Keep keyboard led when turning on global hotkeys, move files

3 files changed, 793 insertions, 0 deletions

diff --git a/src/GlobalHotkeys/GlobalHotkeysJoystick.cpp b/src/GlobalHotkeys/GlobalHotkeysJoystick.cpp
new file mode 100644
index 0000000..b3b21c8
--- /dev/null
+++ b/src/GlobalHotkeys/GlobalHotkeysJoystick.cpp
@@ -0,0 +1,317 @@
+#include "../../include/GlobalHotkeys/GlobalHotkeysJoystick.hpp"
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/eventfd.h>
+
+namespace gsr {
+    static constexpr int button_pressed = 1;
+    static constexpr int cross_button = 0;
+    static constexpr int triangle_button = 2;
+    static constexpr int options_button = 9;
+    static constexpr int playstation_button = 10;
+    static constexpr int axis_up_down = 7;
+    static constexpr int axis_left_right = 6;
+
+    // Returns -1 on error
+    static int get_js_dev_input_id_from_filepath(const char *dev_input_filepath) {
+        if(strncmp(dev_input_filepath, "/dev/input/js", 13) != 0)
+            return -1;
+
+        int dev_input_id = -1;
+        if(sscanf(dev_input_filepath + 13, "%d", &dev_input_id) == 1)
+            return dev_input_id;
+        return -1;
+    }
+
+    GlobalHotkeysJoystick::~GlobalHotkeysJoystick() {
+        if(event_fd > 0) {
+            const uint64_t exit = 1;
+            write(event_fd, &exit, sizeof(exit));
+        }
+
+        if(read_thread.joinable())
+            read_thread.join();
+
+        if(event_fd > 0)
+            close(event_fd);
+
+        for(int i = 0; i < num_poll_fd; ++i) {
+            close(poll_fd[i].fd);
+        }
+    }
+
+    bool GlobalHotkeysJoystick::start() {
+        if(num_poll_fd > 0)
+            return false;
+
+        event_fd = eventfd(0, 0);
+        if(event_fd <= 0)
+            return false;
+
+        event_index = num_poll_fd;
+        poll_fd[num_poll_fd] = {
+            event_fd,
+            POLLIN,
+            0
+        };
+        extra_data[num_poll_fd] = {
+            -1
+        };
+        ++num_poll_fd;
+
+        if(!hotplug.start()) {
+            fprintf(stderr, "Warning: failed to setup hotplugging\n");
+        } else {
+            hotplug_poll_index = num_poll_fd;
+            poll_fd[num_poll_fd] = {
+                hotplug.steal_fd(),
+                POLLIN,
+                0
+            };
+            extra_data[num_poll_fd] = {
+                -1
+            };
+            ++num_poll_fd;
+        }
+
+        char dev_input_path[128];
+        for(int i = 0; i < 8; ++i) {
+            snprintf(dev_input_path, sizeof(dev_input_path), "/dev/input/js%d", i);
+            add_device(dev_input_path, false);
+        }
+
+        if(num_poll_fd == 0)
+            fprintf(stderr, "Info: no joysticks found, assuming they might be connected later\n");
+
+        read_thread = std::thread(&GlobalHotkeysJoystick::read_events, this);
+        return true;
+    }
+
+    bool GlobalHotkeysJoystick::bind_action(const std::string &id, GlobalHotkeyCallback callback) {
+        if(num_poll_fd == 0)
+            return false;
+        return bound_actions_by_id.insert(std::make_pair(id, std::move(callback))).second;
+    }
+
+    void GlobalHotkeysJoystick::poll_events() {
+        if(num_poll_fd == 0)
+            return;
+
+        if(save_replay) {
+            save_replay = false;
+            auto it = bound_actions_by_id.find("save_replay");
+            if(it != bound_actions_by_id.end())
+                it->second("save_replay");
+        }
+
+        if(save_1_min_replay) {
+            save_1_min_replay = false;
+            auto it = bound_actions_by_id.find("save_1_min_replay");
+            if(it != bound_actions_by_id.end())
+                it->second("save_1_min_replay");
+        }
+
+        if(save_10_min_replay) {
+            save_10_min_replay = false;
+            auto it = bound_actions_by_id.find("save_10_min_replay");
+            if(it != bound_actions_by_id.end())
+                it->second("save_10_min_replay");
+        }
+
+        if(take_screenshot) {
+            take_screenshot = false;
+            auto it = bound_actions_by_id.find("take_screenshot");
