mirror of
https://github.com/go-gitea/gitea.git
synced 2025-12-14 21:15:18 +08:00
fix
This commit is contained in:
wxiaoguang
parent
432e128074
commit
29f4d6cf9f
@ -26,9 +26,11 @@ type ConvertOpts struct {
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KeepBOM bool
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}
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var ToUTF8WithFallbackReaderPrefetchSize = 16 * 1024
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// ToUTF8WithFallbackReader detects the encoding of content and converts to UTF-8 reader if possible
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func ToUTF8WithFallbackReader(rd io.Reader, opts ConvertOpts) io.Reader {
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buf := make([]byte, 2048)
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buf := make([]byte, ToUTF8WithFallbackReaderPrefetchSize)
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n, err := util.ReadAtMost(rd, buf)
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if err != nil {
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return io.MultiReader(bytes.NewReader(MaybeRemoveBOM(buf[:n], opts)), rd)
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@ -41,6 +43,7 @@ func ToUTF8WithFallbackReader(rd io.Reader, opts ConvertOpts) io.Reader {
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encoding, _ := charset.Lookup(charsetLabel)
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if encoding == nil {
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log.Error("Unknown encoding: %s", charsetLabel)
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return io.MultiReader(bytes.NewReader(buf[:n]), rd)
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}
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@ -54,17 +57,18 @@ func ToUTF8WithFallbackReader(rd io.Reader, opts ConvertOpts) io.Reader {
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}
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// ToUTF8 converts content to UTF8 encoding
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func ToUTF8(content []byte, opts ConvertOpts) (string, error) {
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func ToUTF8(content []byte, opts ConvertOpts) ([]byte, error) {
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charsetLabel, err := DetectEncoding(content)
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if err != nil {
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return "", err
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return content, err
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} else if charsetLabel == "UTF-8" {
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return string(MaybeRemoveBOM(content, opts)), nil
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return MaybeRemoveBOM(content, opts), nil
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}
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encoding, _ := charset.Lookup(charsetLabel)
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if encoding == nil {
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return string(content), fmt.Errorf("Unknown encoding: %s", charsetLabel)
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log.Error("Unknown encoding: %s", charsetLabel)
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return content, fmt.Errorf("unknown encoding: %s", charsetLabel)
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}
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// If there is an error, we concatenate the nicely decoded part and the
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@ -76,7 +80,7 @@ func ToUTF8(content []byte, opts ConvertOpts) (string, error) {
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result = MaybeRemoveBOM(result, opts)
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return string(result), err
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return result, err
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}
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// ToUTF8WithFallback detects the encoding of content and converts to UTF-8 if possible
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@ -94,6 +98,7 @@ func ToUTF8DropErrors(content []byte, opts ConvertOpts) []byte {
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encoding, _ := charset.Lookup(charsetLabel)
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if encoding == nil {
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log.Error("Unknown encoding: %s", charsetLabel)
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return content
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}
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@ -130,28 +135,37 @@ func MaybeRemoveBOM(content []byte, opts ConvertOpts) []byte {
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}
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// DetectEncoding detect the encoding of content
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func DetectEncoding(content []byte) (string, error) {
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// it always returns a detected or guessed "encoding" string, no matter error happens or not
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func DetectEncoding(content []byte) (encoding string, _ error) {
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// First we check if the content represents valid utf8 content excepting a truncated character at the end.
