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#!/usr/bin/env python
#
#   Library:    pyflowctrl
#   Module:     htmlspecials2
#   Dependency:    core3
#   Examples:   
#
#   links: http://htmlhelp.com/reference/html40/entities/special.html
#

import re
from core3 import EmptyStream, Stream, Process
from core3 import WAITING, PROCESSING

class HTMLSpecialsRemover(Process):
    ''' HTML Specials Remover '''
    def __init__(self, selectors={}):
        ''' __init__  '''
        super(HTMLSpecialsRemover, self).__init__()
        self.io = { 
            'input': Stream(),
            'output': Stream(),
        }
        
    def main(self):
        while True:
            try:
                (path, data) = self.io['input'].get()
            except EmptyStream:
                yield WAITING
                continue

            data = data.replace('\n', '')
            data = data.replace('\r', '')
            data = data.replace('\t', '')
            data = data.replace('"', '"')
            data = data.replace('&lt;', '<')
            data = data.replace('&gt;', '>')
            data = data.replace('&amp;', '&')
            data = data.replace('&nbsp;', ' ')
            data = data.replace('&laquo;', '')
            data = data.replace('&raquo;', '')
            
            self.io['output'].put((path, data))
            yield PROCESSING