Removing unused obsolete code from wxFileDialog

We don't need workaround for macOS earlier than 10.6 any longer.

include/wx/osx/filedlg.h

@@ -74,11 +74,6 @@ public:
 
     // implementation only
 
-#if wxOSX_USE_COCOA
-    // returns true if the file can be shown as active
-    bool CheckFile( const wxString& filename );
-#endif
-
 protected:
     // not supported for file dialog, RR
     virtual void DoSetSize(int WXUNUSED(x), int WXUNUSED(y),

src/osx/cocoa/filedlg.mm

@@ -45,126 +45,6 @@
 // implementation
 // ============================================================================
 
-// Open Items:
-// - parameter support for descending into packages as directories (setTreatsFilePackagesAsDirectories)
-// - as setAllowedFileTypes is only functional for NSOpenPanel on 10.6+, on earlier systems, the file
-// type choice will not be shown, but all possible file items will be shown, if a popup must be working
-// then the delegate method - (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename will have to
-// be implemented
-
-@interface wxOpenPanelDelegate : NSObject <NSOpenSavePanelDelegate>
-{
-    wxFileDialog* _dialog;
-}
-
-- (wxFileDialog*) fileDialog;
-- (void) setFileDialog:(wxFileDialog*) dialog;
-
-- (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename;
-
-@end
-
-@implementation wxOpenPanelDelegate
-
-- (id) init
-{
-    if ( self = [super init] )
-    {
-        _dialog = NULL;
-    }
-    return self;
-}
-
-- (wxFileDialog*) fileDialog
-{
-    return _dialog;
-}
-
-- (void) setFileDialog:(wxFileDialog*) dialog
-{
-    _dialog = dialog;
-}
-
-- (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename
-{
-    BOOL showObject = YES;
-
-    wxGCC_WARNING_SUPPRESS(deprecated-declarations)
-
-    NSString* resolvedLink = [[NSFileManager defaultManager] pathContentOfSymbolicLinkAtPath:filename];
-    if ( resolvedLink != nil )
-        filename = resolvedLink;
-
-    NSDictionary* fileAttribs = [[NSFileManager defaultManager]
-                                 fileAttributesAtPath:filename traverseLink:YES];
-
-    wxGCC_WARNING_RESTORE(deprecated-declarations)
-
-    if (fileAttribs)
-    {
-        // check for packages
-        if ([NSFileTypeDirectory isEqualTo:[fileAttribs objectForKey:NSFileType]])
-        {
-            if ([[NSWorkspace sharedWorkspace] isFilePackageAtPath:filename] == NO)
-                showObject = YES;    // it's a folder, OK to show
-            else
-            {
-                // it's a packaged directory, apply check
-                wxCFStringRef filecf([filename retain]);
-                showObject = _dialog->CheckFile(filecf.AsString());  
-            }
-        }
-        else
-        {
-            // the code above only solves links, not aliases, do this here:
-            
-            NSString* resolvedAlias = nil;
-            
-            CFURLRef url = CFURLCreateWithFileSystemPath (kCFAllocatorDefault, 
-                                                          (CFStringRef)filename, 
-                                                          kCFURLPOSIXPathStyle,
-                                                          NO); 
-            if (url != NULL) 
-            {
-                FSRef fsRef; 
-                if (CFURLGetFSRef(url, &fsRef)) 
-                {
-                    Boolean targetIsFolder, wasAliased;
-                    OSErr err = FSResolveAliasFile (&fsRef, true, &targetIsFolder, &wasAliased);
-                    
-                    if ((err == noErr) && wasAliased) 
-                    {
-                        CFURLRef resolvedUrl = CFURLCreateFromFSRef(kCFAllocatorDefault,  &fsRef);
-                        if (resolvedUrl != NULL) 
-                        {
-                            resolvedAlias = (NSString*) CFURLCopyFileSystemPath(resolvedUrl,
-                                                                               kCFURLPOSIXPathStyle); 
-                            CFRelease(resolvedUrl);
-                        }
-                    } 
-                }
-                CFRelease(url);
-            }
-
-            if (resolvedAlias != nil) 
-            {
-                // recursive call
-                [resolvedAlias autorelease];
-                showObject = [self panel:sender shouldShowFilename:resolvedAlias];
-            }
-            else
-            {
-                wxCFStringRef filecf([filename retain]);
-                showObject = _dialog->CheckFile(filecf.AsString());  
-            }
-        }
-    }
-
-    return showObject;    
-}
-
-@end
-
 wxIMPLEMENT_CLASS(wxFileDialog, wxFileDialogBase);
 
 void wxFileDialog::Init()
@@ -425,21 +305,6 @@ void wxFileDialog::OnFilterSelected( wxCommandEvent &WXUNUSED(event) )
     DoOnFilterSelected( m_filterChoice->GetSelection() );
 }
 
-bool wxFileDialog::CheckFile( const wxString& filename )
-{
-    if ( m_currentExtensions.GetCount() == 0 )
-        return true;
-    
-    wxString ext = filename.AfterLast('.').Lower();
-    
-    for ( size_t i = 0; i < m_currentExtensions.GetCount(); ++i )
-    {
-        if ( ext == m_currentExtensions[i] )
-            return true;
-    }
-    return false;
-}
-
 void wxFileDialog::SetupExtraControls(WXWindow nativeWindow)
 {
     NSSavePanel* panel = (NSSavePanel*) nativeWindow;