//
// "$Id: demo.cxx 12655 2018-02-09 14:39:42Z AlbrechtS $"
//
// Main demo program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2018 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

// *FIXME*
// Implement fl_putenv(). Then remove the following comment
// and the #define's of fl_putenv below

// Visual C++ 2005 incorrectly displays a warning about the use of
// POSIX APIs on Windows, which is supposed to be POSIX compliant...

#if defined(_MSC_VER)
#  define fl_putenv _putenv
#else
#  define fl_putenv putenv
#endif // _MSC_VER

// *FIXME* To do:
// Check whether '#include <unistd.h>' can be removed since chdir()
// has been replaced with fl_chdir() (AlbrechtS, Nov 12, 2017)

#if defined __APPLE__
#include <ApplicationServices/ApplicationServices.h>
#include <unistd.h> // no longer necessary with fl_chdir() ?
#endif

#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Choice.H>
#include <FL/filename.H>
#include <FL/platform.H>

/* Define a macro to decide if a trailing 'd' needs to be removed
   from the executable file name. Previous versions of Visual Studio
   added a 'd' to the executable file name ('demod.exe') in Debug
   configurations that needed to be removed.
   This is no longer true with CMake-generated IDE's since FLTK 1.4.
   The 'old' behavior obviously applied or still applies to
   CodeWarrior (__MWERKS__).
   *FIXME* is this still true and necessary?
*/

// #if ( defined _MSC_VER || defined __MWERKS__ ) && defined _DEBUG

#if defined(_WIN32) && defined(__MWERKS__) && defined(_DEBUG)
# define DEBUG_EXE_WITH_D 1
#else
# define DEBUG_EXE_WITH_D 0
#endif

/* The form description */

void doexit(Fl_Widget *, void *);
void doback(Fl_Widget *, void *);
void dobut(Fl_Widget *, long);
void doscheme(Fl_Choice *c, void *) {
  Fl::scheme(c->text(c->value()));
}

Fl_Double_Window *form;
Fl_Button *but[9];

void create_the_forms() {
  Fl_Widget *obj;
  form = new Fl_Double_Window(350, 440);
  obj = new Fl_Box(FL_FRAME_BOX,10,15,330,40,"FLTK Demonstration");
  obj->color(FL_GRAY-4);
  obj->labelsize(24);
  obj->labelfont(FL_BOLD);
  obj->labeltype(FL_ENGRAVED_LABEL);
  obj = new Fl_Box(FL_FRAME_BOX,10,65,330,330,0);
  obj->color(FL_GRAY-8);
  obj = new Fl_Button(280,405,60,25,"Exit");
  obj->callback(doexit);
  Fl_Choice *choice = new Fl_Choice(75, 405, 100, 25, "Scheme:");
  choice->labelfont(FL_HELVETICA_BOLD);
  choice->add("none");
  choice->add("gtk+");
  choice->add("gleam");
  choice->add("plastic");
  choice->callback((Fl_Callback *)doscheme);
  Fl::scheme(NULL);
  if (!Fl::scheme()) choice->value(0);
  else if (!strcmp(Fl::scheme(), "gtk+")) choice->value(1);
  else if (!strcmp(Fl::scheme(), "gleam")) choice->value(2);
  else if (!strcmp(Fl::scheme(), "plastic")) choice->value(3);
  else choice->value(0);
  obj = new Fl_Button(10,15,330,380); obj->type(FL_HIDDEN_BUTTON);
  obj->callback(doback);
  obj = but[0] = new Fl_Button( 30, 85,90,90);
  obj = but[1] = new Fl_Button(130, 85,90,90);
  obj = but[2] = new Fl_Button(230, 85,90,90);
  obj = but[3] = new Fl_Button( 30,185,90,90);
  obj = but[4] = new Fl_Button(130,185,90,90);
  obj = but[5] = new Fl_Button(230,185,90,90);
  obj = but[6] = new Fl_Button( 30,285,90,90);
  obj = but[7] = new Fl_Button(130,285,90,90);
  obj = but[8] = new Fl_Button(230,285,90,90);
  for (int i=0; i<9; i++) {
    but[i]->align(FL_ALIGN_WRAP);
    but[i]->callback(dobut, i);
  }
  form->end();
}

