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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <unistd.h>
typedef struct Command {
char* command;
unsigned int mode;
int persist;
} Command;
typedef struct Key {
unsigned int mod;
KeySym key;
Command command;
} Key;
typedef struct ModeProperties {
char* label;
} ModeProperties;
#define NormalMode -1
#define cmd(c) (Command) { c, NormalMode, False }
#define mode(m, p) (Command) { NULL, m, p }
#include "config.h"
#define LENGTH(X) (sizeof X / sizeof X[0])
#define CLEANMASK(mask) (mask & ~LockMask & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
int current_mode = NormalMode;
int is_mode_persistent = 0;
extern char** environ;
void bind_key(Display *dpy, Window win, unsigned int mod, KeySym key) {
int keycode = XKeysymToKeycode(dpy, key);
XGrabKey(dpy, keycode, mod, win, False, GrabModeAsync, GrabModeAsync);
}
void unbind_key(Display *dpy, Window win, unsigned int mod, KeySym key) {
int keycode = XKeysymToKeycode(dpy, key);
XUngrabKey(dpy, keycode, mod, win);
}
int error_handler(Display *disp, XErrorEvent *xe) {
switch(xe->error_code) {
case BadAccess:
printf("hotkeythingy: [BadAccess] Cant grab key binding. Already grabbed\n");
return 0;
}
printf("hotkeythingy: Something went wrong\n");
return 1;
}
void spawn(char** command) {
if (fork() == 0) {
setsid();
execve(command[0], command, environ);
fprintf(stderr, "hotkeythingy: execve %s", command[0]);
perror(" failed");
exit(0);
}
}
char* get_mode_label() {
if (current_mode == NormalMode) return "";
if (LENGTH(mode_properties) <= current_mode) return "";
ModeProperties props = mode_properties[current_mode];
return props.label;
}
void handle_mode_change() {
char str[255];
sprintf(str, "%d", current_mode);
setenv("MODE_ID", str, 1);
sprintf(str, "%s", get_mode_label());
setenv("MODE_LABEL", str, 1);
char* cmd[] = {shell, "-c", on_mode_change, NULL};
spawn(cmd);
}
void run(Display* dpy, Window win, Command command) {
Key mode_key;
unsigned int i;
if (command.command) {
char* cmd[] = {shell, "-c", command.command, NULL};
spawn(cmd);
} else if(command.mode != NormalMode) {
current_mode = command.mode;
is_mode_persistent = command.persist;
if (modes[current_mode] && current_mode < LENGTH(modes)) {
for (i = 0; i < LENGTH(modes[current_mode]); i++) {
mode_key = modes[current_mode][i];
bind_key(dpy, win, mode_key.mod, mode_key.key);
}
}
// Bind an escape key to quit mode
bind_key(dpy, win, 0, XK_Escape);
handle_mode_change();
}
}
void keypress(Display *dpy, Window win, XKeyEvent *ev) {
unsigned int i;
Key mode_key;
KeySym keysym = XKeycodeToKeysym(dpy, (KeyCode) ev->keycode, 0);
if (current_mode == NormalMode) {
// Bind all the normal mode keys
for (i = 0; i < LENGTH(keys); i++) {
if (keysym == keys[i].key && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)) {
run(dpy, win, keys[i].command);
}
}
} else {
// Escape key
is_mode_persistent = is_mode_persistent && ev->keycode != 9;
if (modes[current_mode] && current_mode < LENGTH(modes)) {
// Check if key is in mode and execute
for (i = 0; i < LENGTH(modes[current_mode]); i++) {
mode_key = modes[current_mode][i];
if (keysym == mode_key.key && CLEANMASK(mode_key.mod) == CLEANMASK(ev->state)) {
run(dpy, win, mode_key.command);
}
}
if (!is_mode_persistent) {
// Unbind mode related keys
for (i = 0; i < LENGTH(modes[current_mode]); i++) {
mode_key = modes[current_mode][i];
unbind_key(dpy, win, mode_key.mod, mode_key.key);
}
// Unbind escape key
unbind_key(dpy, win, 0, XK_Escape);
}
}
if (!is_mode_persistent) {
current_mode = NormalMode;
is_mode_persistent = False;
handle_mode_change();
}
}
}
int main() {
XSetErrorHandler(error_handler);
int running = 1, i = 0;
Display *dpy = XOpenDisplay(0);
Window root = DefaultRootWindow(dpy);
// Grab keys
for (i = 0; i < LENGTH(keys); i++) {
bind_key(dpy, root, keys[i].mod, keys[i].key);
}
XSelectInput(dpy, root, KeyPressMask);
handle_mode_change();
/* main event loop */
XEvent ev;
XSync(dpy, False);
while (running) {
XMaskEvent(dpy, KeyPressMask, &ev);
switch (ev.type) {
case KeyPress: {
keypress(dpy, root, &ev.xkey);
break;
}
}
}
XCloseDisplay(dpy);
}
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