libobs: Add linux hotkey implementation

libobs/obs-nix.c

@@ -24,6 +24,11 @@
 #endif
 #include <sys/sysinfo.h>
 #include <sys/utsname.h>
+#include <xcb/xcb.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xlib-xcb.h>
+#include <X11/keysym.h>
 #include <inttypes.h>
 #include "util/dstr.h"
 #include "obs-internal.h"
@@ -228,53 +233,734 @@ void log_system_info(void)
 #endif
 }
 
+/* So here's how linux works with key mapping:
+ *
+ * First, there's a global key symbol enum (xcb_keysym_t) which has unique
+ * values for all possible symbols keys can have (e.g., '1' and '!' are
+ * different values).
+ *
+ * Then there's a key code (xcb_keycode_t), which is basically an index to the
+ * actual key itself on the keyboard (e.g., '1' and '!' will share the same
+ * value).
+ *
+ * xcb_keysym_t values should be given to libobs, and libobs will translate it
+ * to an obs_key_t, and although xcb_keysym_t can differ ('!' vs '1'), it will
+ * get the obs_key_t value that represents the actual key pressed; in other
+ * words it will be based on the key code rather than the key symbol.  The same
+ * applies to checking key press states.
+ */
+
+struct keycode_list {
+	DARRAY(xcb_keycode_t) list;
+};
 
 struct obs_hotkeys_platform {
+	Display *display;
+	xcb_keysym_t base_keysyms[OBS_KEY_LAST_VALUE];
+	struct keycode_list keycodes[OBS_KEY_LAST_VALUE];
+	xcb_keycode_t min_keycode;
+	xcb_keycode_t super_l_code;
+	xcb_keycode_t super_r_code;
+
+	/* stores a copy of the keysym map for keycodes */
+	xcb_keysym_t *keysyms;
+	int num_keysyms;
+	int syms_per_code;
 };
 
