def execute(self):
     "Comb button has been clicked."
     fileNames = polyfile.getFileOrDirectoryTypesUnmodifiedGcode(
         self.fileNameInput.value, interpret.getImportPluginFilenames(), self.fileNameInput.wasCancelled
     )
     for fileName in fileNames:
         writeOutput(fileName)

def getCarving( fileName ):
	"Get a carving for the file using an import plugin."
	importPluginFilenames = interpret.getImportPluginFilenames()
	for importPluginFilename in importPluginFilenames:
		fileTypeDot = '.' + importPluginFilename
		if fileName[ - len( fileTypeDot ) : ].lower() == fileTypeDot:
			importPluginsDirectoryPath = gcodec.getAbsoluteFolderPath( os.path.dirname( __file__ ), 'import_plugins' )
			pluginModule = gcodec.getModuleWithDirectoryPath( importPluginsDirectoryPath, importPluginFilename )
			if pluginModule != None:
				return pluginModule.getCarving( fileName )
	print( 'Could not find plugin to handle ' + fileName )
	return None

def writeOutput( fileName = '' ):
	"Chop a GNU Triangulated Surface file.  If no fileName is specified, chop the first GNU Triangulated Surface file in this folder."
	if fileName == '':
		unmodified = gcodec.getFilesWithFileTypesWithoutWords( interpret.getImportPluginFilenames() )
		if len( unmodified ) == 0:
			print( "There are no carvable files in this folder." )
			return
		fileName = unmodified[ 0 ]
	startTime = time.time()
	print( 'File ' + gcodec.getSummarizedFilename( fileName ) + ' is being chopped.' )
	chopGcode = getCraftedText( fileName )
	if chopGcode == '':
		return
	suffixFilename = fileName[ : fileName.rfind( '.' ) ] + '_chop.svg'
	suffixDirectoryName = os.path.dirname( suffixFilename )
	suffixReplacedBaseName = os.path.basename( suffixFilename ).replace( ' ', '_' )
	suffixFilename = os.path.join( suffixDirectoryName, suffixReplacedBaseName )
	gcodec.writeFileText( suffixFilename, chopGcode )
	print( 'The chopped file is saved as ' + gcodec.getSummarizedFilename( suffixFilename ) )
	print( 'It took ' + str( int( round( time.time() - startTime ) ) ) + ' seconds to chop the file.' )
	preferences.openWebPage( suffixFilename )