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|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "typedetection.hxx"
#include "constant.hxx"
//_______________________________________________
// includes
#include <com/sun/star/document/XExtendedFilterDetection.hpp>
#include <com/sun/star/util/XURLTransformer.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/task/XInteractionHandler.hpp>
#include <tools/wldcrd.hxx>
#include <rtl/ustrbuf.hxx>
#include <framework/interaction.hxx>
#include <tools/urlobj.hxx>
#include <unotools/localfilehelper.hxx>
//_______________________________________________
// namespace
namespace filter{
namespace config{
namespace css = ::com::sun::star;
TypeDetection::TypeDetection(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMGR)
{
BaseContainer::init(xSMGR ,
TypeDetection::impl_getImplementationName() ,
TypeDetection::impl_getSupportedServiceNames(),
FilterCache::E_TYPE );
}
TypeDetection::~TypeDetection()
{
}
::rtl::OUString SAL_CALL TypeDetection::queryTypeByURL(const ::rtl::OUString& sURL)
throw (css::uno::RuntimeException)
{
::rtl::OUString sType;
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
css::util::URL aURL;
aURL.Complete = sURL;
css::uno::Reference< css::util::XURLTransformer > xParser(m_xSMGR->createInstance(SERVICE_URLTRANSFORMER), css::uno::UNO_QUERY);
xParser->parseStrict(aURL);
// set std types as minimum requirement first!
// Only in case no type was found for given URL,
// use optional types too ...
FlatDetection lFlatTypes;
m_rCache->detectFlatForURL(aURL, lFlatTypes);
if (
(lFlatTypes.size() < 1 ) &&
(!m_rCache->isFillState(FilterCache::E_CONTAINS_TYPES))
)
{
m_rCache->load(FilterCache::E_CONTAINS_TYPES);
m_rCache->detectFlatForURL(aURL, lFlatTypes);
}
// first item is guaranteed as "preferred" one!
if (lFlatTypes.size() > 0)
{
const FlatDetectionInfo& aMatch = *(lFlatTypes.begin());
sType = aMatch.sType;
}
return sType;
// <- SAFE
}
namespace {
/**
* Rank format types in order of complexity. More complex formats are
* ranked higher so that they get tested sooner over simpler formats.
*
* Guidelines to determine how complex a format is (subject to change):
*
* 1) compressed text (XML, HTML, etc)
* 2) binary
* 3) non-compressed text
* 3.1) structured text
* 3.1.1) dialect of a structured text (e.g. docbook XML)
* 3.1.2) generic structured text (e.g. generic XML)
* 3.2) non-structured text
*
* In each category, rank them from strictly-structured to
* loosely-structured.
*/
int getFlatTypeRank(const rtl::OUString& rType)
{
// List formats from more complex to less complex.
// TODO: Add more.
static const char* ranks[] = {
// Compressed XML
"writer8_template",
"writer8",
"calc8_template",
"calc8",
"writer_OOXML_Text_Template",
"writer_OOXML",
"writer_MS_Word_2007_Template",
"writer_MS_Word_2007",
"Office Open XML Spreadsheet Template",
"Office Open XML Spreadsheet",
"MS Excel 2007 XML Template",
"MS Excel 2007 XML",
// Compressed text
"pdf_Portable_Document_Format",
// Binary
"writer_T602_Document",
"writer_WordPerfect_Document",
"writer_MS_Works_Document",
"writer_MS_Word_97_Vorlage",
"writer_MS_Word_97",
"writer_MS_Word_95_Vorlage",
"writer_MS_Word_95",
"writer_MS_WinWord_60",
"writer_MS_WinWord_5",
"MS Excel 2007 Binary",
"calc_MS_Excel_97_VorlageTemplate",
"calc_MS_Excel_97",
"calc_MS_Excel_95_VorlageTemplate",
"calc_MS_Excel_95",
"calc_MS_Excel_5095_VorlageTemplate",
"calc_MS_Excel_5095",
"calc_MS_Excel_40_VorlageTemplate",
"calc_MS_Excel_40",
"calc_Pocket_Excel_File",
"calc_Lotus",
"calc_QPro",
"calc_SYLK",
"calc_DIF",
"calc_dBase",
// Non-compressed XML
"writer_ODT_FlatXML",
"calc_ODS_FlatXML",
"calc_MS_Excel_2003_XML",
"writer_MS_Word_2003_XML",
"writer_DocBook_File",
"XHTML_File",
// Non-compressed text
"writer_Rich_Text_Format",
"generic_HTML",
"generic_Text"
};
size_t n = SAL_N_ELEMENTS(ranks);
for (size_t i = 0; i < n; ++i)
{
if (rType.equalsAscii(ranks[i]))
return n - i - 1;
}
// Not ranked. Treat them equally.
return -1;
}
/**
* Types with matching pattern first, then extension, then custom ranks by
* types, then types that are supported by the document service come next.
* Lastly, sort them alphabetically.
