feat: Allow setting language through the command line

lib/libimhex/source/api/imhex_api.cpp

@@ -548,7 +548,6 @@ namespace hex {
         void enableSystemThemeDetection(bool enabled) {
             s_systemThemeDetection = enabled;
 
-            EventSettingsChanged::post();
             EventOSThemeChanged::post();
         }
 

lib/libimhex/source/api/localization_manager.cpp

@@ -42,13 +42,13 @@ namespace hex {
         }
 
         void loadLanguage(const std::string &language) {
-            s_currStrings->clear();
-
             auto &definitions = ContentRegistry::Language::impl::getLanguageDefinitions();
 
             if (!definitions.contains(language))
                 return;
 
+            s_currStrings->clear();
+
             for (auto &definition : definitions[language])
                 s_currStrings->insert(definition.getEntries().begin(), definition.getEntries().end());
 

main/gui/source/main.cpp

@@ -113,7 +113,7 @@ namespace {
 
         // Draw the splash window while tasks are running
         if (!splashWindow.loop())
-            ImHexApi::System::getInitArguments().insert({ "tasks-failed", {} });
+            ImHexApi::System::impl::addInitArgument("tasks-failed");
     }
 
 

plugins/builtin/include/content/command_line_interface.hpp

@@ -8,6 +8,7 @@ namespace hex::plugin::builtin {
     void handleVersionCommand(const std::vector<std::string> &args);
     void handleHelpCommand(const std::vector<std::string> &args);
     void handlePluginsCommand(const std::vector<std::string> &args);
+    void handleLanguageCommand(const std::vector<std::string> &args);
 
     void handleOpenCommand(const std::vector<std::string> &args);
 

plugins/builtin/source/content/command_line_interface.cpp

@@ -130,6 +130,15 @@ namespace hex::plugin::builtin {
         }
     }
 
+    void handleLanguageCommand(const std::vector<std::string> &args) {
+        if (args.empty()) {
+            hex::log::println("usage: imhex --language <language>");
+            std::exit(EXIT_FAILURE);
+        }
+
+        ImHexApi::System::impl::addInitArgument("language", args[0]);
+    }
+
     void handleHashCommand(const std::vector<std::string> &args) {
         if (args.size() != 2) {
             hex::log::println("usage: imhex --hash <algorithm> <file>");

plugins/builtin/source/content/events.cpp

@@ -222,6 +222,12 @@ namespace hex::plugin::builtin {
             }
         });
 
+        EventImHexStartupFinished::subscribe([] {
+            const auto &initArgs = ImHexApi::System::getInitArguments();
+            if (auto it = initArgs.find("language"); it != initArgs.end())
+                LocalizationManager::loadLanguage(it->second);
+        });
+
         fs::setFileBrowserErrorCallback([](const std::string& errMsg){
             #if defined(NFD_PORTAL)
                 ui::PopupError::open(hex::format("hex.builtin.popup.error.file_dialog.portal"_lang, errMsg));

plugins/builtin/source/plugin_builtin.cpp

@@ -60,6 +60,7 @@ IMHEX_PLUGIN_SUBCOMMANDS() {
     { "help",       "Print help about this command",                hex::plugin::builtin::handleHelpCommand             },
     { "version",    "Print ImHex version",                          hex::plugin::builtin::handleVersionCommand          },
     { "plugins",    "Lists all plugins that have been installed",   hex::plugin::builtin::handlePluginsCommand          },
+    { "language",   "Changes the language ImHex uses",                hex::plugin::builtin::handleLanguageCommand         },
 
     { "open",       "Open files passed as argument. [default]",     hex::plugin::builtin::handleOpenCommand             },
 
@@ -70,7 +71,7 @@ IMHEX_PLUGIN_SUBCOMMANDS() {
     { "magic",      "Identify file types",                          hex::plugin::builtin::handleMagicCommand            },
     { "pl",         "Interact with the pattern language",           hex::plugin::builtin::handlePatternLanguageCommand  },
     { "hexdump",    "Generate a hex dump of the provided file",     hex::plugin::builtin::handleHexdumpCommand          },
-    { "hexdump",    "Demangle a mangled symbol",                    hex::plugin::builtin::handleDemangleCommand         },
+    { "demangle",   "Demangle a mangled symbol",                    hex::plugin::builtin::handleDemangleCommand         },
 };
 
 IMHEX_PLUGIN_SETUP("Built-in", "WerWolv", "Default ImHex functionality") {