#!/usr/bin/python
"""
Copyright (C) 2006,2009 Emmanuel Gorse, e.gorse@gmail.com

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
"""

from parsers import LabelParser
from xmotoTools import getValue, setOrDelBool, setOrDelBitmap
from xmotoTools import delWithoutExcept, updateInfos
from inkex import addNS

class DefaultValues:
    def __init__(self):
        self.defaultValues = {}
        self.svg = None
        self.useDefault = True

    def addElementLabel(self, label):
        """ load default values only for new elements with no xmoto_label
        """
        if len(label.keys()) != 0:
            self.useDefault = False

    def load(self, svg):
        self.svg = svg
        node = self.svg.getMetaDataNode()
        if node is not None:
            label = node.get(addNS('default_xmoto_label', 'xmoto'), '')
            self.defaultValues = LabelParser().parse(label)

    def unload(self, label):
        updateInfos(self.defaultValues, label)

        if len(self.defaultValues.keys()) == 0:
            return

        defaultLabel = LabelParser().unparse(self.defaultValues)
        node = self.svg.getAndCreateMetadataNode()
        node.set(addNS('default_xmoto_label', 'xmoto'), defaultLabel)

    def get(self, dictValues, namespace, name=None, default=None):
        value = getValue(dictValues, namespace, name, None)
        if value is None:
            if self.useDefault == True:
                value = getValue(self.defaultValues, namespace, name, None)
                if value is None:
                    return default
                else:
                    return value
            else:
                return default
        else:
            return value

    def setOrDelBool(self, _dict, namespace, widget, key):
        if setOrDelBool(_dict[namespace], widget, key) == False:
            delWithoutExcept(self.defaultValues, key, namespace)

    def setOrDelBitmap(self, _dict, namespace, key, button):
        if setOrDelBitmap(_dict[namespace], key, button) == False:
            delWithoutExcept(self.defaultValues, key, namespace)
