hticons.h

www工具包

/*


  					W3C Sample Code Library libwww Icon Management


!
  Icon Management
!
*/

/*
**	(c) COPYRIGHT MIT 1995.
**	Please first read the full copyright statement in the file COPYRIGH.
*/

/*

Icons for directory listsings etc. are bound to MIME
content-types and content-encodings as described
in the format manager. These functions bind icon
URLs to given content-type or encoding templates. Templates
containing a slash are taken to be content-type templates, other
are content-encoding templates.

This module is implemented by HTIcons.c, and it is
a part of the  W3C Sample Code
Library.
*/

#ifndef HTICONS_H
#define HTICONS_H

#include "WWWLib.h"

/*
*/

typedef struct _HTIconNode HTIconNode;

/*
.
  Add new Icons
.

All of these functions take an absolute URL and alternate text to use. Add
an icon the list
(
  Generic Icons
)
*/
extern BOOL HTIcon_add (const char * url, const char * prefix,
				char * alt, char * type_templ);

/*
(
  Specific Icons
)

We also have a special set of icons used to represent well-known things in
direcctory listings.

  Unknown Icon


Add a unknown icon representing files that we can't figure out what is and
hence can`'t come up with a better icon.
*/
extern BOOL HTIcon_addUnknown (const char * url, const char * prefix,
				char * alt);

/*

  Empty Icon


In order to aligned HTML pages for directory listings in preformatted mode,
we need an empty (or blank) icon of the same size as the other icons.
*/
extern BOOL HTIcon_addBlank (const char * url, const char * prefix,
				char * alt);

/*

  Parent Icon


Add an icon representing a level up in a directory listing - the parent
directory.
*/
extern BOOL HTIcon_addParent (const char * url, const char * prefix,
				char * alt);

/*

  Directory Icon


This icon represents a directory or a folder
*/
extern BOOL HTIcon_addDir (const char * url, const char * prefix,
				char * alt);

/*
.
  Find an Icon
.

This is a simplified file mode enumeration that can is used in directory
listings.
*/

typedef  enum _HTFileMode {
    HT_IS_FILE,				/* Normal file */
    HT_IS_DIR,				/* Directory */
    HT_IS_BLANK,			/* Blank Icon */
    HT_IS_PARENT			/* Parent Directory */
} HTFileMode;


extern HTIconNode * HTIcon_find (HTFileMode	mode,
				 HTFormat	content_type,
				 HTEncoding	content_encoding);

/*
.
  Icon URL
.

When you want to add the icon reference into a directory listing, you can
get the URL of the icon by using this method. Don't free or modify the string
returned!
*/
extern char * HTIcon_url (HTIconNode * node);

/*
.
  Alternative text
.

Get the alternative text (if any) for text based clients or if you don't
want to download the image right away. The string returned must be freed
by the caller.
*/
extern char * HTIcon_alternative (HTIconNode * node, BOOL brackets);

/*
.
  A Standard Set of Icons
.

The WWWFile interface does not define a default
set of icons but the Library distribution files comes with a standard
set of icons that can be used if desired. The Icons can be found in
$(datadir)/www-icons.The set covers the types described below
and they can be set up using the HTIconInit()
initialization function in the WWWInit startup
interface

	 
	   o 
	     blank.xbm for the blank icon
  o 
	     directory.xbm for directory icon
  o 
	     back.xbm for parent directory
  o 
	     unknown.xbm for unknown icon
  o 
	     binary.xbm for binary files
  o 
	     text.xbm for ascii files
  o 
	     image.xbm for image files
  o 
	     movie.xbm for video files
  o 
	     sound.xbm for audio files
  o 
	     tar.xbm for tar and gtar files
  o 
	     compressed.xbm for compressed and gzipped files

	 */

#endif /* HTICONS */

/*

  

  @(#) $Id: HTIcons.html,v 2.24 1998/05/14 02:10:35 frystyk Exp $

*/