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/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
#ifndef _TEMPLATE_SCANNER_HXX
#define _TEMPLATE_SCANNER_HXX
#include "tools/AsynchronousTask.hxx"
#include "sddllapi.h"
#include <ucbhelper/content.hxx>
#include <tools/string.hxx>
#include "com/sun/star/uno/Reference.hxx"
#include <vector>
#include <boost/scoped_ptr.hpp>
namespace com { namespace sun { namespace star { namespace ucb {
class XContent;
class XCommandEnvironment;
} } } }
namespace com { namespace sun { namespace star { namespace sdbc {
class XResultSet;
} } } }
namespace sd {
/** Representation of a template or layout file.
*/
class TemplateEntry
{
public:
TemplateEntry (const String& rsTitle, const String& rsPath)
: msTitle(rsTitle), msPath(rsPath) {}
String msTitle;
String msPath;
};
/** Representation of a template or layout folder.
*/
class TemplateDir
{
public:
TemplateDir (const String& rsRegion, const String& rsUrl )
: msRegion(rsRegion), msUrl(rsUrl), maEntries() {}
String msRegion;
String msUrl;
::std::vector<TemplateEntry*> maEntries;
};
/** This class scans the template folders for impress templates. There are
two ways to use this class.
1. The old and deprecated way is to call Scan() to scan all templates
and collect the supported ones in a tree structure. This structure is
returned by GetFolderList().
2. The new way implements the AsynchronousTask interface. Call
RunNextStep() as long HasNextStep() returns <TRUE/>. After every step
GetLastAddedEntry() returns the template that was scanned (and has a
supported format) last. When a step does not add a new template then
the value of the previous step is returned.
*/
class SD_DLLPUBLIC TemplateScanner
: public ::sd::tools::AsynchronousTask
{
public:
/** Create a new template scanner and prepare but do not execute the scanning.
*/
TemplateScanner (void);
/** The destructor deletes any remaining entries of the local list of
templates.
*/
virtual ~TemplateScanner (void);
/** Execute the actual scanning of templates. When this method
terminates the result can be obtained by calling the
<member>GetTemplateList</member> method.
*/
void Scan (void);
/** Return the list of template folders. It lies in the responsibility
of the caller to take ownership of some or all entries and remove
them from the returned list. All entries that remain until the
destructor is called will be destroyed.
*/
std::vector<TemplateDir*>& GetFolderList (void);
/** Implementation of the AsynchronousTask interface method.
*/
virtual void RunNextStep (void);
/** Implementation of the AsynchronousTask interface method.
*/
virtual bool HasNextStep (void);
/** Return the TemplateDir object that was last added to
mpTemplateDirectory.
@return
<NULL/> is returned either before the template scanning is
started or after it has ended.
*/
const TemplateEntry* GetLastAddedEntry (void) const;
private:
/** The current state determines which step will be executed next by
RunNextStep().
*/
enum State {
INITIALIZE_SCANNING,
INITIALIZE_FOLDER_SCANNING,
GATHER_FOLDER_LIST,
SCAN_FOLDER,
INITIALIZE_ENTRY_SCAN,
SCAN_ENTRY,
DONE,
ERROR
};
State meState;
::ucbhelper::Content maFolderContent;
TemplateDir* mpTemplateDirectory;
/** The data structure that is to be filled with information about the
template files.
*/
std::vector<TemplateDir*> maFolderList;
/** This member points into the maFolderList to the member that was most
recently added.
*/
TemplateEntry* mpLastAddedEntry;
/** The folders that are collected by GatherFolderList().
*/
class FolderDescriptorList;
::boost::scoped_ptr<FolderDescriptorList> mpFolderDescriptors;
/** Set of state variables used by the methods
InitializeFolderScanning(), GatherFolderList(), ScanFolder(),
InitializeEntryScanning(), and ScanEntry().
*/
com::sun::star::uno::Reference<com::sun::star::ucb::XContent> mxTemplateRoot;
com::sun::star::uno::Reference<com::sun::star::ucb::XCommandEnvironment> mxFolderEnvironment;
com::sun::star::uno::Reference<com::sun::star::ucb::XCommandEnvironment> mxEntryEnvironment;
com::sun::star::uno::Reference<com::sun::star::sdbc::XResultSet> mxFolderResultSet;
com::sun::star::uno::Reference<com::sun::star::sdbc::XResultSet> mxEntryResultSet;
/** Obtain the root folder of the template folder hierarchy. The result
is stored in mxTemplateRoot for later use.
*/
State GetTemplateRoot (void);
/** Initialize the scanning of folders. This is called exactly once.
@return
Returns one of the two states ERROR or GATHER_FOLDER_LIST.
*/
State InitializeFolderScanning (void);
/** Collect all available top-level folders in an ordered list which can
then be processed by ScanFolder().
@return
Returns one of the two states ERROR or SCAN_FOLDER.
*/
State GatherFolderList (void);
/** From the list of top-level folders collected by GatherFolderList()
the one with highest priority is processed.
@return
Returns one of the states ERROR, DONE, or INITILIZE_ENTRY_SCAN.
*/
State ScanFolder (void);
/** Initialize the scanning of entries of a top-level folder.
@return
Returns one of the states ERROR or SCAN_ENTRY.
*/
State InitializeEntryScanning (void);
/** Scan one entry. When this entry matches the recognized template
types it is appended to the result set.
@return
Returns one of the states ERROR, SCAN_ENTRY, or SCAN_FOLDER.
*/
State ScanEntry (void);
};
} // end of namespace sd
#endif
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