Fix adding of empty class name (#23352) (#23360)

Backport #23352

This PR is to fix the error shown below. The reason is because
[`class-name`
prop](https://github.com/go-gitea/gitea/blob/main/web_src/js/components/ActionRunStatus.vue#L6)
given to `svg` component has a space, and classList cannot add empty
string.



https://user-images.githubusercontent.com/17645053/223346720-c7f9de43-5e69-4ecf-93c0-90bf04090693.mov

Co-authored-by: Hester Gong <hestergong@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

cmd/convert.go

@@ -35,7 +35,7 @@ func runConvert(ctx *cli.Context) error {
 	log.Info("Log path: %s", setting.Log.RootPath)
 	log.Info("Configuration file: %s", setting.CustomConf)
 
-	if !setting.Database.UseMySQL {
+	if !setting.Database.Type.IsMySQL() {
 		fmt.Println("This command can only be used with a MySQL database")
 		return nil
 	}

cmd/dump.go

@@ -279,7 +279,7 @@ func runDump(ctx *cli.Context) error {
 	}()
 
 	targetDBType := ctx.String("database")
-	if len(targetDBType) > 0 && targetDBType != setting.Database.Type {
+	if len(targetDBType) > 0 && targetDBType != setting.Database.Type.String() {
 		log.Info("Dumping database %s => %s...", setting.Database.Type, targetDBType)
 	} else {
 		log.Info("Dumping database...")

models/activities/action.go

@@ -99,7 +99,7 @@ func (a *Action) TableIndices() []*schemas.Index {
 	actUserIndex.AddColumn("act_user_id", "repo_id", "created_unix", "user_id", "is_deleted")
 
 	indices := []*schemas.Index{actUserIndex, repoIndex}
-	if setting.Database.UsePostgreSQL {
+	if setting.Database.Type.IsPostgreSQL() {
 		cudIndex := schemas.NewIndex("c_u_d", schemas.IndexType)
 		cudIndex.AddColumn("created_unix", "user_id", "is_deleted")
 		indices = append(indices, cudIndex)
@@ -640,7 +640,7 @@ func DeleteIssueActions(ctx context.Context, repoID, issueID int64) error {
 
 // CountActionCreatedUnixString count actions where created_unix is an empty string
 func CountActionCreatedUnixString(ctx context.Context) (int64, error) {
-	if setting.Database.UseSQLite3 {
+	if setting.Database.Type.IsSQLite3() {
 		return db.GetEngine(ctx).Where(`created_unix = ""`).Count(new(Action))
 	}
 	return 0, nil
@@ -648,7 +648,7 @@ func CountActionCreatedUnixString(ctx context.Context) (int64, error) {
 
 // FixActionCreatedUnixString set created_unix to zero if it is an empty string
 func FixActionCreatedUnixString(ctx context.Context) (int64, error) {
-	if setting.Database.UseSQLite3 {
+	if setting.Database.Type.IsSQLite3() {
 		res, err := db.GetEngine(ctx).Exec(`UPDATE action SET created_unix = 0 WHERE created_unix = ""`)
 		if err != nil {
 			return 0, err

models/activities/action_test.go

@@ -234,7 +234,7 @@ func TestGetFeedsCorrupted(t *testing.T) {
 }
 
 func TestConsistencyUpdateAction(t *testing.T) {
-	if !setting.Database.UseSQLite3 {
+	if !setting.Database.Type.IsSQLite3() {
 		t.Skip("Test is only for SQLite database.")
 	}
 	assert.NoError(t, unittest.PrepareTestDatabase())

models/activities/user_heatmap.go

@@ -39,9 +39,9 @@ func getUserHeatmapData(user *user_model.User, team *organization.Team, doer *us
 	groupBy := "created_unix / 900 * 900"
 	groupByName := "timestamp" // We need this extra case because mssql doesn't allow grouping by alias
 	switch {
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		groupBy = "created_unix DIV 900 * 900"
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		groupByName = groupBy
 	}
 

models/db/common.go

@@ -15,7 +15,7 @@ import (
 // BuildCaseInsensitiveLike returns a condition to check if the given value is like the given key case-insensitively.
 // Handles especially SQLite correctly as UPPER there only transforms ASCII letters.
 func BuildCaseInsensitiveLike(key, value string) builder.Cond {
-	if setting.Database.UseSQLite3 {
+	if setting.Database.Type.IsSQLite3() {
 		return builder.Like{"UPPER(" + key + ")", util.ToUpperASCII(value)}
 	}
 	return builder.Like{"UPPER(" + key + ")", strings.ToUpper(value)}

models/db/engine.go

@@ -100,12 +100,12 @@ func newXORMEngine() (*xorm.Engine, error) {
 
 	var engine *xorm.Engine
 
-	if setting.Database.UsePostgreSQL && len(setting.Database.Schema) > 0 {
+	if setting.Database.Type.IsPostgreSQL() && len(setting.Database.Schema) > 0 {
 		// OK whilst we sort out our schema issues - create a schema aware postgres
 		registerPostgresSchemaDriver()
 		engine, err = xorm.NewEngine("postgresschema", connStr)
 	} else {
-		engine, err = xorm.NewEngine(setting.Database.Type, connStr)
+		engine, err = xorm.NewEngine(setting.Database.Type.String(), connStr)
 	}
 
 	if err != nil {

models/db/index.go

@@ -73,7 +73,7 @@ func postgresGetNextResourceIndex(ctx context.Context, tableName string, groupID
 
