1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
# Purpose: handle layers
# Created: 21.07.12
# Copyright (C) 2012, Manfred Moitzi
# License: MIT License
__author__ = "mozman <mozman@gmx.at>"
from .tags import TagGroups
from .tags import ClassifiedTags
from .dxfentity import DXFEntity
from .dxfattr import DXFAttr, DXFAttributes, DefSubclass
class Layer(object):
def __init__(self, wrapper):
self.name = wrapper.get_dxf_attrib('name')
self.color = wrapper.get_color()
self.linetype = wrapper.get_dxf_attrib('linetype')
self.locked = wrapper.is_locked()
self.frozen = wrapper.is_frozen()
self.on = wrapper.is_on()
class Table(object):
def __init__(self):
self._table_entries = dict()
# start public interface
def get(self, name, default=KeyError):
try:
return self._table_entries[name]
except KeyError:
if default is KeyError:
raise
else:
return default
def __getitem__(self, item):
return self.get(item)
def __contains__(self, name):
return name in self._table_entries
def __iter__(self):
return iter(self._table_entries.values())
def __len__(self):
return len(self._table_entries)
def names(self):
return sorted(self._table_entries.keys())
# end public interface
def _classified_tags(self, tags):
groups = TagGroups(tags)
assert groups.get_name(0) == 'TABLE'
assert groups.get_name(-1) == 'ENDTAB'
for entrytags in groups[1:-1]:
yield ClassifiedTags(entrytags)
class LayerTable(Table):
name = 'layers'
@staticmethod
def from_tags(tags, drawing):
dxfversion = drawing.dxfversion
layers = LayerTable()
for entrytags in layers._classified_tags(tags):
dxflayer = layers.wrap(entrytags, dxfversion)
layers._table_entries[dxflayer.get_dxf_attrib('name')] = Layer(dxflayer)
return layers
@staticmethod
def wrap(tags, dxfversion):
return DXF12Layer(tags) if dxfversion == "AC1009" else DXF13Layer(tags)
class DXF12Layer(DXFEntity):
DXFATTRIBS = DXFAttributes(DefSubclass(None, {
'handle': DXFAttr(5),
'name': DXFAttr(2),
'flags': DXFAttr(70),
'color': DXFAttr(62), # dxf color index, if < 0 layer is off
'linetype': DXFAttr(6),
}))
LOCK = 0b00000100
FROZEN = 0b00000001
def is_frozen(self):
return self.get_dxf_attrib('flags') & DXF12Layer.FROZEN > 0
def is_locked(self):
return self.get_dxf_attrib('flags') & DXF12Layer.LOCK > 0
def is_off(self):
return self.get_dxf_attrib('color') < 0
def is_on(self):
return not self.is_off()
def get_color(self):
return abs(self.get_dxf_attrib('color'))
none_subclass = DefSubclass(None, {'handle': DXFAttr(5)})
symbol_subclass = DefSubclass('AcDbSymbolTableRecord', {})
layer_subclass = DefSubclass('AcDbLayerTableRecord', {
'name': DXFAttr(2), # layer name
'flags': DXFAttr(70),
'color': DXFAttr(62), # dxf color index
'linetype': DXFAttr(6), # linetype name
})
class DXF13Layer(DXF12Layer):
DXFATTRIBS = DXFAttributes(none_subclass, symbol_subclass, layer_subclass)
|
