SVG bounds calculation

djphoenix · May 12, 2015 · ef0aea3 · ef0aea3
1 parent 71cec95
commit ef0aea3
Showing 1 changed file with 17 additions and 2 deletions.
diff --git 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;