 // GetNextResourceIndex generates a resource index, it must run in the same transaction where the resource is created
 func GetNextResourceIndex(ctx context.Context, tableName string, groupID int64) (int64, error) {
-	if setting.Database.UsePostgreSQL {
+	if setting.Database.Type.IsPostgreSQL() {
 		return postgresGetNextResourceIndex(ctx, tableName, groupID)
 	}
 

models/db/sequence.go

@@ -13,7 +13,7 @@ import (
 
 // CountBadSequences looks for broken sequences from recreate-table mistakes
 func CountBadSequences(_ context.Context) (int64, error) {
-	if !setting.Database.UsePostgreSQL {
+	if !setting.Database.Type.IsPostgreSQL() {
 		return 0, nil
 	}
 
@@ -34,7 +34,7 @@ func CountBadSequences(_ context.Context) (int64, error) {
 
 // FixBadSequences fixes for broken sequences from recreate-table mistakes
 func FixBadSequences(_ context.Context) error {
-	if !setting.Database.UsePostgreSQL {
+	if !setting.Database.Type.IsPostgreSQL() {
 		return nil
 	}
 

models/git/commit_status.go

@@ -65,7 +65,7 @@ func postgresGetCommitStatusIndex(ctx context.Context, repoID int64, sha string)
 
 // GetNextCommitStatusIndex retried 3 times to generate a resource index
 func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
-	if setting.Database.UsePostgreSQL {
+	if setting.Database.Type.IsPostgreSQL() {
 		return postgresGetCommitStatusIndex(ctx, repoID, sha)
 	}
 

models/issues/pull_list.go

@@ -52,13 +52,16 @@ func listPullRequestStatement(baseRepoID int64, opts *PullRequestsOptions) (*xor
 
 // GetUnmergedPullRequestsByHeadInfo returns all pull requests that are open and has not been merged
 // by given head information (repo and branch).
-func GetUnmergedPullRequestsByHeadInfo(repoID int64, branch string) ([]*PullRequest, error) {
+// arg `includeClosed` controls whether the SQL returns closed PRs
+func GetUnmergedPullRequestsByHeadInfo(repoID int64, branch string, includeClosed bool) ([]*PullRequest, error) {
 	prs := make([]*PullRequest, 0, 2)
-	return prs, db.GetEngine(db.DefaultContext).
+	sess := db.GetEngine(db.DefaultContext).
-		Where("head_repo_id = ? AND head_branch = ? AND has_merged = ? AND issue.is_closed = ? AND flow = ?",
-			repoID, branch, false, false, PullRequestFlowGithub).
 		Join("INNER", "issue", "issue.id = pull_request.issue_id").
-		Find(&prs)
+		Where("head_repo_id = ? AND head_branch = ? AND has_merged = ? AND flow = ?", repoID, branch, false, PullRequestFlowGithub)
+	if !includeClosed {
+		sess.Where("issue.is_closed = ?", false)
+	}
+	return prs, sess.Find(&prs)
 }
 
 // CanMaintainerWriteToBranch check whether user is a maintainer and could write to the branch
@@ -71,7 +74,7 @@ func CanMaintainerWriteToBranch(p access_model.Permission, branch string, user *
 		return false
 	}
 
-	prs, err := GetUnmergedPullRequestsByHeadInfo(p.Units[0].RepoID, branch)
+	prs, err := GetUnmergedPullRequestsByHeadInfo(p.Units[0].RepoID, branch, false)
 	if err != nil {
 		return false
 	}

models/issues/pull_test.go

@@ -118,7 +118,7 @@ func TestHasUnmergedPullRequestsByHeadInfo(t *testing.T) {
 
 func TestGetUnmergedPullRequestsByHeadInfo(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
-	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(1, "branch2")
+	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(1, "branch2", false)
 	assert.NoError(t, err)
 	assert.Len(t, prs, 1)
 	for _, pr := range prs {

models/migrations/base/db.go

@@ -89,7 +89,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 		hasID = hasID || (column.IsPrimaryKey && column.IsAutoIncrement)
 	}
 
-	if hasID && setting.Database.UseMSSQL {
+	if hasID && setting.Database.Type.IsMSSQL() {
 		if _, err := sess.Exec(fmt.Sprintf("SET IDENTITY_INSERT `%s` ON", tempTableName)); err != nil {
 			log.Error("Unable to set identity insert for table %s. Error: %v", tempTableName, err)
 			return err
@@ -143,7 +143,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 		return err
 	}
 
-	if hasID && setting.Database.UseMSSQL {
+	if hasID && setting.Database.Type.IsMSSQL() {
 		if _, err := sess.Exec(fmt.Sprintf("SET IDENTITY_INSERT `%s` OFF", tempTableName)); err != nil {
 			log.Error("Unable to switch off identity insert for table %s. Error: %v", tempTableName, err)
 			return err
@@ -151,7 +151,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 	}
 
 	switch {
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		// SQLite will drop all the constraints on the old table
 		if _, err := sess.Exec(fmt.Sprintf("DROP TABLE `%s`", tableName)); err != nil {
 			log.Error("Unable to drop old table %s. Error: %v", tableName, err)
@@ -178,7 +178,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 			return err
 		}
 
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		// MySQL will drop all the constraints on the old table
 		if _, err := sess.Exec(fmt.Sprintf("DROP TABLE `%s`", tableName)); err != nil {
 			log.Error("Unable to drop old table %s. Error: %v", tableName, err)
@@ -205,7 +205,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 			log.Error("Unable to recreate uniques on table %s. Error: %v", tableName, err)
 			return err
 		}
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		var originalSequences []string
 		type sequenceData struct {
 			LastValue int  `xorm:"'last_value'"`
@@ -296,7 +296,7 @@ func RecreateTable(sess *xorm.Session, bean interface{}) error {
 