+#define MOUSE_1 (1<<16)
+#define MOUSE_2 (2<<16)
+#define MOUSE_3 (3<<16)
+#define MOUSE_4 (4<<16)
+#define MOUSE_5 (5<<16)
+
+static int get_keysym(obs_key_t key)
+{
+	switch (key) {
+	case OBS_KEY_RETURN: return XK_Return;
+	case OBS_KEY_ESCAPE: return XK_Escape;
+	case OBS_KEY_TAB: return XK_Tab;
+	case OBS_KEY_BACKSPACE: return XK_BackSpace;
+	case OBS_KEY_INSERT: return XK_Insert;
+	case OBS_KEY_DELETE: return XK_Delete;
+	case OBS_KEY_PAUSE: return XK_Pause;
+	case OBS_KEY_PRINT: return XK_Print;
+	case OBS_KEY_HOME: return XK_Home;
+	case OBS_KEY_END: return XK_End;
+	case OBS_KEY_LEFT: return XK_Left;
+	case OBS_KEY_UP: return XK_Up;
+	case OBS_KEY_RIGHT: return XK_Right;
+	case OBS_KEY_DOWN: return XK_Down;
+	case OBS_KEY_PAGEUP: return XK_Prior;
+	case OBS_KEY_PAGEDOWN: return XK_Next;
+
+	case OBS_KEY_SHIFT: return XK_Shift_L;
+	case OBS_KEY_CONTROL: return XK_Control_L;
+	case OBS_KEY_ALT: return XK_Alt_L;
+	case OBS_KEY_CAPSLOCK: return XK_Caps_Lock;
+	case OBS_KEY_NUMLOCK: return XK_Num_Lock;
+	case OBS_KEY_SCROLLLOCK: return XK_Scroll_Lock;
+
+	case OBS_KEY_F1: return XK_F1;
+	case OBS_KEY_F2: return XK_F2;
+	case OBS_KEY_F3: return XK_F3;
+	case OBS_KEY_F4: return XK_F4;
+	case OBS_KEY_F5: return XK_F5;
+	case OBS_KEY_F6: return XK_F6;
+	case OBS_KEY_F7: return XK_F7;
+	case OBS_KEY_F8: return XK_F8;
+	case OBS_KEY_F9: return XK_F9;
+	case OBS_KEY_F10: return XK_F10;
+	case OBS_KEY_F11: return XK_F11;
+	case OBS_KEY_F12: return XK_F12;
+	case OBS_KEY_F13: return XK_F13;
+	case OBS_KEY_F14: return XK_F14;
+	case OBS_KEY_F15: return XK_F15;
+	case OBS_KEY_F16: return XK_F16;
+	case OBS_KEY_F17: return XK_F17;
+	case OBS_KEY_F18: return XK_F18;
+	case OBS_KEY_F19: return XK_F19;
+	case OBS_KEY_F20: return XK_F20;
+	case OBS_KEY_F21: return XK_F21;
+	case OBS_KEY_F22: return XK_F22;
+	case OBS_KEY_F23: return XK_F23;
+	case OBS_KEY_F24: return XK_F24;
+
+	case OBS_KEY_MENU: return XK_Menu;
+	case OBS_KEY_HYPER_L: return XK_Hyper_L;
+	case OBS_KEY_HYPER_R: return XK_Hyper_R;
+	case OBS_KEY_HELP: return XK_Help;
+	case OBS_KEY_SPACE: return XK_space;
+
+	case OBS_KEY_EXCLAM: return XK_exclam;
+	case OBS_KEY_QUOTEDBL: return XK_quotedbl;
+	case OBS_KEY_NUMBERSIGN: return XK_numbersign;
+	case OBS_KEY_DOLLAR: return XK_dollar;
+	case OBS_KEY_PERCENT: return XK_percent;
+	case OBS_KEY_AMPERSAND: return XK_ampersand;
+	case OBS_KEY_APOSTROPHE: return XK_apostrophe;
+	case OBS_KEY_PARENLEFT: return XK_parenleft;
+	case OBS_KEY_PARENRIGHT: return XK_parenright;
+	case OBS_KEY_ASTERISK: return XK_asterisk;
+	case OBS_KEY_PLUS: return XK_plus;
+	case OBS_KEY_COMMA: return XK_comma;
+	case OBS_KEY_MINUS: return XK_minus;
+	case OBS_KEY_PERIOD: return XK_period;
+	case OBS_KEY_SLASH: return XK_slash;
+	case OBS_KEY_0: return XK_0;
+	case OBS_KEY_1: return XK_1;
+	case OBS_KEY_2: return XK_2;
+	case OBS_KEY_3: return XK_3;
+	case OBS_KEY_4: return XK_4;
+	case OBS_KEY_5: return XK_5;
+	case OBS_KEY_6: return XK_6;
+	case OBS_KEY_7: return XK_7;
+	case OBS_KEY_8: return XK_8;
+	case OBS_KEY_9: return XK_9;
+	case OBS_KEY_NUMEQUAL: return XK_KP_Equal;
+	case OBS_KEY_NUMASTERISK: return XK_KP_Multiply;
+	case OBS_KEY_NUMPLUS: return XK_KP_Add;
+	case OBS_KEY_NUMCOMMA: return XK_KP_Separator;
+	case OBS_KEY_NUMMINUS: return XK_KP_Subtract;
+	case OBS_KEY_NUMPERIOD: return XK_KP_Decimal;
+	case OBS_KEY_NUMSLASH: return XK_KP_Divide;
+	case OBS_KEY_NUM0: return XK_KP_0;
+	case OBS_KEY_NUM1: return XK_KP_1;
+	case OBS_KEY_NUM2: return XK_KP_2;
+	case OBS_KEY_NUM3: return XK_KP_3;