*/
struct SortByPriority : public std::binary_function<FlatDetectionInfo, FlatDetectionInfo, bool>
{
bool operator() (const FlatDetectionInfo& r1, const FlatDetectionInfo& r2) const
{
if (r1.bMatchByPattern != r2.bMatchByPattern)
return r1.bMatchByPattern;
if (r1.bMatchByExtension != r2.bMatchByExtension)
return r1.bMatchByExtension;
int rank1 = getFlatTypeRank(r1.sType);
int rank2 = getFlatTypeRank(r2.sType);
if (rank1 != rank2)
return rank1 > rank2;
if (r1.bPreselectedByDocumentService != r2.bPreselectedByDocumentService)
return r1.bPreselectedByDocumentService;
// All things being equal, sort them alphabetically.
return r1.sType > r2.sType;
}
};
struct EqualByName : public std::binary_function<FlatDetectionInfo, FlatDetectionInfo, bool>
{
bool operator() (const FlatDetectionInfo& r1, const FlatDetectionInfo& r2) const
{
return r1.sType == r2.sType;
}
};
}
::rtl::OUString SAL_CALL TypeDetection::queryTypeByDescriptor(css::uno::Sequence< css::beans::PropertyValue >& lDescriptor,
sal_Bool bAllowDeep )
throw (css::uno::RuntimeException)
{
// make the descriptor more useable :-)
::comphelper::MediaDescriptor stlDescriptor(lDescriptor);
// SAFE -> ----------------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
//*******************************************
// parse given URL to split it into e.g. main and jump marks ...
::rtl::OUString sURL = stlDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_URL(), ::rtl::OUString());
#if OSL_DEBUG_LEVEL > 0
if (stlDescriptor.find(::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "FileName" ))) != stlDescriptor.end())
OSL_FAIL("Detect using of deprecated and already unsupported MediaDescriptor property \"FileName\"!");
#endif
css::util::URL aURL;
aURL.Complete = sURL;
css::uno::Reference< css::util::XURLTransformer > xParser(m_xSMGR->createInstance(SERVICE_URLTRANSFORMER), css::uno::UNO_QUERY);
xParser->parseStrict(aURL);
rtl::OUString aSelectedFilter = stlDescriptor.getUnpackedValueOrDefault(
comphelper::MediaDescriptor::PROP_FILTERNAME(), rtl::OUString());
if (!aSelectedFilter.isEmpty())
{
// Caller specified the filter type. Honor it. Just get the default
// type for that filter, and bail out.
if (impl_validateAndSetFilterOnDescriptor(stlDescriptor, aSelectedFilter))
return stlDescriptor[comphelper::MediaDescriptor::PROP_TYPENAME()].get<rtl::OUString>();
}
// preselected type or document service? use it as first "flat" detected
// type later!
FlatDetection lFlatTypes;
impl_getPreselection(aURL, stlDescriptor, lFlatTypes);
//*******************************************
// get all types, which match to the given descriptor
// That can be true by: extensions/url pattern/mime type etcpp.
m_rCache->detectFlatForURL(aURL, lFlatTypes);
aLock.clear();
// <- SAFE ----------------------------------
// Properly prioritize all candidate types.
lFlatTypes.sort(SortByPriority());
lFlatTypes.unique(EqualByName());
::rtl::OUString sType ;
::rtl::OUString sLastChance;
try
{
//*******************************************
// verify every flat detected (or preselected!) type
// by calling its registered deep detection service.
// But break this loop if a type match to the given descriptor
// by an URL pattern(!) or if deep detection isnt allowed from
// outside (bAllowDeep=sal_False) or break the whole detection by
// throwing an exception if creation of the might needed input
// stream failed by e.g. an IO exception ...
OUStringList lUsedDetectors;
if (lFlatTypes.size()>0)
sType = impl_detectTypeFlatAndDeep(stlDescriptor, lFlatTypes, bAllowDeep, lUsedDetectors, sLastChance);
//*******************************************
// if no flat detected (nor preselected!) type could be
// verified and no error occurred during creation of
// the might needed input stream, start detection
// which uses all registered deep detection services.
if (
(sType.isEmpty()) &&
(bAllowDeep )
)
{
sType = impl_detectTypeDeepOnly(stlDescriptor, lUsedDetectors);
}
//*******************************************
// flat detection failed
// pure deep detection failed
// => ask might existing InteractionHandler
// means: ask user for it's decision
if (sType.isEmpty())
sType = impl_askUserForTypeAndFilterIfAllowed(stlDescriptor);
//*******************************************
// no real detected type - but a might valid one.
