520 lines
27 KiB
Python
520 lines
27 KiB
Python
#!/usr/bin/env python3
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import inkex
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from inkex.bezier import csplength, csparea
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from lxml import etree
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import re
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import math
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class LaserCheck(inkex.EffectExtension):
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'''
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check for old styles which should be upgraded
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'''
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def add_arguments(self, pars):
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pars.add_argument('--tab')
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pars.add_argument('--checks', default="check_all")
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pars.add_argument('--show_issues_only', type=inkex.Boolean, default=False)
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pars.add_argument('--bbox', type=inkex.Boolean, default=False)
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pars.add_argument('--bbox_offset', type=float, default=5.000)
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pars.add_argument("--machine_size", default="812x508")
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pars.add_argument('--groups_and_layers', type=inkex.Boolean, default=False)
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pars.add_argument('--clones', type=inkex.Boolean, default=False)
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pars.add_argument('--clippaths', type=inkex.Boolean, default=False)
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pars.add_argument('--images', type=inkex.Boolean, default=False)
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pars.add_argument('--texts', type=inkex.Boolean, default=False)
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pars.add_argument('--lowlevelstrokes', type=inkex.Boolean, default=False)
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pars.add_argument('--stroke_colors', type=inkex.Boolean, default=False)
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pars.add_argument('--stroke_widths', type=inkex.Boolean, default=False)
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pars.add_argument('--stroke_opacities', type=inkex.Boolean, default=False)
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pars.add_argument('--cosmestic_dashes', type=inkex.Boolean, default=False)
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pars.add_argument('--invisible_shapes', type=inkex.Boolean, default=False)
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pars.add_argument('--pointy_paths', type=inkex.Boolean, default=False)
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pars.add_argument('--transformations', type=inkex.Boolean, default=False)
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pars.add_argument('--short_paths', type=inkex.Boolean, default=False)
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pars.add_argument('--short_paths_min', type=float, default=1.000)
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pars.add_argument('--non_path_shapes', type=inkex.Boolean, default=False)
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def effect(self):
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so = self.options
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selected = [] #total list of elements to parse
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def parseChildren(element):
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if element not in selected:
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selected.append(element)
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children = element.getchildren()
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if children is not None:
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for child in children:
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if child not in selected:
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selected.append(child)
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parseChildren(child) #go deeper and deeper
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#check if we have selected elements or if we should parse the whole document instead
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if len(self.svg.selected) == 0:
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for element in self.document.getroot().iter(tag=etree.Element):
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if element != self.document.getroot():
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selected.append(element)
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else:
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for element in self.svg.selected.values():
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parseChildren(element)
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namedView = self.document.getroot().find(inkex.addNS('namedview', 'sodipodi'))
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doc_units = namedView.get(inkex.addNS('document-units', 'inkscape'))
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user_units = namedView.get(inkex.addNS('units'))
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pagecolor = namedView.get('pagecolor')
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inkex.utils.debug("---------- Default checks")
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inkex.utils.debug("Document units: {}".format(doc_units))
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inkex.utils.debug("User units: {}".format(user_units))
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'''
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The SVG format is highly complex and offers a lot of possibilities. Most things of SVG we do not
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need for a laser cutter. Usually we need svg:path and maybe svg:image; we can drop a lot of stuff
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like svg:defs, svg:desc, gradients, etc.
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'''
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nonShapes = []
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shapes = []
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for element in selected:
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if not isinstance(element, inkex.ShapeElement):
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nonShapes.append(element)
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else:
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shapes.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} shape elements in total".format(len(shapes)))
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inkex.utils.debug("{} non-shape elements in total".format(len(nonShapes)))
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for nonShape in nonShapes:
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inkex.utils.debug("non-shape id={}".format(nonShape.get('id')))
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'''
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Nearly each laser job needs a bit of border to place the material inside the laser. Often
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we have to fixate on vector grid, pin grid or task plate. Thus we need tapes or pins. So we
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leave some borders off the actual part geometries.
