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// Path points array
SVG.PathArray = function(array, fallback) {
SVG.Array.call(this, array, fallback || [['M', 0, 0]])
}
// Inherit from SVG.Array
SVG.PathArray.prototype = new SVG.Array
SVG.PathArray.prototype.constructor = SVG.PathArray
SVG.extend(SVG.PathArray, {
// Convert array to string
toString: function() {
return arrayToString(this.value)
}
// Move path string
, move: function(x, y) {
// get bounding box of current situation
var box = this.bbox()
// get relative offset
x -= box.x
y -= box.y
if (!isNaN(x) && !isNaN(y)) {
// move every point
for (var l, i = this.value.length - 1; i >= 0; i--) {
l = this.value[i][0]
if (l == 'M' || l == 'L' || l == 'T') {
this.value[i][1] += x
this.value[i][2] += y
} else if (l == 'H') {
this.value[i][1] += x
} else if (l == 'V') {
this.value[i][1] += y
} else if (l == 'C' || l == 'S' || l == 'Q') {
this.value[i][1] += x
this.value[i][2] += y
this.value[i][3] += x
this.value[i][4] += y
if (l == 'C') {
this.value[i][5] += x
this.value[i][6] += y
}
} else if (l == 'A') {
this.value[i][6] += x
this.value[i][7] += y
}
}
}
return this
}
// Resize path string
, size: function(width, height) {
// get bounding box of current situation
var i, l, box = this.bbox()
// recalculate position of all points according to new size
for (i = this.value.length - 1; i >= 0; i--) {
l = this.value[i][0]
if (l == 'M' || l == 'L' || l == 'T') {
this.value[i][1] = ((this.value[i][1] - box.x) * width) / box.width + box.x
this.value[i][2] = ((this.value[i][2] - box.y) * height) / box.height + box.y
} else if (l == 'H') {
this.value[i][1] = ((this.value[i][1] - box.x) * width) / box.width + box.x
} else if (l == 'V') {
this.value[i][1] = ((this.value[i][1] - box.y) * height) / box.height + box.y
} else if (l == 'C' || l == 'S' || l == 'Q') {
this.value[i][1] = ((this.value[i][1] - box.x) * width) / box.width + box.x
this.value[i][2] = ((this.value[i][2] - box.y) * height) / box.height + box.y
this.value[i][3] = ((this.value[i][3] - box.x) * width) / box.width + box.x
this.value[i][4] = ((this.value[i][4] - box.y) * height) / box.height + box.y
if (l == 'C') {
this.value[i][5] = ((this.value[i][5] - box.x) * width) / box.width + box.x
this.value[i][6] = ((this.value[i][6] - box.y) * height) / box.height + box.y
}
} else if (l == 'A') {
// resize radii
this.value[i][1] = (this.value[i][1] * width) / box.width
this.value[i][2] = (this.value[i][2] * height) / box.height
// move position values
this.value[i][6] = ((this.value[i][6] - box.x) * width) / box.width + box.x
this.value[i][7] = ((this.value[i][7] - box.y) * height) / box.height + box.y
}
}
return this
}
// Test if the passed path array use the same path data commands as this path array
, equalCommands: function(pathArray) {
var i, il, equalCommands
pathArray = new SVG.PathArray(pathArray)
equalCommands = this.value.length === pathArray.value.length
for(i = 0, il = this.value.length; equalCommands && i < il; i++) {
equalCommands = this.value[i][0] === pathArray.value[i][0]
}
return equalCommands
}
// Make path array morphable
, morph: function(pathArray) {
pathArray = new SVG.PathArray(pathArray)
if(this.equalCommands(pathArray)) {
this.destination = pathArray
} else {
this.destination = null
}
return this
}
// Get morphed path array at given position
, at: function(pos) {
// make sure a destination is defined
if (!this.destination) return this
