Sort out leftovers from the old fx module

This commit is mostly to clean up the implementation of the initAnimation
method of the Fx Module (issue #547). It also fixes these issues: #552, #582
and #584.

Here is a list of the changes and fixes that are made:
* Add a plot and array method to SVG.TextPath (issue #582)

* Make the method plot a getter when no parameter is passed for SVG.Polyline,
SVG.Polygon, SVG.Line, SVG.Path (this idea come from issue #547)

* Allow SVG.PointArray to be passed flat array

* Change the regexp SVG.PointArray use to parse string to allow more
flexibility in the way spaces and commas can be used to separate points
(something like this is now accepted: '1, 2, 3, 4')

* Allow plot to be called with 4 parameters when animating an SVG.Line

* Fix a bug in the plain morphing part of SVG.MorphObj that is in the FX module

* Relative value for SVG.Number are now calculated in its morph method (idea
from issue #547)

* Clean up the implementation of the initAnimation method of the FX module
(issues #547, #552, #584)

1 files changed, 12 insertions, 7 deletions

diff --git a/src/pointarray.js b/src/pointarray.js
index c1e4c86..0a4401a 100644
--- a/src/pointarray.js
+++ b/src/pointarray.js
@@ -38,17 +38,22 @@ SVG.extend(SVG.PointArray, {
 
     return new SVG.PointArray(array)
   }
-  // Parse point string
+  // Parse point string and flat array
 , parse: function(array) {
     var points = []
 
     array = array.valueOf()
 
-    // if already is an array, no need to parse it
-    if (Array.isArray(array)) return array
-
-    // parse points
-    array = array.trim().split(/\s+|,/)
+    // if it is an array
+    if (Array.isArray(array)) {
+      // and it is not flat, there is no need to parse it
+      if(Array.isArray(array[0])) {
+        return array
+      }
+    } else { // Else, it is considered as a string
+      // parse points
+      array = array.trim().split(/[\s,]+/)
+    }
 
     // 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.
@@ -94,4 +99,4 @@ SVG.extend(SVG.PointArray, {
     return SVG.parser.poly.getBBox()
   }
 
-})
\ No newline at end of file
+})