mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-26 09:09:36 -05:00
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package base
|
|
|
|
import (
|
|
"bytes"
|
|
"path"
|
|
|
|
"github.com/gogits/gfm"
|
|
)
|
|
|
|
func isletter(c byte) bool {
|
|
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
|
|
}
|
|
|
|
func isalnum(c byte) bool {
|
|
return (c >= '0' && c <= '9') || isletter(c)
|
|
}
|
|
|
|
var validLinks = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"), []byte("mailto://")}
|
|
|
|
func isLink(link []byte) bool {
|
|
for _, prefix := range validLinks {
|
|
if len(link) > len(prefix) && bytes.Equal(bytes.ToLower(link[:len(prefix)]), prefix) && isalnum(link[len(prefix)]) {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
type CustomRender struct {
|
|
gfm.Renderer
|
|
urlPrefix string
|
|
}
|
|
|
|
func (options *CustomRender) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
|
|
if len(link) > 0 && !isLink(link) {
|
|
if link[0] == '#' {
|
|
link = append([]byte(options.urlPrefix), link...)
|
|
} else {
|
|
link = []byte(path.Join(options.urlPrefix, string(link)))
|
|
}
|
|
}
|
|
|
|
options.Renderer.Link(out, link, title, content)
|
|
}
|
|
|
|
func RenderMarkdown(rawBytes []byte, urlPrefix string) []byte {
|
|
htmlFlags := 0
|
|
htmlFlags |= gfm.HTML_USE_XHTML
|
|
// htmlFlags |= gfm.HTML_USE_SMARTYPANTS
|
|
// htmlFlags |= gfm.HTML_SMARTYPANTS_FRACTIONS
|
|
// htmlFlags |= gfm.HTML_SMARTYPANTS_LATEX_DASHES
|
|
htmlFlags |= gfm.HTML_SKIP_HTML
|
|
htmlFlags |= gfm.HTML_SKIP_STYLE
|
|
htmlFlags |= gfm.HTML_SKIP_SCRIPT
|
|
htmlFlags |= gfm.HTML_GITHUB_BLOCKCODE
|
|
htmlFlags |= gfm.HTML_OMIT_CONTENTS
|
|
htmlFlags |= gfm.HTML_COMPLETE_PAGE
|
|
renderer := &CustomRender{
|
|
Renderer: gfm.HtmlRenderer(htmlFlags, "", ""),
|
|
urlPrefix: urlPrefix,
|
|
}
|
|
|
|
// set up the parser
|
|
extensions := 0
|
|
extensions |= gfm.EXTENSION_NO_INTRA_EMPHASIS
|
|
extensions |= gfm.EXTENSION_TABLES
|
|
extensions |= gfm.EXTENSION_FENCED_CODE
|
|
extensions |= gfm.EXTENSION_AUTOLINK
|
|
extensions |= gfm.EXTENSION_STRIKETHROUGH
|
|
extensions |= gfm.EXTENSION_HARD_LINE_BREAK
|
|
extensions |= gfm.EXTENSION_SPACE_HEADERS
|
|
extensions |= gfm.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
|
|
|
|
body := gfm.Markdown(rawBytes, renderer, extensions)
|
|
|
|
return body
|
|
}
|