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authorPřemysl Eric Janouch <p@janouch.name>2020-08-15 04:21:56 +0200
committerPřemysl Eric Janouch <p@janouch.name>2020-08-15 04:26:50 +0200
commit3a5cc216bb6d497b28103d19b8471b5a89498cf9 (patch)
treea9dde1c590ceab784f0796da96fafa9ab4775167 /hasp
parenta049249d8163a3ea02fb1c91cceaf2d1c6700f30 (diff)
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hswg: merge in hasp as a mode
No need to have the two-line header processor in two places.
Diffstat (limited to 'hasp')
-rw-r--r--hasp/main.go91
1 files changed, 0 insertions, 91 deletions
diff --git a/hasp/main.go b/hasp/main.go
deleted file mode 100644
index dd2ba7a..0000000
--- a/hasp/main.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Program hasp is a preprocessor for libasciidoc to make it understand
-// two-line/underlined titles, intended to be used in Gitea.
-package main
-
-import (
- "bytes"
- "encoding/xml"
- "io"
- "io/ioutil"
- "os"
- "strings"
- "unicode"
- "unicode/utf8"
-
- "github.com/bytesparadise/libasciidoc"
- "github.com/bytesparadise/libasciidoc/pkg/configuration"
-)
-
-// isTitle returns the title level if the lines seem to form a title,
-// zero otherwise. Input lines may inclide trailing newlines.
-func isTitle(line1, line2 []byte) int {
- // This is a very naïve method, we should target graphemes (thus at least
- // NFC normalize the lines first) and account for wide characters.
- diff := utf8.RuneCount(line1) - utf8.RuneCount(line2)
- if len(line2) < 2 || diff < -1 || diff > 1 {
- return 0
- }
-
- // "Don't be fooled by back-to-back delimited blocks."
- // Still gets fooled by other things, though.
- if bytes.IndexFunc(line1, func(r rune) bool {
- return unicode.IsLetter(r) || unicode.IsNumber(r)
- }) < 0 {
- return 0
- }
-
- // The underline must be homogenous.
- for _, r := range bytes.TrimRight(line2, "\r\n") {
- if r != line2[0] {
- return 0
- }
- }
- return 1 + strings.IndexByte("=-~^+", line2[0])
-}
-
-func writeLine(w *io.PipeWriter, cur, next []byte) []byte {
- if level := isTitle(cur, next); level > 0 {
- w.Write(append(bytes.Repeat([]byte{'='}, level), ' '))
- next = nil
- }
- w.Write(cur)
- return next
-}
-
-// ConvertTitles converts AsciiDoc two-line (underlined) titles to single-line.
-func ConvertTitles(w *io.PipeWriter, input []byte) {
- var last []byte
- for _, cur := range bytes.SplitAfter(input, []byte{'\n'}) {
- last = writeLine(w, last, cur)
- }
- writeLine(w, last, nil)
-}
-
-func main() {
- input, err := ioutil.ReadAll(os.Stdin)
- if err != nil {
- panic(err)
- }
-
- pr, pw := io.Pipe()
- go func() {
- defer pw.Close()
- ConvertTitles(pw, input)
- }()
-
- // io.Copy(os.Stdout, pr)
- // return
-
- config := configuration.NewConfiguration(
- configuration.WithHeaderFooter(true))
- _, err = libasciidoc.ConvertToHTML(pr, os.Stdout, config)
- if err != nil {
- // Fallback: output all the text sanitized for direct inclusion.
- os.Stdout.WriteString("<pre>")
- for _, line := range bytes.Split(input, []byte{'\n'}) {
- xml.EscapeText(os.Stdout, line)
- os.Stdout.WriteString("\n")
- }
- os.Stdout.WriteString("</pre>")
- }
-}