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eterm/src/e.c

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/*
* Copyright (C) 1997-2009, Michael Jennings
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of the Software, its documentation and marketing & publicity
* materials, and acknowledgment shall be given in the documentation, materials
* and software packages that this Software was used.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
static const char cvs_ident[] = "$Id$";
#include "config.h"
#include "feature.h"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <X11/cursorfont.h>
#include <signal.h>
#include "e.h"
#include "command.h"
#include "startup.h"
#include "options.h"
#include "pixmap.h"
#include "system.h"
Window ipc_win = None, my_ipc_win = None;
static unsigned char timeout = 0;
/* Returns true if running under E, false otherwise */
unsigned char
check_for_enlightenment(void)
{
static signed char have_e = -1;
if (have_e == -1) {
if (props[PROP_ENL_COMMS] != None) {
D_ENL(("Enlightenment detected.\n"));
have_e = 1;
} else {
D_ENL(("Enlightenment not detected.\n"));
have_e = 0;
}
}
return (have_e);
}
Window
enl_ipc_get_win(void)
{
unsigned char *str = NULL;
Atom prop;
unsigned long num, after;
int format;
Window dummy_win;
int dummy_int;
unsigned int dummy_uint;
D_ENL(("Searching for IPC window.\n"));
if ((props[PROP_ENL_COMMS] == None) || (props[PROP_ENL_VERSION] == None)) {
D_ENL((" -> Enlightenment is not running. You lose!\n"));
return None;
}
XGetWindowProperty(Xdisplay, Xroot, props[PROP_ENL_COMMS], 0, 14, False, AnyPropertyType, &prop, &format, &num, &after, &str);
if (str) {
sscanf((char *) str, "%*s %x", (unsigned int *) &ipc_win);
XFree(str);
}
if (ipc_win != None) {
XGetWindowProperty(Xdisplay, Xroot, props[PROP_ENL_VERSION], 0, 14, False, AnyPropertyType,
&prop, &format, &num, &after, &str);
if (str) {
char *ver, *tmp;
tmp = strchr((char *) str, ' ');
if (!tmp) {
tmp = strchr((char *) str, '-');
}
if (tmp) {
ver = tmp + 1;
tmp = strchr((char *) ver, ' ');
if (! tmp) {
tmp = strchr((char *) ver, '-');
}
if (tmp) {
*tmp = 0;
}
/* Make sure the version string is within the acceptable range. */
if (SPIF_CMP_IS_LESS(spiftool_version_compare((spif_charptr_t) str, (spif_charptr_t) "0.16.4"))
|| SPIF_CMP_IS_GREATER(spiftool_version_compare((spif_charptr_t) str, (spif_charptr_t) "0.16.999"))) {
D_ENL((" -> IPC version string \"%s\" out of range. I'll have to ignore it.\n"));
ipc_win = None;
}
}
XFree(str);
}
}
if (ipc_win != None) {
if (!XGetGeometry
(Xdisplay, ipc_win, &dummy_win, &dummy_int, &dummy_int, &dummy_uint, &dummy_uint, &dummy_uint, &dummy_uint)) {
D_ENL((" -> IPC Window property is valid, but the window doesn't exist. I give up!\n"));
ipc_win = None;
}
str = NULL;
if (ipc_win != None) {
XGetWindowProperty(Xdisplay, ipc_win, props[PROP_ENL_COMMS], 0, 14, False, AnyPropertyType, &prop, &format, &num,
&after, &str);
if (str) {
XFree(str);
} else {
D_ENL((" -> IPC Window lacks the proper atom. I can't talk to fake IPC windows....\n"));
ipc_win = None;
}
}
}
if (ipc_win != None) {
D_ENL((" -> IPC Window found and verified as 0x%08x. Registering Eterm as an IPC client.\n", (int) ipc_win));
XSelectInput(Xdisplay, ipc_win, StructureNotifyMask | SubstructureNotifyMask);
enl_ipc_send("set clientname " APL_NAME);
enl_ipc_send("set version " VERSION);
enl_ipc_send("set email mej@eterm.org");
