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// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"bufio"
"context"
"fmt"
"html/template"
"strings"
"code.gitea.io/gitea/models/perm/access"
"code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/models/unit"
"code.gitea.io/gitea/modules/charset"
"code.gitea.io/gitea/modules/gitrepo"
"code.gitea.io/gitea/modules/indexer/code"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
gitea_context "code.gitea.io/gitea/services/context"
"code.gitea.io/gitea/services/repository/files"
)
func renderRepoFileCodePreview(ctx context.Context, opts markup.RenderCodePreviewOptions) (template.HTML, error) {
opts.LineStop = max(opts.LineStop, opts.LineStart)
lineCount := opts.LineStop - opts.LineStart + 1
if lineCount <= 0 || lineCount > 140 /* GitHub at most show 140 lines */ {
lineCount = 10
opts.LineStop = opts.LineStart + lineCount
}
dbRepo, err := repo.GetRepositoryByOwnerAndName(ctx, opts.OwnerName, opts.RepoName)
if err != nil {
return "", err
}
webCtx, ok := ctx.Value(gitea_context.WebContextKey).(*gitea_context.Context)
if !ok {
return "", fmt.Errorf("context is not a web context")
}
doer := webCtx.Doer
perms, err := access.GetUserRepoPermission(ctx, dbRepo, doer)
if err != nil {
return "", err
}
if !perms.CanRead(unit.TypeCode) {
return "", util.ErrPermissionDenied
}
gitRepo, err := gitrepo.OpenRepository(ctx, dbRepo)
if err != nil {
return "", err
}
defer gitRepo.Close()
commit, err := gitRepo.GetCommit(opts.CommitID)
if err != nil {
return "", err
}
language, _ := files.TryGetContentLanguage(gitRepo, opts.CommitID, opts.FilePath)
blob, err := commit.GetBlobByPath(opts.FilePath)
if err != nil {
return "", err
}
if blob.Size() > setting.UI.MaxDisplayFileSize {
return "", fmt.Errorf("file is too large")
}
dataRc, err := blob.DataAsync()
if err != nil {
return "", err
}
defer dataRc.Close()
reader := bufio.NewReader(dataRc)
for i := 1; i < opts.LineStart; i++ {
if _, err = reader.ReadBytes('\n'); err != nil {
return "", err
}
}
lineNums := make([]int, 0, lineCount)
lineCodes := make([]string, 0, lineCount)
for i := opts.LineStart; i <= opts.LineStop; i++ {
line, err := reader.ReadString('\n')
if err != nil && line == "" {
break
}
lineNums = append(lineNums, i)
lineCodes = append(lineCodes, line)
}
realLineStop := max(opts.LineStart, opts.LineStart+len(lineNums)-1)
highlightLines := code.HighlightSearchResultCode(opts.FilePath, language, lineNums, strings.Join(lineCodes, ""))
escapeStatus := &charset.EscapeStatus{}
lineEscapeStatus := make([]*charset.EscapeStatus, len(highlightLines))
for i, hl := range highlightLines {
lineEscapeStatus[i], hl.FormattedContent = charset.EscapeControlHTML(hl.FormattedContent, webCtx.Base.Locale, charset.RuneNBSP)
escapeStatus = escapeStatus.Or(lineEscapeStatus[i])
}
return webCtx.RenderToHTML("base/markup_codepreview", map[string]any{
"FullURL": opts.FullURL,
"FilePath": opts.FilePath,
"LineStart": opts.LineStart,
"LineStop": realLineStop,
"RepoLink": dbRepo.Link(),
"CommitID": opts.CommitID,
"HighlightLines": highlightLines,
"EscapeStatus": escapeStatus,
"LineEscapeStatus": lineEscapeStatus,
})
}
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