from genshi.builder import tag

from trac.wiki.macros import WikiMacroBase

class AstahMacro(WikiMacroBase):
    """ 
    astah share Embed.
    
    Usage - How to embed an astah file:
    [[Astah(http://example.com/astahshare/embed/a/123)]]
    [[Astah(http://example.com/astahshare/embed/a/123,600,480)]]

    Usage - How to embed a diagram:
    [[Astah(http://example.com/astahshare/embed/d/456)]]
    [[Astah(http://example.com/astahshare/embed/d/456,800,600)]]
    """

    revision = "$Rev$"
    url = "$URL$"

    def expand_macro(self, formatter, name, args):
        arguments = [x.strip() for x in args.split(',')]
        src = arguments[0]
        
        if src.find('/astahshare/embed/') == -1:
            return args
        
        width = len(arguments) > 1 and arguments[1] or 480
        height = len(arguments) > 2 and arguments[2] or 320
        return tag.iframe(width=width,height=height,frameborder='0',src=src)