/// chrome://wikilocaledit/content/fileIO.js
/// General file I/O interface
// Used by:
// * content/wikilocaledit.xul
/// 2012-12-12 PerfektesChaos@de.wikipedia
/// Fingerprint: #0#0#
/// <nowiki>
/*jshint curly:true, eqeqeq:true, newcap:false,
strict:true, undef:true, white:false */
/*global window */
/*jslint white: true */
/*globals window: true */
( function ( w, AppObj ) {
"use strict";
var FILEIO, IMPORT, First;
AppObj.fileIO = { };
FILEIO = AppObj.fileIO;
IMPORT = w.Components.utils[ "import" ];
IMPORT( "resource://gre/modules/FileUtils.jsm" );
IMPORT( "resource://gre/modules/NetUtil.jsm" );
/*
Public:
* FILEIO.feed()
* FILEIO.find()
* FILEIO.flush()
*/
First = function () {
// Initialize file IO components, (re-)open local file
// Postcondition:
// Returns new opened file handle
// Uses:
// w
// FILEIO
// >< .fileIO.chrome
// < .fileIO.converter
// < .fileIO.fileLocal
// < .fileIO.filePicker
// < .fileIO.nsIFilePicker
// 2012-11-30 PerfektesChaos@de.wikipedia
var cif = w.Components.interfaces;
FILEIO.fileLocal = null;
if ( ! FILEIO.chrome ) {
FILEIO.converter = w.Components
.classes[ "@mozilla.org/intl/scriptableunicodeconverter" ]
.createInstance( cif.nsIScriptableUnicodeConverter );
FILEIO.nsIFilePicker = cif.nsIFilePicker;
FILEIO.filePicker = w.Components
.classes[ "@mozilla.org/filepicker;1" ]
.createInstance( cif.nsIFilePicker );
FILEIO.chrome = true;
}
FILEIO.fileLocal = w.Components
.classes[ "@mozilla.org/file/local;1" ]
.createInstance( cif.nsILocalFile );
return FILEIO.fileLocal;
}; // First()
FILEIO.feed = function ( appoint, access, after, ansi ) {
// Retrieve file content for certain file path
// Precondition:
// appoint -- full file path and name
// access -- document of user web page
// after -- callback function, called when reading completed
// called with Array, or false
// [0] path (appoint)
// [1] true: write protected
// [2] content, or false
// [3] document
// ansi -- input file is not utf-8
// Postcondition:
// Returns true if failed
// Uses:
// this
// w
// First()
// 2012-11-24 PerfektesChaos@de.wikipedia
var file,
lock = false,
r = true;
file = First();
file.initWithPath( appoint );
if ( w.NetUtil ) {
w.NetUtil.asyncFetch( file,
function( inputStream, status ) {
var data,
live,
opt = null;
if ( w.Components.isSuccessCode( status ) ) {
if ( ! ansi ) {
opt = { "charset": "UTF-8" };
}
live = inputStream.available();
data = w.NetUtil.readInputStreamToString( inputStream,
live,
opt );
} else {
data = false;
lock = true;
}
after( [ appoint, lock, data, access ] );
}
);
r = false;
}
return r;
}; // .fileIO.feed()
FILEIO.find = function ( adult, apply, assign, add, about, allow ) {
// Retrieve path to file or directory
// Precondition:
// adult -- string with parent directory, or empty
// apply -- false: directory; object: search pattern Array
// object modeOpen 0 Load or save a file
// [0] title for dialog
// [1] extension pattern
// false modeGetFolder 2 Select a folder/directory
// assign -- suggestion for file name
// add -- default extension, or false
// about -- UI window title
// allow -- save a non-existing file, modeSave 1
// Postcondition:
// Returns string with full path, or false
// Uses:
// this
// w
// > .fileIO.nsIFilePicker
// > .fileIO.fileLocal
// >< .fileIO.filePicker
// First()
// 2012-12-12 PerfektesChaos@de.wikipedia
var dir,
get,
mode = "modeOpen",
nod,
r = false;
First();
get = this.filePicker;
if ( get ) {
if ( adult ) {
try {
dir = this.fileLocal;
dir.initWithPath( adult );
if ( dir ) {
get.displayDirectory = dir;
}
} catch ( e ) {
}
}
if ( apply ) {
if ( typeof apply === "object" ) {
get.appendFilter( apply[ 0 ], apply[ 1 ] );
}
mode = ( allow ? "modeSave" : "modeOpen" );
} else {
get.appendFilter( "", "" );
mode = "modeGetFolder";
}
get.defaultString = ( assign ? assign : "" );
get.defaultExtension = ( add ? add : "" );
get.init( w,
( about ? about : "Wiki LocalEdit" ),
FILEIO.nsIFilePicker[ mode ] );
nod = get.show(); // deprecated since Gecko 17
// get.open(); // requires Gecko 17
if ( nod === FILEIO.nsIFilePicker.returnOK ||
nod === FILEIO.nsIFilePicker.returnReplace ) {
r = get.file.path;
}
}
return r;
}; // .fileIO.find()
FILEIO.flush = function ( apply, appoint, access, after, arglist ) {
// Write asynchrously to local file
// Precondition:
// apply -- wikitext
// appoint -- full file path and name
// access -- document of user web page
// after -- callback function, called when writing completed
// called with status code and arglist
// arglist -- additianal parameters for after
// Postcondition:
// Returns false if successful started
// Uses:
// this
// w
// > .fileIO.converter
// First()
// 2012-11-30 PerfektesChaos@de.wikipedia
var file,
istream,
ostream,
r = true;
file = First();
file.initWithPath( appoint );
if ( w.FileUtils && w.NetUtil ) {
if ( file.exists() ) {
if ( ! file.isWritable() ) {
r = "fileNotWritable";
}
}
if ( r === true ) {
this.converter.charset = "UTF-8";
istream = this.converter.convertToInputStream( apply );
ostream = w.FileUtils.openSafeFileOutputStream( file );
w.NetUtil.asyncCopy( istream,
ostream,
function (status) {
after(status, arglist);
}
);
r = false;
}
}
return r;
}; // .fileIO.flush()
} ( window, window.wikiLocalEdit ) );
/// EOF </nowiki> content/fileIO.js