enl_ipc_send("set web http://www.eterm.org/");
enl_ipc_send("set info Eterm Enlightened Terminal Emulator");
}
if (my_ipc_win == None) {
my_ipc_win = XCreateSimpleWindow(Xdisplay, Xroot, -2, -2, 1, 1, 0, 0, 0);
}
return (ipc_win);
}
void
enl_ipc_send(char *str)
{
static char *last_msg = NULL;
char buff[21];
register unsigned short i;
register unsigned char j;
unsigned short len;
XEvent ev;
if (str == NULL) {
ASSERT(last_msg != NULL);
str = last_msg;
D_ENL(("Resending last message \"%s\" to Enlightenment.\n", str));
} else {
if (last_msg != NULL) {
FREE(last_msg);
}
last_msg = STRDUP(str);
D_ENL(("Sending \"%s\" to Enlightenment.\n", str));
}
if (ipc_win == None) {
if ((ipc_win = enl_ipc_get_win()) == None) {
D_ENL(("...or perhaps not, since Enlightenment doesn't seem to be running. No IPC window, no IPC. Sorry....\n"));
return;
}
}
len = strlen(str);
for (; XCheckTypedWindowEvent(Xdisplay, my_ipc_win, ClientMessage, &ev);); /* Discard any out-of-sync messages */
ev.xclient.type = ClientMessage;
ev.xclient.serial = 0;
ev.xclient.send_event = True;
ev.xclient.window = ipc_win;
ev.xclient.message_type = props[PROP_ENL_MSG];
ev.xclient.format = 8;
for (i = 0; i < len + 1; i += 12) {
sprintf(buff, "%8x", (int) my_ipc_win);
for (j = 0; j < 12; j++) {
buff[8 + j] = str[i + j];
if (!str[i + j]) {
break;
}
}
buff[20] = 0;
for (j = 0; j < 20; j++) {
ev.xclient.data.b[j] = buff[j];
}
XSendEvent(Xdisplay, ipc_win, False, 0, (XEvent *) & ev);
}
D_ENL(("Message sent to IPC window 0x%08x.\n", ipc_win));
}
static RETSIGTYPE
enl_ipc_timeout(int sig)
{
timeout = 1;
SIG_RETURN(sig);
sig = 0;
}
char *
enl_wait_for_reply(void)
{
XEvent ev;
static char msg_buffer[20];
register unsigned char i;
alarm(3);
for (; !XCheckTypedWindowEvent(Xdisplay, my_ipc_win, ClientMessage, &ev) && !timeout;);
alarm(0);
if (ev.xany.type != ClientMessage) {
return (IPC_TIMEOUT);
}
for (i = 0; i < 20; i++) {
msg_buffer[i] = ev.xclient.data.b[i];
}
return (msg_buffer + 8);
}
char *
enl_ipc_get(const char *msg_data)
{
static char *message = NULL;
static unsigned short len = 0;
char buff[13], *ret_msg = NULL;
register unsigned char i;
unsigned char blen;
if (msg_data == IPC_TIMEOUT) {
return (IPC_TIMEOUT);
}
for (i = 0; i < 12; i++) {
buff[i] = msg_data[i];
}
buff[12] = 0;
blen = strlen(buff);
if (message != NULL) {
len += blen;
message = (char *) REALLOC(message, len + 1);
strcat(message, buff);
} else {
len = blen;
message = (char *) MALLOC(len + 1);
strcpy(message, buff);
}
if (blen < 12) {
ret_msg = message;
message = NULL;
D_ENL(("Received complete reply: \"%s\"\n", ret_msg));
}
return (ret_msg);
}
char *
enl_send_and_wait(char *msg)
{
char *reply = IPC_TIMEOUT;
eterm_sighandler_t old_alrm;
if (ipc_win == None) {
/* The IPC window is missing. Wait for it to return or Eterm to be killed. */
for (; enl_ipc_get_win() == None;) {
sleep(1);
}
}
old_alrm = (eterm_sighandler_t) signal(SIGALRM, (eterm_sighandler_t) enl_ipc_timeout);
for (; reply == IPC_TIMEOUT;) {
timeout = 0;
enl_ipc_send(msg);
for (; !(reply = enl_ipc_get(enl_wait_for_reply())););
if (reply == IPC_TIMEOUT) {
/* We timed out. The IPC window must be AWOL. Reset and resend message. */
D_ENL(("IPC timed out. IPC window 0x%08x has gone AWOL. Clearing ipc_win.\n", ipc_win));
XSelectInput(Xdisplay, ipc_win, None);
ipc_win = None;
(void) check_image_ipc(1);
}
}
signal(SIGALRM, old_alrm);
return (reply);
}
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