Added TextRendererFactory.

textRender.go

@@ -12,6 +12,11 @@ type TextRender interface {
 	RenderSequence(start, end int, lastColor, background Attribute) RenderedSequence
 }
 
+// TextRendererFactory is factory for creating text renderers.
+type TextRendererFactory interface {
+	TextRenderer(text string) TextRender
+}
+
 // MarkdownRegex is used by MarkdownTextRenderer to determine how to format the
 // text.
 const MarkdownRegex = `(?:\[([^]]+)\])\(([a-z\s,]+)\)`
@@ -124,6 +129,15 @@ func (r MarkdownTextRenderer) RenderSequence(start, end int, lastColor, backgrou
 	return RenderedSequence{string(runes), lastColor, background, sequences, nil}
 }
 
+// MarkdownTextRendererFactory is a TextRendererFactory for
+// the MarkdownTextRenderer.
+type MarkdownTextRendererFactory struct{}
+
+// TextRenderer returns a MarkdownTextRenderer instance.
+func (f MarkdownTextRendererFactory) TextRenderer(text string) TextRender {
+	return MarkdownTextRenderer{text}
+}
+
 // RenderedSequence is a string sequence that is capable of returning the
 // Buffer used by termui for displaying the colorful string.
 type RenderedSequence struct {
@@ -220,3 +234,12 @@ func (r NoopRenderer) RenderSequence(start, end int, lastColor, background Attri
 func (r NoopRenderer) Render(lastColor, background Attribute) RenderedSequence {
 	return r.RenderSequence(0, -1, lastColor, background)
 }
+
+// NoopRendererFactory is a TextRendererFactory for
+// the NoopRenderer.
+type NoopRendererFactory struct{}
+
+// TextRenderer returns a NoopRenderer instance.
+func (f NoopRendererFactory) TextRenderer(text string) TextRender {
+	return NoopRenderer{text}
+}

textRender_test.go

@@ -16,6 +16,13 @@ func TestTextRender_TestInterface(t *testing.T) {
 	assert.Implements(t, inter, new(NoopRenderer))
 }
 
+func TestTextRendererFactory_TestInterface(t *testing.T) {
+	var inter *TextRendererFactory
+
+	assert.Implements(t, inter, new(MarkdownTextRendererFactory))
+	assert.Implements(t, inter, new(NoopRendererFactory))
+}
+
 func TestMarkdownTextRenderer_normalizeText(t *testing.T) {
 	renderer := MarkdownTextRenderer{}
 
@@ -135,6 +142,12 @@ func TestMarkdownTextRenderer_Render(t *testing.T) {
 	}
 }
 
+func TestMarkdownTextRendererFactory(t *testing.T) {
+	factory := MarkdownTextRendererFactory{}
+	expected := MarkdownTextRenderer{"Hello world"}
+	assert.Equal(t, factory.TextRenderer("Hello world"), expected)
+}
+
 func TestColorSubsequencesToMap(t *testing.T) {
 	colorSubsequences := []ColorSubsequence{
 		{ColorRed, 1, 4},
@@ -241,6 +254,12 @@ func TestNoopRenderer_RenderSequence(t *testing.T) {
 	assertRenderSequence(t, got, 9, 1, "ll", 0)
 }
 
+func TestNoopRendererFactory(t *testing.T) {
+	factory := NoopRendererFactory{}
+	expected := NoopRenderer{"Hello world"}
+	assert.Equal(t, factory.TextRenderer("Hello world"), expected)
+}
+
 func TestPosUnicode(t *testing.T) {
 	// Every characters takes 3 bytes
 	text := "你好世界"