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office-gobmx/svtools/source/misc/templatefoldercache.cxx
Noel Grandin 16a9092595 loplugin:ostr in svtools 
Change-Id: If00c16527fb861a86f5dde195ab612bbab3a53c0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/167594
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins
2024-05-13 19:13:53 +02:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <osl/file.hxx>
#include <svtools/templatefoldercache.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <com/sun/star/sdbc/XResultSet.hpp>
#include <com/sun/star/ucb/XDynamicResultSet.hpp>
#include <com/sun/star/sdbc/XRow.hpp>
#include <com/sun/star/ucb/CommandAbortedException.hpp>
#include <com/sun/star/ucb/XContentAccess.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/util/theOfficeInstallationDirectories.hpp>
#include <ucbhelper/content.hxx>
#include <osl/diagnose.h>
#include <rtl/ref.hxx>
#include <salhelper/simplereferenceobject.hxx>
#include <tools/time.hxx>
#include <tools/urlobj.hxx>
#include <tools/debug.hxx>
#include <comphelper/diagnose_ex.hxx>
#include <unotools/pathoptions.hxx>
#include <comphelper/processfactory.hxx>
#include <mutex>
#include <utility>
#include <vector>
#include <algorithm>
namespace svt
{
using namespace ::utl;
using namespace ::com::sun::star;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::ucb;
using namespace ::com::sun::star::uno;
//= helpers
static SvStream& WriteDateTime( SvStream& _rStorage, const util::DateTime& _rDate )
{
sal_uInt16 hundredthSeconds = static_cast< sal_uInt16 >( _rDate.NanoSeconds / tools::Time::nanoPerCenti );
_rStorage.WriteUInt16( hundredthSeconds );
_rStorage.WriteUInt16( _rDate.Seconds );
_rStorage.WriteUInt16( _rDate.Minutes );
_rStorage.WriteUInt16( _rDate.Hours );
_rStorage.WriteUInt16( _rDate.Day );
_rStorage.WriteUInt16( _rDate.Month );
_rStorage.WriteInt16( _rDate.Year );
return _rStorage;
}
static SvStream& operator >> ( SvStream& _rStorage, util::DateTime& _rDate )
{
sal_uInt16 hundredthSeconds;
_rStorage.ReadUInt16( hundredthSeconds );
_rDate.NanoSeconds = static_cast< sal_uInt32 >( hundredthSeconds ) * tools::Time::nanoPerCenti;
_rStorage.ReadUInt16( _rDate.Seconds );
_rStorage.ReadUInt16( _rDate.Minutes );
_rStorage.ReadUInt16( _rDate.Hours );
_rStorage.ReadUInt16( _rDate.Day );
_rStorage.ReadUInt16( _rDate.Month );
_rStorage.ReadInt16( _rDate.Year );
return _rStorage;
}
//= TemplateContent
namespace {
struct TemplateContent;
}
typedef ::std::vector< ::rtl::Reference< TemplateContent > > TemplateFolderContent;
typedef TemplateFolderContent::const_iterator ConstFolderIterator;
typedef TemplateFolderContent::iterator FolderIterator;
namespace {
/** a struct describing one content in one of the template dirs (or at least it's relevant aspects)
*/
struct TemplateContent : public ::salhelper::SimpleReferenceObject
{
public:
private:
INetURLObject m_aURL;
util::DateTime m_aLastModified; // date of last modification as reported by UCP
TemplateFolderContent m_aSubContents; // sorted (by name) list of the children
private:
void implResetDate( )
{
m_aLastModified.NanoSeconds = m_aLastModified.Seconds = m_aLastModified.Minutes = m_aLastModified.Hours = 0;
m_aLastModified.Day = m_aLastModified.Month = m_aLastModified.Year = 0;
}
private:
virtual ~TemplateContent() override;
public:
explicit TemplateContent( INetURLObject _aURL );
// attribute access
OUString getURL( ) const { return m_aURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ); }