 		}
 
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		// MSSQL will drop all the constraints on the old table
 		if _, err := sess.Exec(fmt.Sprintf("DROP TABLE `%s`", tableName)); err != nil {
 			log.Error("Unable to drop old table %s. Error: %v", tableName, err)
@@ -323,7 +323,7 @@ func DropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 	// TODO: This will not work if there are foreign keys
 
 	switch {
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		// First drop the indexes on the columns
 		res, errIndex := sess.Query(fmt.Sprintf("PRAGMA index_list(`%s`)", tableName))
 		if errIndex != nil {
@@ -405,7 +405,7 @@ func DropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 			return err
 		}
 
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		cols := ""
 		for _, col := range columnNames {
 			if cols != "" {
@@ -416,7 +416,7 @@ func DropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE `%s` %s", tableName, cols)); err != nil {
 			return fmt.Errorf("Drop table `%s` columns %v: %v", tableName, columnNames, err)
 		}
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		// Drop indexes on columns first
 		sql := fmt.Sprintf("SHOW INDEX FROM %s WHERE column_name IN ('%s')", tableName, strings.Join(columnNames, "','"))
 		res, err := sess.Query(sql)
@@ -444,7 +444,7 @@ func DropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE `%s` %s", tableName, cols)); err != nil {
 			return fmt.Errorf("Drop table `%s` columns %v: %v", tableName, columnNames, err)
 		}
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		cols := ""
 		for _, col := range columnNames {
 			if cols != "" {
@@ -543,13 +543,13 @@ func newXORMEngine() (*xorm.Engine, error) {
 
 func deleteDB() error {
 	switch {
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		if err := util.Remove(setting.Database.Path); err != nil {
 			return err
 		}
 		return os.MkdirAll(path.Dir(setting.Database.Path), os.ModePerm)
 
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/",
 			setting.Database.User, setting.Database.Passwd, setting.Database.Host))
 		if err != nil {
@@ -565,7 +565,7 @@ func deleteDB() error {
 			return err
 		}
 		return nil
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		db, err := sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/?sslmode=%s",
 			setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.SSLMode))
 		if err != nil {
@@ -612,7 +612,7 @@ func deleteDB() error {
 			}
 			return nil
 		}
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
 		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
 			host, port, "master", setting.Database.User, setting.Database.Passwd))

models/migrations/v1_12/v139.go

@@ -13,9 +13,9 @@ func PrependRefsHeadsToIssueRefs(x *xorm.Engine) error {
 	var query string
 
 	switch {
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		query = "UPDATE `issue` SET `ref` = 'refs/heads/' + `ref` WHERE `ref` IS NOT NULL AND `ref` <> '' AND `ref` NOT LIKE 'refs/%'"
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		query = "UPDATE `issue` SET `ref` = CONCAT('refs/heads/', `ref`) WHERE `ref` IS NOT NULL AND `ref` <> '' AND `ref` NOT LIKE 'refs/%';"
 	default:
 		query = "UPDATE `issue` SET `ref` = 'refs/heads/' || `ref` WHERE `ref` IS NOT NULL AND `ref` <> '' AND `ref` NOT LIKE 'refs/%'"

models/migrations/v1_13/v140.go

@@ -41,7 +41,7 @@ func FixLanguageStatsToSaveSize(x *xorm.Engine) error {
 
 	// Delete language stat statuses
 	truncExpr := "TRUNCATE TABLE"
-	if setting.Database.UseSQLite3 {
+	if setting.Database.Type.IsSQLite3() {
 		truncExpr = "DELETE FROM"
 	}
 

models/migrations/v1_13/v145.go

@@ -21,7 +21,7 @@ func IncreaseLanguageField(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseSQLite3 {
+	if setting.Database.Type.IsSQLite3() {
 		// SQLite maps VARCHAR to TEXT without size so we're done
 		return nil
 	}
@@ -41,11 +41,11 @@ func IncreaseLanguageField(x *xorm.Engine) error {
 	}
 
 	switch {
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat MODIFY COLUMN language %s", sqlType)); err != nil {
 			return err
 		}
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		// Yet again MSSQL just has to be awkward.
 		// Here we have to drop the constraints first and then rebuild them
 		constraints := make([]string, 0)
@@ -71,7 +71,7 @@ func IncreaseLanguageField(x *xorm.Engine) error {
 		if err := sess.CreateUniques(new(LanguageStat)); err != nil {
 			return err
 		}
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language TYPE %s", sqlType)); err != nil {
 			return err
 		}

models/migrations/v1_13/v151.go

@@ -17,13 +17,13 @@ import (
 
 func SetDefaultPasswordToArgon2(x *xorm.Engine) error {
 	switch {
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		_, err := x.Exec("ALTER TABLE `user` ALTER passwd_hash_algo SET DEFAULT 'argon2';")
 		return err
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		_, err := x.Exec("ALTER TABLE `user` ALTER COLUMN passwd_hash_algo SET DEFAULT 'argon2';")
 		return err
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		// need to find the constraint and drop it, then recreate it.
 		sess := x.NewSession()
 		defer sess.Close()
@@ -53,7 +53,7 @@ func SetDefaultPasswordToArgon2(x *xorm.Engine) error {
 		}
 		return sess.Commit()
 
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		// drop through
 	default:
 		log.Fatal("Unrecognized DB")

models/migrations/v1_14/v158.go

@@ -62,7 +62,7 @@ func UpdateCodeCommentReplies(x *xorm.Engine) error {
 			return err
 		}
 