+	case OBS_KEY_NUM4: return XK_KP_4;
+	case OBS_KEY_NUM5: return XK_KP_5;
+	case OBS_KEY_NUM6: return XK_KP_6;
+	case OBS_KEY_NUM7: return XK_KP_7;
+	case OBS_KEY_NUM8: return XK_KP_8;
+	case OBS_KEY_NUM9: return XK_KP_9;
+	case OBS_KEY_COLON: return XK_colon;
+	case OBS_KEY_SEMICOLON: return XK_semicolon;
+	case OBS_KEY_LESS: return XK_less;
+	case OBS_KEY_EQUAL: return XK_equal;
+	case OBS_KEY_GREATER: return XK_greater;
+	case OBS_KEY_QUESTION: return XK_question;
+	case OBS_KEY_AT: return XK_at;
+	case OBS_KEY_A: return XK_A;
+	case OBS_KEY_B: return XK_B;
+	case OBS_KEY_C: return XK_C;
+	case OBS_KEY_D: return XK_D;
+	case OBS_KEY_E: return XK_E;
+	case OBS_KEY_F: return XK_F;
+	case OBS_KEY_G: return XK_G;
+	case OBS_KEY_H: return XK_H;
+	case OBS_KEY_I: return XK_I;
+	case OBS_KEY_J: return XK_J;
+	case OBS_KEY_K: return XK_K;
+	case OBS_KEY_L: return XK_L;
+	case OBS_KEY_M: return XK_M;
+	case OBS_KEY_N: return XK_N;
+	case OBS_KEY_O: return XK_O;
+	case OBS_KEY_P: return XK_P;
+	case OBS_KEY_Q: return XK_Q;
+	case OBS_KEY_R: return XK_R;
+	case OBS_KEY_S: return XK_S;
+	case OBS_KEY_T: return XK_T;
+	case OBS_KEY_U: return XK_U;
+	case OBS_KEY_V: return XK_V;
+	case OBS_KEY_W: return XK_W;
+	case OBS_KEY_X: return XK_X;
+	case OBS_KEY_Y: return XK_Y;
+	case OBS_KEY_Z: return XK_Z;
+	case OBS_KEY_BRACKETLEFT: return XK_bracketleft;
+	case OBS_KEY_BACKSLASH: return XK_backslash;
+	case OBS_KEY_BRACKETRIGHT: return XK_bracketright;
+	case OBS_KEY_ASCIICIRCUM: return XK_asciicircum;
+	case OBS_KEY_UNDERSCORE: return XK_underscore;
+	case OBS_KEY_QUOTELEFT: return XK_quoteleft;
+	case OBS_KEY_BRACELEFT: return XK_braceleft;
+	case OBS_KEY_BAR: return XK_bar;
+	case OBS_KEY_BRACERIGHT: return XK_braceright;
+	case OBS_KEY_ASCIITILDE: return XK_grave;
+	case OBS_KEY_NOBREAKSPACE: return XK_nobreakspace;
+	case OBS_KEY_EXCLAMDOWN: return XK_exclamdown;
+	case OBS_KEY_CENT: return XK_cent;
+	case OBS_KEY_STERLING: return XK_sterling;
+	case OBS_KEY_CURRENCY: return XK_currency;
+	case OBS_KEY_YEN: return XK_yen;
+	case OBS_KEY_BROKENBAR: return XK_brokenbar;
+	case OBS_KEY_SECTION: return XK_section;
+	case OBS_KEY_DIAERESIS: return XK_diaeresis;
+	case OBS_KEY_COPYRIGHT: return XK_copyright;
+	case OBS_KEY_ORDFEMININE: return XK_ordfeminine;
+	case OBS_KEY_GUILLEMOTLEFT: return XK_guillemotleft;
+	case OBS_KEY_NOTSIGN: return XK_notsign;
+	case OBS_KEY_HYPHEN: return XK_hyphen;
+	case OBS_KEY_REGISTERED: return XK_registered;
+	case OBS_KEY_MACRON: return XK_macron;
+	case OBS_KEY_DEGREE: return XK_degree;
+	case OBS_KEY_PLUSMINUS: return XK_plusminus;
+	case OBS_KEY_TWOSUPERIOR: return XK_twosuperior;
+	case OBS_KEY_THREESUPERIOR: return XK_threesuperior;
+	case OBS_KEY_ACUTE: return XK_acute;
+	case OBS_KEY_MU: return XK_mu;
+	case OBS_KEY_PARAGRAPH: return XK_paragraph;
+	case OBS_KEY_PERIODCENTERED: return XK_periodcentered;
+	case OBS_KEY_CEDILLA: return XK_cedilla;
+	case OBS_KEY_ONESUPERIOR: return XK_onesuperior;
+	case OBS_KEY_MASCULINE: return XK_masculine;
+	case OBS_KEY_GUILLEMOTRIGHT: return XK_guillemotright;
+	case OBS_KEY_ONEQUARTER: return XK_onequarter;
+	case OBS_KEY_ONEHALF: return XK_onehalf;
+	case OBS_KEY_THREEQUARTERS: return XK_threequarters;
+	case OBS_KEY_QUESTIONDOWN: return XK_questiondown;
+	case OBS_KEY_AGRAVE: return XK_Agrave;
+	case OBS_KEY_AACUTE: return XK_Aacute;
+	case OBS_KEY_ACIRCUMFLEX: return XK_Acircumflex;
+	case OBS_KEY_ATILDE: return XK_Atilde;
+	case OBS_KEY_ADIAERESIS: return XK_Adiaeresis;
+	case OBS_KEY_ARING: return XK_Aring;
