xoxo-sample-code

XOXO Sample Code

A whole bunch of open source (CC-by-2.0, Apache 2.0) sample code to read and write [xoxo files in Python (with Perl, PHP, ... to follow).

xoxo.py

# -*- coding: utf-8 -*-
"""xoxo.py - a utility module for transforming to and from the XHTMLOutlines format XOXO
toXOXO takes a Python datastructure (tuples, lists or dictionaries, arbitrarily nested) and returns a XOXO representation of it.
fromXOXO parses an XHTML file for a xoxo list and returns the structure
"""
__version__ = "0.8"
__date__ = "2004-10-05"
__author__ = "Kevin Marks <kmarks@technorati.com>"
__copyright__ = "Copyright 2004, Kevin marks & Technorati"
__license__ = "http://creativecommons.org/licenses/by/2.0/ CC-by-2.0], [http://www.apache.org/licenses/LICENSE-2.0 Apache 2.0"
__credits__ = """Tantek Çelik and Mark Pilgrim for data structure"""
__history__ = """
TODO: add <title> tag
TODO: add a proper profile link
0.8 work in unicode then render to utf-8
0.7 initial encoding support - just utf-8 for now
0.6 support the special behaviour for url properties  to/from <a>
0.5 fix some awkward side effects of whitespace and text outside our expected tags; simplify writing code
0.4 add correct XHTML headers so it validates
0.3 read/write version; fixed invlaid nested list generation;
0.1 first write-only version
 """

try:
    True, False
except NameError:
    True, False = not not 1, not 1
containerTags={'ol':False,'ul':False,'dl':False}
import sgmllib, urllib, urlparse, re
def makeXOXO(struct,className=None,depth=0):
    s=u''
    if isinstance(struct,list) or isinstance(struct,tuple):
        if className:
            s += u'<ol class="%s">' % className
        else:
            s+= u"<ol>"
    if isinstance(struct,dict):
        d=struct.copy()
        if d.has_key('url'):
            s+=u'<a href="%s" ' % d['url']
            text =  d.get('text',d.get('title',d['url']))
            for attr in ('title','rel','type'):
                if d.has_key(attr):
                    xVal = makeXOXO(d[attr],None,depth+1)
                    s +=u'%s="%s" ' % (attr,xVal)
                    del d[attr]
            s +=u'>%s</a>' % makeXOXO(text,None,depth+1)
            if d.has_key('text'):
                del d['text']
            del d['url']
        if len(d):
            s +=u"<dl>"
            for key,value in d.items():
                xVal = makeXOXO(value,None,depth+1)
                s+= u'<dt>%s</dt><dd>%s</dd>' % (key, xVal)
            s +=u"</dl>"
    elif type(struct) ==type((1,))or type(struct) ==type([1,]):
        for item in struct:
            s+=u"<li>" + makeXOXO(item,None,depth+1)+"</li>"
        s +=u"</ol>"
    elif type(struct) == type(u'unicode'):
        s+=struct
    else:
        if not type(struct)==type(' '):
            struct=str(struct)
        try:
            s+=unicode(struct,'utf-8')
        except:
            s+=unicode(struct,'windows_1252')
    return s
class xoxoParser(sgmllib.SGMLParser):
    def __init__(self):
        sgmllib.SGMLParser.__init__(self)
        self.structs=[]
        self.xostack=[]
        self.textstack=['']
    def normalize_attrs(self, attrs):
        attrs = [(k.lower(), sgmllib.charref.sub(lambda m: chr(int(m.groups()[0])), v).strip()) for k, v in attrs]
        attrs = [(k, k in ('rel','type') and v.lower() or v) for k, v in attrs]
        return attrs
    def pushStruct(self,struct):
        if type(struct) == type({}) and len(struct)==0 and len(self.structs) and type(self.structs[-1]) == type({}) and self.structs[-1].has_key('url'):
            self.xostack.append(self.structs[-1]) # put back the <a>-made one for extra def's
        else:
            self.structs.append(struct)
            self.xostack.append(self.structs[-1])
    def start_a(self,attrs):
        attrsD = dict(self.normalize_attrs(attrs))
        attrsD['url']= attrsD.get('href','')
        del attrsD['href']
        self.pushStruct(attrsD)
        self.textstack.append('')
    def end_a(self):
        val = self.textstack.pop()
        if val: 
            if self.xostack[-1].get('title','') == val:
                val=''
            if self.xostack[-1]['url'] == val:
                val=''
            if val:
                self.xostack[-1]['text']=val
        self.xostack.pop()
    def start_dl(self,attrs):
        self.pushStruct({})
    def end_dl(self):
        self.xostack.pop()
    def start_ol(self,attrs):
        self.pushStruct([])
    def end_ol(self):
        self.xostack.pop()
    def start_ul(self,attrs):
        self.pushStruct([])
    def end_ul(self):
        self.xostack.pop()
    def start_li(self,attrs):
        self.textstack.append('')
    def end_li(self):
        val = self.textstack.pop()
        if self.structs[-1] != self.xostack[-1]:
            val = self.structs.pop()
        self.xostack[-1].append(val)
    def start_dt(self,attrs):
        self.textstack.append('')
    def end_dt(self):
        pass
    def start_dd(self,attrs):
        self.textstack.append('')
    def end_dd(self):
        val = self.textstack.pop()
        key = self.textstack.pop()
        if self.structs[-1] != self.xostack[-1]:
            val = self.structs.pop()
        self.xostack[-1][key]=val
    def handle_data(self, text):
        if len(self.stack) and containerTags.get(self.stack[-1],True): #skip text not within an element
            self.textstack[-1] += text
def toXOXO(struct,addHTMLWrapper=False,cssUrl=''):
    if type(struct) ==type((1,))or type(struct) ==type([1,]):
        inStruct = struct
    else:
        inStruct = [struct]
    if addHTMLWrapper:
        s= '''<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head profile=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />'''
        if cssUrl:
            s+='<style type="text/css" >@import "%s";</style>' % cssUrl
        s+="</head><body>%s</body></html>" % makeXOXO(inStruct,'xoxo')
        return s.encode('utf-8')
    else:
        return makeXOXO(inStruct,'xoxo').encode('utf-8')
    