+            if(it != bound_actions_by_id.end())
+                it->second("take_screenshot");
+        }
+
+        if(toggle_record) {
+            toggle_record = false;
+            auto it = bound_actions_by_id.find("toggle_record");
+            if(it != bound_actions_by_id.end())
+                it->second("toggle_record");
+        }
+
+        if(toggle_replay) {
+            toggle_replay = false;
+            auto it = bound_actions_by_id.find("toggle_replay");
+            if(it != bound_actions_by_id.end())
+                it->second("toggle_replay");
+        }
+
+        if(toggle_show) {
+            toggle_show = false;
+            auto it = bound_actions_by_id.find("toggle_show");
+            if(it != bound_actions_by_id.end())
+                it->second("toggle_show");
+        }
+    }
+
+    void GlobalHotkeysJoystick::read_events() {
+        js_event event;
+        while(poll(poll_fd, num_poll_fd, -1) > 0) {
+            for(int i = 0; i < num_poll_fd; ++i) {
+                if(poll_fd[i].revents & (POLLHUP|POLLERR|POLLNVAL)) {
+                    if(i == event_index)
+                        goto done;
+
+                    if(remove_poll_fd(i))
+                        --i; // This item was removed so we want to repeat the same index to continue to the next item
+
+                    continue;
+                }
+
+                if(!(poll_fd[i].revents & POLLIN))
+                    continue;
+
+                if(i == event_index) {
+                    goto done;
+                } else if(i == hotplug_poll_index) {
+                    hotplug.process_event_data(poll_fd[i].fd, [&](HotplugAction hotplug_action, const char *devname) {
+                        char dev_input_filepath[1024];
+                        snprintf(dev_input_filepath, sizeof(dev_input_filepath), "/dev/%s", devname);
+                        switch(hotplug_action) {
+                            case HotplugAction::ADD: {
+                                // Cant open the /dev/input device immediately or it fails.
+                                // TODO: Remove this hack when a better solution is found.
+                                usleep(50 * 1000);
+                                add_device(dev_input_filepath);
+                                break;
+                            }
+                            case HotplugAction::REMOVE: {
+                                if(remove_device(dev_input_filepath))
+                                    --i; // This item was removed so we want to repeat the same index to continue to the next item
+                                break;
+                            }
+                        }
+                    });
+                } else {
+                    process_js_event(poll_fd[i].fd, event);
+                }
+            }
+        }
+
+        done:
+        ;
+    }
+
+    void GlobalHotkeysJoystick::process_js_event(int fd, js_event &event) {
+        if(read(fd, &event, sizeof(event)) != sizeof(event))
+            return;
+
+        if((event.type & JS_EVENT_BUTTON) == JS_EVENT_BUTTON) {
+            switch(event.number) {
+                case playstation_button: {
+                    playstation_button_pressed = event.value == button_pressed;
+                    break;
+                }
+                case options_button: {
+                    if(playstation_button_pressed && event.value == button_pressed)
+                        toggle_show = true;
+                    break;
+                }
+                case cross_button: {
+                    if(playstation_button_pressed && event.value == button_pressed)
+                        save_1_min_replay = true;
+                    break;
+                }
+                case triangle_button: {
+                    if(playstation_button_pressed && event.value == button_pressed)
+                        save_10_min_replay = true;
+                    break;
+                }
+            }
+        } else if((event.type & JS_EVENT_AXIS) == JS_EVENT_AXIS && playstation_button_pressed) {
+            const int trigger_threshold = 16383;