var sourceArray = this.value
, destinationArray = this.destination.value
, array = [], pathArray = new SVG.PathArray()
, i, il, j, jl
// Animate has specified in the SVG spec
// See: https://www.w3.org/TR/SVG11/paths.html#PathElement
for (i = 0, il = sourceArray.length; i < il; i++) {
array[i] = [sourceArray[i][0]]
for(j = 1, jl = sourceArray[i].length; j < jl; j++) {
array[i][j] = sourceArray[i][j] + (destinationArray[i][j] - sourceArray[i][j]) * pos
}
// For the two flags of the elliptical arc command, the SVG spec say:
// Flags and booleans are interpolated as fractions between zero and one, with any non-zero value considered to be a value of one/true
// Elliptical arc command as an array followed by corresponding indexes:
// ['A', rx, ry, x-axis-rotation, large-arc-flag, sweep-flag, x, y]
// 0 1 2 3 4 5 6 7
if(array[i][0] === 'A') {
array[i][4] = +(array[i][4] != 0)
array[i][5] = +(array[i][5] != 0)
}
}
// Directly modify the value of a path array, this is done this way for performance
pathArray.value = array
return pathArray
}
// Absolutize and parse path to array
, parse: function(array) {
// if it's already a patharray, no need to parse it
if (array instanceof SVG.PathArray) return array.valueOf()
// prepare for parsing
var i, x0, y0, s, seg, arr
, x = 0
, y = 0
, paramCnt = { 'M':2, 'L':2, 'H':1, 'V':1, 'C':6, 'S':4, 'Q':4, 'T':2, 'A':7 }
if(typeof array == 'string'){
array = array
.replace(SVG.regex.numbersWithDots, pathRegReplace) // convert 45.123.123 to 45.123 .123
.replace(SVG.regex.pathLetters, ' $& ') // put some room between letters and numbers
.replace(SVG.regex.hyphen, '$1 -') // add space before hyphen
.trim() // trim
.split(SVG.regex.delimiter) // split into array
}else{
array = array.reduce(function(prev, curr){
return [].concat.apply(prev, curr)
}, [])
}
// array now is an array containing all parts of a path e.g. ['M', '0', '0', 'L', '30', '30' ...]
var arr = []
do{
// Test if we have a path letter
if(SVG.regex.isPathLetter.test(array[0])){
s = array[0]
array.shift()
// If last letter was a move command and we got no new, it defaults to [L]ine
}else if(s == 'M'){
s = 'L'
}else if(s == 'm'){
s = 'l'
}
// add path letter as first element
seg = [s.toUpperCase()]
// push all necessary parameters to segment
for(i = 0; i < paramCnt[seg[0]]; ++i){
seg.push(parseFloat(array.shift()))
}
// upper case
if(s == seg[0]){
if(s == 'M' || s == 'L' || s == 'C' || s == 'Q' || s == 'S' || s == 'T'){
x = seg[paramCnt[seg[0]]-1]
y = seg[paramCnt[seg[0]]]
}else if(s == 'V'){
y = seg[1]
}else if(s == 'H'){
x = seg[1]
}else if(s == 'A'){
x = seg[6]
y = seg[7]
}
// lower case
}else{
// convert relative to absolute values
if(s == 'm' || s == 'l' || s == 'c' || s == 's' || s == 'q' || s == 't'){
seg[1] += x
seg[2] += y
if(seg[3] != null){
seg[3] += x
seg[4] += y
}
if(seg[5] != null){
seg[5] += x
seg[6] += y
}
// move pointer
x = seg[paramCnt[seg[0]]-1]
y = seg[paramCnt[seg[0]]]
}else if(s == 'v'){
seg[1] += y
y = seg[1]
}else if(s == 'h'){
seg[1] += x
x = seg[1]
}else if(s == 'a'){
seg[6] += x
seg[7] += y
x = seg[6]
y = seg[7]
}
}
if(seg[0] == 'M'){
x0 = x
y0 = y
}
if(seg[0] == 'Z'){
x = x0
y = y0
}
arr.push(seg)
}while(array.length)
return arr
}
// Get bounding box of path
, bbox: function() {
SVG.parser.path.setAttribute('d', this.toString())
return SVG.parser.path.getBBox()
}
})
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