+	case OBS_KEY_AE: return XK_AE;
+	case OBS_KEY_CCEDILLA: return XK_cedilla;
+	case OBS_KEY_EGRAVE: return XK_Egrave;
+	case OBS_KEY_EACUTE: return XK_Eacute;
+	case OBS_KEY_ECIRCUMFLEX: return XK_Ecircumflex;
+	case OBS_KEY_EDIAERESIS: return XK_Ediaeresis;
+	case OBS_KEY_IGRAVE: return XK_Igrave;
+	case OBS_KEY_IACUTE: return XK_Iacute;
+	case OBS_KEY_ICIRCUMFLEX: return XK_Icircumflex;
+	case OBS_KEY_IDIAERESIS: return XK_Idiaeresis;
+	case OBS_KEY_ETH: return XK_ETH;
+	case OBS_KEY_NTILDE: return XK_Ntilde;
+	case OBS_KEY_OGRAVE: return XK_Ograve;
+	case OBS_KEY_OACUTE: return XK_Oacute;
+	case OBS_KEY_OCIRCUMFLEX: return XK_Ocircumflex;
+	case OBS_KEY_ODIAERESIS: return XK_Odiaeresis;
+	case OBS_KEY_MULTIPLY: return XK_multiply;
+	case OBS_KEY_OOBLIQUE: return XK_Ooblique;
+	case OBS_KEY_UGRAVE: return XK_Ugrave;
+	case OBS_KEY_UACUTE: return XK_Uacute;
+	case OBS_KEY_UCIRCUMFLEX: return XK_Ucircumflex;
+	case OBS_KEY_UDIAERESIS: return XK_Udiaeresis;
+	case OBS_KEY_YACUTE: return XK_Yacute;
+	case OBS_KEY_THORN: return XK_Thorn;
+	case OBS_KEY_SSHARP: return XK_ssharp;
+	case OBS_KEY_DIVISION: return XK_division;
+	case OBS_KEY_YDIAERESIS: return XK_Ydiaeresis;
+	case OBS_KEY_MULTI_KEY: return XK_Multi_key;
+	case OBS_KEY_CODEINPUT: return XK_Codeinput;
+	case OBS_KEY_SINGLECANDIDATE: return XK_SingleCandidate;
+	case OBS_KEY_MULTIPLECANDIDATE: return XK_MultipleCandidate;
+	case OBS_KEY_PREVIOUSCANDIDATE: return XK_PreviousCandidate;
+	case OBS_KEY_MODE_SWITCH: return XK_Mode_switch;
+	case OBS_KEY_KANJI: return XK_Kanji;
+	case OBS_KEY_MUHENKAN: return XK_Muhenkan;
+	case OBS_KEY_HENKAN: return XK_Henkan;
+	case OBS_KEY_ROMAJI: return XK_Romaji;
+	case OBS_KEY_HIRAGANA: return XK_Hiragana;
+	case OBS_KEY_KATAKANA: return XK_Katakana;
+	case OBS_KEY_HIRAGANA_KATAKANA: return XK_Hiragana_Katakana;
+	case OBS_KEY_ZENKAKU: return XK_Zenkaku;
+	case OBS_KEY_HANKAKU: return XK_Hankaku;
+	case OBS_KEY_ZENKAKU_HANKAKU: return XK_Zenkaku_Hankaku;
+	case OBS_KEY_TOUROKU: return XK_Touroku;
+	case OBS_KEY_MASSYO: return XK_Massyo;
+	case OBS_KEY_KANA_LOCK: return XK_Kana_Lock;
+	case OBS_KEY_KANA_SHIFT: return XK_Kana_Shift;
+	case OBS_KEY_EISU_SHIFT: return XK_Eisu_Shift;
+	case OBS_KEY_EISU_TOGGLE: return XK_Eisu_toggle;
+	case OBS_KEY_HANGUL: return XK_Hangul;
+	case OBS_KEY_HANGUL_START: return XK_Hangul_Start;
+	case OBS_KEY_HANGUL_END: return XK_Hangul_End;
+	case OBS_KEY_HANGUL_HANJA: return XK_Hangul_Hanja;
+	case OBS_KEY_HANGUL_JAMO: return XK_Hangul_Jamo;
+	case OBS_KEY_HANGUL_ROMAJA: return XK_Hangul_Romaja;
+	case OBS_KEY_HANGUL_BANJA: return XK_Hangul_Banja;
+	case OBS_KEY_HANGUL_PREHANJA: return XK_Hangul_PreHanja;
+	case OBS_KEY_HANGUL_POSTHANJA: return XK_Hangul_PostHanja;
+	case OBS_KEY_HANGUL_SPECIAL: return XK_Hangul_Special;
+	case OBS_KEY_DEAD_GRAVE: return XK_dead_grave;
+	case OBS_KEY_DEAD_ACUTE: return XK_dead_acute;
+	case OBS_KEY_DEAD_CIRCUMFLEX: return XK_dead_circumflex;
+	case OBS_KEY_DEAD_TILDE: return XK_dead_tilde;
+	case OBS_KEY_DEAD_MACRON: return XK_dead_macron;
+	case OBS_KEY_DEAD_BREVE: return XK_dead_breve;
+	case OBS_KEY_DEAD_ABOVEDOT: return XK_dead_abovedot;
+	case OBS_KEY_DEAD_DIAERESIS: return XK_dead_diaeresis;
+	case OBS_KEY_DEAD_ABOVERING: return XK_dead_abovering;
+	case OBS_KEY_DEAD_DOUBLEACUTE: return XK_dead_doubleacute;
+	case OBS_KEY_DEAD_CARON: return XK_dead_caron;
+	case OBS_KEY_DEAD_CEDILLA: return XK_dead_cedilla;
+	case OBS_KEY_DEAD_OGONEK: return XK_dead_ogonek;
+	case OBS_KEY_DEAD_IOTA: return XK_dead_iota;
