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# Purpose: handle linetypes table
# Created: 06.01.2014
# Copyright (C) 2014, Manfred Moitzi
# License: MIT License
__author__ = "mozman <mozman@gmx.at>"
from .dxfentity import DXFEntity
from .layers import Table
from .dxfattr import DXFAttr, DXFAttributes, DefSubclass
class Linetype(object):
def __init__(self, wrapper):
self.name = wrapper.get_dxf_attrib('name')
self.description = wrapper.get_dxf_attrib('description')
self.length = wrapper.get_dxf_attrib('length') # overall length of the pattern
self.pattern = wrapper.get_pattern() # list of floats: value>0: line, value<0: gap, value=0: dot
class LinetypeTable(Table):
name = 'linetypes'
@staticmethod
def from_tags(tags, drawing):
dxfversion = drawing.dxfversion
styles = LinetypeTable()
for entrytags in styles._classified_tags(tags):
dxfstyle = styles.wrap(entrytags, dxfversion)
styles._table_entries[dxfstyle.get_dxf_attrib('name')] = Linetype(dxfstyle)
return styles
@staticmethod
def wrap(tags, dxfversion):
return DXF12Linetype(tags) if dxfversion == "AC1009" else DXF13Linetype(tags)
class DXF12Linetype(DXFEntity):
DXFATTRIBS = DXFAttributes(DefSubclass(None, {
'handle': DXFAttr(5),
'name': DXFAttr(2),
'description': DXFAttr(3),
'length': DXFAttr(40),
'items': DXFAttr(73),
}))
def get_pattern(self):
items = self.get_dxf_attrib('items')
if items == 0:
return []
else:
tags = self.tags.noclass
return [pattern_tag.value for pattern_tag in tags.find_all(49)]
none_subclass = DefSubclass(None, {'handle': DXFAttr(5)})
symbol_subclass = DefSubclass('AcDbSymbolTableRecord', {})
linetype_subclass = DefSubclass('AcDbLinetypeTableRecord', {
'name': DXFAttr(2),
'description': DXFAttr(3),
'length': DXFAttr(40),
'items': DXFAttr(73),
})
class DXF13Linetype(DXF12Linetype):
DXFATTRIBS = DXFAttributes(none_subclass, symbol_subclass, linetype_subclass)
def get_pattern(self):
items = self.get_dxf_attrib('items')
if items == 0:
return []
else:
tags = self.tags.get_subclass('AcDbLinetypeTableRecord')
return [pattern_tag.value for pattern_tag in tags.find_all(49)]
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