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// Now we could decode all the runes in turn but this is not necessarily the cheapest thing to do
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// instead we walk backwards from the end to trim off a the incomplete character
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// instead we walk backwards from the end to trim off the incomplete character
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toValidate := content
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end := len(toValidate) - 1
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if end < 0 {
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// no-op
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} else if toValidate[end]>>5 == 0b110 {
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// Incomplete 1 byte extension e.g. © <c2><a9> which has been truncated to <c2>
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toValidate = toValidate[:end]
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} else if end > 0 && toValidate[end]>>6 == 0b10 && toValidate[end-1]>>4 == 0b1110 {
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// Incomplete 2 byte extension e.g. ⛔ <e2><9b><94> which has been truncated to <e2><9b>
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toValidate = toValidate[:end-1]
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} else if end > 1 && toValidate[end]>>6 == 0b10 && toValidate[end-1]>>6 == 0b10 && toValidate[end-2]>>3 == 0b11110 {
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// Incomplete 3 byte extension e.g. 💩 <f0><9f><92><a9> which has been truncated to <f0><9f><92>
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toValidate = toValidate[:end-2]
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// U+0000 U+007F 0yyyzzzz
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// U+0080 U+07FF 110xxxyy 10yyzzzz
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// U+0800 U+FFFF 1110wwww 10xxxxyy 10yyzzzz
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// U+010000 U+10FFFF 11110uvv 10vvwwww 10xxxxyy 10yyzzzz
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cnt := 0
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for end >= 0 && cnt < 4 {
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c := toValidate[end]
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if c>>5 == 0b110 || c>>4 == 0b1110 || c>>3 == 0b11110 {
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// a leading byte
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toValidate = toValidate[:end]
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break
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} else if c>>6 == 0b10 {
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// a continuation byte
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end--
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} else {
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// not an utf-8 byte
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break
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}
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cnt++
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}
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if utf8.Valid(toValidate) {
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log.Debug("Detected encoding: utf-8 (fast)")
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return "UTF-8", nil
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}
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@ -160,7 +174,7 @@ func DetectEncoding(content []byte) (string, error) {
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if len(content) < 1024 {
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// Check if original content is valid
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if _, err := textDetector.DetectBest(content); err != nil {
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return "", err
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return util.IfZero(setting.Repository.AnsiCharset, "UTF-8"), err
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}
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times := 1024 / len(content)
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detectContent = make([]byte, 0, times*len(content))
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@ -171,14 +185,10 @@ func DetectEncoding(content []byte) (string, error) {
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detectContent = content
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}
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// Now we can't use DetectBest or just results[0] because the result isn't stable - so we need a tie break
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// Now we can't use DetectBest or just results[0] because the result isn't stable - so we need a tie-break
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results, err := textDetector.DetectAll(detectContent)
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if err != nil {
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if err == chardet.NotDetectedError && len(setting.Repository.AnsiCharset) > 0 {
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log.Debug("Using default AnsiCharset: %s", setting.Repository.AnsiCharset)
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return setting.Repository.AnsiCharset, nil
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}
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return "", err
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return util.IfZero(setting.Repository.AnsiCharset, "UTF-8"), err
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}
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topConfidence := results[0].Confidence
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@ -201,11 +211,9 @@ func DetectEncoding(content []byte) (string, error) {
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}
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// FIXME: to properly decouple this function the fallback ANSI charset should be passed as an argument
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if topResult.Charset != "UTF-8" && len(setting.Repository.AnsiCharset) > 0 {
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log.Debug("Using default AnsiCharset: %s", setting.Repository.AnsiCharset)
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if topResult.Charset != "UTF-8" && setting.Repository.AnsiCharset != "" {
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return setting.Repository.AnsiCharset, err
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}
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log.Debug("Detected encoding: %s", topResult.Charset)
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return topResult.Charset, err
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return topResult.Charset, nil
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}
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@ -4,12 +4,12 @@
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package charset
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import (
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"bytes"
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"io"
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"strings"