void setModDate( const util::DateTime& _rDate ) { m_aLastModified = _rDate; }
const util::DateTime& getModDate( ) const { return m_aLastModified; }
TemplateFolderContent& getSubContents() { return m_aSubContents; }
const TemplateFolderContent& getSubContents() const { return m_aSubContents; }
ConstFolderIterator end() const { return m_aSubContents.end(); }
TemplateFolderContent::size_type
size() const { return m_aSubContents.size(); }
void push_back( const ::rtl::Reference< TemplateContent >& _rxNewElement )
{ m_aSubContents.push_back( _rxNewElement ); }
};
}
TemplateContent::TemplateContent( INetURLObject _aURL )
:m_aURL(std::move( _aURL ))
{
DBG_ASSERT( INetProtocol::NotValid != m_aURL.GetProtocol(), "TemplateContent::TemplateContent: invalid URL!" );
implResetDate();
}
TemplateContent::~TemplateContent()
{
}
//= stl helpers
namespace {
/// compares two TemplateContent by URL
struct TemplateContentURLLess
{
bool operator() ( const ::rtl::Reference< TemplateContent >& _rxLHS, const ::rtl::Reference< TemplateContent >& _rxRHS ) const
{
return _rxLHS->getURL() < _rxRHS->getURL();
}
};
/// sorts the sib contents of a TemplateFolderContent
struct SubContentSort
{
void operator() ( TemplateFolderContent& _rFolder ) const
{
// sort the directory by name
::std::sort(
_rFolder.begin(),
_rFolder.end(),
TemplateContentURLLess()
);
// sort the sub directories by name
::std::for_each(
_rFolder.begin(),
_rFolder.end(),
*this
);
}
void operator() ( const ::rtl::Reference< TemplateContent >& _rxContent ) const
{
if ( _rxContent.is() && _rxContent->size() )
{
operator()( _rxContent->getSubContents() );
}
}
};
/** does a deep compare of two template contents
*/
struct TemplateContentEqual
{
bool operator() (const ::rtl::Reference< TemplateContent >& _rLHS, const ::rtl::Reference< TemplateContent >& _rRHS )
{
if ( !_rLHS.is() || !_rRHS.is() )
{
OSL_FAIL( "TemplateContentEqual::operator(): invalid contents!" );
return true;
// this is not strictly true, in case only one is invalid - but this is a heavy error anyway
}
if ( _rLHS->getURL() != _rRHS->getURL() )
return false;
if ( _rLHS->getModDate() != _rRHS->getModDate() )
return false;
if ( _rLHS->getSubContents().size() != _rRHS->getSubContents().size() )
return false;
if ( !_rLHS->getSubContents().empty() )
{ // there are children
// -> compare them
::std::pair< FolderIterator, FolderIterator > aFirstDifferent = ::std::mismatch(
_rLHS->getSubContents().begin(),
_rLHS->getSubContents().end(),
_rRHS->getSubContents().begin(),
*this
);
if ( aFirstDifferent.first != _rLHS->getSubContents().end() )
return false;// the sub contents differ
}
return true;
}
};
/// base class for functors which act on a SvStream
struct StorageHelper
{
protected:
SvStream& m_rStorage;
explicit StorageHelper( SvStream& _rStorage ) : m_rStorage( _rStorage ) { }
};
struct StoreContentURL : public StorageHelper
{
uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;
StoreContentURL( SvStream& _rStorage,
uno::Reference<
util::XOfficeInstallationDirectories > xOfficeInstDirs )
: StorageHelper( _rStorage ), m_xOfficeInstDirs(std::move( xOfficeInstDirs )) { }
void operator() ( const ::rtl::Reference< TemplateContent >& _rxContent ) const
{
// use the base class operator with the local name of the content
OUString sURL = _rxContent->getURL();
// #116281# Keep office installation relocatable. Never store
// any direct references to office installation directory.