-		if setting.Database.UseMSSQL {
+		if setting.Database.Type.IsMSSQL() {
 			if _, err := sess.Exec(sqlSelect + " INTO #temp_comments" + sqlTail); err != nil {
 				log.Error("unable to create temporary table")
 				return err
@@ -72,13 +72,13 @@ func UpdateCodeCommentReplies(x *xorm.Engine) error {
 		comments := make([]*Comment, 0, batchSize)
 
 		switch {
-		case setting.Database.UseMySQL:
+		case setting.Database.Type.IsMySQL():
 			sqlCmd = sqlSelect + sqlTail + " LIMIT " + strconv.Itoa(batchSize) + ", " + strconv.Itoa(start)
-		case setting.Database.UsePostgreSQL:
+		case setting.Database.Type.IsPostgreSQL():
 			fallthrough
-		case setting.Database.UseSQLite3:
+		case setting.Database.Type.IsSQLite3():
 			sqlCmd = sqlSelect + sqlTail + " LIMIT " + strconv.Itoa(batchSize) + " OFFSET " + strconv.Itoa(start)
-		case setting.Database.UseMSSQL:
+		case setting.Database.Type.IsMSSQL():
 			sqlCmd = "SELECT TOP " + strconv.Itoa(batchSize) + " * FROM #temp_comments WHERE " +
 				"(id NOT IN ( SELECT TOP " + strconv.Itoa(start) + " id FROM #temp_comments ORDER BY id )) ORDER BY id"
 		default:

models/migrations/v1_14/v175.go

@@ -14,7 +14,7 @@ import (
 )
 
 func FixPostgresIDSequences(x *xorm.Engine) error {
-	if !setting.Database.UsePostgreSQL {
+	if !setting.Database.Type.IsPostgreSQL() {
 		return nil
 	}
 

models/migrations/v1_15/v184.go

@@ -54,11 +54,11 @@ func RenameTaskErrorsToMessage(x *xorm.Engine) error {
 	}
 
 	switch {
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		if _, err := sess.Exec("ALTER TABLE `task` CHANGE errors message text"); err != nil {
 			return err
 		}
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		if _, err := sess.Exec("sp_rename 'task.errors', 'message', 'COLUMN'"); err != nil {
 			return err
 		}

models/migrations/v1_16/v191.go

@@ -16,7 +16,7 @@ func AlterIssueAndCommentTextFieldsToLongText(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseMySQL {
+	if setting.Database.Type.IsMySQL() {
 		if _, err := sess.Exec("ALTER TABLE `issue` CHANGE `content` `content` LONGTEXT"); err != nil {
 			return err
 		}

models/migrations/v1_17/v217.go

@@ -16,7 +16,7 @@ func AlterHookTaskTextFieldsToLongText(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseMySQL {
+	if setting.Database.Type.IsMySQL() {
 		if _, err := sess.Exec("ALTER TABLE `hook_task` CHANGE `payload_content` `payload_content` LONGTEXT, CHANGE `request_content` `request_content` LONGTEXT, change `response_content` `response_content` LONGTEXT"); err != nil {
 			return err
 		}

models/migrations/v1_17/v218.go

@@ -38,7 +38,7 @@ func (*improveActionTableIndicesAction) TableIndices() []*schemas.Index {
 	actUserIndex := schemas.NewIndex("au_r_c_u_d", schemas.IndexType)
 	actUserIndex.AddColumn("act_user_id", "repo_id", "created_unix", "user_id", "is_deleted")
 	indices := []*schemas.Index{actUserIndex, repoIndex}
-	if setting.Database.UsePostgreSQL {
+	if setting.Database.Type.IsPostgreSQL() {
 		cudIndex := schemas.NewIndex("c_u_d", schemas.IndexType)
 		cudIndex.AddColumn("created_unix", "user_id", "is_deleted")
 		indices = append(indices, cudIndex)

models/migrations/v1_17/v223.go

@@ -65,11 +65,11 @@ func RenameCredentialIDBytes(x *xorm.Engine) error {
 		}
 
 		switch {
-		case setting.Database.UseMySQL:
+		case setting.Database.Type.IsMySQL():
 			if _, err := sess.Exec("ALTER TABLE `webauthn_credential` CHANGE credential_id_bytes credential_id VARBINARY(1024)"); err != nil {
 				return err
 			}
-		case setting.Database.UseMSSQL:
+		case setting.Database.Type.IsMSSQL():
 			if _, err := sess.Exec("sp_rename 'webauthn_credential.credential_id_bytes', 'credential_id', 'COLUMN'"); err != nil {
 				return err
 			}

models/migrations/v1_18/v225.go

@@ -16,7 +16,7 @@ func AlterPublicGPGKeyContentFieldsToMediumText(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseMySQL {
+	if setting.Database.Type.IsMySQL() {
 		if _, err := sess.Exec("ALTER TABLE `gpg_key` CHANGE `content` `content` MEDIUMTEXT"); err != nil {
 			return err
 		}

models/migrations/v1_19/v232.go

@@ -16,7 +16,7 @@ func AlterPackageVersionMetadataToLongText(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseMySQL {
+	if setting.Database.Type.IsMySQL() {
 		if _, err := sess.Exec("ALTER TABLE `package_version` MODIFY COLUMN `metadata_json` LONGTEXT"); err != nil {
 			return err
 		}

models/migrations/v1_19/v242.go

@@ -17,7 +17,7 @@ func AlterPublicGPGKeyImportContentFieldToMediumText(x *xorm.Engine) error {
 		return err
 	}
 