+	case OBS_KEY_DEAD_VOICED_SOUND: return XK_dead_voiced_sound;
+	case OBS_KEY_DEAD_SEMIVOICED_SOUND: return XK_dead_semivoiced_sound;
+	case OBS_KEY_DEAD_BELOWDOT: return XK_dead_belowdot;
+	case OBS_KEY_DEAD_HOOK: return XK_dead_hook;
+	case OBS_KEY_DEAD_HORN: return XK_dead_horn;
+
+	case OBS_KEY_MOUSE1: return MOUSE_1;
+	case OBS_KEY_MOUSE2: return MOUSE_2;
+	case OBS_KEY_MOUSE3: return MOUSE_3;
+	case OBS_KEY_MOUSE4: return MOUSE_4;
+	case OBS_KEY_MOUSE5: return MOUSE_5;
+
+	/* TODO: Implement keys for non-US keyboards */
+	default:;
+	}
+	return 0;
+}
+
+static inline void fill_base_keysyms(struct obs_core_hotkeys *hotkeys)
+{
+	for (size_t i = 0; i < OBS_KEY_LAST_VALUE; i++)
+		hotkeys->platform_context->base_keysyms[i] = get_keysym(i);
+}
+
+static obs_key_t key_from_base_keysym(obs_hotkeys_platform_t *context,
+		xcb_keysym_t code)
+{
+	for (size_t i = 0; i < OBS_KEY_LAST_VALUE; i++) {
+		if (context->base_keysyms[i] == (xcb_keysym_t)code) {
+			return (obs_key_t)i;
+		}
+	}
+
+	return OBS_KEY_NONE;
+}
+
+static inline void add_key(obs_hotkeys_platform_t *context, obs_key_t key,
+		int code)
+{
+	xcb_keycode_t kc = (xcb_keycode_t)code;
+	da_push_back(context->keycodes[key].list, &kc);
+
+	if (context->keycodes[key].list.num > 1) {
+		blog(LOG_DEBUG, "found alternate keycode %d for %s "
+		                "which already has keycode %d",
+		                code, obs_key_to_name(key),
+		                (int)context->keycodes[key].list.array[0]);
+	}
+}
+
+static inline bool fill_keycodes(struct obs_core_hotkeys *hotkeys)
+{
+	obs_hotkeys_platform_t *context = hotkeys->platform_context;
+	xcb_connection_t *connection = XGetXCBConnection(context->display);
+	const struct xcb_setup_t *setup = xcb_get_setup(connection);
+	xcb_get_keyboard_mapping_cookie_t cookie;
+	xcb_get_keyboard_mapping_reply_t *reply;
+	xcb_generic_error_t *error = NULL;
+	int code;
+
+	int mincode = setup->min_keycode;
+	int maxcode = setup->max_keycode;
+
+	context->min_keycode = setup->min_keycode;
+
+	cookie = xcb_get_keyboard_mapping(connection,
+			mincode, maxcode - mincode - 1);
+
+	reply = xcb_get_keyboard_mapping_reply(connection, cookie, &error);
+
+	if (error || !reply) {
+		blog(LOG_WARNING, "xcb_get_keyboard_mapping_reply failed");
+		goto error1;
+	}
+
+	const xcb_keysym_t *keysyms = xcb_get_keyboard_mapping_keysyms(reply);
+	int syms_per_code = (int)reply->keysyms_per_keycode;
+
+	context->num_keysyms = (maxcode - mincode) * syms_per_code;
+	context->syms_per_code = syms_per_code;
+	context->keysyms = bmemdup(keysyms,
+			sizeof(xcb_keysym_t) * context->num_keysyms);
+
+	for (code = mincode; code <= maxcode; code++) {
+		const xcb_keysym_t *sym;
+		obs_key_t key;
+
+		sym = &keysyms[(code - mincode) * syms_per_code];
+
+		for (int i = 0; i < syms_per_code; i++) {
+			if (!sym[i])
+				break;
+
+			if (sym[i] == XK_Super_L) {
+				context->super_l_code = code;
+				break;
+			} else if (sym[i] == XK_Super_R) {
+				context->super_r_code = code;
+				break;
+			} else {
+				key = key_from_base_keysym(context, sym[i]);
+
+				if (key != OBS_KEY_NONE) {
+					add_key(context, key, code);
+					break;
+				}
+			}
+		}
+
+	}
+
+error1:
+	free(reply);
+	free(error);
+
+	return error != NULL || reply == NULL;
+}
+
 bool obs_hotkeys_platform_init(struct obs_core_hotkeys *hotkeys)
 {
-	UNUSED_PARAMETER(hotkeys);
+	Display *display = XOpenDisplay(NULL);
+	if (!display)
+		return false;
+
+	hotkeys->platform_context = bzalloc(sizeof(obs_hotkeys_platform_t));
+	hotkeys->platform_context->display = display;
 
