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, 9 insertions, 6 deletions

diff --git a/src/path.js b/src/path.js
index f49e950..55ac5fd 100644
--- a/src/path.js
+++ b/src/path.js
@@ -15,7 +15,9 @@ SVG.Path = SVG.invent({
     }
     // Plot new poly points
   , plot: function(p) {
-      return this.attr('d', (this._array = new SVG.PathArray(p)))
+      return (p == null) ?
+        this.array() :
+        this.attr('d', (this._array = new SVG.PathArray(p)))
     }
     // Move by left top corner
   , move: function(x, y) {
@@ -32,7 +34,7 @@ SVG.Path = SVG.invent({
     // Set element size to given width and height
   , size: function(width, height) {
       var p = proportionalSize(this, width, height)
-      
+
       return this.attr('d', this.array().size(p.width, p.height))
     }
     // Set width of element
@@ -43,14 +45,15 @@ SVG.Path = SVG.invent({
   , height: function(height) {
       return height == null ? this.bbox().height : this.size(this.bbox().width, height)
     }
-    
+
   }
-  
+
   // Add parent method
 , construct: {
     // Create a wrapped path element
     path: function(d) {
-      return this.put(new SVG.Path).plot(d)
+      // make sure plot is called as a setter
+      return this.put(new SVG.Path).plot(d != null ? d : new SVG.PathArray)
     }
   }
-})
\ No newline at end of file
+})