-	if setting.Database.UseMySQL {
+	if setting.Database.Type.IsMySQL() {
 		if _, err := sess.Exec("ALTER TABLE `gpg_key_import` CHANGE `content` `content` MEDIUMTEXT"); err != nil {
 			return err
 		}

models/project/project.go

@@ -416,7 +416,7 @@ func DeleteProjectByID(ctx context.Context, id int64) error {
 
 func DeleteProjectByRepoID(ctx context.Context, repoID int64) error {
 	switch {
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		if _, err := db.GetEngine(ctx).Exec("DELETE FROM project_issue WHERE project_issue.id IN (SELECT project_issue.id FROM project_issue INNER JOIN project WHERE project.id = project_issue.project_id AND project.repo_id = ?)", repoID); err != nil {
 			return err
 		}
@@ -426,7 +426,7 @@ func DeleteProjectByRepoID(ctx context.Context, repoID int64) error {
 		if _, err := db.GetEngine(ctx).Table("project").Where("repo_id = ? ", repoID).Delete(&Project{}); err != nil {
 			return err
 		}
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		if _, err := db.GetEngine(ctx).Exec("DELETE FROM project_issue USING project WHERE project.id = project_issue.project_id AND project.repo_id = ? ", repoID); err != nil {
 			return err
 		}

models/repo/repo_list.go

@@ -498,7 +498,7 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 		subQueryCond := builder.NewCond()
 
 		// Topic checking. Topics are present.
-		if setting.Database.UsePostgreSQL { // postgres stores the topics as json and not as text
+		if setting.Database.Type.IsPostgreSQL() { // postgres stores the topics as json and not as text
 			subQueryCond = subQueryCond.Or(builder.And(builder.NotNull{"topics"}, builder.Neq{"(topics)::text": "[]"}))
 		} else {
 			subQueryCond = subQueryCond.Or(builder.And(builder.Neq{"topics": "null"}, builder.Neq{"topics": "[]"}))

models/unittest/testdb.go

@@ -76,7 +76,7 @@ func MainTest(m *testing.M, testOpts *TestOptions) {
 	setting.SSH.BuiltinServerUser = "builtinuser"
 	setting.SSH.Port = 3000
 	setting.SSH.Domain = "try.gitea.io"
-	setting.Database.UseSQLite3 = true
+	setting.Database.Type = "sqlite3"
 	setting.Repository.DefaultBranch = "master" // many test code still assume that default branch is called "master"
 	repoRootPath, err := os.MkdirTemp(os.TempDir(), "repos")
 	if err != nil {

modules/doctor/dbconsistency.go

@@ -155,7 +155,7 @@ func checkDBConsistency(ctx context.Context, logger log.Logger, autofix bool) er
 
 	// TODO: function to recalc all counters
 
-	if setting.Database.UsePostgreSQL {
+	if setting.Database.Type.IsPostgreSQL() {
 		consistencyChecks = append(consistencyChecks, consistencyCheck{
 			Name:         "Sequence values",
 			Counter:      db.CountBadSequences,

modules/setting/database.go

@@ -27,7 +27,7 @@ var (
 
 	// Database holds the database settings
 	Database = struct {
-		Type              string
+		Type              DatabaseType
 		Host              string
 		Name              string
 		User              string
@@ -39,10 +39,6 @@ var (
 		Charset           string
 		Timeout           int // seconds
 		SQLiteJournalMode string
-		UseSQLite3        bool
-		UseMySQL          bool
-		UseMSSQL          bool
-		UsePostgreSQL     bool
 		DBConnectRetries  int
 		DBConnectBackoff  time.Duration
 		MaxIdleConns      int
@@ -59,24 +55,13 @@ var (
 // LoadDBSetting loads the database settings
 func LoadDBSetting() {
 	sec := CfgProvider.Section("database")
-	Database.Type = sec.Key("DB_TYPE").String()
+	Database.Type = DatabaseType(sec.Key("DB_TYPE").String())
 	defaultCharset := "utf8"
-	Database.UseMySQL = false
-	Database.UseSQLite3 = false
-	Database.UsePostgreSQL = false
-	Database.UseMSSQL = false
 
-	switch Database.Type {
+	if Database.Type.IsMySQL() {
-	case "sqlite3":
-		Database.UseSQLite3 = true
-	case "mysql":
-		Database.UseMySQL = true
 		defaultCharset = "utf8mb4"
-	case "postgres":
-		Database.UsePostgreSQL = true
-	case "mssql":
-		Database.UseMSSQL = true
 	}
+
 	Database.Host = sec.Key("HOST").String()
 	Database.Name = sec.Key("NAME").String()
 	Database.User = sec.Key("USER").String()
@@ -86,7 +71,7 @@ func LoadDBSetting() {
 	Database.Schema = sec.Key("SCHEMA").String()
 	Database.SSLMode = sec.Key("SSL_MODE").MustString("disable")
 	Database.Charset = sec.Key("CHARSET").In(defaultCharset, []string{"utf8", "utf8mb4"})
-	if Database.UseMySQL && defaultCharset != "utf8mb4" {
+	if Database.Type.IsMySQL() && defaultCharset != "utf8mb4" {
 		log.Error("Deprecated database mysql charset utf8 support, please use utf8mb4 or convert utf8 to utf8mb4.")
 	}
 
@@ -95,7 +80,7 @@ func LoadDBSetting() {
 	Database.SQLiteJournalMode = sec.Key("SQLITE_JOURNAL_MODE").MustString("")
 
