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#!/usr/bin/env python
# coding=utf-8
# Copyright (C) 2011 Karlisson Bezerra <contact@hacktoon.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""
Save an SVG file into an html canvas file.
"""
import inkex
import ink2canvas_lib.svg as svg
from ink2canvas_lib.canvas import Canvas
class Html5Canvas(inkex.OutputExtension):
"""Creates a canvas output"""
def save(self, stream):
svg_root = self.document.getroot()
width = self.svg.viewbox_width
height = self.svg.viewbox_height
canvas = Canvas(self, width, height)
self.walk_tree(svg_root, canvas)
stream.write(canvas.output().encode("utf-8"))
def get_gradient_defs(self, elem):
"""Return the gradient information"""
url_id = elem.get_gradient_href()
# get the gradient element
gradient = self.svg.getElementById(url_id)
# get the color stops
gstops = gradient.href
colors = []
for stop in gstops:
colors.append(stop.style)
if gradient.get("r"):
return svg.RadialGradientDef(gradient, colors)
return svg.LinearGradientDef(gradient, colors)
@staticmethod
def _shape_from_node(node, canvas):
"""
Make a canvas shape object for the given node. Returns `None` if
the node is not an SVG shape element.
@rtype svg.AbstractShape or NoneType
"""
try:
prefix, _brace_, command = node.tag.partition("}")
except AttributeError:
return None # skip comments
if prefix != "{http://www.w3.org/2000/svg":
return None
# makes pylint happy
assert _brace_ == "}"
cls = getattr(svg, command.capitalize(), None)
if not (isinstance(cls, type) and issubclass(cls, svg.AbstractShape)):
return None
return cls(command, node, canvas)
def walk_tree(self, root, canvas):
"""Walk throug the whole svg tree"""
for node in root:
elem = self._shape_from_node(node, canvas)
if elem is None:
continue
gradient = None
if elem.has_gradient():
gradient = self.get_gradient_defs(elem)
elem.start(gradient)
try:
elem.draw()
except ValueError as error:
# print out the reason if any element can not be exported
canvas.write("// " + str(error))
continue
self.walk_tree(node, canvas)
elem.end()
if __name__ == "__main__":
Html5Canvas().run()
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