206 lines
8.7 KiB
Python
206 lines
8.7 KiB
Python
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#!/usr/bin/env python3
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#
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# License: GPL2
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# Copyright Mark "Klowner" Riedesel
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# https://github.com/Klowner/inkscape-applytransforms
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#
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import copy
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import math
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from lxml import etree
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import re
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import inkex
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from inkex.paths import CubicSuperPath, Path
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from inkex.transforms import Transform
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from inkex.styles import Style
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NULL_TRANSFORM = Transform([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
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class ApplyTransformations(inkex.EffectExtension):
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def effect(self):
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if self.svg.selected:
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for id, shape in self.svg.selected.items():
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self.recursiveFuseTransform(shape)
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else:
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self.recursiveFuseTransform(self.document.getroot())
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@staticmethod
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def objectToPath(element):
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if element.tag == inkex.addNS('g', 'svg'):
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return element
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if element.tag == inkex.addNS('path', 'svg') or element.tag == 'path':
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for attName in element.attrib.keys():
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if ("sodipodi" in attName) or ("inkscape" in attName):
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del element.attrib[attName]
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return element
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return element
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def scaleStrokeWidth(self, element, transf):
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if 'style' in element.attrib:
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style = element.attrib.get('style')
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style = dict(Style.parse_str(style))
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update = False
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if 'stroke-width' in style:
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try:
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stroke_width = self.svg.unittouu(style.get('stroke-width')) / self.svg.unittouu("1px")
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stroke_width *= math.sqrt(abs(transf.a * transf.d - transf.b * transf.c))
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style['stroke-width'] = str(stroke_width)
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update = True
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except AttributeError as e:
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pass
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if update:
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element.attrib['style'] = Style(style).to_str()
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def recursiveFuseTransform(self, element, transf=[[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]):
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transf = Transform(transf) @ Transform(element.get("transform", None)) #a, b, c, d = linear transformations / e, f = translations
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if 'transform' in element.attrib:
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del element.attrib['transform']
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element = ApplyTransformations.objectToPath(element)
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if transf == NULL_TRANSFORM:
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# Don't do anything if there is effectively no transform applied
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# reduces alerts for unsupported elements
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pass
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elif 'd' in element.attrib:
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d = element.get('d')
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p = CubicSuperPath(d)
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p = Path(p).to_absolute().transform(transf, True)
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element.set('d', str(Path(CubicSuperPath(p).to_path())))
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self.scaleStrokeWidth(element, transf)
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elif element.tag in [inkex.addNS('polygon', 'svg'),
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inkex.addNS('polyline', 'svg')]:
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points = element.get('points')
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points = points.strip().split(' ')
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for k, p in enumerate(points):
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if ',' in p:
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p = p.split(',')
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p = [float(p[0]), float(p[1])]
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p = transf.apply_to_point(p)
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p = [str(p[0]), str(p[1])]
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p = ','.join(p)
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points[k] = p
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points = ' '.join(points)
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element.set('points', points)
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self.scaleStrokeWidth(element, transf)
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elif element.tag in [inkex.addNS("ellipse", "svg"), inkex.addNS("circle", "svg")]:
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def isequal(a, b):
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return abs(a - b) <= transf.absolute_tolerance
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if element.TAG == "ellipse":
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rx = float(element.get("rx"))
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ry = float(element.get("ry"))
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else:
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rx = float(element.get("r"))
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ry = rx
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cx = float(element.get("cx"))
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cy = float(element.get("cy"))
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sqxy1 = (cx - rx, cy - ry)
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sqxy2 = (cx + rx, cy - ry)
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sqxy3 = (cx + rx, cy + ry)
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newxy1 = transf.apply_to_point(sqxy1)
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newxy2 = transf.apply_to_point(sqxy2)