+	fill_base_keysyms(hotkeys);
+	fill_keycodes(hotkeys);
 	return true;
 }
 
 void obs_hotkeys_platform_free(struct obs_core_hotkeys *hotkeys)
 {
-	UNUSED_PARAMETER(hotkeys);
+	obs_hotkeys_platform_t *context = hotkeys->platform_context;
+
+	for (size_t i = 0; i < OBS_KEY_LAST_VALUE; i++)
+		da_free(context->keycodes[i].list);
+
+	XCloseDisplay(context->display);
+	bfree(context->keysyms);
+	bfree(context);
+
+	hotkeys->platform_context = NULL;
+}
+
+static xcb_screen_t *default_screen(obs_hotkeys_platform_t *context,
+		xcb_connection_t *connection)
+{
+	int def_screen_idx = XDefaultScreen(context->display);
+	xcb_screen_iterator_t iter;
+
+	iter = xcb_setup_roots_iterator(xcb_get_setup(connection));
+	while (iter.rem) {
+		if (--def_screen_idx == 0) {
+			return iter.data;
+			break;
+		}
+
+		xcb_screen_next(&iter);
+	}
+
+	return NULL;
+}
+
+static inline xcb_window_t root_window(obs_hotkeys_platform_t *context,
+		xcb_connection_t *connection)
+{
+	xcb_screen_t *screen = default_screen(context, connection);
+	if (screen)
+		return screen->root;
+	return 0;
+}
+
+static bool mouse_button_pressed(xcb_connection_t *connection,
+		obs_hotkeys_platform_t *context, obs_key_t key)
+{
+	xcb_generic_error_t *error = NULL;
+	xcb_query_pointer_cookie_t qpc;
+	xcb_query_pointer_reply_t *reply;
+	bool ret = false;
+
+	qpc = xcb_query_pointer(connection, root_window(context, connection));
+	reply = xcb_query_pointer_reply(connection, qpc, &error);
+
+	if (error) {
+		blog(LOG_WARNING, "xcb_query_pointer_reply failed");
+	} else {
+		uint16_t buttons = reply->mask;
+
+		switch (key) {
+		case OBS_KEY_MOUSE1: ret = buttons & XCB_BUTTON_MASK_1; break;
+		case OBS_KEY_MOUSE2: ret = buttons & XCB_BUTTON_MASK_3; break;
+		case OBS_KEY_MOUSE3: ret = buttons & XCB_BUTTON_MASK_2; break;
+		default:;
+		}
+	}
+
+	free(reply);
+	free(error);
+	return ret;
+}
+
+static inline bool keycode_pressed(xcb_query_keymap_reply_t *reply,
+		xcb_keycode_t code)
+{
+	return (reply->keys[code / 8] & (1 << (code % 8))) != 0;
+}
+
+static bool key_pressed(xcb_connection_t *connection,
+		obs_hotkeys_platform_t *context, obs_key_t key)
+{
+	struct keycode_list *codes = &context->keycodes[key];
+	xcb_generic_error_t *error = NULL;
+	xcb_query_keymap_reply_t *reply;
+	bool pressed = false;
+
+	reply = xcb_query_keymap_reply(connection,
+			xcb_query_keymap(connection), &error);
+	if (error) {
+		blog(LOG_WARNING, "xcb_query_keymap failed");
+
+	} else if (key == OBS_KEY_META) {
+		pressed = keycode_pressed(reply, context->super_l_code) ||
+		          keycode_pressed(reply, context->super_r_code);
+
+	} else {
+		for (size_t i = 0; i < codes->list.num; i++) {
+			if (keycode_pressed(reply, codes->list.array[i])) {
+				pressed = true;
+				break;
+			}
+		}
+	}
+
+	free(reply);
+	free(error);
+	return pressed;
 }
 
