refactor: excel parse

server/venv/lib/python3.9/site-packages/ezdxf/tools/__init__.py

@@ -0,0 +1,161 @@
+# Copyright (c) 2015-2024, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Iterable, TypeVar, Iterator, Any
+from uuid import uuid4
+import functools
+import html
+from .juliandate import juliandate, calendardate
+from .binarydata import hex_strings_to_bytes, bytes_to_hexstr
+
+escape = functools.partial(html.escape, quote=True)
+
+
+def float2transparency(value: float) -> int:
+    """
+    Returns DXF transparency value as integer in the range from ``0`` to ``255``, where
+    ``0`` is 100% transparent and ``255`` is opaque.
+
+    Args:
+        value: transparency value as float in the range from ``0`` to ``1``, where ``0``
+           is opaque and ``1`` is 100% transparency.
+
+    """
+    return int((1.0 - float(value)) * 255) | 0x02000000
+
+
+def transparency2float(value: int) -> float:
+    """
+    Returns transparency value as float from ``0`` to ``1``, ``0`` for no transparency
+    (opaque) and ``1`` for 100% transparency.
+
+    Args:
+        value: DXF integer transparency value, ``0`` for 100% transparency and ``255``
+            for opaque
+
+    """
+    # 255 -> 0.
+    # 0 -> 1.
+    return 1.0 - float(int(value) & 0xFF) / 255.0
+
+
+def set_flag_state(flags: int, flag: int, state: bool = True) -> int:
+    """Set/clear binary `flag` in data `flags`.
+
+    Args:
+        flags: data value
+        flag: flag to set/clear
+        state: ``True`` for setting, ``False`` for clearing
+
+    """
+    if state:
+        flags = flags | flag
+    else:
+        flags = flags & ~flag
+    return flags
+
+
+def guid() -> str:
+    """Returns a general unique ID, based on :func:`uuid.uuid4`.
+
+    This function creates a GUID for the header variables $VERSIONGUID and
+    $FINGERPRINTGUID, which matches the AutoCAD pattern
+    ``{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}``.
+
+    """
+    return "{" + str(uuid4()).upper() + "}"
+
+
+T = TypeVar("T")
+
+
+def take2(iterable: Iterable[T]) -> Iterator[tuple[T, T]]:
+    """Iterate `iterable` as non-overlapping pairs.
+
+    :code:`take2('ABCDEFGH') -> AB CD EF GH`
+
+    """
+    sentinel = object()
+    store: Any = sentinel
+    for item in iterable:
+        if store is sentinel:
+            store = item
+        else:
+            yield store, item
+            store = sentinel
+
+
+def pairwise(iterable: Iterable[T], close=False) -> Iterator[tuple[T, T]]:
+    """Iterate `iterable` as consecutive overlapping pairs.
+    This is similar to ``itertools.pairwise()`` in Python 3.10 but with `close` option.
+
+    :code:`polygon_segments('ABCDEFG') -> AB BC CD DE EF FG`
+    :code:`polygon_segments('ABCDEFG', True) -> AB BC CD DE EF FG GA`
+
+    """
+    sentinel = object()
+    first: Any = sentinel
+    store: Any = sentinel
+    item: Any = sentinel
+    for item in iterable:
+        if store is sentinel:
+            store = item
+            first = item
+        else:
+            yield store, item
+            store = item
+    if close and first is not sentinel and item is not first:
+        yield item, first
+
+
+def suppress_zeros(s: str, leading: bool = False, trailing: bool = True):
+    """Suppress trailing and/or leading ``0`` of string `s`.
+
+    Args:
+         s: data string
+         leading: suppress leading ``0``
+         trailing: suppress trailing ``0``
+
+    """
+    # is anything to do?
+    if (not leading) and (not trailing):
+        return s
+
+    # if `s` represents zero
+    if float(s) == 0.0:
+        return "0"
+
+    # preserve sign
+    if s[0] in "-+":
+        sign = s[0]
+        s = s[1:]
+    else:
+        sign = ""
+
+    # strip zeros
+    if leading:
+        s = s.lstrip("0")
+    if trailing and "." in s:
+        s = s.rstrip("0")
+
+    # remove comma if no decimals follow
+    if s[-1] in ".,":
+        s = s[:-1]
+
+    return sign + s
+
+
+def normalize_text_angle(angle: float, fix_upside_down=True) -> float:
+    """
+    Normalizes text `angle` to the range from 0 to 360 degrees and fixes upside down text angles.
+
+    Args:
+        angle: text angle in degrees
+        fix_upside_down: rotate upside down text angle about 180 degree
+
+    """
+    angle = angle % 360.0  # normalize angle (0 .. 360)
+    if fix_upside_down and (90 < angle <= 270):  # flip text orientation
+        angle -= 180
+        angle = angle % 360.0  # normalize again
+    return angle

