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/***************************************************** vim:set ts=4 sw=4 sts=4:
  KSpeech
  
  The KDE Text-to-Speech API.
  ------------------------------
  Copyright:
  (C) 2006 by Gary Cramblitt <garycramblitt@comcast.net>
  (C) 2009 by Jeremy Whiting <jpwhiting@kde.org>
  -------------------
  Original author: Gary Cramblitt <garycramblitt@comcast.net>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  This library 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 for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 ******************************************************************************/

#ifndef KSPEECH_H
#define KSPEECH_H

#include "kspeech_export.h"

// Qt includes
#include <QtCore/QObject>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QByteArray>

class KSpeechPrivate;

/**
* KSpeech -- the KDE Text-to-Speech API.
*
* Note: Applications do not use this class directly.  Instead,
* use the @ref KSpeechInterface object as described in
* @ref programming.
*
* See also @ref kspeech_intro
*/
class KSPEECH_EXPORT KSpeech : public QObject
{
Q_OBJECT

public:
    /**
    * @enum JobPriority
    * Determines the priority of jobs submitted by @ref say.
    * maps directly to SPDPriority
    */
    enum JobPriority
    {
        jpAll                = 0,    /**< All priorities.  Used for information retrieval only. */
        jpScreenReaderOutput = 1,    /**< Screen Reader job. SPD_IMPORTANT */
        jpWarning            = 2,    /**< Warning job. SPD_NOTIFICATION */
        jpMessage            = 3,    /**< Message job.SPD_MESSAGE */
        jpText               = 4,    /**< Text job. SPD_TEXT */
        jpProgress           = 5     /**< Progress report. SPD_PROGRESS added KDE 4.4 */ 
    };
    
    /**
    * @enum JobState
    * Job states returned by method @ref getJobState.
    */
    enum JobState
    {
        jsQueued      = 0,  /**< Job has been queued but is not yet speakable. */
        jsFiltering   = 1,  /**< Job is being filtered. */
        jsSpeakable   = 2,  /**< Job is speakable, but is not speaking. */
        jsSpeaking    = 3,  /**< Job is currently speaking. */
        jsPaused      = 4,  /**< Job is paused. */
        jsInterrupted = 5,  /**< Job is paused because it has been interrupted by another job. */
        jsFinished    = 6,  /**< Job is finished and is deleteable. */
        jsDeleted     = 7   /**< Job is deleted from the queue. */
    };
    
    /**
    * @enum SayOptions
    * Hints about text content when sending via @ref say.
    */
    enum SayOptions
    {
        soNone      = 0x0000,   /**< No options specified.  Autodetected. */
        soPlainText = 0x0001,   /**< The text contains plain text. */
        soHtml      = 0x0002,   /**< The text contains HTML markup. */
        soSsml      = 0x0004,   /**< The text contains SSML markup. */
        soChar      = 0x0008,   /**< The text should be spoken as individual characters. */
        soKey       = 0x0010,   /**< The text contains a keyboard symbolic key name. */
        soSoundIcon = 0x0020    /**< The text is the name of a sound icon. */
    };
    
    /**
    * @enum TalkerCapabilities1
    * Flags for synthesizer/talker capabilities.
    * All items marked FALSE are hard-coded off at this time.
    */
    enum TalkerCapabilities1
    {
        tcCanListVoices                         = 0x00000001,
        tcCanSetVoiceByProperties               = 0x00000002,
        tcCanGetCurrentVoice                    = 0x00000004,
        tcCanSetRateRelative                    = 0x00000008, /**< FALSE */
        tcCanSetRateAbsolute                    = 0x00000010,
        tcCanGetRateDefault                     = 0x00000020,
        tcCanSetPitchRelative                   = 0x00000040, /**< FALSE */
        tcCanSetPitchAbsolute                   = 0x00000080,
        tcCanGetPitchDefault                    = 0x00000100,
        tcCanSetPitchRangeRelative              = 0x00000200, /**< FALSE */
        tcCanSetPitchRangeAbsolute              = 0x00000400, /**< FALSE */
        tcCanGetPitchRangeDefault               = 0x00000800, /**< FALSE */
        tcCanSetVolumeRelative                  = 0x00001000, /**< FALSE */
        tcCanSetVolumeAbsolute                  = 0x00002000,
        tcCanGetVolumeDefault                   = 0x00004000,
        tcCanSetPunctuationModeAll              = 0x00008000, /**< FALSE */
        tcCanSetPunctuationModeNone             = 0x00010000, /**< FALSE */
        tcCanSetPunctuationModeSome             = 0x00020000, /**< FALSE */
        tcCanSetPunctuationDetail               = 0x00040000, /**< FALSE */
        tcCanSetCapitalLettersModeSpelling      = 0x00080000, /**< FALSE */
        tcCanSetCapitalLettersModeIcon          = 0x00100000, /**< FALSE */
        tcCanSetCapitalLettersModePitch         = 0x00200000, /**< FALSE */
        tcCanSetNumberGrouping                  = 0x00400000, /**< FALSE */
        tcCanSayTextFromPosition                = 0x00800000, /**< FALSE */
        tcCanSayChar                            = 0x01000000, /**< FALSE */
        tcCanSayKey                             = 0x02000000, /**< FALSE */
        tcCanSayIcon                            = 0x04000000, /**< FALSE */
        tcCanSetDictionary                      = 0x08000000, /**< FALSE */
        tcCanRetrieveAudio                      = 0x10000000, /**< FALSE */
        tcCanPlayAudio                          = 0x20000000  /**< FALSE */
    };
    
