# Directory Browsing

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

The directory manager generates directory listings for FTP and HTTP requests. This module contains the protocol independent code and it produces the HTML object. It is only included if either the FTP or the File module is included.

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

    #ifndef HTDIR_H
    #define HTDIR_H
    #include "HTReq.h"
    #include "HTIcons.h"

## What Should the Listings Look Like?

If the `HT_DS_DES` is set then the Description field is added as the last column in the listing. File descriptions are queried from the HTDescript module. Make a full mask by adding/oring the following flags:

    typedef enum _HTDirShow {
        HT_DS_SIZE  = 0x1,			/* Show file size using K, M and G? */
        HT_DS_DATE  = 0x2,			/* Show last modified date? */
        HT_DS_HID   = 0x4,			/* Show hidden files? */
        HT_DS_DES	= 0x8,			/* Show descriptions? */
        HT_DS_ICON  = 0x10,			/* Show icons? */
        HT_DS_HOTI  = 0x20			/* Are Icons hot or cold? */
    } HTDirShow;

    typedef enum _HTDirKey {
        HT_DK_NONE	= 0,			/* No sorting */
        HT_DK_CSEN	= 1,			/* Case sensitive */
        HT_DK_CINS  = 2			/* Case insensitive */
    } HTDirKey;

### Length of Filenames and Descriptions

The module automatically ajusts the width of the directory listing as a function of the file name. The width can flows dynamically between an upper and a lower limit. The maximum length of this field is specified by

    extern BOOL HTDir_setWidth (int minfile, int maxfile);

## The Directory Object

The directory object handles the generation of a directory listing. It is a bit like a stream in that it accept data, but it must be formatted in a special way which makes the normal stream architecture inadequate.

### Width of File Names

The module automatically ajusts the width of the directory listing as a function of the file name. The width can flows dynamically between an upper and a lower limit.

    extern BOOL HTDir_setWidth (int minfile, int maxfile);

### Create a Directory Object

Creates a structured stream object and sets up the initial HTML stuff Returns the dir object if OK, else NULL

    typedef struct _HTDir HTDir;

    extern HTDir * HTDir_new (HTRequest * request, HTDirShow show, HTDirKey key);

### Add a Line to the List

This function accepts a directory line. "data" and "size", and "description" can all be NULL. Returns YES if OK, else NO

    extern BOOL HTDir_addElement	(HTDir *dir, char *name, char *date,
    				 char *size, HTFileMode mode);

### Free a Directory Obejct

If we are sorting then do the sorting and put out the list, else just append the end of the list.

    extern BOOL HTDir_free (HTDir * dir);

    #endif /* HTDIR */