https://bugs.documentfoundation.org/show_bug.cgi?id=168371

            Bug ID: 168371
           Summary: Text preview in "Character" window ignores ligatures
                    when showing a change in character spacing
           Product: LibreOffice
           Version: 25.8.1.1 release
          Hardware: All
                OS: macOS (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: LibreOffice
          Assignee: [email protected]
          Reporter: [email protected]

Description:
This is a bug I've noticed in LibreOffice Impress, running on a Mac. It seems
to show up in LibreOffice Draw as well.

If you select a text which includes automatically added ligature characters
(e.g. "fi"), open the Character window, and try to change the character
spacing, the preview at the bottom of the window will display the spacing
changing between all characters - including those comprising the ligature.
However, this is misleading. Once you click OK, the newly changed text will be
different from what the preview showed: the ligature will stay unchanged.

To be clear, this is not a complaint about ligatures themselves being
unaffected by spacing (I know that turning off ligatures in the font avoids
that). The issue is that the preview gives a false impression of what will
happen.

Steps to Reproduce:
1. Run LibreOfficeImpress.
2. Create a new text box, type in a text which includes the letters "fi".
3. Select the text and change its font to Helvetica, DejaVu Sans, or another
font which includes ligatures such as "fi".
4. Choose Format -> Character.
5. Go to the "Position" tab and increase "Character spacing" to 3-4 points. The
preview at the bottom of the window will show the spacing between _all_ the
characters increasing.
6. Click OK.

Actual Results:
In the document, the spacing will have increased only between characters other
than 'fi'. This is different from what the preview window showed.

Expected Results:
The preview window should have shown that changing the Text Spacing option does
not change the spacing within the ligature.


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 4; OS: macOS 13.7.6; UI render: Skia/Raster; VCL: osx
Locale: ja-JP (en.UTF-8); UI: en-US
Calc: threaded

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