Add file tree to file view page (#32721)

Resolve #29328

This pull request introduces a file tree on the left side when reviewing
files of a repository.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

4 files changed, 64 insertions, 45 deletions

diff --git a/routers/web/repo/blame.go b/routers/web/repo/blame.go
index 2da5acd299..efd85b9452 100644
--- a/routers/web/repo/blame.go
+++ b/routers/web/repo/blame.go
@@ -41,60 +41,45 @@ type blameRow struct {
 
 // RefBlame render blame page
 func RefBlame(ctx *context.Context) {
-	fileName := ctx.Repo.TreePath
-	if len(fileName) == 0 {
+	ctx.Data["PageIsViewCode"] = true
+	ctx.Data["IsBlame"] = true
+
+	// Get current entry user currently looking at.
+	if ctx.Repo.TreePath == "" {
 		ctx.NotFound(nil)
 		return
 	}
-
-	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.RefTypeNameSubURL()
-	treeLink := branchLink
-	rawLink := ctx.Repo.RepoLink + "/raw/" + ctx.Repo.RefTypeNameSubURL()
-
-	if len(ctx.Repo.TreePath) > 0 {
-		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
-	}
-
-	var treeNames []string
-	paths := make([]string, 0, 5)
-	if len(ctx.Repo.TreePath) > 0 {
-		treeNames = strings.Split(ctx.Repo.TreePath, "/")
-		for i := range treeNames {
-			paths = append(paths, strings.Join(treeNames[:i+1], "/"))
-		}
-
-		ctx.Data["HasParentPath"] = true
-		if len(paths)-2 >= 0 {
-			ctx.Data["ParentPath"] = "/" + paths[len(paths)-1]
-		}
-	}
-
-	// Get current entry user currently looking at.
 	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
 	if err != nil {
 		HandleGitError(ctx, "Repo.Commit.GetTreeEntryByPath", err)
 		return
 	}
 
-	blob := entry.Blob()
+	treeNames := strings.Split(ctx.Repo.TreePath, "/")
+	var paths []string
+	for i := range treeNames {
+		paths = append(paths, strings.Join(treeNames[:i+1], "/"))
+	}
 
 	ctx.Data["Paths"] = paths
-	ctx.Data["TreeLink"] = treeLink
 	ctx.Data["TreeNames"] = treeNames
-	ctx.Data["BranchLink"] = branchLink
-
-	ctx.Data["RawFileLink"] = rawLink + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
-	ctx.Data["PageIsViewCode"] = true
-
-	ctx.Data["IsBlame"] = true
+	ctx.Data["BranchLink"] = ctx.Repo.RepoLink + "/src/" + ctx.Repo.RefTypeNameSubURL()
+	ctx.Data["RawFileLink"] = ctx.Repo.RepoLink + "/raw/" + ctx.Repo.RefTypeNameSubURL() + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
 
+	blob := entry.Blob()
 	fileSize := blob.Size()
 	ctx.Data["FileSize"] = fileSize
 	ctx.Data["FileName"] = blob.Name()
 
+	tplName := tplRepoViewContent
+	if !ctx.FormBool("only_content") {
+		prepareHomeTreeSideBarSwitch(ctx)
+		tplName = tplRepoView
+	}
+
 	if fileSize >= setting.UI.MaxDisplayFileSize {
 		ctx.Data["IsFileTooLarge"] = true
-		ctx.HTML(http.StatusOK, tplRepoHome)
+		ctx.HTML(http.StatusOK, tplName)
 		return
 	}
 
@@ -105,8 +90,7 @@ func RefBlame(ctx *context.Context) {
 	}
 
 	bypassBlameIgnore, _ := strconv.ParseBool(ctx.FormString("bypass-blame-ignore"))
-
-	result, err := performBlame(ctx, ctx.Repo.Repository, ctx.Repo.Commit, fileName, bypassBlameIgnore)
+	result, err := performBlame(ctx, ctx.Repo.Repository, ctx.Repo.Commit, ctx.Repo.TreePath, bypassBlameIgnore)
 	if err != nil {
 		ctx.NotFound(err)
 		return
@@ -122,7 +106,7 @@ func RefBlame(ctx *context.Context) {
 
 	renderBlame(ctx, result.Parts, commitNames)
 
-	ctx.HTML(http.StatusOK, tplRepoHome)
+	ctx.HTML(http.StatusOK, tplName)
 }
 
 type blameResult struct {
diff --git a/routers/web/repo/treelist.go b/routers/web/repo/treelist.go
index 9ce9f8424d..ab74741e61 100644
--- a/routers/web/repo/treelist.go
+++ b/routers/web/repo/treelist.go
@@ -11,6 +11,7 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/gitdiff"
+	files_service "code.gitea.io/gitea/services/repository/files"
 
