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x11: Add keymap support 

XkbKeycodeToKeySym is replaced with XkbLookupKeySym, which can take the modifier states. The associated cmake check has been renamed for consistency.

Only the XKB path is currently handled. The deprecated XKeycodeToKeysym path is TODO.
This commit is contained in:
Frank Praznik 2024-06-22 19:09:50 -04:00
parent c874a78ffb
commit 974bbea20b
9 changed files with 87 additions and 72 deletions
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2
cmake/sdlchecks.cmake
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@ -371,7 +371,7 @@ macro(CheckX11)
set(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS 1)
endif()
check_symbol_exists(XkbKeycodeToKeysym "X11/Xlib.h;X11/XKBlib.h" SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM)
check_symbol_exists(XkbLookupKeySym "X11/Xlib.h;X11/XKBlib.h" SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM)
if(SDL_X11_XCURSOR AND HAVE_XCURSOR_H AND XCURSOR_LIB)
set(HAVE_X11_XCURSOR TRUE)

2
include/build_config/SDL_build_config.h.cmake
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@ -400,7 +400,7 @@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 @SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR @SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS @SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS@
#cmakedefine SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM @SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM@
#cmakedefine SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM @SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM@
#cmakedefine SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS @SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS@
#cmakedefine SDL_VIDEO_DRIVER_X11_XCURSOR @SDL_VIDEO_DRIVER_X11_XCURSOR@
#cmakedefine SDL_VIDEO_DRIVER_X11_XDBE @SDL_VIDEO_DRIVER_X11_XDBE@

2
include/build_config/SDL_build_config_macos.h
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@ -194,7 +194,7 @@
#define SDL_VIDEO_DRIVER_X11_XRANDR 1
#define SDL_VIDEO_DRIVER_X11_XSCRNSAVER 1
#define SDL_VIDEO_DRIVER_X11_XSHAPE 1
#define SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM 1
#define SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM 1
#ifdef MAC_OS_X_VERSION_10_8
/*

2
src/video/x11/SDL_x11dyn.h
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@ -28,7 +28,7 @@
#include <X11/Xatom.h>
#include <X11/Xresource.h>
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
#include <X11/XKBlib.h>
#endif

1
src/video/x11/SDL_x11events.c
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@ -1131,6 +1131,7 @@ static void X11_DispatchEvent(SDL_VideoDevice *_this, XEvent *xevent)
printf("window %p: KeymapNotify!\n", data);
#endif
if (SDL_GetKeyboardFocus() != NULL) {
X11_UpdateKeymap(_this, SDL_TRUE);
X11_ReconcileKeyboardState(_this);
}
} else if (xevent->type == MappingNotify) {

