Fl_arg.cxx

Go to the documentation of this file.

//
// "$Id: Fl_arg.cxx 7903 2010-11-28 21:06:39Z matt $"
//
// Optional argument initialization code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// OPTIONAL initialization code for a program using fltk.
// You do not need to call this!  Feel free to make up your own switches.

#include <FL/Fl.H>
#include <FL/x.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Tooltip.H>
#include <FL/filename.H>
#include <FL/fl_draw.H>
#include <ctype.h>
#include "flstring.h"

#if defined(WIN32) || defined(__APPLE__)
int XParseGeometry(const char*, int*, int*, unsigned int*, unsigned int*);
#  define NoValue       0x0000
#  define XValue        0x0001
#  define YValue        0x0002
#  define WidthValue    0x0004
#  define HeightValue   0x0008
#  define AllValues     0x000F
#  define XNegative     0x0010
#  define YNegative     0x0020
#endif

static int fl_match(const char *a, const char *s, int atleast = 1) {
  const char *b = s;
  while (*a && (*a == *b || tolower(*a) == *b)) {a++; b++;}
  return !*a && b >= s+atleast;
}

// flags set by previously parsed arguments:
extern char fl_show_iconic; // in Fl_x.cxx
static char arg_called;
static char return_i;
static const char *name;
static const char *geometry;
static const char *title;
// these are in Fl_get_system_colors and are set by the switches:
extern const char *fl_fg;
extern const char *fl_bg;
extern const char *fl_bg2;

int Fl::arg(int argc, char **argv, int &i) {
  arg_called = 1;
  const char *s = argv[i];

  if (!s) {i++; return 1;}      // something removed by calling program?

  // a word that does not start with '-', or a word after a '--', or
  // the word '-' by itself all start the "non-switch arguments" to
  // a program.  Return 0 to indicate that we don't understand the
  // word, but set a flag (return_i) so that args() will return at
  // that point:
  if (s[0] != '-' || s[1] == '-' || !s[1]) {return_i = 1; return 0;}
  s++; // point after the dash

  if (fl_match(s, "iconic")) {
    fl_show_iconic = 1;
    i++;
    return 1;
  } else if (fl_match(s, "kbd")) {
    Fl::visible_focus(1);
    i++;
    return 1;
  } else if (fl_match(s, "nokbd", 3)) {
    Fl::visible_focus(0);
    i++;
    return 1;
  } else if (fl_match(s, "dnd", 2)) {
    Fl::dnd_text_ops(1);
    i++;
    return 1;
  } else if (fl_match(s, "nodnd", 3)) {
    Fl::dnd_text_ops(0);
    i++;
    return 1;
  } else if (fl_match(s, "tooltips", 2)) {
    Fl_Tooltip::enable();
    i++;
    return 1;
  } else if (fl_match(s, "notooltips", 3)) {
    Fl_Tooltip::disable();
    i++;
    return 1;
  }
#ifdef __APPLE__
  // The Finder application in MacOS X passes the "-psn_N_NNNNN" option
  // to all apps...
  else if (strncmp(s, "psn_", 4) == 0) {
    i++;
    return 1;
  }
#endif // __APPLE__

  const char *v = argv[i+1];
  if (i >= argc-1 || !v)
    return 0;   // all the rest need an argument, so if missing it is an error

  if (fl_match(s, "geometry")) {

    int flags, gx, gy; unsigned int gw, gh;
    flags = XParseGeometry(v, &gx, &gy, &gw, &gh);
    if (!flags) return 0;
    geometry = v;

#if !defined(WIN32) && !defined(__APPLE__)
  } else if (fl_match(s, "display", 2)) {
    Fl::display(v);
#endif

  } else if (fl_match(s, "title", 2)) {
    title = v;

  } else if (fl_match(s, "name", 2)) {
    name = v;

  } else if (fl_match(s, "bg2", 3) || fl_match(s, "background2", 11)) {
    fl_bg2 = v;

  } else if (fl_match(s, "bg", 2) || fl_match(s, "background", 10)) {
    fl_bg = v;

  } else if (fl_match(s, "fg", 2) || fl_match(s, "foreground", 10)) {
    fl_fg = v;

