89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
# Copyright (c) 2020-2021, Manfred Moitzi
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# License: MIT License
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from typing import Dict
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from ezdxf.document import Drawing
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from ezdxf.tools import codepage
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from ezdxf.sections.header import HeaderSection
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from ezdxf.sections.classes import ClassesSection
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from ezdxf.sections.tables import TablesSection
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from ezdxf.sections.blocks import BlocksSection
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from ezdxf.sections.entities import EntitySection
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from ezdxf.sections.objects import ObjectsSection
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from ezdxf.sections.acdsdata import AcDsDataSection
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from .const import *
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from .fileheader import FileHeader
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from .header_section import load_header_section
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from .classes_section import load_classes_section
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__all__ = ["readfile", "load"]
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def readfile(filename: str, crc_check=False) -> "Drawing":
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data = open(filename, "rb").read()
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return load(data, crc_check)
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def load(data: bytes, crc_check=False) -> Drawing:
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doc = DwgDocument(data, crc_check=crc_check)
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doc.load()
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return doc.doc
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class DwgDocument:
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def __init__(self, data: Bytes, crc_check=False):
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self.data = memoryview(data)
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self.crc_check = crc_check
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self.specs = FileHeader(data, crc_check=crc_check)
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self.doc: Drawing = self._setup_doc()
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# Store DXF object types by class number:
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self.dxf_object_types: Dict[int, str] = dict()
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def _setup_doc(self) -> Drawing:
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doc = Drawing(dxfversion=self.specs.version)
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doc.encoding = self.specs.encoding
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doc.header = HeaderSection.new()
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# Setup basic header variables not stored in the header section of the DWG file.
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doc.header["$ACADVER"] = self.specs.version
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doc.header["$ACADMAINTVER"] = self.specs.maintenance_release_version
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doc.header["$DWGCODEPAGE"] = codepage.tocodepage(self.specs.encoding)
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doc.classes = ClassesSection(doc)
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# doc.tables = TablesSection(doc)
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# doc.blocks = BlocksSection(doc)
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# doc.entities = EntitySection(doc)
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# doc.objects = ObjectsSection(doc)
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# doc.acdsdata = AcDsDataSection(doc)
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return doc
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def load(self):
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self.load_header()
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self.load_classes()
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self.load_objects()
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self.store_objects()
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def load_header(self) -> None:
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hdr_section = load_header_section(self.specs, self.data, self.crc_check)
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hdr_vars = hdr_section.load_header_vars()
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self.set_header_vars(hdr_vars)
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def set_header_vars(self, hdr_vars: Dict):
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pass
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def load_classes(self) -> None:
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cls_section = load_classes_section(
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self.specs, self.data, self.crc_check
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)
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for class_num, dxfclass in cls_section.load_classes():
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self.doc.classes.register(dxfclass)
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self.dxf_object_types[class_num] = dxfclass.dxf.name
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def load_objects(self) -> None:
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pass
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def store_objects(self) -> None:
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pass
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