If no map in wtg then display the canvas

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owulveryck · Jun 12, 2023 · dd11d60 · dd11d60
2 parents 885baaa + f1943ad
commit dd11d60
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Showing 3 changed files with 6 additions and 3 deletions.
diff --git a/examples/webassembly/wasm/main.go b/examples/webassembly/wasm/main.go
@@ -124,7 +124,7 @@ func wtg2SVG(s string, width int, height int, withAnnotations bool) (string, err
 
 	buf := bytes.NewBufferString(s)
 	err := p.Parse(buf)
-	if err != nil {
+	if err != nil && err != wtg.ErrEmptyMap {
 		return "", err
 	}
 	if len(p.InvalidEntries) != 0 {

diff --git a/examples/wtg2svg/main.go b/examples/wtg2svg/main.go
@@ -40,7 +40,7 @@ func main() {
 	p := wtg.NewParser()
 
 	err = p.Parse(os.Stdin)
-	if err != nil {
+	if err != nil && err != wtg.ErrEmptyMap {
 		log.Fatal(err)
 	}
 	if len(p.InvalidEntries) != 0 {

diff --git a/parser/wtg/parse.go b/parser/wtg/parse.go
@@ -1,6 +1,7 @@
 package wtg
 
 import (
+	"errors"
 	"fmt"
 	"image"
 	"io"
@@ -11,6 +12,8 @@ import (
 	svgmap "github.com/owulveryck/wardleyToGo/encoding/svg"
 )
 
+var ErrEmptyMap = errors.New("no map")
+
 type Parser struct {
 	visibilityOnly  bool
 	WMap            *wardleyToGo.Map
@@ -60,7 +63,7 @@ func (p *Parser) parse(s string) error {
 		return fmt.Errorf("error in parsing: %w", err)
 	}
 	if len(inv.NodeInventory) == 0 {
-		return fmt.Errorf("no map")
+		return ErrEmptyMap
 	}
 	m, err := consolidateMap(inv.NodeInventory, inv.EdgeInventory)
 	if err != nil {