From 434fb32dc10fd3eddcdcb0cf4e08625c9aa7cb4e Mon Sep 17 00:00:00 2001
From: SuperUser <michael.heerkens@helloprint.com>
Date: Mon, 2 Mar 2026 09:42:04 +0000
Subject: [PATCH] Add pptx add_slide

---
 pptx/scripts/add_slide.py | 195 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 pptx/scripts/add_slide.py

diff --git a/pptx/scripts/add_slide.py b/pptx/scripts/add_slide.py
new file mode 100644
index 0000000..26e722f
--- /dev/null
+++ b/pptx/scripts/add_slide.py
@@ -0,0 +1,195 @@
+"""Add a new slide to an unpacked PPTX directory.
+
+Usage: python add_slide.py <unpacked_dir> <source>
+
+The source can be:
+  - A slide file (e.g., slide2.xml) - duplicates the slide
+  - A layout file (e.g., slideLayout2.xml) - creates from layout
+
+Examples:
+    python add_slide.py unpacked/ slide2.xml
+    # Duplicates slide2, creates slide5.xml
+
+    python add_slide.py unpacked/ slideLayout2.xml
+    # Creates slide5.xml from slideLayout2.xml
+
+To see available layouts: ls unpacked/ppt/slideLayouts/
+
+Prints the <p:sldId> element to add to presentation.xml.
+"""
+
+import re
+import shutil
+import sys
+from pathlib import Path
+
+
+def get_next_slide_number(slides_dir: Path) -> int:
+    existing = [int(m.group(1)) for f in slides_dir.glob("slide*.xml")
+                if (m := re.match(r"slide(\d+)\.xml", f.name))]
+    return max(existing) + 1 if existing else 1
+
+
+def create_slide_from_layout(unpacked_dir: Path, layout_file: str) -> None:
+    slides_dir = unpacked_dir / "ppt" / "slides"
+    rels_dir = slides_dir / "_rels"
+    layouts_dir = unpacked_dir / "ppt" / "slideLayouts"
+
+    layout_path = layouts_dir / layout_file
+    if not layout_path.exists():
+        print(f"Error: {layout_path} not found", file=sys.stderr)
+        sys.exit(1)
+
+    next_num = get_next_slide_number(slides_dir)
+    dest = f"slide{next_num}.xml"
+    dest_slide = slides_dir / dest
+    dest_rels = rels_dir / f"{dest}.rels"
+
+    slide_xml = '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main">
+  <p:cSld>
+    <p:spTree>
+      <p:nvGrpSpPr>
+        <p:cNvPr id="1" name=""/>
+        <p:cNvGrpSpPr/>
+        <p:nvPr/>
+      </p:nvGrpSpPr>
+      <p:grpSpPr>
+        <a:xfrm>
+          <a:off x="0" y="0"/>
+          <a:ext cx="0" cy="0"/>
+          <a:chOff x="0" y="0"/>
+          <a:chExt cx="0" cy="0"/>
+        </a:xfrm>
+      </p:grpSpPr>
+    </p:spTree>
+  </p:cSld>
+  <p:clrMapOvr>
+    <a:masterClrMapping/>
+  </p:clrMapOvr>
+</p:sld>'''
+    dest_slide.write_text(slide_xml, encoding="utf-8")
+
+    rels_dir.mkdir(exist_ok=True)
+    rels_xml = f'''<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
+  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout" Target="../slideLayouts/{layout_file}"/>
+</Relationships>'''
+    dest_rels.write_text(rels_xml, encoding="utf-8")
+
+    _add_to_content_types(unpacked_dir, dest)
+
+    rid = _add_to_presentation_rels(unpacked_dir, dest)
+
+    next_slide_id = _get_next_slide_id(unpacked_dir)
+
+    print(f"Created {dest} from {layout_file}")
+    print(f'Add to presentation.xml <p:sldIdLst>: <p:sldId id="{next_slide_id}" r:id="{rid}"/>')
+
+
+def duplicate_slide(unpacked_dir: Path, source: str) -> None:
+    slides_dir = unpacked_dir / "ppt" / "slides"
+    rels_dir = slides_dir / "_rels"
+
+    source_slide = slides_dir / source
+
+    if not source_slide.exists():
+        print(f"Error: {source_slide} not found", file=sys.stderr)
+        sys.exit(1)
+
+    next_num = get_next_slide_number(slides_dir)
+    dest = f"slide{next_num}.xml"