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"testing"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/test"
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"github.com/stretchr/testify/assert"
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)
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@ -47,12 +47,12 @@ func TestToUTF8(t *testing.T) {
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res, err := ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{})
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assert.NoError(t, err)
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assert.Equal(t, "ABC", res)
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assert.Equal(t, "ABC", string(res))
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// "áéíóú"
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res, err = ToUTF8([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{})
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assert.NoError(t, err)
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assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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// "áéíóú"
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res, err = ToUTF8([]byte{
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@ -60,7 +60,7 @@ func TestToUTF8(t *testing.T) {
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0xc3, 0xba,
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}, ConvertOpts{})
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assert.NoError(t, err)
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assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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res, err = ToUTF8([]byte{
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0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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@ -96,12 +96,11 @@ func TestToUTF8(t *testing.T) {
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assert.Equal(t, []byte{
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0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3,
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0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82,
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},
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[]byte(res))
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}, res)
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res, err = ToUTF8([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{})
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assert.NoError(t, err)
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assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res))
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assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res)
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}
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func TestToUTF8WithFallback(t *testing.T) {
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@ -231,152 +230,42 @@ func TestDetectEncoding(t *testing.T) {
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assert.Error(t, err)
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}
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func stringMustStartWith(t *testing.T, expected, value string) {
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assert.Equal(t, expected, value[:len(expected)])
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func stringMustStartWith(t *testing.T, expected string, value []byte) {
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assert.Equal(t, expected, string(value[:len(expected)]))
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}
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func stringMustEndWith(t *testing.T, expected, value string) {
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assert.Equal(t, expected, value[len(value)-len(expected):])
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func stringMustEndWith(t *testing.T, expected string, value []byte) {
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assert.Equal(t, expected, string(value[len(value)-len(expected):]))
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}
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func TestToUTF8WithFallbackReader(t *testing.T) {
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resetDefaultCharsetsOrder()
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test.MockVariableValue(&ToUTF8WithFallbackReaderPrefetchSize)
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for testLen := range 2048 {
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pattern := " test { () }\n"
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input := ""
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for len(input) < testLen {
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input += pattern
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}
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input = input[:testLen]
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input += "// Выключаем"
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rd := ToUTF8WithFallbackReader(bytes.NewReader([]byte(input)), ConvertOpts{})
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block := "aá啊🤔"
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runes := []rune(block)
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assert.Len(t, string(runes[0]), 1)
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assert.Len(t, string(runes[1]), 2)
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assert.Len(t, string(runes[2]), 3)
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assert.Len(t, string(runes[3]), 4)
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content := strings.Repeat(block, 2)
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for i := 1; i < len(content); i++ {
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encoding, err := DetectEncoding([]byte(content[:i]))
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assert.NoError(t, err)
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assert.Equal(t, "UTF-8", encoding)
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ToUTF8WithFallbackReaderPrefetchSize = i
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rd := ToUTF8WithFallbackReader(strings.NewReader(content), ConvertOpts{})
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r, _ := io.ReadAll(rd)
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assert.Equalf(t, input, string(r), "testing string len=%d", testLen)
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assert.Equal(t, content, string(r))
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}
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for _, r := range runes {
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content = "abc abc " + string(r) + string(r) + string(r)
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for i := 0; i < len(content); i++ {
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encoding, err := DetectEncoding([]byte(content[:i]))
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assert.NoError(t, err)
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assert.Equal(t, "UTF-8", encoding)
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}
