diff options
Diffstat (limited to 'src/w32fns.c')
| -rw-r--r-- | src/w32fns.c | 158 |
1 files changed, 155 insertions, 3 deletions
diff --git a/src/w32fns.c b/src/w32fns.c index 14d1154a2bc..02a6d78b51c 100644 --- a/src/w32fns.c +++ b/src/w32fns.c @@ -73,6 +73,20 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */ #include <imm.h> #include <windowsx.h> +/* + Internal/undocumented constants for Windows Dark mode. + See: https://github.com/microsoft/WindowsAppSDK/issues/41 +*/ +#define DARK_MODE_APP_NAME L"DarkMode_Explorer" +/* For Windows 10 version 1809, 1903, 1909. */ +#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE_OLD +#define DWMWA_USE_IMMERSIVE_DARK_MODE_OLD 19 +#endif +/* For Windows 10 version 2004 and higher, and Windows 11. */ +#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE +#define DWMWA_USE_IMMERSIVE_DARK_MODE 20 +#endif + #ifndef FOF_NO_CONNECTED_ELEMENTS #define FOF_NO_CONNECTED_ELEMENTS 0x2000 #endif @@ -185,6 +199,11 @@ typedef BOOL (WINAPI *IsDebuggerPresent_Proc) (void); typedef HRESULT (WINAPI *SetThreadDescription_Proc) (HANDLE hThread, PCWSTR lpThreadDescription); +typedef HRESULT (WINAPI * SetWindowTheme_Proc) + (IN HWND hwnd, IN LPCWSTR pszSubAppName, IN LPCWSTR pszSubIdList); +typedef HRESULT (WINAPI * DwmSetWindowAttribute_Proc) + (HWND hwnd, DWORD dwAttribute, IN LPCVOID pvAttribute, DWORD cbAttribute); + TrackMouseEvent_Proc track_mouse_event_fn = NULL; ImmGetCompositionString_Proc get_composition_string_fn = NULL; ImmGetContext_Proc get_ime_context_fn = NULL; @@ -199,6 +218,8 @@ EnumDisplayMonitors_Proc enum_display_monitors_fn = NULL; GetTitleBarInfo_Proc get_title_bar_info_fn = NULL; IsDebuggerPresent_Proc is_debugger_present = NULL; SetThreadDescription_Proc set_thread_description = NULL; +SetWindowTheme_Proc SetWindowTheme_fn = NULL; +DwmSetWindowAttribute_Proc DwmSetWindowAttribute_fn = NULL; extern AppendMenuW_Proc unicode_append_menu; @@ -252,6 +273,9 @@ int w32_major_version; int w32_minor_version; int w32_build_number; +/* If the OS is set to use dark mode. */ +BOOL w32_darkmode = FALSE; + /* Distinguish between Windows NT and Windows 95. */ int os_subtype; @@ -2279,10 +2303,36 @@ w32_init_class (HINSTANCE hinst) } } +/* Applies the Windows system theme (light or dark) to the window + handle HWND. */ +static void +w32_applytheme (HWND hwnd) +{ + if (w32_darkmode) + { + /* Set window theme to that of a built-in Windows app (Explorer), + because it has dark scroll bars and other UI elements. */ + if (SetWindowTheme_fn) + SetWindowTheme_fn (hwnd, DARK_MODE_APP_NAME, NULL); + + /* Set the titlebar to system dark mode. */ + if (DwmSetWindowAttribute_fn) + { + /* Windows 10 version 2004 and up, Windows 11. */ + DWORD attr = DWMWA_USE_IMMERSIVE_DARK_MODE; + /* Windows 10 older than 2004. */ + if (w32_build_number < 19041) + attr = DWMWA_USE_IMMERSIVE_DARK_MODE_OLD; + DwmSetWindowAttribute_fn (hwnd, attr, + &w32_darkmode, sizeof (w32_darkmode)); + } + } +} + static HWND w32_createvscrollbar (struct frame *f, struct scroll_bar * bar) { - return CreateWindow ("SCROLLBAR", "", + HWND hwnd = CreateWindow ("SCROLLBAR", "", /* Clip siblings so we don't draw over child frames. Apparently this is not always sufficient so we also try to make bar windows @@ -2291,12 +2341,15 @@ w32_createvscrollbar (struct frame *f, struct scroll_bar * bar) /* Position and size of scroll bar. */ bar->left, bar->top, bar->width, bar->height, FRAME_W32_WINDOW (f), NULL, hinst, NULL); + if (hwnd) + w32_applytheme (hwnd); + return hwnd; } static HWND w32_createhscrollbar (struct frame *f, struct scroll_bar * bar) { - return CreateWindow ("SCROLLBAR", "", + HWND hwnd = CreateWindow ("SCROLLBAR", "", /* Clip siblings so we don't draw over child frames. Apparently this is not always sufficient so we also try to make bar windows @@ -2305,6 +2358,9 @@ w32_createhscrollbar (struct frame *f, struct scroll_bar * bar) /* Position and size of scroll bar. */ bar->left, bar->top, bar->width, bar->height, FRAME_W32_WINDOW (f), NULL, hinst, NULL); + if (hwnd) + w32_applytheme (hwnd); + return hwnd; } static void @@ -2390,6 +2446,9 @@ w32_createwindow (struct frame *f, int *coords) /* Enable drag-n-drop. */ DragAcceptFiles (hwnd, TRUE); + /* Enable system light/dark theme. */ + w32_applytheme (hwnd); + /* Do