Reviewed uses of type alias FileExtension, it belongs in more places

include/audacity/ImporterInterface.h

@@ -73,7 +73,7 @@ public:
    // import.  If a filename matches any of these extensions,
    // this importer will get first dibs on importing it.
    virtual FileExtensions GetSupportedExtensions() = 0;
-   virtual bool SupportsExtension(const wxString & extension) = 0;
+   virtual bool SupportsExtension(const FileExtension & extension) = 0;
 
    // Create the client that will be used to import a file.
    virtual ImporterClientInterface *CreateClient() = 0;

src/BatchCommands.cpp

@@ -631,7 +631,7 @@ bool MacroCommands::ApplySpecialCommand(
    }
 
    wxString filename;
-   wxString extension; // required for correct message
+   FileExtension extension; // required for correct message
    if (command == wxT("ExportWAV"))
       extension = wxT(".wav");
    else if (command == wxT("ExportOgg"))

src/export/Export.cpp

@@ -123,7 +123,7 @@ void ExportPlugin::SetDescription(const TranslatableString & description, int in
    mFormatInfos[index].mDescription = description;
 }
 
-void ExportPlugin::AddExtension(const wxString &extension,int index)
+void ExportPlugin::AddExtension(const FileExtension &extension, int index)
 {
    mFormatInfos[index].mExtensions.push_back(extension);
 }
@@ -201,7 +201,7 @@ bool ExportPlugin::GetCanMetaData(int index)
    return mFormatInfos[index].mCanMetaData;
 }
 
-bool ExportPlugin::IsExtension(const wxString & ext, int index)
+bool ExportPlugin::IsExtension(const FileExtension & ext, int index)
 {
    bool isext = false;
    for (int i = index; i < GetFormatCount(); i = GetFormatCount())
@@ -462,7 +462,7 @@ bool Exporter::Process(AudacityProject *project, bool selectedOnly, double t0, d
 }
 
 bool Exporter::Process(AudacityProject *project, unsigned numChannels,
-                       const wxChar *type, const wxString & filename,
+                       const FileExtension &type, const wxString & filename,
                        bool selectedOnly, double t0, double t1)
 {
    // Save parms
@@ -592,7 +592,7 @@ bool Exporter::GetFilename()
    mFormat = -1;
 
    wxString maskString;
-   wxString defaultFormat = mFormatName;
+   auto defaultFormat = mFormatName;
    if( defaultFormat.empty() )
       defaultFormat = gPrefs->Read(wxT("/Export/Format"),
                                          wxT("WAV"));
@@ -683,7 +683,7 @@ bool Exporter::GetFilename()
          }
       }
 
-      auto ext = mFilename.GetExt();
+      const auto ext = mFilename.GetExt();
       defext = mPlugins[mFormat]->GetExtension(mSubFormat).Lower();
 
       //

src/export/Export.h

@@ -69,7 +69,7 @@ public:
    int AddFormat();
    void SetFormat(const wxString & format, int index);
    void SetDescription(const TranslatableString & description, int index);
-   void AddExtension(const wxString &extension,int index);
+   void AddExtension(const FileExtension &extension, int index);
    void SetExtensions(FileExtensions extensions, int index);
    void SetMask(const wxString & mask, int index);
    void SetMaxChannels(unsigned maxchannels, unsigned index);
@@ -89,7 +89,7 @@ public:
    virtual unsigned GetMaxChannels(int index);
    virtual bool GetCanMetaData(int index);
 
-   virtual bool IsExtension(const wxString & ext, int index);
+   virtual bool IsExtension(const FileExtension & ext, int index);
 
    virtual bool DisplayOptions(wxWindow *parent, int format = 0);
    
