/*
 *  Window Maker window manager
 * 
 *  Copyright (c) 1997-2003 Alfredo K. Kojima
 * 
 *  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.
 */

#include "wconfig.h"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>


/* Xlocale.h and locale.h are the same if X_LOCALE is undefind in wconfig.h,
 * and if X_LOCALE is defined, X's locale emulating functions will be used.
 * See Xlocale.h for more information.
 */
#include <X11/Xlocale.h>

#define MAINFILE

#include "WindowMaker.h"
#include "window.h"
#include "funcs.h"
#include "menu.h"
#include "keybind.h"
#include "xmodifier.h"
#include "defaults.h"
#include "session.h"
#include "dialog.h"

#include <WINGs/WUtil.h>

/****** Global Variables ******/

/* general info */

Display	*dpy;

char *ProgName;

unsigned int ValidModMask = 0xff;

/* locale to use. NULL==POSIX or C */
char *Locale=NULL;

int wScreenCount=0;

WPreferences wPreferences;


WMPropList *wDomainName;
WMPropList *wAttributeDomainName;

WShortKey wKeyBindings[WKBD_LAST];

/* defaults domains */
WDDomain *WDWindowMaker = NULL;
WDDomain *WDWindowAttributes = NULL;
WDDomain *WDRootMenu = NULL;

/* XContexts */
XContext wWinContext;
XContext wAppWinContext;
XContext wStackContext;

/* Atoms */
Atom _XA_WM_STATE;
Atom _XA_WM_CHANGE_STATE;
Atom _XA_WM_PROTOCOLS;
Atom _XA_WM_TAKE_FOCUS;
Atom _XA_WM_DELETE_WINDOW;
Atom _XA_WM_SAVE_YOURSELF;
Atom _XA_WM_CLIENT_LEADER;
Atom _XA_WM_COLORMAP_WINDOWS;
Atom _XA_WM_COLORMAP_NOTIFY;

Atom _XA_GNUSTEP_WM_ATTR;
Atom _XA_GNUSTEP_WM_MINIATURIZE_WINDOW;
Atom _XA_GNUSTEP_WM_RESIZEBAR;
Atom _XA_GNUSTEP_TITLEBAR_STATE;

Atom _XA_WINDOWMAKER_MENU;
Atom _XA_WINDOWMAKER_WM_PROTOCOLS;
Atom _XA_WINDOWMAKER_STATE;

Atom _XA_WINDOWMAKER_WM_FUNCTION;
Atom _XA_WINDOWMAKER_NOTICEBOARD;
Atom _XA_WINDOWMAKER_COMMAND;

Atom _XA_WINDOWMAKER_ICON_SIZE;
Atom _XA_WINDOWMAKER_ICON_TILE;


#ifdef OFFIX_DND
Atom _XA_DND_PROTOCOL;
Atom _XA_DND_SELECTION;
#endif

/* cursors */
Cursor wCursor[WCUR_LAST];

/* last event timestamp for XSetInputFocus */
Time LastTimestamp;
/* timestamp on the last time we did XSetInputFocus() */
Time LastFocusChange;

#ifdef SHAPE
Bool wShapeSupported;
int wShapeEventBase;
#endif

#ifdef KEEP_XKB_LOCK_STATUS
Bool wXkbSupported;
int wXkbEventBase;
#endif

/* special flags */
char WProgramSigState = 0;
char WProgramState = WSTATE_NORMAL;
char WDelayedActionSet = 0;


/* temporary stuff */
int wVisualID = -1;



/* notifications */
const char *WMNManaged = "WMNManaged";
const char *WMNUnmanaged = "WMNUnmanaged";
const char *WMNChangedWorkspace = "WMNChangedWorkspace";
const char *WMNChangedState = "WMNChangedState";
const char *WMNChangedFocus = "WMNChangedFocus";
const char *WMNChangedStacking = "WMNChangedStacking";
const char *WMNChangedName = "WMNChangedName";

const char *WMNWorkspaceCreated = "WMNWorkspaceCreated";
const char *WMNWorkspaceDestroyed = "WMNWorkspaceDestroyed";
const char *WMNWorkspaceChanged = "WMNWorkspaceChanged";
const char *WMNWorkspaceNameChanged = "WMNWorkspaceNameChanged";

const char *WMNResetStacking = "WMNResetStacking";

