unified all boxes (#634)

unified all boxes

- SVG.Box for everything
- bbox, rbox and viewbox as methods
- boxes can be created with string, array, object, list...
- added helper to simplify boxes code

1 files changed, 15 insertions, 1 deletions

diff --git a/src/helpers.js b/src/helpers.js
index b04c506..41f9620 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -1,3 +1,17 @@
+function isNulledBox(box) {
+  return !box.w && !box.h && !box.x && !box.y
+}
+
+function domContains(node) {
+  return (document.documentElement.contains || function(node) {
+    // This is IE - it does not support contains() for top-level SVGs
+    while (node.parentNode){
+      node = node.parentNode;
+    }
+    return node == document
+  }).call(document.documentElement, node)
+}
+
 function pathRegReplace(a, b, c, d) {
   return c + d.replace(SVG.regex.dots, ' .')
 }
@@ -185,4 +199,4 @@ function idFromReference(url) {
 }
 
 // Create matrix array for looping
-var abcdef = 'abcdef'.split('')
\ No newline at end of file
+var abcdef = 'abcdef'.split('')