@@ -185,12 +185,12 @@ public:
    virtual ~Exporter();
 
    void SetFileDialogTitle( const TranslatableString & DialogTitle );
-   void SetDefaultFormat( const wxString & Format ){ mFormatName = Format;};
+   void SetDefaultFormat( const FileExtension & Format ){ mFormatName = Format;};
 
    bool Process(AudacityProject *project, bool selectedOnly,
                 double t0, double t1);
    bool Process(AudacityProject *project, unsigned numChannels,
-                const wxChar *type, const wxString & filename,
+                const FileExtension &type, const wxString & filename,
                 bool selectedOnly, double t0, double t1);
 
    void DisplayOptions(int index);
@@ -227,7 +227,7 @@ private:
    void OnFilterChanged(wxFileCtrlEvent & evt);
 
 private:
-   wxString mFormatName;
+   FileExtension mFormatName;
    FileDialogWrapper *mDialog;
    TranslatableString mFileDialogTitle;
    AudacityProject *mProject;

src/export/ExportFFmpeg.cpp

@@ -214,13 +214,13 @@ ExportFFmpeg::ExportFFmpeg()
       switch(newfmt)
       {
       case FMT_M4A:
-         AddExtension(wxString(wxT("3gp")),fmtindex);
-         AddExtension(wxString(wxT("m4r")),fmtindex);
-         AddExtension(wxString(wxT("mp4")),fmtindex);
+         AddExtension(wxT("3gp"),fmtindex);
+         AddExtension(wxT("m4r"),fmtindex);
+         AddExtension(wxT("mp4"),fmtindex);
          break;
       case FMT_WMA2:
-         AddExtension(wxString(wxT("asf")),fmtindex);
-         AddExtension(wxString(wxT("wmv")),fmtindex);
+         AddExtension(wxT("asf"),fmtindex);
+         AddExtension(wxT("wmv"),fmtindex);
          break;
       default:
          break;

src/export/ExportFFmpegDialogs.h

@@ -48,7 +48,7 @@ struct ExposedFormat
 {
    FFmpegExposedFormat fmtid; //!< one of the FFmpegExposedFormat
    const wxChar *name;        //!< format name (internal, should be unique; if not - export dialog may show unusual behaviour)
-   const wxChar *extension;   //!< default extension for this format. More extensions may be added later via AddExtension.
+   const FileExtension extension;   //!< default extension for this format. More extensions may be added later via AddExtension.
    const wxChar *shortname;   //!< used to guess the format
    unsigned maxchannels;      //!< how many channels this format could handle
    const int canmetadata;           //!< !=0 if format supports metadata, AV_CANMETA any avformat version, otherwise version support added

src/export/ExportPCM.cpp

@@ -372,7 +372,7 @@ ExportPCM::ExportPCM()
       si.format = kFormats[i].format;
       for (si.channels = 1; sf_format_check(&si); si.channels++)
          ;
-      wxString ext = sf_header_extension(si.format);
+      auto ext = sf_header_extension(si.format);
 
       SetFormat(kFormats[i].name, format);
       SetCanMetaData(true, format);

src/import/Import.cpp

@@ -350,7 +350,7 @@ bool Importer::Import(const FilePath &fName,
    AudacityProject *pProj = GetActiveProject();
    auto cleanup = valueRestorer( pProj->mbBusyImporting, true );
 
-   wxString extension = fName.AfterLast(wxT('.'));
+   const FileExtension extension{ fName.AfterLast(wxT('.')) };
 
    // Always refuse to import MIDI, even though the FFmpeg plugin pretends to know how (but makes very bad renderings)
 #ifdef USE_MIDI

src/import/ImportGStreamer.cpp

@@ -345,7 +345,7 @@ GStreamerImportPlugin::GetSupportedExtensions()
    // We refresh the extensions each time this is called in case the
    // user had installed additional gstreamer plugins while Audacity
    // was active.
-   mExtensions.Empty();
+   mExtensions.clear();
 
    // Gather extensions from all factories that support audio
    {

src/import/ImportPlugin.h

@@ -173,7 +173,7 @@ public:
       return mFormatName;
    }
 
-   bool SupportsExtension(const wxString &extension)
+   bool SupportsExtension(const FileExtension &extension)
    {
       return mExtensions.Index(extension, false) != wxNOT_FOUND;
    }

src/menus/FileMenus.cpp

@@ -35,8 +35,7 @@
 
 // private helper classes and functions
 namespace {
-void DoExport
-(AudacityProject &project, const wxString & Format )
+void DoExport( AudacityProject &project, const FileExtension & Format )
 {
    auto &tracks = TrackList::Get( project );