# -*- coding: iso-8859-1 -*-
"""
    MoinMoin - ImageLink Macro

    PURPOSE:
        This macro is used to set a link as WikiName for an attached image. Optional the size of the
	image could be adjusted. If no WikiName is given the attachment is linked to the image itselfs.

    CALLING SEQUENCE:
        [[ImageLink(attachment,[WikiName],[width=width,[height=heigt]])]]

    INPUTS:
        attachment:image name of attachment
	WikiName: the page to set the link to

    KEYWORD PARAMETERS:
        width: width of the embedded image
	height: height of the embedded image

    EXAMPLE:
      [[ImageLink(plot.gif,FrontPage,width=20,height=20)]]
      [[ImageLink(plot.gif,FrontPage,height=20)]]
      [[ImageLink(plot.gif,FrontPage)]]
      [[ImageLink(plot.gif,width=20,height=20)]]
      [[ImageLink(plot.gif,width=20)]]


    PROCEDURE:
      This routine requires attachment enabled. If the attachment isn't downloaded at all
      the attachment line is shown.
      If you give only one image size argument e.g. width only the other one is calculated

      It must be in "MoinMoin/macro"

      Please remove the version number from the file name!

    MODIFICATION HISTORY:
        @copyright: 2004 by Reimar Bauer (R.Bauer@fz-juelich.de)
        @license: GNU GPL, see COPYING for details.

	Marcin Zalewski:
	    Some things that were causing problems on my wiki are changed
            (wikiutil.link_tag and macro.formatter.pagelink implemented)

        Marcin Zalewski:
            Added title attribute to the created link. One could generalize that to
            add arbitrary attributes.

            One could also add class attributes to <a> and/or
            <img> elements. I do not see the need for such modifications. If however this is
            to be done in the future one would need to add 'html_class' key to the kw dictionary
            with a corresponding value to add class to <img> element. To add class to <a> element
            one needs to add 'css_class' key with a corresponding value to the dictionary passed to
            pagelink call.
       Reimar Bauer:
            2004-12-23 Adopted to MoinMoin Version 1.3.1-1
	    2004-12-23 SYNTAX CHANGE Version 1.3.1-2
	               width and height and probably other keywords must be called as keywords (e.g. height=20)
	    2004-12-31 Version 1.3.1-3 code clean up


"""

from MoinMoin.action import AttachFile
from MoinMoin import wikiutil, config
import os,string


def execute(macro, text):

   kw ={} # create a dictionary for the formatter.image call

   if text:
      args=text.split(',')
   else:
      args=[]



   number_args=len(args)
   count=0
   for a in args :
     if (a.find('=') > -1):
        count=count+1
	key=a.split('=')

	kw[str(key[0])]=wikiutil.escape(string.join(key[1],''), quote=1)

   number_args=number_args-count

   if (number_args < 1):
      return macro.formatter.sysmsg('Not enough arguments to ImageLink macro')


   attname=wikiutil.taintfilename(macro.formatter.text(args[0]))
   wikiname=args[1]
   current_pagename=macro.formatter.page.page_name
   kw['src']=AttachFile.getAttachUrl(current_pagename,attname,macro.request)
   attachment_path = os.path.join(AttachFile.getAttachDir(macro.request,current_pagename), attname)

   if not os.path.exists(attachment_path):
      import urllib
      linktext = macro.request.getText('Upload new attachment "%(filename)s"')
      return wikiutil.link_tag(macro.request,
                               '%s?action=AttachFile&amp;rename=%s' %
                               (wikiutil.quoteWikinameFS(current_pagename),
                                urllib.quote_plus(attname)),
                               linktext % {'filename': attname})

   if (number_args == 1):
       kw['title']=attname
       kw['alt']=attname
       image_link=macro.formatter.image(**kw)
       return macro.formatter.url(1,kw['src'] )+image_link +macro.formatter.url(0)

   if (number_args == 2 ):
       kw['title']=wikiname
       kw['alt']=wikiname
       image_link=macro.formatter.image(**kw)

       return macro.formatter.pagelink(1,wikiname)+image_link+macro.formatter.url(0)