Improve the language bar right-click menu.

server/src/settings/settings_app.cpp

@@ -33,6 +33,7 @@ constexpr wchar_t kWindowClass[] = L"MetasequoiaImeSettingsWindow";
 constexpr wchar_t kWindowTitle[] = L"Metasequoia IME Settings";
 constexpr wchar_t kSingleInstanceMutex[] = L"Local\\MetasequoiaImeSettings.SingleInstance";
 constexpr UINT kActivateExistingWindow = WM_APP + 1;
+constexpr UINT kOpenAboutSection = WM_APP + 2;
 constexpr UINT_PTR kConfigReloadTimer = 1;
 
 ComPtr<ICoreWebView2Controller> g_controller;
@@ -48,6 +49,29 @@ bool g_has_maximize_button_rect = false;
 bool g_maximize_button_hover = false;
 bool g_window_active = true;
 bool g_window_minimized = false;
+bool g_open_about_on_ready = false;
+
+void ShowAboutSection()
+{
+    if (!g_webview) return;
+    g_webview->ExecuteScript(LR"JS((() => {
+        const selectAbout = () => {
+            const item = document.querySelector('.sidebar .item[data-target="about-settings"]');
+            if (!item) return false;
+            if (!item.classList.contains('active')) item.click();
+            const section = document.getElementById('about-settings');
+            if (!item.classList.contains('active') || !section || getComputedStyle(section).display === 'none')
+                return false;
+            item.scrollIntoView({ block: 'nearest' });
+            return true;
+        };
+        if (selectAbout()) return;
+        const retry = setInterval(() => {
+            if (selectAbout()) clearInterval(retry);
+        }, 50);
+        setTimeout(() => clearInterval(retry), 10000);
+    })())JS", nullptr);
+}
 
 void ApplyWindowActivationAppearance()
 {
@@ -440,6 +464,11 @@ HRESULT OnControllerCreated(HWND hwnd, HRESULT result, ICoreWebView2CompositionC
                     PostConfig();
                     ApplyWindowActivationAppearance();
                     SetFocus(hwnd);
+                    if (g_open_about_on_ready)
+                    {
+                        ShowAboutSection();
+                        g_open_about_on_ready = false;
+                    }
                 }
                 return S_OK;
             }).Get(),
@@ -560,6 +589,10 @@ LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM w_param, LPARAM l_pa
     case kActivateExistingWindow:
         ActivateWindow(hwnd);
         return 0;
+    case kOpenAboutSection:
+        ActivateWindow(hwnd);
+        ShowAboutSection();
+        return 0;
     case WM_NCCALCSIZE:
         if (w_param)
         {
@@ -691,8 +724,9 @@ LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM w_param, LPARAM l_pa
 }
 } // namespace
 
-int WINAPI wWinMain(HINSTANCE instance, HINSTANCE, PWSTR, int show_command)
+int WINAPI wWinMain(HINSTANCE instance, HINSTANCE, PWSTR command_line, int show_command)
 {
+    g_open_about_on_ready = command_line && std::wstring(command_line).find(L"--about") != std::wstring::npos;
     SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
     const HRESULT com_result = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
     if (FAILED(com_result)) return 1;
@@ -704,7 +738,7 @@ int WINAPI wWinMain(HINSTANCE instance, HINSTANCE, PWSTR, int show_command)
         HWND existing = FindWindowW(kWindowClass, nullptr);
         if (existing)
         {
-            PostMessageW(existing, kActivateExistingWindow, 0, 0);
+            PostMessageW(existing, g_open_about_on_ready ? kOpenAboutSection : kActivateExistingWindow, 0, 0);
             SetForegroundWindow(existing);
         }
         return 0;

server/src/settings/settings_launcher.cpp

@@ -11,6 +11,7 @@ constexpr wchar_t kSettingsWindowClass[] = L"MetasequoiaImeSettingsWindow";
 constexpr wchar_t kEmojiPanelWindowClass[] = L"msimeui.EmojiPanel";
 constexpr wchar_t kKeyboardPanelWindowClass[] = L"msimeui.KeyboardDemo";
 constexpr wchar_t kHandwritingPanelWindowClass[] = L"msimeui.HandwritingDemo";
+constexpr UINT kOpenSettingsAbout = WM_APP + 2;
 
 bool OpenSiblingApplication(const wchar_t *executable_name, const wchar_t *window_class)
 {
@@ -50,6 +51,27 @@ bool OpenSettingsApplication()
     return OpenSiblingApplication(L"MetasequoiaImeSettings.exe", kSettingsWindowClass);
 }
 
+bool OpenSettingsAboutApplication()
+{
+    if (const HWND existing_window = FindWindowW(kSettingsWindowClass, nullptr))
+    {
+        ShowWindow(existing_window, SW_SHOWNORMAL);
+        PostMessageW(existing_window, kOpenSettingsAbout, 0, 0);
+        return SetForegroundWindow(existing_window) != FALSE;
+    }
+
+    std::wstring module_path(32768, L'\0');
+    const DWORD length = GetModuleFileNameW(nullptr, module_path.data(), static_cast<DWORD>(module_path.size()));
+    if (length == 0 || length >= module_path.size()) return false;
+    module_path.resize(length);
+
+    const std::filesystem::path application_path =
+        std::filesystem::path(module_path).parent_path() / L"MetasequoiaImeSettings.exe";
+    const HINSTANCE result = ShellExecuteW(nullptr, L"open", application_path.c_str(), L"--about",
+                                           application_path.parent_path().c_str(), SW_SHOWNORMAL);
+    return reinterpret_cast<INT_PTR>(result) > 32;
+}
+
 bool CloseSettingsApplication()
 {
     return CloseApplication(kSettingsWindowClass);

server/src/settings/settings_launcher.h

@@ -1,6 +1,7 @@
 #pragma once
 
 bool OpenSettingsApplication();
+bool OpenSettingsAboutApplication();
 bool CloseSettingsApplication();
 bool OpenEmojiPanelApplication();
 bool CloseEmojiPanelApplication();

server/src/webview2/windows_webview2.cpp

@@ -801,6 +801,11 @@ HRESULT OnControllerCreatedMenuWnd(     //
                         OpenSettingsApplication();
                         ShowWindow(::global_hwnd_menu, SW_HIDE);
                     }
+                    else if (type == "about")
+                    {
+                        OpenSettingsAboutApplication();
+                        ShowWindow(::global_hwnd_menu, SW_HIDE);
+                    }
                     else if (type == "emojiSymbols")
                     {
                         OpenEmojiPanelApplication();