    /**
    * @enum TalkerCapabilities2
    * All items marked FALSE are hard-coded off at this time.
    */
    enum TalkerCapabilities2
    {
        tcCanReportEventsBySentences            = 0x00000001,
        tcCanReportEventsByWords                = 0x00000002, /**< FALSE */
        tcCanReportCustomIndexMarks             = 0x00000004, /**< FALSE */
        tcHonorsPerformanceGuidelines1          = 0x00000008, /**< FALSE */
        tcHonorsPerformanceGuidelines2          = 0x00000010, /**< FALSE */
        tcHonorsPerformanceGuidelines           = 0x00000018, /**< FALSE */
        tcCanDeferMessage                       = 0x00000020, /**< FALSE */
        tcCanParseSsml                          = 0x00000040,
        tcSupportsMultilingualUtterances        = 0x00000080, /**< FALSE */
        tcCanParseHtml                          = 0x00000100
    };

    /**
    * @enum MarkerType
    * Types of markers emitted by @ref marker signal.
    */
    enum MarkerType
    {
        mtSentenceBegin = 0,
        mtSentenceEnd   = 1,
        mtWordBegin     = 2,
        mtPhonemeBegin  = 3,
        mtCustom        = 4
    };

    /**
    * Constructor.
    * Note: Applications do not create instances of KSpeech.
    * Instead create KSpeechInterface object.  See @ref programming.
    */
    KSpeech(QObject *parent=0);

    /**
    * Destructor.
    */
    ~KSpeech();

public: // PROPERTIES
    Q_PROPERTY(bool isSpeaking READ isSpeaking)
    Q_PROPERTY(QString version READ version)

public Q_SLOTS: // METHODS
    /**
    * Returns true if KTTSD is currently speaking.
    * @return               True if currently speaking.
    */
    bool isSpeaking() const;

    /**
    * Returns the version number of KTTSD.
    * @return               Version number string.
    */
    QString version() const;

    /**
    * Returns the friendly display name for the application.
    * @return               Application display name.
    *
    * If application has not provided a friendly name, the DBUS connection name is returned.
    */
    QString applicationName();

    /**
    * Sets a friendly display name for the application.
    * @param applicationName    Friendly name for the application.
    */    
    void setApplicationName(const QString &applicationName);

    /**
    * Returns the default talker for the application.
    * @return                   Talker.
    *
    * The default is "", which uses the default talker configured by user.
    */
    QString defaultTalker();

    /**
    * Sets the default talker for the application.
    * @param defaultTalker      Default talker.  Example: "en".
    */
    void setDefaultTalker(const QString &defaultTalker);

    /**
    * Returns the default priority for speech jobs submitted by the application.
    * @return                   Default job priority.
    *
    * @see JobPriority
    */
    int defaultPriority();

    /**
    * Sets the default priority for speech jobs submitted by the application.
    * @param defaultPriority    Default job priority.
    *
    * @see JobPriority
    */
    void setDefaultPriority(int defaultPriority);

    /**
    * Returns the regular expression used to perform Sentence Boundary
    * Detection (SBD) for the application.
    * @return               Sentence delimiter regular expression.
    *
    * The default sentence delimiter is
      @verbatim
          ([\\.\\?\\!\\:\\;])(\\s|$|(\\n *\\n))
      @endverbatim
    *
    * Note that backward slashes must be escaped.
    *
    * @see sentenceparsing
    */
    QString sentenceDelimiter();

    /**
    * Sets the regular expression used to perform Sentence Boundary
    * Detection (SBD) for the application.
    * @param sentenceDelimiter  Sentence delimiter regular expression.
    */
    void setSentenceDelimiter(const QString &sentenceDelimiter);