 bool obs_hotkeys_platform_is_pressed(obs_hotkeys_platform_t *context,
 		obs_key_t key)
 {
-	UNUSED_PARAMETER(context);
-	UNUSED_PARAMETER(key);
+	xcb_connection_t *conn = XGetXCBConnection(context->display);
+
+	if (key >= OBS_KEY_MOUSE1 && key <= OBS_KEY_MOUSE29) {
+		return mouse_button_pressed(conn, context, key);
+	} else {
+		return key_pressed(conn, context, key);
+	}
+}
+
+static bool get_key_translation(struct dstr *dstr, xcb_keycode_t keycode)
+{
+	xcb_connection_t *connection;
+	char name[128];
+
+	connection = XGetXCBConnection(obs->hotkeys.platform_context->display);
+
+	XKeyEvent event = {0};
+	event.type = KeyPress;
+	event.display = obs->hotkeys.platform_context->display;
+	event.keycode = keycode;
+	event.root = root_window(obs->hotkeys.platform_context, connection);
+	event.window = event.root;
+
+	if (keycode) {
+		int len = XLookupString(&event, name, 128, NULL, NULL);
+		if (len) {
+			dstr_ncopy(dstr, name, len);
+			dstr_to_upper(dstr);
+			return true;
+		}
+	}
 
 	return false;
 }
 
-void obs_key_to_str(obs_key_t key, struct dstr *str)
+void obs_key_to_str(obs_key_t key, struct dstr *dstr)
 {
-	UNUSED_PARAMETER(key);
-	UNUSED_PARAMETER(str);
+	if (key >= OBS_KEY_MOUSE1 && key <= OBS_KEY_MOUSE29) {
+		if (obs->hotkeys.translations[key]) {
+			dstr_copy(dstr, obs->hotkeys.translations[key]);
+		} else {
+			dstr_printf(dstr, "Mouse %d",
+					(int)(key - OBS_KEY_MOUSE1 + 1));
+		}
+		return;
+	}
+
+	if (key >= OBS_KEY_NUM0 && key <= OBS_KEY_NUM9) {
+		if (obs->hotkeys.translations[key]) {
+			dstr_copy(dstr, obs->hotkeys.translations[key]);
+		} else {
+			dstr_printf(dstr, "Numpad %d",
+					(int)(key - OBS_KEY_NUM0));
+		}
+		return;
+	}
+
+#define translate_key(key, def) \
+	dstr_copy(dstr, obs_get_hotkey_translation(key, def))
+
+	switch (key) {
+	case OBS_KEY_INSERT:       return translate_key(key, "Insert");
+	case OBS_KEY_DELETE:       return translate_key(key, "Delete");
+	case OBS_KEY_HOME:         return translate_key(key, "Home");
+	case OBS_KEY_END:          return translate_key(key, "End");
+	case OBS_KEY_PAGEUP:       return translate_key(key, "Page Up");
+	case OBS_KEY_PAGEDOWN:     return translate_key(key, "Page Down");
+	case OBS_KEY_NUMLOCK:      return translate_key(key, "Num Lock");
+	case OBS_KEY_SCROLLLOCK:   return translate_key(key, "Scroll Lock");
+	case OBS_KEY_CAPSLOCK:     return translate_key(key, "Caps Lock");
+	case OBS_KEY_BACKSPACE:    return translate_key(key, "Backspace");
+	case OBS_KEY_TAB:          return translate_key(key, "Tab");
+	case OBS_KEY_PRINT:        return translate_key(key, "Print");
+	case OBS_KEY_PAUSE:        return translate_key(key, "Pause");
+	case OBS_KEY_LEFT:         return translate_key(key, "Left");
+	case OBS_KEY_RIGHT:        return translate_key(key, "Right");
+	case OBS_KEY_UP:           return translate_key(key, "Up");
+	case OBS_KEY_DOWN:         return translate_key(key, "Down");
+	case OBS_KEY_SHIFT:        return translate_key(key, "Shift");
+	case OBS_KEY_ALT:          return translate_key(key, "Alt");
+	case OBS_KEY_CONTROL:      return translate_key(key, "Control");
+	case OBS_KEY_META:         return translate_key(key, "Super");
+	case OBS_KEY_MENU:         return translate_key(key, "Menu");
+	case OBS_KEY_NUMASTERISK:  return translate_key(key, "Numpad *");
+	case OBS_KEY_NUMPLUS:      return translate_key(key, "Numpad +");
+	case OBS_KEY_NUMCOMMA:     return translate_key(key, "Numpad ,");
+	case OBS_KEY_NUMPERIOD:    return translate_key(key, "Numpad .");
+	case OBS_KEY_NUMSLASH:     return translate_key(key, "Numpad /");
+	default:;
+	}
+
+	if (key >= OBS_KEY_F1 && key <= OBS_KEY_F35) {
+		dstr_printf(dstr, "F%d",
+				(int)(key - OBS_KEY_F1 + 1));
+		return;
+	}
+
+	obs_hotkeys_platform_t *context = obs->hotkeys.platform_context;
+	struct keycode_list *keycodes = &context->keycodes[key];
+
+	for (size_t i = 0; i < keycodes->list.num; i++) {
+		if (get_key_translation(dstr, keycodes->list.array[i])) {
+			break;
+		}
+	}
+
+	if (key != OBS_KEY_NONE && dstr_is_empty(dstr)) {
+		dstr_copy(dstr, obs_key_to_name(key));
+	}
 }
 
