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) # ![alt]((img1 img2 ... imgn))
    def handleMatch(self, m):
            
        alt=m.group(2)
        imgs=m.group(3).split()

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