https://bugs.kde.org/show_bug.cgi?id=384972

            Bug ID: 384972
           Summary: No change of preview on format change of content (e.g.
                    plain text -> Markdown)
           Product: kate
           Version: Git
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: plugin-preview
          Assignee: kwrite-bugs-n...@kde.org
          Reporter: kosse...@kde.org
                CC: kosse...@kde.org
        Depends on: 384448, 384449
  Target Milestone: ---

When editing a document and changing the format (like turning plain text into
Markdown formatted one), the preview does not update. Even not when saving to a
new file with a new file suffix.

Reason is that the plugin relies on the MIME type reported for the document.
Right now KTextEditor only estimates that MIME type on request instead of
maintaining this property itself and notifying clients about any changes (see
bugs this report depends on).

Workaround:
Best ensure the changed document is saved at least once (for MIME types only
detected by file suffix). Then either close & open again the file or switch the
preview plugin shortly to preview another open document.


Referenced Bugs:

https://bugs.kde.org/show_bug.cgi?id=384448
[Bug 384448] No KTextEditor::Document::mimeTypeChanged signal available
https://bugs.kde.org/show_bug.cgi?id=384449
[Bug 384449] New documents (without storage url) have mimetype guessed without
respecting selected mode/highlighting
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