server/venv/lib/python3.9/site-packages/ezdxf/tools/analyze.py

@@ -0,0 +1,576 @@
+# Copyright (c) 2021-2022, Manfred Moitzi
+# License: MIT License
+# Debugging tools to analyze DXF entities.
+from __future__ import annotations
+from typing import Iterable, Sequence, Optional
+import textwrap
+
+import ezdxf
+from ezdxf import colors
+from ezdxf.math import Vec2
+from ezdxf.lldxf import const
+from ezdxf.enums import TextEntityAlignment
+from ezdxf.tools.debug import print_bitmask
+from ezdxf.render.mleader import MLeaderStyleOverride, OVERRIDE_FLAG
+from ezdxf.entities import (
+    EdgePath,
+    PolylinePath,
+    LineEdge,
+    ArcEdge,
+    EllipseEdge,
+    SplineEdge,
+    mleader,
+)
+from ezdxf.entities.polygon import DXFPolygon
+
+EDGE_START_MARKER = "EDGE_START_MARKER"
+EDGE_END_MARKER = "EDGE_END_MARKER"
+HATCH_LAYER = "HATCH"
+POLYLINE_LAYER = "POLYLINE_MARKER"
+LINE_LAYER = "LINE_MARKER"
+ARC_LAYER = "ARC_MARKER"
+ELLIPSE_LAYER = "ELLIPSE_MARKER"
+SPLINE_LAYER = "SPLINE_MARKER"
+
+
+class HatchAnalyzer:
+    def __init__(
+        self,
+        *,
+        marker_size: float = 1.0,
+        angle: float = 45,
+    ):
+        self.marker_size = marker_size
+        self.angle = angle
+        self.doc = ezdxf.new()
+        self.msp = self.doc.modelspace()
+        self.init_layers()
+        self.init_markers()
+
+    def init_layers(self):
+        self.doc.layers.add(POLYLINE_LAYER, color=colors.YELLOW)
+        self.doc.layers.add(LINE_LAYER, color=colors.RED)
+        self.doc.layers.add(ARC_LAYER, color=colors.GREEN)
+        self.doc.layers.add(ELLIPSE_LAYER, color=colors.MAGENTA)
+        self.doc.layers.add(SPLINE_LAYER, color=colors.CYAN)
+        self.doc.layers.add(HATCH_LAYER)
+
+    def init_markers(self):
+        blk = self.doc.blocks.new(EDGE_START_MARKER)
+        attribs = {"layer": "0"}  # from INSERT
+        radius = self.marker_size / 2.0
+        height = radius
+
+        # start marker: 0-- name
+        blk.add_circle(
+            center=(0, 0),
+            radius=radius,
+            dxfattribs=attribs,
+        )
+        text_start = radius * 4
+        blk.add_line(
+            start=(radius, 0),
+            end=(text_start - radius / 2.0, 0),
+            dxfattribs=attribs,
+        )
+        text = blk.add_attdef(
+            tag="NAME",
+            dxfattribs=attribs,
+        )
+        text.dxf.height = height
+        text.set_placement(
+            (text_start, 0), align=TextEntityAlignment.MIDDLE_LEFT
+        )
+
+        # end marker: name --X
+        blk = self.doc.blocks.new(EDGE_END_MARKER)
+        attribs = {"layer": "0"}  # from INSERT
+        blk.add_line(
+            start=(-radius, -radius),
+            end=(radius, radius),
+            dxfattribs=attribs,
+        )
+        blk.add_line(
+            start=(-radius, radius),
+            end=(radius, -radius),
+            dxfattribs=attribs,
+        )
+        text_start = -radius * 4
+        blk.add_line(
+            start=(-radius, 0),
+            end=(text_start + radius / 2.0, 0),
+            dxfattribs=attribs,
+        )
+        text = blk.add_attdef(
+            tag="NAME",
+            dxfattribs=attribs,
+        )
+        text.dxf.height = height
+        text.set_placement(
+            (text_start, 0), align=TextEntityAlignment.MIDDLE_RIGHT
+        )
+
+    def export(self, name: str) -> None:
+        self.doc.saveas(name)
+
+    def add_hatch(self, hatch: DXFPolygon) -> None:
+        hatch.dxf.discard("extrusion")
+        hatch.dxf.layer = HATCH_LAYER
+        self.msp.add_foreign_entity(hatch)
+
+    def add_boundary_markers(self, hatch: DXFPolygon) -> None:
+        hatch.dxf.discard("extrusion")
+        path_num: int = 0
+
+        for p in hatch.paths:
+            path_num += 1
+            if isinstance(p, PolylinePath):
+                self.add_polyline_markers(p, path_num)
+            elif isinstance(p, EdgePath):
+                self.add_edge_markers(p, path_num)
+            else:
+                raise TypeError(f"unknown boundary path type: {type(p)}")
+
+    def add_start_marker(self, location: Vec2, name: str, layer: str) -> None:
+        self.add_marker(EDGE_START_MARKER, location, name, layer)
+
+    def add_end_marker(self, location: Vec2, name: str, layer: str) -> None:
+        self.add_marker(EDGE_END_MARKER, location, name, layer)
+
+    def add_marker(
+        self, blk_name: str, location: Vec2, name: str, layer: str
+    ) -> None:
+        blkref = self.msp.add_blockref(
+            name=blk_name,
+            insert=location,
+            dxfattribs={
+                "layer": layer,
+                "rotation": self.angle,
+            },
+        )
+        blkref.add_auto_attribs({"NAME": name})
+
+    def add_polyline_markers(self, p: PolylinePath, num: int) -> None:
+        self.add_start_marker(
+            Vec2(p.vertices[0]), f"Poly-S({num})", POLYLINE_LAYER
+        )
+        self.add_end_marker(
+            Vec2(p.vertices[0]), f"Poly-E({num})", POLYLINE_LAYER
+        )
+
+    def add_edge_markers(self, p: EdgePath, num: int) -> None:
+        edge_num: int = 0
+        for edge in p.edges:
+            edge_num += 1
+            name = f"({num}.{edge_num})"
+            if isinstance(
+                edge,
+                LineEdge,
+            ):
+                self.add_line_edge_markers(edge, name)
+            elif isinstance(edge, ArcEdge):
+                self.add_arc_edge_markers(edge, name)
+            elif isinstance(edge, EllipseEdge):
+                self.add_ellipse_edge_markers(edge, name)
+            elif isinstance(edge, SplineEdge):
+                self.add_spline_edge_markers(edge, name)
+            else:
+                raise TypeError(f"unknown edge type: {type(edge)}")
+
+    def add_line_edge_markers(self, line: LineEdge, name: str) -> None:
+        self.add_start_marker(line.start, "Line-S" + name, LINE_LAYER)
+        self.add_end_marker(line.end, "Line-E" + name, LINE_LAYER)
+
+    def add_arc_edge_markers(self, arc: ArcEdge, name: str) -> None:
+        self.add_start_marker(arc.start_point, "Arc-S" + name, ARC_LAYER)
+        self.add_end_marker(arc.end_point, "Arc-E" + name, ARC_LAYER)
+
+    def add_ellipse_edge_markers(self, ellipse: EllipseEdge, name: str) -> None:
+        self.add_start_marker(
+            ellipse.start_point, "Ellipse-S" + name, ELLIPSE_LAYER
+        )
+        self.add_end_marker(
+            ellipse.end_point, "Ellipse-E" + name, ELLIPSE_LAYER
+        )
+
+    def add_spline_edge_markers(self, spline: SplineEdge, name: str) -> None:
+        if len(spline.control_points):
+            # Assuming a clamped B-spline, because this is the only practical
+            # usable B-spline for edges.
+            self.add_start_marker(
+                spline.start_point, "SplineS" + name, SPLINE_LAYER
+            )
+            self.add_end_marker(
+                spline.end_point, "SplineE" + name, SPLINE_LAYER
+            )
+
+    @staticmethod
+    def report(hatch: DXFPolygon) -> list[str]:
+        return hatch_report(hatch)
+
+    @staticmethod
+    def print_report(hatch: DXFPolygon) -> None:
+        print("\n".join(hatch_report(hatch)))
+
+
+def hatch_report(hatch: DXFPolygon) -> list[str]:
+    dxf = hatch.dxf
+    style = const.ISLAND_DETECTION[dxf.hatch_style]
+    pattern_type = const.HATCH_PATTERN_TYPE[dxf.pattern_type]
+    text = [
+        f"{str(hatch)}",
+        f"   solid fill: {bool(dxf.solid_fill)}",
+        f"   pattern type: {pattern_type}",
+        f"   pattern name: {dxf.pattern_name}",
+        f"   associative: {bool(dxf.associative)}",
+        f"   island detection: {style}",
+        f"   has pattern data: {hatch.pattern is not None}",
+        f"   has gradient data: {hatch.gradient is not None}",
+        f"   seed value count: {len(hatch.seeds)}",
+        f"   boundary path count: {len(hatch.paths)}",
+    ]
+    num = 0
+    for path in hatch.paths:
+        num += 1
+        if isinstance(path, PolylinePath):
+            text.extend(polyline_path_report(path, num))
+        elif isinstance(path, EdgePath):
+            text.extend(edge_path_report(path, num))
+    return text
+
+
+def polyline_path_report(p: PolylinePath, num: int) -> list[str]:
+    path_type = ", ".join(const.boundary_path_flag_names(p.path_type_flags))
+    return [
+        f"{num}. Polyline Path, vertex count: {len(p.vertices)}",
+        f"   path type:                      {path_type}",
+    ]
+
+
+def edge_path_report(p: EdgePath, num: int) -> list[str]:
+    closed = False
+    connected = False
+    path_type = ", ".join(const.boundary_path_flag_names(p.path_type_flags))
+    edges = p.edges
+    if len(edges):
+        closed = edges[0].start_point.isclose(edges[-1].end_point)
+        connected = all(
+            e1.end_point.isclose(e2.start_point)
+            for e1, e2 in zip(edges, edges[1:])
+        )
+
+    return [
+        f"{num}. Edge Path, edge count: {len(p.edges)}",
+        f"   path type:                      {path_type}",
+        f"   continuously connected edges:   {connected}",
+        f"   closed edge loop:               {closed}",
+    ]
+
+
+MULTILEADER = "MULTILEADER_MARKER"
+POINT_MARKER = "POINT_MARKER"
+
+
+class MultileaderAnalyzer:
+    """Multileader can not be added as foreign entity to a new document.
+    Annotations have to be added to the source document.
+
+    """
+
+    def __init__(
+        self,
+        multileader: mleader.MultiLeader,
+        *,
+        marker_size: float = 1.0,
+        report_width: int = 79,
+    ):
+        self.marker_size = marker_size
+        self.report_width = report_width
+        self.multileader = multileader
+        assert self.multileader.doc is not None, "valid DXF document required"
+        self.doc = self.multileader.doc
+        self.msp = self.doc.modelspace()
+        self.init_layers()
+        self.init_markers()
+
+    def init_layers(self):
+        if self.doc.layers.has_entry(MULTILEADER):
+            return
+        self.doc.layers.add(MULTILEADER, color=colors.RED)
+
+    def init_markers(self):
+        if POINT_MARKER not in self.doc.blocks:
+            blk = self.doc.blocks.new(POINT_MARKER)
+            attribs = {"layer": "0"}  # from INSERT
+            size = self.marker_size
+            size_2 = size / 2.0
+            radius = size / 4.0
+            blk.add_circle(
+                center=(0, 0),
+                radius=radius,
+                dxfattribs=attribs,
+            )
+            blk.add_line((-size_2, 0), (size_2, 0), dxfattribs=attribs)
+            blk.add_line((0, -size_2), (0, size_2), dxfattribs=attribs)
+
+    @property
+    def context(self) -> mleader.MLeaderContext:
+        return self.multileader.context
+
+    @property
+    def mleaderstyle(self) -> Optional[mleader.MLeaderStyle]:
+        handle = self.multileader.dxf.get("style_handle")
+        return self.doc.entitydb.get(handle)  # type: ignore
+
+    def divider_line(self, symbol="-") -> str:
+        return symbol * self.report_width
+
+    def shorten_lines(self, lines: Iterable[str]) -> list[str]:
+        return [
+            textwrap.shorten(line, width=self.report_width) for line in lines
+        ]
+
+    def report(self) -> list[str]:
+        report = [
+            str(self.multileader),
+            self.divider_line(),
+            "Existing DXF attributes:",
+            self.divider_line(),
+        ]
+        report.extend(self.multileader_attributes())
+        report.extend(self.context_attributes())
+        if self.context.mtext is not None:
+            report.extend(self.mtext_attributes())
+        if self.context.block is not None:
+            report.extend(self.block_attributes())
+            if self.multileader.block_attribs:
+                report.extend(self.block_reference_attribs())
+        if self.multileader.context.leaders:
+            report.extend(self.leader_attributes())
+        if self.multileader.arrow_heads:
+            report.extend(self.arrow_heads())
+        return self.shorten_lines(report)
+
+    def print_report(self) -> None:
+        width = self.report_width
+        print()
+        print("=" * width)
+        print("\n".join(self.report()))
+        print("=" * width)
+
+    def print_overridden_properties(self):
+        print("\n".join(self.overridden_attributes()))
+
+    def overridden_attributes(self) -> list[str]:
+        multileader = self.multileader
+        style = self.mleaderstyle
+        if style is not None:
+            report = [
+                self.divider_line(),
+                f"Override attributes of {str(style)}: '{style.dxf.name}'",
+                self.divider_line(),
+            ]
+
+            override = MLeaderStyleOverride(style, multileader)
+            for name in OVERRIDE_FLAG.keys():
+                if override.is_overridden(name):
+                    report.append(f"{name}: {override.get(name)}")
+            if override.use_mtext_default_content:
+                report.append("use_mtext_default_content: 1")
+        else:
+            handle = self.multileader.dxf.get("style_handle")
+            report = [
+                self.divider_line(),
+                f"MLEADERSTYLE(#{handle}) not found",
+            ]
+        return report
+
+    def multileader_attributes(self) -> list[str]:
+        attribs = self.multileader.dxf.all_existing_dxf_attribs()
+        keys = sorted(attribs.keys())
+        return [f"{key}: {attribs[key]}" for key in keys]
+
+    def print_override_state(self):
+        flags = self.multileader.dxf.property_override_flags
+        print(f"\nproperty_override_flags:")
+        print(f"dec: {flags}")
+        print(f"hex: {hex(flags)}")
+        print_bitmask(flags)
+
+    def print_context_attributes(self):
+        print("\n".join(self.context_attributes()))
+
+    def context_attributes(self) -> list[str]:
+        context = self.context
+        if context is None:
+            return []
+        report = [
+            self.divider_line(),
+            "CONTEXT object attributes:",
+            self.divider_line(),
+            f"has MTEXT content: {yes_or_no(context.mtext)}",
+            f"has BLOCK content: {yes_or_no(context.block)}",
+            self.divider_line(),
+        ]
+        keys = [
+            key
+            for key in context.__dict__.keys()
+            if key not in ("mtext", "block", "leaders")
+        ]
+        attributes = [f"{name}: {getattr(context, name)}" for name in keys]
+        attributes.sort()
+        report.extend(attributes)
+        return self.shorten_lines(report)
+
+    def print_mtext_attributes(self):
+        print("\n".join(self.mtext_attributes()))
+
+    def mtext_attributes(self) -> list[str]:
+        report = [
+            self.divider_line(),
+            "MTEXT content attributes:",
+            self.divider_line(),
+        ]
+        mtext = self.context.mtext
+        if mtext is not None:
+            report.extend(_content_attributes(mtext))
+        return self.shorten_lines(report)
+
+    def print_block_attributes(self):
+        print("\n".join(self.block_attributes()))
+
+    def block_attributes(self) -> list[str]:
+        report = [
+            self.divider_line(),
+            "BLOCK content attributes:",
+            self.divider_line(),
+        ]
+        block = self.context.block
+        if block is not None:
+            report.extend(_content_attributes(block))
+        return self.shorten_lines(report)
+
+    def print_leader_attributes(self):
+        print("\n".join(self.leader_attributes()))
+
+    def leader_attributes(self) -> list[str]:
+        report = []
+        leaders = self.context.leaders
+        if leaders is not None:
+            for index, leader in enumerate(leaders):
+                report.extend(self._leader_attributes(index, leader))
+        return self.shorten_lines(report)
+
+    def _leader_attributes(
+        self, index: int, leader: mleader.LeaderData
+    ) -> list[str]:
+        report = [
+            self.divider_line(),
+            f"{index+1}. LEADER attributes:",
+            self.divider_line(),
+        ]
+        report.extend(_content_attributes(leader, exclude=("lines", "breaks")))
+        s = ", ".join(map(str, leader.breaks))
+        report.append(f"breaks: [{s}]")
+        if leader.lines:
+            report.extend(self._leader_lines(leader.lines))
+        return report
+
+    def _leader_lines(self, lines) -> list[str]:
+        report = []
+        for num, line in enumerate(lines):
+            report.extend(
+                [
+                    self.divider_line(),
+                    f"{num + 1}. LEADER LINE attributes:",
+                    self.divider_line(),
+                ]
+            )
+            for name, value in line.__dict__.items():
+                if name in ("vertices", "breaks"):
+                    vstr = ""
+                    if value is not None:
+                        vstr = ", ".join(map(str, value))
+                    vstr = f"[{vstr}]"
+                else:
+                    vstr = str(value)
+                report.append(f"{name}: {vstr}")
+        return report
+
+    def print_block_attribs(self):
+        print("\n".join(self.block_reference_attribs()))
+
+    def block_reference_attribs(self) -> list[str]:
+        report = [
+            self.divider_line(),
+            f"BLOCK reference attributes:",
+            self.divider_line(),
+        ]
+        for index, attr in enumerate(self.multileader.block_attribs):
+            report.extend(
+                [
+                    f"{index+1}. Attributes",
+                    self.divider_line(),
+                ]
+            )
+            report.append(f"handle: {attr.handle}")
+            report.append(f"index: {attr.index}")
+            report.append(f"width: {attr.width}")
+            report.append(f"text: {attr.text}")
+        return report
+
+    def arrow_heads(self) -> list[str]:
+        report = [
+            self.divider_line(),
+            f"ARROW HEAD attributes:",
+            self.divider_line(),
+        ]
+        for index, attr in enumerate(self.multileader.arrow_heads):
+            report.extend(
+                [
+                    f"{index+1}. Arrow Head",
+                    self.divider_line(),
+                ]
+            )
+            report.append(f"handle: {attr.handle}")
+            report.append(f"index: {attr.index}")
+        return report
+
+    def print_mleaderstyle(self):
+        print("\n".join(self.mleaderstyle_attributes()))
+
+    def mleaderstyle_attributes(self) -> list[str]:
+        report = []
+        style = self.mleaderstyle
+        if style is not None:
+            report.extend(
+                [
+                    self.divider_line("="),
+                    str(style),
+                    self.divider_line("="),
+                ]
+            )
+            attribs = style.dxf.all_existing_dxf_attribs()
+            keys = sorted(attribs.keys())
+            report.extend([f"{name}: {attribs[name]}" for name in keys])
+        else:
+            handle = self.multileader.dxf.get("style_handle")
+            report.append(f"MLEADERSTYLE(#{handle}) not found")
+        return self.shorten_lines(report)
+
+
+def _content_attributes(
+    entity, exclude: Optional[Sequence[str]] = None
+) -> list[str]:
+    exclude = exclude or []
+    if entity is not None:
+        return [
+            f"{name}: {value}"
+            for name, value in entity.__dict__.items()
+            if name not in exclude
+        ]
+    return []
+
+
+def yes_or_no(data) -> str:
+    return "yes" if data else "no"

