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+/***************************************************** vim:set ts=4 sw=4 sts=4:
+ Description:
+ Filters text, applying each configured Filter in turn.
+ Runs asynchronously, emitting Finished() signal when all Filters have run.
+
+ 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.
+ ******************************************************************************/
+
+// KDE includes.
+#include <kdebug.h>
+#include <kconfig.h>
+#include <ktrader.h>
+#include <kparts/componentfactory.h>
+#include <klocale.h>
+
+// FilterMgr includes.
+#include "filtermgr.h"
+#include "filtermgr.moc"
+
+/**
+ * Constructor.
+ */
+FilterMgr::FilterMgr( QObject *parent, const char *name) :
+ KttsFilterProc(parent, name)
+{
+ // kdDebug() << "FilterMgr::FilterMgr: Running" << endl;
+ m_state = fsIdle;
+ m_noSBD = false;
+ m_supportsHTML = false;
+ m_talkerCode = 0;
+}
+
+/**
+ * Destructor.
+ */
+FilterMgr::~FilterMgr()
+{
+ // kdDebug() << "FilterMgr::~FilterMgr: Running" << endl;
+ if ( m_state == fsFiltering )
+ stopFiltering();
+ m_filterList.setAutoDelete( TRUE );
+ m_filterList.clear();
+}
+
+/**
+ * Loads and initializes the filters.
+ * @param config Settings object.
+ * @return False if FilterMgr is not ready to filter.
+ */
+bool FilterMgr::init(KConfig *config, const QString& /*configGroup*/)
+{
+ // Load each of the filters and initialize.
+ config->setGroup("General");
+ QStringList filterIDsList = config->readListEntry("FilterIDs", ',');
+ // kdDebug() << "FilterMgr::init: FilterIDs = " << filterIDsList << endl;
+ // If no filters have been configured, automatically configure the standard SBD.
+ if (filterIDsList.isEmpty())
+ {
+ config->setGroup("Filter_1");
+ config->writeEntry("DesktopEntryName", "kttsd_sbdplugin");
+ config->writeEntry("Enabled", true);
+ config->writeEntry("IsSBD", true);
+ config->writeEntry("MultiInstance", true);
+ config->writeEntry("SentenceBoundary", "\\1\\t");
+ config->writeEntry("SentenceDelimiterRegExp", "([\\.\\?\\!\\:\\;])(\\s|$|(\\n *\\n))");
+ config->writeEntry("UserFilterName", i18n("Standard Sentence Boundary Detector"));
+ config->setGroup("General");
+ config->writeEntry("FilterIDs", "1");
+ filterIDsList = config->readListEntry("FilterIDs", ',');
+ }
+ if ( !filterIDsList.isEmpty() )
+ {
+ QStringList::ConstIterator itEnd = filterIDsList.constEnd();
+ for (QStringList::ConstIterator it = filterIDsList.constBegin(); it != itEnd; ++it)
+ {
+ QString filterID = *it;
+ QString groupName = "Filter_" + filterID;
+ config->setGroup( groupName );
+ QString desktopEntryName = config->readEntry( "DesktopEntryName" );
+ // If a DesktopEntryName is not in the config file, it was configured before
+ // we started using them, when we stored translated plugin names instead.
+ // Try to convert the translated plugin name to a DesktopEntryName.
+ // DesktopEntryNames are better because user can change their desktop language
+ // and DesktopEntryName won't change.
+ if (desktopEntryName.isEmpty())
+ {
+ QString filterPlugInName = config->readEntry("PlugInName", QString::null);
+ // See if the translated name will untranslate. If not, well, sorry.
+ desktopEntryName = FilterNameToDesktopEntryName(filterPlugInName);
+ // Record the DesktopEntryName from now on.
+ if (!desktopEntryName.isEmpty()) config->writeEntry("DesktopEntryName", desktopEntryName);
+ }
+ if (config->readBoolEntry("Enabled") || config->readBoolEntry("IsSBD"))
+ {
+ // kdDebug() << "FilterMgr::init: filterID = " << filterID << endl;
+ KttsFilterProc* filterProc = loadFilterPlugin( desktopEntryName );
+ if ( filterProc )
+ {
+ filterProc->init( config, groupName );
+ m_filterList.append( filterProc );
+ }
+ if (config->readEntry("DocType").contains("html") ||
+ config->readEntry("RootElement").contains("html"))
+ m_supportsHTML = true;
+ }
+ }
+ }
+ return true;
+}
+
+/**
+ * Returns True if this filter is a Sentence Boundary Detector.
+ * If so, the filter should implement @ref setSbRegExp() .
+ * @return True if this filter is a SBD.