// update descriptor and set last chance for return.
if (sType.isEmpty() && !sLastChance.isEmpty())
{
OSL_FAIL("set first flat detected type without a registered deep detection service as \"last chance\" ... nevertheless some other deep detections said \"NO\". I TRY IT!");
sType = sLastChance;
}
}
catch(const css::uno::RuntimeException&)
{ throw; }
catch(const css::uno::Exception&)
{ sType = ::rtl::OUString(); }
//*******************************************
// adapt media descriptor, so it contains the right values
// for type/filter name/document service/ etcpp.
impl_checkResultsAndAddBestFilter(stlDescriptor, sType); // Attention: sType is used as IN/OUT param here and will might be changed inside this method !!!
impl_validateAndSetTypeOnDescriptor(stlDescriptor, sType);
stlDescriptor >> lDescriptor;
return sType;
}
void TypeDetection::impl_checkResultsAndAddBestFilter(::comphelper::MediaDescriptor& rDescriptor,
::rtl::OUString& sType )
{
// a)
// Dont overwrite a might preselected filter!
::rtl::OUString sFilter = rDescriptor.getUnpackedValueOrDefault(
::comphelper::MediaDescriptor::PROP_FILTERNAME(),
::rtl::OUString());
if (!sFilter.isEmpty())
return;
// b)
// check a preselected document service too.
// Then we have to search a suitable filter witin this module.
::rtl::OUString sDocumentService = rDescriptor.getUnpackedValueOrDefault(
::comphelper::MediaDescriptor::PROP_DOCUMENTSERVICE(),
::rtl::OUString());
if (!sDocumentService.isEmpty())
{
try
{
::rtl::OUString sRealType = sType;
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
// Attention: For executing next lines of code, We must be shure that
// all filters already loaded :-(
// That can disturb our "load on demand feature". But we have no other chance!
m_rCache->load(FilterCache::E_CONTAINS_FILTERS);
CacheItem lIProps;
lIProps[PROPNAME_DOCUMENTSERVICE] <<= sDocumentService;
lIProps[PROPNAME_TYPE ] <<= sRealType;
OUStringList lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);
aLock.clear();
// <- SAFE
for (OUStringList::const_iterator pIt = lFilters.begin();
pIt != lFilters.end(); ++pIt)
{
// SAFE ->
aLock.reset();
try
{
CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, *pIt);
sal_Int32 nFlags = 0;
aFilter[PROPNAME_FLAGS] >>= nFlags;
if ((nFlags & FLAGVAL_IMPORT) == FLAGVAL_IMPORT)
sFilter = *pIt;
if ((nFlags & FLAGVAL_PREFERRED) == FLAGVAL_PREFERRED)
break;
}
catch(const css::uno::Exception&) {}
aLock.clear();
// <- SAFE
}
if (!sFilter.isEmpty())
{
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME() ] <<= sRealType;
rDescriptor[::comphelper::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
sType = sRealType;
return;
}
}
catch(const css::uno::Exception&)
{}
}
// c)
// We can use the preferred filter for the specified type.
// Such preferred filter points:
// - to the default filter of the preferred application
// - or to any other filter if no preferred filter was set.
// Note: It's an optimization only!
// It's not guaranteed, that such preferred filter exists.
sFilter = ::rtl::OUString();
try
{
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
aType[PROPNAME_PREFERREDFILTER] >>= sFilter;
CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
aLock.clear();
// <- SAFE
// no exception => found valid type and filter => set it on the given descriptor
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME() ] <<= sType ;
rDescriptor[::comphelper::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
return;
}
catch(const css::uno::Exception&)
{}
// d)
// Search for any import(!) filter, which is registered for this type.
sFilter = ::rtl::OUString();
try
{
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
// Attention: For executing next lines of code, We must be shure that
// all filters already loaded :-(
// That can disturb our "load on demand feature". But we have no other chance!
m_rCache->load(FilterCache::E_CONTAINS_FILTERS);
CacheItem lIProps;
lIProps[PROPNAME_TYPE] <<= sType;
OUStringList lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);
aLock.clear();
// <- SAFE
OUStringList::const_iterator pIt;
for ( pIt = lFilters.begin();
pIt != lFilters.end() ;
++pIt )
{
sFilter = *pIt;
// SAFE ->
aLock.reset();
try
{
CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
sal_Int32 nFlags = 0;
aFilter[PROPNAME_FLAGS] >>= nFlags;
if ((nFlags & FLAGVAL_IMPORT) == FLAGVAL_IMPORT)
break;
}
catch(const css::uno::Exception&)
{ continue; }
aLock.clear();
// <- SAFE
sFilter = ::rtl::OUString();
}
if (!sFilter.isEmpty())
{
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME() ] <<= sType ;
rDescriptor[::comphelper::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
return;
}
}
catch(const css::uno::Exception&)
{}
}
sal_Bool TypeDetection::impl_getPreselectionForType(const ::rtl::OUString& sPreSelType,
const css::util::URL& aParsedURL ,
FlatDetection& rFlatTypes )
{
// Can be used to supress execution of some parts of this method
// if its already clear that detected type is valid or not.
// Its neccessary to use shared code at the end, which update
// all return parameters constistency!
sal_Bool bBreakDetection = sal_False;
// Further we must know if it matches by pattern
// Every flat detected type by pattern wont be detected deep!
sal_Bool bMatchByPattern = sal_False;
// And we must know if a preselection must be preferred, because
// it matches by it's extension too.
sal_Bool bMatchByExtension = sal_False;
// If we e.g. collect all filters of a factory (be a forced factory preselection)
// we should preferr all filters of this factory, where the type match the given URL.
