rename IsPlainText -> IsText (#155)

to better match the other Part kinds.

Author: randall77

go/ai/document.go

@@ -72,7 +72,7 @@ func NewToolResponsePart(r *ToolResponse) *Part {
 }
 
 // IsText reports whether the [Part] contains plain text.
-func (p *Part) IsPlainText() bool {
+func (p *Part) IsText() bool {
 	return p.kind == partText
 }
 

go/ai/document_test.go

@@ -29,8 +29,8 @@ func TestDocumentFromText(t *testing.T) {
 		t.Fatalf("got %d parts, want 1", len(d.Content))
 	}
 	p := d.Content[0]
-	if !p.IsPlainText() {
-		t.Errorf("IsPlainText() == %t, want %t", p.IsPlainText(), true)
+	if !p.IsText() {
+		t.Errorf("IsText() == %t, want %t", p.IsText(), true)
 	}
 	if got := p.Text(); got != data {
 		t.Errorf("Data() == %q, want %q", got, data)

go/genkit/dotprompt/render.go

@@ -38,7 +38,7 @@ func (p *Prompt) RenderText(variables map[string]any) (string, error) {
 	}
 	var sb strings.Builder
 	for _, part := range msgs[0].Content {
-		if !part.IsPlainText() {
+		if !part.IsText() {
 			return "", errors.New("RenderText: multi-modal prompt can't be rendered as text")
 		}
 		sb.WriteString(part.Text())

go/genkit/dotprompt/render_test.go

@@ -198,7 +198,7 @@ func TestRenderMessages(t *testing.T) {
 	}
 
 	cmpPart := func(a, b *ai.Part) bool {
-		if a.IsPlainText() != b.IsPlainText() {
+		if a.IsText() != b.IsText() {
 			return false
 		}
 		if a.Text() != b.Text() {

go/plugins/googleai/googleai.go

@@ -263,7 +263,7 @@ func convertParts(parts []*ai.Part) []genai.Part {
 // convertPart converts a *ai.Part to a genai.Part.
 func convertPart(p *ai.Part) genai.Part {
 	switch {
-	case p.IsPlainText():
+	case p.IsText():
 		return genai.Text(p.Text())
 	case p.IsBlob():
 		return genai.Blob{MIMEType: p.ContentType(), Data: []byte(p.Text())}

go/plugins/vertexai/vertexai.go

@@ -157,7 +157,7 @@ func convertParts(parts []*ai.Part) []genai.Part {
 // convertPart converts a *ai.Part to a genai.Part.
 func convertPart(p *ai.Part) genai.Part {
 	switch {
-	case p.IsPlainText():
+	case p.IsText():
 		return genai.Text(p.Text())
 	default:
 		return genai.Blob{MIMEType: p.ContentType(), Data: []byte(p.Text())}