fl_file_browser.cxx

SRI international 发布的OAA框架软件

//
// "$Id: Fl_File_Browser.cxx,v 1.1.1.1 2003/06/03 22:25:42 agno Exp $"
//
// Fl_File_Browser routines.
//
// Copyright 1999-2003 by Michael Sweet.
//
// 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 to "[e-mail]".
//
// Contents:
//
//   Fl_File_Browser::full_height()     - Return the height of the list.
//   Fl_File_Browser::item_height()     - Return the height of a list item.
//   Fl_File_Browser::item_width()      - Return the width of a list item.
//   Fl_File_Browser::item_draw()       - Draw a list item.
//   Fl_File_Browser::Fl_File_Browser() - Create a Fl_File_Browser widget.
//   Fl_File_Browser::load()            - Load a directory into the browser.
//   Fl_File_Browser::filter()          - Set the filename filter.
//

//
// Include necessary header files...
//

#include <FL/Fl_File_Browser.H>
#include <FL/fl_draw.H>
#include <FL/filename.H>
#include <stdio.h>
#include <stdlib.h>
#include "flstring.h"

#ifdef __CYGWIN__
#  include <mntent.h>
#elif defined(WIN32)
#  include <windows.h>
#  include <direct.h>
// Apparently Borland C++ defines DIRECTORY in <direct.h>, which
// interfers with the Fl_File_Icon enumeration of the same name.
#  ifdef DIRECTORY
#    undef DIRECTORY
#  endif // DIRECTORY
#endif // __CYGWIN__

#ifdef __EMX__
#  define  INCL_DOS
#  define  INCL_DOSMISC
#  include <os2.h>
#endif // __EMX__

// CodeWarrior (__MWERKS__) gets its include paths confused, so we
// temporarily disable this...
#if defined(__APPLE__) && !defined(__MWERKS__)
#  include <sys/param.h>
#  include <sys/ucred.h>
#  include <sys/mount.h>
#endif // __APPLE__ && !__MWERKS__


//
// FL_BLINE definition from "Fl_Browser.cxx"...
//

#define SELECTED 1
#define NOTDISPLAYED 2

struct FL_BLINE			// data is in a linked list of these
{
  FL_BLINE	*prev;		// Previous item in list
  FL_BLINE	*next;		// Next item in list
  void		*data;		// Pointer to data (function)
  short		length;		// sizeof(txt)-1, may be longer than string
  char		flags;		// selected, displayed
  char		txt[1];		// start of allocated array
};


//
// 'Fl_File_Browser::full_height()' - Return the height of the list.
//

int					// O - Height in pixels
Fl_File_Browser::full_height() const
{
  int	i,				// Looping var
	th;				// Total height of list.


  for (i = 0, th = 0; i < size(); i ++)
    th += item_height(find_line(i));

  return (th);
}


//
// 'Fl_File_Browser::item_height()' - Return the height of a list item.
//

int					// O - Height in pixels
Fl_File_Browser::item_height(void *p) const	// I - List item data
{
  FL_BLINE	*line;			// Pointer to line
  char		*t;			// Pointer into text
  int		height;			// Width of line
  int		textheight;		// Height of text


  // Figure out the standard text height...
  fl_font(textfont(), textsize());
  textheight = fl_height();

  // We always have at least 1 line...
  height = textheight;

  // Scan for newlines...
  line = (FL_BLINE *)p;

  if (line != NULL)
    for (t = line->txt; *t != '\0'; t ++)
      if (*t == '\n')
	height += textheight;

  // If we have enabled icons then add space for them...
  if (Fl_File_Icon::first() != NULL && height < iconsize_)
    height = iconsize_;

  // Add space for the selection border..
  height += 2;

  // Return the height
  return (height);
}


//
// 'Fl_File_Browser::item_width()' - Return the width of a list item.
//

int					// O - Width in pixels
Fl_File_Browser::item_width(void *p) const	// I - List item data
{
  int		i;			// Looping var
  FL_BLINE	*line;			// Pointer to line
  char		*t,			// Pointer into text
		*ptr,			// Pointer into fragment
		fragment[10240];	// Fragment of text
  int		width,			// Width of line
		tempwidth;		// Width of fragment
  int		column;			// Current column
  const int	*columns;		// Columns


