i3
Macros | Functions
util.h File Reference
#include <err.h>
#include "data.h"
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Macros

#define die(...)   errx(EXIT_FAILURE, __VA_ARGS__);
 
#define exit_if_null(pointer,...)   { if (pointer == NULL) die(__VA_ARGS__); }
 
#define STARTS_WITH(string, needle)   (strncasecmp(string, needle, strlen(needle)) == 0)
 
#define CIRCLEQ_NEXT_OR_NULL(head, elm, field)
 
#define CIRCLEQ_PREV_OR_NULL(head, elm, field)
 
#define FOR_TABLE(workspace)
 
#define NODES_FOREACH(head)
 
#define NODES_FOREACH_REVERSE(head)
 
#define GREP_FIRST(dest, head, condition)
 
#define FREE(pointer)
 
#define CALL(obj, member,...)   obj->member(obj, ## __VA_ARGS__)
 

Functions

int min (int a, int b)
 
int max (int a, int b)
 
bool rect_contains (Rect rect, uint32_t x, uint32_t y)
 
Rect rect_add (Rect a, Rect b)
 
bool update_if_necessary (uint32_t *destination, const uint32_t new_value)
 Updates *destination with new_value and returns true if it was changed or false if it was the same. More...
 
void exec_i3_utility (char *name, char *argv[])
 exec()s an i3 utility, for example the config file migration script or i3-nagbar. More...
 
void check_error (xcb_connection_t *conn, xcb_void_cookie_t cookie, char *err_message)
 Checks a generic cookie for errors and quits with the given message if there was an error. More...
 
char * resolve_tilde (const char *path)
 This function resolves ~ in pathnames. More...
 
bool path_exists (const char *path)
 Checks if the given path exists by calling stat(). More...
 
void i3_restart (bool forget_layout)
 Restart i3 in-place appends -a to argument list to disable autostart. More...
 
void start_nagbar (pid_t *nagbar_pid, char *argv[])
 Starts an i3-nagbar instance with the given parameters. More...
 
void kill_nagbar (pid_t *nagbar_pid, bool wait_for_it)
 Kills the i3-nagbar process, if *nagbar_pid != -1. More...
 

Macro Definition Documentation

#define CALL (   obj,
  member,
  ... 
)    obj->member(obj, ## __VA_ARGS__)
#define CIRCLEQ_NEXT_OR_NULL (   head,
  elm,
  field 
)
Value:
(CIRCLEQ_NEXT(elm, field) != CIRCLEQ_END(head) ? \
CIRCLEQ_NEXT(elm, field) : NULL)

Definition at line 21 of file util.h.

#define CIRCLEQ_PREV_OR_NULL (   head,
  elm,
  field 
)
Value:
(CIRCLEQ_PREV(elm, field) != CIRCLEQ_END(head) ? \
CIRCLEQ_PREV(elm, field) : NULL)

Definition at line 23 of file util.h.

#define die (   ...)    errx(EXIT_FAILURE, __VA_ARGS__);

Definition at line 18 of file util.h.

Referenced by get_config_path(), get_first_output(), main(), parse_file(), and resolve_tilde().

#define exit_if_null (   pointer,
  ... 
)    { if (pointer == NULL) die(__VA_ARGS__); }

Definition at line 19 of file util.h.

#define FOR_TABLE (   workspace)
Value:
for (int cols = 0; cols < (workspace)->cols; cols++) \
for (int rows = 0; rows < (workspace)->rows; rows++)

Definition at line 25 of file util.h.

#define FREE (   pointer)
#define GREP_FIRST (   dest,
  head,
  condition 
)
#define NODES_FOREACH (   head)
Value:
for (Con *child = (Con*)-1; (child == (Con*)-1) && ((child = 0), true);) \
TAILQ_FOREACH(child, &((head)->nodes_head), nodes)

Definition at line 29 of file util.h.

Referenced by workspace_next(), and workspace_next_on_output().

#define NODES_FOREACH_REVERSE (   head)
Value:
for (Con *child = (Con*)-1; (child == (Con*)-1) && ((child = 0), true);) \
TAILQ_FOREACH_REVERSE(child, &((head)->nodes_head), nodes_head, nodes)

Definition at line 33 of file util.h.

