1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

package cutil

import (
	"fmt"
	h "html"
	"strings"

	"github.com/alecthomas/chroma"
	"github.com/alecthomas/chroma/formatters/html"
	"github.com/alecthomas/chroma/lexers"
	"github.com/alecthomas/chroma/styles"
	"github.com/pkg/errors"

	"{{{ .Package }}}/app/util"
)

var (
	lineNums   *html.Formatter
	noLineNums *html.Formatter
)

func FormatJSON(v any) (string, error) {
	return FormatLang(util.ToJSON(v), "json")
}

func FormatLang(content string, lang string) (string, error) {
	l := lexers.Get(lang)
	return FormatString(content, l)
}{{{ if .HasModule "migration" }}}

func FormatLangIgnoreErrors(content string, lang string) string {
	ret, err := FormatLang(content, lang)
	if err != nil {
		return fmt.Sprintf("encoding error: %s\n%s", err.Error(), content)
	}
	return ret
}{{{ end }}}

func FormatFilename(content string, filename string) (string, error) {
	l := lexers.Match(filename)
	if l == nil {
		l = lexers.Fallback
	}
	return FormatString(content, l)
}

func FormatString(content string, l chroma.Lexer) (string, error) {
	if l == nil {
		return "", errors.New("no lexer available for this content")
	}
	s := styles.MonokaiLight
	var f *html.Formatter
	if strings.Contains(content, "\n") {
		if lineNums == nil {
			lineNums = html.New(html.WithClasses(true), html.WithLineNumbers(true), html.LineNumbersInTable(true))
		}
		f = lineNums
	} else {
		if noLineNums == nil {
			noLineNums = html.New(html.WithClasses(true))
		}
		f = noLineNums
	}
	i, err := l.Tokenise(nil, content)
	if err != nil {
		return "", errors.Wrap(err, "can't tokenize")
	}
	x := &strings.Builder{}
	err = f.Format(x, s, i)
	if err != nil {
		return "", errors.Wrap(err, "can't format")
	}

	ret := x.String()
	ret = strings.ReplaceAll(ret, "\n</span>", "<br /></span>")
	ret = strings.ReplaceAll(ret, "</span>\n", "</span><br />")
	ret = strings.ReplaceAll(ret, "\n<span", "<br /><span")
	ret = strings.ReplaceAll(ret, ">\n", ">")
	if l.Config().Name == "SQL" {
		ret = strings.ReplaceAll(ret, `<span class="err">$</span>`, `<span class="mi">$</span>`)
	}
	ret = strings.Replace(ret, `<td class="lntd"><pre tabindex="0" class="chroma"><span class="lnt">1<br /></span></pre></td>`, "", 1)
	return ret, nil
}

func FormatMarkdown(s string) (string, error) {
	match, end := "<pre><code class=\"language-", "</code></pre>"
	idx := strings.Index(s, match)
	for idx > -1 {
		startQuote := idx + len(match)
		endQuote := strings.Index(s[startQuote:], "\"")
		lang := s[startQuote : startQuote+endQuote]
		if lang == "shell" {
			lang = "bash"
		}
		contentStart := startQuote + endQuote + 2
		contentEnd := strings.Index(s[startQuote:], end) + startQuote
		content := s[contentStart:contentEnd]
		content = h.UnescapeString(content)
		code, err := FormatLang(content, lang)
		if err != nil {
			return "", err
		}
		s = s[:idx] + code + s[contentEnd+len(end):]
		idx = strings.Index(s, match)
	}
	return s, nil
}

func FormatCleanMarkup(s string, icon string) (string, string, error) {
	ret, err := FormatMarkdown(s)
	if err != nil {
		return "", "", err
	}
	title := ""
	if h1Idx := strings.Index(ret, "<h1>"); h1Idx > -1 {
		if h1EndIdx := strings.Index(ret, "</h1>"); h1EndIdx > -1 {
			title = s[h1Idx+4 : h1EndIdx]
		}
		ic := fmt.Sprintf(`<svg class="icon" style="width: 20px; height: 20px;"><use xlink:href="#svg-%s" /></svg> `, icon)
		ret = ret[:h1Idx+4] + ic + ret[h1Idx+4:]
		ret = strings.ReplaceAll(ret, "<h3>", "<h4>")
		ret = strings.ReplaceAll(ret, "</h3>", "</h4>")
		ret = strings.ReplaceAll(ret, "<h2>", "<h4>")
		ret = strings.ReplaceAll(ret, "</h2>", "</h4>")
		ret = strings.ReplaceAll(ret, "<h1>", "<h3 style=\"margin-top: 0;\">")
		ret = strings.ReplaceAll(ret, "</h1>", "</h3>")
		ret = strings.ReplaceAll(ret, "<a href=\"http", "<a target=\"_blank\" rel=\"noopener noreferrer\" href=\"http")
	}
	return title, ret, nil
}