    /**
    * Returns whether speech jobs for this application are filtered using configured
    * filter plugins.
    * @return               True if filtering is on.
    *
    * Filtering is on by default.
    */
    bool filteringOn();

    /**
    * Sets whether speech jobs for this application are filtered using configured
    * filter plugins.
    * @param filteringOn    True to set filtering on.
    */
    void setFilteringOn(bool filteringOn);

    /**
    * Returns whether KTTSD will automatically attempt to configure new
    * talkers to meet required talker attributes.
    * @return               True if KTTSD will autoconfigure talkers.
    *
    * @see defaultTalker
    */
    bool autoConfigureTalkersOn();
    
    /** Sets whether KTTSD will automatically attempt to configure new
    * talkers to meet required talker attributes.
    * @param autoConfigureTalkersOn True to enable auto configuration.
    */
    void setAutoConfigureTalkersOn(bool autoConfigureTalkersOn);

    /**
    * Returns whether application is paused.
    * @return               True if application is paused.
    */
    bool isApplicationPaused();
    
    /**
    * Returns the full path name to XSLT file used to convert HTML
    * markup to speakable form.
    * @return               XSLT filename.
    */
    QString htmlFilterXsltFile();

    /**
    * Sets the full path name to an XSLT file used to convert HTML
    * markup to speakable form.
    * @param htmlFilterXsltFile XSLT filename.
    */
    void setHtmlFilterXsltFile(const QString &htmlFilterXsltFile);

    /**
    * Returns the full path name to XSLT file used to convert SSML
    * markup to a speakable form.
    * @return                   XSLT filename.
    */    
    QString ssmlFilterXsltFile();

    /**
    * Sets the full path name to XSLT file used to convert SSML
    * markup to a speakable form.
    * @param ssmlFilterXsltFile XSLT filename.
    */
    void setSsmlFilterXsltFile(const QString &ssmlFilterXsltFile);

    /**
    * Returns whether this is a System Manager application.
    * @return                   True if the application is a System Manager.
    */
    bool isSystemManager();

    /**
    * Sets whether this is a System Manager application.
    * @param isSystemManager    True if this is a System Manager.
    *
    * System Managers are used to control and configure overall TTS output.
    * When True, many of the KSpeech methods alter their behavior.
    */
    void setIsSystemManager(bool isSystemManager);

    /**
    * Creates and starts a speech job.  The job is created at the application's
    * default job priority using the default talker.
    * @param text               The text to be spoken.
    * @param options            Speech options.
    * @return                   Job Number for the new job.
    *
    * @see JobPriority
    * @see SayOptions
    */
    int say(const QString &text, int options);

    /**
    * Creates and starts a speech job from a specified file.
    * @param filename           Full path name of the file.
    * @param encoding           The encoding of the file.  Default UTF-8.
    * @return                   Job Number for the new job.
    *
    * The job is spoken using application's default talker.
    * @see defaultTalker
    *
    * Plain text is parsed into individual sentences using the current sentence delimiter.
    * Call @ref setSentenceDelimiter to change the sentence delimiter prior to calling sayFile.
    * Call @ref getSentenceCount to retrieve the sentence count after calling sayFile.
    *
    * The text may contain speech mark language, such as SMML,
    * provided that the speech plugin/engine support it.  In this case,
    * sentence parsing follows the semantics of the markup language.
    */
    int sayFile(const QString &filename, const QString &encoding);

    /**
    * Submits a speech job from the contents of the clipboard.
    * The job is spoken using application's default talker.
    * @return                   Job Number for the new job.
    *
    * @see defaultTalker
    */
    int sayClipboard();

    /**
    * Pauses speech jobs belonging to the application.
    * When called by a System Manager, pauses all jobs of all applications.
    */
    void pause();

    /**
    * Resumes speech jobs belonging to the application.
    * When called by a System Manager, resumes all jobs of all applications.
    */
    void resume();

    
    void stop();
    void cancel();

    void setSpeed(int speed);
    void setPitch(int pitch);
    void setVolume(int volume);
    
    /**
    * Removes the specified job.  If the job is speaking, it is stopped.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    */
    void removeJob(int jobNum);

    /**
    * Removes all jobs belonging to the application.
    * When called from a System Manager, removes all jobs of all applications.
    */
    void removeAllJobs();

    /**
    * Returns the number of sentences in a job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @return                   Number of sentences in the job.
    */
    int getSentenceCount(int jobNum);

    /**
    * Returns the job number of the currently speaking job (any application).
    * @return                    Job Number
    */
    int getCurrentJob();

