fix: handle empty image title in pdf conversions

globals/version.go

@@ -1,3 +1,3 @@
 package globals
 
-const Version = "2.7.3"
+const Version = "2.7.4"

pdf/conversions/image.go

@@ -55,10 +55,6 @@ func Image(image *ast.Image, node ast.Node) (retO *spec.XObject, retA *spec.Adda
 	titlePara := String(string(image.Title))
 	titleSegs := (*titlePara).(*elements.Paragraph).Segments
 	para.Add(titleSegs...)
-	//para.Add(&spec.Segment{
-	//	Content: string(image.Title),
-	//	Font:    spec.SerifRegular,
-	//})
 	var a spec.Addable = &para
 	retP = &a
 	return

pdf/conversions/string.go

@@ -4,14 +4,15 @@ import (
 	"github.com/sett17/mdpaper/v2/globals"
 	goldmark_cite "github.com/sett17/mdpaper/v2/goldmark-cite"
 	goldmark_figref "github.com/sett17/mdpaper/v2/goldmark-figref"
+	"github.com/sett17/mdpaper/v2/pdf/elements"
 	"github.com/sett17/mdpaper/v2/pdf/spec"
 	"github.com/yuin/goldmark"
 	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/text"
 	"strings"
 )
 
-func String(s string) *spec.Addable {
+func String(s string) (ret *spec.Addable) {
 	p := goldmark.New(
 		goldmark.WithExtensions(
 			&goldmark_cite.CitationExtension{},
@@ -23,7 +24,23 @@ func String(s string) *spec.Addable {
 	prevFile := globals.File
 	globals.File = buf
 	parsed := p.Parse(text.NewReader(buf))
-	ret := Paragraph(parsed.FirstChild().(*ast.Paragraph), false)
+	if para, ok := parsed.FirstChild().(*ast.Paragraph); ok {
+		ret = Paragraph(para, false)
+	} else {
+		para := elements.Paragraph{
+			Text: spec.Text{
+				FontSize:   globals.Cfg.Text.FontSize,
+				LineHeight: globals.Cfg.Text.LineHeight,
+			},
+		}
+		emptySeg := spec.Segment{
+			Content: "",
+			Font:    spec.SerifRegular,
+		}
+		para.Add(&emptySeg)
+		var a spec.Addable = &para
+		ret = &a
+	}
 	globals.File = prevFile
 
 	return ret