#!/usr/bin/env python
"""
Copyright (C) 2007 Rob Antonishen; rob.antonishen@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

"""
import inkex, os

class Restack(inkex.Effect):
    def __init__(self):
        inkex.Effect.__init__(self)
        self.OptionParser.add_option("-d", "--direction",
                        action="store", type="string", 
                        dest="direction", default="tb",
                        help="direction to restack")
        self.OptionParser.add_option("-x", "--xanchor",
                        action="store", type="string", 
                        dest="xanchor", default="m",
                        help="horizontal point to compare")
        self.OptionParser.add_option("-y", "--yanchor",
                        action="store", type="string", 
                        dest="yanchor", default="m",
                        help="vertical point to compare")
    def effect(self):
        if len( self.selected ) > 0:
            objlist = []
            svg = self.document.getElementsByTagName( 'svg' )[ 0 ]
            for id, node in self.selected.iteritems():
                # get the bounding box
                attrs = { 'x' : 0, 'y' : 0, 'width' : 0, 'height' : 0 }
                file = self.args[ -1 ]
                for query in attrs.keys():
                    f = os.popen( "inkscape --query-%s --query-id=%s %s" % ( query, id, file ) )
                    attrs[ query ] = float( f.read() )
                    f.close()

                # calc the center coords
                if self.options.xanchor == "l":
                    cx = attrs["x"]
                elif self.options.xanchor == "r":
                    cx = attrs["x"] + attrs["width"]
                else:  # middle
                    cx = attrs["x"] + attrs["width"] / 2

                if self.options.yanchor == "t":
                    cy = attrs["y"]
                elif self.options.yanchor == "b":
                    cy = attrs["y"] + attrs["height"]
                else:  # middle
                    cy = attrs["y"] + attrs["height"] / 2
				
                #direction chosen
                if self.options.direction == "tb":
               	    objlist.append([cy,id])
                elif self.options.direction == "bt":
               	    objlist.append([-cy,id])
                elif self.options.direction == "lr":
               	    objlist.append([cx,id])
                else:  #right to left
               	    objlist.append([-cx,id])
                
            objlist.sort()
            for item in objlist:
                #inkex.debug( '%s : %s ' % ( item[0], item[1] ) )
                svg.appendChild( self.selected[item[1]])

e = Restack()
e.affect()