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https://repo.dec05eba.com/gpu-screen-recorder-ui
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Keep keyboard led when turning on global hotkeys, move files
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dec05eba
201
src/GlobalHotkeys/GlobalHotkeysX11.cpp
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201
src/GlobalHotkeys/GlobalHotkeysX11.cpp
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#include "../../include/GlobalHotkeys/GlobalHotkeysX11.hpp"
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#include <X11/keysym.h>
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#include <mglpp/window/Event.hpp>
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#include <assert.h>
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namespace gsr {
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static bool x_failed = false;
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static int xerror_grab_error(Display*, XErrorEvent*) {
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x_failed = true;
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return 0;
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}
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static unsigned int x11_get_numlock_mask(Display *dpy) {
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unsigned int numlockmask = 0;
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KeyCode numlock_keycode = XKeysymToKeycode(dpy, XK_Num_Lock);
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XModifierKeymap *modmap = XGetModifierMapping(dpy);
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if(modmap) {
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for(int i = 0; i < 8; ++i) {
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for(int j = 0; j < modmap->max_keypermod; ++j) {
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if(modmap->modifiermap[i * modmap->max_keypermod + j] == numlock_keycode)
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numlockmask = (1 << i);
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}
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}
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XFreeModifiermap(modmap);
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}
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return numlockmask;
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}
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static KeySym mgl_key_to_key_sym(mgl::Keyboard::Key key) {
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switch(key) {
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case mgl::Keyboard::Z: return XK_z;
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case mgl::Keyboard::F7: return XK_F7;
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case mgl::Keyboard::F8: return XK_F8;
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case mgl::Keyboard::F9: return XK_F9;
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case mgl::Keyboard::F10: return XK_F10;
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default: return None;
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}
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}
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static uint32_t mgl_key_modifiers_to_x11_modifier_mask(const mgl::Event::KeyEvent &key_event) {
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uint32_t mask = 0;
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if(key_event.shift)
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mask |= ShiftMask;
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if(key_event.control)
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mask |= ControlMask;
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if(key_event.alt)
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mask |= Mod1Mask;
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if(key_event.system)
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mask |= Mod4Mask;
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return mask;
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}
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static uint32_t modifiers_to_x11_modifiers(uint32_t modifiers) {
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uint32_t result = 0;
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if(modifiers & HOTKEY_MOD_LSHIFT)
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result |= ShiftMask;
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if(modifiers & HOTKEY_MOD_RSHIFT)
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result |= ShiftMask;
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if(modifiers & HOTKEY_MOD_LCTRL)
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result |= ControlMask;
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if(modifiers & HOTKEY_MOD_RCTRL)
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result |= ControlMask;
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if(modifiers & HOTKEY_MOD_LALT)
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result |= Mod1Mask;
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if(modifiers & HOTKEY_MOD_RALT)
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result |= Mod5Mask;
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if(modifiers & HOTKEY_MOD_LSUPER)
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result |= Mod4Mask;
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if(modifiers & HOTKEY_MOD_RSUPER)
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result |= Mod4Mask;
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return result;
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}
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GlobalHotkeysX11::GlobalHotkeysX11() {
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dpy = XOpenDisplay(NULL);
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if(!dpy)
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fprintf(stderr, "GlobalHotkeysX11 error: failed to connect to X11 server, global hotkeys wont be available\n");
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}
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GlobalHotkeysX11::~GlobalHotkeysX11() {
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if(dpy) {
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XCloseDisplay(dpy);
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dpy = nullptr;
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}
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}
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bool GlobalHotkeysX11::bind_key_press(Hotkey hotkey, const std::string &id, GlobalHotkeyCallback callback) {
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if(!dpy)
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return false;
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auto it = bound_keys_by_id.find(id);
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if(it != bound_keys_by_id.end())
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return false;
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x_failed = false;
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XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
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const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(hotkey.modifiers);
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unsigned int numlock_mask = x11_get_numlock_mask(dpy);
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unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
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for(int i = 0; i < 4; ++i) {
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XGrabKey(dpy, XKeysymToKeycode(dpy, hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy), False, GrabModeAsync, GrabModeAsync);
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}
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XSync(dpy, False);
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if(x_failed) {
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for(int i = 0; i < 4; ++i) {
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XUngrabKey(dpy, XKeysymToKeycode(dpy, hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
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}
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XSync(dpy, False);
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XSetErrorHandler(prev_xerror);
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return false;
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} else {
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XSetErrorHandler(prev_xerror);
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bound_keys_by_id[id] = { hotkey, std::move(callback) };
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return true;
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}
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}
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void GlobalHotkeysX11::unbind_key_press(const std::string &id) {
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if(!dpy)
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return;
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auto it = bound_keys_by_id.find(id);
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if(it == bound_keys_by_id.end())
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return;
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x_failed = false;
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XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
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const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(it->second.hotkey.modifiers);
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unsigned int numlock_mask = x11_get_numlock_mask(dpy);
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unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
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for(int i = 0; i < 4; ++i) {
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XUngrabKey(dpy, XKeysymToKeycode(dpy, it->second.hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
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}
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XSync(dpy, False);
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XSetErrorHandler(prev_xerror);
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bound_keys_by_id.erase(id);
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}
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void GlobalHotkeysX11::unbind_all_keys() {
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if(!dpy)
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return;
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x_failed = false;
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XErrorHandler prev_xerror = XSetErrorHandler(xerror_grab_error);
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unsigned int numlock_mask = x11_get_numlock_mask(dpy);
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unsigned int modifiers[] = { 0, LockMask, numlock_mask, numlock_mask|LockMask };
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for(auto it = bound_keys_by_id.begin(); it != bound_keys_by_id.end();) {
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const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(it->second.hotkey.modifiers);
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for(int i = 0; i < 4; ++i) {
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XUngrabKey(dpy, XKeysymToKeycode(dpy, it->second.hotkey.key), modifiers_x11 | modifiers[i], DefaultRootWindow(dpy));
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}
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}
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bound_keys_by_id.clear();
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XSync(dpy, False);
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XSetErrorHandler(prev_xerror);
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}
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void GlobalHotkeysX11::poll_events() {
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if(!dpy)
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return;
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while(XPending(dpy)) {
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XNextEvent(dpy, &xev);
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if(xev.type == KeyPress) {
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const KeySym key_sym = XLookupKeysym(&xev.xkey, 0);
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call_hotkey_callback({ (uint32_t)key_sym, xev.xkey.state });
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}
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}
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}
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bool GlobalHotkeysX11::on_event(mgl::Event &event) {
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if(event.type != mgl::Event::KeyPressed)
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return true;
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// 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
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const KeySym key_sym = mgl_key_to_key_sym(event.key.code);
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const uint32_t modifiers = mgl_key_modifiers_to_x11_modifier_mask(event.key);
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return !call_hotkey_callback(Hotkey{(uint32_t)key_sym, modifiers});
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}
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static unsigned int key_state_without_locks(unsigned int key_state) {
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return key_state & ~(Mod2Mask|LockMask);
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}
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bool GlobalHotkeysX11::call_hotkey_callback(Hotkey hotkey) const {
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const uint32_t modifiers_x11 = modifiers_to_x11_modifiers(hotkey.modifiers);
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for(const auto &[key, val] : bound_keys_by_id) {
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if(val.hotkey.key == hotkey.key && key_state_without_locks(modifiers_to_x11_modifiers(val.hotkey.modifiers)) == key_state_without_locks(modifiers_x11)) {
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val.callback(key);
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return true;
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}
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}
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return false;
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}
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}
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