gri3-wm/include/libi3.h

/*
 * vim:ts=4:sw=4:expandtab
 */

#ifndef _LIBI3_H
#define _LIBI3_H

#include <stdarg.h>
#include <xcb/xcb.h>
#include <xcb/xproto.h>

/**
 * Try to get the socket path from X11 and return NULL if it doesn’t work.
 *
 * The memory for the socket path is dynamically allocated and has to be
 * free()d by the caller.
 *
 */
char *socket_path_from_x11();

/**
 * Safe-wrapper around malloc which exits if malloc returns NULL (meaning that
 * there is no more memory available)
 *
 */
void *smalloc(size_t size);

/**
 * Safe-wrapper around calloc which exits if malloc returns NULL (meaning that
 * there is no more memory available)
 *
 */
void *scalloc(size_t size);

/**
 * Safe-wrapper around realloc which exits if realloc returns NULL (meaning
 * that there is no more memory available).
 *
 */
void *srealloc(void *ptr, size_t size);

/**
 * Safe-wrapper around strdup which exits if malloc returns NULL (meaning that
 * there is no more memory available)
 *
 */
char *sstrdup(const char *str);

/**
 * Safe-wrapper around asprintf which exits if it returns -1 (meaning that
 * there is no more memory available)
 *
 */
int sasprintf(char **strp, const char *fmt, ...);

/**
 * Connects to the i3 IPC socket and returns the file descriptor for the
 * socket. die()s if anything goes wrong.
 *
 */
int ipc_connect(const char *socket_path);

/**
 * Formats a message (payload) of the given size and type and sends it to i3 via
 * the given socket file descriptor.
 *
 * Returns -1 when write() fails, errno will remain.
 * Returns 0 on success.
 *
 */
int ipc_send_message(int sockfd, uint32_t message_size,
                     uint32_t message_type, const uint8_t *payload);

/**
 * Reads a message from the given socket file descriptor and stores its length
 * (reply_length) as well as a pointer to its contents (reply).
 *
 * Returns -1 when read() fails, errno will remain.
 * Returns -2 when the IPC protocol is violated (invalid magic, unexpected
 * message type, EOF instead of a message). Additionally, the error will be
 * printed to stderr.
 * Returns 0 on success.
 *
 */
int ipc_recv_message(int sockfd, uint32_t message_type,
                     uint32_t *reply_length, uint8_t **reply);

/**
 * Generates a configure_notify event and sends it to the given window
 * Applications need this to think they’ve configured themselves correctly.
 * The truth is, however, that we will manage them.
 *
 */
void fake_configure_notify(xcb_connection_t *conn, xcb_rectangle_t r, xcb_window_t window, int border_width);

/**
 * Returns the colorpixel to use for the given hex color (think of HTML). Only
 * works for true-color (vast majority of cases) at the moment, avoiding a
 * roundtrip to X11.
 *
 * The hex_color has to start with #, for example #FF00FF.
 *
 * NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
 * This has to be done by the caller.
 *
 * NOTE that this function may in the future rely on a global xcb_connection_t
 * variable called 'conn' to be present.
 *
 */
uint32_t get_colorpixel(const char *hex) __attribute__((const));

#if defined(__APPLE__)

/*
 * Taken from FreeBSD
 * Returns a pointer to a new string which is a duplicate of the
 * string, but only copies at most n characters.
 *
 */
char *strndup(const char *str, size_t n);

#endif

#endif