isArray(array)) return array
return array.trim().split(SVG.regex.delimiter).map(parseFloat)
},
// Reverse array
reverse: function () {
this.value.reverse()
return this
},
clone: function () {
var clone = new this.constructor()
clone.value = arrayClone(this.value)
return clone
}
})
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