/******** End Global Variables *****/

static char *DisplayName = NULL;

static char **Arguments;

static int ArgCount;

extern void EventLoop();
extern void StartUp();

static Bool multiHead = True;

/* stdi/o for log shell */
static int LogStdIn = -1, LogStdOut = -1, LogStdErr = -1;


void
Exit(int status)
{
#ifdef XSMP_ENABLED
    wSessionDisconnectManager();
#endif
    if (dpy)
	XCloseDisplay(dpy);

    exit(status);
}


void
Restart(char *manager, Bool abortOnFailure)
{
    char *prog=NULL;
    char *argv[MAX_RESTART_ARGS];
    int i;

    if (manager && manager[0]!=0) {
	prog = argv[0] = strtok(manager, " ");
	for (i=1; i<MAX_RESTART_ARGS; i++) {
	    argv[i]=strtok(NULL, " ");
	    if (argv[i]==NULL) {
		break;
	    }
	}
    }
    if (dpy) {
#ifdef XSMP_ENABLED
	wSessionDisconnectManager();
#endif
	XCloseDisplay(dpy);
	dpy = NULL;
    }
    if (!prog) {
        execvp(Arguments[0], Arguments);
        wfatal(_("failed to restart Window Maker."));
    } else {
        execvp(prog, argv);
        wsyserror(_("could not exec %s"), prog);
    }
    if (abortOnFailure)
        exit(-1);
}



void
SetupEnvironment(WScreen *scr)
{
    char *tmp, *ptr;
    char buf[16];

    if (multiHead) {
	int len = strlen(DisplayName)+64;
    	tmp = wmalloc(len);
    	snprintf(tmp, len, "DISPLAY=%s", XDisplayName(DisplayName));
    	ptr = strchr(strchr(tmp, ':'), '.');
    	if (ptr)
	    *ptr = 0;
    	snprintf(buf, sizeof(buf), ".%i", scr->screen);
    	strcat(tmp, buf);
    	putenv(tmp);
    }
    tmp = wmalloc(60);
    snprintf(tmp, 60, "WRASTER_COLOR_RESOLUTION%i=%i", scr->screen, 
		scr->rcontext->attribs->colors_per_channel);
    putenv(tmp);
}




typedef struct {
    WScreen *scr;
    char *command;
} _tuple;


static void
shellCommandHandler(pid_t pid, unsigned char status, _tuple *data)
{
    if (status == 127) {
	char *buffer;

	buffer = wstrconcat(_("Could not execute command: "), data->command);

	wMessageDialog(data->scr, _("Error"), buffer, _("OK"), NULL, NULL);
	wfree(buffer);
    } else if (status != 127) {
	/*
	printf("%s: %i\n", data->command, status);
	 */
    }

    wfree(data->command);
    wfree(data);
}


void
ExecuteShellCommand(WScreen *scr, char *command)
{
    static char *shell = NULL;
    pid_t pid;

    /*
     * This have a problem: if the shell is tcsh (not sure about others)
     * and ~/.tcshrc have /bin/stty erase ^H somewhere on it, the shell
     * will block and the command will not be executed.
    if (!shell) {
	shell = getenv("SHELL");
	if (!shell)
	    shell = "/bin/sh";
    }
     */
    shell = "/bin/sh";

    pid = fork();
    
    if (pid==0) {

	SetupEnvironment(scr);

#ifdef HAVE_SETSID
        setsid();
#endif
	execl(shell, shell, "-c", command, NULL);
	wsyserror("could not execute %s -c %s", shell, command);
	Exit(-1);
    } else if (pid < 0) {
	wsyserror("cannot fork a new process");
    } else {
	_tuple *data = wmalloc(sizeof(_tuple));
	
	data->scr = scr;
	data->command = wstrdup(command);

	wAddDeathHandler(pid, (WDeathHandler*)shellCommandHandler, data);
    }
}


/*
 *---------------------------------------------------------------------------
 * StartLogShell
 * 	Start a shell that will receive all stdin and stdout from processes
 * forked by wmaker.
 *---------------------------------------------------------------------------
 */
void
StartLogShell(WScreen *scr)
{
    int in_fd[2];
    int out_fd[2];
    int err_fd[2];
    pid_t pid;
    