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'''
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if so.checks == "check_all" or so.bbox is True:
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inkex.utils.debug("\n---------- Borders around all elements - minimum offset {} mm from each side".format(so.bbox_offset))
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bbox = inkex.BoundingBox()
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for element in self.document.getroot().iter(tag=etree.Element):
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if element != self.document.getroot() and isinstance(element, inkex.ShapeElement) and element.tag != inkex.addNS('use','svg') and element.get('inkscape:groupmode') != 'layer': #bbox fails for svg:use elements and layers
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transform = inkex.Transform()
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parent = element.getparent()
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if parent is not None and isinstance(parent, inkex.ShapeElement):
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transform = parent.composed_transform()
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try:
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if isinstance (element, inkex.Rectangle) or \
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isinstance (element, inkex.Circle) or \
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isinstance (element, inkex.Ellipse):
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bbox += element.bounding_box() * scale_factor
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elif isinstance (element, inkex.TextElement) or \
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isinstance (element, inkex.Tspan):
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continue
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else:
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bbox += element.bounding_box(transform)
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except Exception:
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transform = element.composed_transform()
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x1, y1 = transform.apply_to_point([0, 0])
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x2, y2 = transform.apply_to_point([1, 1])
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bbox += inkex.BoundingBox((x1, x2), (y1, y2))
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if abs(bbox.width) == math.inf or abs(bbox.height) == math.inf:
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inkex.utils.debug("bounding box could not be calculated. SVG seems to be empty.")
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#else:
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# inkex.utils.debug("bounding box is {}".format(bbox))
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scale_factor = self.svg.unittouu("1px")
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page_width = self.svg.unittouu(self.document.getroot().attrib['width'])
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width_height = self.svg.unittouu(self.document.getroot().attrib['height'])
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fmm = self.svg.unittouu(str(so.bbox_offset) + "mm")
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bb_left = round(bbox.left, 3)
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bb_right = round(bbox.right, 3)
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bb_top = round(bbox.top, 3)
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bb_bottom = round(bbox.bottom, 3)
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bb_width = round(bbox.width, 3)
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bb_height = round(bbox.height, 3)
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if bb_left >= fmm:
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inkex.utils.debug("left border... ok")
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else:
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inkex.utils.debug("left border... fail: {:0.3f} mm".format(self.svg.uutounit(bb_left, "mm")))
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if bb_top >= fmm:
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inkex.utils.debug("top border... ok")
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else:
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inkex.utils.debug("top border... fail: {:0.3f} mm".format(self.svg.uutounit(bb_top, "mm")))
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if bb_right + fmm <= page_width:
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inkex.utils.debug("right border... ok")
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else:
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inkex.utils.debug("right border... fail: {:0.3f} mm".format(self.svg.uutounit(bb_right, "mm")))
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if bb_bottom + fmm <= width_height:
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inkex.utils.debug("bottom border... ok")
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else:
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inkex.utils.debug("bottom border... fail: {:0.3f} mm".format(self.svg.uutounit(bb_bottom, "mm")))
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machineWidth = self.svg.unittouu(self.options.machine_size.split('x')[0] + "mm")
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if bb_width <= machineWidth:
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inkex.utils.debug("page width... ok")
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else:
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inkex.utils.debug("page width... fail: {:0.3f} mm".format(bb_width))
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machineHeight = self.svg.unittouu(self.options.machine_size.split('x')[1] + "mm")
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if bb_height <= machineHeight:
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inkex.utils.debug("page height... ok")
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else:
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inkex.utils.debug("page height... fail: {:0.3f} mm".format(bb_height))
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if so.checks == "check_all" or so.groups_and_layers is True:
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inkex.utils.debug("\n---------- Groups and layers")
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global md
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md = 0
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def maxDepth(element, level):
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global md
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if (level == md):
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md += 1
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for child in element:
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maxDepth(child, level + 1)
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maxDepth(self.document.getroot(), -1)
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self.msg("Maximum group depth={}".format(md - 1))
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if md - 1 > 2:
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self.msg("Warning: this group depth might cause issues!")
