Move stateful objects to RenderContext struct

image.go

@@ -10,10 +10,12 @@ type ImageElement struct {
 }
 
 func (e *ImageElement) Render(w io.Writer, node *bf.Node, tr *TermRenderer) error {
+	ctx := tr.context
+
 	if len(node.LastChild.Literal) > 0 {
 		el := &BaseElement{
 			Token: string(node.LastChild.Literal),
-			Style: tr.style[ImageText],
+			Style: ctx.style[ImageText],
 		}
 		err := el.Render(w, node.LastChild, tr)
 		if err != nil {
@@ -24,7 +26,7 @@ func (e *ImageElement) Render(w io.Writer, node *bf.Node, tr *TermRenderer) erro
 		el := &BaseElement{
 			Token:  resolveRelativeURL(tr.BaseURL, string(node.LinkData.Destination)),
 			Prefix: " ",
-			Style:  tr.style[Image],
+			Style:  ctx.style[Image],
 		}
 		err := el.Render(w, node, tr)
 		if err != nil {