// All other types (which sorrespond to filters of the same factory - but dont match
// the URL) should be "used later" for detection and sorted at the end of our return vector
// rFlatTypes!
// => bPreferredPreselection = (matchByExtension || matchByURLPattern)
sal_Bool bPreferredPreselection = sal_False;
// validate type
::rtl::OUString sType(sPreSelType);
CacheItem aType;
try
{
// SAFE -> --------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
aLock.clear();
// <- SAFE --------------------------
}
catch(const css::container::NoSuchElementException&)
{
sType = ::rtl::OUString();
bBreakDetection = sal_True;
}
if (!bBreakDetection)
{
// We cant check a preselected type for a given stream!
// So we must believe, that it can work ...
if ( aParsedURL.Complete == "private:stream" )
bBreakDetection = sal_True;
}
if (!bBreakDetection)
{
// extract extension from URL .. to check it case-insensitive !
INetURLObject aParser (aParsedURL.Main);
::rtl::OUString sExtension = aParser.getExtension(INetURLObject::LAST_SEGMENT ,
sal_True ,
INetURLObject::DECODE_WITH_CHARSET);
sExtension = sExtension.toAsciiLowerCase();
// otherwhise we must know, if it matches to the given URL realy.
// especialy if it matches by its extension or pattern registration.
OUStringList lExtensions(aType[PROPNAME_EXTENSIONS]);
OUStringList lURLPattern(aType[PROPNAME_URLPATTERN]);
for (OUStringList::const_iterator pIt = lExtensions.begin();
pIt != lExtensions.end() ;
++pIt )
{
::rtl::OUString sCheckExtension(pIt->toAsciiLowerCase());
if (sCheckExtension.equals(sExtension))
{
bBreakDetection = sal_True;
bMatchByExtension = sal_True;
bPreferredPreselection = sal_True;
break;
}
}
if (!bBreakDetection)
{
for (OUStringList::const_iterator pIt = lURLPattern.begin();
pIt != lURLPattern.end() ;
++pIt )
{
WildCard aCheck(*pIt);
if (aCheck.Matches(aParsedURL.Main))
{
bBreakDetection = sal_True;
bMatchByPattern = sal_True;
bPreferredPreselection = sal_True;
break;
}
}
}
}
// if its a valid type - set it on all return values!
if (!sType.isEmpty())
{
FlatDetectionInfo aInfo;
aInfo.sType = sType;
aInfo.bMatchByExtension = bMatchByExtension;
aInfo.bMatchByPattern = bMatchByPattern;
if (bPreferredPreselection)
rFlatTypes.push_front(aInfo);
else
rFlatTypes.push_back(aInfo);
return sal_True;
}
// not valid!
return sal_False;
}
sal_Bool TypeDetection::impl_getPreselectionForFilter(const ::rtl::OUString& sPreSelFilter,
const css::util::URL& aParsedURL ,
FlatDetection& rFlatTypes )
{
// Can be used to supress execution of some parts of this method
// if its already clear that detected filter is valid or not.
// Its neccessary to use shared code at the end, which update
// all return parameters constistency!
sal_Bool bBreakDetection = sal_False;
// validate filter
::rtl::OUString sFilter(sPreSelFilter);
CacheItem aFilter;
try
{
// SAFE -> --------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
aLock.clear();
// <- SAFE --------------------------
}
catch(const css::container::NoSuchElementException&)
{
sFilter = ::rtl::OUString();
bBreakDetection = sal_True;
}
if (!bBreakDetection)
{
// get its type and check if it matches the given URL
::rtl::OUString sType;
aFilter[PROPNAME_TYPE] >>= sType;
bBreakDetection = impl_getPreselectionForType(sType, aParsedURL, rFlatTypes);
// not a valid type? -> not a valid filter!
if (!bBreakDetection)
sFilter = ::rtl::OUString();
}
if (!sFilter.isEmpty())
return sal_True;
else
return sal_False;
}
sal_Bool TypeDetection::impl_getPreselectionForDocumentService(const ::rtl::OUString& sPreSelDocumentService,
const css::util::URL& aParsedURL ,
FlatDetection& rFlatTypes )
{
// get all filters, which match to this doc service
OUStringList lFilters;
try
{
// SAFE -> --------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
// Attention: For executing next lines of code, We must be shure that
// all filters already loaded :-(
// That can disturb our "load on demand feature". But we have no other chance!
m_rCache->load(FilterCache::E_CONTAINS_FILTERS);
CacheItem lIProps;
lIProps[PROPNAME_DOCUMENTSERVICE] <<= sPreSelDocumentService;
lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);
aLock.clear();
// <- SAFE --------------------------
}
catch(const css::container::NoSuchElementException&)
{
lFilters.clear();
}
// step over all filters, and check if its registered type
// match the given URL.
// But use temp. list of "preselected types" instead of incoming rFlatTypes list!