  // Set the font and size...
  fl_font(textfont(), textsize());

  // Scan for newlines...
  line    = (FL_BLINE *)p;
  columns = column_widths();

  if (strchr(line->txt, '\n') == NULL &&
      strchr(line->txt, column_char()) == NULL)
  {
    // Do a fast width calculation...
    width = (int)fl_width(line->txt);
  }
  else
  {
    // More than 1 line or have columns; find the maximum width...
    width     = 0;
    tempwidth = 0;
    column    = 0;

    for (t = line->txt, ptr = fragment; *t != '\0'; t ++)
      if (*t == '\n')
      {
        // Newline - nul terminate this fragment and get the width...
        *ptr = '\0';

	tempwidth += (int)fl_width(fragment);

        // Update the max width as needed...
	if (tempwidth > width)
	  width = tempwidth;

        // Point back to the start of the fragment...
	ptr       = fragment;
	tempwidth = 0;
	column    = 0;
      }
      else if (*t == column_char())
      {
        // Advance to the next column...
        column ++;
	if (columns)
	{
	  for (i = 0, tempwidth = 0; i < column && columns[i]; i ++)
	    tempwidth += columns[i];
	}
	else
          tempwidth = column * (int)(fl_height() * 0.6 * 8.0);

        if (tempwidth > width)
	  width = tempwidth;

	ptr = fragment;
      }
      else
        *ptr++ = *t;

    if (ptr > fragment)
    {
      // Nul terminate this fragment and get the width...
      *ptr = '\0';

      tempwidth += (int)fl_width(fragment);

      // Update the max width as needed...
      if (tempwidth > width)
	width = tempwidth;
    }
  }

  // If we have enabled icons then add space for them...
  if (Fl_File_Icon::first() != NULL)
    width += iconsize_ + 8;

  // Add space for the selection border..
  width += 2;

  // Return the width
  return (width);
}


//
// 'Fl_File_Browser::item_draw()' - Draw a list item.
//

void
Fl_File_Browser::item_draw(void *p,	// I - List item data
                 	   int  X,	// I - Upper-lefthand X coordinate
		 	   int  Y,	// I - Upper-lefthand Y coordinate
		 	   int  W,	// I - Width of item
			   int) const	// I - Height of item
{
  int		i;			// Looping var
  FL_BLINE	*line;			// Pointer to line
  Fl_Color	c;			// Text color
  char		*t,			// Pointer into text
		*ptr,			// Pointer into fragment
		fragment[10240];	// Fragment of text
  int		width,			// Width of line
		height;			// Height of line
  int		column;			// Current column
  const int	*columns;		// Columns


  // Draw the list item text...
  line = (FL_BLINE *)p;

  if (line->txt[strlen(line->txt) - 1] == '/')
    fl_font(textfont() | FL_BOLD, textsize());
  else
    fl_font(textfont(), textsize());

  if (line->flags & SELECTED)
    c = fl_contrast(textcolor(), selection_color());
  else
    c = textcolor();

  if (Fl_File_Icon::first() == NULL)
  {
    // No icons, just draw the text...
    X ++;
    W -= 2;
  }
  else
  {
    // Draw the icon if it is set...
    if (line->data)
      ((Fl_File_Icon *)line->data)->draw(X, Y, iconsize_, iconsize_,
                                	(line->flags & SELECTED) ? FL_YELLOW :
				                                   FL_LIGHT2,
					active_r());

    // Draw the text offset to the right...
    X += iconsize_ + 9;
    W -= iconsize_ - 10;

    // Center the text vertically...
    height = fl_height();

    for (t = line->txt; *t != '\0'; t ++)
      if (*t == '\n')
	height += fl_height();

    if (height < iconsize_)
      Y += (iconsize_ - height) / 2;
  }

  // Draw the text...
  line    = (FL_BLINE *)p;
  columns = column_widths();
  width   = 0;
  column  = 0;

  if (active_r())
    fl_color(c);
  else