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newxy3 = transf.apply_to_point(sqxy3)
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element.set("cx", (newxy1[0] + newxy3[0]) / 2)
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element.set("cy", (newxy1[1] + newxy3[1]) / 2)
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edgex = math.sqrt(
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abs(newxy1[0] - newxy2[0]) ** 2 + abs(newxy1[1] - newxy2[1]) ** 2
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)
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edgey = math.sqrt(
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abs(newxy2[0] - newxy3[0]) ** 2 + abs(newxy2[1] - newxy3[1]) ** 2
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)
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if not isequal(edgex, edgey) and (
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element.TAG == "circle"
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or not isequal(newxy2[0], newxy3[0])
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or not isequal(newxy1[1], newxy2[1])
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):
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inkex.utils.errormsg(
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"Warning: Shape %s (%s) is approximate only, try Object to path first for better results"
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% (element.TAG, element.get("id"))
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)
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if element.TAG == "ellipse":
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element.set("rx", edgex / 2)
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element.set("ry", edgey / 2)
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else:
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element.set("r", edgex / 2)
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# this is unstable at the moment
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elif element.tag == inkex.addNS("use", "svg"):
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href = None
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old_href_key = '{http://www.w3.org/1999/xlink}href'
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new_href_key = 'href'
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if element.attrib.has_key(old_href_key) is True: # {http://www.w3.org/1999/xlink}href (which gets displayed as 'xlink:href') attribute is deprecated. the newer attribute is just 'href'
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href = element.attrib.get(old_href_key)
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#element.attrib.pop(old_href_key)
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if element.attrib.has_key(new_href_key) is True:
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href = element.attrib.get(new_href_key) #we might overwrite the previous deprecated xlink:href but it's okay
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#element.attrib.pop(new_href_key)
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#get the linked object from href attribute
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linkedObject = self.document.getroot().xpath("//*[@id = '%s']" % href.lstrip('#')) #we must remove hashtag symbol
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linkedObjectCopy = copy.copy(linkedObject[0])
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objectType = linkedObject[0].tag
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if objectType == inkex.addNS("image", "svg"):
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mask = None #image might have an alpha channel
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new_mask_id = self.svg.get_unique_id("mask")
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newMask = None
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if element.attrib.has_key('mask') is True:
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mask = element.attrib.get('mask')
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#element.attrib.pop('mask')
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#get the linked mask from mask attribute. We remove the old and create a new
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if mask is not None:
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linkedMask = self.document.getroot().xpath("//*[@id = '%s']" % mask.lstrip('url(#').rstrip(')')) #we must remove hashtag symbol
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linkedMask[0].delete()
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maskAttributes = {'id': new_mask_id}
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newMask = etree.SubElement(self.document.getroot(), inkex.addNS('mask', 'svg'), maskAttributes)
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width = float(linkedObjectCopy.get('width')) * transf.a
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height = float(linkedObjectCopy.get('height')) * transf.d
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linkedObjectCopy.set('width', '{:1.6f}'.format(width))
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linkedObjectCopy.set('height', '{:1.6f}'.format(height))
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linkedObjectCopy.set('x', '{:1.6f}'.format(transf.e))
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linkedObjectCopy.set('y', '{:1.6f}'.format(transf.f))
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if newMask is not None:
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linkedObjectCopy.set('mask', 'url(#' + new_mask_id + ')')
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maskRectAttributes = {'x': '{:1.6f}'.format(transf.e), 'y': '{:1.6f}'.format(transf.f), 'width': '{:1.6f}'.format(width), 'height': '{:1.6f}'.format(height), 'style':'fill:#ffffff;'}
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maskRect = etree.SubElement(newMask, inkex.addNS('rect', 'svg'), maskRectAttributes)
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self.document.getroot().append(linkedObjectCopy) #for each svg:use we append a copy to the document root
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element.delete() #then we remove the use object
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else:
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#self.recursiveFuseTransform(linkedObjectCopy, transf)
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self.recursiveFuseTransform(element.unlink(), transf)
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elif element.tag in [inkex.addNS('rect', 'svg'),
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inkex.addNS('text', 'svg'),
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inkex.addNS('image', 'svg')]:
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element.attrib['transform'] = str(transf)
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inkex.utils.errormsg(
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"Shape %s (%s) not yet supported. Not all transforms will be applied. Try Object to path first"
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% (element.TAG, element.get("id"))
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)
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else:
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# e.g. <g style="...">
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self.scaleStrokeWidth(element, transf)
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for child in element.getchildren():
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self.recursiveFuseTransform(child, transf)
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if __name__ == '__main__':
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ApplyTransformations().run()
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