76
src/video/x11/SDL_x11keyboard.c
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@ -72,7 +72,7 @@ static SDL_bool X11_ScancodeIsRemappable(SDL_Scancode scancode)
/* This function only correctly maps letters and numbers for keyboards in US QWERTY layout */
static SDL_Scancode X11_KeyCodeToSDLScancode(SDL_VideoDevice *_this, KeyCode keycode)
{
const KeySym keysym = X11_KeyCodeToSym(_this, keycode, 0);
const KeySym keysym = X11_KeyCodeToSym(_this, keycode, 0, 0);
if (keysym == NoSymbol) {
return SDL_SCANCODE_UNKNOWN;
@ -81,24 +81,15 @@ static SDL_Scancode X11_KeyCodeToSDLScancode(SDL_VideoDevice *_this, KeyCode key
return SDL_GetScancodeFromKeySym(keysym, keycode);
}
static Uint32 X11_KeyCodeToUcs4(SDL_VideoDevice *_this, KeyCode keycode, unsigned char group)
{
KeySym keysym = X11_KeyCodeToSym(_this, keycode, group);
if (keysym == NoSymbol) {
return 0;
}
return SDL_KeySymToUcs4(keysym);
}
KeySym
X11_KeyCodeToSym(SDL_VideoDevice *_this, KeyCode keycode, unsigned char group)
KeySym X11_KeyCodeToSym(SDL_VideoDevice *_this, KeyCode keycode, unsigned char group, unsigned int mod_mask)
{
SDL_VideoData *data = _this->driverdata;
KeySym keysym;
unsigned int mods_ret[16];
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
SDL_zero(mods_ret);
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
if (data->xkb) {
int num_groups = XkbKeyNumGroups(data->xkb, keycode);
unsigned char info = XkbKeyGroupInfo(data->xkb, keycode);
@ -118,13 +109,16 @@ X11_KeyCodeToSym(SDL_VideoDevice *_this, KeyCode keycode, unsigned char group)
group %= num_groups;
}
}
keysym = X11_XkbKeycodeToKeysym(data->display, keycode, group, 0);
} else {
if (X11_XkbLookupKeySym(data->display, keycode, XkbBuildCoreState(mod_mask, group), mods_ret, &keysym) == NoSymbol) {
keysym = NoSymbol;
}
} else
#endif
{
/* TODO: Handle groups and modifiers on the legacy path. */
keysym = X11_XKeycodeToKeysym(data->display, keycode, 0);
}
#else
keysym = X11_XKeycodeToKeysym(data->display, keycode, 0);
#endif
return keysym;
}
@ -153,7 +147,7 @@ int X11_InitKeyboard(SDL_VideoDevice *_this)
int distance;
Bool xkb_repeat = 0;
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
{
int xkb_major = XkbMajorVersion;
int xkb_minor = XkbMinorVersion;
@ -334,6 +328,21 @@ int X11_InitKeyboard(SDL_VideoDevice *_this)
void X11_UpdateKeymap(SDL_VideoDevice *_this, SDL_bool send_event)
{
struct Keymod_masks
{
SDL_Keymod sdl_mask;
unsigned int xkb_mask;
} const keymod_masks[] = {
{ SDL_KMOD_NONE, 0 },
{ SDL_KMOD_SHIFT, ShiftMask },
{ SDL_KMOD_CAPS, LockMask },
{ SDL_KMOD_SHIFT | SDL_KMOD_CAPS, ShiftMask | LockMask },
{ SDL_KMOD_MODE, Mod5Mask },
{ SDL_KMOD_MODE | SDL_KMOD_SHIFT, Mod5Mask | ShiftMask },
{ SDL_KMOD_MODE | SDL_KMOD_CAPS, Mod5Mask | LockMask },
{ SDL_KMOD_MODE | SDL_KMOD_SHIFT | SDL_KMOD_CAPS, Mod5Mask | ShiftMask | LockMask }
};
SDL_VideoData *data = _this->driverdata;
int i;
SDL_Scancode scancode;
@ -342,7 +351,7 @@ void X11_UpdateKeymap(SDL_VideoDevice *_this, SDL_bool send_event)
keymap = SDL_CreateKeymap();
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
if (data->xkb) {
XkbStateRec state;
X11_XkbGetUpdatedMap(data->display, XkbAllClientInfoMask, data->xkb);
@ -353,9 +362,8 @@ void X11_UpdateKeymap(SDL_VideoDevice *_this, SDL_bool send_event)
}
#endif
// FIXME: Need to get the mapping for all modifiers, not just the first one
for (int m = 0; m < SDL_arraysize(keymod_masks); ++m) {
for (i = 0; i < SDL_arraysize(data->key_layout); i++) {
Uint32 key;
SDL_Keycode keycode;
/* Make sure this is a valid scancode */
@ -364,12 +372,17 @@ void X11_UpdateKeymap(SDL_VideoDevice *_this, SDL_bool send_event)
continue;
}
/* See if there is a UCS keycode for this scancode */
key = X11_KeyCodeToUcs4(_this, (KeyCode)i, group);
if (key) {
keycode = (SDL_Keycode)key;
KeySym keysym = X11_KeyCodeToSym(_this, i, group, keymod_masks[m].xkb_mask);
/* Note: The default SDL scancode table sets this to right alt instead of AltGr/Mode, so handle it separately. */
if (keysym != XK_ISO_Level3_Shift) {
keycode = SDL_KeySymToUcs4(keysym);
} else {
SDL_Scancode keyScancode = X11_KeyCodeToSDLScancode(_this, (KeyCode)i);
keycode = SDLK_MODE;
}
if (!keycode) {
SDL_Scancode keyScancode = SDL_GetScancodeFromKeySym(keysym, (KeyCode)i);
switch (keyScancode) {
case SDL_SCANCODE_UNKNOWN:
@ -395,7 +408,8 @@ void X11_UpdateKeymap(SDL_VideoDevice *_this, SDL_bool send_event)
break;
}
}
SDL_SetKeymapEntry(keymap, scancode, SDL_KMOD_NONE, keycode);
SDL_SetKeymapEntry(keymap, scancode, keymod_masks[m].sdl_mask, keycode);
}
}
SDL_SetKeymap(keymap, send_event);
}
@ -404,7 +418,7 @@ void X11_QuitKeyboard(SDL_VideoDevice *_this)
{
SDL_VideoData *data = _this->driverdata;
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
if (data->xkb) {
X11_XkbFreeKeyboard(data->xkb, 0, True);
data->xkb = NULL;

