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#include <stdlib.h>
#include <assert.h>
#include <X11/XCB/xcb.h>
#include "xcb_property.h"
typedef struct {
CARD32 long_len;
GenericPropertyHandler handler;
void *data;
} propHandler;
typedef struct node node;
struct node {
node *next;
XCBATOM name;
propHandler h;
};
struct PropertyHandlers {
node *head;
propHandler *def;
EventHandlers *evenths;
};
XCBGetPropertyCookie GetAnyProperty(XCBConnection *c, BOOL del, XCBWINDOW window, XCBATOM name, CARD32 long_len)
{
static const XCBATOM type = { XCBGetPropertyTypeAny };
return XCBGetProperty(c, del, window, name, type, 0, long_len);
}
static int callHandler(XCBConnection *c, BYTE state, XCBWINDOW window, XCBATOM atom, propHandler *h)
{
XCBGetPropertyRep *propr = 0;
int ret;
if(state != XCBPropertyDelete)
{
XCBGetPropertyCookie cookie = GetAnyProperty(c, 0, window, atom, h->long_len);
propr = XCBGetPropertyReply(c, cookie, 0);
}
ret = h->handler(h->data, c, state, window, atom, propr);
free(propr);
return ret;
}
int PropertyChanged(PropertyHandlers *prophs, BYTE state, XCBWINDOW window, XCBATOM atom)
{
XCBConnection *c = getXCBConnection(GetPropertyEventHandlers(prophs));
node *cur;
for(cur = prophs->head; cur; cur = cur->next)
if(cur->name.xid == atom.xid)
return callHandler(c, state, window, atom, &cur->h);
if(prophs->def)
return callHandler(c, state, window, atom, prophs->def);
return 0;
}
static int handlePropertyNotifyEvent(void *data, XCBConnection *c, XCBPropertyNotifyEvent *e)
{
PropertyHandlers *prophs = data;
BYTE state = e->state;
XCBWINDOW window = e->window;
XCBATOM atom = e->atom;
return PropertyChanged(prophs, state, window, atom);
}
PropertyHandlers *AllocPropertyHandlers(EventHandlers *evenths)
{
PropertyHandlers *prophs = malloc(sizeof(PropertyHandlers));
if(prophs)
{
prophs->head = 0;
prophs->def = 0;
prophs->evenths = evenths;
setPropertyNotifyEventHandler(evenths, handlePropertyNotifyEvent, prophs);
}
return prophs;
}
void FreePropertyHandlers(PropertyHandlers *prophs)
{
free(prophs);
}
EventHandlers *GetPropertyEventHandlers(PropertyHandlers *prophs)
{
return prophs->evenths;
}
static inline void setPropHandler(propHandler *cur, CARD32 long_len, GenericPropertyHandler handler, void *data)
{
cur->long_len = long_len;
cur->handler = handler;
cur->data = data;
}
int SetPropertyHandler(PropertyHandlers *prophs, XCBATOM name, CARD32 long_len, GenericPropertyHandler handler, void *data)
{
node *cur = malloc(sizeof(node));
if(!cur)
return 0;
cur->next = prophs->head;
cur->name = name;
setPropHandler(&cur->h, long_len, handler, data);
prophs->head = cur;
return 1;
}
int SetDefaultPropertyHandler(PropertyHandlers *prophs, CARD32 long_len, GenericPropertyHandler handler, void *data)
{
assert(!prophs->def);
prophs->def = malloc(sizeof(propHandler));
if(!prophs->def)
return 0;
setPropHandler(prophs->def, long_len, handler, data);
return 1;
}
int rootOfScreen(XCBConnection *c, int screen, XCBWINDOW *root)
{
XCBSCREENIter i = XCBConnSetupSuccessRepRootsIter(XCBGetSetup(c));
if(screen >= i.rem)
return 0;
for(; screen && i.rem; --screen, XCBSCREENNext(&i))
/* empty */;
*root = i.data->root;
return 1;
}
XCBVoidCookie sendToWindow(XCBConnection *c, XCBWINDOW root, const XCBClientMessageEvent *ev)
{
return XCBSendEvent(c, /* propagate */ 0, root, XCBEventMaskSubstructureNotify | XCBEventMaskSubstructureRedirect, (const char *) ev);
}
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