mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-23 12:59:11 -05:00
867f46f78e
* detect csv delimiter in csv rendering fixes #7868 * make linter happy * fix failing testcase & use ints where possible * expose markup type to template previously all markup had the .markdown class, which is incorrect, as it applies markdown CSS & JS logic to CSV rendering * fix build (missing `make css`) * ignore quoted csv content for delimiter scoring also fix html generation
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
// Copyright 2018 The Gitea 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 markup
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/csv"
|
|
"html"
|
|
"io"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/markup"
|
|
"code.gitea.io/gitea/modules/util"
|
|
)
|
|
|
|
var quoteRegexp = regexp.MustCompile(`["'][\s\S]+?["']`)
|
|
|
|
func init() {
|
|
markup.RegisterParser(Parser{})
|
|
|
|
}
|
|
|
|
// Parser implements markup.Parser for orgmode
|
|
type Parser struct {
|
|
}
|
|
|
|
// Name implements markup.Parser
|
|
func (Parser) Name() string {
|
|
return "csv"
|
|
}
|
|
|
|
// Extensions implements markup.Parser
|
|
func (Parser) Extensions() []string {
|
|
return []string{".csv", ".tsv"}
|
|
}
|
|
|
|
// Render implements markup.Parser
|
|
func (p Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
|
|
rd := csv.NewReader(bytes.NewReader(rawBytes))
|
|
rd.Comma = p.bestDelimiter(rawBytes)
|
|
var tmpBlock bytes.Buffer
|
|
tmpBlock.WriteString(`<table class="table">`)
|
|
for {
|
|
fields, err := rd.Read()
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
if err != nil {
|
|
continue
|
|
}
|
|
tmpBlock.WriteString("<tr>")
|
|
for _, field := range fields {
|
|
tmpBlock.WriteString("<td>")
|
|
tmpBlock.WriteString(html.EscapeString(field))
|
|
tmpBlock.WriteString("</td>")
|
|
}
|
|
tmpBlock.WriteString("</tr>")
|
|
}
|
|
tmpBlock.WriteString("</table>")
|
|
|
|
return tmpBlock.Bytes()
|
|
}
|
|
|
|
// bestDelimiter scores the input CSV data against delimiters, and returns the best match.
|
|
// Reads at most 10k bytes & 10 lines.
|
|
func (p Parser) bestDelimiter(data []byte) rune {
|
|
maxLines := 10
|
|
maxBytes := util.Min(len(data), 1e4)
|
|
text := string(data[:maxBytes])
|
|
text = quoteRegexp.ReplaceAllLiteralString(text, "")
|
|
lines := strings.SplitN(text, "\n", maxLines+1)
|
|
lines = lines[:util.Min(maxLines, len(lines))]
|
|
|
|
delimiters := []rune{',', ';', '\t', '|'}
|
|
bestDelim := delimiters[0]
|
|
bestScore := 0.0
|
|
for _, delim := range delimiters {
|
|
score := p.scoreDelimiter(lines, delim)
|
|
if score > bestScore {
|
|
bestScore = score
|
|
bestDelim = delim
|
|
}
|
|
}
|
|
|
|
return bestDelim
|
|
}
|
|
|
|
// scoreDelimiter uses a count & regularity metric to evaluate a delimiter against lines of CSV
|
|
func (Parser) scoreDelimiter(lines []string, delim rune) (score float64) {
|
|
countTotal := 0
|
|
countLineMax := 0
|
|
linesNotEqual := 0
|
|
|
|
for _, line := range lines {
|
|
if len(line) == 0 {
|
|
continue
|
|
}
|
|
|
|
countLine := strings.Count(line, string(delim))
|
|
countTotal += countLine
|
|
if countLine != countLineMax {
|
|
if countLineMax != 0 {
|
|
linesNotEqual++
|
|
}
|
|
countLineMax = util.Max(countLine, countLineMax)
|
|
}
|
|
}
|
|
|
|
return float64(countTotal) * (1 - float64(linesNotEqual)/float64(len(lines)))
|
|
}
|