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Umut CANandClaude Opus 5 56e6ff7206 feat(sheet): ISO 5457 frames and ISO 7200 title blocks for A4-A0
SECTION 24 opens with sheet_frame and titleblock_apply.

engineering/sheet/frames.py transcribes ISO 216's trimmed sizes, ISO 5457's
20 mm filing margin and 10 mm edges, the grid reference system (an even number
of divisions per side, that side of the frame over 50 mm; letters from the top,
numbers from the left), the centring marks (trimmed edge to 5 mm inside the
frame) and the 10 x 5 mm corner trimming marks. Every one of those numbers is
pinned by a test against the clause it comes from, because a wrong margin is
visible on every drawing this server makes.

engineering/sheet/titleblock.py draws the ISO 7200 block -- 180 mm wide, which
is exactly the drawing-space width of a portrait A4, which is why one block
fits every size -- and carries the ISO 128-30 projection-angle symbol. Which
symbol is which is derived rather than remembered: first-angle projection puts
the view seen from the left on the right, and the view of the cone from its
small end is the small circle inside the large one, so first angle draws the
cone left and the circles right.

The old A3 module folds in. apply_iso_a3_titleblock now forwards to
apply_titleblock(size="A3", projection=None, zones=False, marks=False), which is
the geometry it always drew, and tests/test_engineering_titleblock.py passes
unchanged -- that is the regression gate for the fold.

No new ActiveX member is called: both tools reach the drawing only through
contract members the A3 title block has used on both engines since v1.0
(entity_create_polyline / _line / _circle / _text, layout_list,
layout_set_current), so there was nothing to probe live.

Declared, not glossed: the zone divisions drawn here are equal, so ISO 5457's
allowance for shorter corner fields is not implemented; the division counts,
which are what a zone reference quotes, are the standard's. ISO 7200's full
optional-field list is not transcribed, only the fields this block has a cell
for. Coverage is A4-A0; an unknown size is refused by name with the five it has.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
2026-09-22 19:03:14 +03:00

102 lines
2.7 KiB
Python

"""ISO 7200 / A3 title block -- the historical entry point.
The layout moved to `engineering.sheet.titleblock`, which draws every ISO 5457
size from A4 to A0. What is left here is the A3 alias: `apply_iso_a3_titleblock`
forwards to `apply_titleblock(size="A3", projection=None, zones=False,
marks=False)`, which is bit-for-bit the geometry this module drew before -- no
projection-angle symbol, no zone grid, no trimming marks -- so every caller and
every test that pinned it keeps working. The module-level constants are
re-exported for the same reason.
"""
from __future__ import annotations
from typing import TYPE_CHECKING
from engineering.sheet.frames import (
EDGE_MARGIN,
FILING_MARGIN,
SHEET_LAYER,
SHEET_TEXT_LAYER,
sheet_size,
)
from engineering.sheet.titleblock import (
LABEL_HEIGHT,
ROW1_H,
ROW2_H,
ROW3_H,
ROW4_H,
TB_HEIGHT,
TB_WIDTH,
TITLE_HEIGHT,
VALUE_HEIGHT,
TitleBlockMetadata,
apply_titleblock,
)
if TYPE_CHECKING:
from backends.base import AutoCADBackend
__all__ = [
"BOTTOM_MARGIN",
"LABEL_HEIGHT",
"LAYER_BORDER",
"LAYER_TEXT",
"LEFT_MARGIN",
"RIGHT_MARGIN",
"ROW1_H",
"ROW2_H",
"ROW3_H",
"ROW4_H",
"SHEET_H",
"SHEET_W",
"TB_HEIGHT",
"TB_WIDTH",
"TITLE_HEIGHT",
"TOP_MARGIN",
"VALUE_HEIGHT",
"TitleBlockMetadata",
"apply_iso_a3_titleblock",
]
SHEET_W, SHEET_H = sheet_size("A3", "landscape")
LEFT_MARGIN = FILING_MARGIN
RIGHT_MARGIN = EDGE_MARGIN
TOP_MARGIN = EDGE_MARGIN
BOTTOM_MARGIN = EDGE_MARGIN
LAYER_BORDER = SHEET_LAYER
LAYER_TEXT = SHEET_TEXT_LAYER
async def apply_iso_a3_titleblock(
backend: AutoCADBackend,
*,
metadata: TitleBlockMetadata,
origin: tuple[float, float] = (0.0, 0.0),
layout: str | None = None,
) -> dict:
"""Draw a 420x297 ISO 7200 title block at `origin` (lower-left of sheet).
With `layout`, the sheet is drawn on that paper-space layout -- which is
where a title block belongs, since the border frames the printed sheet
rather than the model. The caller's current space is restored afterwards, so
asking for a sheet border does not silently move them onto the sheet.
Without `layout` it draws in whatever space is current, as it always did.
Equivalent to `titleblock_apply(size="A3")` with the projection-angle
symbol, the zone grid and the trimming marks switched off. Reach for
`titleblock_apply` for any other size, or for the symbol.
"""
return await apply_titleblock(
backend,
size="A3",
metadata=metadata,
origin=origin,
orientation="landscape",
projection=None,
frame=True,
zones=False,
marks=False,
layout=layout,
)