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/*
* Copyright notice...
*/
#include "ctwm.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/extensions/Xrandr.h>
#include "r_area_list.h"
#include "r_area.h"
#include "r_layout.h"
#include "xrandr.h"
/**
* Use XRANDR to figure out how our monitors are laid out.
*/
RLayout *
XrandrNewLayout(Display *disp, Window rootw)
{
int i_nmonitors = 0;
XRRMonitorInfo *ps_monitors;
char **monitor_names;
RAreaList *areas;
int evt_base, err_base, ver_maj, ver_min;
// XXX *_base and ver_* should move more globally if we start doing
// randr stuff anywhere else.
// If the server doesn't talk RANDR, we have nothing to do.
if(XRRQueryExtension(disp, &evt_base, &err_base) != True) {
// No RANDR
#ifdef DEBUG
fprintf(stderr, "No RANDR on the server.\n");
#endif
return NULL;
}
// XRRGetMonitors() wraps the RRGetMonitors request, which requires
// 1.5.
if(XRRQueryVersion(disp, &ver_maj, &ver_min) == 0) {
// Couldn't get the version
#ifdef DEBUG
fprintf(stderr, "Couldn't get server RANDR version.\n");
#endif
return NULL;
}
if(ver_maj < 1 || (ver_maj == 1 && ver_min < 5)) {
#ifdef DEBUG
fprintf(stderr, "Server has RANDR %d.%d, we need 1.5+.\n",
ver_maj, ver_min);
#endif
return NULL;
}
// RANDR 1.5 function to get info about 'em.
ps_monitors = XRRGetMonitors(disp, rootw, 1, &i_nmonitors);
if(ps_monitors == NULL || i_nmonitors == 0) {
fprintf(stderr, "XRRGetMonitors failed\n");
return NULL;
}
// Useful note: vtwm also apparently has RANDR support. It uses
// XRRGetScreenResources() and looping XRRGetCrtcInfo() to load info
// about the screen, and its conditionals suggest that's RANDR 1.2.
// Look into that if we decide to worry about earlier versions.
// Add space for all their names (plus trailing NULL)
monitor_names = calloc((i_nmonitors + 1), sizeof(char *));
if(monitor_names == NULL) {
abort();
}
// Add each and its name into an RAreaList
areas = RAreaListNew(i_nmonitors, NULL);
for(int i = 0; i < i_nmonitors; i++) {
RArea cur_area = RAreaNew(ps_monitors[i].x,
ps_monitors[i].y,
ps_monitors[i].width,
ps_monitors[i].height);
char *name = XGetAtomName(disp, ps_monitors[i].name);
#ifdef DEBUG
fprintf(stderr, "NEW area: %s%s",
name != NULL ? name : "",
name != NULL ? ":" : "");
RAreaPrint(&cur_area);
fprintf(stderr, "\n");
#endif
if(name != NULL) {
monitor_names[i] = strdup(name);
XFree(name);
}
else {
monitor_names[i] = strdup("");
}
RAreaListAdd(areas, &cur_area);
}
XRRFreeMonitors(ps_monitors);
// Build up an RLayout of those areas and their names, and hand it
// back.
return RLayoutSetMonitorsNames(RLayoutNew(areas), monitor_names);
}
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