def fromXOXO(html):
    parser = xoxoParser()
    parser.feed(unicode(html,'utf-8'))
    #print parser.structs
    structs=[struct for struct in parser.structs if struct]
    #print structs
    while (len(structs) ==1 and type(structs)==type([1,])):
        structs=structs[0]
    return structs

testxoxo.py

# -*- coding: utf-8 -*-
"""testxoxo.py 
Unit tests for xoxo.py
This file tests the functions in xoxo.py 
The underlying model here is http://diveintopython.org/unit_testing/index.html 

run from command line with
python testxoxo.py -v
"""
import xoxo
reload(xoxo)
import unittest

class xoxoTestCases(unittest.TestCase):
    
    def testSimpleList(self):
        '''make a xoxo file from a list'''
        l = ['1','2','3']
        html = xoxo.toXOXO(l)
        self.assertEqual(html,'<ol class="xoxo"><li>1</li><li>2</li><li>3</li></ol>')
    def testNestedList(self):
        '''make a xoxo file from a list with a list in'''
        l = ['1',['2','3']]
        html = xoxo.toXOXO(l)
        self.assertEqual(html,'<ol class="xoxo"><li>1</li><li><ol><li>2</li><li>3</li></ol></li></ol>')

    def testDictionary(self):
        '''make a xoxo file from a dictionary'''
        d = {'test':'1','name':'Kevin'}
        html = xoxo.toXOXO(d)
        self.assertEqual(html,'<ol class="xoxo"><li><dl><dt>test</dt><dd>1</dd><dt>name</dt><dd>Kevin</dd></dl></li></ol>')

    def testSingleItem(self):
        '''make a xoxo file from a string'''
        l = "test"
        html = xoxo.toXOXO(l)
        self.assertEqual(html,'<ol class="xoxo"><li>test</li></ol>')

    def testWrapDiffers(self):
        '''make a xoxo file from a string with and without html wrapper and check they are different'''
        l = "test"
        html = xoxo.toXOXO(l)
        htmlwrap =  xoxo.toXOXO(l,addHTMLWrapper=True)
        self.failIfEqual(html,htmlwrap)