+    dest_slide = slides_dir / dest
+
+    source_rels = rels_dir / f"{source}.rels"
+    dest_rels = rels_dir / f"{dest}.rels"
+
+    shutil.copy2(source_slide, dest_slide)
+
+    if source_rels.exists():
+        shutil.copy2(source_rels, dest_rels)
+
+        rels_content = dest_rels.read_text(encoding="utf-8")
+        rels_content = re.sub(
+            r'\s*<Relationship[^>]*Type="[^"]*notesSlide"[^>]*/>\s*',
+            "\n",
+            rels_content,
+        )
+        dest_rels.write_text(rels_content, encoding="utf-8")
+
+    _add_to_content_types(unpacked_dir, dest)
+
+    rid = _add_to_presentation_rels(unpacked_dir, dest)
+
+    next_slide_id = _get_next_slide_id(unpacked_dir)
+
+    print(f"Created {dest} from {source}")
+    print(f'Add to presentation.xml <p:sldIdLst>: <p:sldId id="{next_slide_id}" r:id="{rid}"/>')
+
+
+def _add_to_content_types(unpacked_dir: Path, dest: str) -> None:
+    content_types_path = unpacked_dir / "[Content_Types].xml"
+    content_types = content_types_path.read_text(encoding="utf-8")
+
+    new_override = f'<Override PartName="/ppt/slides/{dest}" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>'
+
+    if f"/ppt/slides/{dest}" not in content_types:
+        content_types = content_types.replace("</Types>", f"  {new_override}\n</Types>")
+        content_types_path.write_text(content_types, encoding="utf-8")
+
+
+def _add_to_presentation_rels(unpacked_dir: Path, dest: str) -> str:
+    pres_rels_path = unpacked_dir / "ppt" / "_rels" / "presentation.xml.rels"
+    pres_rels = pres_rels_path.read_text(encoding="utf-8")
+
+    rids = [int(m) for m in re.findall(r'Id="rId(\d+)"', pres_rels)]
+    next_rid = max(rids) + 1 if rids else 1
+    rid = f"rId{next_rid}"
+
+    new_rel = f'<Relationship Id="{rid}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/{dest}"/>'
+
+    if f"slides/{dest}" not in pres_rels:
+        pres_rels = pres_rels.replace("</Relationships>", f"  {new_rel}\n</Relationships>")
+        pres_rels_path.write_text(pres_rels, encoding="utf-8")
+
+    return rid
+
+
+def _get_next_slide_id(unpacked_dir: Path) -> int:
+    pres_path = unpacked_dir / "ppt" / "presentation.xml"
+    pres_content = pres_path.read_text(encoding="utf-8")
+    slide_ids = [int(m) for m in re.findall(r'<p:sldId[^>]*id="(\d+)"', pres_content)]
+    return max(slide_ids) + 1 if slide_ids else 256
+
+
+def parse_source(source: str) -> tuple[str, str | None]:
+    if source.startswith("slideLayout") and source.endswith(".xml"):
+        return ("layout", source)
+
+    return ("slide", None)
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: python add_slide.py <unpacked_dir> <source>", file=sys.stderr)
+        print("", file=sys.stderr)
+        print("Source can be:", file=sys.stderr)
+        print("  slide2.xml        - duplicate an existing slide", file=sys.stderr)
+        print("  slideLayout2.xml  - create from a layout template", file=sys.stderr)
+        print("", file=sys.stderr)
+        print("To see available layouts: ls <unpacked_dir>/ppt/slideLayouts/", file=sys.stderr)
+        sys.exit(1)
+
+    unpacked_dir = Path(sys.argv[1])
+    source = sys.argv[2]
+
+    if not unpacked_dir.exists():
+        print(f"Error: {unpacked_dir} not found", file=sys.stderr)
+        sys.exit(1)
+
+    source_type, layout_file = parse_source(source)
+
+    if source_type == "layout" and layout_file is not None:
+        create_slide_from_layout(unpacked_dir, layout_file)
+    else:
+        duplicate_slide(unpacked_dir, source)
\ No newline at end of file