Allow user to select tts voice in addition to engine.

To make tts more user friendly allow user to select which
voice is used for tts playback.

conf/okular.kcfg

@@ -207,6 +207,9 @@
   <entry key="ttsEngine" type="String">
     <default>speechd</default>
   </entry>
+  <entry key="ttsVoice" type="String">
+    <default></default>
+  </entry>
   <entry key="WatchFile" type="Bool" >
    <default>true</default>
   </entry>

part/dlgaccessibility.cpp

@@ -147,19 +147,42 @@ DlgAccessibility::DlgAccessibility(QWidget *parent)
     layout->addRow(new QLabel(this));
 
     // BEGIN Text-to-speech section
-    QComboBox *ttsEngine = new QComboBox(this);
+    m_ttsEngineBox = new QComboBox(this);
     // Populate tts engines and use their names directly as key and item text:
     const QStringList engines = QTextToSpeech::availableEngines();
     for (const QString &engine : engines) {
-        ttsEngine->addItem(engine);
+        m_ttsEngineBox->addItem(engine);
     }
-    ttsEngine->setProperty("kcfg_property", QByteArray("currentText"));
-    ttsEngine->setObjectName(QStringLiteral("kcfg_ttsEngine"));
-    layout->addRow(i18nc("@label:listbox Config dialog, accessibility page", "Text-to-speech engine:"), ttsEngine);
+    m_ttsEngineBox->setProperty("kcfg_property", QByteArray("currentText"));
+    m_ttsEngineBox->setObjectName(QStringLiteral("kcfg_ttsEngine"));
+    layout->addRow(i18nc("@label:listbox Config dialog, accessibility page", "Text-to-speech engine:"), m_ttsEngineBox);
+
+    connect(m_ttsEngineBox, qOverload<int>(&QComboBox::currentIndexChanged), this, &DlgAccessibility::slotTTSEngineChanged);
+
+    m_ttsVoiceBox = new QComboBox(this);
+    m_ttsVoiceBox->setProperty("kcfg_property", QByteArray("currentText"));
+    m_ttsVoiceBox->setObjectName(QStringLiteral("kcfg_ttsVoice"));
+    layout->addRow(i18nc("&label:listbox Config dialog, accessibility page", "Text-to-speech voice:"), m_ttsVoiceBox);
+
+    slotTTSEngineChanged();
     // END Text-to-speech section
 #endif
 }
 
+#ifdef HAVE_SPEECH
+void DlgAccessibility::slotTTSEngineChanged()
+{
+    QString engine = m_ttsEngineBox->currentText();
+    QTextToSpeech *ttsEngine = new QTextToSpeech(engine);
+    const QVector<QVoice> voices = ttsEngine->availableVoices();
+    m_ttsVoiceBox->clear();
+    for (const QVoice &voice : voices) {
+        m_ttsVoiceBox->addItem(voice.name());
+    }
+    delete ttsEngine;
+}
+#endif
+
 void DlgAccessibility::slotColorModeSelected(int mode)
 {
     if (mode == Okular::Settings::EnumRenderMode::Paper) {

part/dlgaccessibility.h

@@ -9,6 +9,7 @@
 
 #include <QWidget>
 
+class QComboBox;
 class QStackedWidget;
 
 class DlgAccessibility : public QWidget
@@ -20,9 +21,16 @@ public:
 
 protected Q_SLOTS:
     void slotColorModeSelected(int mode);
+#ifdef HAVE_SPEECH
+    void slotTTSEngineChanged();
+#endif
 
 protected:
     QStackedWidget *m_colorModeConfigStack;
+#ifdef HAVE_SPEECH
+    QComboBox *m_ttsEngineBox;
+    QComboBox *m_ttsVoiceBox;
+#endif
 };
 
 #endif

part/tts.cpp

@@ -20,6 +20,13 @@ public:
         : q(qq)
         , speech(new QTextToSpeech(Okular::Settings::ttsEngine()))
     {
+        const QVector<QVoice> voices = speech->availableVoices();
+        QString voiceName = Okular::Settings::ttsVoice();
+        for (const QVoice &voice : voices) {
+            if (voice.name() == voiceName) {
+                speech->setVoice(voice);
+            }
+        }
     }
 
     ~Private()
@@ -42,7 +49,7 @@ OkularTTS::OkularTTS(QObject *parent)
     // Initialize speechEngine so we can reinitialize if it changes.
     d->speechEngine = Okular::Settings::ttsEngine();
     connect(d->speech, &QTextToSpeech::stateChanged, this, &OkularTTS::slotSpeechStateChanged);
-    connect(Okular::Settings::self(), &KConfigSkeleton::configChanged, this, &OkularTTS::slotConfigChanged);
+    connect(Okular::Settings::self(), &KCoreConfigSkeleton::configChanged, this, &OkularTTS::slotConfigChanged);
 }
 
 OkularTTS::~OkularTTS()
@@ -94,6 +101,7 @@ void OkularTTS::slotSpeechStateChanged(QTextToSpeech::State state)
 void OkularTTS::slotConfigChanged()
 {
     const QString engine = Okular::Settings::ttsEngine();
+    const QString voiceName = Okular::Settings::ttsVoice();
     if (engine != d->speechEngine) {
         d->speech->stop();
         delete d->speech;
@@ -101,4 +109,12 @@ void OkularTTS::slotConfigChanged()
         connect(d->speech, &QTextToSpeech::stateChanged, this, &OkularTTS::slotSpeechStateChanged);
         d->speechEngine = engine;
     }
+
+    const QVector<QVoice> voices = d->speech->availableVoices();
+    for (const QVoice &voice : voices) {
+        if (voice.name() == voiceName) {
+            d->speech->setVoice(voice);
+            break;
+        }
+    }
 }