+            const bool prev_up_pressed = up_pressed;
+            const bool prev_down_pressed = down_pressed;
+            const bool prev_left_pressed = left_pressed;
+            const bool prev_right_pressed = right_pressed;
+
+            if(event.number == axis_up_down) {
+                up_pressed = event.value <= -trigger_threshold;
+                down_pressed = event.value >= trigger_threshold;
+            } else if(event.number == axis_left_right) {
+                left_pressed = event.value <= -trigger_threshold;
+                right_pressed = event.value >= trigger_threshold;
+            }
+
+            if(up_pressed && !prev_up_pressed)
+                take_screenshot = true;
+            else if(down_pressed && !prev_down_pressed)
+                save_replay = true;
+            else if(left_pressed && !prev_left_pressed)
+                toggle_record = true;
+            else if(right_pressed && !prev_right_pressed)
+                toggle_replay = true;
+        }
+    }
+
+    bool GlobalHotkeysJoystick::add_device(const char *dev_input_filepath, bool print_error) {
+        if(num_poll_fd >= max_js_poll_fd) {
+            fprintf(stderr, "Warning: failed to add joystick device %s, too many joysticks have been added\n", dev_input_filepath);
+            return false;
+        }
+
+        const int dev_input_id = get_js_dev_input_id_from_filepath(dev_input_filepath);
+        if(dev_input_id == -1)
+            return false;
+
+        const int fd = open(dev_input_filepath, O_RDONLY);
+        if(fd <= 0) {
+            if(print_error)
+                fprintf(stderr, "Error: failed to add joystick %s, error: %s\n", dev_input_filepath, strerror(errno));
+            return false;
+        }
+
+        poll_fd[num_poll_fd] = {
+            fd,
+            POLLIN,
+            0
+        };
+
+        extra_data[num_poll_fd] = {
+            dev_input_id
+        };
+
+        ++num_poll_fd;
+        fprintf(stderr, "Info: added joystick: %s\n", dev_input_filepath);
+        return true;
+    }
+
+    bool GlobalHotkeysJoystick::remove_device(const char *dev_input_filepath) {
+        const int dev_input_id = get_js_dev_input_id_from_filepath(dev_input_filepath);
+        if(dev_input_id == -1)
+            return false;
+
+        const int poll_fd_index = get_poll_fd_index_by_dev_input_id(dev_input_id);
+        if(poll_fd_index == -1)
+            return false;
+
+        fprintf(stderr, "Info: removed joystick: %s\n", dev_input_filepath);
+        return remove_poll_fd(poll_fd_index);
+    }
+
+    bool GlobalHotkeysJoystick::remove_poll_fd(int index) {
+        if(index < 0 || index >= num_poll_fd)
+            return false;
+
+        close(poll_fd[index].fd);
+        for(int i = index + 1; i < num_poll_fd; ++i) {
+            poll_fd[i - 1] = poll_fd[i];
+            extra_data[i - 1] = extra_data[i];
+        }
+        --num_poll_fd;
+        return true;
+    }
+
+    int GlobalHotkeysJoystick::get_poll_fd_index_by_dev_input_id(int dev_input_id) const {
+        for(int i = 0; i < num_poll_fd; ++i) {
+            if(dev_input_id == extra_data[i].dev_input_id)
+                return i;
+        }
+        return -1;
+    }
+}
diff --git a/src/GlobalHotkeys/GlobalHotkeysLinux.cpp b/src/GlobalHotkeys/GlobalHotkeysLinux.cpp
new file mode 100644
index 0000000..a56bbc6
--- /dev/null
+++ b/src/GlobalHotkeys/GlobalHotkeysLinux.cpp
@@ -0,0 +1,275 @@
+#include "../../include/GlobalHotkeys/GlobalHotkeysLinux.hpp"
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <string.h>
+
+extern "C" {
+#include <mgl/mgl.h>
+}
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <linux/input-event-codes.h>
+
+#define PIPE_READ 0
+#define PIPE_WRITE 1
+
+namespace gsr {
+    static const char* grab_type_to_arg(GlobalHotkeysLinux::GrabType grab_type) {
+        switch(grab_type) {
+            case GlobalHotkeysLinux::GrabType::ALL:     return "--all";
+            case GlobalHotkeysLinux::GrabType::VIRTUAL: return "--virtual";
+        }
+        return "--all";
+    }
+
+    static inline uint8_t x11_keycode_to_linux_keycode(uint8_t code) {