 	Database.MaxIdleConns = sec.Key("MAX_IDLE_CONNS").MustInt(2)
-	if Database.UseMySQL {
+	if Database.Type.IsMySQL() {
 		Database.ConnMaxLifetime = sec.Key("CONN_MAX_LIFETIME").MustDuration(3 * time.Second)
 	} else {
 		Database.ConnMaxLifetime = sec.Key("CONN_MAX_LIFETIME").MustDuration(0)
@@ -207,3 +192,25 @@ func ParseMSSQLHostPort(info string) (string, string) {
 	}
 	return host, port
 }
+
+type DatabaseType string
+
+func (t DatabaseType) String() string {
+	return string(t)
+}
+
+func (t DatabaseType) IsSQLite3() bool {
+	return t == "sqlite3"
+}
+
+func (t DatabaseType) IsMySQL() bool {
+	return t == "mysql"
+}
+
+func (t DatabaseType) IsMSSQL() bool {
+	return t == "mssql"
+}
+
+func (t DatabaseType) IsPostgreSQL() bool {
+	return t == "postgres"
+}

modules/typesniffer/typesniffer.go

@@ -4,6 +4,7 @@
 package typesniffer
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"net/http"
@@ -24,8 +25,9 @@ const (
 )
 
 var (
-	svgTagRegex      = regexp.MustCompile(`(?si)\A\s*(?:(<!--.*?-->|<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg[\s>\/]`)
+	svgComment       = regexp.MustCompile(`(?s)<!--.*?-->`)
-	svgTagInXMLRegex = regexp.MustCompile(`(?si)\A<\?xml\b.*?\?>\s*(?:(<!--.*?-->|<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg[\s>\/]`)
+	svgTagRegex      = regexp.MustCompile(`(?si)\A\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
+	svgTagInXMLRegex = regexp.MustCompile(`(?si)\A<\?xml\b.*?\?>\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
 )
 
 // SniffedType contains information about a blobs type.
@@ -91,10 +93,17 @@ func DetectContentType(data []byte) SniffedType {
 		data = data[:sniffLen]
 	}
 
-	if (strings.Contains(ct, "text/plain") || strings.Contains(ct, "text/html")) && svgTagRegex.Match(data) ||
+	// SVG is unsupported by http.DetectContentType, https://github.com/golang/go/issues/15888
-		strings.Contains(ct, "text/xml") && svgTagInXMLRegex.Match(data) {
+
-		// SVG is unsupported. https://github.com/golang/go/issues/15888
+	detectByHTML := strings.Contains(ct, "text/plain") || strings.Contains(ct, "text/html")
-		ct = SvgMimeType
+	detectByXML := strings.Contains(ct, "text/xml")
+	if detectByHTML || detectByXML {
+		dataProcessed := svgComment.ReplaceAll(data, nil)
+		dataProcessed = bytes.TrimSpace(dataProcessed)
+		if detectByHTML && svgTagRegex.Match(dataProcessed) ||
+			detectByXML && svgTagInXMLRegex.Match(dataProcessed) {
+			ct = SvgMimeType
+		}
 	}
 
 	return SniffedType{ct}

modules/typesniffer/typesniffer_test.go

@@ -28,7 +28,6 @@ func TestIsSvgImage(t *testing.T) {
 	assert.True(t, DetectContentType([]byte("<svg></svg>")).IsSvgImage())
 	assert.True(t, DetectContentType([]byte("    <svg></svg>")).IsSvgImage())
 	assert.True(t, DetectContentType([]byte(`<svg width="100"></svg>`)).IsSvgImage())
-	assert.True(t, DetectContentType([]byte("<svg/>")).IsSvgImage())
 	assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?><svg></svg>`)).IsSvgImage())
 	assert.True(t, DetectContentType([]byte(`<!-- Comment -->
 	<svg></svg>`)).IsSvgImage())
@@ -57,6 +56,10 @@ func TestIsSvgImage(t *testing.T) {
 	<!-- Multline
 	Comment -->
 	<svg></svg>`)).IsSvgImage())
+
+	// the DetectContentType should work for incomplete data, because only beginning bytes are used for detection
+	assert.True(t, DetectContentType([]byte(`<svg>....`)).IsSvgImage())
+
 	assert.False(t, DetectContentType([]byte{}).IsSvgImage())
 	assert.False(t, DetectContentType([]byte("svg")).IsSvgImage())
 	assert.False(t, DetectContentType([]byte("<svgfoo></svgfoo>")).IsSvgImage())
@@ -68,6 +71,26 @@ func TestIsSvgImage(t *testing.T) {
 	assert.False(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
 	<!-- <svg></svg> inside comment -->
 	<foo></foo>`)).IsSvgImage())
+
+	assert.False(t, DetectContentType([]byte(`
+<!-- comment1 -->
+<div>
+	<!-- comment2 -->
+	<svg></svg>
+</div>
+`)).IsSvgImage())
+
+	assert.False(t, DetectContentType([]byte(`
+<!-- comment1
+-->
+<div>
+	<!-- comment2
+-->
+	<svg></svg>
+</div>
+`)).IsSvgImage())
+	assert.False(t, DetectContentType([]byte(`<html><body><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg></svg></body></html>`)).IsSvgImage())
+	assert.False(t, DetectContentType([]byte(`<html><body><?xml version="1.0" encoding="UTF-8"?><svg></svg></body></html>`)).IsSvgImage())
 }
 
 func TestIsPDF(t *testing.T) {

routers/init.go

@@ -141,7 +141,7 @@ func GlobalInitInstalled(ctx context.Context) {
 
 	if setting.EnableSQLite3 {
 		log.Info("SQLite3 support is enabled")
-	} else if setting.Database.UseSQLite3 {
+	} else if setting.Database.Type.IsSQLite3() {
 		log.Fatal("SQLite3 support is disabled, but it is used for database setting. Please get or build a Gitea release with SQLite3 support.")
 	}
 

routers/install/install.go

@@ -104,7 +104,7 @@ func Install(ctx *context.Context) {
 	form.DbSchema = setting.Database.Schema
 	form.Charset = setting.Database.Charset
 
-	curDBType := setting.Database.Type
+	curDBType := setting.Database.Type.String()
 	var isCurDBTypeSupported bool
 	for _, dbType := range setting.SupportedDatabaseTypes {
 		if dbType == curDBType {
@@ -272,7 +272,7 @@ func SubmitInstall(ctx *context.Context) {
 	// ---- Basic checks are passed, now test configuration.
 
