added SVG.Box, added transform method to boxes, fix rbox (#626)

added SVG.Box, added transform method to boxes, fix rbox

Also:
- workaround for screenCTM with nested svg (FF bug)
- remove unneeded workaround in toParent()
- rbox accepts additional parameter to transform the box

1 files changed, 4 insertions, 10 deletions

diff --git a/src/set.js b/src/set.js
index 41289dd..9da52c7 100644
--- a/src/set.js
+++ b/src/set.js
@@ -70,25 +70,19 @@ SVG.Set = SVG.invent({
     }
     // Get the bounding box of all members included or empty box if set has no items
   , bbox: function(){
-      var box = new SVG.BBox()
-
       // return an empty box of there are no members
       if (this.members.length == 0)
-        return box
+        return new SVG.RBox()
 
       // get the first rbox and update the target bbox
-      var rbox = this.members[0].rbox()
-      box.x      = rbox.x
-      box.y      = rbox.y
-      box.width  = rbox.width
-      box.height = rbox.height
+      var rbox = this.members[0].rbox(this.members[0].doc())
 
       this.each(function() {
         // user rbox for correct position and visual representation
-        box = box.merge(this.rbox())
+        rbox = rbox.merge(this.rbox(this.doc()))
       })
 
-      return box
+      return rbox
     }
   }