+        return code - 8;
+    }
+
+    static std::vector<uint8_t> modifiers_to_linux_keys(uint32_t modifiers) {
+        std::vector<uint8_t> result;
+        if(modifiers & HOTKEY_MOD_LSHIFT)
+            result.push_back(KEY_LEFTSHIFT);
+        if(modifiers & HOTKEY_MOD_RSHIFT)
+            result.push_back(KEY_RIGHTSHIFT);
+        if(modifiers & HOTKEY_MOD_LCTRL)
+            result.push_back(KEY_LEFTCTRL);
+        if(modifiers & HOTKEY_MOD_RCTRL)
+            result.push_back(KEY_RIGHTCTRL);
+        if(modifiers & HOTKEY_MOD_LALT)
+            result.push_back(KEY_LEFTALT);
+        if(modifiers & HOTKEY_MOD_RALT)
+            result.push_back(KEY_RIGHTALT);
+        if(modifiers & HOTKEY_MOD_LSUPER)
+            result.push_back(KEY_LEFTMETA);
+        if(modifiers & HOTKEY_MOD_RSUPER)
+            result.push_back(KEY_RIGHTMETA);
+        return result;
+    }
+
+    static std::string linux_keys_to_command_string(const uint8_t *keys, size_t size) {
+        std::string result;
+        for(size_t i = 0; i < size; ++i) {
+            if(!result.empty())
+                result += "+";
+            result += std::to_string(keys[i]);
+        }
+        return result;
+    }
+
+    static bool x11_key_is_alpha_numerical(KeySym keysym) {
+        return (keysym >= XK_A && keysym <= XK_Z) || (keysym >= XK_a && keysym <= XK_z) || (keysym >= XK_0 && keysym <= XK_9);
+    }
+
+    GlobalHotkeysLinux::GlobalHotkeysLinux(GrabType grab_type) : grab_type(grab_type) {
+        for(int i = 0; i < 2; ++i) {
+            read_pipes[i] = -1;
+            write_pipes[i] = -1;
+        }
+    }
+
+    GlobalHotkeysLinux::~GlobalHotkeysLinux() {
+        if(write_pipes[PIPE_WRITE] > 0) {
+            char command[32];
+            const int command_size = snprintf(command, sizeof(command), "exit\n");
+            if(write(write_pipes[PIPE_WRITE], command, command_size) != command_size) {
+                fprintf(stderr, "Error: GlobalHotkeysLinux::~GlobalHotkeysLinux: failed to write command to gsr-global-hotkeys, error: %s\n", strerror(errno));
+                close_fds();
+            }
+        } else {
+            close_fds();
+        }
+
+        if(process_id > 0) {
+            int status;
+            waitpid(process_id, &status, 0);
+        }
+
+        close_fds();
+    }
+
+    void GlobalHotkeysLinux::close_fds() {
+        for(int i = 0; i < 2; ++i) {
+            if(read_pipes[i] > 0) {
+                close(read_pipes[i]);
+                read_pipes[i] = -1;
+            }
+
+            if(write_pipes[i] > 0) {
+                close(write_pipes[i]);
+                write_pipes[i] = -1;
+            }
+        }
+
+        if(read_file) {
+            fclose(read_file);
+            read_file = nullptr;
+        }
+    }
+
+    bool GlobalHotkeysLinux::start() {
+        const char *grab_type_arg = grab_type_to_arg(grab_type);
+        const bool inside_flatpak = getenv("FLATPAK_ID") != NULL;
+        const char *user_homepath = getenv("HOME");
+        if(!user_homepath)
+            user_homepath = "/tmp";
+
+        if(process_id > 0)
+            return false;
+
+        if(pipe(read_pipes) == -1)
+            return false;
+
+        if(pipe(write_pipes) == -1) {
+            for(int i = 0; i < 2; ++i) {
+                close(read_pipes[i]);
+                read_pipes[i] = -1;
+            }
+            return false;
+        }
+
+        const pid_t pid = vfork();
+        if(pid == -1) {
+            perror("Failed to vfork");
+            for(int i = 0; i < 2; ++i) {
+                close(read_pipes[i]);
+                close(write_pipes[i]);
+                read_pipes[i] = -1;
+                write_pipes[i] = -1;
+            }
+            return false;
+        } else if(pid == 0) { /* child */
+            dup2(read_pipes[PIPE_WRITE], STDOUT_FILENO);
+            for(int i = 0; i < 2; ++i) {
+                close(read_pipes[i]);
+            }
+
+            dup2(write_pipes[PIPE_READ], STDIN_FILENO);
+            for(int i = 0; i < 2; ++i) {
+                close(write_pipes[i]);
+            }
+
+            if(inside_flatpak) {
