324 lines
7.6 KiB
Go
324 lines
7.6 KiB
Go
// Copyright The Forgejo Authors.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"bufio"
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"bytes"
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"html/template"
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"regexp"
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"slices"
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"strconv"
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"strings"
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"code.gitea.io/gitea/modules/charset"
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"code.gitea.io/gitea/modules/highlight"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/translation"
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"golang.org/x/net/html"
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"golang.org/x/net/html/atom"
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)
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// filePreviewPattern matches "http://domain/org/repo/src/commit/COMMIT/filepath#L1-L2"
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var filePreviewPattern = regexp.MustCompile(`https?://((?:\S+/){3})src/commit/([0-9a-f]{4,64})/(\S+)#(L\d+(?:-L\d+)?)`)
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type FilePreview struct {
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fileContent []template.HTML
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subTitle template.HTML
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lineOffset int
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urlFull string
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filePath string
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start int
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end int
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isTruncated bool
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}
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func NewFilePreview(ctx *RenderContext, node *html.Node, locale translation.Locale) *FilePreview {
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if setting.FilePreviewMaxLines == 0 {
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// Feature is disabled
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return nil
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}
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preview := &FilePreview{}
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m := filePreviewPattern.FindStringSubmatchIndex(node.Data)
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if m == nil {
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return nil
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}
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// Ensure that every group has a match
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if slices.Contains(m, -1) {
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return nil
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}
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preview.urlFull = node.Data[m[0]:m[1]]
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// Ensure that we only use links to local repositories
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if !strings.HasPrefix(preview.urlFull, setting.AppURL+setting.AppSubURL) {
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return nil
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}
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projPath := strings.TrimSuffix(node.Data[m[2]:m[3]], "/")
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commitSha := node.Data[m[4]:m[5]]
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preview.filePath = node.Data[m[6]:m[7]]
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hash := node.Data[m[8]:m[9]]
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preview.start = m[0]
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preview.end = m[1]
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projPathSegments := strings.Split(projPath, "/")
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var language string
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fileBlob, err := DefaultProcessorHelper.GetRepoFileBlob(
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ctx.Ctx,
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projPathSegments[len(projPathSegments)-2],
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projPathSegments[len(projPathSegments)-1],
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commitSha, preview.filePath,
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&language,
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)
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if err != nil {
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return nil
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}
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lineSpecs := strings.Split(hash, "-")
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commitLinkBuffer := new(bytes.Buffer)
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err = html.Render(commitLinkBuffer, createLink(node.Data[m[0]:m[5]], commitSha[0:7], "text black"))
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if err != nil {
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log.Error("failed to render commitLink: %v", err)
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}
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var startLine, endLine int
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if len(lineSpecs) == 1 {
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startLine, _ = strconv.Atoi(strings.TrimPrefix(lineSpecs[0], "L"))
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endLine = startLine
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preview.subTitle = locale.Tr(
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"markup.filepreview.line", startLine,
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template.HTML(commitLinkBuffer.String()),
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)
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preview.lineOffset = startLine - 1
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} else {
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startLine, _ = strconv.Atoi(strings.TrimPrefix(lineSpecs[0], "L"))
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endLine, _ = strconv.Atoi(strings.TrimPrefix(lineSpecs[1], "L"))
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preview.subTitle = locale.Tr(
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"markup.filepreview.lines", startLine, endLine,
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template.HTML(commitLinkBuffer.String()),
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)
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preview.lineOffset = startLine - 1
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}
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lineCount := endLine - (startLine - 1)
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if startLine < 1 || endLine < 1 || lineCount < 1 {
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return nil
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}
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if setting.FilePreviewMaxLines > 0 && lineCount > setting.FilePreviewMaxLines {
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preview.isTruncated = true
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lineCount = setting.FilePreviewMaxLines
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}
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dataRc, err := fileBlob.DataAsync()
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if err != nil {
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return nil
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}
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defer dataRc.Close()
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reader := bufio.NewReader(dataRc)
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// skip all lines until we find our startLine
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for i := 1; i < startLine; i++ {
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_, err := reader.ReadBytes('\n')
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if err != nil {
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return nil
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}
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}
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// capture the lines we're interested in
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lineBuffer := new(bytes.Buffer)
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for i := 0; i < lineCount; i++ {
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buf, err := reader.ReadBytes('\n')
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if err != nil {
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break
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}
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lineBuffer.Write(buf)
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}
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// highlight the file...
