1 files changed, 188 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/pptx/opc/oxml.py b/.venv/lib/python3.12/site-packages/pptx/opc/oxml.py
new file mode 100644
index 00000000..5dd902a5
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pptx/opc/oxml.py
@@ -0,0 +1,188 @@
+"""OPC-local oxml module to handle OPC-local concerns like relationship parsing."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Callable, cast
+
+from lxml import etree
+
+from pptx.opc.constants import NAMESPACE as NS
+from pptx.opc.constants import RELATIONSHIP_TARGET_MODE as RTM
+from pptx.oxml import parse_xml, register_element_cls
+from pptx.oxml.simpletypes import (
+    ST_ContentType,
+    ST_Extension,
+    ST_TargetMode,
+    XsdAnyUri,
+    XsdId,
+)
+from pptx.oxml.xmlchemy import (
+    BaseOxmlElement,
+    OptionalAttribute,
+    RequiredAttribute,
+    ZeroOrMore,
+)
+
+if TYPE_CHECKING:
+    from pptx.opc.packuri import PackURI
+
+nsmap = {
+    "ct": NS.OPC_CONTENT_TYPES,
+    "pr": NS.OPC_RELATIONSHIPS,
+    "r": NS.OFC_RELATIONSHIPS,
+}
+
+
+def oxml_to_encoded_bytes(
+    element: BaseOxmlElement,
+    encoding: str = "utf-8",
+    pretty_print: bool = False,
+    standalone: bool | None = None,
+) -> bytes:
+    return etree.tostring(
+        element, encoding=encoding, pretty_print=pretty_print, standalone=standalone
+    )
+
+
+def oxml_tostring(
+    elm: BaseOxmlElement,
+    encoding: str | None = None,
+    pretty_print: bool = False,
+    standalone: bool | None = None,
+):
+    return etree.tostring(elm, encoding=encoding, pretty_print=pretty_print, standalone=standalone)
+
+
+def serialize_part_xml(part_elm: BaseOxmlElement) -> bytes:
+    """Produce XML-file bytes for `part_elm`, suitable for writing directly to a `.xml` file.
+
+    Includes XML-declaration header.
+    """
+    return etree.tostring(part_elm, encoding="UTF-8", standalone=True)
+
+
+class CT_Default(BaseOxmlElement):
+    """`<Default>` element.
+
+    Specifies the default content type to be applied to a part with the specified extension.
+    """
+
+    extension: str = RequiredAttribute(  # pyright: ignore[reportAssignmentType]
+        "Extension", ST_Extension
+    )
+    contentType: str = RequiredAttribute(  # pyright: ignore[reportAssignmentType]
+        "ContentType", ST_ContentType
+    )
+
+
+class CT_Override(BaseOxmlElement):
+    """`<Override>` element.
+
+    Specifies the content type to be applied for a part with the specified partname.
+    """
+
+    partName: str = RequiredAttribute(  # pyright: ignore[reportAssignmentType]
+        "PartName", XsdAnyUri
+    )
+    contentType: str = RequiredAttribute(  # pyright: ignore[reportAssignmentType]
+        "ContentType", ST_ContentType
+    )
+
+
+class CT_Relationship(BaseOxmlElement):
+    """`<Relationship>` element.
+
+    Represents a single relationship from a source to a target part.
+    """
+
+    rId: str = RequiredAttribute("Id", XsdId)  # pyright: ignore[reportAssignmentType]
+    reltype: str = RequiredAttribute("Type", XsdAnyUri)  # pyright: ignore[reportAssignmentType]
+    target_ref: str = RequiredAttribute(  # pyright: ignore[reportAssignmentType]
+        "Target", XsdAnyUri
+    )
+    targetMode: str = OptionalAttribute(  # pyright: ignore[reportAssignmentType]
+        "TargetMode", ST_TargetMode, default=RTM.INTERNAL
+    )
+
+    @classmethod
+    def new(
+        cls, rId: str, reltype: str, target_ref: str, target_mode: str = RTM.INTERNAL
+    ) -> CT_Relationship:
+        """Return a new `<Relationship>` element.
+
+        `target_ref` is either a partname or a URI.
+        """
+        relationship = cast(CT_Relationship, parse_xml(f'<Relationship xmlns="{nsmap["pr"]}"/>'))
+        relationship.rId = rId
+        relationship.reltype = reltype
+        relationship.target_ref = target_ref
+        relationship.targetMode = target_mode
+        return relationship
+
+
+class CT_Relationships(BaseOxmlElement):
+    """`<Relationships>` element, the root element in a .rels file."""
+
+    relationship_lst: list[CT_Relationship]
+    _insert_relationship: Callable[[CT_Relationship], CT_Relationship]
+
+    relationship = ZeroOrMore("pr:Relationship")
+
+    def add_rel(
+        self, rId: str, reltype: str, target: str, is_external: bool = False
+    ) -> CT_Relationship:
+        """Add a child `<Relationship>` element with attributes set as specified."""
+        target_mode = RTM.EXTERNAL if is_external else RTM.INTERNAL
+        relationship = CT_Relationship.new(rId, reltype, target, target_mode)
+        return self._insert_relationship(relationship)
+
+    @classmethod
+    def new(cls) -> CT_Relationships:
+        """Return a new `<Relationships>` element."""
+        return cast(CT_Relationships, parse_xml(f'<Relationships xmlns="{nsmap["pr"]}"/>'))
+
+    @property
+    def xml_file_bytes(self) -> bytes:
+        """Return XML bytes, with XML-declaration, for this `<Relationships>` element.
+
+        Suitable for saving in a .rels stream, not pretty printed and with an XML declaration at
+        the top.
+        """
+        return oxml_to_encoded_bytes(self, encoding="UTF-8", standalone=True)
+
+
+class CT_Types(BaseOxmlElement):
+    """`<Types>` element.
+
+    The container element for Default and Override elements in [Content_Types].xml.
+    """
+
+    default_lst: list[CT_Default]
+    override_lst: list[CT_Override]
+
+    _add_default: Callable[..., CT_Default]
+    _add_override: Callable[..., CT_Override]
+
+    default = ZeroOrMore("ct:Default")
+    override = ZeroOrMore("ct:Override")
+
+    def add_default(self, ext: str, content_type: str) -> CT_Default:
+        """Add a child `<Default>` element with attributes set to parameter values."""
+        return self._add_default(extension=ext, contentType=content_type)
+
+    def add_override(self, partname: PackURI, content_type: str) -> CT_Override:
+        """Add a child `<Override>` element with attributes set to parameter values."""
+        return self._add_override(partName=partname, contentType=content_type)
+
+    @classmethod
+    def new(cls) -> CT_Types:
+        """Return a new `<Types>` element."""
+        return cast(CT_Types, parse_xml(f'<Types xmlns="{nsmap["ct"]}"/>'))
+
+
+register_element_cls("ct:Default", CT_Default)
+register_element_cls("ct:Override", CT_Override)
+register_element_cls("ct:Types", CT_Types)
+
+register_element_cls("pr:Relationship", CT_Relationship)
+register_element_cls("pr:Relationships", CT_Relationships)