  } else if (fl_match(s, "scheme", 1)) {
    Fl::scheme(v);

  } else return 0; // unrecognized

  i += 2;
  return 2;
}


int Fl::args(int argc, char** argv, int& i, Fl_Args_Handler cb) {
  arg_called = 1;
  i = 1; // skip argv[0]
  while (i < argc) {
    if (cb && cb(argc,argv,i)) continue;
    if (!arg(argc,argv,i)) return return_i ? i : 0;
  }
  return i;
}

// show a main window, use any parsed arguments
void Fl_Window::show(int argc, char **argv) {
  if (argc && !arg_called) Fl::args(argc,argv);

  Fl::get_system_colors();

#if !defined(WIN32) && !defined(__APPLE__)
  // Get defaults for drag-n-drop and focus...
  const char *key = 0, *val;

  if (Fl::first_window()) key = Fl::first_window()->xclass();
  if (!key) key = "fltk";

  val = XGetDefault(fl_display, key, "dndTextOps");
  if (val) Fl::dnd_text_ops(strcasecmp(val, "true") == 0 ||
                            strcasecmp(val, "on") == 0 ||
                            strcasecmp(val, "yes") == 0);

  val = XGetDefault(fl_display, key, "tooltips");
  if (val) Fl_Tooltip::enable(strcasecmp(val, "true") == 0 ||
                              strcasecmp(val, "on") == 0 ||
                              strcasecmp(val, "yes") == 0);

  val = XGetDefault(fl_display, key, "visibleFocus");
  if (val) Fl::visible_focus(strcasecmp(val, "true") == 0 ||
                             strcasecmp(val, "on") == 0 ||
                             strcasecmp(val, "yes") == 0);
#endif // !WIN32 && !__APPLE__

  // set colors first, so background_pixel is correct:
  static char beenhere;
  if (!beenhere) {
    if (geometry) {
      int fl = 0, gx = x(), gy = y(); unsigned int gw = w(), gh = h();
      fl = XParseGeometry(geometry, &gx, &gy, &gw, &gh);
      if (fl & XNegative) gx = Fl::w()-w()+gx;
      if (fl & YNegative) gy = Fl::h()-h()+gy;
      //  int mw,mh; minsize(mw,mh);
      //  if (mw > gw) gw = mw;
      //  if (mh > gh) gh = mh;
      Fl_Widget *r = resizable();
      if (!r) resizable(this);
      // for WIN32 we assume window is not mapped yet:
      if (fl & (XValue | YValue))
        x(-1), resize(gx,gy,gw,gh);
      else
        size(gw,gh);
      resizable(r);
    }
  }

  // set the class, which is used by X version of get_system_colors:
  if (name) {xclass(name); name = 0;}
  else if (!xclass()) xclass(fl_filename_name(argv[0]));

  if (title) {label(title); title = 0;}
  else if (!label()) label(xclass());

  if (!beenhere) {
    beenhere = 1;
    Fl::scheme(Fl::scheme()); // opens display!  May call Fl::fatal()
  }

  // Show the window AFTER we have set the colors and scheme.
  show();

#if !defined(WIN32) && !defined(__APPLE__)
  // set the command string, used by state-saving window managers:
  int j;
  int n=0; for (j=0; j<argc; j++) n += strlen(argv[j])+1;
  char *buffer = new char[n];
  char *p = buffer;
  for (j=0; j<argc; j++) for (const char *q = argv[j]; (*p++ = *q++););
  XChangeProperty(fl_display, fl_xid(this), XA_WM_COMMAND, XA_STRING, 8, 0,
                  (unsigned char *)buffer, p-buffer-1);
  delete[] buffer;
#endif // !WIN32 && !__APPLE__
}

// Calls useful for simple demo programs, with automatic help message:

static const char * const helpmsg =
"options are:\n"
" -bg2 color\n"
" -bg color\n"
" -di[splay] host:n.n\n"
" -dn[d]\n"
" -fg color\n"
" -g[eometry] WxH+X+Y\n"
" -i[conic]\n"
" -k[bd]\n"
" -na[me] classname\n"
" -nod[nd]\n"
" -nok[bd]\n"
" -not[ooltips]\n"
" -s[cheme] scheme\n"
" -ti[tle] windowtitle\n"
" -to[oltips]";

const char * const Fl::help = helpmsg+13;

void Fl::args(int argc, char **argv) {
  int i; if (Fl::args(argc,argv,i) < argc) Fl::error(helpmsg);
}