server/venv/lib/python3.9/site-packages/ezdxf/tools/binarydata.py

@@ -0,0 +1,606 @@
+# Copyright (c) 2014-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Iterable, Any, Sequence, Union, overload, Optional
+from array import array
+import struct
+from binascii import unhexlify, hexlify
+from codecs import decode
+
+Bytes = Union[bytes, bytearray, memoryview]
+
+
+def hex_strings_to_bytes(data: Iterable[str]) -> bytes:
+    """Returns multiple hex strings `data` as bytes."""
+    byte_array = array("B")
+    for hexstr in data:
+        byte_array.extend(unhexlify(hexstr))
+    return byte_array.tobytes()
+
+
+def bytes_to_hexstr(data: bytes) -> str:
+    """Returns `data` bytes as plain hex string."""
+    return hexlify(data).upper().decode()
+
+
+NULL_NULL = b"\x00\x00"
+
+
+class EndOfBufferError(EOFError):
+    pass
+
+
+class ByteStream:
+    """Process little endian binary data organized as bytes, data is padded to
+    4 byte boundaries by default.
+    """
+
+    # Created for Proxy Entity Graphic decoding
+    def __init__(self, buffer: Bytes, align: int = 4):
+        self.buffer = memoryview(buffer)
+        self.index: int = 0
+        self._align: int = align
+
+    @property
+    def has_data(self) -> bool:
+        return self.index < len(self.buffer)
+
+    def align(self, index: int) -> int:
+        modulo = index % self._align
+        return index + self._align - modulo if modulo else index
+
+    def read_struct(self, fmt: str) -> Any:
+        """Read data defined by a struct format string. Insert little endian
+        format character '<' as first character, if machine has native big
+        endian byte order.
+        """
+        if not self.has_data:
+            raise EndOfBufferError("Unexpected end of buffer.")
+
+        result = struct.unpack_from(fmt, self.buffer, offset=self.index)
+        self.index = self.align(self.index + struct.calcsize(fmt))
+        return result
+
+    def read_float(self) -> float:
+        return self.read_struct("<d")[0]
+
+    def read_long(self) -> int:
+        return self.read_struct("<L")[0]
+
+    def read_signed_long(self) -> int:
+        return self.read_struct("<l")[0]
+
+    def read_vertex(self) -> Sequence[float]:
+        return self.read_struct("<3d")
+
+    def read_padded_string(self, encoding: str = "utf_8") -> str:
+        """PS: Padded String. This is a string, terminated with a zero byte.
+        The file’s text encoding (code page) is used to encode/decode the bytes
+        into a string.
+        """
+        buffer = self.buffer
+        for end_index in range(self.index, len(buffer)):
+            if buffer[end_index] == 0:
+                start_index = self.index
+                self.index = self.align(end_index + 1)
+                # noinspection PyTypeChecker
+                return decode(buffer[start_index:end_index], encoding=encoding)
+        raise EndOfBufferError(
+            "Unexpected end of buffer, did not detect terminating zero byte."
+        )
+
+    def read_padded_unicode_string(self) -> str:
+        """PUS: Padded Unicode String. The bytes are encoded using Unicode
+        encoding. The bytes consist of byte pairs and the string is terminated
+        by 2 zero bytes.
+        """
+        buffer = self.buffer
+        for end_index in range(self.index, len(buffer), 2):
+            if buffer[end_index : end_index + 2] == NULL_NULL:
+                start_index = self.index
+                self.index = self.align(end_index + 2)
+                # noinspection PyTypeChecker
+                return decode(
+                    buffer[start_index:end_index], encoding="utf_16_le"
+                )
+        raise EndOfBufferError(
+            "Unexpected end of buffer, did not detect terminating zero bytes."
+        )
+
+
+class BitStream:
+    """Process little endian binary data organized as bit stream."""
+
+    # Created for Proxy Entity Graphic decoding and DWG bit stream decoding
+    def __init__(
+        self,
+        buffer: Bytes,
+        dxfversion: str = "AC1015",
+        encoding: str = "cp1252",
+    ):
+        self.buffer = memoryview(buffer)
+        self.bit_index: int = 0
+        self.dxfversion = dxfversion
+        self.encoding = encoding
+
+    @property
+    def has_data(self) -> bool:
+        return self.bit_index >> 3 < len(self.buffer)
+
+    def align(self, count: int) -> None:
+        """Align to byte border."""
+        byte_index = (self.bit_index >> 3) + bool(self.bit_index & 7)
+        modulo = byte_index % count
+        if modulo:
+            byte_index += count - modulo
+        self.bit_index = byte_index << 3
+
+    def skip(self, count: int) -> None:
+        """Skip `count` bits."""
+        self.bit_index += count
+
+    def read_bit(self) -> int:
+        """Read one bit from buffer."""
+        index = self.bit_index
+        self.bit_index += 1
+        try:
+            return 1 if self.buffer[index >> 3] & (0x80 >> (index & 7)) else 0
+        except IndexError:
+            raise EndOfBufferError("Unexpected end of buffer.")
+
+    def read_bits(self, count) -> int:
+        """Read `count` bits from buffer."""
+        index = self.bit_index
+        buffer = self.buffer
+        # index of next bit after reading `count` bits
+        next_bit_index = index + count
+
+        if (next_bit_index - 1) >> 3 > len(buffer):
+            # not enough data to read all bits
+            raise EndOfBufferError("Unexpected end of buffer.")
+        self.bit_index = next_bit_index
+
+        test_bit = 0x80 >> (index & 7)
+        test_byte_index = index >> 3
+        value = 0
+        test_byte = buffer[test_byte_index]
+        while count > 0:
+            value <<= 1
+            if test_byte & test_bit:
+                value |= 1
+            count -= 1
+            test_bit >>= 1
+            if not test_bit and count:
+                test_bit = 0x80
+                test_byte_index += 1
+                test_byte = buffer[test_byte_index]
+        return value
+
+    def read_unsigned_byte(self) -> int:
+        """Read an unsigned byte (8 bit) from buffer."""
+        return self.read_bits(8)
+
+    def read_signed_byte(self) -> int:
+        """Read a signed byte (8 bit) from buffer."""
+        value = self.read_bits(8)
+        if value & 0x80:
+            # 2er complement
+            return -((~value & 0xFF) + 1)
+        else:
+            return value
+
+    def read_aligned_bytes(self, count: int) -> Sequence[int]:
+        buffer = self.buffer
+        start_index = self.bit_index >> 3
+        end_index = start_index + count
+        if end_index <= len(buffer):
+            self.bit_index += count << 3
+            return buffer[start_index:end_index]
+        else:
+            raise EndOfBufferError("Unexpected end of buffer.")
+
+    def read_unsigned_short(self) -> int:
+        """Read an unsigned short (16 bit) from buffer."""
+        if self.bit_index & 7:
+            s1 = self.read_bits(8)
+            s2 = self.read_bits(8)
+        else:  # aligned data
+            s1, s2 = self.read_aligned_bytes(2)
+        return (s2 << 8) + s1
+
+    def read_signed_short(self) -> int:
+        """Read a signed short (16 bit) from buffer."""
+        value = self.read_unsigned_short()
+        if value & 0x8000:
+            # 2er complement
+            return -((~value & 0xFFFF) + 1)
+        else:
+            return value
+
+    def read_unsigned_long(self) -> int:
+        """Read an unsigned long (32 bit) from buffer."""
+        if self.bit_index & 7:
+            read_bits = self.read_bits
+            l1 = read_bits(8)
+            l2 = read_bits(8)
+            l3 = read_bits(8)
+            l4 = read_bits(8)
+        else:  # aligned data
+            l1, l2, l3, l4 = self.read_aligned_bytes(4)
+        return (l4 << 24) + (l3 << 16) + (l2 << 8) + l1
+
+    def read_signed_long(self) -> int:
+        """Read a signed long (32 bit) from buffer."""
+        value = self.read_unsigned_long()
+        if value & 0x80000000:
+            # 2er complement
+            return -((~value & 0xFFFFFFFF) + 1)
+        else:
+            return value
+
+    def read_float(self) -> float:
+        if self.bit_index & 7:
+            read_bits = self.read_bits
+            data = bytes(read_bits(8) for _ in range(8))
+        else:  # aligned data
+            data = bytes(self.read_aligned_bytes(8))
+        return struct.unpack("<d", data)[0]
+
+    def read_3_bits(self) -> int:
+        bit = self.read_bit()
+        if bit:  # 1
+            bit = self.read_bit()
+            if bit:  # 11
+                bit = self.read_bit()
+                if bit:
+                    return 7  # 111
+                else:
+                    return 6  # 110
+            return 2  # 10
+        else:
+            return 0  # 0
+
+    @overload
+    def read_bit_short(self) -> int:
+        ...
+
+    @overload
+    def read_bit_short(self, count: int) -> Sequence[int]:
+        ...
+
+    def read_bit_short(self, count: int = 1) -> Union[int, Sequence[int]]:
+        def _read():
+            bits = self.read_bits(2)
+            if bits == 0:
+                return self.read_signed_short()
+            elif bits == 1:
+                return self.read_unsigned_byte()
+            elif bits == 2:
+                return 0
+            else:
+                return 256
+
+        if count == 1:
+            return _read()
+        else:
+            return tuple(_read() for _ in range(count))
+
+    @overload
+    def read_bit_long(self) -> int:
+        ...
+
+    @overload
+    def read_bit_long(self, count: int) -> Sequence[int]:
+        ...
+
+    def read_bit_long(self, count: int = 1) -> Union[int, Sequence[int]]:
+        def _read():
+            bits = self.read_bits(2)
+            if bits == 0:
+                return self.read_signed_long()
+            elif bits == 1:
+                return self.read_unsigned_byte()
+            elif bits == 2:
+                return 0
+            else:  # not used!
+                return 256  # ???
+
+        if count == 1:
+            return _read()
+        else:
+            return tuple(_read() for _ in range(count))
+
+    # LibreDWG: https://github.com/LibreDWG/libredwg/blob/master/src/bits.c
+    # Read 1 bitlonglong (compacted uint64_t) for REQUIREDVERSIONS, preview_size.
+    # ODA doc bug. ODA say 1-3 bits until the first 0 bit. See 3BLL.
+    # The first 3 bits indicate the length l (see paragraph 2.1). Then
+    # l bytes follow, which represent the number (the least significant
+    # byte is first).
+    def read_bit_long_long(self) -> int:
+        value = 0
+        shifting = 0
+        length = self.read_bits(3)  # or read_3_bits() ?
+        while length > 0:
+            value += self.read_unsigned_byte() << shifting
+            length -= 1
+            shifting += 8
+        return value
+
+    @overload
+    def read_raw_double(self) -> float:
+        ...
+
+    @overload
+    def read_raw_double(self, count: int) -> Sequence[float]:
+        ...
+
+    def read_raw_double(self, count: int = 1) -> Union[float, Sequence[float]]:
+        if count == 1:
+            return self.read_float()
+        else:
+            return tuple(self.read_float() for _ in range(count))
+
+    @overload
+    def read_bit_double(self) -> float:
+        ...
+
+    @overload
+    def read_bit_double(self, count: int) -> Sequence[float]:
+        ...
+
+    def read_bit_double(self, count: int = 1) -> Union[float, Sequence[float]]:
+        def _read():
+            bits = self.read_bits(2)
+            if bits == 0:
+                return self.read_float()
+            elif bits == 1:
+                return 1.0
+            elif bits == 2:
+                return 0.0
+            else:  # not used!
+                return 0.0
+
+        if count == 1:
+            return _read()
+        else:
+            return tuple(_read() for _ in range(count))
+
+    @overload
+    def read_bit_double_default(self) -> float:
+        ...
+
+    @overload
+    def read_bit_double_default(self, count: int) -> Sequence[float]:
+        ...
+
+    @overload
+    def read_bit_double_default(
+        self, count: int, default: float
+    ) -> Sequence[float]:
+        ...
+
+    def read_bit_double_default(
+        self, count: int = 1, default: float = 0.0
+    ) -> Union[float, Sequence[float]]:
+        data = struct.pack("<d", default)
+
+        def _read():
+            bits = self.read_bits(2)
+            if bits == 0:
+                return default
+            elif bits == 1:
+                _data = (
+                    bytes(self.read_unsigned_byte() for _ in range(4))
+                    + data[4:]
+                )
+                return struct.unpack("<d", _data)[0]
+            elif bits == 2:
+                _data = bytearray(data)
+                _data[4] = self.read_unsigned_byte()
+                _data[5] = self.read_unsigned_byte()
+                _data[0] = self.read_unsigned_byte()
+                _data[1] = self.read_unsigned_byte()
+                _data[2] = self.read_unsigned_byte()
+                _data[3] = self.read_unsigned_byte()
+                return struct.unpack("<d", _data)[0]
+            else:
+                return self.read_float()
+
+        if count == 1:
+            return _read()
+        else:
+            return tuple(_read() for _ in range(count))
+
+    def read_signed_modular_chars(self) -> int:
+        """Modular characters are a method of storing compressed integer
+        values. They consist of a stream of bytes, terminating when the high
+        bit (8) of the byte is 0 else another byte follows. Negative numbers
+        are indicated by bit 7 set in the last byte.
+
+        """
+        shifting = 0
+        value = 0
+        while True:
+            char = self.read_unsigned_byte()
+            if char & 0x80:
+                # bit 8 set = another char follows
+                value |= (char & 0x7F) << shifting
+                shifting += 7
+            else:
+                # bit 8 clear = end of modular char
+                # bit 7 set = negative number
+                value |= (char & 0x3F) << shifting
+                return -value if char & 0x40 else value
+
+    def read_unsigned_modular_chars(self) -> int:
+        """Modular characters are a method of storing compressed integer
+        values. They consist of a stream of bytes, terminating when the high
+        bit (8) of the byte is 0 else another byte follows.
+
+        """
+        shifting = 0
+        value = 0
+        while True:
+            char = self.read_unsigned_byte()
+            value |= (char & 0x7F) << shifting
+            shifting += 7
+            # bit 8 set = another char follows
+            if not (char & 0x80):
+                return value
+
+    def read_modular_shorts(self) -> int:
+        """Modular shorts are a method of storing compressed unsigned integer
+        values. Only 1 or 2 shorts in practical usage (1GB), if the high
+        bit (16) of the first short is set another short follows.
+
+        """
+        short = self.read_unsigned_short()
+        if short & 0x8000:
+            return (self.read_unsigned_short() << 15) | (short & 0x7FFF)
+        else:
+            return short
+
+    def read_bit_extrusion(self) -> Sequence[float]:
+        if self.read_bit():
+            return 0.0, 0.0, 1.0
+        else:
+            return self.read_bit_double(3)
+
+    def read_bit_thickness(self, dxfversion="AC1015") -> float:
+        if dxfversion >= "AC1015":
+            if self.read_bit():
+                return 0.0
+        return self.read_bit_double()
+
+    def read_cm_color(self) -> int:
+        return self.read_bit_short()
+
+    def read_text(self) -> str:
+        length = self.read_bit_short()
+        data = bytes(self.read_unsigned_byte() for _ in range(length))
+        return data.decode(encoding=self.encoding)
+
+    def read_text_unicode(self) -> str:
+        # Unicode text is read from the "string stream" within the object data,
+        # see the main Object description section for details.
+        length = self.read_bit_short()
+        data = bytes(self.read_unsigned_byte() for _ in range(length * 2))
+        return data.decode(encoding="utf16")
+
+    def read_text_variable(self) -> str:
+        if self.dxfversion < "AC1018":  # R2004
+            return self.read_text()
+        else:
+            return self.read_text_unicode()
+
+    def read_cm_color_cms(self) -> tuple[int, str, str]:
+        """Returns tuple (rgb, color_name, book_name)."""
+        _ = self.read_bit_short()  # index always 0
+        color_name = ""
+        book_name = ""
+        rgb = self.read_bit_long()
+        rc = self.read_unsigned_byte()
+        if rc & 1:
+            color_name = self.read_text_variable()
+        if rc & 2:
+            book_name = self.read_text_variable()
+        return rgb, color_name, book_name
+
+    def read_cm_color_enc(self) -> Union[int, Sequence[Optional[int]]]:
+        """Returns color index as int or tuple (rgb, color_handle,
+        transparency_type, transparency).
+        """
+        flags_and_index = self.read_bit_short()
+        flags = flags_and_index >> 8
+        index = flags_and_index & 0xFF
+        if flags:
+            rgb = None
+            color_handle = None
+            transparency_type = None
+            transparency = None
+            if flags & 0x80:
+                rgb = self.read_bit_short() & 0x00FFFFFF
+            if flags & 0x40:
+                color_handle = self.read_handle()
+            if flags & 0x20:
+                data = self.read_bit_long()
+                transparency_type = data >> 24
+                transparency = data & 0xFF
+            return rgb, color_handle, transparency_type, transparency
+        else:
+            return index
+
+    def read_object_type(self) -> int:
+        bits = self.read_bits(2)
+        if bits == 0:
+            return self.read_unsigned_byte()
+        elif bits == 1:
+            return self.read_unsigned_byte() + 0x1F0
+        else:
+            return self.read_unsigned_short()
+
+    def read_handle(self, reference: int = 0) -> int:
+        """Returns handle as integer value."""
+        code = self.read_bits(4)
+        length = self.read_bits(4)
+        if code == 6:
+            return reference + 1
+        if code == 8:
+            return reference - 1
+
+        data = bytearray(b"\x00\x00\x00\x00\x00\x00\x00\x00")
+        for index in range(length):
+            data[index] = self.read_unsigned_byte()
+        offset = struct.unpack("<Q", data)[0]
+
+        if code < 6:
+            return offset
+        else:
+            if code == 10:
+                return reference + offset
+            if code == 12:
+                return reference - offset
+        return 0
+
+    def read_hex_handle(self, reference: int = 0) -> str:
+        """Returns handle as hex string."""
+        return "%X" % self.read_handle(reference)
+
+    def read_code(self, code: str):
+        """Read data from bit stream by data codes defined in the
+        ODA reference.
+
+        """
+        if code == "B":
+            return self.read_bit()
+        elif code == "RC":
+            return self.read_unsigned_byte()
+        elif code == "RS":
+            return self.read_signed_short()
+        elif code == "BS":
+            return self.read_bit_short()
+        elif code == "RL":
+            return self.read_signed_long()
+        elif code == "BL":
+            return self.read_bit_long()
+        elif code == "RD":
+            return self.read_raw_double()
+        elif code == "2RD":
+            return self.read_raw_double(2)
+        elif code == "BD":
+            return self.read_bit_double()
+        elif code == "2BD":
+            return self.read_bit_double(2)
+        elif code == "3BD":
+            return self.read_bit_double(3)
+        elif code == "T":
+            return self.read_text()
+        elif code == "TV":
+            return self.read_text_variable()
+        elif code == "H":
+            return self.read_hex_handle()
+        elif code == "BLL":
+            return self.read_bit_long_long()
+        elif code == "CMC":
+            return self.read_cm_color()
+        raise ValueError(f"Unknown code: {code}")

