Move text sanitizing to RenderContext

context.go

@@ -1,8 +1,37 @@
 package gold
 
+import (
+	"html"
+	"strings"
+
+	"github.com/microcosm-cc/bluemonday"
+)
+
 type RenderContext struct {
-	style      map[StyleType]ElementStyle
+	options Options
+	style   map[StyleType]ElementStyle
+
 	blockStack *BlockStack
 	table      *TableElement
-	options    Options
+
+	stripper *bluemonday.Policy
+}
+
+func NewRenderContext(options Options) RenderContext {
+	return RenderContext{
+		options:    options,
+		style:      make(map[StyleType]ElementStyle),
+		blockStack: &BlockStack{},
+		table:      &TableElement{},
+		stripper:   bluemonday.StrictPolicy(),
+	}
+}
+
+func (ctx RenderContext) SanitizeHTML(s string, trimSpaces bool) string {
+	s = ctx.stripper.Sanitize(s)
+	if trimSpaces {
+		s = strings.TrimSpace(s)
+	}
+
+	return html.UnescapeString(s)
 }