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groups = []
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layers = []
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for element in selected:
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if element.tag == inkex.addNS('g','svg'):
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if element.get('inkscape:groupmode') == 'layer':
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layers.append(element)
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else:
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groups.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} groups in total".format(len(groups)))
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inkex.utils.debug("{} layers in total".format(len(layers)))
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#check for empty groups
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for group in groups:
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if len(group) == 0:
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inkex.utils.debug("id={} is empty group".format(group.get('id')))
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#check for empty layers
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for layer in layers:
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if len(layer) == 0:
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inkex.utils.debug("id={} is empty layer".format(layer.get('id')))
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'''
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Clones should be unlinked because they cause similar issues like transformations
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'''
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if so.checks == "check_all" or so.clones is True:
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inkex.utils.debug("\n---------- Clones (svg:use) - maybe unlink")
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uses = []
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for element in selected:
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if element.tag == inkex.addNS('use','svg'):
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uses.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} svg:use clones in total".format(len(uses)))
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for use in uses:
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inkex.utils.debug("id={}".format(use.get('id')))
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'''
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Clip paths are neat to visualize things, but they do not perform a real path cutting.
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Please perform real intersections to have an intact target geometry.
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'''
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if so.checks == "check_all" or so.clippaths is True:
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inkex.utils.debug("\n---------- Clippings (svg:clipPath) - please replace with real cut paths")
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clipPaths = []
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for element in selected:
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if element.tag == inkex.addNS('clipPath','svg'):
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clipPaths.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} svg:clipPath in total".format(len(clipPaths)))
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for clipPath in clipPaths:
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inkex.utils.debug("id={}".format(clipPath.get('id')))
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'''
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Sometimes images look like vector but they are'nt. In case you dont want to perform engraving, either
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check to drop or trace to vector paths
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'''
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if so.checks == "check_all" or so.images is True:
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inkex.utils.debug("\n---------- Images (svg:image) - maybe trace to svg")
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images = []
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for element in selected:
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if element.tag == inkex.addNS('image','svg'):
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images.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} svg:image in total".format(len(images)))
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for image in images:
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inkex.utils.debug("image id={}".format(image.get('id')))
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'''
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Low level strokes cannot be properly edited in Inkscape (no node handles). Converting helps
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'''
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if so.checks == "check_all" or so.lowlevelstrokes is True:
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inkex.utils.debug("\n---------- Low level strokes (svg:line/polyline/polygon) - maybe convert to path")
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lowlevels = []
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for element in selected:
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if element.tag in (inkex.addNS('line','svg'), inkex.addNS('polyline','svg'), inkex.addNS('polygon','svg')):
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lowlevels.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} low level strokes in total".format(len(lowlevels)))
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for lowlevel in lowlevels:
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inkex.utils.debug("id={}".format(lowlevel.get('id')))
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'''
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Texts cause problems when sharing with other people. You must ensure that everyone has the
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font files installed you used. Convert to paths avoids this issue and guarantees same result
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everywhere.
