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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "nsISupports.idl"
interface nsIChannel;
interface nsIInputStream;
interface nsIRequestObserver;
interface nsIFile;
interface nsIZipEntry;
/**
* nsIZipWriter
*
* An interface for a zip archiver that can be used from script.
*
* The interface supports both a synchronous method of archiving data and a
* queueing system to allow operations to be prepared then run in sequence
* with notification after completion.
*
* Operations added to the queue do not get performed until performQueue is
* called at which point they will be performed in the order that they were
* added to the queue.
*
* Operations performed on the queue will throw any errors out to the
* observer.
*
* An attempt to perform a synchronous operation while the background queue
* is in progress will throw NS_ERROR_IN_PROGRESS.
*
* Entry names should use /'s as path separators and should not start with
* a /.
*
* It is not generally necessary to add directory entries in order to add file
* entries within them, however it is possible that some zip programs may
* experience problems what that.
*/
[scriptable, uuid(3ca10750-797e-4a22-bcfe-66170b5e96dd)]
interface nsIZipWriter : nsISupports
{
/**
* Some predefined compression levels
*/
const uint32_t COMPRESSION_NONE = 0;
const uint32_t COMPRESSION_FASTEST = 1;
const uint32_t COMPRESSION_DEFAULT = 6;
const uint32_t COMPRESSION_BEST = 9;
/**
* Gets or sets the comment associated with the open zip file.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
*/
attribute ACString comment;
/**
* Indicates that operations on the background queue are being performed.
*/
readonly attribute boolean inQueue;
/**
* The file that the zipwriter is writing to.
*/
readonly attribute nsIFile file;
/**
* Opens a zip file.
*
* @param aFile the zip file to open
* @param aIoFlags the open flags for the zip file from prio.h
*
* @throws NS_ERROR_ALREADY_INITIALIZED if a zip file is already open
* @throws NS_ERROR_INVALID_ARG if aFile is null
* @throws NS_ERROR_FILE_NOT_FOUND if aFile does not exist and flags did
* not allow for creation
* @throws NS_ERROR_FILE_CORRUPTED if the file does not contain zip markers
* @throws <other-error> on failure to open zip file (most likely corrupt
* or unsupported form)
*/
void open(in nsIFile aFile, in int32_t aIoFlags);
/**
* Returns a nsIZipEntry describing a specified zip entry or null if there
* is no such entry in the zip file
*
* @param aZipEntry the path of the entry
*/
nsIZipEntry getEntry(in AUTF8String aZipEntry);
/**
* Checks whether the zipfile contains an entry specified by zipEntry.
*
* @param aZipEntry the path of the entry
*/
boolean hasEntry(in AUTF8String aZipEntry);
/**
* Adds a new directory entry to the zip file. If aZipEntry does not end with
* "/" then it will be added.
*
* @param aZipEntry the path of the directory entry
* @param aModTime the modification time of the entry in microseconds
* @param aQueue adds the operation to the background queue. Will be
* performed when processQueue is called.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_FILE_ALREADY_EXISTS if the path already exists in the
* file
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws NS_ERROR_INVALID_ARG if aModTime is older than 1980-1-1
*/
void addEntryDirectory(in AUTF8String aZipEntry, in PRTime aModTime,
in boolean aQueue);
/**
* Adds a new file or directory to the zip file. If the specified file is
* a directory then this will be equivalent to a call to
* addEntryDirectory(aZipEntry, aFile.lastModifiedTime, aQueue)
*
* @param aZipEntry the path of the file entry
* @param aCompression the compression level, 0 is no compression, 9 is best
* @param aFile the file to get the data and modification time from
* @param aQueue adds the operation to the background queue. Will be
* performed when processQueue is called.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_FILE_ALREADY_EXISTS if the path already exists in the zip
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws NS_ERROR_FILE_NOT_FOUND if file does not exist
*/
void addEntryFile(in AUTF8String aZipEntry,
in int32_t aCompression, in nsIFile aFile,
in boolean aQueue);
/**
* Adds data from a channel to the zip file. If the operation is performed
* on the queue then the channel will be opened asynchronously, otherwise
* the channel must support being opened synchronously.
*
* @param aZipEntry the path of the file entry
* @param aModTime the modification time of the entry in microseconds
* @param aCompression the compression level, 0 is no compression, 9 is best
* @param aChannel the channel to get the data from
* @param aQueue adds the operation to the background queue. Will be
* performed when processQueue is called.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_FILE_ALREADY_EXISTS if the path already exists in the zip
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws NS_ERROR_INVALID_ARG if aModTime is older than 1980-1-1
*/
void addEntryChannel(in AUTF8String aZipEntry, in PRTime aModTime,
in int32_t aCompression, in nsIChannel aChannel,
in boolean aQueue);
/**
* Adds data from an input stream to the zip file.
*
* @param aZipEntry the path of the file entry
* @param aModTime the modification time of the entry in microseconds
* @param aCompression the compression level, 0 is no compression, 9 is best
* @param aStream the input stream to get the data from
* @param aQueue adds the operation to the background queue. Will be
* performed when processQueue is called.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_FILE_ALREADY_EXISTS if the path already exists in the zip
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws NS_ERROR_INVALID_ARG if aModTime is older than 1980-1-1
*/
void addEntryStream(in AUTF8String aZipEntry, in PRTime aModTime,
in int32_t aCompression, in nsIInputStream aStream,
in boolean aQueue);
/**
* Removes an existing entry from the zip file.
*
* @param aZipEntry the path of the entry to be removed
* @param aQueue adds the operation to the background queue. Will be
* performed when processQueue is called.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws NS_ERROR_FILE_NOT_FOUND if no entry with the given path exists
* @throws <other-error> on failure to update the zip file
*/
void removeEntry(in AUTF8String aZipEntry, in boolean aQueue);
/**
* Processes all queued items until complete or some error occurs. The
* observer will be notified when the first operation starts and when the
* last operation completes. Any failures will be passed to the observer.
* The zip writer will be busy until the queue is complete or some error
* halted processing of the queue early. In the event of an early failure,
* remaining items will stay in the queue and calling processQueue will
* continue.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_IN_PROGRESS if the queue is already in progress
*/
void processQueue(in nsIRequestObserver aObserver, in nsISupports aContext);
/**
* Closes the zip file.
*
* @throws NS_ERROR_NOT_INITIALIZED if no zip file has been opened
* @throws NS_ERROR_IN_PROGRESS if another operation is currently in progress
* @throws <other-error> on failure to complete the zip file
*/
void close();
/**
* Make all stored(uncompressed) files align to given alignment size.
*
* @param aAlignSize is the alignment size, valid values from 2 to 32768, and
must be power of 2.
*
* @throws NS_ERROR_INVALID_ARG if aAlignSize is invalid
* @throws <other-error> on failure to update the zip file
*/
void alignStoredFiles(in uint16_t aAlignSize);
};
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