2
src/video/x11/SDL_x11keyboard.h
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@ -33,6 +33,6 @@ extern SDL_bool X11_HasScreenKeyboardSupport(SDL_VideoDevice *_this);
extern void X11_ShowScreenKeyboard(SDL_VideoDevice *_this, SDL_Window *window);
extern void X11_HideScreenKeyboard(SDL_VideoDevice *_this, SDL_Window *window);
extern SDL_bool X11_IsScreenKeyboardShown(SDL_VideoDevice *_this, SDL_Window *window);
extern KeySym X11_KeyCodeToSym(SDL_VideoDevice *_this, KeyCode, unsigned char group);
extern KeySym X11_KeyCodeToSym(SDL_VideoDevice *_this, KeyCode, unsigned char group, unsigned int mod_mask);
#endif /* SDL_x11keyboard_h_ */

6
src/video/x11/SDL_x11sym.h
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@ -178,12 +178,12 @@ SDL_X11_SYM(Bool,XGetEventData,(Display* a,XGenericEventCookie* b),(a,b),return)
SDL_X11_SYM(void,XFreeEventData,(Display* a,XGenericEventCookie* b),(a,b),)
#endif
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
SDL_X11_SYM(Bool,XkbQueryExtension,(Display* a,int * b,int * c,int * d,int * e, int *f),(a,b,c,d,e,f),return)
#if NeedWidePrototypes
SDL_X11_SYM(KeySym,XkbKeycodeToKeysym,(Display* a,unsigned int b,int c,int d),(a,b,c,d),return)
SDL_X11_SYM(Bool,XkbLookupKeySym,(Display* a, unsigned int b, unsigned int c, unsigned int* d, KeySym* e),(a,b,c,d,e),return)
#else
SDL_X11_SYM(KeySym,XkbKeycodeToKeysym,(Display* a,KeyCode b,int c,int d),(a,b,c,d),return)
SDL_X11_SYM(Bool,XkbLookupKeySym,(Display* a, KeyCode b, unsigned int c, unsigned int* d, KeySym* e),(a,b,c,d,e),return)
#endif
SDL_X11_SYM(Status,XkbGetState,(Display* a,unsigned int b,XkbStatePtr c),(a,b,c),return)
SDL_X11_SYM(Status,XkbGetUpdatedMap,(Display* a,unsigned int b,XkbDescPtr c),(a,b,c),return)

2
src/video/x11/SDL_x11video.h
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@ -121,7 +121,7 @@ struct SDL_VideoData
int xrandr_event_base;
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
#ifdef SDL_VIDEO_DRIVER_X11_HAS_XKBLOOKUPKEYSYM
XkbDescPtr xkb;
#endif
int xkb_event;