// The reason behind: we must filter the getted results. And copying of stl entries
// is an easier job then removing it .-)
FlatDetection lPreselections;
for (OUStringList::const_iterator pFilter = lFilters.begin();
pFilter != lFilters.end() ;
++pFilter )
{
const ::rtl::OUString sFilter = *pFilter;
impl_getPreselectionForFilter(sFilter, aParsedURL, lPreselections);
}
// We have to mark all retrieved preselection items as "preselected by document service".
// Further we must ignore all preselected items, which does not match the URL!
FlatDetection::iterator pIt;
for ( pIt = lPreselections.begin();
pIt != lPreselections.end() ;
++pIt )
{
FlatDetectionInfo& rInfo = *pIt;
rInfo.bPreselectedByDocumentService = sal_True ;
rFlatTypes.push_back(rInfo);
}
return sal_True;
}
void TypeDetection::impl_getPreselection(const css::util::URL& aParsedURL ,
::comphelper::MediaDescriptor& rDescriptor,
FlatDetection& rFlatTypes )
{
// done to be shure, that only valid results leave this function!
rFlatTypes.clear();
/* #i55122#
Sometimes we must detect files without or with real unknown extensions.
If it does not work /which can happen of course .-)/, the user tried to preselect
the right format. But some special dialogs (e.g. "Insert->Sheet From File")
add it's own preselection too.
So we have a combination of preselected values ...
The we should preferr the most important one - set by the user.
And the user normaly preselects a filter or type. The preslected
document service cames from the dialog.
Further it doesnt matter if the user preselected a filter or a document service.
A filter selection is always more explicit then a document service selection.
So it must be pereferred. An order between type and filter selection cant be discussed .-)
*/
::rtl::OUString sSelectedType = rDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_TYPENAME(), ::rtl::OUString());
if (!sSelectedType.isEmpty())
impl_getPreselectionForType(sSelectedType, aParsedURL, rFlatTypes);
::rtl::OUString sSelectedDoc = rDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_DOCUMENTSERVICE(), ::rtl::OUString());
if (!sSelectedDoc.isEmpty())
impl_getPreselectionForDocumentService(sSelectedDoc, aParsedURL, rFlatTypes);
}
::rtl::OUString TypeDetection::impl_detectTypeFlatAndDeep( ::comphelper::MediaDescriptor& rDescriptor ,
const FlatDetection& lFlatTypes ,
sal_Bool bAllowDeep ,
OUStringList& rUsedDetectors,
::rtl::OUString& rLastChance )
{
// reset it everytimes, so the outside code can distinguish between
// a set and a not set value.
rLastChance = ::rtl::OUString();
rUsedDetectors.clear();
// step over all possible types for this URL.
// solutions:
// a) no types => no detection
// b) deep detection not allowed => return first valid type of list (because its the preferred or the first valid one)
// or(!) match by URLPattern => in such case a deep detection will be supressed!
// c) type has no detect service => safe the first occurred type without a detect service
// as "last chance"(!). It will be used outside of this method
// if no further type could be detected.
// It must be the first one, because it can be a preferred type.
// Our types list was sorted by such criteria!
// d) detect service return a valid result => return its decision
// e) detect service return an invalid result
// or any needed information could not be
// getted from the cache => ignore it, and continue with search
for (FlatDetection::const_iterator pFlatIt = lFlatTypes.begin();
pFlatIt != lFlatTypes.end() ;
++pFlatIt )
{
const FlatDetectionInfo& aFlatTypeInfo = *pFlatIt;
::rtl::OUString sFlatType = aFlatTypeInfo.sType;
if (!impl_validateAndSetTypeOnDescriptor(rDescriptor, sFlatType))
continue;
// b)
if (
(!bAllowDeep ) ||
(aFlatTypeInfo.bMatchByPattern)
)
{
return sFlatType;
}
try
{
// SAFE -> ----------------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sFlatType);
aLock.clear();
::rtl::OUString sDetectService;
aType[PROPNAME_DETECTSERVICE] >>= sDetectService;
// c)
if (sDetectService.isEmpty())
{
// flat detected types without any registered deep detection service and not
// preselected by the user can be used as LAST CHANCE in case no other type could
// be detected. Of course only the first type without deep detector can be used.
// Further ones has to be ignored.
if (rLastChance.isEmpty())
rLastChance = sFlatType;
continue;
}
// dont forget to add every real asked deep detection service here.
