Delete unused styles

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    The macro presented here is intended to show how to remove unused custom styles from a document.

    The macro starts by accessing the "style families". Depending on the type of document these can be CharacterStyles, ParagraphStyles, FrameStyles, PageStyles, NumberingStyles, CellStyles, ShapeStyles.[1]

    The code below searches through the cell styles of a Calc sheet, in which the CellStyles collection is looped through. For each element, the methods isUserDefined and isInUse are used to test if it is a custom style used or not.[2]

    The only particularity is that we browse the collection "backwards" from n to zero to avoid problems (since we delete elements from the browsed collection).


    In LibreOffice Basic:

    Option Explicit
    Sub delete_unused_styles ()
        Dim oStylesF    As Object
        Dim oStyles     As Object
        Dim oStyle      As Object
        Dim i           As Integer
        oStylesF = ThisComponent.getStyleFamilies
        If oStylesF.hasByName("CellStyles") Then
            oStyles = oStylesF.getByName("CellStyles")
            For i = UBound(oStyles.ElementNames) To 0 Step -1
                oStyle = oStyles.getByName(oStyles.ElementNames(i))
                If oStyle.isUserDefined And Not(oStyle.isInUse) Then
                    oStyle = Nothing
                End If
            Next i
            MsgBox "Done!"
            MsgBox "No user-defined style families found..."
        End If
    End Sub ' delete_unused_styles