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'''
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if so.checks == "check_all" or so.texts is True:
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inkex.utils.debug("\n---------- Texts (should be converted to paths)")
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texts = []
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for element in selected:
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if element.tag == inkex.addNS('text','svg'):
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texts.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} svg:text in total".format(len(texts)))
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for text in texts:
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inkex.utils.debug("id={}".format(text.get('id')))
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'''
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The more stroke colors the more laser job configuration is required. Reduce the SVG file
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to a minimum of stroke colors to be quicker
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'''
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if so.checks == "check_all" or so.stroke_colors is True:
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inkex.utils.debug("\n---------- Stroke colors")
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strokeColors = []
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for element in shapes:
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style = element.get('style')
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if style is not None:
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stroke = re.search('(;|^)stroke:(.*?)(;|$)', style)
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if stroke is not None:
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strokeColor = stroke[0].split("stroke:")[1].split(";")[0]
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if strokeColor not in strokeColors:
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strokeColors.append(strokeColor)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} different stroke colors in total".format(len(strokeColors)))
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for strokeColor in strokeColors:
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inkex.utils.debug("stroke color {}".format(strokeColor))
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'''
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Different stroke widths might behave the same like different stroke colors. Reduce to a minimum set.
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Ideally all stroke widths are set to 1 pixel.
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'''
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if so.checks == "check_all" or so.stroke_widths is True:
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inkex.utils.debug("\n---------- Stroke widths")
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strokeWidths = []
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for element in shapes:
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style = element.get('style')
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if style is not None:
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stroke_width = re.search('stroke-width:(.*?)(;|$)', style)
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if stroke_width is not None:
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strokeWidth = stroke_width[0].split("stroke-width:")[1].split(";")[0] #possibly w/o units. could contain units from css
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if strokeWidth not in strokeWidths:
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strokeWidths.append(strokeWidth)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} different stroke widths in total".format(len(strokeWidths)))
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for strokeWidth in strokeWidths:
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swConverted = self.svg.uutounit(float(self.svg.unittouu(strokeWidth))) #possibly w/o units. we unify to some internal float
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inkex.utils.debug("stroke width {}px ({}mm)".format(
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round(self.svg.uutounit(swConverted, "px"),4),
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round(self.svg.uutounit(swConverted, "mm"),4),
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)
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)
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'''
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Cosmetic dashes cause simulation issues and are no real cut paths. It's similar to the thing
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with clip paths. Please convert lines to real dash segments if you want to laser them.
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'''
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if so.checks == "check_all" or so.cosmestic_dashes is True:
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inkex.utils.debug("\n---------- Cosmetic dashes - should be converted to paths")
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strokeDasharrays = []
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for element in shapes:
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style = element.get('style')
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if style is not None:
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stroke_dasharray = re.search('stroke-dasharray:(.*?)(;|$)', style)
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if stroke_dasharray is not None:
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strokeDasharray = stroke_dasharray[0].split("stroke-dasharray:")[1].split(";")[0]
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if strokeDasharray not in strokeDasharrays:
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strokeDasharrays.append(strokeDasharray)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} different stroke dash arrays in total".format(len(strokeDasharrays)))
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for strokeDasharray in strokeDasharrays:
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inkex.utils.debug("stroke dash array {}".format(strokeDasharray))
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'''
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Shapes/paths with the same color like the background, 0% opacity, etc. lead to strange
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laser cutting results, like duplicated edges, enlarged laser times and more. Please double
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check for such occurences.