// Such detectors will be ignored if may be "impl_detectTypeDeepOnly()"
// must be called later!
rUsedDetectors.push_back(sDetectService);
::rtl::OUString sDeepType = impl_askDetectService(sDetectService, rDescriptor);
// d)
if (!sDeepType.isEmpty())
return sDeepType;
}
catch(const css::container::NoSuchElementException&)
{}
// e)
}
return ::rtl::OUString();
// <- SAFE ----------------------------------
}
//TO-DO: add a priority entry to filter config, e.g. defaulting to 50 and
//flag externally that some filters are lower e.g. 25 and are catch-alls
//to be tried last. Split up writer/calc/etc. filter detection to standalone
//those problematic formats
namespace
{
bool sort_catchalls_to_end(const rtl::OUString& rA, const rtl::OUString& rB)
{
if (rA == rB)
return false;
if ( rA == "com.sun.star.text.FormatDetector" )
return false;
if ( rB == "com.sun.star.text.FormatDetector" )
return true;
return rA < rB;
}
}
::rtl::OUString TypeDetection::impl_detectTypeDeepOnly( ::comphelper::MediaDescriptor& rDescriptor ,
const OUStringList& lOutsideUsedDetectors)
{
// We must know if a detect service was already used:
// i) in a combined flat/deep detection scenario outside or
// ii) in this method for a deep detection only.
// Reason: Such deep detection services work differently in these two modes!
OUStringList lInsideUsedDetectors;
OUStringList::const_iterator pIt;
// a)
// The list of "already used detect services" correspond to the list
// of preselected or flat detected types. But these detect services was called
// to check these types explicitly and return black/white ... yes/no only.
// Now they are called to return any possible result. But we should preferr
// these already used detect services against all other ones!
for ( pIt = lOutsideUsedDetectors.begin();
pIt != lOutsideUsedDetectors.end() ;
++pIt )
{
const ::rtl::OUString& sDetectService = *pIt;
::rtl::OUString sDeepType = impl_askDetectService(sDetectService, rDescriptor);
if (!sDeepType.isEmpty())
return sDeepType;
lInsideUsedDetectors.push_back(sDetectService);
}
// SAFE -> ----------------------------------
::osl::ResettableMutexGuard aLock(m_aLock);
OUStringList lDetectors = m_rCache->getItemNames(FilterCache::E_DETECTSERVICE);
std::sort(lDetectors.begin(), lDetectors.end(), sort_catchalls_to_end);
aLock.clear();
// <- SAFE ----------------------------------
// b)
// Sometimes it would be nice to ask a special set of detect services before
// any other detect service is asked. E.g. by using a preselection of a DocumentService.
// That's needed to prevent us from asking the "wrong application module" and
// opening the files into the "wrong application".
::rtl::OUString sPreselDocumentService = rDescriptor.getUnpackedValueOrDefault(
::comphelper::MediaDescriptor::PROP_DOCUMENTSERVICE(),
::rtl::OUString());
if (!sPreselDocumentService.isEmpty())
{
for ( pIt = lDetectors.begin();
pIt != lDetectors.end() ;
++pIt )
{
const ::rtl::OUString& sDetectService = *pIt;
OUStringList::const_iterator pAlreadyUsed = ::std::find(lInsideUsedDetectors.begin(), lInsideUsedDetectors.end(), sDetectService);
if (pAlreadyUsed != lInsideUsedDetectors.end())
continue;
// SAFE -> --------------------------------------------------------
aLock.reset();
CacheItem lIProps;
lIProps[PROPNAME_DETECTSERVICE] <<= sDetectService;
OUStringList lTypes = m_rCache->getMatchingItemsByProps(FilterCache::E_TYPE, lIProps);
aLock.clear();
// <- SAFE --------------------------------------------------------
sal_Bool bMatchDetectorToDocumentService = sal_False;
OUStringList::const_iterator pIt2;
for ( pIt2 = lTypes.begin();
pIt2 != lTypes.end() ;
++pIt2 )
{
const ::rtl::OUString& sType = *pIt2;
try
{
// SAFE -> ----------------------------------------------------
aLock.reset();
CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
::rtl::OUString sFilter;
aType[PROPNAME_PREFERREDFILTER] >>= sFilter;
CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
::rtl::OUString sCheckDocumentService;
aFilter[PROPNAME_DOCUMENTSERVICE] >>= sCheckDocumentService;
aLock.clear();
// <- SAFE
if (sCheckDocumentService.equals(sPreselDocumentService))
{
bMatchDetectorToDocumentService = sal_True;
break;
}
}
catch(const css::uno::Exception&)
{ continue; }
}
if (bMatchDetectorToDocumentService)
{
::rtl::OUString sDeepType = impl_askDetectService(sDetectService, rDescriptor);
if (!sDeepType.isEmpty())
return sDeepType;
lInsideUsedDetectors.push_back(sDetectService);
}
}
}
// c)
// Last chance. No "used detectors", no "preselected detectors" ... ask any existing detect services
// for this till know unknown format.
for ( pIt = lDetectors.begin();
pIt != lDetectors.end() ;
++pIt )
{
const ::rtl::OUString& sDetectService = *pIt;
OUStringList::const_iterator pAlreadyUsed = ::std::find(lInsideUsedDetectors.begin(), lInsideUsedDetectors.end(), sDetectService);
if (pAlreadyUsed != lInsideUsedDetectors.end())
continue;
::rtl::OUString sDeepType = impl_askDetectService(sDetectService, rDescriptor);
if (!sDeepType.isEmpty())
return sDeepType;
}
return ::rtl::OUString();
}
void TypeDetection::impl_seekStreamToZero(comphelper::MediaDescriptor& rDescriptor)
{
// try to seek to 0 ...