server/venv/lib/python3.9/site-packages/ezdxf/tools/clipping_portal.py

@@ -0,0 +1,470 @@
+#  Copyright (c) 2024, Manfred Moitzi
+#  License: MIT License
+from __future__ import annotations
+from typing import (
+    Optional,
+    Iterable,
+    Iterator,
+    Sequence,
+    NamedTuple,
+    Callable,
+    TYPE_CHECKING,
+)
+import abc
+
+from ezdxf.math import (
+    Matrix44,
+    Vec2,
+    BoundingBox2d,
+    UVec,
+    is_convex_polygon_2d,
+    is_axes_aligned_rectangle_2d,
+)
+from ezdxf.npshapes import NumpyPath2d, NumpyPoints2d
+
+if TYPE_CHECKING:
+    from ezdxf.math.clipping import Clipping
+
+__all__ = [
+    "ClippingShape",
+    "ClippingPortal",
+    "ClippingRect",
+    "ConvexClippingPolygon",
+    "InvertedClippingPolygon",
+    "MultiClip",
+    "find_best_clipping_shape",
+    "make_inverted_clipping_shape",
+]
+
+
+class ClippingShape(abc.ABC):
+    """The ClippingShape defines a single clipping path and executes the clipping on
+    basic geometries:
+
+    - point: a single point
+    - line: a line between two vertices
+    - polyline: open polyline with one or more straight line segments
+    - polygon: closed shape with straight line as edges
+    - path: open shape with straight lines and Bezier-curves as segments
+    - filled-path: closed shape with straight lines and Bezier-curves as edges
+
+    Difference between open and closed shapes:
+
+        - an open shape is treated as a linear shape without a filling
+        - clipping an open shape returns one or more open shapes
+        - a closed shape is treated as a filled shape, where the first vertex is
+          coincident to the last vertex.
+        - clipping a closed shape returns one or more closed shapes
+
+    Notes:
+
+        An arbitrary clipping polygon can split any basic geometry (except point) into
+        multiple parts.
+
+        All current implemented clipping algorithms flatten Bezier-curves into polylines.
+
+    """
+
+    @abc.abstractmethod
+    def bbox(self) -> BoundingBox2d: ...
+
+    @abc.abstractmethod
+    def is_completely_inside(self, other: BoundingBox2d) -> bool: ...
+
+    # returning False means: I don't know!
+
+    @abc.abstractmethod
+    def is_completely_outside(self, other: BoundingBox2d) -> bool: ...
+
+    @abc.abstractmethod
+    def clip_point(self, point: Vec2) -> Optional[Vec2]: ...
+
+    @abc.abstractmethod
+    def clip_line(self, start: Vec2, end: Vec2) -> Sequence[tuple[Vec2, Vec2]]: ...
+
+    @abc.abstractmethod
+    def clip_polyline(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]: ...
+
+    @abc.abstractmethod
+    def clip_polygon(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]: ...
+
+    @abc.abstractmethod
+    def clip_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]: ...
+
+    @abc.abstractmethod
+    def clip_filled_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]: ...
+
+
+class ClippingStage(NamedTuple):
+    portal: ClippingShape
+    transform: Matrix44 | None
+
+
+class ClippingPortal:
+    """The ClippingPortal manages a clipping path stack."""
+
+    def __init__(self) -> None:
+        self._stages: list[ClippingStage] = []
+
+    @property
+    def is_active(self) -> bool:
+        return bool(self._stages)
+
+    def push(self, portal: ClippingShape, transform: Matrix44 | None) -> None:
+        self._stages.append(ClippingStage(portal, transform))
+
+    def pop(self) -> None:
+        if self._stages:
+            self._stages.pop()
+
+    def foreach_stage(self, command: Callable[[ClippingStage], bool]) -> None:
+        for stage in self._stages[::-1]:
+            if not command(stage):
+                return
+
+    def clip_point(self, point: Vec2) -> Optional[Vec2]:
+        result: Vec2 | None = point
+
+        def do(stage: ClippingStage) -> bool:
+            nonlocal result
+            assert result is not None
+            if stage.transform:
+                result = Vec2(stage.transform.transform(result))
+            result = stage.portal.clip_point(result)
+            return result is not None
+
+        self.foreach_stage(do)
+        return result
+
+    def clip_line(self, start: Vec2, end: Vec2) -> list[tuple[Vec2, Vec2]]:
+        def do(stage: ClippingStage) -> bool:
+            lines = list(result)
+            result.clear()
+            for s, e in lines:
+                if stage.transform:
+                    s, e = stage.transform.fast_2d_transform((s, e))
+                result.extend(stage.portal.clip_line(s, e))
+            return bool(result)
+
+        result = [(start, end)]
+        self.foreach_stage(do)
+        return result
+
+    def clip_polyline(self, points: NumpyPoints2d) -> list[NumpyPoints2d]:
+        def do(stage: ClippingStage) -> bool:
+            polylines = list(result)
+            result.clear()
+            for polyline in polylines:
+                if stage.transform:
+                    polyline.transform_inplace(stage.transform)
+                result.extend(stage.portal.clip_polyline(polyline))
+            return bool(result)
+
+        result = [points]
+        self.foreach_stage(do)
+        return result
+
+    def clip_polygon(self, points: NumpyPoints2d) -> list[NumpyPoints2d]:
+        def do(stage: ClippingStage) -> bool:
+            polygons = list(result)
+            result.clear()
+            for polygon in polygons:
+                if stage.transform:
+                    polygon.transform_inplace(stage.transform)
+                result.extend(stage.portal.clip_polygon(polygon))
+            return bool(result)
+
+        result = [points]
+        self.foreach_stage(do)
+        return result
+
+    def clip_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> list[NumpyPath2d]:
+        def do(stage: ClippingStage) -> bool:
+            paths = list(result)
+            result.clear()
+            for path in paths:
+                if stage.transform:
+                    path.transform_inplace(stage.transform)
+            result.extend(stage.portal.clip_paths(paths, max_sagitta))
+            return bool(result)
+
+        result = list(paths)
+        self.foreach_stage(do)
+        return result
+
+    def clip_filled_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> list[NumpyPath2d]:
+        def do(stage: ClippingStage) -> bool:
+            paths = list(result)
+            result.clear()
+            for path in paths:
+                if stage.transform:
+                    path.transform_inplace(stage.transform)
+            result.extend(stage.portal.clip_filled_paths(paths, max_sagitta))
+            return bool(result)
+
+        result = list(paths)
+        self.foreach_stage(do)
+        return result
+
+    def transform_matrix(self, m: Matrix44) -> Matrix44:
+        for _, transform in self._stages[::-1]:
+            if transform is not None:
+                m @= transform
+        return m
+
+
+class ClippingPolygon(ClippingShape):
+    """Represents an arbitrary polygon as clipping shape.  Removes the geometry
+    outside the clipping polygon.
+
+    """
+
+    def __init__(self, bbox: BoundingBox2d, clipper: Clipping) -> None:
+        if not bbox.has_data:
+            raise ValueError("clipping box not detectable")
+        self._bbox = bbox
+        self.clipper = clipper
+
+    def bbox(self) -> BoundingBox2d:
+        return self._bbox
+
+    def clip_point(self, point: Vec2) -> Optional[Vec2]:
+        is_inside = self.clipper.is_inside(Vec2(point))
+        if not is_inside:
+            return None
+        return point
+
+    def clip_line(self, start: Vec2, end: Vec2) -> Sequence[tuple[Vec2, Vec2]]:
+        return self.clipper.clip_line(start, end)
+
+    def clip_polyline(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]:
+        clipper = self.clipper
+        if len(points) == 0:
+            return tuple()
+        polyline_bbox = BoundingBox2d(points.extents())
+        if self.is_completely_outside(polyline_bbox):
+            return tuple()
+        if self.is_completely_inside(polyline_bbox):
+            return (points,)
+        return [
+            NumpyPoints2d(part)
+            for part in clipper.clip_polyline(points.vertices())
+            if len(part) > 0
+        ]
+
+    def clip_polygon(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]:
+        clipper = self.clipper
+        if len(points) < 2:
+            return tuple()
+        polygon_bbox = BoundingBox2d(points.extents())
+        if self.is_completely_outside(polygon_bbox):
+            return tuple()
+        if self.is_completely_inside(polygon_bbox):
+            return (points,)
+        return [
+            NumpyPoints2d(part)
+            for part in clipper.clip_polygon(points.vertices())
+            if len(part) > 0
+        ]
+
+    def clip_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]:
+        clipper = self.clipper
+        for path in paths:
+            for sub_path in path.sub_paths():
+                path_bbox = BoundingBox2d(sub_path.control_vertices())
+                if not path_bbox.has_data:
+                    continue
+                if self.is_completely_inside(path_bbox):
+                    yield sub_path
+                    continue
+                if self.is_completely_outside(path_bbox):
+                    continue
+                polyline = Vec2.list(sub_path.flattening(max_sagitta, segments=4))
+                for part in clipper.clip_polyline(polyline):
+                    if len(part) > 0:
+                        yield NumpyPath2d.from_vertices(part, close=False)
+
+    def clip_filled_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]:
+        clipper = self.clipper
+        for path in paths:
+            for sub_path in path.sub_paths():
+                if len(sub_path) < 2:
+                    continue
+                path_bbox = BoundingBox2d(sub_path.control_vertices())
+                if self.is_completely_inside(path_bbox):
+                    yield sub_path
+                    continue
+                if self.is_completely_outside(path_bbox):
+                    continue
+                for part in clipper.clip_polygon(
+                    Vec2.list(sub_path.flattening(max_sagitta, segments=4))
+                ):
+                    if len(part) > 0:
+                        yield NumpyPath2d.from_vertices(part, close=True)
+
+
+class ClippingRect(ClippingPolygon):
+    """Represents a rectangle as clipping shape where the edges are parallel to
+    the x- and  y-axis of the coordinate system.  Removes the geometry outside the
+    clipping rectangle.
+
+    """
+
+    def __init__(self, vertices: Iterable[UVec]) -> None:
+        from ezdxf.math.clipping import ClippingRect2d
+
+        polygon = Vec2.list(vertices)
+        bbox = BoundingBox2d(polygon)
+        if not bbox.has_data:
+            raise ValueError("clipping box not detectable")
+        size: Vec2 = bbox.size
+        self.remove_all = size.x * size.y < 1e-9
+
+        super().__init__(bbox, ClippingRect2d(bbox.extmin, bbox.extmax))
+
+    def is_completely_inside(self, other: BoundingBox2d) -> bool:
+        return self._bbox.contains(other)
+
+    def is_completely_outside(self, other: BoundingBox2d) -> bool:
+        return not self._bbox.has_intersection(other)
+
+    def clip_point(self, point: Vec2) -> Optional[Vec2]:
+        if self.remove_all:
+            return None
+        return super().clip_point(point)
+
+    def clip_line(self, start: Vec2, end: Vec2) -> Sequence[tuple[Vec2, Vec2]]:
+        if self.remove_all:
+            return tuple()
+        return self.clipper.clip_line(start, end)
+
+    def clip_polyline(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]:
+        if self.remove_all:
+            return (NumpyPoints2d(tuple()),)
+        return super().clip_polyline(points)
+
+    def clip_polygon(self, points: NumpyPoints2d) -> Sequence[NumpyPoints2d]:
+        if self.remove_all:
+            return (NumpyPoints2d(tuple()),)
+        return super().clip_polygon(points)
+
+    def clip_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]:
+        if self.remove_all:
+            return iter(tuple())
+        return super().clip_paths(paths, max_sagitta)
+
+    def clip_filled_paths(
+        self, paths: Iterable[NumpyPath2d], max_sagitta: float
+    ) -> Iterator[NumpyPath2d]:
+        if self.remove_all:
+            return iter(tuple())
+        return super().clip_filled_paths(paths, max_sagitta)
+
+
+class ConvexClippingPolygon(ClippingPolygon):
+    """Represents an arbitrary convex polygon as clipping shape.  Removes the geometry
+    outside the clipping polygon.
+
+    """
+
+    def __init__(self, vertices: Iterable[UVec]) -> None:
+        from ezdxf.math.clipping import ConvexClippingPolygon2d
+
+        polygon = Vec2.list(vertices)
+        super().__init__(BoundingBox2d(polygon), ConvexClippingPolygon2d(polygon))
+
+    def is_completely_inside(self, other: BoundingBox2d) -> bool:
+        return False  # I don't know!
+
+    def is_completely_outside(self, other: BoundingBox2d) -> bool:
+        return not self._bbox.has_intersection(other)
+
+
+class ConcaveClippingPolygon(ClippingPolygon):
+    """Represents an arbitrary concave polygon as clipping shape.  Removes the geometry
+    outside the clipping polygon.
+
+    """
+
+    def __init__(self, vertices: Iterable[UVec]) -> None:
+        from ezdxf.math.clipping import ConcaveClippingPolygon2d
+
+        polygon = Vec2.list(vertices)
+        super().__init__(BoundingBox2d(polygon), ConcaveClippingPolygon2d(polygon))
+
+    def is_completely_inside(self, other: BoundingBox2d) -> bool:
+        return False  # I don't know!
+
+    def is_completely_outside(self, other: BoundingBox2d) -> bool:
+        return not self._bbox.has_intersection(other)
+
+
+class InvertedClippingPolygon(ClippingPolygon):
+    """Represents an arbitrary inverted clipping polygon.  Removes the geometry
+    inside the clipping polygon.
+
+    .. Important:: 
+    
+        The `outer_bounds` must be larger than the content to clip to work correctly.
+
+    """
+
+    def __init__(self, vertices: Iterable[UVec], outer_bounds: BoundingBox2d) -> None:
+        from ezdxf.math.clipping import InvertedClippingPolygon2d
+
+        polygon = Vec2.list(vertices)
+        super().__init__(outer_bounds, InvertedClippingPolygon2d(polygon, outer_bounds))
+
+    def is_completely_inside(self, other: BoundingBox2d) -> bool:
+        # returning False means: I don't know!
+        return False  # not easy to detect
+
+    def is_completely_outside(self, other: BoundingBox2d) -> bool:
+        return not self._bbox.has_intersection(other)
+
+
+def find_best_clipping_shape(polygon: Iterable[UVec]) -> ClippingShape:
+    """Returns the best clipping shape for the given clipping polygon.
+
+    The function analyses the given polygon (rectangular, convex or concave polygon, ...)
+    and returns the optimized (fastest) clipping shape.
+
+    Args:
+        polygon: clipping polygon as iterable vertices
+
+    """
+    points = Vec2.list(polygon)
+    if is_axes_aligned_rectangle_2d(points):
+        return ClippingRect(points)
+    elif is_convex_polygon_2d(points, strict=False):
+        return ConvexClippingPolygon(points)
+    return ConcaveClippingPolygon(points)
+
+
+def make_inverted_clipping_shape(
+    polygon: Iterable[UVec], outer_bounds: BoundingBox2d
+) -> ClippingShape:
+    """Returns an inverted clipping shape that removes the geometry inside the clipping
+    polygon and beyond the outer bounds.
+
+    Args:
+        polygon: clipping polygon as iterable vertices
+        outer_bounds: outer bounds of the clipping shape
+
+    """
+
+    return InvertedClippingPolygon(polygon, outer_bounds)