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}
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truncatedOneByteExtension := failFastBytes
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encoding, _ := DetectEncoding(truncatedOneByteExtension)
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assert.Equal(t, "UTF-8", encoding)
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truncatedTwoByteExtension := failFastBytes
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truncatedTwoByteExtension[len(failFastBytes)-1] = 0x9b
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truncatedTwoByteExtension[len(failFastBytes)-2] = 0xe2
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encoding, _ = DetectEncoding(truncatedTwoByteExtension)
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assert.Equal(t, "UTF-8", encoding)
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truncatedThreeByteExtension := failFastBytes
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truncatedThreeByteExtension[len(failFastBytes)-1] = 0x92
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truncatedThreeByteExtension[len(failFastBytes)-2] = 0x9f
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truncatedThreeByteExtension[len(failFastBytes)-3] = 0xf0
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encoding, _ = DetectEncoding(truncatedThreeByteExtension)
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assert.Equal(t, "UTF-8", encoding)
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}
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var failFastBytes = []byte{
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0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2e, 0x74, 0x6f,
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0x6f, 0x6c, 0x73, 0x2e, 0x61, 0x6e, 0x74, 0x2e, 0x74, 0x61, 0x73, 0x6b, 0x64, 0x65, 0x66, 0x73, 0x2e, 0x63, 0x6f, 0x6e,
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0x64, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x4f, 0x73, 0x0a, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67,
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0x2e, 0x73, 0x70, 0x72, 0x69, 0x6e, 0x67, 0x66, 0x72, 0x61, 0x6d, 0x65, 0x77, 0x6f, 0x72, 0x6b, 0x2e, 0x62, 0x6f, 0x6f,
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0x74, 0x2e, 0x67, 0x72, 0x61, 0x64, 0x6c, 0x65, 0x2e, 0x74, 0x61, 0x73, 0x6b, 0x73, 0x2e, 0x72, 0x75, 0x6e, 0x2e, 0x42,
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0x6f, 0x6f, 0x74, 0x52, 0x75, 0x6e, 0x0a, 0x0a, 0x70, 0x6c, 0x75, 0x67, 0x69, 0x6e, 0x73, 0x20, 0x7b, 0x0a, 0x20, 0x20,
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0x65, 0x77, 0x6f, 0x72, 0x6b, 0x2e, 0x62, 0x6f, 0x6f, 0x74, 0x22, 0x29, 0x0a, 0x7d, 0x0a, 0x0a, 0x64, 0x65, 0x70, 0x65,
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0x6e, 0x64, 0x65, 0x6e, 0x63, 0x69, 0x65, 0x73, 0x20, 0x7b, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65,
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0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x28, 0x22, 0x3a,
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0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x3a, 0x61, 0x70, 0x69, 0x22, 0x29, 0x29, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x69, 0x6d,
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0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74,
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||||
0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x28, 0x22, 0x3a, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x3a, 0x64, 0x62,
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||||
0x22, 0x29, 0x29, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69,
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||||
0x6f, 0x6e, 0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x28, 0x22, 0x3a, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x3a,
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0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x22, 0x29, 0x29, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65,
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0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x28, 0x22, 0x3a,
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0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x3a, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2d, 0x66,
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0x73, 0x22, 0x29, 0x29, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74,
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0x69, 0x6f, 0x6e, 0x28, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x28, 0x22, 0x3a, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
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0x3a, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2d, 0x6d, 0x71, 0x22, 0x29, 0x29, 0x0a, 0x0a,
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0x20, 0x20, 0x20, 0x20, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x28, 0x22,
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||||
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|
||||
0x20, 0x20, 0x20, 0x20, 0x2f, 0x2f, 0x20, 0xd0,
|
||||
}
|
||||
|
||||
@ -312,11 +312,13 @@ func EditFile(ctx *context.Context) {
|
||||
ctx.ServerError("ReadAll", err)
|
||||
return
|
||||
}
|
||||
var fileContent string
|
||||
if content, err := charset.ToUTF8(buf, charset.ConvertOpts{KeepBOM: true}); err != nil {
|
||||
ctx.Data["FileContent"] = string(buf)
|
||||
fileContent = string(buf)
|
||||
} else {
|
||||
ctx.Data["FileContent"] = content
|
||||
fileContent = string(content)
|
||||
}
|
||||
ctx.Data["FileContent"] = fileContent
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -1233,10 +1233,10 @@ func GetDiffForRender(ctx context.Context, repoLink string, gitRepo *git.Reposit
|
||||
shouldFullFileHighlight := !setting.Git.DisableDiffHighlight && attrDiff.Value() == ""
|
||||
if shouldFullFileHighlight {
|
||||
if limitedContent.LeftContent != nil && limitedContent.LeftContent.buf.Len() < MaxDiffHighlightEntireFileSize {
|
||||
diffFile.highlightedLeftLines = highlightCodeLines(diffFile, true /* left */, limitedContent.LeftContent.buf.String())
|
||||
diffFile.highlightedLeftLines = highlightCodeLines(diffFile, true /* left */, limitedContent.LeftContent.buf.Bytes())
|
||||
}
|
||||
if limitedContent.RightContent != nil && limitedContent.RightContent.buf.Len() < MaxDiffHighlightEntireFileSize {
|
||||
diffFile.highlightedRightLines = highlightCodeLines(diffFile, false /* right */, limitedContent.RightContent.buf.String())
|
||||
diffFile.highlightedRightLines = highlightCodeLines(diffFile, false /* right */, limitedContent.RightContent.buf.Bytes())
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1244,9 +1244,35 @@ func GetDiffForRender(ctx context.Context, repoLink string, gitRepo *git.Reposit
|
||||
return diff, nil
|
||||
}
|
||||
|
||||
func highlightCodeLines(diffFile *DiffFile, isLeft bool, content string) map[int]template.HTML {
|
||||
func splitHighlightLines(buf []byte) (ret [][]byte) {
|
||||
lineCount := bytes.Count(buf, []byte("\n")) + 1
|
||||
ret = make([][]byte, 0, lineCount)
|
||||
nlTagClose := []byte("\n</")
|
||||
for {
|
||||
pos := bytes.IndexByte(buf, '\n')
|
||||
if pos == -1 {
|
||||
ret = append(ret, buf)
|
||||
return ret
|
||||
}
|
||||
// Chroma highlighting output sometimes have "</span>" right after \n, sometimes before.
