/////////////////////////////////////////////////////////////////////////////
// Name:        utils.cpp
// Purpose:
// Author:      Robert Roebling
// Created:     01/02/97
// Id:
// Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////


//#ifdef __GNUG__
//#pragma implementation "utils.h"
//#endif

#include "wx/utils.h"
#include "wx/string.h"
#include "wx/list.h"

#include <ctype.h>
#include <string.h>
#include <unistd.h>
#ifdef __SVR4__
#include <sys/systeminfo.h>
#endif

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


//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

// Yuck this is really BOTH site and platform dependent
// so we should use some other strategy!
#ifdef __SUN__
    #define DEFAULT_XRESOURCE_DIR "/usr/openwin/lib/app-defaults"
#else
    #define DEFAULT_XRESOURCE_DIR "/usr/lib/X11/app-defaults"
#endif

//-----------------------------------------------------------------------------
// glabal data (data.cpp)
//-----------------------------------------------------------------------------

extern wxList wxResourceCache;
extern XrmDatabase wxResourceDatabase;

//-----------------------------------------------------------------------------
// utility functions for get/write resources
//-----------------------------------------------------------------------------

static char *GetResourcePath(char *buf, char *name, bool create)
{
    if (create && FileExists(name)) {
	strcpy(buf, name);
	return buf; // Exists so ...
    }
    if (*name == '/')
	strcpy(buf, name);
    else {
	// Put in standard place for resource files if not absolute
	strcpy(buf, DEFAULT_XRESOURCE_DIR);
	strcat(buf, "/");
	strcat(buf, FileNameFromPath(name));
    }
    if (create) {
	// Touch the file to create it
	FILE *fd = fopen(buf, "w");
	if (fd) fclose(fd);
    }
    return buf;
}

// Read $HOME for what it says is home, if not
// read $USER or $LOGNAME for user name else determine
// the Real User, then determine the Real home dir.
static char *GetIniFile(char *dest, const char *filename)
{
    char *home = NULL;
    if (filename && wxIsAbsolutePath(filename)) 
    {
      strcpy(dest, filename);
    } 
    else
    {
      if ((home = wxGetUserHome(wxString())) != NULL) 
      {
	strcpy(dest, home);
	if (dest[strlen(dest) - 1] != '/') strcat(dest, "/");
	if (filename == NULL) 
	{
	  if ((filename = getenv("XENVIRONMENT")) == NULL) filename = ".Xdefaults";
	} 
	else 
	  if (*filename != '.') strcat(dest, ".");
	strcat(dest, filename);
      }
      else 
      {
        dest[0] = '\0';    
      }
    }
    return dest;
}

static void wxXMergeDatabases(void)
{
    XrmDatabase homeDB, serverDB, applicationDB;
    char filenamebuf[1024];

    char *filename = &filenamebuf[0];
    char *environment;
//    char *classname = gdk_progclass;               // Robert Roebling ??
    printf( "Fixme.\n");
    char name[256];
    (void)strcpy(name, "/usr/lib/X11/app-defaults/");
    (void)strcat(name, classname ? classname : "wxWindows");

    // Get application defaults file, if any 
    if ((applicationDB = XrmGetFileDatabase(name)))
	(void)XrmMergeDatabases(applicationDB, &wxResourceDatabase);

    // Merge server defaults, created by xrdb, loaded as a property of the root
    // window when the server initializes and loaded into the display
    // structure on XOpenDisplay;
    // if not defined, use .Xdefaults
    printf( "Fixme.\n");
/*    if (XResourceManagerString(GDK_DISPLAY()) != NULL) {
	serverDB = XrmGetStringDatabase(XResourceManagerString(GDK_DISPLAY()));
    } else {
	(void)GetIniFile(filename, NULL);
	serverDB = XrmGetFileDatabase(filename);
    }
*/
    if (serverDB)
	XrmMergeDatabases(serverDB, &wxResourceDatabase);

    // Open XENVIRONMENT file, or if not defined, the .Xdefaults,
    // and merge into existing database

    if ((environment = getenv("XENVIRONMENT")) == NULL) {
	size_t len;
	environment = GetIniFile(filename, NULL);
	len = strlen(environment);
#if !defined(SVR4) || defined(__sgi)
	(void)gethostname(environment + len, 1024 - len);
#else
	(void)sysinfo(SI_HOSTNAME, environment + len, 1024 - len);
#endif
    }
    if ((homeDB = XrmGetFileDatabase(environment)))
	XrmMergeDatabases(homeDB, &wxResourceDatabase);
}