server/venv/lib/python3.9/site-packages/ezdxf/tools/codepage.py

@@ -0,0 +1,91 @@
+# Purpose: constant values
+# Created: 10.03.2011
+# Copyright (c) 2011-2018, Manfred Moitzi
+# License: MIT License
+
+# --- For Unix ---
+#  0:    undefined    Rises an error.
+#  1:    ascii        $20-$7F,%%c,%%d,%%p Only
+#  2:    iso8859_1    Western Europe(Unix)    $20-$FF,%%c,%%d,%%p
+#  3:    iso8859_2    Central Europe(Unix)
+#  4:    iso8859_3    Eastern Europe(Unix)
+#  5:    iso8859_4    Baltic(Unix)
+#  6:    iso8859_5    Cyrillic(Unix)
+#  7:    iso8859_6    Arabic(Unix)
+#  8:    iso8859_7    Greek(Unix)
+#  9:    iso8859_8    Hebrew(Unix)
+# 10:    iso8859_9    Turkish(Unix)
+#
+# --- For DOS/Mac ---
+# 11:    dos437    DOS USA
+# 12:    dos850    DOS Western Europe
+# 13:    dos852    DOS Eastern Europe
+# 14:    dos855    IBM Russian
+# 15:    dos857    IBM Turkish
+# 16:    dos860    DOS Portuguese
+# 17:    dos861    DOS Icelandic
+# 18:    dos863    DOS Canadian French
+# 19:    dos864    DOS Arabic
+# 20:    dos865    DOS Norwegian
+# 21:    dos869    DOS Greek
+# 22:    dos932    DOS Japanese
+# 23:    mac-roman    Mac
+# 24:    big5    DOS Traditional Chinese
+# 25:    ksc5601    Korean Wansung
+# 26:    johab    Korean Johab
+# 27:    dos866    DOS Russian
+# 31:    gb2312    DOS Simplified Chinese
+#
+# --- For Windows ---
+# 28:    ansi_1250    Win Eastern Europe
+# 29:    ansi_1251    Win Russian
+# 30:    ansi_1252    Win Western Europe(ANSI)
+# 32:    ansi_1253    Win Greek
+# 33:    ansi_1254    Win Turkish
+# 34:    ansi_1255    Win Hebrew
+# 35:    ansi_1256    Win Arabic
+# 36:    ansi_1257    Win Baltic
+# 37:    ansi_874    Win Thai
+# 38:    ansi_932    Win Japanese
+# 39:    ansi_936    Win Simplified Chinese GB
+# 40:    ansi_949    Win Korean Wansung
+# 41:    ansi_950    Win Traditional Chinese big5
+# 42:    ansi_1361    Win Korean Johab
+# 43:    ansi_1200    Unicode (reserved)
+# --:    ansi_1258    Win Vietnamese (reserved)
+
+codepage_to_encoding = {
+    "874": "cp874",  # Thai,
+    "932": "cp932",  # Japanese
+    "936": "gbk",  # UnifiedChinese
+    "949": "cp949",  # Korean
+    "950": "cp950",  # TradChinese
+    "1250": "cp1250",  # CentralEurope
+    "1251": "cp1251",  # Cyrillic
+    "1252": "cp1252",  # WesternEurope
+    "1253": "cp1253",  # Greek
+    "1254": "cp1254",  # Turkish
+    "1255": "cp1255",  # Hebrew
+    "1256": "cp1256",  # Arabic
+    "1257": "cp1257",  # Baltic
+    "1258": "cp1258",  # Vietnam
+}
+
+encoding_to_codepage = {
+    codec: ansi for ansi, codec in codepage_to_encoding.items()
+}
+
+
+def is_supported_encoding(encoding: str = "cp1252") -> bool:
+    return encoding in encoding_to_codepage
+
+
+def toencoding(dxfcodepage: str) -> str:
+    for codepage, encoding in codepage_to_encoding.items():
+        if dxfcodepage.endswith(codepage):
+            return encoding
+    return "cp1252"
+
+
+def tocodepage(encoding: str) -> str:
+    return "ANSI_" + encoding_to_codepage.get(encoding, "1252")

server/venv/lib/python3.9/site-packages/ezdxf/tools/complex_ltype.py

@@ -0,0 +1,214 @@
+# Purpose: compiler for line type definitions
+# Copyright (c) 2018-2021, Manfred Moitzi
+# License: MIT License
+
+# Auszug acadlt.lin
+#
+# *RAND,Rand __ __ . __ __ . __ __ . __ __ . __ __ .
+# A,.5,-.25,.5,-.25,0,-.25
+# *RAND2,Rand (.5x) __.__.__.__.__.__.__.__.__.__.__.
+# A,.25,-.125,.25,-.125,0,-.125
+# *RANDX2,Rand (2x) ____  ____  .  ____  ____  .  ___
+# A,1.0,-.5,1.0,-.5,0,-.5
+#
+# *MITTE,Mitte ____ _ ____ _ ____ _ ____ _ ____ _ ____
+# A,1.25,-.25,.25,-.25
+# *CENTER2,Mitte (.5x) ___ _ ___ _ ___ _ ___ _ ___ _ ___
+# A,.75,-.125,.125,-.125
+# *MITTEX2,Mitte (2x) ________  __  ________  __  _____
+# A,2.5,-.5,.5,-.5
+#
+# ;;  Komplexe Linientypen
+# ;;
+# ;;  Dieser Datei sind komplexe Linientypen hinzugefügt worden.
+# ;;  Diese Linientypen wurden in LTYPESHP.LIN in
+# ;;  Release 13 definiert und wurden in ACAD.LIN in
+# ;;  Release 14 aufgenommen.
+# ;;
+# ;;  Diese Linientypdefinitionen verwenden LTYPESHP.SHX.
+# ;;
+# *GRENZE1,Grenze rund ----0-----0----0-----0----0-----0--
+# A,.25,-.1,[CIRC1,ltypeshp.shx,x=-.1,s=.1],-.1,1
+# *GRENZE2,Grenze eckig ----[]-----[]----[]-----[]----[]---
+# A,.25,-.1,[BOX,ltypeshp.shx,x=-.1,s=.1],-.1,1
+# *EISENBAHN,Eisenbahn -|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-
+# A,.15,[TRACK1,ltypeshp.shx,s=.25],.15
+# *ISOLATION,Isolation SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
+# A,.0001,-.1,[BAT,ltypeshp.shx,x=-.1,s=.1],-.2,[BAT,ltypeshp.shx,r=180,x=.1,s=.1],-.1
+# *HEISSWASSERLEITUNG,Heißwasserleitung ---- HW ---- HW ---- HW ----
+# A,.5,-.2,["HW",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.2
+# *GASLEITUNG,Gasleitung ----GAS----GAS----GAS----GAS----GAS----GAS--
+# A,.5,-.2,["GAS",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.25
+# *ZICKZACK,Zickzack /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
+# A,.0001,-.2,[ZIG,ltypeshp.shx,x=-.2,s=.2],-.4,[ZIG,ltypeshp.shx,r=180,x=.2,s=.2],-.2
+from __future__ import annotations
+from typing import TYPE_CHECKING, Iterable, Sequence, Union, Any
+from ezdxf.lldxf.const import DXFValueError, DXFTableEntryError
+from ezdxf.lldxf.tags import DXFTag, Tags
+
+if TYPE_CHECKING:  # import forward references
+    from ezdxf.document import Drawing
+
+Token = Union[str, float, list]
+
+
+def lin_compiler(definition: str) -> Sequence[DXFTag]:
+    """
+    Compiles line type definitions like 'A,.5,-.25,.5,-.25,0,-.25' or
+    'A,.5,-.2,["GAS",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.25' into DXFTags().
+
+    Args:
+        definition: definition string
+
+    Returns:
+        list of DXFTag()
+    """
+    # 'A,.5,-.2,["GAS",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.25'
+    # ['A', .5, -.2, ['TEXT', 'GAS', 'STANDARD', 's', .1, 'u', 0.0, 'x', -.1, 'y', -.05], -.25]
+    tags = []
+    for token in lin_parser(definition):
+        if token == "A":
+            continue
+        elif isinstance(token, float):
+            tags.append(
+                DXFTag(49, token)
+            )  # Dash, dot or space length (one entry per element)
+        elif isinstance(token, list):  # yield from
+            tags.append(compile_complex_definition(token))  # type: ignore
+    return tags
+
+
+class ComplexLineTypePart:
+    def __init__(self, type_: str, value, font: str = "STANDARD"):
+        self.type = type_
+        self.value = value
+        self.font = font
+        self.tags = Tags()
+
+    def complex_ltype_tags(self, doc: "Drawing") -> Sequence[DXFTag]:
+        def get_font_handle() -> str:
+            if self.type == "SHAPE":
+                # Create new shx or returns existing entry:
+                font = doc.styles.get_shx(self.font)
+            else:
+                try:
+                    # Case insensitive search for text style:
+                    font = doc.styles.get(self.font)
+                except DXFTableEntryError:
+                    font = doc.styles.new(self.font)
+            return font.dxf.handle
+
+        # Note: AutoCAD/BricsCAD do NOT report an error or even crash, if the
+        # text style handle is invalid!
+        if doc is not None:
+            handle = get_font_handle()
+        else:
+            handle = "0"
+        tags = []
+        if self.type == "TEXT":
+            tags.append(DXFTag(74, 2))
+            tags.append(DXFTag(75, 0))
+        else:  # SHAPE
+            tags.append(DXFTag(74, 4))
+            tags.append(DXFTag(75, self.value))
+        tags.append(DXFTag(340, handle))
+        tags.extend(self.tags)
+        if self.type == "TEXT":
+            tags.append(DXFTag(9, self.value))
+        return tags
+
+
+CMD_CODES = {
+    "s": 46,  # scaling factor
+    "r": 50,  # rotation angle, r == u
+    "u": 50,  # rotation angle
+    "x": 44,  # shift x units = parallel to line direction
+    "y": 45,  # shift y units = normal to line direction
+}
+
+
+def compile_complex_definition(tokens: Sequence) -> ComplexLineTypePart:
+    part = ComplexLineTypePart(tokens[0], tokens[1], tokens[2])
+    commands = list(reversed(tokens[3:]))
+    params = {}
+    while len(commands):
+        cmd = commands.pop()
+        value = commands.pop()
+        code = CMD_CODES.get(cmd, 0)
+        params[code] = DXFTag(code, value)
+
+    for code in (46, 50, 44, 45):
+        tag = params.get(code, DXFTag(code, 0.0))
+        part.tags.append(tag)
+    return part
+
+
+def lin_parser(definition: str) -> Sequence[Token]:
+    bag: list[Any] = []
+    sublist = None
+    first = True
+    for token in lin_tokenizer(definition):
+        if token == "A" and first:
+            bag.append(token)
+            first = False
+            continue
+
+        try:
+            value = float(token)  # only outside of TEXT or SHAPE definition
+            bag.append(value)
+            continue
+        except ValueError:
+            pass
+
+        if token.startswith("["):
+            if sublist is not None:
+                raise DXFValueError(
+                    "Complex line type error. {}".format(definition)
+                )
+            sublist = []
+            if token.startswith('["'):
+                sublist.append("TEXT")
+                sublist.append(
+                    token[2:-1]
+                )  # text without surrounding '["' and '"'
+            else:
+                sublist.append("SHAPE")
+                try:
+                    sublist.append(int(token[1:]))  # type: ignore # shape index! required
+                except ValueError:
+                    raise DXFValueError(
+                        "Complex line type with shapes requires shape index not shape name!"
+                    )
+        else:
+            _token = token.rstrip("]")
+            subtokens = _token.split("=")
+            if len(subtokens) == 2:
+                sublist.append(subtokens[0].lower())
+                sublist.append(float(subtokens[1]))  # type: ignore
+            else:
+                sublist.append(_token)
+        if token.endswith("]"):
+            if sublist is None:
+                raise DXFValueError(
+                    "Complex line type error. {}".format(definition)
+                )
+            bag.append(sublist)
+            sublist = None  # type: ignore
+    return bag
+
+
+def lin_tokenizer(definition: str) -> Iterable[str]:
+    token = ""
+    escape = False
+    for char in definition:
+        if char == "," and not escape:
+            yield token.strip()
+            token = ""
+            continue
+        token += char
+        if char == '"':
+            escape = not escape
+    if escape:
+        raise DXFValueError("Line type parsing error: '{}'".format(definition))
+    if token:
+        yield token.strip()