Referenced by workspace_prev(), and workspace_prev_on_output().

#define STARTS_WITH (   string,
  needle 
)    (strncasecmp(string, needle, strlen(needle)) == 0)

Definition at line 20 of file util.h.

Function Documentation

void check_error ( xcb_connection_t *  conn,
xcb_void_cookie_t  cookie,
char *  err_message 
)

Checks a generic cookie for errors and quits with the given message if there was an error.

Definition at line 113 of file util.c.

Referenced by main().

void exec_i3_utility ( char *  name,
char *  argv[] 
)

exec()s an i3 utility, for example the config file migration script or i3-nagbar.

This function first searches $PATH for the given utility named, then falls back to the dirname() of the i3 executable path and then falls back to the dirname() of the target of /proc/self/exe (on linux).

This function should be called after fork()ing.

The first argument of the given argv vector will be overwritten with the executable name, so pass NULL.

If the utility cannot be found in any of these locations, it exits with return code 2.

Definition at line 76 of file util.c.

References sasprintf(), and start_argv.

Referenced by migrate_config(), and start_nagbar().

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void i3_restart ( bool  forget_layout)

Restart i3 in-place appends -a to argument list to disable autostart.

Definition at line 266 of file util.c.

References append_argument(), command_error_nagbar_pid, config_error_nagbar_pid, ipc_shutdown(), kill_nagbar(), LOG, restore_geometry(), scalloc(), start_argv, and store_restart_layout().

Referenced by cmd_restart(), and sig_handle_key_press().

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void kill_nagbar ( pid_t *  nagbar_pid,
bool  wait_for_it 
)

Kills the i3-nagbar process, if *nagbar_pid != -1.

If wait_for_it is set (restarting i3), this function will waitpid(), otherwise, ev is assumed to handle it (reloading).

Definition at line 431 of file util.c.

Referenced by cmd_reload(), and i3_restart().

int max ( int  a,
int  b 
)

Definition at line 32 of file util.c.

Referenced by con_minimum_size(), DRAGGING_CB(), floating_check_size(), and floating_enable().

int min ( int  a,
int  b 
)
bool path_exists ( const char *  path)

Checks if the given path exists by calling stat().

Definition at line 158 of file util.c.

Referenced by get_config_path(), ipc_create_socket(), and tree_restore().

Rect rect_add ( Rect  a,
Rect  b 
)

Definition at line 43 of file util.c.

References Rect::height, Rect::width, Rect::x, and Rect::y.

Referenced by render_con().

bool rect_contains ( Rect  rect,
uint32_t  x,
uint32_t  y 
)

Definition at line 36 of file util.c.

References Rect::height, Rect::width, Rect::x, and Rect::y.

Referenced by handle_button_press(), handle_enter_notify(), and handle_motion_notify().

char* resolve_tilde ( const char *  path)

This function resolves ~ in pathnames.

It may resolve wildcards in the first part of the path, but if no match or multiple matches are found, it just returns a copy of path as given.

Definition at line 128 of file util.c.

References die, scalloc(), and sstrdup().

Referenced by get_config_path(), ipc_create_socket(), store_restart_layout(), and tree_restore().

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void start_nagbar ( pid_t *  nagbar_pid,
char *  argv[] 
)

Starts an i3-nagbar instance with the given parameters.

Takes care of handling SIGCHLD and killing i3-nagbar when i3 exits.

The resulting PID will be stored in *nagbar_pid and can be used with kill_nagbar() to kill the bar later on.

Definition at line 391 of file util.c.

References DLOG, exec_i3_utility(), main_loop, nagbar_cleanup(), nagbar_exited(), and smalloc().

Referenced by handle_key_press(), and parse_file().

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bool update_if_necessary ( uint32_t *  destination,
const uint32_t  new_value 
)

Updates *destination with new_value and returns true if it was changed or false if it was the same.

Definition at line 55 of file util.c.

Referenced by handle_output(), and randr_query_outputs().