// But because XSeekable is an optional interface ... try it only .-)
css::uno::Reference< css::io::XInputStream > xStream = rDescriptor.getUnpackedValueOrDefault(
::comphelper::MediaDescriptor::PROP_INPUTSTREAM(),
css::uno::Reference< css::io::XInputStream >());
css::uno::Reference< css::io::XSeekable > xSeek(xStream, css::uno::UNO_QUERY);
if (xSeek.is())
{
try
{
xSeek->seek(0);
}
catch(const css::uno::RuntimeException&)
{
throw;
}
catch(const css::uno::Exception&)
{
}
}
}
::rtl::OUString TypeDetection::impl_askDetectService(const ::rtl::OUString& sDetectService,
::comphelper::MediaDescriptor& rDescriptor )
{
// Open the stream and add it to the media descriptor if this method is called for the first time.
// All following requests to this method will detect, that there already exists a stream .-)
// Attention: This method throws an exception if the stream could not be opened.
// It's important to break any further detection in such case.
// Catch it on the highest detection level only !!!
impl_openStream(rDescriptor);
// seek to 0 is an optional feature to be more robust against
// "simple implemented detect services" .-)
impl_seekStreamToZero(rDescriptor);
css::uno::Reference< css::document::XExtendedFilterDetection > xDetector;
css::uno::Reference< css::lang::XMultiServiceFactory > xSMGR;
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
xSMGR = m_xSMGR;
aLock.clear();
// <- SAFE
try
{
// Attention! If e.g. an office module was not installed sometimes we
// find a registered detect service, which is referred inside the
// configuration ... but not realy installed. On the other side we use
// third party components here, which can make trouble anyway. So we
// should handle errors during creation of such services more
// gracefully .-)
xDetector = css::uno::Reference< css::document::XExtendedFilterDetection >(
xSMGR->createInstance(sDetectService),
css::uno::UNO_QUERY_THROW);
}
catch (...)
{
}
if ( ! xDetector.is())
return ::rtl::OUString();
::rtl::OUString sDeepType;
try
{
// start deep detection
// Dont forget to convert stl descriptor to its uno representation.
/* Attention!
You have to use an explicit instance of this uno sequence ...
Because its used as an in out parameter. And in case of a temp. used object
we will run into memory corruptions!
*/
css::uno::Sequence< css::beans::PropertyValue > lDescriptor;
rDescriptor >> lDescriptor;
sDeepType = xDetector->detect(lDescriptor);
rDescriptor << lDescriptor;
}
catch(const css::uno::Exception&)
{
// We should ignore errors here.
// Thrown exceptions mostly will end in crash recovery ...
// But might be we find another deep detection service which can detect the same
// document without a problem .-)
sDeepType = ::rtl::OUString();
}
// seek to 0 is an optional feature to be more robust against
// "simple implemented detect services" .-)
impl_seekStreamToZero(rDescriptor);
// analyze the results
// a) detect service returns "" => return "" too and remove TYPE/FILTER prop from descriptor
// b) returned type is unknown => return "" too and remove TYPE/FILTER prop from descriptor
// c) returned type is valid => check TYPE/FILTER props inside descriptor and return the type
// this special helper checks for a valid type
// and set right values on the descriptor!
sal_Bool bValidType = impl_validateAndSetTypeOnDescriptor(rDescriptor, sDeepType);
if (bValidType)
return sDeepType;
return ::rtl::OUString();
}
::rtl::OUString TypeDetection::impl_askUserForTypeAndFilterIfAllowed(::comphelper::MediaDescriptor& rDescriptor)
{
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
css::uno::Reference< css::lang::XMultiServiceFactory > xSMGR = m_xSMGR;
aLock.clear();
// <- SAFE
css::uno::Reference< css::task::XInteractionHandler > xInteraction =
rDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_INTERACTIONHANDLER(),
css::uno::Reference< css::task::XInteractionHandler >());
if (!xInteraction.is())
return ::rtl::OUString();
::rtl::OUString sURL =
rDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_URL(),
::rtl::OUString());
css::uno::Reference< css::io::XInputStream > xStream =
rDescriptor.getUnpackedValueOrDefault(::comphelper::MediaDescriptor::PROP_INPUTSTREAM(),
css::uno::Reference< css::io::XInputStream >());
// Dont distrub the user for "non existing files - means empty URLs" or
// if we was forced to detect a stream.
// Reason behind: We must be shure to ask user for "unknown contents" only ...
// and not for "missing files". Especialy if detection is done by a stream only
// we cant check if the stream points to an "existing content"!
if (
(sURL.isEmpty() ) || // "non existing file" ?
(!xStream.is() ) || // non existing file !