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'''
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if so.checks == "check_all" or so.invisible_shapes is True:
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inkex.utils.debug("\n---------- Invisible shapes")
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invisibles = []
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for element in shapes:
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if element.tag not in (inkex.addNS('tspan','svg')):
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style = element.get('style')
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if style is not None:
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stroke = re.search('stroke:(.*?)(;|$)', style) #filter white on white (we guess the background color of the document is white too but we do not check)
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if stroke is None:
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strokeVis = 0
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elif stroke[0].split("stroke:")[1].split(";")[0] == 'none':
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strokeVis = 0
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elif stroke[0].split("stroke:")[1].split(";")[0] in ('#ffffff', 'white', 'rgb(255,255,255)'):
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strokeVis = 0
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else:
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strokeVis = 1
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stroke_width = re.search('stroke-width:(.*?)(;|$)', style)
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if stroke_width is None:
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widthVis = 0
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elif self.svg.unittouu(stroke_width[0].split("stroke-width:")[1].split(";")[0]) < 0.005: #really thin (0,005pc = 0,080px)
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widthVis = 0
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else:
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widthVis = 1
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stroke_opacity = re.search('stroke-opacity:(.*?)(;|$)', style)
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if stroke_opacity is None:
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strokeOpacityVis = 0
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elif float(stroke_opacity[0].split("stroke-opacity:")[1].split(";")[0]) < 0.05: #nearly invisible (<5% opacity)
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strokeOpacityVis = 0
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else:
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strokeOpacityVis = 1
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if pagecolor == '#ffffff':
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invisColors = [pagecolor, 'white', 'rgb(255,255,255)']
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else:
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invisColors = [pagecolor] #we could add some parser to convert pagecolor to rgb/hsl/cmyk
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fill = re.search('fill:(.*?)(;|$)', style)
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if fill is None:
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fillVis = 0
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elif fill[0].split("fill:")[1].split(";")[0] == 'none':
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fillVis = 0
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elif fill[0].split("fill:")[1].split(";")[0] in invisColors:
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fillVis = 0
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else:
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fillVis = 1
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fill_opacity = re.search('fill-opacity:(.*?)(;|$)', style)
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if fill_opacity is None:
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fillOpacityVis = 0
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elif float(fill_opacity[0].split("fill-opacity:")[1].split(";")[0]) < 0.05: #nearly invisible (<5% opacity)
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fillOpacityVis = 0
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else:
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fillOpacityVis = 1
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#inkex.utils.debug("strokeVis={}, widthVis={}, strokeOpacityVis={}, fillVis={}, fillOpacityVis={}".format(strokeVis, widthVis, strokeOpacityVis, fillVis, fillOpacityVis))
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if (strokeVis == 0 or widthVis == 0 or strokeOpacityVis == 0) and (fillVis == 0 or fillOpacityVis == 0):
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if element not in invisibles:
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invisibles.append(element)
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if self.options.show_issues_only is False:
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inkex.utils.debug("{} invisible shapes in total".format(len(invisibles)))
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for invisible in invisibles:
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inkex.utils.debug("id={}".format(invisible.get('id')))
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|
'''
|
|
Additionally, stroke opacities less than 1.0 cause problems in most laser softwares. Please
|
|
adjust all strokes to use full opacity.
|
|
'''
|
|
if so.checks == "check_all" or so.stroke_opacities is True:
|
|
inkex.utils.debug("\n---------- Objects with stroke transparencies < 1.0 - should be set to 1.0")
|
|
transparencies = []
|
|
for element in shapes:
|
|
style = element.get('style')
|
|
if style is not None:
|
|
stroke_opacity = re.search('stroke-opacity:(.*?)(;|$)', style)
|
|
if stroke_opacity is not None:
|
|
if float(stroke_opacity[0].split("stroke-opacity:")[1].split(";")[0]) < 1.0:
|
|
if element not in transparencies:
|
|
transparencies.append(element)
|
|
if self.options.show_issues_only is False:
|
|
inkex.utils.debug("{} objects with stroke transparencies < 1.0 in total".format(len(transparencies)))
|
|
for transparency in transparencies:
|
|
inkex.utils.debug("id={}".format(transparency.get('id')))
|
|
|
|
'''
|
|
We look for paths which are just points. Those are useless in case of lasercutting.
