1 files changed, 74 insertions, 0 deletions
diff --git a/io_import_dxf/dxfgrabber/linetypes.py b/io_import_dxf/dxfgrabber/linetypes.py
new file mode 100755
index 00000000..3e2c877e
--- /dev/null
+++ b/io_import_dxf/dxfgrabber/linetypes.py
@@ -0,0 +1,74 @@
+# 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)]