345 lines
11 KiB
Python
Executable File
345 lines
11 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (C) 2016 Florian Festi
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import re, datetime
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from xml.etree import cElementTree as ElementTree
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ElementTree.register_namespace("","http://www.w3.org/2000/svg")
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ElementTree.register_namespace("xlink", "http://www.w3.org/1999/xlink")
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class Extend:
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def __init__(self):
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self.minx = None
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self.maxx = None
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self.miny = None
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self.maxy = None
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def __add__(self, v):
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x, y = v
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res = Extend()
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if self.minx is not None:
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res.minx = self.minx + x
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if self.maxx is not None:
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res.maxx = self.maxx + x
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if self.miny is not None:
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res.miny = self.miny + y
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if self.maxy is not None:
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res.maxy = self.maxy + y
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return res
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def addPoint(self, x, y):
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if x is not None:
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if self.minx is None or self.minx > x:
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self.minx = x
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if self.maxx is None or self.maxx < x:
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self.maxx = x
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if y is not None:
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if self.miny is None or self.miny > y:
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self.miny = y
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if self.maxy is None or self.maxy < y:
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self.maxy = y
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def addExtend(self, extend, x, y):
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extend = extend + (x, y)
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self.addPoint(extend.minx, extend.miny)
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self.addPoint(extend.maxx, extend.maxy)
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class SVGFile(object):
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pathre = re.compile(r"[MCL]? *((-?\d+(\.\d+)?) (-?\d+(\.\d+)?) *)+")
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transformre = re.compile(r"matrix\(" + ",".join([r"(-?\d+(\.\d+)?)"] * 6) + "\)")
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def __init__(self, filename):
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self.filename = filename
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self.minx = self.maxx = self.miny = self.maxy = None
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self.tree = ElementTree.parse(filename)
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self.symbol_extends = {}
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def fix(self, metadata=None):
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#print("Optimizations:",
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self.optimize(self.tree.getroot())
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self.getEnvelope()
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self.moveOrigin()
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self.addMetadata(metadata)
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self.rewriteViewPort()
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def getExtend(self, element, extend):
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if element.tag.endswith("}path"):
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minx = maxx = miny = maxy = None
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m = self.transformre.match(element.attrib.get("transform", ""))
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if m:
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matrix = [float(m.group(i)) for i in range(1, 12, 2)]
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else:
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matrix = [1, 0,
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0, 1,
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0, 0]
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for m in self.pathre.findall(element.attrib.get("d", "")):
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x = float(m[1])
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y = float(m[3])
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tx = matrix[0] * x + matrix[2] * y + matrix[4]
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ty = matrix[1] * x + matrix[3] * y + matrix[5]
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extend.addPoint(tx, ty)
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elif element.tag.endswith("}use"):
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x, y = float(element.attrib["x"]), float(element.attrib["y"])
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s = self.symbol_extends[element.attrib["{http://www.w3.org/1999/xlink}href"][1:]]
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extend.addExtend(s, x, y)
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for e in element:
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if e.tag.endswith("}symbol"):
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self.symbol_extends[e.attrib["id"]] = self.getExtend(e, Extend())
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else:
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self.getExtend(e, extend)
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return extend
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def getEnvelope(self):
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self.tags = []
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root = self.tree.getroot()
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self.extend = self.getExtend(root, Extend())
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def _moveElement(self, e, dx, dy):
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if e.tag.endswith("}symbol"):
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return
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if e.tag.endswith("}path"):
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minx = maxx = miny = maxy = None
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m = self.transformre.match(e.attrib.get("transform", ""))
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if m:
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matrix = [float(m.group(i)) for i in range(1, 12, 2)]
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else:
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matrix = [1, 0,
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0, 1,
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0, 0]
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matrix[4] += dx
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matrix[5] += dy
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e.attrib["transform"] = "matrix(%s)" % (",".join(("%.4f" % m for m in matrix)))
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if e.tag.endswith("}use"):
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e.attrib["x"] = "%.4f" % (float(e.attrib["x"])+dx)
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e.attrib["y"] = "%.4f" % (float(e.attrib["y"])+dy)
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for child in e:
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self._moveElement(child, dx, dy)
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def moveOrigin(self):
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self._moveElement(self.tree.getroot(),
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-self.extend.minx+10, -self.extend.miny+10)
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self.extend.maxx -= self.extend.minx-20
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self.extend.maxy -= self.extend.miny-20
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self.extend.minx = self.extend.miny = 0.0
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def rewriteViewPort(self):
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"""
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Modify SVG file to have the correct width, height and viewPort attributes.
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"""
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self.extend.minx = self.extend.minx or 0
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self.extend.miny = self.extend.miny or 0
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self.extend.maxx = self.extend.maxx or (self.extend.minx + 10)
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self.extend.maxy = self.extend.maxy or (self.extend.miny + 10)
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if 0 <= self.extend.minx <= 50:
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minx = 0
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else:
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minx = 10 * int(self.extend.minx // 10) - 10
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maxx = 10 * int(self.extend.maxx // 10) + 10
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miny = 10 * int(self.extend.miny // 10) - 10
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maxy = 10 * int(self.extend.maxy // 10) + 10
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root = self.tree.getroot()
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root.set('width', "%imm" % (maxx-minx))
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root.set('height', "%imm" % (maxy-miny))
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root.set('viewBox', "%i %i %i %i" % (minx, miny, maxx - minx, maxy - miny))
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self.tree.write(self.filename)
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d = r"(\-?\d+(\.\d+)?)"