sURL = m_xOfficeInstDirs->makeRelocatableURL( sURL );
m_rStorage.WriteUniOrByteString( sURL, m_rStorage.GetStreamCharSet() );
}
};
/// functor which stores the complete content of a TemplateContent
struct StoreFolderContent : public StorageHelper
{
uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;
public:
StoreFolderContent( SvStream& _rStorage,
uno::Reference<
util::XOfficeInstallationDirectories > xOfficeInstDirs )
: StorageHelper( _rStorage ), m_xOfficeInstDirs(std::move( xOfficeInstDirs )) { }
void operator() ( const TemplateContent& _rContent ) const
{
// store the info about this content
WriteDateTime( m_rStorage, _rContent.getModDate() );
// store the info about the children
// the number
m_rStorage.WriteInt32( _rContent.size() );
// their URLs ( the local name is not enough, since URL might be not a hierarchical one, "expand:" for example )
::std::for_each(
_rContent.getSubContents().begin(),
_rContent.getSubContents().end(),
StoreContentURL( m_rStorage, m_xOfficeInstDirs )
);
// their content
::std::for_each(
_rContent.getSubContents().begin(),
_rContent.getSubContents().end(),
*this
);
}
void operator() ( const ::rtl::Reference< TemplateContent >& _rxContent ) const
{
if ( _rxContent.is() )
{
operator()( *_rxContent );
}
}
};
/// functor which reads a complete TemplateContent instance
struct ReadFolderContent : public StorageHelper
{
uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;
ReadFolderContent( SvStream& _rStorage,
uno::Reference<
util::XOfficeInstallationDirectories > xOfficeInstDirs )
: StorageHelper( _rStorage ), m_xOfficeInstDirs(std::move( xOfficeInstDirs )) { }
void operator() ( TemplateContent& _rContent ) const
{
// store the info about this content
util::DateTime aModDate;
m_rStorage >> aModDate;
_rContent.setModDate( aModDate );
// store the info about the children
// the number
sal_Int32 nChildren = 0;
m_rStorage.ReadInt32( nChildren );
TemplateFolderContent& rChildren = _rContent.getSubContents();
rChildren.resize( 0 );
rChildren.reserve( nChildren );
// initialize them with their (local) names
while ( nChildren-- )
{
OUString sURL = m_rStorage.ReadUniOrByteString(m_rStorage.GetStreamCharSet());
sURL = m_xOfficeInstDirs->makeAbsoluteURL( sURL );
rChildren.push_back( new TemplateContent( INetURLObject( sURL ) ) );
}
// their content
::std::for_each(
_rContent.getSubContents().begin(),
_rContent.getSubContents().end(),
*this
);
}
void operator() ( const ::rtl::Reference< TemplateContent >& _rxContent ) const
{
if ( _rxContent.is() )
{
operator()( *_rxContent );
}
}
};
}
//= TemplateFolderCacheImpl
class TemplateFolderCacheImpl
{
private:
TemplateFolderContent m_aPreviousState; // the current state of the template dirs (as found on the HD)
TemplateFolderContent m_aCurrentState; // the previous state of the template dirs (as found in the cache file)
std::mutex m_aMutex;
// will be lazy inited; never access directly; use getOfficeInstDirs().
uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;
std::unique_ptr<SvStream> m_pCacheStream;
bool m_bNeedsUpdate : 1;
bool m_bKnowState : 1;
bool m_bValidCurrentState : 1;
bool m_bAutoStoreState : 1;
public:
explicit TemplateFolderCacheImpl( bool _bAutoStoreState );
~TemplateFolderCacheImpl( );
bool needsUpdate();
void storeState();
private:
bool openCacheStream( bool _bForRead );
void closeCacheStream( );
/// read the state of the dirs from the cache file
bool readPreviousState();
/// read the current state of the dirs
bool readCurrentState();
static OUString implParseSmart( const OUString& _rPath );
bool implReadFolder( const ::rtl::Reference< TemplateContent >& _rxRoot );
static sal_Int32 getMagicNumber();
static void normalize( TemplateFolderContent& _rState );
// @return <TRUE/> if the states equal
static bool equalStates( const TemplateFolderContent& _rLHS, const TemplateFolderContent& _rRHS );
// late initialize m_xOfficeInstDirs
const uno::Reference< util::XOfficeInstallationDirectories >& getOfficeInstDirs();
};
TemplateFolderCacheImpl::TemplateFolderCacheImpl( bool _bAutoStoreState )
:m_bNeedsUpdate ( true )
,m_bKnowState ( false )
,m_bValidCurrentState ( false )
,m_bAutoStoreState ( _bAutoStoreState )
{
}
TemplateFolderCacheImpl::~TemplateFolderCacheImpl( )
{
// store the current state if possible and required
if ( m_bValidCurrentState && m_bAutoStoreState )
storeState();
closeCacheStream( );
}
sal_Int32 TemplateFolderCacheImpl::getMagicNumber()
{
return (sal_Int8('T') << 12)
| (sal_Int8('D') << 8)
| (sal_Int8('S') << 4)
| (sal_Int8('C'));
}
void TemplateFolderCacheImpl::normalize( TemplateFolderContent& _rState )
{
SubContentSort()( _rState );
}
bool TemplateFolderCacheImpl::equalStates( const TemplateFolderContent& _rLHS, const TemplateFolderContent& _rRHS )
{
if ( _rLHS.size() != _rRHS.size() )
return false;
// as both arrays are sorted (by definition - this is a precondition of this method)
// we can simply go from the front to the back and compare the single elements
::std::pair< ConstFolderIterator, ConstFolderIterator > aFirstDifferent = ::std::mismatch(
_rLHS.begin(),
_rLHS.end(),
_rRHS.begin(),
TemplateContentEqual()
);
return aFirstDifferent.first == _rLHS.end();
}
void TemplateFolderCacheImpl::storeState()
{
if ( !m_bValidCurrentState )
readCurrentState( );
if ( !(m_bValidCurrentState && openCacheStream( false )) )
return;
m_pCacheStream->WriteInt32( getMagicNumber() );
// store the template root folders
// the size
m_pCacheStream->WriteInt32( m_aCurrentState.size() );
// the complete URLs
::std::for_each(
m_aCurrentState.begin(),
m_aCurrentState.end(),
StoreContentURL( *m_pCacheStream, getOfficeInstDirs() )
);
// the contents
::std::for_each(
m_aCurrentState.begin(),
m_aCurrentState.end(),
StoreFolderContent( *m_pCacheStream, getOfficeInstDirs() )
);
}
OUString TemplateFolderCacheImpl::implParseSmart( const OUString& _rPath )
{
INetURLObject aParser;
aParser.SetSmartProtocol( INetProtocol::File );
aParser.SetURL( _rPath );
if ( INetProtocol::NotValid == aParser.GetProtocol() )
{
OUString sURL;
osl::FileBase::getFileURLFromSystemPath( _rPath, sURL );
aParser.SetURL( sURL );
}
return aParser.GetMainURL( INetURLObject::DecodeMechanism::ToIUri );
}
void TemplateFolderCacheImpl::closeCacheStream( )
{
m_pCacheStream.reset();
}
bool TemplateFolderCacheImpl::implReadFolder( const ::rtl::Reference< TemplateContent >& _rxRoot )
{
try
{
// create a content for the current folder root
Reference< XResultSet > xResultSet;
Sequence< OUString > aContentProperties{ u"Title"_ustr, u"DateModified"_ustr, u"DateCreated"_ustr,
u"IsFolder"_ustr };
// get the set of sub contents in the folder
try
{
Reference< XDynamicResultSet > xDynResultSet;
::ucbhelper::Content aTemplateRoot( _rxRoot->getURL(), Reference< XCommandEnvironment >(), comphelper::getProcessComponentContext() );
xDynResultSet = aTemplateRoot.createDynamicCursor( aContentProperties );
if ( xDynResultSet.is() )
xResultSet = xDynResultSet->getStaticResultSet();
}
catch( CommandAbortedException& )
{
TOOLS_WARN_EXCEPTION( "svtools.misc", "" );
return false;
}
catch( css::uno::Exception& )
{
}
// collect the infos about the sub contents
if ( xResultSet.is() )
{
Reference< XRow > xRow( xResultSet, UNO_QUERY_THROW );
Reference< XContentAccess > xContentAccess( xResultSet, UNO_QUERY_THROW );
while ( xResultSet->next() )
{
INetURLObject aSubContentURL( xContentAccess->queryContentIdentifierString() );
// a new content instance
::rtl::Reference< TemplateContent > xChild = new TemplateContent( std::move(aSubContentURL) );
// the modified date
xChild->setModDate( xRow->getTimestamp( 2 ) ); // date modified
if ( xRow->wasNull() )
xChild->setModDate( xRow->getTimestamp( 3 ) ); // fallback: date created
// push back this content
_rxRoot->push_back( xChild );
// is it a folder?
