feat(ui): localize theme names (#7168)

Allow translating theme names. Not even for i18n reasons but because this way the menu is clearer and cleaner.

The number of translated entries is kept minimal for now. It is easy to pollute locales with these names otherwise.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7168
Reviewed-by: Gusted <gusted@noreply.codeberg.org>

.deadcode-out

@@ -189,6 +189,7 @@ code.gitea.io/gitea/modules/translation
 	MockLocale.TrN
 	MockLocale.TrPluralString
 	MockLocale.TrSize
+	MockLocale.HasKey
 	MockLocale.PrettyNumber
 
 code.gitea.io/gitea/modules/util

modules/translation/mock.go

@@ -39,6 +39,10 @@ func (l MockLocale) TrSize(s int64) ReadableSize {
 	return ReadableSize{fmt.Sprint(s), ""}
 }
 
+func (l MockLocale) HasKey(key string) bool {
+	return true
+}
+
 func (l MockLocale) PrettyNumber(v any) string {
 	return fmt.Sprint(v)
 }

modules/translation/translation.go

@@ -39,6 +39,8 @@ type Locale interface {
 
 	TrSize(size int64) ReadableSize
 
+	HasKey(trKey string) bool
+
 	PrettyNumber(v any) string
 }
 

options/locale_next/locale_en-US.json

@@ -13,5 +13,8 @@
 		"other": "wants to merge %[1]d commits from <code>%[2]s</code> into <code id=\"%[4]s\">%[3]s</code>"
 	},
 	"search.milestone_kind": "Search milestones…",
-	"incorrect_root_url": "This Forgejo instance is configured to be served on \"%s\". You are currently viewing Forgejo through a different URL, which may cause parts of the application to break. The canonical URL is controlled by Forgejo admins via the ROOT_URL setting in the app.ini."
+	"incorrect_root_url": "This Forgejo instance is configured to be served on \"%s\". You are currently viewing Forgejo through a different URL, which may cause parts of the application to break. The canonical URL is controlled by Forgejo admins via the ROOT_URL setting in the app.ini.",
+  "themes.names.forgejo-auto": "Forgejo (follow system theme)",
+  "themes.names.forgejo-light": "Forgejo light",
+  "themes.names.forgejo-dark": "Forgejo dark"
 }

routers/web/user/setting/profile.go

@@ -330,6 +330,13 @@ func Appearance(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("settings.appearance")
 	ctx.Data["PageIsSettingsAppearance"] = true
 	ctx.Data["AllThemes"] = setting.UI.Themes
+	ctx.Data["ThemeName"] = func(themeName string) string {
+		fullThemeName := "themes.names." + themeName
+		if ctx.Locale.HasKey(fullThemeName) {
+			return ctx.Locale.TrString(fullThemeName)
+		}
+		return themeName
+	}
 
 	var hiddenCommentTypes *big.Int
 	val, err := user_model.GetUserSetting(ctx, ctx.Doer.ID, user_model.SettingsKeyHiddenCommentTypes)

templates/user/settings/appearance.tmpl

@@ -19,15 +19,15 @@
 							<input name="theme" type="hidden" value="{{.SignedUser.Theme}}">
 							{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 							<div class="text">
-								{{range $i,$a := .AllThemes}}
-									{{if eq $.SignedUser.Theme $a}}{{$a}}{{end}}
-								{{end}}
+								{{- range $i,$a := .AllThemes -}}
+									{{if eq $.SignedUser.Theme $a}}{{call $.ThemeName $a}}{{end}}
+								{{- end -}}
 							</div>
 
 							<div class="menu">
 							{{range $i,$a := .AllThemes}}
 								<div class="item{{if eq $.SignedUser.Theme $a}} active selected{{end}}" data-value="{{$a}}">
-									{{$a}}
+									{{call $.ThemeName $a}}
 								</div>
 							{{end}}
 							</div>

tests/integration/appearance_settings_test.go

@@ -5,6 +5,7 @@ package integration
 
 import (
 	"net/http"
+	"strings"
 	"testing"
 
 	"code.gitea.io/gitea/tests"
@@ -16,15 +17,21 @@ func TestThemeChange(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
 	user := loginUser(t, "user2")
 
-	testSelectedTheme(t, user, "forgejo-auto")
+	// Verify default theme
+	testSelectedTheme(t, user, "forgejo-auto", "Forgejo (follow system theme)")
 
+	// Change theme to forgejo-dark and verify it works fine
 	testChangeTheme(t, user, "forgejo-dark")
-	testSelectedTheme(t, user, "forgejo-dark")
+	testSelectedTheme(t, user, "forgejo-dark", "Forgejo dark")
+
+	// Change theme to gitea-dark and also verify that it's name is not translated
+	testChangeTheme(t, user, "gitea-dark")
+	testSelectedTheme(t, user, "gitea-dark", "gitea-dark")
 }
 
 // testSelectedTheme checks that the expected theme is used in html[data-theme]
 // and is default on appearance page
-func testSelectedTheme(t *testing.T, session *TestSession, expectedTheme string) {
+func testSelectedTheme(t *testing.T, session *TestSession, expectedTheme, expectedName string) {
 	t.Helper()
 	response := session.MakeRequest(t, NewRequest(t, "GET", "/user/settings/appearance"), http.StatusOK)
 	page := NewHTMLParser(t, response.Body)
@@ -33,9 +40,11 @@ func testSelectedTheme(t *testing.T, session *TestSession, expectedTheme string)
 	assert.True(t, dataThemeExists)
 	assert.EqualValues(t, expectedTheme, dataTheme)
 
-	selectorTheme, selectorThemeExists := page.Find("form[action='/user/settings/appearance/theme'] input[name='theme']").Attr("value")
+	selectedTheme := page.Find("form[action='/user/settings/appearance/theme'] .menu .item.selected")
+	selectorTheme, selectorThemeExists := selectedTheme.Attr("data-value")
 	assert.True(t, selectorThemeExists)
 	assert.EqualValues(t, expectedTheme, selectorTheme)
+	assert.EqualValues(t, expectedName, strings.TrimSpace(selectedTheme.Text()))
 }
 
 // testSelectedTheme changes user's theme