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optimize_patterns = [
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(re.compile(" " + d + " " + d + r" (M|L) \1 \3 "),
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r" \1 \3 "), # remove useless moves
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# compress L parts of paths into V and H
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(re.compile(" " + d + " " + d + r" L " + d + r" \3 "),
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r" \1 \3 H \5 "),
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(re.compile(" " + d + " " + d + r" L \1 " + d + " "),
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r" \1 \3 V \5 "),
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(re.compile(r"H " + d + r" L \1 " + d + " "),
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r"H \1 V \3 "),
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(re.compile(r"V " + d + " L " + d + " \1 "),
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r"V \1 H \3 "),
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]
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def optimize(self, element):
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number = 0
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if element.tag.endswith("}path"):
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path = element.attrib.get("d", "")
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while True:
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old_number = number
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for pattern, replacement in self.optimize_patterns:
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path, n = pattern.subn(replacement, path)
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number += n
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if number == old_number:
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break
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element.attrib["d"] = path
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for e in element:
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number += self.optimize(e)
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return number
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def _addTag(self, parent, tag, text, first=False):
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if first:
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t = ElementTree.Element(tag)
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else:
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t = ElementTree.SubElement(parent, tag)
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t.text = text
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t.tail = '\n'
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if first:
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parent.insert(0, t)
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return t
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def addMetadata(self, md):
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root = self.tree.getroot()
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# Add Inkscape style rdf meta data
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root.set("xmlns:dc", "http://purl.org/dc/elements/1.1/")
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root.set("xmlns:cc", "http://creativecommons.org/ns#")
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root.set("xmlns:rdf","http://www.w3.org/1999/02/22-rdf-syntax-ns#")
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title = "{group} - {name}".format(**md)
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date = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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m = self._addTag(root, "metadata", '\n', True)
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r = ElementTree.SubElement(m, 'rdf:RDF')
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w = ElementTree.SubElement(r, 'cc:Work')
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w.text = '\n'
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self._addTag(w, 'dc:title', title)
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self._addTag(w, 'dc:date', date)
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if "url" in md and md["url"]:
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self._addTag(w, 'dc:source', md["url"])
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else:
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self._addTag(w, 'dc:source', md["cli"])
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desc = md["short_description"]
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if "description" in md and md["description"]:
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desc += "\n\n" + md["description"]
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desc += "\n\nCreated with Boxes.py (https://festi.info/boxes.py)\n"
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desc += "Command line: %s\n" % md["cli"]
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if md["url"]:
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desc += "Url: %s\n" % md["url"]
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desc += "SettingsUrl: %s\n" % re.sub(r"&render=[01]", "", md["url"])
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self._addTag(w, 'dc:description', desc)
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# title
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self._addTag(root, "title", md["name"], True)
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# Add XML comment
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txt = """
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{name} - {short_description}
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""".format(**md)
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if md["description"]:
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txt += """
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{description}
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""".format(**md)
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txt += """
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Created with Boxes.py (https://festi.info/boxes.py)
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Creation date: {date}
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""".format(date=date, **md)
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txt += "Command line (remove spaces beteen dashes): %s\n" % md["cli"].replace("--", "- -")
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if md["url"]:
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txt += "Url: %s\n" % md["url"]
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txt += "SettingsUrl: %s\n" % re.sub(r"&render=[01]", "", md["url"])
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m = ElementTree.Comment(txt)
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m.tail = '\n'
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root.insert(0, m)
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unit2mm = {"mm" : 1.0,
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"cm" : 10.0,
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"in" : 25.4,
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"px" : 90.0/25.4,
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"pt" : 90.0/25.4/1.25,
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"pc" : 90.0/25.4/15,
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}
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def getSizeInMM(tree):
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root = tree.getroot()
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m = re.match(r"(-?\d+\.?\d*)(\D+)", root.get("height"))
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height, units = m.groups()
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height = float(height) * unit2mm.get(units, 1.0)
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m = re.match(r"(-?\d+\.?\d*)(\D+)", root.get("width"))
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width, units = m.groups()
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width = float(width) * unit2mm.get(units, 1.0)
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return width, height
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def getViewBox(tree):
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root = tree.getroot()
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m = re.match(r"\s*(-?\d+\.?\d*)\s+"
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"(-?\d+\.?\d*)\s+"
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"(-?\d+\.?\d*)\s+"
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"(-?\d+\.?\d)\s*", root.get("viewBox"))
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return [float(m) for m in m.groups()]
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def ticksPerMM(tree):
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width, height = getSizeInMM(tree)
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x1, y1, x2, y2 = getViewBox(tree)
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return x2/width, y2/height
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def svgMerge(box, inkscape, output):
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src_tree = ElementTree.parse(box)
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dest_tree = ElementTree.parse(inkscape)
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dest_root = dest_tree.getroot()
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src_width, src_height = getSizeInMM(src_tree)
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dest_width, dest_height = getSizeInMM(dest_tree)
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src_scale_x, src_scale_y = ticksPerMM(src_tree)
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dest_scale_x, dest_scale_y = ticksPerMM(dest_tree)
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scale_x = dest_scale_x / src_scale_x
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scale_y = dest_scale_y / src_scale_y
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src_view = getViewBox(src_tree)
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off_x = src_view[0] * -scale_x
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off_y = (src_view[1]+src_view[3]) * -scale_y + dest_height * scale_y
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for el in src_tree.getroot():
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import sys
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dest_root.append(el)
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if el.tag.endswith("g"):
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el.set("transform", "matrix(%f,0,0,%f, %f, %f)" % (
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scale_x, scale_y, off_x, off_y))
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# write the xml file
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ElementTree.ElementTree(dest_root).write(output, encoding='utf-8', xml_declaration=True)
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if __name__ == "__main__":
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svg = SVGFile("examples/box.svg")
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svg.getEnvelope()
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svg.rewriteViewPort()
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