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# -*- coding: utf-8 -*-
#
# Copyright (c) 2020 Martin Owens <doctormo@gmail.com>
# Maren Hachmann <moini>
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# pylint: disable=arguments-differ
"""
Provide extra utility to each svg element type specific to its type.
This is useful for having a common interface for each element which can
give path, transform, and property access easily.
"""
import math
from lxml import etree
from ..styles import StyleSheet
from ..transforms import Vector2d
from ._base import BaseElement
class Defs(BaseElement):
"""A header defs element, one per document"""
tag_name = 'defs'
class StyleElement(BaseElement):
"""A CSS style element containing multiple style definitions"""
tag_name = 'style'
def set_text(self, content):
"""Sets the style content text as a CDATA section"""
self.text = etree.CDATA(str(content))
def stylesheet(self):
"""Return the StyleSheet() object for the style tag"""
return StyleSheet(self.text, callback=self.set_text)
class Script(BaseElement):
"""A javascript tag in SVG"""
tag_name = 'script'
def set_text(self, content):
"""Sets the style content text as a CDATA section"""
self.text = etree.CDATA(str(content))
class Desc(BaseElement):
"""Description element"""
tag_name = 'desc'
class Title(BaseElement):
"""Title element"""
tag_name = 'title'
class NamedView(BaseElement):
"""The NamedView element is Inkscape specific metadata about the file"""
tag_name = 'sodipodi:namedview'
current_layer = property(lambda self: self.get('inkscape:current-layer'))
@property
def center(self):
"""Returns view_center in terms of document units"""
return Vector2d(self.root.unittouu(self.get('inkscape:cx') or 0),
self.root.unittouu(self.get('inkscape:cy') or 0))
def get_guides(self):
"""Returns a list of guides"""
return self.findall('sodipodi:guide')
def new_guide(self, position, orient=True, name=None):
"""Creates a new guide in this namedview"""
if orient is True:
elem = Guide().move_to(0, position, (0, 1))
elif orient is False:
elem = Guide().move_to(position, 0, (1, 0))
if name:
elem.set('inkscape:label', str(name))
return self.add(elem)
class Guide(BaseElement):
"""An inkscape guide"""
tag_name = 'sodipodi:guide'
is_horizontal = property(lambda self: self.get('orientation').startswith('0,') and not
self.get('orientation') == '0,0')
is_vertical = property(lambda self: self.get('orientation').endswith(',0'))
point = property(lambda self: Vector2d(self.get('position')))
@classmethod
def new(cls, pos_x, pos_y, angle, **attrs):
guide = super(Guide, cls).new(**attrs)
guide.move_to(pos_x, pos_y, angle=angle)
return guide
def move_to(self, pos_x, pos_y, angle=None):
"""
Move this guide to the given x,y position,
Angle may be a float or integer, which will change the orientation. Alternately,
it may be a pair of numbers (tuple) which will set the orientation directly.
"""
self.set('position', "{:g},{:g}".format(float(pos_x), float(pos_y)))
if isinstance(angle, str):
if ',' not in angle:
angle = float(angle)
if isinstance(angle, (float, int)):
# Generate orientation from angle
angle = (math.sin(math.radians(angle)), -math.cos(math.radians(angle)))
if isinstance(angle, (tuple, list)) and len(angle) == 2:
angle = "{:g},{:g}".format(*angle)
self.set('orientation', angle)
return self
class Metadata(BaseElement):
"""Inkscape Metadata element"""
tag_name = 'metadata'
class ForeignObject(BaseElement):
"""SVG foreignObject element"""
tag_name = 'foreignObject'
class Switch(BaseElement):
"""A switch element"""
tag_name = 'switch'
class Grid(BaseElement):
"""A namedview grid child"""
tag_name = 'inkscape:grid'
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