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/*
*
* $Id: k3bfilecompilationsizehandler.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3bfilecompilationsizehandler.h"
#include "k3bfileitem.h"
#include <kdebug.h>
#include <qfile.h>
#include <qmap.h>
#include <qptrlist.h>
// TODO: remove the items from the project if the savedSize differs
// with some info-widget: "Files xxx have changed on disk. Removing them from the project."
// or we just update the sizes!
static long usedBlocks( const KIO::filesize_t& bytes )
{
if( bytes % 2048 )
return bytes/2048 + 1;
else
return bytes/2048;
}
class InodeInfo
{
public:
InodeInfo() {
number = 0;
savedSize = 0;
}
/**
* How often has the file with
* the corresponding inode been added
*/
int number;
/**
* The size of the first added file. This has to be saved
* to check further addings and to avoid the following situation:
* A file with inode 1 is added, then deleted. Another file is created
* at inode 1 and added to the project. Now the first file gets
* removed and then the second. If we had not saved the size we would
* have added the size of the first and removed the size of the second
* file resulting in a corrupted project size.
* This way we always use the size of the first added file and may
* warn the user if sizes differ.
*/
KIO::filesize_t savedSize;
KIO::filesize_t completeSize() const { return savedSize*number; }
/**
* In an iso9660 filesystem a file occupies complete blocks of 2048 bytes.
*/
K3b::Msf blocks() const { return K3b::Msf( usedBlocks(savedSize) ); }
QPtrList<K3bDataItem> items;
};
class K3bFileCompilationSizeHandler::Private
{
public:
Private()
: size(0) {
}
void clear() {
inodeMap.clear();
size = 0;
blocks = 0;
}
void addFile( K3bFileItem* item, bool followSymlinks ) {
InodeInfo& inodeInfo = inodeMap[item->localId(followSymlinks)];
inodeInfo.items.append( item );
if( inodeInfo.number == 0 ) {
inodeInfo.savedSize = item->itemSize( followSymlinks );
size += inodeInfo.savedSize;
blocks += inodeInfo.blocks();
}
inodeInfo.number++;
}
void addSpecialItem( K3bDataItem* item ) {
// special files do not have a corresponding local file
// so we just add their k3bSize
size += item->size();
blocks += usedBlocks(item->size());
specialItems.append( item );
}
void removeFile( K3bFileItem* item, bool followSymlinks ) {
InodeInfo& inodeInfo = inodeMap[item->localId(followSymlinks)];
if( inodeInfo.items.findRef( item ) == -1 ) {
kdError() << "(K3bFileCompilationSizeHandler) "
<< item->localPath()
<< " has been removed without being added!" << endl;
}
else {
if( item->itemSize(followSymlinks) != inodeInfo.savedSize ) {
kdError() << "(K3bFileCompilationSizeHandler) savedSize differs!" << endl;
}
inodeInfo.items.removeRef( item );
inodeInfo.number--;
if( inodeInfo.number == 0 ) {
size -= inodeInfo.savedSize;
blocks -= inodeInfo.blocks();
}
}
}
void removeSpecialItem( K3bDataItem* item ) {
// special files do not have a corresponding local file
// so we just substract their k3bSize
if( specialItems.findRef( item ) == -1 ) {
kdError() << "(K3bFileCompilationSizeHandler) Special item "
<< item->k3bName()
<< " has been removed without being added!" << endl;
}
else {
specialItems.removeRef( item );
size -= item->size();
blocks -= usedBlocks(item->size());
}
}
/**
* This maps from inodes to the number of occurrences of the inode.
*/
QMap<K3bFileItem::Id, InodeInfo> inodeMap;
KIO::filesize_t size;
K3b::Msf blocks;
QPtrList<K3bDataItem> specialItems;
};
K3bFileCompilationSizeHandler::K3bFileCompilationSizeHandler()
{
d_symlinks = new Private;
d_noSymlinks = new Private;
}
K3bFileCompilationSizeHandler::~K3bFileCompilationSizeHandler()
{
delete d_symlinks;
delete d_noSymlinks;
}
const KIO::filesize_t& K3bFileCompilationSizeHandler::size( bool followSymlinks ) const
{
if( followSymlinks )
return d_noSymlinks->size;
else
return d_symlinks->size;
}
const K3b::Msf& K3bFileCompilationSizeHandler::blocks( bool followSymlinks ) const
{
if( followSymlinks )
return d_noSymlinks->blocks;
else
return d_symlinks->blocks;
}
void K3bFileCompilationSizeHandler::addFile( K3bDataItem* item )
{
if( item->isSpecialFile() ) {
d_symlinks->addSpecialItem( item );
d_noSymlinks->addSpecialItem( item );
}
else if( item->isFile() ) {
K3bFileItem* fileItem = static_cast<K3bFileItem*>( item );
d_symlinks->addFile( fileItem, false );
d_noSymlinks->addFile( fileItem, true );
}
}
void K3bFileCompilationSizeHandler::removeFile( K3bDataItem* item )
{
if( item->isSpecialFile() ) {
d_symlinks->removeSpecialItem( item );
d_noSymlinks->removeSpecialItem( item );
}
else if( item->isFile() ) {
K3bFileItem* fileItem = static_cast<K3bFileItem*>( item );
d_symlinks->removeFile( fileItem, false );
d_noSymlinks->removeFile( fileItem, true );
}
}
void K3bFileCompilationSizeHandler::clear()
{
d_symlinks->clear();
d_noSymlinks->clear();
}
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