|
|
Note: this scan only works for paths, not for subpaths. If so, you need to break apart before
|
|
'''
|
|
if so.checks == "check_all" or so.pointy_paths is True:
|
|
inkex.utils.debug("\n---------- Pointy paths - should be deleted")
|
|
pointyPaths = []
|
|
for element in shapes:
|
|
if isinstance(element, inkex.PathElement):
|
|
p = element.path
|
|
commandsCoords = p.to_arrays()
|
|
if len(commandsCoords) == 1 or \
|
|
(len(commandsCoords) == 2 and commandsCoords[0][1] == commandsCoords[1][1]) or \
|
|
(len(commandsCoords) == 2 and commandsCoords[-1][0] == 'Z') or \
|
|
(len(commandsCoords) == 3 and commandsCoords[0][1] == commandsCoords[1][1] and commandsCoords[2][1] == 'Z'):
|
|
pointyPaths.append(element)
|
|
if self.options.show_issues_only is False:
|
|
inkex.utils.debug("{} pointy paths in total".format(len(pointyPaths)))
|
|
for pointyPath in pointyPaths:
|
|
inkex.utils.debug("id={}".format(pointyPath.get('id')))
|
|
|
|
|
|
'''
|
|
Transformations often lead to wrong stroke widths or mis-rendering in end software. The best we
|
|
can do with a final SVG is to remove all relative translations, rotations and scalings. We should
|
|
apply absolute coordinates only.
|
|
'''
|
|
if so.checks == "check_all" or so.transformations is True:
|
|
inkex.utils.debug("\n---------- Transformations - should be applied to absolute")
|
|
transformations = []
|
|
for element in shapes:
|
|
if element.get('transform') is not None:
|
|
transformations.append(element)
|
|
if self.options.show_issues_only is False:
|
|
inkex.utils.debug("{} transformation in total".format(len(transformations)))
|
|
for transformation in transformations:
|
|
inkex.utils.debug("transformation in id={}".format(transformation.get('id')))
|
|
|
|
'''
|
|
Really short paths can cause issues with laser cutter mechanics and should be avoided to
|
|
have healthier stepper motor belts, etc.
|
|
'''
|
|
if so.checks == "check_all" or so.short_paths is True:
|
|
inkex.utils.debug("\n---------- Short paths (< {} mm)".format(so.short_paths_min))
|
|
shortPaths = []
|
|
totalLength = 0
|
|
totalDropLength = 0
|
|
for element in shapes:
|
|
if isinstance(element, inkex.PathElement):
|
|
slengths, stotal = csplength(element.path.transform(element.composed_transform()).to_superpath())
|
|
totalLength += stotal
|
|
if stotal < self.svg.unittouu(str(so.short_paths_min) + "mm"):
|
|
shortPaths.append([element, stotal])
|
|
totalDropLength += stotal
|
|
if self.options.show_issues_only is False:
|
|
inkex.utils.debug("{} short paths in total".format(len(shortPaths)))
|
|
if totalLength > 0:
|
|
inkex.utils.debug("{:0.2f}% of total ({:0.2f} mm /{:0.2f} mm)".format(totalDropLength / totalLength, self.svg.uutounit(str(totalDropLength), "mm"), self.svg.uutounit(str(totalLength), "mm")))
|
|
for shortPath in shortPaths:
|
|
inkex.utils.debug("id={}, length={}mm".format(shortPath[0].get('id'), round(self.svg.uutounit(str(shortPath[1]), "mm"), 3)))
|
|
|
|
|
|
'''
|
|
Shapes like rectangles, ellipses, arcs, spirals should be converted to svg:path to have more
|
|
convenience in the file
|
|
'''
|
|
if so.checks == "check_all" or so.non_path_shapes is True:
|
|
inkex.utils.debug("\n---------- Non-path shapes - should be converted to paths")
|
|
nonPathShapes = []
|
|
for element in shapes:
|
|
if not isinstance(element, inkex.PathElement) and not isinstance(element, inkex.Group):
|
|
nonPathShapes.append(element)
|
|
if self.options.show_issues_only is False:
|
|
inkex.utils.debug("{} non-path shapes in total".format(len(nonPathShapes)))
|
|
for nonPathShape in nonPathShapes:
|
|
inkex.utils.debug("id={}".format(nonPathShape.get('id')))
|
|
|
|
exit(0)
|
|
|
|
if __name__ == '__main__':
|
|
LaserCheck().run() |