##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
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# 
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations.  Specific
# attributions are listed in the accompanying credits file.
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##############################################################################

import re, ST, STDOM
from string import split, join, replace, expandtabs, strip, find

from DocumentClass import *

class StructuredTextImage(StructuredTextMarkup):
    "A simple embedded image"

class DocumentWithImages(DocumentClass):   
    """

    """


    text_types = [
       'doc_img',
       ] + DocumentClass.text_types


    def doc_img(
        self, s,
        expr1=re.compile('\"([ _a-zA-Z0-9*.:/;,\-\n\~]+)\":img:([a-zA-Z0-9\-.:/;,\n\~]+)').search,
        expr2=re.compile('\"([ _a-zA-Z0-9*.:/;,\-\n\~]+)\":img:([a-zA-Z0-9\-.:/;,\n\~]+):([a-zA-Z0-9\-.:/;,\n\~]+)').search
        ):


        r = expr2(s)
        if r:
            startt, endt = r.span(1)
            startk, endk = r.span(2)
            starth, endh = r.span(3)
            start, end = r.span()
            return (StructuredTextImage(s[startt:endt], href=s[starth:endh], key=s[startk:endk]), 
                    start, end)

      
        else:
            
            r=expr1(s)

            if r:
                startt, endt = r.span(1)
                starth, endh = r.span(2)
                start, end = r.span()
                return (StructuredTextImage(s[startt:endt], href=s[starth:endh]),
                        start, end)

            return None