def makeExtension(configs=None) :
    return GalleryExtension()

from markdown.inlinepatterns import Pattern
import markdown, urllib

class GalleryPattern(Pattern):
    def __init__(self,md):
        Pattern.__init__(self,'!\\[(.*?)\\]\(\((.*?)\)\)',md) #
    def handleMatch(self, m):
            
        alt=m.group(2)
        imgs=m.group(3).split()

        ul = markdown.util.etree.Element('ul')
        ul.attrib["class"]='gallery'
        for img in imgs:
            li = markdown.util.etree.Element('li')
            ul.append(li)
            anch = markdown.util.etree.Element('a')
            anch.attrib["href"]=img
            anch.attrib["target"]="_blank"
            anch.attrib["onclick"]='loadImg("%s",this);return false;' % (img)
            li.append(anch)
            
            img_el = markdown.util.etree.Element('img')
            anch.append(img_el)
            img_el.attrib["src"]=img
            img_el.attrib["alt"]=alt
            
        return ul
        
class GalleryExtension(markdown.Extension):
    def extendMarkdown(self, md, md_globals):
        md.inlinePatterns.add('gallery', GalleryPattern(md), '<image_link')