Render inline file permalinks

services/markup/processorhelper.go

@@ -5,10 +5,21 @@ package markup
 
 import (
 	"context"
+	"fmt"
+	"html/template"
+	"io"
 
+	"code.gitea.io/gitea/models/perm/access"
+	"code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/gitrepo"
+	"code.gitea.io/gitea/modules/highlight"
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/translation"
 	gitea_context "code.gitea.io/gitea/services/context"
+	file_service "code.gitea.io/gitea/services/repository/files"
 )
 
 func ProcessorHelper() *markup.ProcessorHelper {
@@ -29,5 +40,75 @@ func ProcessorHelper() *markup.ProcessorHelper {
 			// when using gitea context (web context), use user's visibility and user's permission to check
 			return user.IsUserVisibleToViewer(giteaCtx, mentionedUser, giteaCtx.Doer)
 		},
+		GetRepoFileContent: func(ctx context.Context, ownerName, repoName, commitSha, filePath string) ([]template.HTML, error) {
+			repo, err := repo.GetRepositoryByOwnerAndName(ctx, ownerName, repoName)
+			if err != nil {
+				return nil, err
+			}
+
+			var user *user.User
+
+			giteaCtx, ok := ctx.(*gitea_context.Context)
+			if ok {
+				user = giteaCtx.Doer
+			}
+
+			perms, err := access.GetUserRepoPermission(ctx, repo, user)
+			if err != nil {
+				return nil, err
+			}
+			if !perms.CanRead(unit.TypeCode) {
+				return nil, fmt.Errorf("cannot access repository code")
+			}
+
+			gitRepo, err := gitrepo.OpenRepository(ctx, repo)
+			if err != nil {
+				return nil, err
+			}
+
+			commit, err := gitRepo.GetCommit(commitSha)
+			if err != nil {
+				return nil, err
+			}
+
+			language, err := file_service.TryGetContentLanguage(gitRepo, commitSha, filePath)
+			if err != nil {
+				log.Error("Unable to get file language for %-v:%s. Error: %v", repo, filePath, err)
+			}
+
+			blob, err := commit.GetBlobByPath(filePath)
+			if err != nil {
+				return nil, err
+			}
+
+			dataRc, err := blob.DataAsync()
+			if err != nil {
+				return nil, err
+			}
+			defer dataRc.Close()
+
+			buf, _ := io.ReadAll(dataRc)
+
+			fileContent, _, err := highlight.File(blob.Name(), language, buf)
+			if err != nil {
+				log.Error("highlight.File failed, fallback to plain text: %v", err)
+				fileContent = highlight.PlainText(buf)
+			}
+
+			return fileContent, nil
+		},
+		GetLocale: func(ctx context.Context) (translation.Locale, error) {
+			giteaCtx, ok := ctx.(*gitea_context.Context)
+			if ok {
+				return giteaCtx.Locale, nil
+			}
+
+			giteaBaseCtx, ok := ctx.(*gitea_context.Base)
+			if ok {
+				return giteaBaseCtx.Locale, nil
+			}
+
+			return nil, fmt.Errorf("could not retrieve locale from context")
+		},
 	}
 }