pjs/xpcom/io/nsILocalFile.idl

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Doug Turner <dougt@netscape.com>
 *   Darin Fisher <darin@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIFile.idl"

%{C++
#include "prio.h"
#include "prlink.h"
#include <stdio.h>
%}

[ptr] native PRFileDescStar(PRFileDesc);
[ptr] native PRLibraryStar(PRLibrary);
[ptr] native FILE(FILE);

/**
 * This interface adds methods to nsIFile that are particular to a file
 * that is accessible via the local file system.
 *
 * It follows the same string conventions as nsIFile.
 */
[scriptable, uuid(aa610f20-a889-11d3-8c81-000064657374)]
interface nsILocalFile : nsIFile
{
    /**
     *  initWith[Native]Path
     *
     *  This function will initialize the nsILocalFile object.  Any
     *  internal state information will be reset.
     *
     *   @param filePath       
     *       A string which specifies a full file path to a 
     *       location.  Relative paths will be treated as an
     *       error (NS_ERROR_FILE_UNRECOGNIZED_PATH).  For 
     *       initWithNativePath, the filePath must be in the native
     *       filesystem charset.
     */
    void initWithPath(in AString filePath);
    [noscript] void initWithNativePath(in ACString filePath);
    
    /**
     *  initWithFile
     *
     *  Initialize this object with another file
     *
     *   @param aFile
     *       the file this becomes equivalent to
     */
    void initWithFile(in nsILocalFile aFile);
    
    /**
     *  followLinks
     *
     *  This attribute will determine if the nsLocalFile will auto
     *  resolve symbolic links.  By default, this value will be false
     *  on all non unix systems.  On unix, this attribute is effectively
     *  a noop.  
     */
    attribute boolean followLinks;  

    const unsigned long OS_READAHEAD = 0x40000000;
    const unsigned long DELETE_ON_CLOSE = 0x80000000;

    /**
     * Return the result of PR_Open on the file.  The caller is
     * responsible for calling PR_Close on the result.
     *
     * @param flags the PR_Open flags from prio.h, plus optionally
     * OS_READAHEAD or DELETE_ON_CLOSE. OS_READAHEAD is a hint to the
     * OS that the file will be read sequentially with agressive
     * readahead. DELETE_ON_CLOSE may be implemented by removing the
     * file (by path name) immediately after opening it, so beware of
     * possible races; the file should be exclusively owned by this
     * process.
     */
    [noscript] PRFileDescStar openNSPRFileDesc(in long flags, in long mode);

    /**
     * Return the result of fopen on the file.  The caller is
     * responsible for calling fclose on the result.
     */
    [noscript] FILE           openANSIFileDesc(in string mode);

    /**
     * Return the result of PR_LoadLibrary on the file.  The caller is
     * responsible for calling PR_UnloadLibrary on the result.
     */
    [noscript] PRLibraryStar  load();

    // number of bytes available on disk to non-superuser
    readonly attribute PRInt64 diskSpaceAvailable;

    /**
     *  appendRelative[Native]Path
     *
     *  Append a relative path to the current path of the nsILocalFile object.
     *
     *   @param relativeFilePath
     *       relativeFilePath is a native relative path. For security reasons,
     *       this cannot contain .. or cannot start with a directory separator.
     *       For the |appendRelativeNativePath| method, the relativeFilePath 
     *       must be in the native filesystem charset.
     */
    void appendRelativePath(in AString relativeFilePath);
    [noscript] void appendRelativeNativePath(in ACString relativeFilePath);
    
    /**
     *  Accessor to a null terminated string which will specify
     *  the file in a persistent manner for disk storage.
     *
     *  The character set of this attribute is undefined.  DO NOT TRY TO
     *  INTERPRET IT AS HUMAN READABLE TEXT!
     */
    attribute ACString persistentDescriptor;

    /** 
     *  reveal
     *
     *  Ask the operating system to open the folder which contains
     *  this file or folder. This routine only works on platforms which 
     *  support the ability to open a folder and is run async on Windows.  
     *  This routine must be called on the main. 
     */
    void reveal();
    
    /** 
     *  launch
     *
     *  Ask the operating system to attempt to open the file. 
     *  this really just simulates "double clicking" the file on your platform.
     *  This routine only works on platforms which support this functionality
     *  and is run async on Windows.  This routine must be called on the 
     *  main thread. 
     */
    void launch();
    
    /**
     *  getRelativeDescriptor
     *
     *  Returns a relative file path in an opaque, XP format. It is therefore
     *  not a native path.
     *
     *  The character set of the string returned from this function is
     *  undefined.  DO NOT TRY TO INTERPRET IT AS HUMAN READABLE TEXT!
     *
     *   @param fromFile
     *       the file from which the descriptor is relative.
     *       There is no defined result if this param is null.
     */
    ACString getRelativeDescriptor(in nsILocalFile fromFile);

    /**
     *  setRelativeDescriptor
     *
     *  Initializes the file to the location relative to fromFile using
     *  a string returned by getRelativeDescriptor.
     *
     *   @param fromFile
     *       the file to which the descriptor is relative
     *   @param relative
     *       the relative descriptor obtained from getRelativeDescriptor
     */
    void setRelativeDescriptor(in nsILocalFile fromFile, in ACString relativeDesc);    
};