# HG changeset patch
# User Thinker K.F. Li <thinker@codemud.net>
# Date 1285411597 -28800
# Node ID ac3e8492ad747090441917b4458e630bbe25c226
# Parent  44f46d6873be9701f5577472d54ae0e3e20f7100
Formalize path data for MadButterfly.

Inkscape and other editors would omit 'l' or 'L' after 'm' or 'M'.
MadButterfly can not handle it, now.  So, we work around it at SVG
parser.

diff -r 44f46d6873be -r ac3e8492ad74 nodejs/svg.js
--- a/nodejs/svg.js	Sat Sep 25 17:43:39 2010 +0800
+++ b/nodejs/svg.js	Sat Sep 25 18:46:37 2010 +0800
@@ -703,12 +703,51 @@
     tgt.stroke_width = stroke_width;
 };
 
+function formalize_path_data(d) {
+    var posM, posm;
+    var pos;
+    var nums = "0123456789+-.";
+    var rel = false;
+    var cmd;
+
+    posM = d.search("M");
+    posm = d.search("m");
+    pos = posm < posM? posm: posM;
+    if(pos == -1)
+	pos = posM == -1? posm: posM;
+    if(pos == -1)
+	return d;
+
+    if(posm == pos)
+	rel = true;
+    
+    pos = pos + 1;
+    while(pos < d.length && " ,".search(d[pos]) >= 0)
+	pos++;
+    while(pos < d.length && nums.search(d[pos]) >= 0)
+	pos++;
+    while(pos < d.length && " ,".search(d[pos]) >= 0)
+	pos++;
+    while(pos < d.length && nums.search(d[pos]) >= 0)
+	pos++;
+    while(pos < d.length && " ,".search(d[pos]) >= 0)
+	pos++;
+    if(nums.search(d[pos]) >= 0) {
+	if(rel)
+	    cmd = "l";
+	else
+	    cmd = "L";
+	d = d.substring(0, pos) + cmd + formalize_path_data(d.substring(pos));
+    }
+    return d;
+}
+
 loadSVG.prototype.parsePath=function(accu, coord,id, n)
 {
-    var d = n.attr('d').value();
+    var d = formalize_path_data(n.attr('d').value());
     var style = n.attr('style');
     var path = this.mb_rt.path_new(d);
-    
+
     guessPathBoundingBox(coord,d);
     coord.add_shape(path);
     this._set_paint(n, path);