/* audio volume control for x11 (c) firk 2020-2021
   please respect the authorship
   feel free to use this code for anything */
#include <X11/Xlib.h>
#include <X11/extensions/XShm.h>
#include <X11/keysym.h>
#include <X11/XF86keysym.h>
#include "mixer.h"

typedef struct {
  unsigned int keysym;
  unsigned int keycode;
  char const * cmd;
} t_hotkey;

static t_hotkey key_hooks[] = {
  { XF86XK_AudioMute              },
  { XF86XK_AudioLowerVolume       },
  { XF86XK_AudioRaiseVolume       }
};
#define key_hooks_end (key_hooks+sizeof(key_hooks)/sizeof(*key_hooks))

extern void init_key_hooks(void) {
  Display * d;
  Window rootwin;
  t_hotkey * hk;
  
  d = display;
  rootwin = RootWindowOfScreen(screen);
  for(hk=key_hooks; hk<key_hooks_end; hk++) {
    hk->keycode = XKeysymToKeycode(d, hk->keysym);
    if(hk->keycode) XGrabKey(d, hk->keycode, AnyModifier, rootwin, False, GrabModeAsync, GrabModeAsync);
  }
}

extern int key_hook_handler(XEvent * ev) {
  t_hotkey * hk;
  if(ev->type==KeyPress) {
    if(!ev->xkey.keycode) return 0;
    for(hk=key_hooks; hk<key_hooks_end; hk++) if(ev->xkey.keycode==hk->keycode) {
      switch(hk->keysym) {
      case XF86XK_AudioMute: handle_audio_mute(); return 1;
      case XF86XK_AudioLowerVolume: handle_audio_down(); return 1;
      case XF86XK_AudioRaiseVolume: handle_audio_up(); return 1;
      }
      return 1;
    }
  }
  if(ev->type==ButtonPress) {
    switch(ev->xbutton.button) {
    case 1: if(ev->xbutton.x>=0) handle_audio_set(ev->xbutton.x); return 1;
    case 3: handle_audio_mute(); return 1;
    case 5: case 6: handle_audio_down(); return 1;
    case 4: case 7: handle_audio_up(); return 1;
    }
  }
  return 0;
}