if ( xRow->getBoolean( 4 ) && !xRow->wasNull() )
{ // yes -> step down
ConstFolderIterator aNextLevelRoot = _rxRoot->end();
--aNextLevelRoot;
implReadFolder( *aNextLevelRoot );
}
}
}
}
catch( const Exception& )
{
TOOLS_WARN_EXCEPTION( "svtools", "TemplateFolderCacheImpl::implReadFolder" );
return false;
}
return true;
}
bool TemplateFolderCacheImpl::readCurrentState()
{
// reset
m_bValidCurrentState = false;
TemplateFolderContent aTemplateFolderContent;
m_aCurrentState.swap( aTemplateFolderContent );
// the template directories from the config
const SvtPathOptions aPathOptions;
const OUString& aDirs = aPathOptions.GetTemplatePath();
// loop through all the root-level template folders
sal_Int32 nIndex = 0;
do
{
OUString sTemplatePath( aDirs.getToken(0, ';', nIndex) );
sTemplatePath = aPathOptions.ExpandMacros( sTemplatePath );
// Make sure excess ".." path segments (from expanding bootstrap
// variables in paths) are normalized in the same way they are
// normalized for paths read from the .templdir.cache file (where
// paths have gone through makeRelocatable URL on writing out and
// then through makeAbsoluteURL when reading back in), as otherwise
// equalStates() in needsUpdate() could erroneously consider
// m_aCurrentState and m_aPreviousState as different:
sTemplatePath = getOfficeInstDirs()->makeAbsoluteURL(
getOfficeInstDirs()->makeRelocatableURL(sTemplatePath));
// create a new entry
m_aCurrentState.push_back( new TemplateContent( INetURLObject( sTemplatePath ) ) );
TemplateFolderContent::iterator aCurrentRoot = m_aCurrentState.end();
--aCurrentRoot;
if ( !implReadFolder( *aCurrentRoot ) )
return false;
}
while ( nIndex >= 0 );
// normalize the array (which basically means "sort it")
normalize( m_aCurrentState );
m_bValidCurrentState = true;
return m_bValidCurrentState;
}
bool TemplateFolderCacheImpl::readPreviousState()
{
DBG_ASSERT( m_pCacheStream, "TemplateFolderCacheImpl::readPreviousState: not to be called without stream!" );
// reset
TemplateFolderContent aTemplateFolderContent;
m_aPreviousState.swap( aTemplateFolderContent );
// check the magic number
sal_Int32 nMagic = 0;
m_pCacheStream->ReadInt32( nMagic );
DBG_ASSERT( getMagicNumber() == nMagic, "TemplateFolderCacheImpl::readPreviousState: invalid cache file!" );
if ( getMagicNumber() != nMagic )
return false;
// the root directories
// their number
sal_Int32 nRootDirectories = 0;
m_pCacheStream->ReadInt32( nRootDirectories );
// init empty TemplateContents with the URLs
m_aPreviousState.reserve( nRootDirectories );
while ( nRootDirectories-- )
{
OUString sURL = m_pCacheStream->ReadUniOrByteString(m_pCacheStream->GetStreamCharSet());
// #116281# Keep office installation relocatable. Never store
// any direct references to office installation directory.