+ */
+/*virtual*/ bool FilterMgr::isSBD() { return true; }
+
+/**
+ * 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 FilterMgr::supportsAsync() { return true; }
+
+/**
+ * Synchronously convert text.
+ * @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 Converted text.
+ */
+QString FilterMgr::convert(const QString& inputText, TalkerCode* talkerCode, const QCString& appId)
+{
+ m_text = inputText;
+ m_talkerCode = talkerCode;
+ m_appId = appId;
+ m_filterIndex = -1;
+ m_filterProc = 0;
+ m_state = fsFiltering;
+ m_async = false;
+ while ( m_state == fsFiltering )
+ nextFilter();
+ return m_text;
+}
+
+/**
+ * Aynchronously convert input.
+ * @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.
+ *
+ * When the input text has been converted, filteringFinished signal will be emitted
+ * and caller can retrieve using getOutput();
+*/
+bool FilterMgr::asyncConvert(const QString& inputText, TalkerCode* talkerCode, const QCString& appId)
+{
+ m_text = inputText;
+ m_talkerCode = talkerCode;
+ m_appId = appId;
+ m_filterIndex = -1;
+ m_filterProc = 0;
+ m_state = fsFiltering;
+ m_async = true;
+ nextFilter();
+ return true;
+}
+
+// Finishes up with current filter (if any) and goes on to the next filter.
+void FilterMgr::nextFilter()
+{
+ if ( m_filterProc )
+ {
+ if ( m_filterProc->supportsAsync() )
+ {
+ m_text = m_filterProc->getOutput();
+ m_filterProc->ackFinished();
+ disconnect( m_filterProc, SIGNAL(filteringFinished()), this, SLOT(slotFilteringFinished()) );
+ }
+ // if ( m_filterProc->wasModified() )
+ // kdDebug() << "FilterMgr::nextFilter: Filter# " << m_filterIndex << " modified the text." << endl;
+ if ( m_filterProc->wasModified() && m_filterProc->isSBD() )
+ {
+ m_state = fsFinished;
+ // Post an event which will be later emitted as a signal.
+ QCustomEvent* ev = new QCustomEvent(QEvent::User + 301);
+ QApplication::postEvent(this, ev);
+ return;
+ }
+ }
+ ++m_filterIndex;
+ if ( m_filterIndex == static_cast<int>(m_filterList.count()) )
+ {
+ m_state = fsFinished;
+ // Post an event which will be later emitted as a signal.
+ QCustomEvent* ev = new QCustomEvent(QEvent::User + 301);
+ QApplication::postEvent(this, ev);
+ return;
+ }
+ m_filterProc = m_filterList.at(m_filterIndex);
+ if ( m_noSBD && m_filterProc->isSBD() )
+ {
+ m_state = fsFinished;
+ // Post an event which will be later emitted as a signal.
+ QCustomEvent* ev = new QCustomEvent(QEvent::User + 301);
+ QApplication::postEvent(this, ev);
+ return;
+ }
+ m_filterProc->setSbRegExp( m_re );
+ if ( m_async )
+ {
+ if ( m_filterProc->supportsAsync() )
+ {
+ // kdDebug() << "FilterMgr::nextFilter: calling asyncConvert on filter " << m_filterIndex << endl;
+ connect( m_filterProc, SIGNAL(filteringFinished()), this, SLOT(slotFilteringFinished()) );
+ if ( !m_filterProc->asyncConvert( m_text, m_talkerCode, m_appId ) )
+ {
+ disconnect( m_filterProc, SIGNAL(filteringFinished()), this, SLOT(slotFilteringFinished()) );
+ m_filterProc = 0;
+ nextFilter();
+ }
+ } else {
+ m_text = m_filterProc->convert( m_text, m_talkerCode, m_appId );
+ nextFilter();
+ }
+ } else
+ m_text = m_filterProc->convert( m_text, m_talkerCode, m_appId );
+}
+
+// Received when each filter finishes.
+void FilterMgr::slotFilteringFinished()
+{
+ // kdDebug() << "FilterMgr::slotFilteringFinished: received signal from filter " << m_filterIndex << endl;
+ nextFilter();
+}
+
+bool FilterMgr::event ( QEvent * e )
+{
+ if ( e->type() == (QEvent::User + 301) )
+ {
+ // kdDebug() << "FilterMgr::event: emitting filteringFinished signal." << endl;
+ emit filteringFinished();
+ return true;
+ }
+ if ( e->type() == (QEvent::User + 302) )
+ {
+ // kdDebug() << "FilterMgr::event: emitting filteringStopped signal." << endl;
+ emit filteringStopped();
+ return true;
+ }
+ else return false;
+}
+
+/**
+ * Waits for filtering to finish.