    def testWrapSingleItem(self):
        '''make a wrapped xoxo file from a string'''
        l = "test"
        html = xoxo.toXOXO(l,addHTMLWrapper=True)
        self.assertEqual(html,'''<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head profile=""></head><body><ol class="xoxo"><li>test</li></ol></body></html>''')

    def testDictionaryRoundTrip(self):
        ''' make a dictionary into a xoxo file and back again; check it is the same'''
        d = {'test':'1','name':'Kevin'}
        html = xoxo.toXOXO(d)
        newd = xoxo.fromXOXO(html)
        self.assertEqual(d,newd)
        
    def testListRoundTrip(self):
        ''' make a list into a xoxo file and back again; check it is the same'''
        l = ['3','2','1']
        html = xoxo.toXOXO(l)
        newdl= xoxo.fromXOXO(html)
        self.assertEqual(l,newdl)
    def testListofDictsRoundTrip(self):
        ''' make a list of Dicts into a xoxo file and back again; check it is the same'''
        l = ['3',{'a':'2'},{'b':'1','c':'4'}]
        html = xoxo.toXOXO(l)
        newdl= xoxo.fromXOXO(html)
        self.assertEqual(l,newdl)
    def testListofListsRoundTrip(self):
        ''' make a list of Lists into a xoxo file and back again; check it is the same'''
        l = ['3',['a','2'],['b',['1',['c','4']]]]
        html = xoxo.toXOXO(l)
        newdl= xoxo.fromXOXO(html)
        self.assertEqual(l,newdl)
    def testDictofListsRoundTrip(self):
        ''' make a dict with lists in into a xoxo file and back again; check it is the same'''
        d = {'test':['1','2'],
        'name':'Kevin',
        'nestlist':['a',['b','c']],
        'nestdict':{'e':'6','f':'7'}}
        html = xoxo.toXOXO(d)
        newd = xoxo.fromXOXO(html)
        self.assertEqual(d,newd)

    def testXOXOjunkInContainers(self):
        '''make sure text outside <li> etc is ignored'''
        d=xoxo.fromXOXO('<ol>bad<li><dl>worse<dt>good</dt><dd>buy</dd> now</dl></li></ol>')
        self.assertEqual(d,{'good': 'buy'})
    def testXOXOjunkInElements(self):
        '''make sure text within <li> but outside a subcontainer is ignored'''
        l=xoxo.fromXOXO('<ol><li>bad<dl><dt>good</dt><dd>buy</dd></dl>worse</li><li>bag<ol><li>OK</li></ol>fish</li></ol>')
        self.assertEqual(l,[{'good': 'buy'},['OK']])
    def testXOXOWithSpacesAndNewlines(self):
        '''unmung some xoxo with spaces in and check result is right'''
        xoxoSample= '''<ol class='xoxo'> 
  <li>
    <dl>
        <dt>text</dt>
        <dd>item 1</dd>
        <dt>description</dt>
        <dd> This item represents the main point we're trying to make.</dd>
        <dt>url</dt>
        <dd>http://example.com/more.xoxo</dd>
        <dt>title</dt>
        <dd>title of item 1</dd>
        <dt>type</dt>
        <dd>text/xml</dd>
        <dt>rel</dt>
        <dd>help</dd>
    </dl>
  </li>
</ol>'''
        d = xoxo.fromXOXO(xoxoSample)
        d2={'text':'item 1',
            'description':" This item represents the main point we're trying to make.",
            'url':'http://example.com/more.xoxo',
            'title':'title of item 1',
            'type':'text/xml',
            'rel':'help'
            }
        xoxoAgain = xoxo.toXOXO(d)
        self.assertEqual(d,d2)
        #this needs a smarter whitespace-sensitive comparison
        #self.assertEqual(xoxoSample,xoxoAgain)

