get rid of supportsSearching() by using a proper feature

svn path=/trunk/playground/graphics/okular/; revision=624587

core/document.cpp

@@ -1079,7 +1079,7 @@ bool Document::isAllowed( Permissions flags ) const
 
 bool Document::supportsSearching() const
 {
-    return d->m_generator ? d->m_generator->supportsSearching() : false;
+    return d->m_generator ? d->m_generator->hasFeature( Generator::TextExtraction ) : false;
 }
 
 bool Document::supportsPageSizes() const
@@ -1468,7 +1468,7 @@ bool Document::searchText( int searchID, const QString & text, bool fromStart, Q
                                SearchType type, bool moveViewport, const QColor & color, bool noDialogs )
 {
     // safety checks: don't perform searches on empty or unsearchable docs
-    if ( !d->m_generator || !d->m_generator->supportsSearching() || d->m_pagesVector.isEmpty() )
+    if ( !d->m_generator || !d->m_generator->hasFeature( Generator::TextExtraction ) || d->m_pagesVector.isEmpty() )
         return false;
 
     // if searchID search not recorded, create new descriptor and init params

core/generator.cpp

@@ -75,11 +75,6 @@ bool Generator::isAllowed( Permissions ) const
     return true;
 }
 
-bool Generator::supportsSearching() const
-{
-    return false;
-}
-
 void Generator::rotationChanged( Rotation, Rotation )
 {
 }

core/generator.h

@@ -140,6 +140,7 @@ class OKULAR_EXPORT Generator : public QObject
     public:
         enum GeneratorFeature
         {
+            TextExtraction,    ///< Whether the Generator can extract text from the document in the form of TextPage's
             ReadRawData        ///< Whether the Generator can read a document directly from its raw data.
         };
 
@@ -248,11 +249,6 @@ class OKULAR_EXPORT Generator : public QObject
          */
         virtual bool isAllowed( Permissions action ) const;
 
-        /**
-         * This method returns whether the generator supports searching. Default is false.
-         */
-        virtual bool supportsSearching() const;
-
         /**
          * This method is called when the orientation has been changed by the user.
          */

core/textdocumentgenerator.cpp

@@ -308,9 +308,15 @@ void TextDocumentGenerator::generateSyncTextPage( Okular::Page * page )
     page->setTextPage( d->createTextPage( page->number() ) );
 }
 
-bool TextDocumentGenerator::supportsSearching() const
+bool TextDocumentGenerator::hasFeature( GeneratorFeature feature ) const
 {
-    return true;
+    switch ( feature )
+    {
+        case TextExtraction:
+            return true;
+        default: ;
+    }
+    return false;
 }
 
 bool TextDocumentGenerator::print( KPrinter& printer )

core/textdocumentgenerator.h

@@ -98,7 +98,7 @@ class OKULAR_EXPORT TextDocumentGenerator : public Generator
         void generatePixmap( Okular::PixmapRequest * request );
         void generateSyncTextPage( Okular::Page * page );
 
-        bool supportsSearching() const;
+        bool hasFeature( GeneratorFeature feature ) const;
 
         // [INHERITED] print document using already configured kprinter
         bool print( KPrinter& printer );

generators/chm/generator_chm.cpp

@@ -364,9 +364,15 @@ void CHMGenerator::generateSyncTextPage( Okular::Page * page )
     syncLock.unlock();
 }
 
-bool CHMGenerator::supportsSearching() const
+bool CHMGenerator::hasFeature( GeneratorFeature feature ) const
 {
-    return true;
+    switch ( feature )
+    {
+        case TextExtraction:
+            return true;
+        default: ;
+    }
+    return false;
 }
 
 QVariant CHMGenerator::metaData( const QString &key, const QVariant &option ) const

generators/chm/generator_chm.h

@@ -43,7 +43,7 @@ class CHMGenerator : public Okular::Generator
 
         void generateSyncTextPage( Okular::Page * page );
 
-        bool supportsSearching() const;
+        bool hasFeature( GeneratorFeature feature ) const;
 
         QVariant metaData( const QString & key, const QVariant & option ) const;
 

generators/dvi/generator_dvi.cpp

@@ -369,6 +369,17 @@ const Okular::DocumentSynopsis *DviGenerator::generateDocumentSynopsis()
     return m_docSynopsis;
 }
 
+bool DviGenerator::hasFeature( GeneratorFeature feature ) const
+{
+    switch ( feature )
+    {
+        case TextExtraction:
+            return true;
+        default: ;
+    }
+    return false;
+}
+
 void DviGenerator::loadPages( QVector< Okular::Page * > &pagesVector, int orientation )
 {
     QSize pageRequiredSize;

generators/dvi/generator_dvi.h

@@ -40,8 +40,7 @@ class DviGenerator : public Okular::Generator
         // table of contents
         const Okular::DocumentSynopsis *generateDocumentSynopsis();
 
-        // searching
-        bool supportsSearching() const { return true; };
+        bool hasFeature( GeneratorFeature feature ) const;
 
    private:
         double m_resolution;

generators/poppler/generator_pdf.cpp

@@ -769,11 +769,16 @@ bool PDFGenerator::print( KPrinter& printer )
 
 bool PDFGenerator::hasFeature( GeneratorFeature feature ) const
 {
+    switch ( feature )
+    {
+        case TextExtraction:
 #ifdef HAVE_POPPLER_HEAD
-    return feature == Okular::Generator::ReadRawData;
-#else
-    return false;
+        case ReadRawData:
 #endif
+            return true;
+        default: ;
+    }
+    return false;
 }
 
 QVariant PDFGenerator::metaData( const QString & key, const QVariant & option ) const

generators/poppler/generator_pdf.h

@@ -75,8 +75,6 @@ class PDFGenerator : public Okular::Generator, public Okular::ConfigInterface
         void generatePixmap( Okular::PixmapRequest * request );
         void generateSyncTextPage( Okular::Page * page );
 
-        bool supportsSearching() const { return true; };
-
         // [INHERITED] print page using an already configured kprinter
         bool print( KPrinter& printer );