LookingGlass/client/displayservers/X11/wm/i3.c

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/**
* Looking Glass
* Copyright © 2017-2023 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_X11DS_WM_DEFAULT_
#define _H_X11DS_WM_DEFAULT_
#include "wm.h"
#include "x11.h"
#include "atoms.h"
#include "common/debug.h"
#include "common/option.h"
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#include "common/util.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
static struct Option options[] =
{
// app options
{
.module = "i3",
.name = "globalFullScreen",
.description = "Use i3's global full screen feature (spans all monitors)",
.type = OPTION_TYPE_BOOL,
.value.x_bool = false,
},
{0}
};
struct i3state
{
int sock;
bool globalFullScreen;
};
static struct i3state i3;
static void wm_i3_setup(void)
{
option_register(options);
}
static bool wm_i3_init(void)
{
memset(&i3, 0, sizeof(i3));
i3.globalFullScreen = option_get_bool("i3", "globalFullScreen");
FILE * fd = popen("i3 --get-socketpath", "r");
if (!fd)
return false;
struct sockaddr_un addr = { .sun_family = AF_UNIX };
char path[sizeof(addr.sun_path)];
int pathLen;
if ((pathLen = fread(path, 1, sizeof(path), fd)) <= 0)
{
pclose(fd);
return false;
}
pclose(fd);
if(path[pathLen-1] == '\n')
--pathLen;
path[pathLen] = '\0';
i3.sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (i3.sock < 0)
{
DEBUG_ERROR("Failed to create socket for i3 IPC");
return false;
}
strncpy(addr.sun_path, path, sizeof(addr.sun_path));
if (connect(i3.sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
{
DEBUG_ERROR("Failed to connect to the i3 IPC socket");
perror("connect");
goto err_socket;
}
DEBUG_INFO("i3 IPC Connected");
return true;
err_socket:
close(i3.sock);
return false;
}
static void wm_i3_deinit(void)
{
close(i3.sock);
}
static void wm_i3_setFullscreen(bool enable)
{
if (!i3.globalFullScreen)
{
X11WM_Default.setFullscreen(enable);
return;
}
struct i3Msg
{
char magic[6];
uint32_t length;
uint32_t type;
char payload[0];
}
__attribute__((packed));
#define I3_IPC_TYPE_RUN_COMMAND 0
char cmd[128];
int cmdLen = snprintf(cmd, sizeof(cmd),
"[id=%lu] fullscreen toggle global",
x11.window);
struct i3Msg *msg = alloca(sizeof(struct i3Msg) + cmdLen);
memcpy(msg->magic, "i3-ipc", 6);
msg->length = cmdLen;
msg->type = I3_IPC_TYPE_RUN_COMMAND;
memcpy(msg->payload, cmd, cmdLen);
int msgSize = sizeof(*msg) + msg->length;
char * buf = (char *)msg;
while(msgSize)
{
int wrote = write(i3.sock, buf, msgSize);
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if (wrote <= 0)
{
DEBUG_WARN("i3 IPC communication failure");
return;
}
buf += wrote;
msgSize -= wrote;
}
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if ((msgSize = read(i3.sock, msg, sizeof(*msg))) < 0)
{
DEBUG_WARN("i3 IPC read failure");
return;
}
if (memcmp(msg->magic, "i3-ipc", 6) != 0 ||
msg->type != I3_IPC_TYPE_RUN_COMMAND)
{
DEBUG_WARN("i3 IPC unexpected reply");
return;
}
// read and discard the payload
while(msg->length)
{
int len = read(i3.sock, cmd, min(msg->length, sizeof(cmd)));
if (len <= 0)
{
DEBUG_WARN("i3 IPC failed to read payload");
return;
}
msg->length -= len;
}
};
X11WM X11WM_i3 =
{
.setup = wm_i3_setup,
.init = wm_i3_init,
.deinit = wm_i3_deinit,
.setFullscreen = wm_i3_setFullscreen
};
#endif