+                const char *args[] = { "flatpak-spawn", "--host", "/var/lib/flatpak/app/com.dec05eba.gpu_screen_recorder/current/active/files/bin/kms-server-proxy", "launch-gsr-global-hotkeys", user_homepath, grab_type_arg, nullptr };
+                execvp(args[0], (char* const*)args);
+            } else {
+                const char *args[] = { "gsr-global-hotkeys", grab_type_arg, nullptr };
+                execvp(args[0], (char* const*)args);
+            }
+
+            perror("gsr-global-hotkeys");
+            _exit(127);
+        } else { /* parent */
+            process_id = pid;
+
+            close(read_pipes[PIPE_WRITE]);
+            read_pipes[PIPE_WRITE] = -1;
+
+            close(write_pipes[PIPE_READ]);
+            write_pipes[PIPE_READ] = -1;
+
+            fcntl(read_pipes[PIPE_READ], F_SETFL, fcntl(read_pipes[PIPE_READ], F_GETFL) | O_NONBLOCK);
+            read_file = fdopen(read_pipes[PIPE_READ], "r");
+            if(read_file)
+                read_pipes[PIPE_READ] = -1;
+            else
+                fprintf(stderr, "fdopen failed for read, error: %s\n", strerror(errno));
+        }
+
+        return true;
+    }
+
+    bool GlobalHotkeysLinux::bind_key_press(Hotkey hotkey, const std::string &id, GlobalHotkeyCallback callback) {
+        if(process_id <= 0)
+            return false;
+
+        if(bound_actions_by_id.find(id) != bound_actions_by_id.end())
+            return false;
+
+        if(id.find(' ') != std::string::npos || id.find('\n') != std::string::npos) {
+            fprintf(stderr, "Error: GlobalHotkeysLinux::bind_key_press: id \"%s\" contains either space or newline\n", id.c_str());
+            return false;
+        }
+
+        if(hotkey.key == 0) {
+            //fprintf(stderr, "Error: GlobalHotkeysLinux::bind_key_press: hotkey requires a key\n");
+            return false;
+        }
+
+        if(hotkey.modifiers == 0 && x11_key_is_alpha_numerical(hotkey.key)) {
+            //fprintf(stderr, "Error: GlobalHotkeysLinux::bind_key_press: hotkey requires a modifier\n");
+            return false;
+        }
+
+        mgl_context *context = mgl_get_context();
+        Display *display = (Display*)context->connection;
+        const uint8_t keycode = x11_keycode_to_linux_keycode(XKeysymToKeycode(display, hotkey.key));
+        const std::vector<uint8_t> modifiers = modifiers_to_linux_keys(hotkey.modifiers);
+        const std::string modifiers_command = linux_keys_to_command_string(modifiers.data(), modifiers.size());
+
+        char command[256];
+        int command_size = 0;
+        if(modifiers_command.empty())
+            command_size = snprintf(command, sizeof(command), "bind %s %d\n", id.c_str(), (int)keycode);
+        else
+            command_size = snprintf(command, sizeof(command), "bind %s %d+%s\n", id.c_str(), (int)keycode, modifiers_command.c_str());
+
+        if(write(write_pipes[PIPE_WRITE], command, command_size) != command_size) {
+            fprintf(stderr, "Error: GlobalHotkeysLinux::bind_key_press: failed to write command to gsr-global-hotkeys, error: %s\n", strerror(errno));
+            return false;
+        }
+
+        bound_actions_by_id[id] = std::move(callback);
+        return true;
+    }
+
+    void GlobalHotkeysLinux::unbind_all_keys() {
+        if(process_id <= 0)
+            return;
+
+        if(bound_actions_by_id.empty())
+            return;
+
+        char command[32];
+        const int command_size = snprintf(command, sizeof(command), "unbind_all\n");
+        if(write(write_pipes[PIPE_WRITE], command, command_size) != command_size) {
+            fprintf(stderr, "Error: GlobalHotkeysLinux::unbind_all_keys: failed to write command to gsr-global-hotkeys, error: %s\n", strerror(errno));
+        }
+        bound_actions_by_id.clear();
+    }
+
+    void GlobalHotkeysLinux::poll_events() {
+        if(process_id <= 0) {
+            //fprintf(stderr, "error: GlobalHotkeysLinux::poll_events failed, process has not been started yet. Use GlobalHotkeysLinux::start to start the process first\n");
+            return;
+        }
+
+        if(!read_file) {
