okular/ui/tts.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Pino Toscano <pino@kde.org>                     *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  ***************************************************************************/
   9
  10 #include "tts.h"
  11
  12 #include <qset.h>
  13
  14 #include <klocale.h>
  15 #include <kspeech.h>
  16 #include <ktoolinvocation.h>
  17
  18 #include "kspeechinterface.h"
  19
  20 /* Private storage. */
  21 class OkularTTS::Private
  22 {
  23 public:
  24     Private( OkularTTS *qq )
  25         : q( qq ), kspeech( 0 )
  26     {
  27     }
  28
  29     void setupIface();
  30     void teardownIface();
  31
  32     OkularTTS *q;
  33     org::kde::KSpeech* kspeech;
  34     QSet< int > jobs;
  35 };
  36
  37 void OkularTTS::Private::setupIface()
  38 {
  39     if ( kspeech )
  40         return;
  41
  42     // If KTTSD not running, start it.
  43     QDBusReply<bool> reply = QDBusConnection::sessionBus().interface()->isServiceRegistered( "org.kde.kttsd" );
  44     bool kttsdactive = false;
  45     if ( reply.isValid() )
  46         kttsdactive = reply.value();
  47     if ( !kttsdactive )
  48     {
  49         QString error;
  50         if ( KToolInvocation::startServiceByDesktopName( "kttsd", QStringList(), &error ) )
  51         {
  52             emit q->errorMessage( i18n( "Starting KTTSD Failed: %1", error ) );
  53         }
  54         else
  55         {
  56             kttsdactive = true;
  57         }
  58     }
  59     if ( kttsdactive )
  60     {
  61         // creating the connection to the kspeech interface
  62         kspeech = new org::kde::KSpeech( "org.kde.kttsd", "/KSpeech", QDBusConnection::sessionBus() );
  63         kspeech->setParent( q );
  64         kspeech->setApplicationName( "Okular" );
  65         connect( kspeech, SIGNAL( jobStateChanged( const QString &, int, int ) ),
  66                  q, SLOT( slotJobStateChanged( const QString &, int, int ) ) );
  67         connect( QDBusConnection::sessionBus().interface(), SIGNAL( serviceUnregistered( const QString & ) ),
  68                  q, SLOT( slotServiceUnregistered( const QString & ) ) );
  69         connect( QDBusConnection::sessionBus().interface(), SIGNAL( serviceOwnerChanged( const QString &, const QString &, const QString & ) ),
  70                  q, SLOT( slotServiceOwnerChanged( const QString &, const QString &, const QString & ) ) );
  71     }
  72 }
  73
  74 void OkularTTS::Private::teardownIface()
  75 {
  76     disconnect( QDBusConnection::sessionBus().interface(), 0, q, 0 );
  77
  78     delete kspeech;
  79     kspeech = 0;
  80 }
  81
  82
  83 OkularTTS::OkularTTS( QObject *parent )
  84     : QObject( parent ), d( new Private( this ) )
  85 {
  86 }
  87
  88 OkularTTS::~OkularTTS()
  89 {
  90     delete d;
  91 }
  92
  93 void OkularTTS::say( const QString &text )
  94 {
  95     if ( text.isEmpty() )
  96         return;
  97
  98     d->setupIface();
  99     if ( d->kspeech )
 100     {
 101         QDBusReply< int > reply = d->kspeech->say( text, KSpeech::soPlainText );
 102         if ( reply.isValid() )
 103         {
 104             d->jobs.insert( reply.value() );
 105             emit hasSpeechs( true );
 106         }
 107     }
 108 }
 109
 110 void OkularTTS::stopAllSpeechs()
 111 {
 112     if ( !d->kspeech )
 113         return;
 114
 115     d->kspeech->removeAllJobs();
 116 }
 117
 118 void OkularTTS::slotServiceUnregistered( const QString &service )
 119 {
 120     if ( service == QLatin1String( "org.kde.kttsd" ) )
 121     {
 122         d->teardownIface();
 123     }
 124 }
 125
 126 void OkularTTS::slotServiceOwnerChanged( const QString &service, const QString &, const QString &newOwner )
 127 {
 128     if ( service == QLatin1String( "org.kde.kttsd" ) && newOwner.isEmpty() )
 129     {
 130         d->teardownIface();
 131     }
 132 }
 133
 134 void OkularTTS::slotJobStateChanged( const QString &appId, int jobNum, int state )
 135 {
 136     // discard non ours job
 137     if ( appId != QDBusConnection::sessionBus().baseService() || !d->kspeech )
 138         return;
 139
 140     switch ( state )
 141     {
 142         case KSpeech::jsDeleted:
 143             d->jobs.remove( jobNum );
 144             emit hasSpeechs( !d->jobs.isEmpty() );
 145             break;
 146         case KSpeech::jsFinished:
 147             d->kspeech->removeJob( jobNum );
 148             break;
 149     }
 150 }
 151
 152 #include "tts.moc"