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import { delimiter } from '../modules/core/regex.js'
import { extend } from '../utils/adopter.js'
import { subClassArray } from './ArrayPolyfill.js'
import SVGArray from './SVGArray.js'
const PointArray = subClassArray( 'PointArray', SVGArray )
export default PointArray
extend( PointArray, {
// Convert array to string
toString () {
// convert to a poly point string
for ( var i = 0, il = this.length, array = []; i < il; i++ ) {
array.push( this[i].join( ',' ) )
}
return array.join( ' ' )
},
// Convert array to line object
toLine () {
return {
x1: this[0][0],
y1: this[0][1],
x2: this[1][0],
y2: this[1][1]
}
},
// Get morphed array at given position
at ( pos ) {
// make sure a destination is defined
if ( !this.destination ) return this
// generate morphed point string
for ( var i = 0, il = this.length, array = []; i < il; i++ ) {
array.push( [
this[i][0] + ( this.destination[i][0] - this[i][0] ) * pos,
this[i][1] + ( this.destination[i][1] - this[i][1] ) * pos
] )
}
return new PointArray( array )
},
// Parse point string and flat array
parse ( array = [ [ 0, 0 ] ] ) {
var points = []
// if it is an array
if ( array instanceof Array ) {
// and it is not flat, there is no need to parse it
if ( array[0] instanceof Array ) {
return array
}
} else { // Else, it is considered as a string
// parse points
array = array.trim().split( delimiter ).map( parseFloat )
}
// validate points - https://svgwg.org/svg2-draft/shapes.html#DataTypePoints
// Odd number of coordinates is an error. In such cases, drop the last odd coordinate.
if ( array.length % 2 !== 0 ) array.pop()
// wrap points in two-tuples and parse points as floats
for ( var i = 0, len = array.length; i < len; i = i + 2 ) {
points.push( [ array[i], array[i + 1] ] )
}
return points
},
// Move point string
move ( x, y ) {
var box = this.bbox()
// get relative offset
x -= box.x
y -= box.y
// move every point
if ( !isNaN( x ) && !isNaN( y ) ) {
for ( var i = this.length - 1; i >= 0; i-- ) {
this[i] = [ this[i][0] + x, this[i][1] + y ]
}
}
return this
},
// Resize poly string
size ( width, height ) {
var i
var box = this.bbox()
// recalculate position of all points according to new size
for ( i = this.length - 1; i >= 0; i-- ) {
if ( box.width ) this[i][0] = ( ( this[i][0] - box.x ) * width ) / box.width + box.x
if ( box.height ) this[i][1] = ( ( this[i][1] - box.y ) * height ) / box.height + box.y
}
return this
},
// Get bounding box of points
bbox () {
var maxX = -Infinity
var maxY = -Infinity
var minX = Infinity
var minY = Infinity
this.forEach( function ( el ) {
maxX = Math.max( el[0], maxX )
maxY = Math.max( el[1], maxY )
minX = Math.min( el[0], minX )
minY = Math.min( el[1], minY )
} )
return { x: minX, y: minY, width: maxX - minX, height: maxY - minY }
}
} )
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