/*
* This procedure is invoked by the various X event loops throughout Vims when
* a property changes on the communication window. This procedure reads the
* property and handles command requests and responses.
*/
static void serverEventProc(VimRemotingClient *client, XEvent *eventPtr)
{
unsigned char *propInfo = NULL;
char *p;
int result, actualFormat, code;
unsigned long numItems, bytesAfter;
Atom actualType;
char *tofree;
if (eventPtr != NULL) {
if (eventPtr->xproperty.atom != client->commProperty
|| eventPtr->xproperty.state != PropertyNewValue)
return;
}
/*
* Read the comm property and delete it.
*/
result = XGetWindowProperty(
client->dpy, client->window, client->commProperty, 0L,
(long)MAX_PROP_WORDS, True, XA_STRING, &actualType,
&actualFormat, &numItems, &bytesAfter, &propInfo);
/* If the property doesn't exist or is improperly formed then ignore it. */
if (result != Success || actualType != XA_STRING || actualFormat != 8) {
if (propInfo)
XFree(propInfo);
return;
}
/*
* Several commands and results could arrive in the property at
* one time; each iteration through the outer loop handles a
* single command or result.
*/
for (p = (char *)propInfo; (p - (char *)propInfo) < numItems; ) {
/*
* Ignore leading NULs; each command or result starts with a
* NUL so that no matter how badly formed a preceding command
* is, we'll be able to tell that a new command/result is
* starting.
*/
if (*p == 0) {
p++;
continue;
}
if (*p == 'r' && p[1] == 0) {
int serial, gotSerial;
char *res;
VimRemotingClient_PendingCommand *pcPtr;
char *enc;
/*
* This is a reply to some command that we sent out. Iterate
* over all of its options. Stop when we reach the end of the
* property or something that doesn't look like an option.
*/
p += 2;
gotSerial = 0;
res = (char *)"";
code = 0;
enc = NULL;
while ((p - (char *)propInfo) < numItems && *p == '-') {
switch (p[1]) {
case 'r':
if (p[2] == ' ')
res = p + 3;
break;
case 'E':
if (p[2] == ' ')
enc = p + 3;
break;
case 's':
if (sscanf((char *)p + 2, " %d", &serial) == 1)
gotSerial = 1;
break;
case 'c':
if (sscanf((char *)p + 2, " %d", &code) != 1)
code = 0;
break;
}
while (*p != 0)
p++;
p++;
}
if (!gotSerial)
continue;
/*
* Give the result information to anyone who's
* waiting for it.
*/
for (pcPtr = client->pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) {
if (serial != pcPtr->serial || pcPtr->result != NULL)
continue;
pcPtr->code = code;
if (res != NULL) {
res = serverConvert(client, enc, res, &tofree);
if (tofree == NULL)
res = strdup(res);
pcPtr->result = res;
}
else
pcPtr->result = strdup((char *)"");
break;
}
} else if (*p == 'n' && p[1] == 0) {
Window win = 0;
unsigned int u;
int gotWindow;
char *str;
VimRemotingClient_ServerReply *r;
char *enc;
/*
* This is a (n)otification. Sent with serverreply_send in VimL.
* Execute any autocommand and save it for later retrieval
*/
p += 2;
gotWindow = 0;
str = (char *)"";
enc = NULL;
while ((p - (char *)propInfo) < numItems && *p == '-') {
switch (p[1]) {
case 'n':
if (p[2] == ' ')
str = p + 3;
break;
case 'E':
if (p[2] == ' ')
enc = p + 3;
break;
case 'w':
if (sscanf((char *)p + 2, " %x", &u) == 1) {
win = u;
gotWindow = 1;
}
break;
}
while (*p != 0)
p++;
p++;
}
if (!gotWindow)
continue;
str = serverConvert(client, enc, str, &tofree);
if ((r = findReply(client, win, SROP_Add)) != NULL) {
ga_concat(&(r->strings), str);
ga_append(&(r->strings), '\0');
}
free(tofree);
} else {
/*
* Didn't recognize this thing. Just skip through the next
* null character and try again.
* Even if we get an 'r'(eply) we will throw it away as we
* never specify (and thus expect) one
*/
while (*p != 0)
p++;
p++;
}
}
XFree(propInfo);
}
/*s
* The window procedure for the hidden message window.
* It handles callback messages and notifications from servers.
* In order to process these messages, it is necessary to run a
* message loop. Code which may run before the main message loop
* is started (in the GUI) is careful to pump messages when it needs
* to. Features which require message delivery during normal use will
* not work in the console version - this basically means those
* features which allow Vim to act as a server, rather than a client.
*/
static LRESULT CALLBACK
Messaging_WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
int err;
if (msg == WM_COPYDATA)
{
/* This is a message from another Vim. The dwData member of the
* COPYDATASTRUCT determines the type of message:
* COPYDATA_ENCODING:
* The encoding that the client uses. Following messages will
* use this encoding, convert if needed.
* COPYDATA_KEYS:
* A key sequence. We are a server, and a client wants these keys
* adding to the input queue.
* COPYDATA_REPLY:
* A reply. We are a client, and a server has sent this message
* in response to a request. (server2client())
* COPYDATA_EXPR:
* An expression. We are a server, and a client wants us to
* evaluate this expression.
* COPYDATA_RESULT:
* A reply. We are a client, and a server has sent this message
* in response to a COPYDATA_EXPR.
* COPYDATA_ERROR_RESULT:
* A reply. We are a client, and a server has sent this message
* in response to a COPYDATA_EXPR that failed to evaluate.
*/
COPYDATASTRUCT *data = (COPYDATASTRUCT*)lParam;
HWND sender = (HWND)wParam;
COPYDATASTRUCT reply;
char_u *res;
int retval;
char_u *str;
char_u *tofree;
switch (data->dwData)
{
case COPYDATA_ENCODING:
/* Remember the encoding that the client uses. */
vim_free(client_enc);
// TODO:
//client_enc = enc_canonize((char_u *)data->lpData);
client_enc = vim_strsave(data->lpData);
return 1;
case COPYDATA_KEYS:
/* not supported */
return 1;
case COPYDATA_EXPR:
str = serverConvert(client_enc, (char_u *)data->lpData, &tofree);
if (usereval == NULL)
{
err = -1;
res = NULL;
}
else
{
res = NULL;
err = usereval((char *)str, (char **)&res);
}
vim_free(tofree);
if (!err)
reply.dwData = COPYDATA_RESULT;
else
reply.dwData = COPYDATA_ERROR_RESULT;
reply.lpData = (res == NULL) ? (char_u *)"" : res;
reply.cbData = (res == NULL) ? 1 : (DWORD)STRLEN(res) + 1;
serverSendEnc(sender);
retval = (int)SendMessage(sender, WM_COPYDATA, (WPARAM)message_window,
(LPARAM)(&reply));
vim_free(res);
return retval;
case COPYDATA_REPLY:
case COPYDATA_RESULT:
case COPYDATA_ERROR_RESULT:
if (data->lpData != NULL)
{
str = serverConvert(client_enc, (char_u *)data->lpData,
&tofree);
if (tofree == NULL)
str = vim_strsave(str);
if (save_reply(sender, str,
(data->dwData == COPYDATA_REPLY ? 0 :
(data->dwData == COPYDATA_RESULT ? 1 :
2))) == FAIL)
vim_free(str);
}
return 1;
}
return 0;
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}