/
compmgr.cpp
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/
compmgr.cpp
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#include "compmgr.h"
#include "workspace.h"
#include "atoms.h"
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xcomposite.h>
#include <stdio.h>
typedef struct _ignore {
struct _ignore* next;
unsigned long sequence;
} ignore;
Display *dpy;
static int composite_opcode;
static ignore* ignore_head, **ignore_tail = &ignore_head;
static int render_event, render_error;
static int xfixes_event, xfixes_error;
static int damage_event, damage_error;
static void discard_ignore (Display *dpy, unsigned long sequence)
{
while (ignore_head)
{
if ((long) (sequence - ignore_head->sequence) > 0)
{
ignore *next = ignore_head->next;
free (ignore_head);
ignore_head = next;
if (!ignore_head)
ignore_tail = &ignore_head;
}
else
break;
}
}
static int should_ignore (Display *dpy, unsigned long sequence)
{
discard_ignore (dpy, sequence);
return ignore_head && ignore_head->sequence == sequence;
}
static int error (Display *dpy, XErrorEvent *ev)
{
int o;
const char* name = NULL;
static char buffer[256];
if (should_ignore (dpy, ev->serial))
return 0;
if (ev->request_code == composite_opcode && ev->minor_code == X_CompositeRedirectSubwindows)
{
fprintf (stderr, "Another composite manager is already running\n");
exit (1);
}
o = ev->error_code - xfixes_error;
switch (o) {
case BadRegion: name = "BadRegion"; break;
default: break;
}
o = ev->error_code - damage_error;
switch (o) {
case BadDamage: name = "BadDamage"; break;
default: break;
}
o = ev->error_code - render_error;
switch (o) {
case BadPictFormat: name ="BadPictFormat"; break;
case BadPicture: name ="BadPicture"; break;
case BadPictOp: name ="BadPictOp"; break;
case BadGlyphSet: name ="BadGlyphSet"; break;
case BadGlyph: name ="BadGlyph"; break;
default: break;
}
if (name == NULL)
{
buffer[0] = '\0';
XGetErrorText (dpy, ev->error_code, buffer, sizeof (buffer));
name = buffer;
}
fprintf (stderr, "error %d: %s request %d minor %d serial %lu\n",
ev->error_code, (strlen (name) > 0) ? name : "unknown",
ev->request_code, ev->minor_code, ev->serial);
/* abort (); this is just annoying to most people */
return 0;
}
static bool register_cm(Display* dpy)
{
Window w;
Atom a;
a = XInternAtom (dpy, "_NET_WM_CM_S0", False);
w = XGetSelectionOwner (dpy, a);
if (w != None)
{
XTextProperty tp;
char **strs;
int count;
Atom winNameAtom = XInternAtom (dpy, "_NET_WM_NAME", False);
if (!XGetTextProperty (dpy, w, &tp, winNameAtom) && !XGetTextProperty (dpy, w, &tp, XA_WM_NAME))
{
fprintf (stderr, "Another composite manager is already running (0x%lx)\n", (unsigned long) w);
return false;
}
if (XmbTextPropertyToTextList (dpy, &tp, &strs, &count) == Success)
{
fprintf (stderr, "Another composite manager is already running (%s)\n", strs[0]);
XFreeStringList (strs);
}
XFree (tp.value);
return false;
}
w = XCreateSimpleWindow (dpy, RootWindow (dpy, 0), 0, 0, 1, 1, 0, None, None);
Xutf8SetWMProperties (dpy, w, "xcompmgr", "xcompmgr", NULL, 0, NULL, NULL, NULL);
XSetSelectionOwner (dpy, a, w, 0);
return true;
}
void CompMgr::run()
{
dpy = XOpenDisplay(0);
::createAtomList();
XSetErrorHandler (error);
if (!XRenderQueryExtension (dpy, &render_event, &render_error))
{
fprintf (stderr, "No render extension\n");
return;
}
if (!XDamageQueryExtension (dpy, &damage_event, &damage_error))
{
fprintf (stderr, "No damage extension\n");
return;
}
if (!XFixesQueryExtension (dpy, &xfixes_event, &xfixes_error))
{
fprintf (stderr, "No XFixes extension\n");
return;
}
if (!register_cm(dpy))
return;
Workspace* workspace = Workspace::instance();
qDebug("Composite Manager started.");
while (!m_stop)
{
XEvent event;
XNextEvent( dpy, &event );
workspace->x11Event( &event );
}
qDebug("Composite Manager stopped.");
delete workspace;
XCloseDisplay (dpy);
}