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Detect delimiter in CSV rendering (#7869)

* 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
pull/7893/head
Norwin 1 month ago
parent
commit
867f46f78e

+ 58
- 3
modules/markup/csv/csv.go View File

@@ -9,12 +9,18 @@ import (
"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
@@ -28,12 +34,13 @@ func (Parser) Name() string {

// Extensions implements markup.Parser
func (Parser) Extensions() []string {
return []string{".csv"}
return []string{".csv", ".tsv"}
}

// Render implements markup.Parser
func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
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 {
@@ -50,9 +57,57 @@ func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string,
tmpBlock.WriteString(html.EscapeString(field))
tmpBlock.WriteString("</td>")
}
tmpBlock.WriteString("<tr>")
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)))
}

+ 8
- 3
modules/markup/csv/csv_test.go View File

@@ -13,9 +13,14 @@ import (
func TestRenderCSV(t *testing.T) {
var parser Parser
var kases = map[string]string{
"a": "<table class=\"table\"><tr><td>a</td><tr></table>",
"1,2": "<table class=\"table\"><tr><td>1</td><td>2</td><tr></table>",
"<br/>": "<table class=\"table\"><tr><td>&lt;br/&gt;</td><tr></table>",
"a": "<table class=\"table\"><tr><td>a</td></tr></table>",
"1,2": "<table class=\"table\"><tr><td>1</td><td>2</td></tr></table>",
"1;2": "<table class=\"table\"><tr><td>1</td><td>2</td></tr></table>",
"1\t2": "<table class=\"table\"><tr><td>1</td><td>2</td></tr></table>",
"1|2": "<table class=\"table\"><tr><td>1</td><td>2</td></tr></table>",
"1,2,3;4,5,6;7,8,9\na;b;c": "<table class=\"table\"><tr><td>1,2,3</td><td>4,5,6</td><td>7,8,9</td></tr><tr><td>a</td><td>b</td><td>c</td></tr></table>",
"\"1,2,3,4\";\"a\nb\"\nc;d": "<table class=\"table\"><tr><td>1,2,3,4</td><td>a\nb</td></tr><tr><td>c</td><td>d</td></tr></table>",
"<br/>": "<table class=\"table\"><tr><td>&lt;br/&gt;</td></tr></table>",
}

for k, v := range kases {

+ 1
- 0
public/css/index.css View File

@@ -489,6 +489,7 @@ footer .ui.left,footer .ui.right{line-height:40px}
.repository.file.list .non-diff-file-content .view-raw img{padding:5px 5px 0 5px}
.repository.file.list .non-diff-file-content .plain-text{padding:1em 2em 1em 2em}
.repository.file.list .non-diff-file-content .plain-text pre{word-break:break-word;white-space:pre-wrap}
.repository.file.list .non-diff-file-content .csv{overflow-x:auto}
.repository.file.list .non-diff-file-content pre{overflow:auto}
.repository.file.list .sidebar{padding-left:0}
.repository.file.list .sidebar .octicon{width:16px}

+ 4
- 0
public/less/_repository.less View File

@@ -400,6 +400,10 @@
}
}

.csv {
overflow-x: auto;
}

pre {
overflow: auto;
}

+ 4
- 2
routers/repo/view.go View File

@@ -162,8 +162,9 @@ func renderDirectory(ctx *context.Context, treeLink string) {
d, _ := ioutil.ReadAll(dataRc)
buf = charset.ToUTF8WithFallback(append(buf, d...))

if markup.Type(readmeFile.Name()) != "" {
if markupType := markup.Type(readmeFile.Name()); markupType != "" {
ctx.Data["IsMarkup"] = true
ctx.Data["MarkupType"] = string(markupType)
ctx.Data["FileContent"] = string(markup.Render(readmeFile.Name(), buf, treeLink, ctx.Repo.Repository.ComposeMetas()))
} else {
ctx.Data["IsRenderedHTML"] = true
@@ -282,8 +283,9 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st

readmeExist := markup.IsReadmeFile(blob.Name())
ctx.Data["ReadmeExist"] = readmeExist
if markup.Type(blob.Name()) != "" {
if markupType := markup.Type(blob.Name()); markupType != "" {
ctx.Data["IsMarkup"] = true
ctx.Data["MarkupType"] = markupType
ctx.Data["FileContent"] = string(markup.Render(blob.Name(), buf, path.Dir(treeLink), ctx.Repo.Repository.ComposeMetas()))
} else if readmeExist {
ctx.Data["IsRenderedHTML"] = true

+ 1
- 1
templates/repo/view_file.tmpl View File

@@ -45,7 +45,7 @@
</div>
</h4>
<div class="ui attached table unstackable segment">
<div class="file-view {{if .IsMarkup}}markdown{{else if .IsRenderedHTML}}plain-text{{else if .IsTextFile}}code-view{{end}} has-emoji">
<div class="file-view {{if .IsMarkup}}{{.MarkupType}}{{else if .IsRenderedHTML}}plain-text{{else if .IsTextFile}}code-view{{end}} has-emoji">
{{if .IsMarkup}}
{{if .FileContent}}{{.FileContent | Safe}}{{end}}
{{else if .IsRenderedHTML}}

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