+            //fprintf(stderr, "error: GlobalHotkeysLinux::poll_events failed, read file hasn't opened\n");
+            return;
+        }
+
+        std::string action;
+        char buffer[256];
+        while(true) {
+            char *line = fgets(buffer, sizeof(buffer), read_file);
+            if(!line)
+                break;
+
+            int line_len = strlen(line);
+            if(line_len == 0)
+                continue;
+
+            if(line[line_len - 1] == '\n') {
+                line[line_len - 1] = '\0';
+                --line_len;
+            }
+
+            action = line;
+            auto it = bound_actions_by_id.find(action);
+            if(it != bound_actions_by_id.end())
+                it->second(action);
+        }
+    }
+}
diff --git a/src/GlobalHotkeys/GlobalHotkeysX11.cpp b/src/GlobalHotkeys/GlobalHotkeysX11.cpp
new file mode 100644
index 0000000..bc79ce8
--- /dev/null
+++ b/src/GlobalHotkeys/GlobalHotkeysX11.cpp
@@ -0,0 +1,201 @@
+#include "../../include/GlobalHotkeys/GlobalHotkeysX11.hpp"
+#include <X11/keysym.h>
+#include <mglpp/window/Event.hpp>
+#include <assert.h>
+
+namespace gsr {
+    static bool x_failed = false;
+    static int xerror_grab_error(Display*, XErrorEvent*) {
+        x_failed = true;
+        return 0;
+    }
+
+    static unsigned int x11_get_numlock_mask(Display *dpy) {
+        unsigned int numlockmask = 0;
+        KeyCode numlock_keycode = XKeysymToKeycode(dpy, XK_Num_Lock);
+        XModifierKeymap *modmap = XGetModifierMapping(dpy);
+        if(modmap) {
+            for(int i = 0; i < 8; ++i) {
+                for(int j = 0; j < modmap->max_keypermod; ++j) {
+                    if(modmap->modifiermap[i * modmap->max_keypermod + j] == numlock_keycode)
+                        numlockmask = (1 << i);
+                }
+            }
+            XFreeModifiermap(modmap);
+        }
+        return numlockmask;
+    }
+
+    static KeySym mgl_key_to_key_sym(mgl::Keyboard::Key key) {
+        switch(key) {
+            case mgl::Keyboard::Z:   return XK_z;
+            case mgl::Keyboard::F7:  return XK_F7;
+            case mgl::Keyboard::F8:  return XK_F8;
+            case mgl::Keyboard::F9:  return XK_F9;
+            case mgl::Keyboard::F10: return XK_F10;
+            default:                 return None;
+        }
+    }
+
+    static uint32_t mgl_key_modifiers_to_x11_modifier_mask(const mgl::Event::KeyEvent &key_event) {
+        uint32_t mask = 0;
+        if(key_event.shift)
+            mask |= ShiftMask;
+        if(key_event.control)
+            mask |= ControlMask;
+        if(key_event.alt)
+            mask |= Mod1Mask;
+        if(key_event.system)
+            mask |= Mod4Mask;
+        return mask;
+    }
+
+    static uint32_t modifiers_to_x11_modifiers(uint32_t modifiers) {
+        uint32_t result = 0;
+        if(modifiers & HOTKEY_MOD_LSHIFT)
+            result |= ShiftMask;
+        if(modifiers & HOTKEY_MOD_RSHIFT)
+            result |= ShiftMask;
+        if(modifiers & HOTKEY_MOD_LCTRL)
+            result |= ControlMask;
+        if(modifiers & HOTKEY_MOD_RCTRL)
+            result |= ControlMask;
+        if(modifiers & HOTKEY_MOD_LALT)
+            result |= Mod1Mask;
+        if(modifiers & HOTKEY_MOD_RALT)
+            result |= Mod5Mask;
+        if(modifiers & HOTKEY_MOD_LSUPER)
+            result |= Mod4Mask;
+        if(modifiers & HOTKEY_MOD_RSUPER)
+            result |= Mod4Mask;
+        return result;
+    }
+
+    GlobalHotkeysX11::GlobalHotkeysX11() {
+        dpy = XOpenDisplay(NULL);
+        if(!dpy)
+            fprintf(stderr, "GlobalHotkeysX11 error: failed to connect to X11 server, global hotkeys wont be available\n");
+    }
+
+    GlobalHotkeysX11::~GlobalHotkeysX11() {
+        if(dpy) {
+            XCloseDisplay(dpy);
+            dpy = nullptr;
+        }
+    }
+
+    bool GlobalHotkeysX11::bind_key_press(Hotkey hotkey, const std::string &id, GlobalHotkeyCallback callback) {
+        if(!dpy)
+            return false;
+
+        auto it = bound_keys_by_id.find(id);
+        if(it != bound_keys_by_id.end())
+            return false;
+
+        x_failed = false;