server/venv/lib/python3.9/site-packages/ezdxf/tools/crypt.py

@@ -0,0 +1,58 @@
+# Purpose: decode/encode DXF proprietary data
+# Created: 01.05.2014
+# Copyright (c) 2014-2018, Manfred Moitzi
+# License: MIT License
+from typing import Iterable
+
+_decode_table = {
+    0x20: ' ',
+    0x40: '_',
+    0x5F: '@',
+}
+for c in range(0x41, 0x5F):
+    _decode_table[c] = chr(0x41 + (0x5E - c))  # 0x5E -> 'A', 0x5D->'B', ...
+
+
+def decode(text_lines: Iterable[str]) -> Iterable[str]:
+    """ Decode the Standard :term:`ACIS` Text (SAT) format "encrypted" by AutoCAD. """
+    def _decode(text):
+        dectab = _decode_table  # fast local var
+        s = []
+        text = bytes(text, 'ascii')
+        skip = False
+        for c in text:
+            if skip:
+                skip = False
+                continue
+            if c in dectab:
+                s += dectab[c]
+                skip = (c == 0x5E)  # skip space after 'A'
+            else:
+                s += chr(c ^ 0x5F)
+        return ''.join(s)
+    return (_decode(line) for line in text_lines)
+
+
+_encode_table = {
+    ' ': ' ',  # 0x20
+    '_': '@',  # 0x40
+    '@': '_',  # 0x5F
+}
+for c in range(0x41, 0x5F):
+    _encode_table[chr(c)] = chr(0x5E - (c - 0x41))  # 0x5E->'A', 'B'->0x5D, ...
+
+
+def encode(text_lines: Iterable[str]) -> Iterable[str]:
+    """ Encode the Standard :term:`ACIS` Text (SAT) format by AutoCAD "encryption" algorithm. """
+    def _encode(text):
+        s = []
+        enctab = _encode_table  # fast local var
+        for c in text:
+            if c in enctab:
+                s += enctab[c]
+                if c == 'A':
+                    s += ' '  # append a space for an 'A' -> cryptography
+            else:
+                s += chr(ord(c) ^ 0x5F)
+        return ''.join(s)
+    return (_encode(line) for line in text_lines)

server/venv/lib/python3.9/site-packages/ezdxf/tools/debug.py

@@ -0,0 +1,54 @@
+#  Copyright (c) 2021, Manfred Moitzi
+#  License: MIT License
+from typing import Sequence
+
+
+def group_chars(s: str, n: int = 4, sep="-") -> str:
+    chars = []
+    for index, char in enumerate(reversed(s)):
+        if index % n == 0:
+            chars.append(sep)
+        chars.append(char)
+    if chars:
+        chars.reverse()
+        chars.pop()
+        return "".join(chars)
+    return ""
+
+
+def bitmask_strings(
+    value: int, base: int = 10, sep: str = "-"
+) -> Sequence[str]:
+    if base == 10:
+        top, bottom = (
+            "3322-2222-2222-1111-1111-1100-0000-0000",
+            "1098-7654-3210-9876-5432-1098-7654-3210",
+        )
+    elif base == 16:
+        top, bottom = (
+            "1111-1111-1111-1111-0000-0000-0000-0000",
+            "FEDC-BA98-7654-3210-FEDC-BA98-7654-3210",
+        )
+    else:
+        raise ValueError(f"invalid base {base}, valid bases: 10, 16")
+    top = top.replace("-", sep)
+    bottom = bottom.replace("-", sep)
+    l0 = len(top)
+    bin_str = group_chars(bin(value)[2:], n=4, sep=sep)
+    l1 = len(bin_str)
+    return [
+        top[l0 - l1 :],
+        bottom[l0 - l1 :],
+        bin_str,
+    ]
+
+
+def print_bitmask(value: int, *, base=10, sep="-"):
+    lines = bitmask_strings(value, base, sep)
+    assert len(lines) > 2
+    divider_line = "=" * (max(map(len, lines)) + 4)
+    print(divider_line)
+    print("x0 :" + lines[0])
+    print("0x :" + lines[1])
+    print(divider_line)
+    print("bin:" + lines[2])

server/venv/lib/python3.9/site-packages/ezdxf/tools/difftags.py

@@ -0,0 +1,80 @@
+#  Copyright (c) 2021-2022, Manfred Moitzi
+#  License: MIT License
+from __future__ import annotations
+from typing import Iterator, NamedTuple, Iterable, Optional
+from difflib import SequenceMatcher
+import enum
+
+from ezdxf.lldxf.tags import Tags
+from ezdxf.lldxf.types import DXFVertex, DXFTag
+
+__all__ = ["diff_tags", "print_diff", "OpCode"]
+
+# https://docs.python.org/3/library/difflib.html
+
+
+class OpCode(enum.Enum):
+    replace = enum.auto()
+    delete = enum.auto()
+    insert = enum.auto()
+    equal = enum.auto()
+
+
+class Operation(NamedTuple):
+    opcode: OpCode
+    i1: int
+    i2: int
+    j1: int
+    j2: int
+
+
+CONVERT = {
+    "replace": OpCode.replace,
+    "delete": OpCode.delete,
+    "insert": OpCode.insert,
+    "equal": OpCode.equal,
+}
+
+
+def convert_opcodes(opcodes) -> Iterator[Operation]:
+    for tag, i1, i2, j1, j2 in opcodes:
+        yield Operation(CONVERT[tag], i1, i2, j1, j2)
+
+
+def round_tags(tags: Tags, ndigits: int) -> Iterator[DXFTag]:
+    for tag in tags:
+        if isinstance(tag, DXFVertex):
+            yield DXFVertex(tag.code, (round(d, ndigits) for d in tag.value))
+        elif isinstance(tag.value, float):
+            yield DXFTag(tag.code, round(tag.value, ndigits))
+        else:
+            yield tag
+
+
+def diff_tags(
+    a: Tags, b: Tags, ndigits: Optional[int] = None
+) -> Iterator[Operation]:
+    if ndigits is not None:
+        a = Tags(round_tags(a, ndigits))
+        b = Tags(round_tags(b, ndigits))
+
+    sequencer = SequenceMatcher(a=a, b=b)
+    return convert_opcodes(sequencer.get_opcodes())
+
+
+def print_diff(a: Tags, b: Tags, operations: Iterable[Operation]):
+    t1: DXFTag
+    t2: DXFTag
+    print()
+    for op in operations:
+        if op.opcode == OpCode.insert:
+            for t1 in b[op.j1 : op.j2]:
+                print(f"insert a[{op.i1}:{op.i2}]: {t1}")
+        elif op.opcode == OpCode.replace:
+            for index, t1 in enumerate(a[op.i1 : op.i2], op.i1):
+                print(f"replace a[{index}]: {t1}")
+            for index, t2 in enumerate(b[op.j1 : op.j2], op.j1):
+                print(f"     by b[{index}]: {t2}")
+        elif op.opcode == OpCode.delete:
+            for index, t1 in enumerate(a[op.i1 : op.i2], op.i1):
+                print(f"delete a[{index}]: {t1}")

server/venv/lib/python3.9/site-packages/ezdxf/tools/handle.py

@@ -0,0 +1,48 @@
+# Copyright (c) 2011-2023, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import TYPE_CHECKING, Optional
+from ezdxf.lldxf.types import is_valid_handle
+
+if TYPE_CHECKING:
+    from ezdxf.document import Drawing
+
+START_HANDLE = "1"
+
+
+class HandleGenerator:
+    def __init__(self, start_value: str = START_HANDLE):
+        self._handle: int = max(1, int(start_value, 16))
+
+    reset = __init__
+
+    def __str__(self):
+        return "%X" % self._handle
+
+    def next(self) -> str:
+        next_handle = self.__str__()
+        self._handle += 1
+        return next_handle
+
+    __next__ = next
+
+    def copy(self) -> HandleGenerator:
+        return HandleGenerator(str(self))
+
+
+class UnderlayKeyGenerator(HandleGenerator):
+    def __str__(self):
+        return "Underlay%05d" % self._handle
+
+
+def safe_handle(handle: Optional[str], doc: Optional["Drawing"] = None) -> str:
+    if handle is None:
+        return "0"
+    assert isinstance(handle, str), "invalid type"
+    if doc is not None:
+        if handle not in doc.entitydb:
+            return "0"
+        return handle
+    if not is_valid_handle(handle):
+        return "0"
+    return handle.upper()

server/venv/lib/python3.9/site-packages/ezdxf/tools/indexing.py

@@ -0,0 +1,29 @@
+# created: 23.04.2018
+# Copyright (c) 2018 Manfred Moitzi
+# License: MIT License
+
+from typing import Iterable
+
+
+class Index:
+    def __init__(self, item):
+        try:
+            self.length = len(item)
+        except TypeError:
+            self.length = int(item)
+
+    def index(self, item: int, error=None) -> int:
+        if item < 0:
+            result = self.length + int(item)
+        else:
+            result = int(item)
+        if error and not (0 <= result < self.length):
+            raise error('index out of range')
+        return result
+
+    def slicing(self, *args) -> Iterable[int]:
+        if isinstance(args[0], slice):
+            s = args[0]
+        else:
+            s = slice(*args)
+        return range(*s.indices(self.length))

