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# 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.
#
"""
Element parsing and context for ink2canvas extensions
"""
from __future__ import unicode_literals
import inkex
class Element(object):
"""Base Element"""
def __init__(self, node):
self.node = node
def attr(self, val):
"""Get attribute"""
try:
attr = float(self.node.get(val))
except:
attr = self.node.get(val)
return attr
class GradientDef(Element):
def __init__(self, node, stops):
self.node = node
self.stops = stops
class LinearGradientDef(GradientDef):
def get_data(self):
x1 = self.attr("x1")
y1 = self.attr("y1")
x2 = self.attr("x2")
y2 = self.attr("y2")
# self.createLinearGradient(href, x1, y1, x2, y2)
def draw(self):
pass
class RadialGradientDef(GradientDef):
def get_data(self):
cx = self.attr("cx")
cy = self.attr("cy")
r = self.attr("r")
# self.createRadialGradient(href, cx, cy, r, cx, cy, r)
def draw(self):
pass
class AbstractShape(Element):
def __init__(self, command, node, ctx):
self.node = node
self.command = command
self.ctx = ctx
def get_data(self):
return
def get_style(self):
return self.node.style
def set_style(self, style):
"""Translates style properties names into method calls"""
self.ctx.style = style
for key in style:
tmp_list = [s.capitalize() for s in key.split("-")]
method = "set" + "".join(tmp_list)
if hasattr(self.ctx, method) and style[key] != "none":
getattr(self.ctx, method)(style[key])
# saves style to compare in next iteration
self.ctx.style_cache = style
def has_transform(self):
return bool(self.attr("transform"))
def get_transform(self):
return self.node.transform.to_hexad()
def has_gradient(self):
style = self.get_style()
if "fill" in style:
fill = style["fill"]
return fill.startswith("url(#linear") or fill.startswith("url(#radial")
return False
def get_gradient_href(self):
style = self.get_style()
if "fill" in style:
return style["fill"][5:-1]
return
def has_clip(self):
return bool(self.attr("clip-path"))
def start(self, gradient):
self.gradient = gradient
self.ctx.write("\n// #%s" % self.attr("id"))
if self.has_transform() or self.has_clip():
self.ctx.save()
def draw(self):
data = self.get_data()
style = self.get_style()
self.ctx.beginPath()
if self.has_transform():
trans_matrix = self.get_transform()
self.ctx.transform(*trans_matrix) # unpacks argument list
if self.has_gradient():
self.gradient.draw()
self.set_style(style)
# unpacks "data" in parameters to given method
getattr(self.ctx, self.command)(*data)
self.ctx.closePath()
def end(self):
if self.has_transform() or self.has_clip():
self.ctx.restore()
class G(AbstractShape):
def draw(self):
# get layer label, if exists
if self.has_transform():
trans_matrix = self.get_transform()
self.ctx.transform(*trans_matrix)
class Rect(AbstractShape):
def get_data(self):
x = self.attr("x")
y = self.attr("y")
w = self.attr("width")
h = self.attr("height")
rx = self.attr("rx") or 0
ry = self.attr("ry") or 0
return x, y, w, h, rx, ry
class Circle(AbstractShape):
def __init__(self, command, node, ctx):
AbstractShape.__init__(self, command, node, ctx)
self.command = "arc"
def get_data(self):
import math
cx = self.attr("cx")
cy = self.attr("cy")
r = self.attr("r")
return cx, cy, r, 0, math.pi * 2, True
class Ellipse(AbstractShape):
def get_data(self):
cx = self.attr("cx")
cy = self.attr("cy")
rx = self.attr("rx")
ry = self.attr("ry")
return cx, cy, rx, ry
def draw(self):
import math
cx, cy, rx, ry = self.get_data()
style = self.get_style()
self.ctx.beginPath()
if self.has_transform():
trans_matrix = self.get_transform()
self.ctx.transform(*trans_matrix) # unpacks argument list
self.set_style(style)
KAPPA = 4 * ((math.sqrt(2) - 1) / 3)
self.ctx.moveTo(cx, cy - ry)
self.ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy)
self.ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry)
self.ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy)
self.ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry)
self.ctx.closePath()
class Path(AbstractShape):
def pathMoveTo(self, data):
self.ctx.moveTo(data[0], data[1])
self.currentPosition = data[0], data[1]
def pathLineTo(self, data):
self.ctx.lineTo(data[0], data[1])
self.currentPosition = data[0], data[1]
def pathCurveTo(self, data):
x1, y1, x2, y2 = data[0], data[1], data[2], data[3]
x, y = data[4], data[5]
self.ctx.bezierCurveTo(x1, y1, x2, y2, x, y)
self.currentPosition = x, y
def draw(self):
"""Gets the node type and calls the given method"""
style = self.get_style()
self.ctx.beginPath()
if self.has_transform():
trans_matrix = self.get_transform()
self.ctx.transform(*trans_matrix) # unpacks argument list
self.set_style(style)
# Draws path commands
path_command = {"M": self.pathMoveTo,
"L": self.pathLineTo,
"C": self.pathCurveTo}
# Make sure we only have Lines and curves (no arcs etc)
for comm, data in self.node.path.to_superpath().to_path().to_arrays():
if comm in path_command:
path_command[comm](data)
self.ctx.closePath()
class Line(Path):
def get_data(self):
x1 = self.attr("x1")
y1 = self.attr("y1")
x2 = self.attr("x2")
y2 = self.attr("y2")
return ("M", (x1, y1)), ("L", (x2, y2))
class Polygon(Path):
def get_data(self):
points = self.attr("points").strip().split(" ")
points = map(lambda x: x.split(","), points)
comm = []
for pt in points: # creating path command similar
pt = list(map(float, pt))
comm.append(["L", pt])
comm[0][0] = "M" # first command must be a 'M' => moveTo
return comm
class Polyline(Polygon):
pass
class Text(AbstractShape):
def text_helper(self, tspan):
if not len(tspan):
return tspan.text
for ts in tspan:
return ts.text + self.text_helper(ts) + ts.tail
def set_text_style(self, style):
keys = ("font-style", "font-weight", "font-size", "font-family")
text = []
for key in keys:
if key in style:
text.append(style[key])
self.ctx.setFont(" ".join(text))
def get_data(self):
x = self.attr("x")
y = self.attr("y")
return x, y
def draw(self):
x, y = self.get_data()
style = self.get_style()
if self.has_transform():
trans_matrix = self.get_transform()
self.ctx.transform(*trans_matrix) # unpacks argument list
self.set_style(style)
self.set_text_style(style)
for tspan in self.node:
text = self.text_helper(tspan)
_x = float(tspan.get("x").split()[0])
_y = float(tspan.get("y").split()[0])
self.ctx.fillText(text, _x, _y)
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