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# Copyright (c) 2001 Chris Withers
#
# This Software is released under the MIT License:
# http://www.opensource.org/licenses/mit-license.html
# See license.txt for more details.
#
# $Id: html2text.py,v 1.7 2002/12/17 16:56:17 fresh Exp $
import sgmllib
from string import lower, replace, split, join
class HTML2Text(sgmllib.SGMLParser):
from htmlentitydefs import entitydefs # replace entitydefs from sgmllib
def __init__(self, ignore_tags=(), indent_width=4, page_width=80):
sgmllib.SGMLParser.__init__(self)
self.result = ""
self.indent = 0
self.ol_number = 0
self.page_width=page_width
self.inde_width=indent_width
self.lines=[]
self.line=[]
self.ignore_tags = ignore_tags
def add_text(self,text):
# convert text into words
words = split(replace(text,'\n',' '))
self.line.extend(words)
def add_break(self):
self.lines.append((self.indent,self.line))
self.line=[]
def generate(self):
# join lines with indents
indent_width = self.inde_width
page_width = self.page_width
out_paras=[]
for indent,line in self.lines+[(self.indent,self.line)]:
i=indent*indent_width
indent_string = i*' '
line_width = page_width-i
out_para=''
out_line=[]
len_out_line=0
for word in line:
len_word = len(word)
if len_out_line+len_word<line_width:
out_line.append(word)
len_out_line = len_out_line + len_word
else:
out_para = out_para + indent_string + join(out_line, ' ') + '\n'
out_line=[word]
len_out_line=len_word
out_para = out_para + indent_string + join(out_line, ' ')
out_paras.append(out_para)
self.result = join(out_paras,'\n\n')
def mod_indent(self,i):
self.indent = self.indent + i
if self.indent < 0:
self.indent = 0
def handle_data(self, data):
if data:
self.add_text(data)
def unknown_starttag(self, tag, attrs):
""" Convert HTML to something meaningful in plain text """
tag = lower(tag)
if tag not in self.ignore_tags:
if tag[0]=='h' or tag in ['br','pre','p','hr']:
# insert a blank line
self.add_break()
elif tag =='img':
# newline, text, newline
src = ''
for k, v in attrs:
if lower(k) == 'src':
src = v
self.add_break()
self.add_text('Image: ' + src)
elif tag =='li':
self.add_break()
if self.ol_number:
# num - text
self.add_text(str(self.ol_number) + ' - ')
self.ol_number = self.ol_number + 1
else:
# - text
self.add_text('- ')
elif tag in ['dd','dt']:
self.add_break()
# increase indent
self.mod_indent(+1)
elif tag in ['ul','dl','ol']:
# blank line
# increase indent
self.mod_indent(+1)
if tag=='ol':
self.ol_number = 1
def unknown_endtag(self, tag):
""" Convert HTML to something meaningful in plain text """
tag = lower(tag)
if tag not in self.ignore_tags:
if tag[0]=='h' or tag in ['pre']:
# newline, text, newline
self.add_break()
elif tag =='li':
self.add_break()
elif tag in ['dd','dt']:
self.add_break()
# descrease indent
self.mod_indent(-1)
elif tag in ['ul','dl','ol']:
# blank line
self.add_break()
# decrease indent
self.mod_indent(-1)
self.ol_number = 0
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