add Textspan...Span...TextEnd

README.markdown

@@ -168,6 +168,7 @@ A video describing how to use the package can be seen on YouTube at <http://www.
 * richter:	Gerhard Richter's 256 colors
 * rl:			Random lines (port of a Processing demo)
 * skewabc:		Skew ABC
+* span:		Text span
 * stockproduct:	Visualize product and stock prices
 * svgopher:	SVGo Mascot
 * svgplay: SVGo sketching server
@@ -482,8 +483,19 @@ is used to specify inputs and results for filter effects
  ![Image](http://farm5.static.flickr.com/4058/5188556346_e5ce3dcbc2_m.jpg)
 
 	Text(x int, y int, t string, s ...string)
-  Place the specified text, t at x,y according to the style specified in s.
+  Place the specified text, t at x,y according to the optional style specified in s.
   <http://www.w3.org/TR/SVG11/text.html#TextElement>
+
+	Textspan(x int, y int, t string, s ...string)
+Place specified text, t at x,y according to the optional style specified in s.
+<https://www.w3.org/TR/SVG11/text.html#TSpanElement>
+Use this method with Span(...). End with TextEnd()
+
+	Span(t string, s ...string)
+Create a text span t, using optional style s
+
+	TextEnd()
+End a text span
 
 	Textlines(x, y int, s []string, size, spacing int, fill, align string)
  Places lines of text in s, starting at x,y, at the specified size, fill, and alignment, and spacing.

span/span.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+
+	svg "github.com/ajstarks/svgo"
+)
+
+func main() {
+	width := 500
+	height := 500
+	canvas := svg.New(os.Stdout)
+	canvas.Start(width, height)
+	canvas.Circle(width/2, height/2, 100)
+	canvas.Gstyle("text-anchor:middle;font-family:sans;fill:white")
+	canvas.Textspan(width/2, height/2, "Hello ", "font-size:30px")
+	canvas.Span("SVG", "font-family:serif;font-size:50px;fill:yellow")
+	canvas.TextEnd()
+	canvas.Gend()
+	canvas.End()
+}

svg.go

@@ -411,6 +411,31 @@ func (svg *SVG) Text(x int, y int, t string, s ...string) {
 	svg.println(`</text>`)
 }
 
+// Textspan begins text, assuming a tspan will be included, end with TextEnd()
+// Standard Reference: https://www.w3.org/TR/SVG11/text.html#TSpanElement
+func (svg *SVG) Textspan(x int, y int, t string, s ...string) {
+	svg.printf(`<text %s %s`, loc(x, y), endstyle(s, ">"))
+	xml.Escape(svg.Writer, []byte(t))
+}
+
+// Span makes styled spanned text, should be proceeded by Textspan
+// Standard Reference: https://www.w3.org/TR/SVG11/text.html#TSpanElement
+func (svg *SVG) Span(t string, s ...string) {
+	if len(s) == 0 {
+		xml.Escape(svg.Writer, []byte(t))
+		return
+	}
+	svg.printf(`<tspan %s`, endstyle(s, ">"))
+	xml.Escape(svg.Writer, []byte(t))
+	svg.printf(`</tspan>`)
+}
+
+// TextEnd ends spanned text
+// Standard Reference: https://www.w3.org/TR/SVG11/text.html#TSpanElement
+func (svg *SVG) TextEnd() {
+	svg.println(`</text>`)
+}
+
 // Textpath places text optionally styled text along a previously defined path
 // Standard Reference: http://www.w3.org/TR/SVG11/text.html#TextPathElement
 func (svg *SVG) Textpath(t string, pathid string, s ...string) {