|
||||
// * "<span>text\n</span>"
|
||||
// * "<span>text</span>\n"
|
||||
if bytes.HasPrefix(buf[pos:], nlTagClose) {
|
||||
pos1 := bytes.IndexByte(buf[pos:], '>')
|
||||
if pos1 != -1 {
|
||||
pos += pos1
|
||||
}
|
||||
}
|
||||
ret = append(ret, buf[:pos+1])
|
||||
buf = buf[pos+1:]
|
||||
}
|
||||
}
|
||||
|
||||
func highlightCodeLines(diffFile *DiffFile, isLeft bool, rawContent []byte) map[int]template.HTML {
|
||||
contentUTF8, _ := charset.ToUTF8(rawContent, charset.ConvertOpts{})
|
||||
content := util.UnsafeBytesToString(contentUTF8)
|
||||
highlightedNewContent, _ := highlight.Code(diffFile.Name, diffFile.Language, content)
|
||||
splitLines := strings.Split(string(highlightedNewContent), "\n")
|
||||
splitLines := splitHighlightLines([]byte(highlightedNewContent))
|
||||
lines := make(map[int]template.HTML, len(splitLines))
|
||||
// only save the highlighted lines we need, but not the whole file, to save memory
|
||||
for _, sec := range diffFile.Sections {
|
||||
|
||||
@ -5,6 +5,7 @@
|
||||
package gitdiff
|
||||
|
||||
import (
|
||||
"html/template"
|
||||
"strconv"
|
||||
"strings"
|
||||
"testing"
|
||||
@ -640,3 +641,41 @@ func TestNoCrashes(t *testing.T) {
|
||||
ParsePatch(t.Context(), setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")
|
||||
}
|
||||
}
|
||||
|
||||
func TestHighlightCodeLines(t *testing.T) {
|
||||
t.Run("CharsetDetecting", func(t *testing.T) {
|
||||
diffFile := &DiffFile{
|
||||
Name: "a.c",
|
||||
Language: "c",
|
||||
Sections: []*DiffSection{
|
||||
{
|
||||
Lines: []*DiffLine{{LeftIdx: 1}},
|
||||
},
|
||||
},
|
||||
}
|
||||
ret := highlightCodeLines(diffFile, true, []byte("// abc\xcc def\xcd")) // ISO-8859-1 bytes
|
||||
assert.Equal(t, "<span class=\"c1\">// abcÌ defÍ\n</span>", string(ret[0]))
|
||||
})
|
||||
|
||||
t.Run("LeftLines", func(t *testing.T) {
|
||||
diffFile := &DiffFile{
|
||||
Name: "a.c",
|
||||
Language: "c",
|
||||
Sections: []*DiffSection{
|
||||
{
|
||||
Lines: []*DiffLine{
|
||||
{LeftIdx: 1},
|
||||
{LeftIdx: 2},
|
||||
{LeftIdx: 3},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
const nl = "\n"
|
||||
ret := highlightCodeLines(diffFile, true, []byte("a\nb\n"))
|
||||
assert.Equal(t, map[int]template.HTML{
|
||||
0: `<span class="n">a</span>` + nl,
|
||||
1: `<span class="n">b</span>`,
|
||||
}, ret)
|
||||
})
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user