From 6592dfb0821b5674df2851ab031ed6eaca7d4c8f Mon Sep 17 00:00:00 2001
From: Tuong Nguyen Manh <tuongnm88@gmail.com>
Date: Sun, 30 Nov 2025 13:17:34 +0100
Subject: pptx writer: Handle reference doc without slides (#11310)

An empty `sldIdLst` is now added if the reference doc is missing one so that
`modifySldIdLst` can replace it. To ensure PowerPoint doesn't say that the file
will need fixing, the `sldIdLst` has to be placed after the `sldMasterIdLst`.
I also added a test to ensure that if there are notes, they will be placed between
the `sldMasterIdLst` and `sldIdLst`. Otherwise PowerPoint wouldn't show the
slide of a note when viewing Notes Pages.

Closes #7536.
---
 test/Tests/Writers/Powerpoint.hs                   |  12 ++++
 test/pptx/reference-no-slides.pptx                 | Bin 0 -> 30988 bytes
 .../reference-no-slides/add-slides/input.native    |  14 +++++
 .../reference-no-slides/add-slides/output.pptx     | Bin 0 -> 28888 bytes
 .../reference-no-slides/with-notes/input.native    |  70 +++++++++++++++++++++
 .../reference-no-slides/with-notes/output.pptx     | Bin 0 -> 33927 bytes
 6 files changed, 96 insertions(+)
 create mode 100644 test/pptx/reference-no-slides.pptx
 create mode 100644 test/pptx/reference-no-slides/add-slides/input.native
 create mode 100644 test/pptx/reference-no-slides/add-slides/output.pptx
 create mode 100644 test/pptx/reference-no-slides/with-notes/input.native
 create mode 100644 test/pptx/reference-no-slides/with-notes/output.pptx

(limited to 'test')

diff --git a/test/Tests/Writers/Powerpoint.hs b/test/Tests/Writers/Powerpoint.hs
index ab8b49314..35269205b 100644
--- a/test/Tests/Writers/Powerpoint.hs
+++ b/test/Tests/Writers/Powerpoint.hs
@@ -276,5 +276,17 @@ tests = let
       def {writerReferenceDoc = Just "pptx/reference-deleted-layouts.pptx"}
       "pptx/layouts/input.native"
       "pptx/layouts/deleted.pptx"
+    , ooxmlTest
+      writePowerpoint
+      "Slides can be missing from the reference doc"
+      def {writerReferenceDoc = Just "pptx/reference-no-slides.pptx"}
+      "pptx/reference-no-slides/add-slides/input.native"
+      "pptx/reference-no-slides/add-slides/output.pptx"
+    , ooxmlTest
+      writePowerpoint
+      "Notes are placed at the right position with a reference doc without slides"
+      def {writerReferenceDoc = Just "pptx/reference-no-slides.pptx"}
+      "pptx/reference-no-slides/with-notes/input.native"
+      "pptx/reference-no-slides/with-notes/output.pptx"
     ]
   in regularTests <> referenceSpecificTests
diff --git a/test/pptx/reference-no-slides.pptx b/test/pptx/reference-no-slides.pptx
new file mode 100644
index 000000000..2c4d77184
Binary files /dev/null and b/test/pptx/reference-no-slides.pptx differ
diff --git a/test/pptx/reference-no-slides/add-slides/input.native b/test/pptx/reference-no-slides/add-slides/input.native
new file mode 100644
index 000000000..de1250533
--- /dev/null
+++ b/test/pptx/reference-no-slides/add-slides/input.native
@@ -0,0 +1,14 @@
+[ Header
+    2
+    ( "first-slide" , [] , [] )
+    [ Str "First" , Space , Str "Slide" ]
+, Para [ Str "Title" ]
+, Header
+    2
+    ( "second-slide" , [] , [] )
+    [ Str "Second" , Space , Str "Slide" ]
+, BulletList
+    [ [ Plain [ Str "First" , Space , Str "item" ] ]
+    , [ Plain [ Str "Second" , Space , Str "item" ] ]
+    ]
+]
diff --git a/test/pptx/reference-no-slides/add-slides/output.pptx b/test/pptx/reference-no-slides/add-slides/output.pptx
new file mode 100644
index 000000000..35c0c5869
Binary files /dev/null and b/test/pptx/reference-no-slides/add-slides/output.pptx differ
diff --git a/test/pptx/reference-no-slides/with-notes/input.native b/test/pptx/reference-no-slides/with-notes/input.native
new file mode 100644
index 000000000..f671a2b0b
--- /dev/null
+++ b/test/pptx/reference-no-slides/with-notes/input.native
@@ -0,0 +1,70 @@
+[ Header
+    2
+    ( "first-slide" , [] , [] )
+    [ Str "First" , Space , Str "Slide" ]
+, Para
+    [ Str "First"
+    , Space
+    , Str "slide"
+    , Space
+    , Str "with"
+    , Space
+    , Str "notes"
+    ]
+, Div
+    ( "" , [ "notes" ] , [] )
+    [ Para
+        [ Str "Notes"
+        , Space
+        , Str "for"
+        , Space
+        , Str "the"
+        , Space
+        , Str "first"
+        , Space
+        , Str "slide"
+        ]
+    ]
+, Header
+    2
+    ( "second-slide" , [] , [] )
+    [ Str "Second" , Space , Str "Slide" ]
+, Para
+    [ Str "Slide"
+    , Space
+    , Str "without"
+    , Space
+    , Str "notes"
+    ]
+, Header
+    2
+    ( "third-slide" , [] , [] )
+    [ Str "Third" , Space , Str "Slide" ]
+, Para
+    [ Str "Slide"
+    , Space
+    , Str "with"
+    , Space
+    , Str "notes"
+    , Space
+    , Str "again"
+    ]
+, BulletList
+    [ [ Plain [ Str "First" , Space , Str "item" ] ]
+    , [ Plain [ Str "Second" , Space , Str "item" ] ]
+    ]
+, Div
+    ( "" , [ "notes" ] , [] )
+    [ Para
+        [ Str "Notes"
+        , Space
+        , Str "for"
+        , Space
+        , Str "the"
+        , Space
+        , Str "third"
+        , Space
+        , Str "slides"
+        ]
+    ]
+]
diff --git a/test/pptx/reference-no-slides/with-notes/output.pptx b/test/pptx/reference-no-slides/with-notes/output.pptx
new file mode 100644
index 000000000..448d866bf
Binary files /dev/null and b/test/pptx/reference-no-slides/with-notes/output.pptx differ
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