//-----------------------------------------------------------------------------
// called on application exit
//-----------------------------------------------------------------------------

void wxFlushResources(void)
{
    char nameBuffer[512];

    wxNode *node = wxResourceCache.First();
    while (node) {
	char *file = node->key.string;
	// If file doesn't exist, create it first.
	(void)GetResourcePath(nameBuffer, file, TRUE);

	XrmDatabase database = (XrmDatabase)node->Data();
	XrmPutFileDatabase(database, nameBuffer);
	XrmDestroyDatabase(database);
	wxNode *next = node->Next();
	delete node;
	node = next;
    }
}

void wxDeleteResources(const char *file)
{
    char buffer[500];
    (void)GetIniFile(buffer, file);

    wxNode *node = wxResourceCache.Find(buffer);
    if (node) {
	XrmDatabase database = (XrmDatabase)node->Data();
	XrmDestroyDatabase(database);
	delete node;
    }
}

//-----------------------------------------------------------------------------
// resource functions
//-----------------------------------------------------------------------------

bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file )
{
    char buffer[500];

    if (!entry) return FALSE;

    (void)GetIniFile(buffer, file);

    XrmDatabase database;
    wxNode *node = wxResourceCache.Find(buffer);
    if (node)
	database = (XrmDatabase)node->Data();
    else {
	database = XrmGetFileDatabase(buffer);
	wxResourceCache.Append(buffer, (wxObject *)database);
    }
    char resName[300];
    strcpy(resName, !section.IsNull() ? WXSTRINGCAST section : "wxWindows");
    strcat(resName, ".");
    strcat(resName, entry);
    XrmPutStringResource(&database, resName, value);
    return TRUE;
};

bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file )
{
    char buf[50];
    sprintf(buf, "%.4f", value);
    return wxWriteResource(section, entry, buf, file);
};

bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file )
{
    char buf[50];
    sprintf(buf, "%ld", value);
    return wxWriteResource(section, entry, buf, file);
};

bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file )
{
    char buf[50];
    sprintf(buf, "%d", value);
    return wxWriteResource(section, entry, buf, file);
};

bool wxGetResource(const wxString& section, const wxString& entry, char **value, const wxString& file )
{
    if (!wxResourceDatabase)
	wxXMergeDatabases();

    XrmDatabase database;
    if (file) {
	char buffer[500];
	// Is this right? Trying to get it to look in the user's
	// home directory instead of current directory -- JACS
	(void)GetIniFile(buffer, file);

	wxNode *node = wxResourceCache.Find(buffer);
	if (node)
	    database = (XrmDatabase)node->Data();
	else {
	    database = XrmGetFileDatabase(buffer);
	    wxResourceCache.Append(buffer, (wxObject *)database);
	}
    } else
	database = wxResourceDatabase;

    XrmValue xvalue;
    char *str_type[20];
    char buf[150];
    strcpy(buf, section);
    strcat(buf, ".");
    strcat(buf, entry);

    bool success = XrmGetResource(database, buf, "*", str_type, &xvalue);
    // Try different combinations of upper/lower case, just in case...
    if (!success) {
	buf[0] = (isupper(buf[0]) ? tolower(buf[0]) : toupper(buf[0]));
	success = XrmGetResource(database, buf, "*", str_type,	&xvalue);
    }
    if (success) {
	if (*value)
	    delete[] *value;
	*value = new char[xvalue.size + 1];
	strncpy(*value, xvalue.addr, (int)xvalue.size);
	return TRUE;
    }
    return FALSE;
};

bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file )
{
    char *s = NULL;
    bool succ = wxGetResource(section, entry, &s, file);
    if (succ) {
	*value = (float)strtod(s, NULL);
	delete[]s;
	return TRUE;
    } else
	return FALSE;
};

bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file )
{
    char *s = NULL;
    bool succ = wxGetResource(section, entry, &s, file);
    if (succ) {
	*value = strtol(s, NULL, 10);
	delete[]s;
	return TRUE;
    } else
	return FALSE;
};

bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file )
{
    char *s = NULL;
    bool succ = wxGetResource(section, entry, &s, file);
    if (succ) {
	// Handle True, False here 
	// True, Yes, Enables, Set or  Activated 
	if (*s == 'T' || *s == 'Y' || *s == 'E' || *s == 'S' || *s == 'A')
	    *value = TRUE;
	// False, No, Disabled, Reset, Cleared, Deactivated
	else if (*s == 'F' || *s == 'N' || *s == 'D' || *s == 'R' || *s == 'C')
	    *value = FALSE;
	// Handle as Integer
	else
	    *value = (int)strtol(s, NULL, 10);
	delete[]s;
	return TRUE;
    } else
	return FALSE;
};