sURL = getOfficeInstDirs()->makeAbsoluteURL( sURL );
m_aPreviousState.push_back(
new TemplateContent( INetURLObject(sURL) ) );
}
// read the contents of the root folders
::std::for_each(
m_aPreviousState.begin(),
m_aPreviousState.end(),
ReadFolderContent( *m_pCacheStream, getOfficeInstDirs() )
);
DBG_ASSERT( !m_pCacheStream->GetErrorCode(), "TemplateFolderCacheImpl::readPreviousState: unknown error during reading the state cache!" );
// normalize the array (which basically means "sort it")
normalize( m_aPreviousState );
return true;
}
bool TemplateFolderCacheImpl::openCacheStream( bool _bForRead )
{
// close any old stream instance
closeCacheStream( );
// get the storage directory
OUString sStorageURL = implParseSmart( SvtPathOptions().GetStoragePath() );
INetURLObject aStorageURL( sStorageURL );
if ( INetProtocol::NotValid == aStorageURL.GetProtocol() )
{
OSL_FAIL( "TemplateFolderCacheImpl::openCacheStream: invalid storage path!" );
return false;
}
// append our name
aStorageURL.Append( u".templdir.cache" );
// open the stream
m_pCacheStream = UcbStreamHelper::CreateStream( aStorageURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ),
_bForRead ? StreamMode::READ | StreamMode::NOCREATE : StreamMode::WRITE | StreamMode::TRUNC );
DBG_ASSERT( m_pCacheStream, "TemplateFolderCacheImpl::openCacheStream: could not open/create the cache stream!" );
if ( m_pCacheStream && m_pCacheStream->GetErrorCode() )
{
m_pCacheStream.reset();
}
if ( m_pCacheStream )
m_pCacheStream->SetStreamCharSet( RTL_TEXTENCODING_UTF8 );
return nullptr != m_pCacheStream;
}
bool TemplateFolderCacheImpl::needsUpdate()
{
if ( m_bKnowState )
return m_bNeedsUpdate;
m_bNeedsUpdate = true;
m_bKnowState = true;
if ( readCurrentState() )
{
// open the stream which contains the cached state of the directories
if ( openCacheStream( true ) )
{ // opening the stream succeeded
if ( readPreviousState() )
{
m_bNeedsUpdate = !equalStates( m_aPreviousState, m_aCurrentState );
}
else
{
closeCacheStream();
}
}
}
return m_bNeedsUpdate;
}
const uno::Reference< util::XOfficeInstallationDirectories >&
TemplateFolderCacheImpl::getOfficeInstDirs()
{
if ( !m_xOfficeInstDirs.is() )
{
std::lock_guard aGuard( m_aMutex );
if ( !m_xOfficeInstDirs.is() )
{
uno::Reference< uno::XComponentContext > xCtx(
comphelper::getProcessComponentContext() );
m_xOfficeInstDirs = util::theOfficeInstallationDirectories::get(xCtx);
}
}
return m_xOfficeInstDirs;
}
//= TemplateFolderCache
TemplateFolderCache::TemplateFolderCache( bool _bAutoStoreState )
:m_pImpl( new TemplateFolderCacheImpl( _bAutoStoreState ) )
{
}
TemplateFolderCache::~TemplateFolderCache( )
{
}
bool TemplateFolderCache::needsUpdate()
{
return m_pImpl->needsUpdate();
}
void TemplateFolderCache::storeState()
{
m_pImpl->storeState();
}
} // namespace sfx2
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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