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# Purpose: build header var tables
# Copyright (C) 2011-2022, Manfred Moitzi
# License: MIT License
from collections import OrderedDict
import ezdxf
from ezdxf.lldxf.loader import load_dxf_structure
TABLEPRELUDE = """# auto-generated by buildheadertables.py - do not edit
# Copyright (C) 2019, Manfred Moitzi
# License: MIT License
from functools import partial
from ezdxf.lldxf.hdrvars import SingleValue, Point2D, Point3D, HeaderVarDef
from ezdxf.lldxf.const import DXF12, DXF2000, DXF2004, DXF2007, DXF2010, DXF2013, DXF2018
HEADER_VAR_MAP = {
"""
TABLEEPILOGUE = "}\n"
DXF_FILES = [
"DXF12",
"DXF2000",
"DXF2004",
"DXF2007",
"DXF2010",
"DXF2013",
"DXF2018",
]
TEMPLATES = ezdxf.options.test_files_path / "templates"
def write_table(filename, vars):
def write_var(var):
value = var.value
if isinstance(value, tuple):
if len(value) == 2:
factory = "Point2D"
else:
factory = "Point3D"
else:
factory = "partial(SingleValue, code=%d)" % var.code
if isinstance(value, str):
default = "'{}'".format(value)
else:
default = value
fp.write(
" '{v.name}': HeaderVarDef(\n"
" name='{v.name}',\n"
" code={v.code},\n"
" factory={f}, \n"
" mindxf={v.mindxf},\n"
" maxdxf={v.maxdxf},\n"
" priority={v.priority},\n"
" default={default}),\n".format(
v=var, f=factory, default=default
)
)
with open(filename, "wt") as fp:
fp.write(TABLEPRELUDE)
for var in vars:
write_var(var)
fp.write(TABLEEPILOGUE)
class HeaderVar:
def __init__(self, name, code, value, priority, dxf):
self.name = name
self.code = code
self.value = value
self.priority = priority
self.mindxf = dxf
self.maxdxf = dxf
def set_dxf(self, dxf):
if self.mindxf:
if dxf < self.mindxf:
self.mindxf = dxf
else:
self.mindxf = dxf
if self.maxdxf:
if dxf > self.maxdxf:
self.maxdxf = dxf
else:
self.maxdxf = dxf
def add_vars(header, vars, dxf):
priority = 0
for name_tag, value_tag in zip(header[::2], header[1::2]):
name = name_tag.value
code = value_tag.code
value = value_tag.value
h = vars.get(name, None)
if h:
h.set_dxf(dxf)
else:
vars[name] = HeaderVar(name, code, value, priority, dxf)
priority += 100
def read(stream):
"""Open an existing drawing."""
from ezdxf.lldxf.tagger import ascii_tags_loader, tag_compiler
tagger = list(ascii_tags_loader(stream))
return tag_compiler(iter(tagger))
def get_tagger(filename):
from ezdxf.lldxf.validator import is_dxf_file
from ezdxf.filemanagement import dxf_file_info
if not is_dxf_file(filename):
raise IOError("File '{}' is not a DXF file.".format(filename))
info = dxf_file_info(filename)
with open(
filename, mode="rt", encoding=info.encoding, errors="ignore"
) as fp:
tagger = read(fp)
return tagger
def get_header_section(filename):
tagger = list(get_tagger(filename))
sections = load_dxf_structure(tagger)
return sections.get("HEADER", [None])[
0
] # all tags in the first DXF structure entity
def main():
header_vars = OrderedDict()
for dxf in reversed(DXF_FILES):
header = get_header_section(TEMPLATES / f"{dxf}.dxf")
add_vars(header[2:], header_vars, dxf)
write_table(
TEMPLATES / "headervars.py",
sorted(header_vars.values(), key=lambda v: v.priority),
)
if __name__ == "__main__":
main()
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