-void obs_key_combination_to_str(obs_key_combination_t key, struct dstr *str)
+static obs_key_t key_from_keycode(obs_hotkeys_platform_t *context,
+		xcb_keycode_t code)
 {
-	UNUSED_PARAMETER(key);
-	UNUSED_PARAMETER(str);
+	for (size_t i = 0; i < OBS_KEY_LAST_VALUE; i++) {
+		struct keycode_list *codes = &context->keycodes[i];
+
+		for (size_t j = 0; j < codes->list.num; j++) {
+			if (codes->list.array[j] == code) {
+				return (obs_key_t)i;
+			}
+		}
+	}
+
+	return OBS_KEY_NONE;
 }
 
-obs_key_t obs_key_from_virtual_key(int code)
+obs_key_t obs_key_from_virtual_key(int sym)
 {
-	UNUSED_PARAMETER(code);
+	obs_hotkeys_platform_t *context = obs->hotkeys.platform_context;
+	const xcb_keysym_t *keysyms = context->keysyms;
+	int syms_per_code = context->syms_per_code;
+	int num_keysyms = context->num_keysyms;
+
+	if (sym == 0)
+		return OBS_KEY_NONE;
+
+	for (int i = 0; i < num_keysyms; i++) {
+		if (keysyms[i] == (xcb_keysym_t)sym) {
+			xcb_keycode_t code = (xcb_keycode_t)(i / syms_per_code);
+			code += context->min_keycode;
+			obs_key_t key = key_from_keycode(context, code);
+
+			return key;
+		}
+	}
 
 	return OBS_KEY_NONE;
 }
 
 int obs_key_to_virtual_key(obs_key_t key)
 {
-	UNUSED_PARAMETER(key);
+	if (key == OBS_KEY_META)
+		return XK_Super_L;
 
-	return 0;
+	return (int)obs->hotkeys.platform_context->base_keysyms[(int)key];
+}
+
+static inline void add_combo_key(obs_key_t key, struct dstr *str)
+{
+	struct dstr key_str = {0};
+
+	obs_key_to_str(key, &key_str);
+
+	if (!dstr_is_empty(&key_str)) {
+		if (!dstr_is_empty(str)) {
+			dstr_cat(str, " + ");
+		}
+		dstr_cat_dstr(str, &key_str);
+	}
+
+	dstr_free(&key_str);
+}
+
+void obs_key_combination_to_str(obs_key_combination_t combination,
+		struct dstr *str)
+{
+	if ((combination.modifiers & INTERACT_CONTROL_KEY) != 0) {
+		add_combo_key(OBS_KEY_CONTROL, str);
+	}
+	if ((combination.modifiers & INTERACT_COMMAND_KEY) != 0) {
+		add_combo_key(OBS_KEY_META, str);
+	}
+	if ((combination.modifiers & INTERACT_ALT_KEY) != 0) {
+		add_combo_key(OBS_KEY_ALT, str);
+	}
+	if ((combination.modifiers & INTERACT_SHIFT_KEY) != 0) {
+		add_combo_key(OBS_KEY_SHIFT, str);
+	}
+	if (combination.key != OBS_KEY_NONE) {
+		add_combo_key(combination.key, str);
+	}
 }