this to discard the default setting specified by our parent. */ ShowWindow (hwnd, SW_HIDE); @@ -5114,6 +5173,13 @@ w32_wnd_proc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) my_post_msg (&wmsg, hwnd, msg, wParam, lParam); goto dflt; + case WM_SETTINGCHANGE: + /* Inform the Lisp thread that some system-wide setting has + changed, so if Emacs is interested in some of them, it could + update its internal values. */ + my_post_msg (&wmsg, hwnd, msg, wParam, lParam); + goto dflt; + case WM_SETFOCUS: dpyinfo->faked_key = 0; reset_modifiers (); @@ -7459,7 +7525,8 @@ DEFUN ("x-show-tip", Fx_show_tip, Sx_show_tip, 1, 6, 0, try_window (window, pos, TRY_WINDOW_IGNORE_FONTS_CHANGE); /* Calculate size of tooltip window. */ size = Fwindow_text_pixel_size (window, Qnil, Qnil, Qnil, - make_fixnum (w->pixel_height), Qnil); + make_fixnum (w->pixel_height), Qnil, + Qnil); /* Add the frame's internal border to calculated size. */ width = XFIXNUM (Fcar (size)) + 2 * FRAME_INTERNAL_BORDER_WIDTH (tip_f); height = XFIXNUM (Fcdr (size)) + 2 * FRAME_INTERNAL_BORDER_WIDTH (tip_f); @@ -10257,6 +10324,60 @@ to be converted to forward slashes by the caller. */) } #endif /* WINDOWSNT */ + +/* Query a value from the Windows Registry (under HKCU and HKLM), + where `key` is the registry key, `name` is the name, and `lpdwtype` + is a pointer to the return value's type. `lpwdtype` can be NULL if + you do not care about the type. + + Returns: pointer to the value, or null pointer if the key/name does + not exist. */ +LPBYTE +w32_get_resource (const char *key, const char *name, LPDWORD lpdwtype) +{ + LPBYTE lpvalue; + HKEY hrootkey = NULL; + DWORD cbData; + + /* Check both the current user and the local machine to see if + we have any resources. */ + + if (RegOpenKeyEx (HKEY_CURRENT_USER, key, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) + { + lpvalue = NULL; + + if (RegQueryValueEx (hrootkey, name, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS + && (lpvalue = xmalloc (cbData)) != NULL + && RegQueryValueEx (hrootkey, name, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) + { + RegCloseKey (hrootkey); + return (lpvalue); + } + + xfree (lpvalue); + + RegCloseKey (hrootkey); + } + + if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) + { + lpvalue = NULL; + + if (RegQueryValueEx (hrootkey, name, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS + && (lpvalue = xmalloc (cbData)) != NULL + && RegQueryValueEx (hrootkey, name, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) + { + RegCloseKey (hrootkey); + return (lpvalue); + } + + xfree (lpvalue); + + RegCloseKey (hrootkey); + } + + return (NULL); +} /*********************************************************************** Initialization @@ -11028,6 +11149,37 @@ globals_of_w32fns (void) set_thread_description = (SetThreadDescription_Proc) get_proc_addr (hm_kernel32, "SetThreadDescription"); + /* Support OS dark mode on Windows 10 version 1809 and higher. + See `w32_applytheme` which uses appropriate APIs per version of Windows. + For future wretches who may need to understand Windows build numbers: + https://docs.microsoft.com/en-us/windows/release-health/release-information + */ + if (os_subtype == OS_SUBTYPE_NT + && w32_major_version >= 10 && w32_build_number >= 17763) + { + /* Load dwmapi.dll and uxtheme.dll, which will be needed to set + window themes. */ + HMODULE dwmapi_lib = LoadLibrary("dwmapi.dll"); + DwmSetWindowAttribute_fn = (DwmSetWindowAttribute_Proc) + get_proc_addr (dwmapi_lib, "DwmSetWindowAttribute"); + HMODULE uxtheme_lib = LoadLibrary("uxtheme.dll"); + SetWindowTheme_fn = (SetWindowTheme_Proc) + get_proc_addr (uxtheme_lib, "SetWindowTheme"); + + /* Check Windows Registry for system theme and set w32_darkmode. + TODO: "Nice to have" would be to create a lisp setting (which + defaults to this Windows Registry value), then read that lisp + value here instead. This would allow the user to forcibly + override the system theme (which is also user-configurable in + Windows settings; see MS-Windows section in Emacs manual). */ + LPBYTE val = + w32_get_resource ("Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize", + "AppsUseLightTheme", + NULL); + if (val && *val == 0) + w32_darkmode = TRUE; + } + except_code = 0; except_addr = 0; #ifndef CYGWIN |