def _load_section_dict(self, sections: loader.SectionDict) -> None:
""" Internal API to load a DXF document from a section dict. """
self.is_loading = True
# Create header section:
# All header tags are the first DXF structure entity
header_entities = sections.get('HEADER', [None])[0]
if header_entities is None:
# Create default header, files without header are by default DXF R12
self.header = HeaderSection.new(dxfversion=DXF12)
else:
self.header = HeaderSection.load(header_entities)
self._dxfversion: str = self.header.get('$ACADVER', DXF12)
# Store original DXF version of loaded file.
self._loaded_dxfversion = self._dxfversion
# Content encoding:
self.encoding = toencoding(self.header.get('$DWGCODEPAGE',
'ANSI_1252'))
# Set handle seed:
seed: str = self.header.get('$HANDSEED', str(self.entitydb.handles))
self.entitydb.handles.reset(_validate_handle_seed(seed))
# Store all necessary DXF entities in the entity database:
loader.load_and_bind_dxf_content(sections, self)
# End of 1. loading stage, all entities of the DXF file are
# stored in the entity database.
# Create sections:
self.classes = ClassesSection(self, sections.get('CLASSES', None))
self.tables = TablesSection(self, sections.get('TABLES', None))
# Create *Model_Space and *Paper_Space BLOCK_RECORDS
# BlockSection setup takes care about the rest:
self._create_required_block_records()
# At this point all table entries are required:
self.blocks = BlocksSection(self, sections.get('BLOCKS', None))
self.entities = EntitySection(self, sections.get('ENTITIES', None))
self.objects = ObjectsSection(self, sections.get('OBJECTS', None))
# only DXF R2013+
self.acdsdata = AcDsDataSection(self, sections.get('ACDSDATA', None))
# Store unmanaged sections as raw tags:
for name, data in sections.items():
if name not in const.MANAGED_SECTIONS:
self.stored_sections.append(StoredSection(data))
# Objects section is not initialized!
self._2nd_loading_stage()
# DXF version upgrades:
if self.dxfversion < DXF12:
logger.info('DXF version upgrade to DXF R12.')
self.dxfversion = DXF12
if self.dxfversion == DXF12:
self.tables.create_table_handles()
if self.dxfversion in (DXF13, DXF14):
logger.info('DXF version upgrade to DXF R2000.')
self.dxfversion = DXF2000
self.create_all_arrow_blocks()
# Objects section setup:
self.rootdict = self.objects.rootdict
# Create missing management tables (DICTIONARY):
self.objects.setup_objects_management_tables(self.rootdict)
# Setup modelspace- and paperspace layouts:
self.layouts = Layouts.load(self)
# Additional work is common to the new and load process:
self.is_loading = False
self._finalize_setup()
def _load(self, tagger: Iterable['DXFTag']):
sections = load_dxf_structure(
tagger) # load complete DXF entity structure
try: # discard section THUMBNAILIMAGE
del sections['THUMBNAILIMAGE']
except KeyError:
pass
# -----------------------------------------------------------------------------------
# create header section:
# all header tags are the first DXF structure entity
header_entities = sections.get('HEADER', [None])[0]
if header_entities is None:
# create default header, files without header are by default DXF R12
self.header = HeaderSection.new(dxfversion=DXF12)
else:
self.header = HeaderSection.load(header_entities)
# -----------------------------------------------------------------------------------
# missing $ACADVER defaults to DXF R12
self._dxfversion = self.header.get('$ACADVER', DXF12) # type: str
self._loaded_dxfversion = self._dxfversion # save dxf version of loaded file
self.encoding = toencoding(self.header.get(
'$DWGCODEPAGE', 'ANSI_1252')) # type: str # read/write
# get handle seed
seed = self.header.get('$HANDSEED',
str(self.entitydb.handles)) # type: str
# setup handles
self.entitydb.handles.reset(seed)
# store all necessary DXF entities in the drawing database
fill_database(sections, self.dxffactory)
# all handles used in the DXF file are known at this point
# -----------------------------------------------------------------------------------
# create sections:
self.classes = ClassesSection(self, sections.get('CLASSES', None))
self.tables = TablesSection(self, sections.get('TABLES', None))
# create *Model_Space and *Paper_Space BLOCK_RECORDS
# BlockSection setup takes care about the rest
self._create_required_block_records()
# table records available
self.blocks = BlocksSection(self, sections.get('BLOCKS', None))
self.entities = EntitySection(self, sections.get('ENTITIES', None))
self.objects = ObjectsSection(self, sections.get('OBJECTS', None))
# only valid for DXF R2013 and later
self.acdsdata = AcDsDataSection(self, sections.get('ACDSDATA', None))
for name, data in sections.items():
if name not in MANAGED_SECTIONS:
self.stored_sections.append(StoredSection(data))
# -----------------------------------------------------------------------------------
if self.dxfversion < DXF12:
# upgrade to DXF R12
logger.info('Upgrading drawing to DXF R12.')
self.dxfversion = DXF12
# DIMSTYLE: ezdxf uses names for blocks, linetypes and text style as internal data, handles are set at export
# requires BLOCKS and TABLES section!
self.tables.resolve_dimstyle_names()
if self.dxfversion == DXF12:
# TABLE requires in DXF12 no handle and has no owner tag, but DXF R2000+, requires a TABLE with handle
# and each table entry has an owner tag, pointing to the TABLE entry
self.tables.create_table_handles()
if self.dxfversion in (DXF13, DXF14):
# upgrade to DXF R2000
self.dxfversion = DXF2000
self.rootdict = self.objects.rootdict
self.objects.setup_objects_management_tables(
self.rootdict) # create missing tables
self.layouts = Layouts.load(self)
self._finalize_setup()