feat: Issues-116 support options for WriteToTTML (#117)

* feat: Issues-116 support options for WriteToTTML Issue: #116 * chore: rename TestTTMLWithOptionsNoIndent to TestWriteToTTMLWithIndentOption link: #117 (comment) * chore: use ./testdata/example-in.ttml link: #117 (comment) --------- Co-authored-by: Min <[email protected]>
asticode · Oct 7, 2024 · a3932fd · a3932fd
1 parent d27006f
commit a3932fd
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Showing 3 changed files with 44 additions and 2 deletions.
diff --git a/testdata/example-out-no-indent.ttml b/testdata/example-out-no-indent.ttml
@@ -0,0 +1 @@
+<tt xmlns="http://www.w3.org/ns/ttml" xml:lang="fr" xmlns:ttm="http://www.w3.org/ns/ttml#metadata" xmlns:tts="http://www.w3.org/ns/ttml#styling"><head><metadata><ttm:copyright>Copyright test</ttm:copyright><ttm:title>Title test</ttm:title></metadata><styling><style xml:id="style_0" style="style_2" tts:color="white" tts:extent="100% 10%" tts:fontFamily="sansSerif" tts:fontStyle="normal" tts:origin="0% 90%" tts:textAlign="center"></style><style xml:id="style_1" tts:color="white" tts:extent="100% 13%" tts:fontFamily="sansSerif" tts:fontStyle="normal" tts:origin="0% 87%" tts:textAlign="center"></style><style xml:id="style_2" tts:color="white" tts:extent="100% 20%" tts:fontFamily="sansSerif" tts:fontStyle="normal" tts:origin="0% 80%" tts:textAlign="center"></style></styling><layout><region xml:id="region_0" style="style_0" tts:color="blue"></region><region xml:id="region_1" style="style_1"></region><region xml:id="region_2" style="style_2"></region></layout></head><body><div><p begin="00:01:39.000" end="00:01:41.040" region="region_1" style="style_1" tts:color="red"><span style="style_1" tts:color="black">(deep rumbling)</span></p><p begin="00:02:04.080" end="00:02:07.120" region="region_2"><span>MAN:</span><br></br><span>How did we </span><span style="style_1" tts:color="green">end up </span><span>here?</span></p><p begin="00:02:12.160" end="00:02:15.200" region="region_1"><span style="style_1">This place is horrible.</span></p><p begin="00:02:20.240" end="00:02:22.280" region="region_1"><span style="style_1">Smells like balls.</span></p><p begin="00:02:28.320" end="00:02:31.360" region="region_2"><span style="style_2">We don&#39;t belong</span><br></br><span style="style_1">in this shithole.</span></p><p begin="00:02:31.400" end="00:02:33.440" region="region_2"><span style="style_2">(computer playing</span><br></br><span style="style_1">electronic melody)</span></p></div></body></tt>
diff --git a/ttml.go b/ttml.go
@@ -596,8 +596,29 @@ func (t TTMLOutDuration) MarshalText() ([]byte, error) {
 	return []byte(formatDuration(time.Duration(t), ".", 3)), nil
 }
 
+// WriteToTTMLOptions represents TTML write options.
+type WriteToTTMLOptions struct {
+	Indent string // Default is 4 spaces.
+}
+
+// WriteToTTMLOption represents a WriteToTTML option.
+type WriteToTTMLOption func(o *WriteToTTMLOptions)
+
+// WriteToTTMLWithIndentOption sets the indent option.
+func WriteToTTMLWithIndentOption(indent string) WriteToTTMLOption {
+	return func(o *WriteToTTMLOptions) {
+		o.Indent = indent
+	}
+}
+
 // WriteToTTML writes subtitles in .ttml format
-func (s Subtitles) WriteToTTML(o io.Writer) (err error) {
+func (s Subtitles) WriteToTTML(o io.Writer, opts ...WriteToTTMLOption) (err error) {
+	// Create write options
+	wo := &WriteToTTMLOptions{Indent: "    "}
+	for _, opt := range opts {
+		opt(wo)
+	}
+
 	// Do not write anything if no subtitles
 	if len(s.Items) == 0 {
 		return ErrNoSubtitlesToWrite
@@ -714,7 +735,10 @@ func (s Subtitles) WriteToTTML(o io.Writer) (err error) {
 
 	// Marshal XML
 	var e = xml.NewEncoder(o)
-	e.Indent("", "    ")
+
+	// Set indent
+	e.Indent("", wo.Indent)
+
 	if err = e.Encode(ttml); err != nil {
 		err = fmt.Errorf("astisub: xml encoding failed: %w", err)
 		return

diff --git a/ttml_test.go b/ttml_test.go
@@ -68,3 +68,20 @@ func TestTTMLBreakLines(t *testing.T) {
 
 	assert.Equal(t, strings.TrimSpace(string(c)), strings.TrimSpace(w.String()))
 }
+
+func TestWriteToTTMLWithIndentOption(t *testing.T) {
+	// Open
+	s, err := astisub.OpenFile("./testdata/example-in.ttml")
+	assert.NoError(t, err)
+
+	// Write
+	w := &bytes.Buffer{}
+
+	err = s.WriteToTTML(w, astisub.WriteToTTMLWithIndentOption(""))
+	assert.NoError(t, err)
+
+	c, err := ioutil.ReadFile("./testdata/example-out-no-indent.ttml")
+	assert.NoError(t, err)
+
+	assert.Equal(t, strings.TrimSpace(string(c)), strings.TrimSpace(w.String()))
+}