    SetupEnvironment(scr);
    
    if (pipe(in_fd) < 0) {
	wsyserror("could not create pipe for log shell\n");
	return;
    }
    if (pipe(out_fd) < 0) {
	wsyserror("could not create pipe for log shell\n");
	close(in_fd[0]);
	close(in_fd[1]);
	return;
    }
    if (pipe(err_fd) < 0) {
	wsyserror("could not create pipe for log shell\n");
	close(out_fd[0]);
	close(out_fd[1]);
	close(in_fd[0]);
	close(in_fd[1]);
	return;
    }

    pid = fork();
    if (pid < 0) {
	wsyserror("could not fork a new process for log shell\n");
	return;
    } else if (pid == 0) {	
	close(in_fd[0]);
	close(out_fd[1]);
	close(err_fd[1]);
	
	close(0);
	close(1);
	close(2);

	if (dup2(in_fd[1], 0) < 0) {
	    wsyserror("could not redirect stdin for log shell\n");
	    exit(1);
	}
	if (dup2(out_fd[1], 1) < 0) {
	    wsyserror("could not redirect stdout for log shell\n");
	    exit(1);
	}
	if (dup2(err_fd[1], 2) < 0) {
	    wsyserror("could not redirect stderr for log shell\n");
	    exit(1);
	}

	close(in_fd[1]);
	close(out_fd[1]);
	close(err_fd[1]);

	execl("/bin/sh", "/bin/sh", "-c", wPreferences.logger_shell, NULL);
	wsyserror("could not execute %s\n", wPreferences.logger_shell);
	exit(1);
    } else {
	close(in_fd[1]);
	close(out_fd[0]);
	close(err_fd[0]);
	
	LogStdIn = in_fd[1];
	LogStdOut = out_fd[0];
	LogStdErr = err_fd[0];
    }
}


/*
 *---------------------------------------------------------------------
 * wAbort--
 * 	Do a major cleanup and exit the program
 * 
 *---------------------------------------------------------------------- 
 */
void
wAbort(Bool dumpCore)
{
    int i;
    WScreen *scr;

    for (i=0; i<wScreenCount; i++) {
	scr = wScreenWithNumber(i);
	if (scr)
	    RestoreDesktop(scr);
    }
    printf(_("%s aborted.\n"), ProgName);
    if (dumpCore)
	abort();
    else
	exit(1);
}


void
print_help()
{
    printf(_("Usage: %s [options]\n"), ProgName);
    puts(_("The Window Maker window manager for the X window system"));
    puts("");
    puts(_(" -display host:dpy	display to use"));
#ifdef USECPP
    puts(_(" --no-cpp 		disable preprocessing of configuration files"));
#endif
    puts(_(" --no-dock		do not open the application Dock"));
    puts(_(" --no-clip		do not open the workspace Clip"));
    puts(_(" --no-autolaunch	do not autolaunch applications"));
    puts(_(" --dont-restore		do not restore saved session"));

    puts(_(" --locale locale	locale to use"));

    puts(_(" --create-stdcmap	create the standard colormap hint in PseudoColor visuals"));
    puts(_(" --visual-id visualid	visual id of visual to use"));
    puts(_(" --static		do not update or save configurations"));
    puts(_(" --no-polling		do not periodically check for configuration updates"));
#ifdef DEBUG
    puts(_(" --synchronous		turn on synchronous display mode"));
#endif
    puts(_(" --version		print version and exit"));
    puts(_(" --help			show this message"));
}



void
check_defaults()
{
    char *path;

    path = wdefaultspathfordomain("");
    if (access(path, R_OK)!=0) {
#if 0
	wfatal(_("could not find user GNUstep directory (%s).\n"
		  "Make sure you have installed Window Maker correctly and run wmaker.inst"),
	       path);
	exit(1);
#else
	wwarning(_("could not find user GNUstep directory (%s)."), path);
	
	if (system("wmaker.inst --batch") != 0) {
	    wwarning(_("There was an error while creating GNUstep directory, please "
		       "make sure you have installed Window Maker correctly and run wmaker.inst"));
	} else {
	    wwarning(_("%s directory created with default configuration."), path);
	}
#endif
    }
    
    wfree(path);
}


static void
execInitScript()
{
    char *file;
    char *paths = wstrconcat(wusergnusteppath(), ":"DEF_CONFIG_PATHS);

    file = wfindfile(paths, DEF_INIT_SCRIPT);
    wfree(paths);

    if (file) {
	if (system(file) != 0) {
	    wsyserror(_("%s:could not execute initialization script"), file);
	}
#if 0
	if (fork()==0) {
	    execl("/bin/sh", "/bin/sh", "-c", file, NULL);
	    wsyserror(_("%s:could not execute initialization script"), file);
	    exit(1);
	}
#endif
	wfree(file);
    }
}


