111 lines
2.0 KiB
C
111 lines
2.0 KiB
C
#include "datetime.h"
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#include "atoms.h"
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#include <pthread.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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#define BUFFER_SIZE 32
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static void *run(void *vargp);
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static const char *const default_text = "date & time";
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static pthread_mutex_t mutex;
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static bool running = false;
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static Display *display = None;
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static Atoms atoms = NULL;
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static pthread_t thread;
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static bool thread_created = false;
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static char buffer[BUFFER_SIZE];
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void datetime_lock()
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{
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pthread_mutex_lock(&mutex);
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}
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void datetime_unlock()
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{
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pthread_mutex_unlock(&mutex);
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}
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const char *datetime_get()
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{
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return buffer;
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}
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bool datetime_start()
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{
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datetime_lock();
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if (running) return false;
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running = true;
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strcpy(buffer, default_text);
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if ((display = XOpenDisplay(NULL)) == NULL) return false;
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if ((atoms = atoms_create(display)) == NULL) return false;
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thread_created = pthread_create(&thread, NULL, run, NULL) == 0;
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datetime_unlock();
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return thread_created;
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}
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void datetime_stop()
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{
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datetime_lock();
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if (!running) return;
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running = false;
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if (thread_created) pthread_join(thread, NULL);
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if (atoms != NULL) atoms_destroy(atoms);
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if (display != None) XCloseDisplay(display);
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datetime_unlock();
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}
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void *run(void *vargp)
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{
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while (running) {
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time_t raw_time;
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time(&raw_time);
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const struct tm *const time_info = localtime(&raw_time);
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datetime_lock();
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strftime(buffer, sizeof(buffer), "%a, %e %b %Y, %H:%M:%S", time_info);
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datetime_unlock();
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XEvent event;
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memset(&event, 0, sizeof(event));
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event.xclient.type = ClientMessage;
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event.xclient.serial = 0;
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event.xclient.send_event = True;
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event.xclient.display = display;
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event.xclient.window = DefaultRootWindow(display);
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event.xclient.message_type = atoms->netatom[NetDateTime];
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event.xclient.format = 32;
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XSendEvent(
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display,
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event.xclient.window,
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False,
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SubstructureRedirectMask | SubstructureNotifyMask,
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&event
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);
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XFlush(display);
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sleep(1);
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}
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return NULL;
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}
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