From 633bc0d0aa6ee24962a6b55c1e9231aab744c4ea Mon Sep 17 00:00:00 2001
From: hashworks <mail@hashworks.net>
Date: Fri, 12 Oct 2018 23:51:25 +0200
Subject: [PATCH] Add type classes on class output

Without this it is quite difficult to differentiate between fill and
stroke elements, f.e. with basic charts with fillings or legends
generally:
`svg path:nth-last-of-type(2).legend`

Text elements needed to be accessed with text.classname which
isn't really best practise.

This way they can be accessed easier:
`svg .legend.fill`
---
 vector_renderer.go | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/vector_renderer.go b/vector_renderer.go
index 71c6a86..0d7fc76 100644
--- a/vector_renderer.go
+++ b/vector_renderer.go
@@ -311,15 +311,28 @@ func (c *canvas) getFontFace(s Style) string {
 
 // styleAsSVG returns the style as a svg style or class string.
 func (c *canvas) styleAsSVG(s Style) string {
-	if s.ClassName != "" {
-		return fmt.Sprintf("class=\"%s\"", s.ClassName)
-	}
 	sw := s.StrokeWidth
 	sc := s.StrokeColor
 	fc := s.FillColor
 	fs := s.FontSize
 	fnc := s.FontColor
 
+	if s.ClassName != "" {
+		var classes []string
+		classes = append(classes, s.ClassName)
+		if !sc.IsZero() {
+			classes = append(classes, "stroke")
+		}
+		if !fc.IsZero() {
+			classes = append(classes, "fill")
+		}
+		if fs != 0 || s.Font != nil {
+			classes = append(classes, "text")
+		}
+
+		return fmt.Sprintf("class=\"%s\"", strings.Join(classes, " "))
+	}
+
 	var pieces []string
 
 	if sw != 0 {