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/*
Generic XML Transformation Filter Processing class.
-------------------
Copyright:
(C) 2005 by Gary Cramblitt <garycramblitt@comcast.net>
-------------------
Original author: Gary Cramblitt <garycramblitt@comcast.net>
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.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
******************************************************************************/
#ifndef _XMLTRANSFORMERPROC_H_
#define _XMLTRANSFORMERPROC_H_
// TQt includes.
#include <tqobject.h>
#include <tqstringlist.h>
// KTTS includes.
#include "filterproc.h"
class TDEProcess;
class XmlTransformerProc : virtual public KttsFilterProc
{
TQ_OBJECT
public:
/**
* Constructor.
*/
XmlTransformerProc( TQObject *parent, const char *name, const TQStringList &args = TQStringList() );
/**
* Destructor.
*/
virtual ~XmlTransformerProc();
/**
* Initialize the filter.
* @param config Settings object.
* @param configGroup Settings Group.
* @return False if filter is not ready to filter.
*
* Note: The parameters are for reading from kttsdrc file. Plugins may wish to maintain
* separate configuration files of their own.
*/
virtual bool init(TDEConfig *config, const TQString &configGroup);
/**
* Returns True if the plugin supports asynchronous processing,
* i.e., supports asyncConvert method.
* @return True if this plugin supports asynchronous processing.
*
* If the plugin returns True, it must also implement @ref getState .
* It must also emit @ref filteringFinished when filtering is completed.
* If the plugin returns True, it must also implement @ref stopFiltering .
* It must also emit @ref filteringStopped when filtering has been stopped.
*/
virtual bool supportsAsync();
/**
* Convert input, returning output.
* @param inputText Input text.
* @param talkerCode TalkerCode structure for the talker that KTTSD intends to
* use for synthing the text. Useful for extracting hints about
* how to filter the text. For example, languageCode.
* @param appId The DCOP appId of the application that queued the text.
* Also useful for hints about how to do the filtering.
*/
virtual TQString convert(const TQString& inputText, TalkerCode* talkerCode, const TQCString& appId);
/**
* Convert input. Runs asynchronously.
* @param inputText Input text.
* @param talkerCode TalkerCode structure for the talker that KTTSD intends to
* use for synthing the text. Useful for extracting hints about
* how to filter the text. For example, languageCode.
* @param appId The DCOP appId of the application that queued the text.
* Also useful for hints about how to do the filtering.
* @return False if the filter cannot perform the conversion.
*
* When conversion is completed, emits signal @ref filteringFinished. Calling
* program may then call @ref getOutput to retrieve converted text. Calling
* program must call @ref ackFinished to acknowledge the conversion.
*/
virtual bool asyncConvert(const TQString& inputText, TalkerCode* talkerCode, const TQCString& appId);
/**
* Waits for a previous call to asyncConvert to finish.
*/
virtual void waitForFinished();
/**
* Returns the state of the Filter.
*/
virtual int getState();
/**
* Returns the filtered output.
*/
virtual TQString getOutput();
/**
* Acknowledges the finished filtering.
*/
virtual void ackFinished();
/**
* Stops filtering. The filteringStopped signal will emit when filtering
* has in fact stopped and state returns to fsIdle;
*/
virtual void stopFiltering();
/**
* Did this filter do anything? If the filter returns the input as output
* unmolested, it should return False when this method is called.
*/
virtual bool wasModified();
private slots:
void slotProcessExited(TDEProcess*);
void slotReceivedStdout(TDEProcess* proc, char* buffer, int buflen);
void slotReceivedStderr(TDEProcess* proc, char* buffer, int buflen);
private:
// Process output when xsltproc exits.
void processOutput();
// If not empty, only apply to text queued by an applications containing one of these strings.
TQStringList m_appIdList;
// If not empty, only apply to XML that has the specified root element.
TQStringList m_rootElementList;
// If not empty, only apply to XML that has the specified DOCTYPE spec.
TQStringList m_doctypeList;
// The text that is being filtered.
TQString m_text;
// Processing state.
int m_state;
// xsltproc process.
TDEProcess* m_xsltProc;
// Input and Output filenames.
TQString m_inFilename;
TQString m_outFilename;
// User's name for the filter.
TQString m_UserFilterName;
// XSLT file.
TQString m_xsltFilePath;
// Path to xsltproc processor.
TQString m_xsltprocPath;
// Did this filter modify the text?
bool m_wasModified;
};
#endif // _XMLTRANSFORMERPROC_H_
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