+ */
+void FilterMgr::waitForFinished()
+{
+ if ( m_state != fsFiltering ) return;
+ disconnect(m_filterProc, SIGNAL(filteringFinished()), this, SLOT(slotFilteringFinished()) );
+ m_async = false;
+ m_filterProc->waitForFinished();
+ while ( m_state == fsFiltering )
+ nextFilter();
+}
+
+/**
+ * Returns the state of the FilterMgr.
+ */
+int FilterMgr::getState() { return m_state; }
+
+/**
+ * Returns the filtered output.
+ */
+QString FilterMgr::getOutput()
+{
+ return m_text;
+}
+
+/**
+ * Acknowledges the finished filtering.
+ */
+void FilterMgr::ackFinished()
+{
+ m_state = fsIdle;
+ m_text = QString::null;
+}
+
+/**
+ * Stops filtering. The filteringStopped signal will emit when filtering
+ * has in fact stopped.
+ */
+void FilterMgr::stopFiltering()
+{
+ if ( m_state != fsFiltering ) return;
+ if ( m_async )
+ disconnect( m_filterProc, SIGNAL(filteringFinished()), this, SLOT(slotFilteringFinished()) );
+ m_filterProc->stopFiltering();
+ m_state = fsIdle;
+ QCustomEvent* ev = new QCustomEvent(QEvent::User + 302);
+ QApplication::postEvent(this, ev);
+}
+
+/**
+ * Set Sentence Boundary Regular Expression.
+ * This method will only be called if the application overrode the default.
+ *
+ * @param re The sentence delimiter regular expression.
+ */
+/*virtual*/ void FilterMgr::setSbRegExp(const QString& re)
+{
+ m_re = re;
+}
+
+/**
+ * Do not call SBD filters.
+ */
+void FilterMgr::setNoSBD(bool noSBD) { m_noSBD = noSBD; }
+bool FilterMgr::noSBD() { return m_noSBD; }
+
+// Loads the processing plug in for a filter plug in given its DesktopEntryName.
+KttsFilterProc* FilterMgr::loadFilterPlugin(const QString& desktopEntryName)
+{
+ // kdDebug() << "FilterMgr::loadFilterPlugin: Running"<< endl;
+
+ // Find the plugin.
+ KTrader::OfferList offers = KTrader::self()->query("KTTSD/FilterPlugin",
+ QString("DesktopEntryName == '%1'").arg(desktopEntryName));
+
+ if (offers.count() == 1)
+ {
+ // When the entry is found, load the plug in
+ // First create a factory for the library
+ KLibFactory *factory = KLibLoader::self()->factory(offers[0]->library().latin1());
+ if(factory){
+ // If the factory is created successfully, instantiate the KttsFilterConf class for the
+ // specific plug in to get the plug in configuration object.
+ int errorNo;
+ KttsFilterProc *plugIn =
+ KParts::ComponentFactory::createInstanceFromLibrary<KttsFilterProc>(
+ offers[0]->library().latin1(), NULL, offers[0]->library().latin1(),
+ QStringList(), &errorNo);
+ if(plugIn){
+ // If everything went ok, return the plug in pointer.
+ return plugIn;
+ } else {
+ // Something went wrong, returning null.
+ kdDebug() << "FilterMgr::loadFilterPlugin: Unable to instantiate KttsFilterProc class for plugin " << desktopEntryName << " error: " << errorNo << endl;
+ return NULL;
+ }
+ } else {
+ // Something went wrong, returning null.
+ kdDebug() << "FilterMgr::loadFilterPlugin: Unable to create Factory object for plugin "
+ << desktopEntryName << endl;
+ return NULL;
+ }
+ }
+ // The plug in was not found (unexpected behaviour, returns null).
+ kdDebug() << "FilterMgr::loadFilterPlugin: KTrader did not return an offer for plugin "
+ << desktopEntryName << endl;
+ return NULL;
+}
+
+/**
+ * Uses KTrader to convert a translated Filter Plugin Name to DesktopEntryName.
+ * @param name The translated plugin name. From Name= line in .desktop file.
+ * @return DesktopEntryName. The name of the .desktop file (less .desktop).
+ * QString::null if not found.
+ */
+QString FilterMgr::FilterNameToDesktopEntryName(const QString& name)
+{
+ if (name.isEmpty()) return QString::null;
+ KTrader::OfferList offers = KTrader::self()->query("KTTSD/FilterPlugin");
+ for (uint ndx = 0; ndx < offers.count(); ++ndx)
+ if (offers[ndx]->name() == name) return offers[ndx]->desktopEntryName();
+ return QString::null;
+}
+