From 1144404e4bea677c293e9bad273ce273aa1cd885 Mon Sep 17 00:00:00 2001
From: Ulrich-Matthias Schäfer <ulima.ums@googlemail.com>
Date: Mon, 20 Feb 2017 15:29:14 +0100
Subject: Added clone method to SVG.Array/PointArray/PathArray (#590)

---
 src/array.js      | 24 ++++++++++++++----------
 src/helpers.js    | 12 ++++++++++++
 src/patharray.js  |  3 ++-
 src/pointarray.js |  4 ++--
 4 files changed, 30 insertions(+), 13 deletions(-)

(limited to 'src')

diff --git a/src/array.js b/src/array.js
index 8f47774..4589835 100644
--- a/src/array.js
+++ b/src/array.js
@@ -2,11 +2,11 @@
 SVG.Array = function(array, fallback) {
   array = (array || []).valueOf()
 
-  // if array is empty and fallback is provided, use fallback 
+  // if array is empty and fallback is provided, use fallback
   if (array.length == 0 && fallback)
     array = fallback.valueOf()
 
-  // parse array 
+  // parse array
   this.value = this.parse(array)
 }
 
@@ -15,7 +15,7 @@ SVG.extend(SVG.Array, {
   morph: function(array) {
     this.destination = this.parse(array)
 
-    // normalize length of arrays 
+    // normalize length of arrays
     if (this.value.length != this.destination.length) {
       var lastValue       = this.value[this.value.length - 1]
         , lastDestination = this.destination[this.destination.length - 1]
@@ -25,25 +25,25 @@ SVG.extend(SVG.Array, {
       while(this.value.length < this.destination.length)
         this.value.push(lastValue)
     }
-    
+
     return this
   }
   // Clean up any duplicate points
 , settle: function() {
-    // find all unique values 
+    // 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 
+    // set new value
     return this.value = seen
   }
   // Get morphed array at given position
 , at: function(pos) {
-    // make sure a destination is defined 
+    // make sure a destination is defined
     if (!this.destination) return this
 
-    // generate morphed array 
+    // 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)
 
@@ -61,7 +61,7 @@ SVG.extend(SVG.Array, {
 , parse: function(array) {
     array = array.valueOf()
 
-    // if already is an array, no need to parse it 
+    // if already is an array, no need to parse it
     if (Array.isArray(array)) return array
 
     return this.split(array)
@@ -76,5 +76,9 @@ SVG.extend(SVG.Array, {
 
     return this
   }
-
+, clone: function() {
+    var clone = new this.constructor()
+    clone.value = array_clone(this.value)
+    return clone
+  }
 })
\ No newline at end of file
diff --git a/src/helpers.js b/src/helpers.js
index aa23bbe..2a52a1b 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -1,3 +1,15 @@
+// creates deep clone of array
+function array_clone(arr){
+  var clone = arr.slice(0)
+  for(var i = clone.length; i--;){
+    if(Array.isArray(clone[i])){
+      clone[i] = array_clone(clone[i])
+    }
+  }
+  return clone
+}
+
+// tests if a given element is instance of an object
 function is(el, obj){
   return el instanceof obj
 }
diff --git a/src/patharray.js b/src/patharray.js
index 479c66f..366729e 100644
--- a/src/patharray.js
+++ b/src/patharray.js
@@ -1,10 +1,11 @@
 // Path points array
 SVG.PathArray = function(array, fallback) {
-  this.constructor.call(this, array, fallback || [['M', 0, 0]])
+  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
diff --git a/src/pointarray.js b/src/pointarray.js
index 0a4401a..fa87c4b 100644
--- a/src/pointarray.js
+++ b/src/pointarray.js
@@ -1,10 +1,11 @@
 // Poly points array
 SVG.PointArray = function(array, fallback) {
-  this.constructor.call(this, array, fallback || [[0,0]])
+  SVG.Array.call(this, array, fallback || [[0,0]])
 }
 
 // Inherit from SVG.Array
 SVG.PointArray.prototype = new SVG.Array
+SVG.PointArray.prototype.constructor = SVG.PointArray
 
 SVG.extend(SVG.PointArray, {
   // Convert array to string
@@ -98,5 +99,4 @@ SVG.extend(SVG.PointArray, {
 
     return SVG.parser.poly.getBBox()
   }
-
 })
-- 
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