1 files changed, 109 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/pptx/opc/packuri.py b/.venv/lib/python3.12/site-packages/pptx/opc/packuri.py
new file mode 100644
index 00000000..74ddd333
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/pptx/opc/packuri.py
@@ -0,0 +1,109 @@
+"""Provides the PackURI value type and known pack-URI strings such as PACKAGE_URI."""
+
+from __future__ import annotations
+
+import posixpath
+import re
+
+
+class PackURI(str):
+    """Proxy for a pack URI (partname).
+
+    Provides utility properties the baseURI and the filename slice. Behaves as |str| otherwise.
+    """
+
+    _filename_re = re.compile("([a-zA-Z]+)([0-9][0-9]*)?")
+
+    def __new__(cls, pack_uri_str: str):
+        if not pack_uri_str[0] == "/":
+            raise ValueError(f"PackURI must begin with slash, got {repr(pack_uri_str)}")
+        return str.__new__(cls, pack_uri_str)
+
+    @staticmethod
+    def from_rel_ref(baseURI: str, relative_ref: str) -> PackURI:
+        """Construct an absolute pack URI formed by translating `relative_ref` onto `baseURI`."""
+        joined_uri = posixpath.join(baseURI, relative_ref)
+        abs_uri = posixpath.abspath(joined_uri)
+        return PackURI(abs_uri)
+
+    @property
+    def baseURI(self) -> str:
+        """The base URI of this pack URI; the directory portion, roughly speaking.
+
+        E.g. `"/ppt/slides"` for `"/ppt/slides/slide1.xml"`.
+
+        For the package pseudo-partname "/", the baseURI is "/".
+        """
+        return posixpath.split(self)[0]
+
+    @property
+    def ext(self) -> str:
+        """The extension portion of this pack URI.
+
+        E.g. `"xml"` for `"/ppt/slides/slide1.xml"`. Note the leading period is not included.
+        """
+        # -- raw_ext is either empty string or starts with period, e.g. ".xml" --
+        raw_ext = posixpath.splitext(self)[1]
+        return raw_ext[1:] if raw_ext.startswith(".") else raw_ext
+
+    @property
+    def filename(self) -> str:
+        """The "filename" portion of this pack URI.
+
+        E.g. `"slide1.xml"` for `"/ppt/slides/slide1.xml"`.
+
+        For the package pseudo-partname "/", `filename` is ''.
+        """
+        return posixpath.split(self)[1]
+
+    @property
+    def idx(self) -> int | None:
+        """Optional int partname index.
+
+        Value is an integer for an "array" partname or None for singleton partname, e.g. `21` for
+        `"/ppt/slides/slide21.xml"` and |None| for `"/ppt/presentation.xml"`.
+        """
+        filename = self.filename
+        if not filename:
+            return None
+        name_part = posixpath.splitext(filename)[0]  # filename w/ext removed
+        match = self._filename_re.match(name_part)
+        if match is None:
+            return None
+        if match.group(2):
+            return int(match.group(2))
+        return None
+
+    @property
+    def membername(self) -> str:
+        """The pack URI with the leading slash stripped off.
+
+        This is the form used as the Zip file membername for the package item. Returns "" for the
+        package pseudo-partname "/".
+        """
+        return self[1:]
+
+    def relative_ref(self, baseURI: str) -> str:
+        """Return string containing relative reference to package item from `baseURI`.
+
+        E.g. PackURI("/ppt/slideLayouts/slideLayout1.xml") would return
+        "../slideLayouts/slideLayout1.xml" for baseURI "/ppt/slides".
+        """
+        # workaround for posixpath bug in 2.6, doesn't generate correct
+        # relative path when `start` (second) parameter is root ("/")
+        return self[1:] if baseURI == "/" else posixpath.relpath(self, baseURI)
+
+    @property
+    def rels_uri(self) -> PackURI:
+        """The pack URI of the .rels part corresponding to the current pack URI.
+
+        Only produces sensible output if the pack URI is a partname or the package pseudo-partname
+        "/".
+        """
+        rels_filename = "%s.rels" % self.filename
+        rels_uri_str = posixpath.join(self.baseURI, "_rels", rels_filename)
+        return PackURI(rels_uri_str)
+
+
+PACKAGE_URI = PackURI("/")
+CONTENT_TYPES_URI = PackURI("/[Content_Types].xml")