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fileContent, _, err := highlight.File(fileBlob.Name(), language, lineBuffer.Bytes())
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if err != nil {
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log.Error("highlight.File failed, fallback to plain text: %v", err)
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fileContent = highlight.PlainText(lineBuffer.Bytes())
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}
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preview.fileContent = fileContent
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return preview
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}
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func (p *FilePreview) CreateHTML(locale translation.Locale) *html.Node {
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table := &html.Node{
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Type: html.ElementNode,
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Data: atom.Table.String(),
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Attr: []html.Attribute{{Key: "class", Val: "file-preview"}},
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}
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tbody := &html.Node{
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Type: html.ElementNode,
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Data: atom.Tbody.String(),
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}
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status := &charset.EscapeStatus{}
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statuses := make([]*charset.EscapeStatus, len(p.fileContent))
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for i, line := range p.fileContent {
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statuses[i], p.fileContent[i] = charset.EscapeControlHTML(line, locale, charset.FileviewContext)
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status = status.Or(statuses[i])
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}
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for idx, code := range p.fileContent {
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tr := &html.Node{
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Type: html.ElementNode,
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Data: atom.Tr.String(),
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}
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lineNum := strconv.Itoa(p.lineOffset + idx + 1)
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tdLinesnum := &html.Node{
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Type: html.ElementNode,
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Data: atom.Td.String(),
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Attr: []html.Attribute{
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{Key: "class", Val: "lines-num"},
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},
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}
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spanLinesNum := &html.Node{
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Type: html.ElementNode,
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Data: atom.Span.String(),
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Attr: []html.Attribute{
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{Key: "data-line-number", Val: lineNum},
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},
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}
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tdLinesnum.AppendChild(spanLinesNum)
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tr.AppendChild(tdLinesnum)
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if status.Escaped {
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tdLinesEscape := &html.Node{
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Type: html.ElementNode,
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Data: atom.Td.String(),
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Attr: []html.Attribute{
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{Key: "class", Val: "lines-escape"},
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},
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}
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if statuses[idx].Escaped {
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btnTitle := ""
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if statuses[idx].HasInvisible {
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btnTitle += locale.TrString("repo.invisible_runes_line") + " "
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}
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if statuses[idx].HasAmbiguous {
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btnTitle += locale.TrString("repo.ambiguous_runes_line")
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}
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escapeBtn := &html.Node{
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Type: html.ElementNode,
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Data: atom.Button.String(),
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Attr: []html.Attribute{
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{Key: "class", Val: "toggle-escape-button btn interact-bg"},
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{Key: "title", Val: btnTitle},
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},
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}
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tdLinesEscape.AppendChild(escapeBtn)
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}
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tr.AppendChild(tdLinesEscape)
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}
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tdCode := &html.Node{
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Type: html.ElementNode,
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Data: atom.Td.String(),
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Attr: []html.Attribute{
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{Key: "class", Val: "lines-code chroma"},
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},
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}
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codeInner := &html.Node{
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Type: html.ElementNode,
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Data: atom.Code.String(),
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Attr: []html.Attribute{{Key: "class", Val: "code-inner"}},
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}
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codeText := &html.Node{
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Type: html.RawNode,
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Data: string(code),
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}
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codeInner.AppendChild(codeText)
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tdCode.AppendChild(codeInner)
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tr.AppendChild(tdCode)
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tbody.AppendChild(tr)
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}
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table.AppendChild(tbody)
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twrapper := &html.Node{
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Type: html.ElementNode,
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Data: atom.Div.String(),
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Attr: []html.Attribute{{Key: "class", Val: "ui table"}},
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}
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twrapper.AppendChild(table)
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header := &html.Node{
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Type: html.ElementNode,
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Data: atom.Div.String(),
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Attr: []html.Attribute{{Key: "class", Val: "header"}},
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}
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afilepath := &html.Node{
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Type: html.ElementNode,
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Data: atom.A.String(),
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Attr: []html.Attribute{
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{Key: "href", Val: p.urlFull},
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{Key: "class", Val: "muted"},
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},
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}
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afilepath.AppendChild(&html.Node{
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Type: html.TextNode,
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Data: p.filePath,
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})
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header.AppendChild(afilepath)
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psubtitle := &html.Node{
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Type: html.ElementNode,
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Data: atom.Span.String(),
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Attr: []html.Attribute{{Key: "class", Val: "text small grey"}},
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}
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psubtitle.AppendChild(&html.Node{
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Type: html.RawNode,
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Data: string(p.subTitle),
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})
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header.AppendChild(psubtitle)
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node := &html.Node{
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Type: html.ElementNode,
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Data: atom.Div.String(),
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Attr: []html.Attribute{{Key: "class", Val: "file-preview-box"}},
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}
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node.AppendChild(header)
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if p.isTruncated {
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warning := &html.Node{
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Type: html.ElementNode,
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Data: atom.Div.String(),
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Attr: []html.Attribute{{Key: "class", Val: "ui warning message tw-text-left"}},
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}
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warning.AppendChild(&html.Node{
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Type: html.TextNode,
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Data: locale.TrString("markup.filepreview.truncated"),
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})
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node.AppendChild(warning)
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}
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node.AppendChild(twrapper)
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return node
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}
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