/* Maintaining and building up the menus. */

typedef struct {
  char name[64];
  int numb;
  char iname[9][64];
  char icommand[9][64];
} MENU;

#define MAXMENU	32

MENU menus[MAXMENU];
int mennumb = 0;

/* Return the number of a given menu name. */
int find_menu(const char* nnn) {
  int i;
  for (i=0; i<mennumb; i++)
    if (strcmp(menus[i].name,nnn) == 0) return i;
  return -1;
}

/* Create a new menu with name nnn */
void create_menu(const char* nnn) {
  if (mennumb == MAXMENU -1) return;
  strcpy(menus[mennumb].name,nnn);
  menus[mennumb].numb = 0;
  mennumb++;
}

/* Add an item to a menu */
void addto_menu(const char* men, const char* item, const char* comm) {
  int n = find_menu(men);
  if (n<0) { create_menu(men); n = find_menu(men); }
  if (menus[n].numb == 9) return;
  strcpy(menus[n].iname[menus[n].numb],item);
  strcpy(menus[n].icommand[menus[n].numb],comm);
  menus[n].numb++;
}

/* Button to Item conversion and back. */

int b2n[][9] = { 
	{ -1, -1, -1, -1,  0, -1, -1, -1, -1},
	{ -1, -1, -1,  0, -1,  1, -1, -1, -1},
	{  0, -1, -1, -1,  1, -1, -1, -1,  2},
	{  0, -1,  1, -1, -1, -1,  2, -1,  3},
	{  0, -1,  1, -1,  2, -1,  3, -1,  4},
	{  0, -1,  1,  2, -1,  3,  4, -1,  5},
	{  0, -1,  1,  2,  3,  4,  5, -1,  6},
	{  0,  1,  2,  3, -1,  4,  5,  6,  7},
	{  0,  1,  2,  3,  4,  5,  6,  7,  8}
};
int n2b[][9] = { 
	{  4, -1, -1, -1, -1, -1, -1, -1, -1},
	{  3,  5, -1, -1, -1, -1, -1, -1, -1},
	{  0,  4,  8, -1, -1, -1, -1, -1, -1},
	{  0,  2,  6,  8, -1, -1, -1, -1, -1},
	{  0,  2,  4,  6,  8, -1, -1, -1, -1},
	{  0,  2,  3,  5,  6,  8, -1, -1, -1},
	{  0,  2,  3,  4,  5,  6,  8, -1, -1},
	{  0,  1,  2,  3,  5,  6,  7,  8, -1},
	{  0,  1,  2,  3,  4,  5,  6,  7,  8}
};

/* Transform a button number to an item number when there are
  maxnumb items in total. -1 if the button should not exist. */
int but2numb(int bnumb, int maxnumb)
{ return b2n[maxnumb][bnumb]; }

/* Transform an item number to a button number when there are
  maxnumb items in total. -1 if the item should not exist. */
int numb2but(int inumb, int maxnumb)
{ return n2b[maxnumb][inumb]; }

/* Pushing and Popping menus */

char stack[64][32];
int stsize = 0;

/* Push a menu to be visible */
void push_menu(const char* nnn) {
  int n,i,bn;
  int men = find_menu(nnn);
  if (men < 0) return;
  n = menus[men].numb;
  for (i=0; i<9; i++) but[i]->hide();
  for (i=0; i<n; i++)
  {
    bn = numb2but(i,n-1);
    but[bn]->show();
    but[bn]->label(menus[men].iname[i]);
    if (menus[men].icommand[i][0] != '@') but[bn]->tooltip(menus[men].icommand[i]);
    else but[bn]->tooltip(0);
  }
  if (stack[stsize]!=nnn)
    strcpy(stack[stsize],nnn);
  stsize++;
}

/* Pop a menu */
void pop_menu() {
  if (stsize<=1) return;
  stsize -= 2;
  push_menu(stack[stsize]);
}

