static void kvi_ipcLoadAtoms()
{
if(g_bIpcAtomsLoaded)
return;
g_bIpcAtomsLoaded = true;
g_uLocalInstanceId = (kvi_u64_t)::getpid();
kvi_sentinel_id.sprintf("pane tonno e mistero - %d", getuid());
kvi_atom_ipc_sentinel_window = XInternAtom(kvi_ipc_get_xdisplay(), "XA_KVI4_IPC_SENTINEL_WINDOW", False);
kvi_atom_ipc_remote_command = XInternAtom(kvi_ipc_get_xdisplay(), "XA_KVI4_IPC_REMOTE_COMMAND", False);
kvi_atom_ipc_remote_message = XInternAtom(kvi_ipc_get_xdisplay(), "XA_KVI4_IPC_REMOTE_MESSAGE", False);
}
bool kvi_sendIpcMessage(const char * message)
{
#if defined(COMPILE_ON_WINDOWS) || defined(COMPILE_ON_MINGW)
HWND hSentinel = kvi_win_findIpcSentinel();
if(hSentinel != NULL)
{
COPYDATASTRUCT cpd;
cpd.cbData = strlen(message)+1;
cpd.dwData = KVI_WINDOWS_IPC_MESSAGE;
cpd.lpData = (void *)message;
DWORD_PTR dwResult;
if(!::SendMessageTimeout(hSentinel,WM_COPYDATA,(WPARAM)NULL,(LPARAM)&cpd,SMTO_BLOCK,1000,&dwResult))
{
qDebug("Failed to send IPC message: error code 0x%x",::GetLastError());
}
return true;
}
#else
#if defined(COMPILE_X11_SUPPORT) && defined(COMPILE_QX11INFO_SUPPORT)
kvi_ipcLoadAtoms();
Window sentinel = kvi_x11_findIpcSentinel(kvi_ipc_get_xrootwin());
if(sentinel != 0)
{
// XChangeProperty(kvi_ipc_get_xdisplay(),sentinel,kvi_atom_ipc_remote_command,XA_STRING,8,
// PropModeReplace,(const unsigned char *)message,kvi_strLen(message));
kvi_ipcSetRemoteCommand(sentinel,message);
#if (QT_VERSION < 0x050000)
XEvent e;
KviMemory::set(&e,0,sizeof(XEvent));
e.type = ClientMessage;
e.xclient.display = kvi_ipc_get_xdisplay();
e.xclient.window = sentinel;
e.xclient.message_type = kvi_atom_ipc_remote_message;
e.xclient.format = 8;
Status ret = XSendEvent(kvi_ipc_get_xdisplay(),sentinel,False,0,&e);
#else
// On Qt5 the ClientMessage events aren't propagated at all.. we have to rely on the property change only
#endif
return true;
}
#endif //!COMPILE_NO_X
#endif
return false;
}
bool KviIpcSentinel::x11GetRemoteMessage()
{
Atom type;
int format;
unsigned long nItems, after;
unsigned char * data = nullptr;
KviCString szData;
if(XGetWindowProperty(kvi_ipc_get_xdisplay(), winId(), kvi_atom_ipc_remote_command,
0, 1024, false, XA_STRING, &type, &format, &nItems, &after, &data) == Success)
{
if((type == XA_STRING) && (format == 8) && (nItems > 8) && data)
{
kvi_u32_t uSenderId = *((kvi_u32_t *)(data));
if(uSenderId != g_uLocalInstanceId)
szData = (char *)(data + 8);
XFree((char *)data);
}
}
if(szData.isEmpty())
return false; // no command, or our own command
kvi_ipcSetRemoteCommand(winId(), "");
if(g_pApp)
g_pApp->ipcMessage(szData.ptr());
return true;
}
KviIpcSentinel::KviIpcSentinel()
: QWidget(0)
{
setObjectName("kvirc4_ipc_sentinel");
#if defined(COMPILE_ON_WINDOWS) || defined(COMPILE_ON_MINGW)
setWindowTitle("kvirc4_ipc_sentinel");
setWindowFlags(Qt::FramelessWindowHint);
#else
#if defined(COMPILE_X11_SUPPORT) && defined(COMPILE_QX11INFO_SUPPORT)
kvi_ipcLoadAtoms();
XChangeProperty(kvi_ipc_get_xdisplay(),winId(),kvi_atom_ipc_sentinel_window,XA_STRING,8,
PropModeReplace,(const unsigned char *)kvi_sentinel_id.ptr(),kvi_sentinel_id.len());
kvi_ipcSetRemoteCommand(winId(),"");
#endif //!COMPILE_NO_X
#endif
move(-50,-50);
resize(1,1);
#if defined(COMPILE_ON_WINDOWS) || defined(COMPILE_ON_MINGW)
// we need to show the window once otherwise it will never get "realized"
// and we will not be able to find it via FindWindow()
show();
#endif
hide();
}
static Window kvi_x11_findIpcSentinel(Window win)
{
Atom type;
int format;
unsigned long nItems, after;
unsigned char * data = nullptr;
if(XGetWindowProperty(kvi_ipc_get_xdisplay(), win, kvi_atom_ipc_sentinel_window,
0, 32, false, XA_STRING, &type, &format, &nItems, &after, &data) == Success)
{
if((type == XA_STRING) && (format == 8))
{
if((nItems == ((unsigned long)(kvi_sentinel_id.len()))) && data)
{
if(kvi_strEqualCSN((const char *)data, kvi_sentinel_id.ptr(), kvi_sentinel_id.len()))
{
XFree((char *)data);
return win;
}
}
}
}
Window root, parent;
Window * children;
unsigned int nChildren;
if(!XQueryTree(kvi_ipc_get_xdisplay(), win, &root, &parent, &children, &nChildren))
{
if(children)
XFree((char *)children);
return 0;
}
Window found = 0;
for(size_t i = 0; !found && i < nChildren; ++i)
found = kvi_x11_findIpcSentinel(children[i]);
if(children)
XFree((char *)children);
return found;
}
static void kvi_ipcSetRemoteCommand(Window w, const char * command)
{
if(!command)
return;
int len = kvi_strLen(command) + 1;
char * buffer = (char *)::malloc(len + 8);
*((kvi_u64_t *)buffer) = g_uLocalInstanceId;
::memcpy(buffer + 8, command, len);
XChangeProperty(kvi_ipc_get_xdisplay(), w, kvi_atom_ipc_remote_command,
XA_STRING, 8, PropModeReplace, (const unsigned char *)buffer, len + 8);
::free(buffer);
}