server/venv/lib/python3.9/site-packages/ezdxf/tools/juliandate.py

@@ -0,0 +1,71 @@
+# Copyright (c) 2011-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from math import floor
+from datetime import datetime
+
+
+def frac(number: float) -> float:
+    return number - floor(number)
+
+
+class JulianDate:
+    def __init__(self, date: datetime):
+        self.date = date
+        self.result: float = self.julian_date() + self.fractional_day()
+
+    def fractional_day(self) -> float:
+        seconds = (
+            self.date.hour * 3600.0 + self.date.minute * 60.0 + self.date.second
+        )
+        return seconds / 86400.0
+
+    def julian_date(self) -> float:
+        y = self.date.year + (float(self.date.month) - 2.85) / 12.0
+        A = floor(367.0 * y) - 1.75 * floor(y) + self.date.day
+        B = floor(A) - 0.75 * floor(y / 100.0)
+        return floor(B) + 1721115.0
+
+
+class CalendarDate:
+    def __init__(self, juliandate: float):
+        self.jdate = juliandate
+        year, month, day = self.get_date()
+        hour, minute, second = frac2time(self.jdate)
+        self.result = datetime(year, month, day, hour, minute, second)
+
+    def get_date(self) -> tuple[int, int, int]:
+        Z = floor(self.jdate)
+
+        if Z < 2299161:
+            A = Z  # julian calendar
+        else:
+            g = floor((Z - 1867216.25) / 36524.25)  # gregorian calendar
+            A = Z + 1 + g - floor(g / 4.0)
+
+        B = A + 1524.
+        C = floor((B - 122.1) / 365.25)
+        D = floor(365.25 * C)
+        E = floor((B - D) / 30.6001)
+
+        day = B - D - floor(30.6001 * E)
+        month = E - 1 if E < 14 else E - 13
+        year = C - 4716 if month > 2 else C - 4715
+        return int(year), int(month), int(day)
+
+
+def frac2time(jdate) -> tuple[int, int, int]:
+    seconds = int(frac(jdate) * 86400.0)
+    hour = int(seconds / 3600)
+    seconds = seconds % 3600
+    minute = int(seconds / 60)
+    second = seconds % 60
+    return hour, minute, second
+
+
+def juliandate(date: datetime) -> float:
+    return JulianDate(date).result
+
+
+def calendardate(juliandate: float) -> datetime:
+    return CalendarDate(juliandate).result

server/venv/lib/python3.9/site-packages/ezdxf/tools/pattern.py

@@ -0,0 +1,190 @@
+# Copyright (c) 2015-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Sequence, Tuple, Optional
+from typing_extensions import TypeAlias
+from ezdxf.math import Vec2
+from ._iso_pattern import ISO_PATTERN
+
+# Predefined hatch pattern prior to ezdxf v0.11 were scaled for imperial units,
+# and were too small for ISO units by a factor of 1/25.4, to replicate this
+# pattern scaling use load(measurement=0).
+
+__all__ = [
+    "load",
+    "scale_pattern",
+    "scale_all",
+    "parse",
+    "ISO_PATTERN",
+    "IMPERIAL_PATTERN",
+    "HatchPatternLineType",
+    "HatchPatternType",
+    "PatternAnalyser",
+]
+IMPERIAL_SCALE_FACTOR = 1.0 / 25.4
+HatchPatternLineType: TypeAlias = Tuple[
+    float, Sequence[float], Sequence[float], Sequence[float]
+]
+HatchPatternType: TypeAlias = Sequence[HatchPatternLineType]
+
+
+def load(measurement: int = 1, factor: Optional[float] = None):
+    """Load hatch pattern definition, default scaling is like the iso.pat of
+    BricsCAD, set `measurement` to 0 to use the imperial (US) scaled pattern,
+    which has a scaling factor of 1/25.4 = ~0.03937.
+
+    Args:
+        measurement: like the $MEASUREMENT header variable, 0 to user imperial
+            scaled pattern, 1 to use ISO scaled pattern.
+        factor: hatch pattern scaling factor, overrides `measurement`
+
+    Returns: hatch pattern dict of scaled pattern
+
+    """
+    if factor is None:
+        factor = 1.0 if measurement == 1 else IMPERIAL_SCALE_FACTOR
+    pattern = ISO_PATTERN
+    if factor != 1.0:
+        pattern = scale_all(pattern, factor=factor)
+    return pattern
+
+
+def scale_pattern(
+    pattern: HatchPatternType, factor: float = 1, angle: float = 0
+) -> HatchPatternType:
+    ndigits = 10
+
+    def _scale(iterable) -> Sequence[float]:
+        return [round(i * factor, ndigits) for i in iterable]
+
+    def _scale_line(line) -> HatchPatternLineType:
+        angle0, base_point, offset, dash_length_items = line
+        if angle:
+            base_point = Vec2(base_point).rotate_deg(angle)
+            offset = Vec2(offset).rotate_deg(angle)
+            angle0 = (angle0 + angle) % 360.0
+
+        # noinspection PyTypeChecker
+        return [  # type: ignore
+            round(angle0, ndigits),
+            tuple(_scale(base_point)),
+            tuple(_scale(offset)),
+            _scale(dash_length_items),
+        ]
+
+    return [_scale_line(line) for line in pattern]
+
+
+def scale_all(pattern: dict, factor: float = 1, angle: float = 0):
+    return {name: scale_pattern(p, factor, angle) for name, p in pattern.items()}
+
+
+def parse(pattern: str) -> dict:
+    try:
+        comp = PatternFileCompiler(pattern)
+        return comp.compile_pattern()
+    except Exception:
+        raise ValueError("Incompatible pattern definition.")
+
+
+def _tokenize_pattern_line(line: str) -> list:
+    return line.split(",", maxsplit=1 if line.startswith("*") else -1)
+
+
+class PatternFileCompiler:
+    def __init__(self, content: str):
+        self._lines = [
+            _tokenize_pattern_line(line)
+            for line in (line.strip() for line in content.split("\n"))
+            if line and line[0] != ";"
+        ]
+
+    def _parse_pattern(self):
+        pattern = []
+        for line in self._lines:
+            if line[0].startswith("*"):
+                if pattern:
+                    yield pattern
+                pattern = [[line[0][1:], line[1]]]  # name, description
+            else:
+                pattern.append([float(e) for e in line])  # list[floats]
+
+        if pattern:
+            yield pattern
+
+    def compile_pattern(self, ndigits: int = 10) -> dict:
+        pattern = dict()
+        for p in self._parse_pattern():
+            pat = []
+            for line in p[1:]:
+                # offset before rounding:
+                offset = Vec2(line[3], line[4])
+
+                # round all values:
+                line = [round(e, ndigits) for e in line]
+                pat_line = []
+
+                angle = line[0]
+                pat_line.append(angle)
+
+                # base point:
+                pat_line.append((line[1], line[2]))
+
+                # rotate offset:
+                offset = offset.rotate_deg(angle)
+                pat_line.append((round(offset.x, ndigits), round(offset.y, ndigits)))
+
+                # line dash pattern
+                pat_line.append(line[5:])
+                pat.append(pat_line)
+            pattern[p[0][0]] = pat
+        return pattern
+
+
+IMPERIAL_PATTERN = load(measurement=0)
+
+
+def is_solid(pattern: Sequence[float]) -> bool:
+    return not bool(len(pattern))
+
+
+def round_angle_15_deg(angle: float) -> int:
+    return round((angle % 180) / 15) * 15
+
+
+class PatternAnalyser:
+    def __init__(self, pattern: HatchPatternType):
+        # List of 2-tuples: (angle, is solid line pattern)
+        # angle is rounded to a multiple of 15° in the range [0, 180)
+        self._lines: list[tuple[int, bool]] = [
+            (round_angle_15_deg(angle), is_solid(line_pattern))
+            for angle, _, _, line_pattern in pattern
+        ]
+
+    def has_angle(self, angle: int) -> bool:
+        return any(angle_ == angle for angle_, _ in self._lines)
+
+    def all_angles(self, angle: int) -> bool:
+        return all(angle_ == angle for angle_, _ in self._lines)
+
+    def has_line(self, angle: int, solid: bool) -> bool:
+        return any(
+            angle_ == angle and solid_ == solid for angle_, solid_ in self._lines
+        )
+
+    def all_lines(self, angle: int, solid: bool) -> bool:
+        return all(
+            angle_ == angle and solid_ == solid for angle_, solid_ in self._lines
+        )
+
+    def has_solid_line(self) -> bool:
+        return any(solid for _, solid in self._lines)
+
+    def has_dashed_line(self) -> bool:
+        return any(not solid for _, solid in self._lines)
+
+    def all_solid_lines(self) -> bool:
+        return all(solid for _, solid in self._lines)
+
+    def all_dashed_lines(self) -> bool:
+        return all(not solid for _, solid in self._lines)

server/venv/lib/python3.9/site-packages/ezdxf/tools/rawloader.py

@@ -0,0 +1,36 @@
+# Copyright (c) 2021-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Union, Iterable, TYPE_CHECKING
+from pathlib import Path
+
+from ezdxf.lldxf import loader
+from ezdxf.lldxf.types import DXFTag
+from ezdxf.lldxf.tagger import ascii_tags_loader
+from ezdxf.lldxf.validator import is_dxf_file
+from ezdxf.filemanagement import dxf_file_info
+
+if TYPE_CHECKING:
+    from ezdxf.eztypes import SectionDict
+
+
+def raw_structure_loader(filename: Union[str, Path]) -> SectionDict:
+    """Load content of ASCII DXF file `filename` as SectionDict, all tags are in
+    raw format with the group code as integer and the value as string: (int, str).
+
+    """
+    tagger = get_tag_loader(filename)
+    return loader.load_dxf_structure(tagger)
+
+
+def get_tag_loader(
+    filename: Union[str, Path], errors: str = "ignore"
+) -> Iterable[DXFTag]:
+
+    filename = str(filename)
+    if not is_dxf_file(filename):
+        raise IOError(f"File '{filename}' is not an ASCII DXF file.")
+
+    info = dxf_file_info(filename)
+    with open(filename, mode="rt", encoding=info.encoding, errors=errors) as fp:
+        return list(ascii_tags_loader(fp, skip_comments=True))

server/venv/lib/python3.9/site-packages/ezdxf/tools/strip.py

@@ -0,0 +1,192 @@
+# Copyright (c) 2021-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import BinaryIO, Optional, Sequence
+from ezdxf.lldxf.validator import is_dxf_file, DXFStructureError
+from pathlib import Path
+
+
+class TagWriter:
+    def __init__(self, fp: BinaryIO):
+        self.fp = fp
+
+    def write(self, raw_code_str: bytes, raw_value_str: bytes):
+        self.fp.write(raw_code_str)
+        self.fp.write(raw_value_str)
+
+
+class ThumbnailRemover(TagWriter):
+    def __init__(self, fp: BinaryIO):
+        super().__init__(fp)
+        self._start_section = False
+        self._skip_tags = False
+        self._section_code: Optional[bytes] = None
+        self._section_value: Optional[bytes] = None
+        self.removed_thumbnail_image = False
+
+    def write(self, raw_code_str: bytes, raw_value_str: bytes):
+        code = raw_code_str.strip()
+        value = raw_value_str.strip()
+        if self._start_section:
+            self._start_section = False
+            if code == b"2" and value == b"THUMBNAILIMAGE":
+                self._skip_tags = True
+                self.removed_thumbnail_image = True
+            else:
+                # write buffered section tag:
+                super().write(self._section_code, self._section_value)  # type: ignore
+
+        if code == b"0":
+            if value == b"SECTION":
+                self._start_section = True
+                self._skip_tags = False
+                # buffer section tag:
+                self._section_code = raw_code_str
+                self._section_value = raw_value_str
+                return
+            elif value == b"ENDSEC":
+                skip = self._skip_tags
+                self._skip_tags = False
+                if skip:  # don't write ENDSEC
+                    return
+
+        if not self._skip_tags:
+            super().write(raw_code_str, raw_value_str)
+
+
+def strip_tags(
+    infile: BinaryIO,
+    tagwriter: TagWriter,
+    codes: Sequence[int],
+    verbose=False,
+) -> int:
+    search_codes = set(codes)
+    line_number: int = 1
+    removed_tags: int = 0
+    while True:
+        try:
+            raw_code_str = infile.readline()
+        except EOFError:
+            raw_code_str = b""
+        if raw_code_str == b"":  # regular end of file
+            return removed_tags
+        try:
+            code = int(raw_code_str)
+        except ValueError:
+            code_str = raw_code_str.strip().decode(encoding="utf8", errors="ignore")
+            raise DXFStructureError(
+                f'CANCELED: "{infile.name}" - found invalid '
+                f'group code "{code_str}" at line {line_number}'
+            )
+
+        try:
+            raw_value_str = infile.readline()
+        except EOFError:
+            raw_value_str = b""
+
+        if raw_value_str == b"":
+            raise DXFStructureError(
+                f'CANCELED: "{infile.name}" - premature end of file'
+            )
+        line_number += 2
+        if code not in search_codes:
+            tagwriter.write(raw_code_str, raw_value_str)
+        else:
+            if verbose:
+                value = raw_value_str.strip()
+                _value = value.decode(encoding="utf8", errors="ignore")
+                print(f'removing tag: ({code}, "{_value}")')
+            removed_tags += 1
+
+
+def safe_rename(source: Path, target: Path, backup=True, verbose=False) -> bool:
+    backup_file = target.with_suffix(".bak")
+    backup_file.unlink(missing_ok=True)
+    _target = Path(target)
+    if _target.exists():
+        if verbose:
+            print(f'renaming "{_target.name}" to "{backup_file.name}"')
+        try:
+            _target.rename(backup_file)
+        except IOError as e:
+            print(f"IOError: {str(e)}")
+            return False
+
+    if verbose:
+        print(f'renaming "{source.name}" to "{target.name}"')
+    try:
+        source.rename(target)
+    except IOError as e:
+        print(f"IOError: {str(e)}")
+        return False
+
+    if not backup:
+        if verbose:
+            print(f'deleting backup file "{backup_file.name}"')
+        backup_file.unlink(missing_ok=True)
+    return True
+
+
+DEFAULT_CODES = (999,)
+
+
+def strip(
+    filename: str,
+    backup=False,
+    thumbnail=False,
+    verbose=False,
+    codes: Sequence[int] = DEFAULT_CODES,
+):
+    def remove_tmp_file():
+        if tmp_file.exists():
+            if verbose:
+                print(f'deleting temp file: "{tmp_file.name}"')
+            tmp_file.unlink(missing_ok=True)
+
+    if verbose:
+        print(f'\nProcessing file: "{filename}"')
+    try:
+        if not is_dxf_file(filename):
+            print(
+                f'CANCELED: "{filename}" is not a DXF file, binary DXF files '
+                f"are not supported"
+            )
+            return
+    except IOError as e:
+        print(f"IOError: {str(e)}")
+        return
+    source_file = Path(filename)
+    tmp_file = source_file.with_suffix(".ezdxf.tmp")
+    error = False
+    tagwriter: TagWriter
+    if verbose:
+        print(f'make a temporary copy: "{tmp_file.name}"')
+    with open(tmp_file, "wb") as fp, open(source_file, "rb") as infile:
+        if thumbnail:
+            tagwriter = ThumbnailRemover(fp)
+        else:
+            tagwriter = TagWriter(fp)
+        try:
+            removed_tags = strip_tags(infile, tagwriter, codes=codes, verbose=verbose)
+        except IOError as e:
+            print(f"IOError: {str(e)}")
+            error = True
+        except DXFStructureError as e:
+            print(str(e))
+            error = True
+
+    if not error:
+        rename = False
+        if thumbnail and tagwriter.removed_thumbnail_image:  # type: ignore
+            print(f'"{source_file.name}" - removed THUMBNAILIMAGE section')
+            rename = True
+
+        if removed_tags > 0:
+            tags = "tag" if removed_tags == 1 else "tags"
+            print(f'"{source_file.name}" - {removed_tags} {tags} removed')
+            rename = True
+
+        if rename:
+            safe_rename(tmp_file, source_file, backup, verbose)
+
+    remove_tmp_file()

