i18n: localize help screen chrome

docs/CHANGELOG.md

@@ -10,6 +10,8 @@
   their current session.
 - COMMAND-mode `:help`, unknown-command guidance, language command output, and
   continuation prompts now follow the session UI language.
+- The full-screen help title and footer now follow the session UI language,
+  with UTF-8-aware title padding for Chinese.
 
 ### Changed
 - NORMAL mode now opens at the latest visible messages instead of the oldest

include/i18n.h

@@ -10,7 +10,9 @@ typedef enum {
     I18N_INSERT_HINT_WIDE,
     I18N_INSERT_HINT_NARROW,
     I18N_NORMAL_LATEST,
-    I18N_NORMAL_NEW_MESSAGES
+    I18N_NORMAL_NEW_MESSAGES,
+    I18N_HELP_TITLE,
+    I18N_HELP_STATUS_FORMAT
 } i18n_text_id_t;
 
 bool i18n_try_parse_lang(const char *value, help_lang_t *lang);

src/i18n.c

@@ -85,6 +85,10 @@ const char *i18n_text(help_lang_t lang, i18n_text_id_t id) {
                 return "G 最新";
             case I18N_NORMAL_NEW_MESSAGES:
                 return "新消息";
+            case I18N_HELP_TITLE:
+                return " 帮助 ";
+            case I18N_HELP_STATUS_FORMAT:
+                return "-- 帮助 -- (%d/%d) j/k:滚动 g/G:首尾 e/z:语言 q:关闭";
         }
     }
 
@@ -103,6 +107,10 @@ const char *i18n_text(help_lang_t lang, i18n_text_id_t id) {
             return "G latest";
         case I18N_NORMAL_NEW_MESSAGES:
             return "new";
+        case I18N_HELP_TITLE:
+            return " HELP ";
+        case I18N_HELP_STATUS_FORMAT:
+            return "-- HELP -- (%d/%d) j/k:scroll g/G:top/bottom e/z:lang q:close";
     }
 
     return "";

src/tui.c

@@ -3,6 +3,7 @@
 #include "ssh_server.h"
 #include "chat_room.h"
 #include "history_view.h"
+#include "i18n.h"
 #include "tui_status.h"
 #include "utf8.h"
 #include <unistd.h>
@@ -875,8 +876,8 @@ void tui_render_help(client_t *client) {
     buffer_appendf(buffer, sizeof(buffer), &pos, ANSI_CLEAR ANSI_HOME);
 
     /* Title */
-    const char *title = " HELP ";
-    int title_width = strlen(title);
+    const char *title = i18n_text(client->help_lang, I18N_HELP_TITLE);
+    int title_width = utf8_string_width(title);
     int padding = rw - title_width;
     if (padding < 0) padding = 0;
 
@@ -921,7 +922,7 @@ void tui_render_help(client_t *client) {
 
     /* Status line */
     buffer_appendf(buffer, sizeof(buffer), &pos,
-                   "-- HELP -- (%d/%d) j/k:scroll g/G:top/bottom e/z:lang q:close",
+                   i18n_text(client->help_lang, I18N_HELP_STATUS_FORMAT),
                    start + 1, max_scroll + 1);
 
     client_send(client, buffer, pos);

tests/unit/test_i18n.c

@@ -62,6 +62,10 @@ TEST(text_lookup_matches_language) {
                   "display name") != NULL);
     assert(strstr(i18n_text(LANG_ZH, I18N_USERNAME_PROMPT),
                   "用户名") != NULL);
+    assert(strstr(i18n_text(LANG_EN, I18N_HELP_STATUS_FORMAT),
+                  "HELP") != NULL);
+    assert(strstr(i18n_text(LANG_ZH, I18N_HELP_STATUS_FORMAT),
+                  "帮助") != NULL);
     assert(strcmp(i18n_lang_code(LANG_EN), "en") == 0);
     assert(strcmp(i18n_lang_code(LANG_ZH), "zh") == 0);
 }