1 files changed, 147 insertions, 0 deletions
diff --git a/share/extensions/inkex/elements/_meta.py b/share/extensions/inkex/elements/_meta.py
new file mode 100644
index 0000000..f8107ad
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+++ b/share/extensions/inkex/elements/_meta.py
@@ -0,0 +1,147 @@
+# -*- 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'