#if defined(WIN32) || defined(__APPLE__)

/* the following function was stolen from the X sources as indicated. */

/* Copyright    Massachusetts Institute of Technology  1985, 1986, 1987 */
/* $XConsortium: XParseGeom.c,v 11.18 91/02/21 17:23:05 rws Exp $ */

/*
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation, and that the name of M.I.T. not be used in advertising or
publicity pertaining to distribution of the software without specific,
written prior permission.  M.I.T. makes no representations about the
suitability of this software for any purpose.  It is provided "as is"
without express or implied warranty.
*/

/*
 *    XParseGeometry parses strings of the form
 *   "=<width>x<height>{+-}<xoffset>{+-}<yoffset>", where
 *   width, height, xoffset, and yoffset are unsigned integers.
 *   Example:  "=80x24+300-49"
 *   The equal sign is optional.
 *   It returns a bitmask that indicates which of the four values
 *   were actually found in the string.  For each value found,
 *   the corresponding argument is updated;  for each value
 *   not found, the corresponding argument is left unchanged. 
 */

static int ReadInteger(char* string, char** NextString)
{
  register int Result = 0;
  int Sign = 1;
    
  if (*string == '+')
    string++;
  else if (*string == '-') {
    string++;
    Sign = -1;
  }
  for (; (*string >= '0') && (*string <= '9'); string++) {
    Result = (Result * 10) + (*string - '0');
  }
  *NextString = string;
  if (Sign >= 0)
    return (Result);
  else
    return (-Result);
}

int XParseGeometry(const char* string, int* x, int* y,
                   unsigned int* width, unsigned int* height)
{
  int mask = NoValue;
  register char *strind;
  unsigned int tempWidth = 0, tempHeight = 0;
  int tempX = 0, tempY = 0;
  char *nextCharacter;

  if ( (string == NULL) || (*string == '\0')) return(mask);
  if (*string == '=')
    string++;  /* ignore possible '=' at beg of geometry spec */

  strind = (char *)string;
  if (*strind != '+' && *strind != '-' && *strind != 'x') {
    tempWidth = ReadInteger(strind, &nextCharacter);
    if (strind == nextCharacter) 
      return (0);
    strind = nextCharacter;
    mask |= WidthValue;
  }

  if (*strind == 'x' || *strind == 'X') {       
    strind++;
    tempHeight = ReadInteger(strind, &nextCharacter);
    if (strind == nextCharacter)
      return (0);
    strind = nextCharacter;
    mask |= HeightValue;
  }

  if ((*strind == '+') || (*strind == '-')) {
    if (*strind == '-') {
      strind++;
      tempX = -ReadInteger(strind, &nextCharacter);
      if (strind == nextCharacter)
        return (0);
      strind = nextCharacter;
      mask |= XNegative;

    } else {
      strind++;
      tempX = ReadInteger(strind, &nextCharacter);
      if (strind == nextCharacter)
        return(0);
      strind = nextCharacter;
      }
    mask |= XValue;
    if ((*strind == '+') || (*strind == '-')) {
      if (*strind == '-') {
        strind++;
        tempY = -ReadInteger(strind, &nextCharacter);
        if (strind == nextCharacter)
          return(0);
        strind = nextCharacter;
        mask |= YNegative;

      } else {
        strind++;
        tempY = ReadInteger(strind, &nextCharacter);
        if (strind == nextCharacter)
          return(0);
        strind = nextCharacter;
      }
      mask |= YValue;
    }
  }
        
  /* If strind isn't at the end of the string the it's an invalid
     geometry specification. */

  if (*strind != '\0') return (0);

  if (mask & XValue)
    *x = tempX;
  if (mask & YValue)
    *y = tempY;
  if (mask & WidthValue)
    *width = tempWidth;
  if (mask & HeightValue)
    *height = tempHeight;
  return (mask);
}

#endif // ifdef WIN32

//
// End of "$Id: Fl_arg.cxx 7903 2010-11-28 21:06:39Z matt $".
//