/* The callback Routines */

/* Handle a button push */
void dobut(Fl_Widget *, long arg) {
  int men = find_menu(stack[stsize-1]);
  int n = menus[men].numb;
  int bn = but2numb( (int) arg, n-1);
  if (menus[men].icommand[bn][0] == '@') {
    push_menu(menus[men].icommand[bn]);
  } else {

#ifdef _WIN32

    STARTUPINFO		suInfo;		// Process startup information
    PROCESS_INFORMATION	prInfo;		// Process information

# if DEBUG_EXE_WITH_D
    const char *exe = "d.exe";		// exe name with trailing 'd'
# else
    const char *exe = ".exe";		// exe name w/o trailing 'd'
# endif

    memset(&suInfo, 0, sizeof(suInfo));
    suInfo.cb = sizeof(suInfo);
    
    int icommand_length = strlen(menus[men].icommand[bn]);
    
    char* copy_of_icommand = new char[icommand_length+1];
    strcpy(copy_of_icommand,menus[men].icommand[bn]);
    
    // On Windows the .exe suffix needs to be appended to the command
    // whilst leaving any additional parameters unchanged - this
    // is required to handle the correct conversion of cases such as : 
    // `../fluid/fluid valuators.fl' to '../fluid/fluid.exe valuators.fl'.

    // skip leading spaces.
    char* start_command = copy_of_icommand;
    while (*start_command == ' ') ++start_command;

    // find the space between the command and parameters if one exists.
    char* start_parameters = strchr(start_command,' ');

    char* command = new char[icommand_length+6]; // 6 for extra 'd.exe\0'

    if (start_parameters==NULL) { // no parameters required.
      sprintf(command, "%s%s", start_command, exe);
    } else { // parameters required.
      // break the start_command at the intermediate space between
      // start_command and start_parameters.
      *start_parameters = 0;
      // move start_paremeters to skip over the intermediate space.
      ++start_parameters;
      
      sprintf(command, "%s%s %s", start_command, exe, start_parameters);
    }
    
    CreateProcess(NULL, command, NULL, NULL, FALSE,
                  NORMAL_PRIORITY_CLASS, NULL, NULL, &suInfo, &prInfo);
    
    delete[] command;
    delete[] copy_of_icommand;
    
#elif defined __APPLE__

    char *cmd = strdup(menus[men].icommand[bn]);
    char *arg = strchr(cmd, ' ');
    
    char command[2048], path[2048], app_path[2048];
    
    // this neat little block of code ensures that the current directory
    // is set to the location of the Demo application.
    CFBundleRef app = CFBundleGetMainBundle();
    CFURLRef url = CFBundleCopyBundleURL(app);    
    CFStringRef cc_app_path = CFURLCopyFileSystemPath(url, kCFURLPOSIXPathStyle);
    CFRelease(url);
    CFStringGetCString(cc_app_path, app_path, 2048, kCFStringEncodingUTF8);
    CFRelease(cc_app_path);
    if (*app_path) {
      if (memcmp(app_path + strlen(app_path) - 4, ".app", 4) == 0) {
        char *n = strrchr(app_path, '/');
        if (n) *n = 0;
      }
      fl_chdir(app_path);
    }
    
    char *name = new char[strlen(cmd) + 5];
    strcpy(name, cmd);
    if (arg) name[arg-cmd] = 0;
    strcat(name, ".app");
    // check whether app bundle exists
    if ( ! fl_filename_isdir(name) ) strcpy(name, cmd);
    if (arg) {
      const char *fluidpath;
      *arg = 0;
#if defined USING_XCODE
      fl_filename_absolute(path, 2048, "../../../../test/");
      fluidpath = "Fluid.app";
#else
      strcpy(path, app_path); strcat(path, "/");
      fluidpath = "../fluid/fluid.app";
      // check whether fluid bundle exists
      if ( ! fl_filename_isdir(fluidpath) ) fluidpath = "../fluid";
#endif
      if (strcmp(cmd, "../fluid/fluid")==0) {
	sprintf(command, "open %s --args %s%s", fluidpath, path, arg+1);
      } else {
	sprintf(command, "open %s --args %s%s", name, path, arg+1);
      }
    } else {
      sprintf(command, "open %s", name);
    }
    delete[] name;
    // puts(command);
    system(command);
    free(cmd);