void
ExecExitScript()
{
    char *file;
    char *paths = wstrconcat(wusergnusteppath(), ":"DEF_CONFIG_PATHS);

    file = wfindfile(paths, DEF_EXIT_SCRIPT);
    wfree(paths);

    if (file) {
	if (system(file) != 0) {
	    wsyserror(_("%s:could not execute exit script"), file);
	}
#if 0
	if (fork()==0) {
	    execl("/bin/sh", "/bin/sh", "-c", file, NULL);
	    wsyserror(_("%s:could not execute exit script"), file);
	    exit(1);
	}
#endif
	wfree(file);
    }
}

#if 0
char*
getFullPath(char *path)
{
    char buffer[1024];
    char *tmp;
    char *basep = (char*)buffer;

    if (*path != '/' && getcwd(buffer, 1023)) {

	for (;;) {
	    if (strncmp(path, "../", 3)==0) {
		path += 3;
		basep = strchr(basep, '/');
		if (!basep || *path==0)
		    break;
	    }
	}
	if (*path == '/' || strncmp(path, "./",2)==0) {
	    tmp = 
	}

	/*
	 * path
	 * ./path
	 * ../path
	 * ../../path
	 */
	

    } else {
	return wstrconcat(path);
    }

    return tmp;
}
#endif

int
main(int argc, char **argv)
{
    int i, restart=0;
    char *str, *alt;
    int d, s;
#ifdef DEBUG
    Bool doSync = False;
#endif
    setlocale(LC_ALL, "");

    wsetabort(wAbort);

    /* for telling WPrefs what's the name of the wmaker binary being ran */

    str = wstrconcat("WMAKER_BIN_NAME=", argv[0]);
    putenv(str);

    ArgCount = argc;
    Arguments = argv;

    WMInitializeApplication("WindowMaker", &argc, argv);


    ProgName = strrchr(argv[0],'/');
    if (!ProgName)
      ProgName = argv[0];
    else
      ProgName++;


    restart = 0;

    memset(&wPreferences, 0, sizeof(WPreferences));

    wPreferences.fallbackWMs = WMCreateArray(8);
    alt = getenv("WINDOWMAKER_ALT_WM");
    if (alt != NULL)
        WMAddToArray(wPreferences.fallbackWMs, wstrdup(alt));

    WMAddToArray(wPreferences.fallbackWMs, wstrdup(FALLBACK_WINDOWMANAGER));
    WMAddToArray(wPreferences.fallbackWMs, wstrdup("fvwm"));
    WMAddToArray(wPreferences.fallbackWMs, wstrdup("twm"));
    WMAddToArray(wPreferences.fallbackWMs, NULL);
    WMAddToArray(wPreferences.fallbackWMs, wstrdup("rxvt"));
    WMAddToArray(wPreferences.fallbackWMs, wstrdup("xterm"));

    if (argc>1) {
	for (i=1; i<argc; i++) {
#ifdef USECPP
	    if (strcmp(argv[i], "-nocpp")==0
		|| strcmp(argv[i], "--no-cpp")==0) {
		wPreferences.flags.nocpp=1;
	    } else
#endif
	    if (strcmp(argv[i], "-no-autolaunch")==0
		|| strcmp(argv[i], "--no-autolaunch")==0) {
		wPreferences.flags.noautolaunch = 1;
	    } else if (strcmp(argv[i], "-dont-restore")==0
		|| strcmp(argv[i], "--dont-restore")==0) {
		wPreferences.flags.norestore = 1;
	    } else if (strcmp(argv[i], "-nodock")==0
		|| strcmp(argv[i], "--no-dock")==0) {
		wPreferences.flags.nodock=1;
	    } else if (strcmp(argv[i], "-noclip")==0
		       || strcmp(argv[i], "--no-clip")==0) {
		wPreferences.flags.noclip=1;
	    } else if (strcmp(argv[i], "-version")==0
		       || strcmp(argv[i], "--version")==0) {
		printf("Window Maker %s\n", VERSION);
		exit(0);
	    } else if (strcmp(argv[i], "--global_defaults_path")==0) {
		printf("%s/WindowMaker\n", SYSCONFDIR);
		exit(0);
#ifdef DEBUG
            } else if (strcmp(argv[i], "--synchronous")==0) {
                doSync = 1;
#endif
	    } else if (strcmp(argv[i], "-locale")==0
		       || strcmp(argv[i], "--locale")==0) {
		i++;
		if (i>=argc) {
		    wwarning(_("too few arguments for %s"), argv[i-1]);
		    exit(0);
		}
		Locale = argv[i];
	    } else if (strcmp(argv[i], "-display")==0
	    	       || strcmp(argv[i], "--display")==0) {
		i++;
		if (i>=argc) {
		    wwarning(_("too few arguments for %s"), argv[i-1]);
		    exit(0);
		}
		DisplayName = argv[i];
	    } else if (strcmp(argv[i], "-visualid")==0
		       || strcmp(argv[i], "--visual-id")==0) {
		i++;
		if (i>=argc) {
		    wwarning(_("too few arguments for %s"), argv[i-1]);
		    exit(0);
		}
		if (sscanf(argv[i], "%i", &wVisualID)!=1) {
		    wwarning(_("bad value for visualid: \"%s\""), argv[i]);
		    exit(0);
		}
	    } else if (strcmp(argv[i], "-static")==0
		       || strcmp(argv[i], "--static")==0) {