 	// Test database setting.
-	setting.Database.Type = form.DbType
+	setting.Database.Type = setting.DatabaseType(form.DbType)
 	setting.Database.Host = form.DbHost
 	setting.Database.User = form.DbUser
 	setting.Database.Passwd = form.DbPasswd
@@ -392,7 +392,7 @@ func SubmitInstall(ctx *context.Context) {
 			log.Error("Failed to load custom conf '%s': %v", setting.CustomConf, err)
 		}
 	}
-	cfg.Section("database").Key("DB_TYPE").SetValue(setting.Database.Type)
+	cfg.Section("database").Key("DB_TYPE").SetValue(setting.Database.Type.String())
 	cfg.Section("database").Key("HOST").SetValue(setting.Database.Host)
 	cfg.Section("database").Key("NAME").SetValue(setting.Database.Name)
 	cfg.Section("database").Key("USER").SetValue(setting.Database.User)

routers/web/healthcheck/check.go

@@ -100,7 +100,7 @@ func checkDatabase(checks checks) status {
 		st.Time = getCheckTime()
 	}
 
-	if setting.Database.UseSQLite3 && st.Status == pass {
+	if setting.Database.Type.IsSQLite3() && st.Status == pass {
 		if !setting.EnableSQLite3 {
 			st.Status = fail
 			st.Time = getCheckTime()

routers/web/repo/issue.go

@@ -1415,11 +1415,12 @@ func ViewIssue(ctx *context.Context) {
 	}
 
 	var (
-		role         issues_model.RoleDescriptor
+		role                 issues_model.RoleDescriptor
-		ok           bool
+		ok                   bool
-		marked       = make(map[int64]issues_model.RoleDescriptor)
+		marked               = make(map[int64]issues_model.RoleDescriptor)
-		comment      *issues_model.Comment
+		comment              *issues_model.Comment
-		participants = make([]*user_model.User, 1, 10)
+		participants         = make([]*user_model.User, 1, 10)
+		latestCloseCommentID int64
 	)
 	if ctx.Repo.Repository.IsTimetrackerEnabled(ctx) {
 		if ctx.IsSigned {
@@ -1626,9 +1627,15 @@ func ViewIssue(ctx *context.Context) {
 			comment.Type == issues_model.CommentTypeStopTracking {
 			// drop error since times could be pruned from DB..
 			_ = comment.LoadTime()
+		} else if comment.Type == issues_model.CommentTypeClose {
+			// record ID of latest closed comment.
+			// if PR is closed, the comments whose type is CommentTypePullRequestPush(29) after latestCloseCommentID won't be rendered.
+			latestCloseCommentID = comment.ID
 		}
 	}
 
+	ctx.Data["LatestCloseCommentID"] = latestCloseCommentID
+
 	// Combine multiple label assignments into a single comment
 	combineLabelComments(issue)
 

routers/web/repo/pull.go

@@ -587,7 +587,7 @@ func PrepareViewPullInfo(ctx *context.Context, issue *issues_model.Issue) *git.C
 	ctx.Data["HeadBranchCommitID"] = headBranchSha
 	ctx.Data["PullHeadCommitID"] = sha
 
-	if pull.HeadRepo == nil || !headBranchExist || headBranchSha != sha {
+	if pull.HeadRepo == nil || !headBranchExist || (!pull.Issue.IsClosed && (headBranchSha != sha)) {
 		ctx.Data["IsPullRequestBroken"] = true
 		if pull.IsSameRepo() {
 			ctx.Data["HeadTarget"] = pull.HeadBranch

services/pull/pull.go

@@ -257,7 +257,7 @@ func AddTestPullRequestTask(doer *user_model.User, repoID int64, branch string,
 		// If you don't let it run all the way then you will lose data
 		// TODO: graceful: AddTestPullRequestTask needs to become a queue!
 
-		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch)
+		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch, true)
 		if err != nil {
 			log.Error("Find pull requests [head_repo_id: %d, head_branch: %s]: %v", repoID, branch, err)
 			return
@@ -500,7 +500,7 @@ func (errs errlist) Error() string {
 
 // CloseBranchPulls close all the pull requests who's head branch is the branch
 func CloseBranchPulls(doer *user_model.User, repoID int64, branch string) error {
-	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch)
+	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch, false)
 	if err != nil {
 		return err
 	}
@@ -536,7 +536,7 @@ func CloseRepoBranchesPulls(ctx context.Context, doer *user_model.User, repo *re
 
 	var errs errlist
 	for _, branch := range branches {
-		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repo.ID, branch.Name)
+		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repo.ID, branch.Name, false)
 		if err != nil {
 			return err
 		}

templates/repo/issue/view_content/comments.tmpl

@@ -697,6 +697,10 @@
 				</span>
 			</div>
 		{{else if and (eq .Type 29) (or (gt .CommitsNum 0) .IsForcePush)}}
+			<!-- If PR is closed, the comments whose type is CommentTypePullRequestPush(29) after latestCloseCommentID won't be rendered. //-->
+			{{if and .Issue.IsClosed (gt .ID $.LatestCloseCommentID)}}
+				{{continue}}
+			{{end}}
 			<div class="timeline-item event" id="{{.HashTag}}">
 				<span class="badge">{{svg "octicon-repo-push"}}</span>
 				<span class="text grey muted-links">