#else // Non Windows systems.

    int icommand_length = strlen(menus[men].icommand[bn]);
    char* command = new char[icommand_length+5]; // 5 for extra './' and ' &\0' 

    sprintf(command, "./%s &", menus[men].icommand[bn]);
    if (system(command)==-1) { /* ignore */ }

    delete[] command;

#endif // _WIN32
  }
}

void doback(Fl_Widget *, void *) {pop_menu();}

void doexit(Fl_Widget *, void *) {exit(0);}

/* Load the menu file. Returns whether successful. */
int load_the_menu(char* fname) {
  FILE *fin = 0;
  char line[256], mname[64],iname[64],cname[64];
  int i, j;
  fin = fl_fopen(fname,"r");
#if defined ( __APPLE__ )
  if (fin == NULL) {
    // mac os bundle menu detection:
    char* pos = strrchr(fname,'/');
    if (!pos) return 0;
    *pos = '\0';
    pos = strrchr(fname,'/');
    if (!pos) return 0;
    strcpy(pos,"/Resources/demo.menu");
    fin  = fl_fopen(fname,"r");
  }
#endif
  if (fin == NULL) {
    return 0;
  }
  for (;;) {
    if (fgets(line,256,fin) == NULL) break;
    // remove all carriage returns that Cygwin may have inserted
    char *s = line, *d = line;
    for (;;++d) {
      while (*s=='\r') s++;
      *d = *s++;
      if (!*d) break;
    }
    // interpret the line
    j = 0; i = 0;
    while (line[i] == ' ' || line[i] == '\t') i++;
    if (line[i] == '\n') continue;
    if (line[i] == '#') continue;
    while (line[i] != ':' && line[i] != '\n') mname[j++] = line[i++];
    mname[j] = '\0';
    if (line[i] == ':') i++;
    j = 0; 
    while (line[i] != ':' && line[i] != '\n') {
      if (line[i] == '\\') {
        i++;
        if (line[i] == 'n') iname[j++] = '\n';
        else iname[j++] = line[i];
        i++;
      } else
        iname[j++] = line[i++];
    }
    iname[j] = '\0';
    if (line[i] == ':') i++;
    j = 0;
    while (line[i] != ':' && line[i] != '\n') cname[j++] = line[i++];
    cname[j] = '\0';
    addto_menu(mname,iname,cname);
  }
  fclose(fin);
  return 1;
}

int main(int argc, char **argv) {
  fl_putenv((char *)"FLTK_DOCDIR=../documentation/html");
  char buf[FL_PATH_MAX];
  strcpy(buf, argv[0]);
#if DEBUG_EXE_WITH_D
  // MS_VisualC appends a 'd' to debugging executables. Remove it.
  fl_filename_setext( buf, "" );
  buf[ strlen(buf)-1 ] = 0;
#endif
  fl_filename_setext(buf,".menu");
  char *fname = buf;
  int i = 0;
  if (!Fl::args(argc,argv,i) || i < argc-1)
    Fl::fatal("Usage: %s <switches> <menufile>\n%s",argv[0],Fl::help);
  if (i < argc) fname = argv[i];
  
  create_the_forms();
  
  if (!load_the_menu(fname)) Fl::fatal("Can't open %s",fname);
  if (buf != fname)
    strcpy(buf,fname);
  const char *c = fl_filename_name(buf);
  if (c > buf) {
    buf[c-buf] = 0; 
    if (fl_chdir(buf) == -1) { /* ignore */ }
  }
  push_menu("@main");
  form->show(argc,argv);
  Fl::run();
  return 0;
}

//
// End of "$Id: demo.cxx 12655 2018-02-09 14:39:42Z AlbrechtS $".
//