(sURL.equalsIgnoreAsciiCaseAsciiL(RTL_CONSTASCII_STRINGPARAM("private:stream"))) // not a good idea .-)
)
return ::rtl::OUString();
try
{
// create a new request to ask user for it's decision about the usable filter
::framework::RequestFilterSelect aRequest(sURL);
xInteraction->handle(aRequest.GetRequest());
// "Cancel" pressed? => return with error
if (aRequest.isAbort())
return ::rtl::OUString();
// "OK" pressed => verify the selected filter, get it's coressponding
// type and return it. (BTW: We must update the media descriptor here ...)
// The user selected explicitly a filter ... but normaly we are interested on
// a type here only. But we must be shure, that the selected filter is used
// too and no ambigous filter registration disturb us .-)
::rtl::OUString sFilter = aRequest.getFilter();
if (!impl_validateAndSetFilterOnDescriptor(rDescriptor, sFilter))
return ::rtl::OUString();
::rtl::OUString sType;
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME()] >>= sType;
return sType;
}
catch(const css::uno::Exception&)
{}
return ::rtl::OUString();
}
void TypeDetection::impl_openStream(::comphelper::MediaDescriptor& rDescriptor)
throw (css::uno::Exception)
{
sal_Bool bSuccess = sal_False;
::rtl::OUString sURL = rDescriptor.getUnpackedValueOrDefault( ::comphelper::MediaDescriptor::PROP_URL(), ::rtl::OUString() );
sal_Bool bRequestedReadOnly = rDescriptor.getUnpackedValueOrDefault( ::comphelper::MediaDescriptor::PROP_READONLY(), sal_False );
if ( !sURL.isEmpty() && ::utl::LocalFileHelper::IsLocalFile( INetURLObject( sURL ).GetMainURL( INetURLObject::NO_DECODE ) ) )
{
// OOo uses own file locking mechanics in case of local file
bSuccess = rDescriptor.addInputStreamOwnLock();
}
else
bSuccess = rDescriptor.addInputStream();
if ( !bSuccess )
throw css::uno::Exception(_FILTER_CONFIG_FROM_ASCII_("Could not open stream."), static_cast< css::document::XTypeDetection* >(this));
if ( !bRequestedReadOnly )
{
// The MediaDescriptor implementation adds ReadOnly argument if the file can not be opened for writing
// this argument should be either removed or an additional argument should be added so that application
// can separate the case when the user explicitly requests readonly document.
// The current solution is to remove it here.
rDescriptor.erase( ::comphelper::MediaDescriptor::PROP_READONLY() );
}
}
void TypeDetection::impl_removeTypeFilterFromDescriptor(::comphelper::MediaDescriptor& rDescriptor)
{
::comphelper::MediaDescriptor::iterator pItType = rDescriptor.find(::comphelper::MediaDescriptor::PROP_TYPENAME() );
::comphelper::MediaDescriptor::iterator pItFilter = rDescriptor.find(::comphelper::MediaDescriptor::PROP_FILTERNAME());
if (pItType != rDescriptor.end())
rDescriptor.erase(pItType);
if (pItFilter != rDescriptor.end())
rDescriptor.erase(pItFilter);
}
sal_Bool TypeDetection::impl_validateAndSetTypeOnDescriptor( ::comphelper::MediaDescriptor& rDescriptor,
const ::rtl::OUString& sType )
{
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
if (m_rCache->hasItem(FilterCache::E_TYPE, sType))
{
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME()] <<= sType;
return sal_True;
}
aLock.clear();
// <- SAFE
// remove all related informations from the descriptor
impl_removeTypeFilterFromDescriptor(rDescriptor);
return sal_False;
}
sal_Bool TypeDetection::impl_validateAndSetFilterOnDescriptor( ::comphelper::MediaDescriptor& rDescriptor,
const ::rtl::OUString& sFilter )
{
try
{
// SAFE ->
::osl::ResettableMutexGuard aLock(m_aLock);
CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
::rtl::OUString sType;
aFilter[PROPNAME_TYPE] >>= sType;
CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
aLock.clear();
// <- SAFE
// found valid type and filter => set it on the given descriptor
rDescriptor[::comphelper::MediaDescriptor::PROP_TYPENAME() ] <<= sType ;
rDescriptor[::comphelper::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
return sal_True;
}
catch(const css::container::NoSuchElementException&){}
// remove all related informations from the descriptor
impl_removeTypeFilterFromDescriptor(rDescriptor);
return sal_False;
}
::rtl::OUString TypeDetection::impl_getImplementationName()
{
return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.comp.filter.config.TypeDetection" ));
}
css::uno::Sequence< ::rtl::OUString > TypeDetection::impl_getSupportedServiceNames()
{
css::uno::Sequence< ::rtl::OUString > lServiceNames(1);
lServiceNames[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.document.TypeDetection" ));
return lServiceNames;
}
css::uno::Reference< css::uno::XInterface > SAL_CALL TypeDetection::impl_createInstance(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMGR)
{
TypeDetection* pNew = new TypeDetection(xSMGR);
return css::uno::Reference< css::uno::XInterface >(static_cast< css::document::XTypeDetection* >(pNew), css::uno::UNO_QUERY);
}
} // namespace config
} // namespace filter
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