    /**
    * Returns the number of jobs belonging to the application
    * with the specified job priority.
    * @param priority           Job Priority.
    * @return                   Number of jobs.
    *
    * If priority is KSpeech::jpAll, returns the number of jobs belonging
    * to the application (all priorities).
    *
    * When called from a System Manager, returns count of all jobs of the
    * specified priority for all applications.
    *
    * @see JobPriority
    */
    int getJobCount(int priority);

    /**
    * Returns a list job numbers for the jobs belonging to the
    * application with the specified priority.
    * @param priority           Job Priority.
    * @return                   List of job numbers.  Note that the numbers
    *                           are strings.
    *
    * If priority is KSpeech::jpAll, returns the job numbers belonging
    * to the application (all priorities).
    *
    * When called from a System Manager, returns job numbers of the
    * specified priority for all applications.
    *
    * @see JobPriority
    */
    QStringList getJobNumbers(int priority);

    /**
    * Returns the state of a job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @return                   Job state.
    *
    * @see JobState
    */
    int getJobState(int jobNum);

    /**
    * Get information about a job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @return               A QDataStream containing information about the job.
    *                       Blank if no such job.
    *
    * The stream contains the following elements:
    *   - int priority      Job Type.
    *   - int state         Job state.
    *   - QString appId     DBUS senderId of the application that requested the speech job.
    *   - QString talker    Talker code as requested by application.
    *   - int sentenceNum   Current sentence being spoken.  Sentences are numbered starting at 1.
    *   - int sentenceCount Total number of sentences in the job.
    *   - QString applicationName Application's friendly name (if provided by app)
    *
    * If the job is currently filtering, waits for that to finish before returning.
    *
    * The following sample code will decode the stream:
            @verbatim
                QByteArray jobInfo = m_kspeech->getJobInfo(jobNum);
                if (jobInfo != QByteArray()) {
                    QDataStream stream(&jobInfo, QIODevice::ReadOnly);
                    qint32 priority;
                    qint32 state;
                    QString talker;
                    qint32 sentenceNum;
                    qint32 sentenceCount;
                    QString applicationName;
                    stream >> priority;
                    stream >> state;
                    stream >> appId;
                    stream >> talker;
                    stream >> sentenceNum;
                    stream >> sentenceCount;
                    stream >> applicationName;
                };
            @endverbatim
    */
    QByteArray getJobInfo(int jobNum);

    /**
    * Return a sentence of a job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @param sentenceNum    Sentence Number.  Sentence numbers start at 1.
    * @return               The specified sentence in the specified job.  If no such
    *                       job or sentence, returns "".
    */
    QString getJobSentence(int jobNum, int sentenceNum);

    /**
    * Return a list of full Talker Codes for configured talkers.
    * @return               List of Talker codes.
    */
    QStringList getTalkerCodes();

    /**
    * Given a talker, returns the Talker ID for the talker.
    * that will speak the job.
    * @param talker         Talker.  Example: "en".
    * @return               Talker ID.  A Talker ID is an internally-assigned
    *                       identifier for a talker.
    *
    * This method is normally used only by System Managers.
    */
    QString talkerToTalkerId(const QString &talker);

    /**
    * Returns a bitarray giving the capabilities of a talker.
    * @param talker         Talker.  Example: "en".
    * @return               A word with bits set according to the capabilities
    *                       of the talker.
    *
    * @see TalkerCapabilities1
    * @see getTalkerCapabilities2
    */
    int getTalkerCapabilities1(const QString &talker);

    /**
    * Returns a bitarray giving the capabilities of a talker.
    * @param talker         Talker.  Example: "en".
    * @return               A word with bits set according to the capabilities
    *                       of the talker.
    *
    * @see TalkerCapabilities2
    * @see getTalkerCapabilities1
    */
    int getTalkerCapabilities2(const QString &talker);

    /**
    * Return a list of the voice codes of voices available in the synthesizer
    * corresponding to a talker.
    * @param talker         Talker.  Example: "synthesizer='Festival'"
    * @return               List of voice codes.
    *
    * Voice codes are synthesizer specific.
    */
    QStringList getTalkerVoices(const QString &talker);

    /**
    * Change the talker of an already-submitted job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @param talker             Desired new talker.
    */
    void changeJobTalker(int jobNum, const QString &talker);

    /**
    * Move a job one position down in the queue so that it is spoken later.
    * If the job is already speaking, it is stopped and will resume
    * when processing next gets to it.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    *
    * Since there is only one ScreenReaderOutput, this method is meaningless
    * for ScreenReaderOutput jobs.
    */    
    void moveJobLater(int jobNum);

