monitors.c File Reference

#include "monitors.h"
#include <X11/Xlib.h>
#include <stdlib.h>
#include <string.h>
#include "../env_settings.h"
#include "../logging.h"

Macros
#define	CLAMP(x, mi, ma)   ((x) < (mi) ? (mi) : (x) > (ma) ? (ma) : (x))

Functions
static int	CompareMonitors (const void *a, const void *b)
static int	IntervalsOverlap (int astart, int asize, int bstart, int bsize)
static void	AddMonitor (Monitor *out_monitors, size_t *num_monitors, size_t max_monitors, int x, int y, int w, int h)
static void	GetMonitorsGuess (const XWindowAttributes *xwa, Monitor *out_monitors, size_t *out_num_monitors, size_t max_monitors)
size_t	GetMonitors (Display *dpy, Window window, Monitor *out_monitors, size_t max_monitors)
	Queries the current monitor configuration. More...
void	SelectMonitorChangeEvents (Display *dpy, Window window)
	Enable receiving monitor change events for the given display at w. More...
int	IsMonitorChangeEvent (Display *dpy, int type)
	Returns the event type that indicates a change to the monitor configuration. More...

Macro Definition Documentation

CLAMP

#define CLAMP	(		x,
			mi,
			ma
	)		((x) < (mi) ? (mi) : (x) > (ma) ? (ma) : (x))

Function Documentation

AddMonitor()

static void AddMonitor ( Monitor *  out_monitors, size_t *  num_monitors, size_t  max_monitors, int  x, int  y, int  w, int  h  )

static

CompareMonitors()

static int CompareMonitors ( const void *  a, const void *  b  )

static

GetMonitors()

size_t GetMonitors	(	Display *	dpy,
		Window	window,
		Monitor *	out_monitors,
		size_t	max_monitors
	)

Queries the current monitor configuration.

Note: out_monitors will be zero padded and sorted in some deterministic order so memcmp can be used to check if the monitor configuration has actually changed.

Parameters

dpy	The current display.
w	The window this application intends to draw in.
out_monitors	A pointer to an array that will receive the monitor configuration (in coordinates relative and clipped to the window w.
max_monitors	The size of the array.

Returns

The number of monitors returned in the array.

GetMonitorsGuess()

static void GetMonitorsGuess ( const XWindowAttributes *  xwa, Monitor *  out_monitors, size_t *  out_num_monitors, size_t  max_monitors  )

static

IntervalsOverlap()

static int IntervalsOverlap ( int  astart, int  asize, int  bstart, int  bsize  )

static

IsMonitorChangeEvent()

int IsMonitorChangeEvent	(	Display *	dpy,
		int	type
	)

Returns the event type that indicates a change to the monitor configuration.

Parameters

dpy	The current display.
type	The received event type.

Returns

1 if the received event is a monitor change event and GetMonitors should be called, or 0 otherwise.

SelectMonitorChangeEvents()

void SelectMonitorChangeEvents	(	Display *	dpy,
		Window	window
	)

Enable receiving monitor change events for the given display at w.