From ef0aea3aac8735ae5394b23eb62f53d499d490ca Mon Sep 17 00:00:00 2001
From: Yury Popov <phoenix@Mac-Pro-Yury.local>
Date: Wed, 13 May 2015 01:51:26 +0300
Subject: [PATCH] SVG bounds calculation

---
 pxSVG/pxSVGRenderPath.m | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/pxSVG/pxSVGRenderPath.m b/pxSVG/pxSVGRenderPath.m
index eb28a41..f4f21d2 100644
--- a/pxSVG/pxSVGRenderPath.m
+++ b/pxSVG/pxSVGRenderPath.m
@@ -24,6 +24,7 @@ + (instancetype)pathWithXML:(pxXMLNode *)xmlNode
 - (instancetype)initWithXML:(pxXMLNode *)xmlNode
 {
     self = [super init];
+    self.root = [self parseObject:xmlNode];
     if ([xmlNode.attributes objectForKey:@"width"] &&
         [xmlNode.attributes objectForKey:@"height"]) {
         CGPoint o = CGPointZero;
@@ -52,11 +53,25 @@ - (instancetype)initWithXML:(pxXMLNode *)xmlNode
             }
         };
     } else {
-        self.bounds = CGRectNull;
+        self.bounds = [self objBounds:self.root];
     }
-    self.root = [self parseObject:xmlNode];
     return self;
 }
+- (CGRect) objBounds:(pxSVGObject*)obj
+{
+    if ([obj respondsToSelector:@selector(d)]) {
+        UIBezierPath *path = [(id)obj d];
+        if (path) return CGRectApplyAffineTransform(path.bounds, CATransform3DGetAffineTransform(obj.transform));
+    }
+    if ([obj respondsToSelector:@selector(subnodes)]) {
+        CGRect f = CGRectNull;
+        for (pxSVGObject *o in [(id)obj subnodes]) {
+            f = CGRectUnion(f, [self objBounds:o]);
+        }
+        return CGRectApplyAffineTransform(f, CATransform3DGetAffineTransform(obj.transform));
+    }
+    return CGRectNull;
+}
 - (pxSVGObject*)parseObject:(pxXMLNode*)node
 {
     if ([node.tagName rangeOfString:@":"].location != NSNotFound) return nil;