		wPreferences.flags.noupdates = 1;
            } else if (strcmp(argv[i], "-nopolling")==0
                       || strcmp(argv[i], "--no-polling")==0) {

		wPreferences.flags.nopolling = 1;
#ifdef XSMP_ENABLED
	    } else if (strcmp(argv[i], "-clientid")==0
		       || strcmp(argv[i], "-restore")==0) {
		i++;
		if (i>=argc) {
		    wwarning(_("too few arguments for %s"), argv[i-1]);
		    exit(0);
		}
#endif
	    } else if (strcmp(argv[i], "--help")==0) {
		print_help();
		exit(0);
	    } else {
		printf(_("%s: invalid argument '%s'\n"), argv[0], argv[i]);
		printf(_("Try '%s --help' for more information\n"), argv[0]);
		exit(1);
	    }
	}
    }
    
    if (!wPreferences.flags.noupdates) {
	/* check existence of Defaults DB directory */
	check_defaults();
    }


    if (!Locale) {
	Locale = getenv("LC_ALL");
    }
    if (!Locale) {
    	Locale = getenv("LANG");
    }

    setlocale(LC_ALL, "");

    if (!Locale || strcmp(Locale, "C")==0 || strcmp(Locale, "POSIX")==0) 
      Locale = NULL;
#ifdef I18N
    if (getenv("NLSPATH"))
      bindtextdomain("WindowMaker", getenv("NLSPATH"));
    else
      bindtextdomain("WindowMaker", LOCALEDIR);
    textdomain("WindowMaker");

    if (!XSupportsLocale()) {
	wwarning(_("X server does not support locale"));
    }

    if (XSetLocaleModifiers("") == NULL) {
 	wwarning(_("cannot set locale modifiers"));
    }
#endif

    if (Locale) {
	char *ptr;

	Locale = wstrdup(Locale);
	ptr = strchr(Locale, '.');
	if (ptr)
	    *ptr = 0;
    }

    /* open display */
    dpy = XOpenDisplay(DisplayName);
    if (dpy == NULL) {
	wfatal(_("could not open display \"%s\""), XDisplayName(DisplayName));
	exit(1);
    }

    if (fcntl(ConnectionNumber(dpy), F_SETFD, FD_CLOEXEC) < 0) {
	wsyserror("error setting close-on-exec flag for X connection");
	exit(1);
    }

    /* check if the user specified a complete display name (with screen).
     * If so, only manage the specified screen */
    if (DisplayName)
	str = strchr(DisplayName, ':');
    else
	str = NULL;

    if (str && sscanf(str, ":%i.%i", &d, &s)==2)
	multiHead = False;

    DisplayName = XDisplayName(DisplayName);
    {
	int len = strlen(DisplayName)+64;
	str = wmalloc(len);
	snprintf(str, len, "DISPLAY=%s", DisplayName);
    }
    putenv(str);

#ifdef DEBUG
    if (doSync)
        XSynchronize(dpy, True);
#endif

    wXModifierInitialize();

#ifdef XSMP_ENABLED
    wSessionConnectManager(argv, argc);
#endif
    
    StartUp(!multiHead);
    
    if (wScreenCount==1)
	multiHead = False;

    execInitScript();

    EventLoop();
    return -1;
}