tests/integration/markup_external_test.go

@@ -19,7 +19,7 @@ import (
 
 func TestExternalMarkupRenderer(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
-	if !setting.Database.UseSQLite3 {
+	if !setting.Database.Type.IsSQLite3() {
 		t.Skip()
 		return
 	}

tests/integration/migration-test/migration_test.go

@@ -94,7 +94,7 @@ func availableVersions() ([]string, error) {
 		return nil, err
 	}
 	defer migrationsDir.Close()
-	versionRE, err := regexp.Compile("gitea-v(?P<version>.+)\\." + regexp.QuoteMeta(setting.Database.Type) + "\\.sql.gz")
+	versionRE, err := regexp.Compile("gitea-v(?P<version>.+)\\." + regexp.QuoteMeta(setting.Database.Type.String()) + "\\.sql.gz")
 	if err != nil {
 		return nil, err
 	}
@@ -149,7 +149,7 @@ func restoreOldDB(t *testing.T, version string) bool {
 	}
 
 	switch {
-	case setting.Database.UseSQLite3:
+	case setting.Database.Type.IsSQLite3():
 		util.Remove(setting.Database.Path)
 		err := os.MkdirAll(path.Dir(setting.Database.Path), os.ModePerm)
 		assert.NoError(t, err)
@@ -162,7 +162,7 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/",
 			setting.Database.User, setting.Database.Passwd, setting.Database.Host))
 		assert.NoError(t, err)
@@ -184,7 +184,7 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		var db *sql.DB
 		var err error
 		if setting.Database.Host[0] == '/' {
@@ -252,7 +252,7 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
 		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
 			host, port, "master", setting.Database.User, setting.Database.Passwd))

tests/test_utils.go

@@ -72,7 +72,7 @@ func InitTest(requireGitea bool) {
 	}
 
 	switch {
-	case setting.Database.UseMySQL:
+	case setting.Database.Type.IsMySQL():
 		connType := "tcp"
 		if len(setting.Database.Host) > 0 && setting.Database.Host[0] == '/' { // looks like a unix socket
 			connType = "unix"
@@ -87,7 +87,7 @@ func InitTest(requireGitea bool) {
 		if _, err = db.Exec(fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", setting.Database.Name)); err != nil {
 			log.Fatal("db.Exec: %v", err)
 		}
-	case setting.Database.UsePostgreSQL:
+	case setting.Database.Type.IsPostgreSQL():
 		var db *sql.DB
 		var err error
 		if setting.Database.Host[0] == '/' {
@@ -144,7 +144,7 @@ func InitTest(requireGitea bool) {
 			}
 		}
 
-	case setting.Database.UseMSSQL:
+	case setting.Database.Type.IsMSSQL():
 		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
 		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
 			host, port, "master", setting.Database.User, setting.Database.Passwd))

web_src/js/features/imagediff.js

@@ -129,8 +129,8 @@ export function initImageDiff() {
         initOverlay(createContext($imageAfter[2], $imageBefore[2]));
       }
 
-      hideElem($container.find('> .loader'));
       $container.find('> .gt-hidden').removeClass('gt-hidden');
+      hideElem($container.find('.ui.loader'));
     }
 
     function initSideBySide(sizes) {
@@ -155,7 +155,7 @@ export function initImageDiff() {
         height: sizes.size1.height * factor
       });
       sizes.image1.parent().css({
-        margin: `${sizes.ratio[1] * factor + 15}px ${sizes.ratio[0] * factor}px ${sizes.ratio[1] * factor}px`,
+        margin: `10px auto`,
         width: sizes.size1.width * factor + 2,
         height: sizes.size1.height * factor + 2
       });
@@ -164,7 +164,7 @@ export function initImageDiff() {
         height: sizes.size2.height * factor
       });
       sizes.image2.parent().css({
-        margin: `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`,
+        margin: `10px auto`,
         width: sizes.size2.width * factor + 2,
         height: sizes.size2.height * factor + 2
       });
@@ -255,13 +255,12 @@ export function initImageDiff() {
         width: sizes.size2.width * factor + 2,
         height: sizes.size2.height * factor + 2
       });
+
+      // some inner elements are `position: absolute`, so the container's height must be large enough
+      // the "css(width, height)" is somewhat hacky and not easy to understand, it could be improved in the future
       sizes.image2.parent().parent().css({
         width: sizes.max.width * factor + 2,
-        height: sizes.max.height * factor + 2
+        height: sizes.max.height * factor + 2 + 20 /* extra height for inner "position: absolute" elements */,
-      });
-      $container.find('.onion-skin').css({
-        width: sizes.max.width * factor + 2,
-        height: sizes.max.height * factor + 4
       });
 
       const $range = $container.find("input[type='range']");

web_src/js/svg.js

@@ -80,7 +80,8 @@ export function svg(name, size = 16, className = '') {
   const svgNode = document.firstChild;
   if (size !== 16) svgNode.setAttribute('width', String(size));
   if (size !== 16) svgNode.setAttribute('height', String(size));
-  if (className) svgNode.classList.add(...className.split(/\s+/));
+  // filter array to remove empty string
+  if (className) svgNode.classList.add(...className.split(/\s+/).filter(Boolean));
   return serializer.serializeToString(svgNode);
 }
 

web_src/less/features/imagediff.less

@@ -1,6 +1,6 @@
 .image-diff-container {
   text-align: center;
-  padding: 30px 0;
+  padding: 1em 0;
 
   img {
     border: 1px solid var(--color-primary-light-7);
@@ -22,6 +22,7 @@
       display: inline-block;
       line-height: 0;
       vertical-align: top;
+      margin: 0 1em;
 
       .side-header {
         font-weight: bold;
@@ -98,7 +99,7 @@
     }
 
     input {
-      width: 300px;
+      max-width: 300px;
     }
   }
 }