+        XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
+
+        const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(hotkey.modifiers);
+        unsigned int numlock_mask = x11_get_numlock_mask(dpy);
+        unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
+        for(int i = 0; i < 4; ++i) {
+            XGrabKey(dpy, XKeysymToKeycode(dpy, hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy), False, GrabModeAsync, GrabModeAsync);
+        }
+        XSync(dpy, False);
+        
+        if(x_failed) {
+            for(int i = 0; i < 4; ++i) {
+                XUngrabKey(dpy, XKeysymToKeycode(dpy, hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
+            }
+            XSync(dpy, False);
+            XSetErrorHandler(prev_xerror);
+            return false;
+        } else {
+            XSetErrorHandler(prev_xerror);
+            bound_keys_by_id[id] = { hotkey, std::move(callback) };
+            return true;
+        }
+    }
+
+    void GlobalHotkeysX11::unbind_key_press(const std::string &id) {
+        if(!dpy)
+            return;
+
+        auto it = bound_keys_by_id.find(id);
+        if(it == bound_keys_by_id.end())
+            return;
+
+        x_failed = false;
+        XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
+
+        const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(it->second.hotkey.modifiers);
+        unsigned int numlock_mask = x11_get_numlock_mask(dpy);
+        unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
+        for(int i = 0; i < 4; ++i) {
+            XUngrabKey(dpy, XKeysymToKeycode(dpy, it->second.hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
+        }
+        XSync(dpy, False);
+
+        XSetErrorHandler(prev_xerror);
+        bound_keys_by_id.erase(id);
+    }
+
+    void GlobalHotkeysX11::unbind_all_keys() {
+        if(!dpy)
+            return;
+
+        x_failed = false;
+        XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
+
+        unsigned int numlock_mask = x11_get_numlock_mask(dpy);
+        unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
+        for(auto it = bound_keys_by_id.begin(); it != bound_keys_by_id.end();) {
+            const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(it->second.hotkey.modifiers);
+            for(int i = 0; i < 4; ++i) {
+                XUngrabKey(dpy, XKeysymToKeycode(dpy, it->second.hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
+            }
+        }
+        bound_keys_by_id.clear();
+        XSync(dpy, False);
+
+        XSetErrorHandler(prev_xerror);
+    }
+
+    void GlobalHotkeysX11::poll_events() {
+        if(!dpy)
+            return;
+
+        while(XPending(dpy)) {
+            XNextEvent(dpy, &xev);
+            if(xev.type == KeyPress) {
+                const KeySym key_sym = XLookupKeysym(&xev.xkey, 0);
+                call_hotkey_callback({ (uint32_t)key_sym, xev.xkey.state });
+            }
+        }
+    }
+
+    bool GlobalHotkeysX11::on_event(mgl::Event &event) {
+        if(event.type != mgl::Event::KeyPressed)
+            return true;
+
+        // Note: not all keys are mapped in mgl_key_to_key_sym. If more hotkeys are added or changed then add the key mapping there
+        const KeySym key_sym = mgl_key_to_key_sym(event.key.code);
+        const uint32_t modifiers = mgl_key_modifiers_to_x11_modifier_mask(event.key);
+        return !call_hotkey_callback(Hotkey{(uint32_t)key_sym, modifiers});
+    }
+
+    static unsigned int key_state_without_locks(unsigned int key_state) {
+        return key_state & ~(Mod2Mask|LockMask);
+    }
+
+    bool GlobalHotkeysX11::call_hotkey_callback(Hotkey hotkey) const {
+        const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(hotkey.modifiers);
+        for(const auto &[key, val] : bound_keys_by_id) {
+            if(val.hotkey.key == hotkey.key && key_state_without_locks(modifiers_to_x11_modifiers(val.hotkey.modifiers)) == key_state_without_locks(modifiers_x11)) {
+                val.callback(key);
+                return true;
+            }
+        }
+        return false;
+    }
+}
\ No newline at end of file