 	"github.com/go-enry/go-enry/v2"
 )
@@ -84,3 +85,12 @@ func transformDiffTreeForUI(diffTree *gitdiff.DiffTree, filesViewedState map[str
 
 	return files
 }
+
+func TreeViewNodes(ctx *context.Context) {
+	results, err := files_service.GetTreeViewNodes(ctx, ctx.Repo.Commit, ctx.Repo.TreePath, ctx.FormString("sub_path"))
+	if err != nil {
+		ctx.ServerError("GetTreeViewNodes", err)
+		return
+	}
+	ctx.JSON(http.StatusOK, map[string]any{"fileTreeNodes": results})
+}
diff --git a/routers/web/repo/view.go b/routers/web/repo/view.go
index cb9c278cac..6ed5801d10 100644
--- a/routers/web/repo/view.go
+++ b/routers/web/repo/view.go
@@ -47,12 +47,14 @@ import (
 )
 
 const (
-	tplRepoEMPTY    templates.TplName = "repo/empty"
-	tplRepoHome     templates.TplName = "repo/home"
-	tplRepoViewList templates.TplName = "repo/view_list"
-	tplWatchers     templates.TplName = "repo/watchers"
-	tplForks        templates.TplName = "repo/forks"
-	tplMigrating    templates.TplName = "repo/migrate/migrating"
+	tplRepoEMPTY       templates.TplName = "repo/empty"
+	tplRepoHome        templates.TplName = "repo/home"
+	tplRepoView        templates.TplName = "repo/view"
+	tplRepoViewContent templates.TplName = "repo/view_content"
+	tplRepoViewList    templates.TplName = "repo/view_list"
+	tplWatchers        templates.TplName = "repo/watchers"
+	tplForks           templates.TplName = "repo/forks"
+	tplMigrating       templates.TplName = "repo/migrate/migrating"
 )
 
 type fileInfo struct {
diff --git a/routers/web/repo/view_home.go b/routers/web/repo/view_home.go
index 1da89686ad..d538406035 100644
--- a/routers/web/repo/view_home.go
+++ b/routers/web/repo/view_home.go
@@ -9,6 +9,7 @@ import (
 	"html/template"
 	"net/http"
 	"path"
+	"strconv"
 	"strings"
 	"time"
 
@@ -17,6 +18,7 @@ import (
 	access_model "code.gitea.io/gitea/models/perm/access"
 	repo_model "code.gitea.io/gitea/models/repo"
 	unit_model "code.gitea.io/gitea/models/unit"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	repo_module "code.gitea.io/gitea/modules/repository"
@@ -328,6 +330,19 @@ func handleRepoHomeFeed(ctx *context.Context) bool {
 	return true
 }
 
+func prepareHomeTreeSideBarSwitch(ctx *context.Context) {
+	showFileTree := true
+	if ctx.Doer != nil {
+		v, err := user_model.GetUserSetting(ctx, ctx.Doer.ID, user_model.SettingsKeyCodeViewShowFileTree, "true")
+		if err != nil {
+			log.Error("GetUserSetting: %v", err)
+		} else {
+			showFileTree, _ = strconv.ParseBool(v)
+		}
+	}
+	ctx.Data["UserSettingCodeViewShowFileTree"] = showFileTree
+}
+
 // Home render repository home page
 func Home(ctx *context.Context) {
 	if handleRepoHomeFeed(ctx) {
@@ -341,6 +356,8 @@ func Home(ctx *context.Context) {
 		return
 	}
 
+	prepareHomeTreeSideBarSwitch(ctx)
+
 	title := ctx.Repo.Repository.Owner.Name + "/" + ctx.Repo.Repository.Name
 	if len(ctx.Repo.Repository.Description) > 0 {
 		title += ": " + ctx.Repo.Repository.Description
@@ -410,7 +427,13 @@ func Home(ctx *context.Context) {
 		}
 	}
 
-	ctx.HTML(http.StatusOK, tplRepoHome)
+	if ctx.FormBool("only_content") {
+		ctx.HTML(http.StatusOK, tplRepoViewContent)
+	} else if len(treeNames) != 0 {
+		ctx.HTML(http.StatusOK, tplRepoView)
+	} else {
+		ctx.HTML(http.StatusOK, tplRepoHome)
+	}
 }
 
 func RedirectRepoTreeToSrc(ctx *context.Context) {