    /**
    * Advance or rewind N sentences in a job.
    * @param jobNum             Job Number.  If 0, the last job submitted by
    *                           the application.
    * @param n              Number of sentences to advance (positive) or rewind (negative)
    *                       in the job.
    * @return               Number of the sentence actually moved to.  Sentence numbers
    *                       are numbered starting at 1.
    *
    * If no such job, does nothing and returns 0.
    * If n is zero, returns the current sentence number of the job.
    * Does not affect the current speaking/not-speaking state of the job.
    *
    * Since ScreenReaderOutput jobs are not split into sentences, this method
    * is meaningless for ScreenReaderOutput jobs.
    */    
    int moveRelSentence(int jobNum, int n);

    /**
    * Display the KttsMgr program so that user can configure KTTS options.
    * Only one instance of KttsMgr is displayed.
    */
    void showManagerDialog();

    /**
    * Shuts down KTTSD.  Do not call this!
    */
    void kttsdExit();

    /**
    * post ctor helper method that instantiates the dbus adaptor class, and registers
    */
    void init();

    /**
    * Cause KTTSD to re-read its configuration.
    */
    void reinit();
    
    /** Called by DBusAdaptor so that KTTSD knows the application that
    * called it.
    * @param appId              DBUS connection name that called KSpeech.
    */
    void setCallingAppId(const QString& appId);
        
Q_SIGNALS: // SIGNALS
    /**
    * This signal is emitted when KTTSD starts.
    */
    void kttsdStarted();
    
    /**
    * This signal is emitted just before KTTS exits.
    */
    void kttsdExiting();

    /**
    * This signal is emitted each time the state of a job changes.
    * @param appId              The DBUS connection name of the application that
    *                           submitted the job.
    * @param jobNum             Job Number.
    * @param state              Job state.  @ref JobState.
    */
    void jobStateChanged(const QString &appId, int jobNum, int state);

    /**
    * This signal is emitted when a marker is processed.
    * Currently only emits mtSentenceBegin and mtSentenceEnd.
    * @param appId         The DBUS connection name of the application that submitted the job.
    * @param jobNum        Job Number of the job emitting the marker.
    * @param markerType    The type of marker.
    *                      Currently either mtSentenceBegin or mtSentenceEnd.
    * @param markerData    Data for the marker.
    *                      Currently, this is the sentence number of the sentence
    *                      begun or ended.  Sentence numbers begin at 1.
    */
    void marker(const QString &appId, int jobNum, int markerType, const QString &markerData);

    /**
     * This signal is emitted when a new job coming in is filtered (or not filtered if no filters
     * are on).
     * @param prefilterText     The text of the speech job
     * @param postfilterText    The text of the speech job after any filters have been applied
     */
    void newJobFiltered(const QString &prefilterText, const QString &postfilterText);

private Q_SLOTS:
    void slotJobStateChanged(const QString& appId, int jobNum, KSpeech::JobState state);
    void slotMarker(const QString& appId, int jobNum, KSpeech::MarkerType markerType, const QString& markerData);
    void slotFilteringFinished();
    
private:
    /**
    * The DBUS connection name of the last application that called KTTSD.
    */
    QString callingAppId();
    
    /*
    * Checks if KTTSD is ready to speak and at least one talker is configured.
    * If not, user is prompted to display the configuration dialog.
    */
    bool ready();
    
    /**
    * Create and initialize the Configuration Data object.
    */
    bool initializeConfigData();

    /*
    * Create and initialize the SpeechData object.
    * Deprecated, remove in KDE 5
    */
    bool initializeSpeechData();

    /*
    * Create and initialize the TalkerMgr object.
    */
    bool initializeTalkerMgr();

    /*
    * Create and initialize the speaker.
    */
    bool initializeSpeaker();

    /*
    * If a job number is 0, returns the default job number for a command.
    * Returns the job number of the last job queued by the application, or if
    * no such job, the current job number.
    * @param jobNum          The job number passed in the DBUS message.  May be 0.
    * @return                Default job number.  0 if no such job.
    */
    int applyDefaultJobNum(int jobNum);

    /*
    * Announces an event to kDebug.
    */
    void announceEvent(const QString& slotName, const QString& eventName);
    void announceEvent(const QString& slotName, const QString& eventName, const QString& appId,
        int jobNum, MarkerType markerType, const QString& markerData);
    void announceEvent(const QString& slotName, const QString& eventName, const QString& appId,
        int jobNum, JobState state);

private:
    KSpeechPrivate* d;
};

#endif // KSPEECH_H