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path.py
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Sun, Sep 1, 11:14

path.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
""" This super class can be used to represent all svg path types.
"""
# Copyright (C) University of Basel 2019 {{{1
#
# 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 3 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, see <https://www.gnu.org/licenses/> 1}}}
__author__ = "Christian Steiner"
__maintainer__ = __author__
__copyright__ = 'University of Basel'
__email__ = "christian.steiner@unibas.ch"
__status__ = "Development"
__license__ = "GPL v3"
__version__ = "0.0.1"
from lxml import etree as ET
from os.path import isfile
from svgpathtools.parser import parse_path
#from svgpathtools.path import Path
from .attachable_object import AttachableObject
from .class_spec import SemanticClass
class Path(AttachableObject,SemanticClass):
"""
This super class represents all types of svg paths.
Args:
node (lxml.etree.Element) node, containing information
path (svgpathtools.path.Path) svg path representation.
"""
XML_TAG = 'path'
WORD_DELETION_PATH_TAG = 'word-deletion-path'
def __init__(self, id=0, node=None, path=None, style_class='', tag=XML_TAG):
self.intKeys = [ 'id' ]
self.stringKeys = [ 'style_class' ]
self.floatKeys = []
if node is not None:
self.id = int(node.get('id')) if bool(node.get('id')) else 0
self.path = parse_path(node.get('d')) if bool(node.get('d')) else None
self.style_class = node.get('style-class')
self.tag = node.tag
else:
self.tag = tag
self.id = id
self.path = path
self.style_class = style_class
def attach_object_to_tree(self, target_tree):
"""Attach object to tree.
"""
if target_tree.__class__.__name__ == '_ElementTree':
target_tree = target_tree.getroot()
obj_node = target_tree.xpath('.//' + self.tag + '[@id="%s"]' % self.id)[0] \
if(len(target_tree.xpath('.//' + self.tag + '[@id="%s"]' % self.id)) > 0) \
else ET.SubElement(target_tree, self.tag)
for key in self.floatKeys:
if self.__dict__[key] is not None:
obj_node.set(key.replace('_','-'), str(round(self.__dict__[key], 3)))
for key in self.intKeys + self.stringKeys:
if self.__dict__[key] is not None:
obj_node.set(key.replace('_','-'), str(self.__dict__[key]))
if self.path is not None:
obj_node.set('d', self.path.d())
@classmethod
def get_semantic_dictionary(cls):
""" Creates and returns a semantic dictionary as specified by SemanticClass.
"""
dictionary = {}
class_dict = cls.get_class_dictionary()
properties = {}
properties.update({'path': (str, 0, '{}/@d'.format(cls.XML_TAG))})
properties.update({'style_class': (str, 0, '{}/@style-class'.format(cls.XML_TAG))})
dictionary.update({'class': class_dict})
dictionary.update({'properties': properties})
return dictionary

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