server/venv/lib/python3.9/site-packages/ezdxf/tools/test.py

@@ -0,0 +1,50 @@
+# Copyright (c) 2011-2022, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Sequence, TYPE_CHECKING, Iterable
+from ezdxf.lldxf.tagger import internal_tag_compiler
+
+if TYPE_CHECKING:
+    from ezdxf.lldxf.types import DXFTag
+    from ezdxf.lldxf.extendedtags import ExtendedTags
+
+
+def compile_tags_without_handles(text: str) -> Iterable[DXFTag]:
+    return (
+        tag for tag in internal_tag_compiler(text) if tag.code not in (5, 105)
+    )
+
+
+def normlines(text: str) -> Sequence[str]:
+    lines = text.split("\n")
+    return [line.strip() for line in lines]
+
+
+def load_section(text: str, name: str) -> list[ExtendedTags]:
+    from ezdxf.lldxf.loader import load_dxf_structure
+
+    dxf = load_dxf_structure(
+        internal_tag_compiler(text), ignore_missing_eof=True
+    )
+    return dxf[name]  # type: ignore
+
+
+def load_entities(text: str, name: str):
+    from ezdxf.lldxf.loader import load_dxf_structure, load_dxf_entities
+
+    dxf = load_dxf_structure(
+        internal_tag_compiler(text), ignore_missing_eof=True
+    )
+    return load_dxf_entities(dxf[name])  # type: ignore
+
+
+def parse_hex_dump(txt: str) -> bytes:
+    b = bytearray()
+    lines = txt.split("\n")
+    for line in lines:
+        if line == "":
+            continue
+        data = [int(v, 16) for v in line.strip().split(" ")]
+        assert data[0] == len(b)
+        b.extend(data[1:])
+    return b

server/venv/lib/python3.9/site-packages/ezdxf/tools/text_size.py

@@ -0,0 +1,197 @@
+# Copyright (c) 2021-2023, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import Sequence, Optional
+from dataclasses import dataclass
+
+from ezdxf.math import Matrix44, Vec2
+from ezdxf.entities import Text, MText, get_font_name
+from ezdxf.fonts import fonts
+from ezdxf.tools import text_layout as tl
+from ezdxf.tools.text import MTextContext
+from ezdxf.render.abstract_mtext_renderer import AbstractMTextRenderer
+from ezdxf.tools.text import estimate_mtext_extents
+
+__all__ = [
+    "text_size",
+    "mtext_size",
+    "TextSize",
+    "MTextSize",
+    "WordSizeDetector",
+    # estimate_mtext_extents() belongs also to the topic of this module, users
+    # may look here first
+    "estimate_mtext_extents",
+]
+
+
+@dataclass(frozen=True)
+class TextSize:
+    width: float
+    # The text entity has a fixed font:
+    cap_height: float  # height of "X" without descender
+    total_height: float  # including the descender
+
+
+@dataclass(frozen=True)
+class MTextSize:
+    total_width: float
+    total_height: float
+    column_width: float
+    gutter_width: float
+    column_heights: Sequence[float]
+
+    # Storing additional font metrics like "cap_height" makes no sense, because
+    # the font metrics can be variable by using inline codes to vary the text
+    # height or the width factor or even changing the used font at all.
+    @property
+    def column_count(self) -> int:
+        return len(self.column_heights)
+
+
+def text_size(text: Text) -> TextSize:
+    """Returns the measured text width, the font cap-height and the font
+    total-height for a :class:`~ezdxf.entities.Text` entity.
+    This function uses the optional `Matplotlib` package if available to measure
+    the final rendering width and font-height for the :class:`Text` entity as
+    close as possible. This function does not measure the real char height!
+    Without access to the `Matplotlib` package the
+    :class:`~ezdxf.tools.fonts.MonospaceFont` is used and the measurements are
+    very inaccurate.
+
+    See the :mod:`~ezdxf.addons.text2path` add-on for more tools to work
+    with the text path objects created by the `Matplotlib` package.
+
+    """
+    width_factor: float = text.dxf.get_default("width")
+    text_width: float = 0.0
+    cap_height: float = text.dxf.get_default("height")
+    font: fonts.AbstractFont = fonts.MonospaceFont(cap_height, width_factor)
+    if text.doc is not None:
+        font_name = get_font_name(text)
+        font = fonts.make_font(font_name, cap_height, width_factor)
+
+    total_height = font.measurements.total_height
+    content = text.plain_text()
+    if content:
+        text_width = font.text_width(content)
+    return TextSize(text_width, cap_height, total_height)
+
+
+def mtext_size(
+    mtext: MText, tool: Optional[MTextSizeDetector] = None
+) -> MTextSize:
+    """Returns the total-width, -height and columns information for a
+    :class:`~ezdxf.entities.MText` entity.
+
+    This function uses the optional `Matplotlib` package if available to do
+    font measurements and the internal text layout engine to determine the final
+    rendering size for the :class:`MText` entity as close as possible.
+    Without access to the `Matplotlib` package the :class:`~ezdxf.tools.fonts.MonospaceFont`
+    is used and the measurements are very inaccurate.
+
+    Attention: The required full layout calculation is slow!
+
+    The first call to this function with `Matplotlib` support is very slow,
+    because `Matplotlib` lookup all available fonts on the system. To speedup
+    the calculation and accepting inaccurate results you can disable the
+    `Matplotlib` support manually::
+
+        ezdxf.option.use_matplotlib = False
+
+    """
+    tool = tool or MTextSizeDetector()
+    column_heights: list[float] = [0.0]
+    gutter_width = 0.0
+    column_width = 0.0
+    if mtext.text:
+        columns: list[tl.Column] = list(tool.measure(mtext))
+        if len(columns):
+            first_column = columns[0]
+            # same values for all columns
+            column_width = first_column.total_width
+            gutter_width = first_column.gutter
+            column_heights = [column.total_height for column in columns]
+
+    count = len(column_heights)
+    return MTextSize(
+        total_width=column_width * count + gutter_width * (count - 1),
+        total_height=max(column_heights),
+        column_width=column_width,
+        gutter_width=gutter_width,
+        column_heights=tuple(column_heights),
+    )
+
+
+class MTextSizeDetector(AbstractMTextRenderer):
+    def __init__(self):
+        super().__init__()
+        self.do_nothing = tl.DoNothingRenderer()
+        self.renderer = self.do_nothing
+
+    def reset(self):
+        pass
+
+    def word(self, text: str, ctx: MTextContext) -> tl.ContentCell:
+        return tl.Text(
+            # The first call to get_font() is very slow!
+            width=self.get_font(ctx).text_width(text),
+            height=ctx.cap_height,
+            valign=tl.CellAlignment(ctx.align),
+            renderer=self.renderer,
+        )
+
+    def fraction(self, data: tuple, ctx: MTextContext) -> tl.ContentCell:
+        upr, lwr, type_ = data
+        if type_:
+            return tl.Fraction(
+                top=self.word(upr, ctx),
+                bottom=self.word(lwr, ctx),
+                stacking=self.get_stacking(type_),
+                renderer=self.renderer,
+            )
+        else:
+            return self.word(upr, ctx)
+
+    def get_font_face(self, mtext: MText) -> fonts.FontFace:
+        return fonts.get_entity_font_face(mtext)
+
+    def make_bg_renderer(self, mtext: MText) -> tl.ContentRenderer:
+        return self.do_nothing
+
+    def measure(self, mtext: MText) -> tl.Layout:
+        self.reset()
+        layout = self.layout_engine(mtext)
+        layout.place()
+        return layout
+
+
+class WordSizeCollector(tl.DoNothingRenderer):
+    """Collects word sizes as tuples of the lower left corner and the upper
+    right corner as Vec2 objects, ignores lines.
+    """
+
+    def __init__(self) -> None:
+        self.word_boxes: list[tuple[Vec2, Vec2]] = []
+
+    def render(
+        self,
+        left: float,
+        bottom: float,
+        right: float,
+        top: float,
+        m: Optional[Matrix44] = None,
+    ) -> None:
+        self.word_boxes.append((Vec2(left, bottom), Vec2(right, top)))
+
+
+class WordSizeDetector(MTextSizeDetector):
+    def reset(self):
+        self.renderer = WordSizeCollector()
+
+    def measure(self, mtext: MText) -> tl.Layout:
+        layout = super().measure(mtext)
+        layout.render()
+        return layout
+
+    def word_boxes(self) -> list[tuple[Vec2, Vec2]]:
+        return self.renderer.word_boxes

server/venv/lib/python3.9/site-packages/ezdxf/tools/zipmanager.py

@@ -0,0 +1,87 @@
+# Copyright (c) 2014-2023, Manfred Moitzi
+# License: MIT License
+from __future__ import annotations
+from typing import BinaryIO, cast, TextIO, Optional, Iterator
+import zipfile
+from contextlib import contextmanager
+
+from ezdxf.lldxf.validator import is_dxf_stream, dxf_info
+
+CRLF = b"\r\n"
+LF = b"\n"
+
+
+class ZipReader:
+    def __init__(self, zip_archive_name: str, errors="surrogateescape"):
+        if not zipfile.is_zipfile(zip_archive_name):
+            raise IOError(f"'{zip_archive_name}' is not a zip archive.")
+        self.zip_archive_name = zip_archive_name
+        self.zip_archive: Optional[zipfile.ZipFile] = None
+        self.dxf_file_name: Optional[str] = None
+        self.dxf_file: Optional[BinaryIO] = None
+        self.encoding = "cp1252"
+        self.errors = errors
+        self.dxfversion = "AC1009"
+
+    def open(self, dxf_file_name: Optional[str] = None) -> None:
+        def open_dxf_file() -> BinaryIO:
+            # Open always in binary mode:
+            return cast(BinaryIO, self.zip_archive.open(self.dxf_file_name))  # type: ignore
+
+        self.zip_archive = zipfile.ZipFile(self.zip_archive_name)
+        self.dxf_file_name = (
+            dxf_file_name
+            if dxf_file_name is not None
+            else self.get_first_dxf_file_name()
+        )
+        self.dxf_file = open_dxf_file()
+
+        # Reading with standard encoding 'cp1252' - readline() fails if leading
+        # comments contain none ASCII characters.
+        if not is_dxf_stream(cast(TextIO, self)):
+            raise IOError(f"'{self.dxf_file_name}' is not a DXF file.")
+        self.dxf_file = open_dxf_file()  # restart
+        self.get_dxf_info()
+        self.dxf_file = open_dxf_file()  # restart
+
+    def get_first_dxf_file_name(self) -> str:
+        dxf_file_names = self.get_dxf_file_names()
+        if len(dxf_file_names) > 0:
+            return dxf_file_names[0]
+        else:
+            raise IOError("No DXF files found.")
+
+    def get_dxf_file_names(self) -> list[str]:
+        assert self.zip_archive is not None
+        return [
+            name
+            for name in self.zip_archive.namelist()
+            if name.lower().endswith(".dxf")
+        ]
+
+    def get_dxf_info(self) -> None:
+        info = dxf_info(cast(TextIO, self))
+        # Since DXF R2007 (AC1021) file encoding is always 'utf-8'
+        self.encoding = info.encoding if info.version < "AC1021" else "utf-8"
+        self.dxfversion = info.version
+
+    def readline(self) -> str:
+        assert self.dxf_file is not None
+        next_line = self.dxf_file.readline().replace(CRLF, LF)
+        return str(next_line, self.encoding, self.errors)
+
+    def close(self) -> None:
+        assert self.zip_archive is not None
+        self.zip_archive.close()
+
+
+@contextmanager
+def ctxZipReader(
+    zipfilename: str,
+    filename: Optional[str] = None,
+    errors: str = "surrogateescape",
+) -> Iterator[ZipReader]:
+    zip_reader = ZipReader(zipfilename, errors=errors)
+    zip_reader.open(filename)
+    yield zip_reader
+    zip_reader.close()