    def testSpecialAttributeDecoding(self):
        '''unmung some xoxo with <a href=' rel= etc in and check result is right'''
        xoxoSample= '''<ol class='xoxo'> 
  <li>
    <dl>
        <dt>text</dt>
        <dd>item 1</dd>
        <dt>url</dt>
        <dd>http://example.com/more.xoxo</dd>
        <dt>title</dt>
        <dd>title of item 1</dd>
        <dt>type</dt>
        <dd>text/xml</dd>
        <dt>rel</dt>
        <dd>help</dd>
    </dl>
  </li>
</ol>'''
        d = xoxo.fromXOXO(xoxoSample)
        smartxoxoSample= '''<ol class='xoxo'> 
  <li><a href="http://example.com/more.xoxo"
         title="title of item 1"
         type="text/xml"
         rel="help">item 1</a> 
<!-- note how the "text" property is simply the contents of the <a> element -->
  </li>
</ol>'''
        d2 = xoxo.fromXOXO(smartxoxoSample)
        self.assertEqual(d,d2)
    def testSpecialAttributeAndDLDecoding(self):
        '''unmung some xoxo with <a href=' rel= etc in plus a <dl> in the same item and check result is right'''
        xoxoSample= '''<ol class="xoxo"> 
  <li>
    <dl>
        <dt>text</dt>
        <dd>item 1</dd>
        <dt>description</dt>
        <dd> This item represents the main point we're trying to make.</dd>
        <dt>url</dt>
        <dd>http://example.com/more.xoxo</dd>
        <dt>title</dt>
        <dd>title of item 1</dd>
        <dt>type</dt>
        <dd>text/xml</dd>
        <dt>rel</dt>
        <dd>help</dd>
    </dl>
  </li>
</ol>'''
        d = xoxo.fromXOXO(xoxoSample)
        smartxoxoSample= '''<ol class="xoxo"> 
  <li><a href="http://example.com/more.xoxo"
         title="title of item 1"
         type="text/xml"
         rel="help">item 1</a> 
<!-- note how the "text" property is simply the contents of the <a> element -->
      <dl>
        <dt>description</dt>
          <dd> This item represents the main point we're trying to make.</dd>
      </dl>
  </li>
</ol>'''
        d2 = xoxo.fromXOXO(smartxoxoSample)
        self.assertEqual(d,d2)
    def testSpecialAttributeEncode(self):
        '''check it makes an <a href with a url parameter'''
        d={'url':'http://example.com/more.xoxo','title':'sample url','type':"text/xml",'rel':'help','text':'an example'}
        html=xoxo.toXOXO(d)
        expectedHTML= '<ol class="xoxo"><li><a href="http://example.com/more.xoxo" title="sample url" rel="help" type="text/xml" >an example</a></li></ol>' 
        self.assertEqual(html,expectedHTML)
        
    def testSpecialAttributeRoundTripFull(self):
        '''check it makes an <a href with a url parameter'''
        d={'url':'http://example.com/more.xoxo','title':'sample url','type':"text/xml",'rel':'help','text':'an example'}
        html=xoxo.toXOXO(d)
        self.assertEqual(d,xoxo.fromXOXO(html))
    def testSpecialAttributeRoundTripNoText(self):
        '''check it makes an <a href with a url parameter and no text attribute'''
        d={'url':'http://example.com/more.xoxo','title':'sample url','type':"text/xml",'rel':'help'}
        html=xoxo.toXOXO(d)
        self.assertEqual(d,xoxo.fromXOXO(html))
    def testSpecialAttributeRoundTripNoTextOrTitle(self):
        '''check it makes an <a href with a url parameter and no text or title attribute'''
        d={'url':'http://example.com/more.xoxo'}
        html=xoxo.toXOXO(d)
        self.assertEqual(d,xoxo.fromXOXO(html))
    def testUnicodeRoundtrip(self):
        '''check unicode characters can go to xoxo and back'''
        src=unicode('Tantek Çelik and a snowman ?','utf-8')
        html = html=xoxo.toXOXO(src)
        self.assertEqual(src,xoxo.fromXOXO(html))
if __name__ == "__main__":
    unittest.main()
else:
    runner = unittest.TextTestRunner()
    suite = unittest.makeSuite(xoxoTestCases,'test')
    runner.run(suite)