Fix incorrect file links (#34189)

Fix #34188

The name "FileName" is ambiguous: sometimes it is "base name without
path", sometimes it is "full name with path".

The ambiguous name causes various problems.

This PR clarifies the usage: `FileTreePath`: the full name with path.

routers/web/repo/blame.go

@@ -8,6 +8,7 @@ import (
 	gotemplate "html/template"
 	"net/http"
 	"net/url"
+	"path"
 	"strconv"
 	"strings"
 
@@ -69,7 +70,7 @@ func RefBlame(ctx *context.Context) {
 	blob := entry.Blob()
 	fileSize := blob.Size()
 	ctx.Data["FileSize"] = fileSize
-	ctx.Data["FileName"] = blob.Name()
+	ctx.Data["FileTreePath"] = ctx.Repo.TreePath
 
 	tplName := tplRepoViewContent
 	if !ctx.FormBool("only_content") {
@@ -285,8 +286,7 @@ func renderBlame(ctx *context.Context, blameParts []*git.BlamePart, commitNames
 			if i != len(lines)-1 {
 				line += "\n"
 			}
-			fileName := fmt.Sprintf("%v", ctx.Data["FileName"])
-			line, lexerNameForLine := highlight.Code(fileName, language, line)
+			line, lexerNameForLine := highlight.Code(path.Base(ctx.Repo.TreePath), language, line)
 
 			// set lexer name to the first detected lexer. this is certainly suboptimal and
 			// we should instead highlight the whole file at once

routers/web/repo/commit.go

@@ -215,13 +215,12 @@ func SearchCommits(ctx *context.Context) {
 
 // FileHistory show a file's reversions
 func FileHistory(ctx *context.Context) {
-	fileName := ctx.Repo.TreePath
-	if len(fileName) == 0 {
+	if ctx.Repo.TreePath == "" {
 		Commits(ctx)
 		return
 	}
 
-	commitsCount, err := ctx.Repo.GitRepo.FileCommitsCount(ctx.Repo.RefFullName.ShortName(), fileName) // FIXME: legacy code used ShortName
+	commitsCount, err := ctx.Repo.GitRepo.FileCommitsCount(ctx.Repo.RefFullName.ShortName(), ctx.Repo.TreePath)
 	if err != nil {
 		ctx.ServerError("FileCommitsCount", err)
 		return
@@ -238,7 +237,7 @@ func FileHistory(ctx *context.Context) {
 	commits, err := ctx.Repo.GitRepo.CommitsByFileAndRange(
 		git.CommitsByFileAndRangeOptions{
 			Revision: ctx.Repo.RefFullName.ShortName(), // FIXME: legacy code used ShortName
-			File:     fileName,
+			File:     ctx.Repo.TreePath,
 			Page:     page,
 		})
 	if err != nil {
@@ -253,7 +252,7 @@ func FileHistory(ctx *context.Context) {
 
 	ctx.Data["Username"] = ctx.Repo.Owner.Name
 	ctx.Data["Reponame"] = ctx.Repo.Repository.Name
-	ctx.Data["FileName"] = fileName
+	ctx.Data["FileTreePath"] = ctx.Repo.TreePath
 	ctx.Data["CommitCount"] = commitsCount
 
 	pager := context.NewPagination(int(commitsCount), setting.Git.CommitsRangeSize, page, 5)

routers/web/repo/editor.go

@@ -160,7 +160,6 @@ func editFile(ctx *context.Context, isNewFile bool) {
 		defer dataRc.Close()
 
 		ctx.Data["FileSize"] = blob.Size()
-		ctx.Data["FileName"] = blob.Name()
 
 		buf := make([]byte, 1024)
 		n, _ := util.ReadAtMost(dataRc, buf)

routers/web/repo/view_file.go

@@ -52,7 +52,7 @@ func prepareToRenderFile(ctx *context.Context, entry *git.TreeEntry) {
 
 	ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+path.Base(ctx.Repo.TreePath), ctx.Repo.RefFullName.ShortName())
 	ctx.Data["FileIsSymlink"] = entry.IsLink()
-	ctx.Data["FileName"] = blob.Name()
+	ctx.Data["FileTreePath"] = ctx.Repo.TreePath
 	ctx.Data["RawFileLink"] = ctx.Repo.RepoLink + "/raw/" + ctx.Repo.RefTypeNameSubURL() + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
 
 	if ctx.Repo.TreePath == ".editorconfig" {

routers/web/repo/view_readme.go

@@ -162,7 +162,7 @@ func prepareToRenderReadmeFile(ctx *context.Context, subfolder string, readmeFil
 	defer dataRc.Close()
 
 	ctx.Data["FileIsText"] = fInfo.isTextFile
-	ctx.Data["FileName"] = path.Join(subfolder, readmeFile.Name())
+	ctx.Data["FileTreePath"] = path.Join(subfolder, readmeFile.Name())
 	ctx.Data["FileSize"] = fInfo.fileSize
 	ctx.Data["IsLFSFile"] = fInfo.isLFSFile