The OpenOffice recorder and UNO dispatch calls

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Apache OpenOffice provides a recorder, in Writer and Calc only, to record a series of actions, to produce some code. The recorder produces a series of UNO dispatch calls, which are not particularly useful for learning the Apache OpenOffice API model. I personally find the code that the recorder produces to be a little hard to follow. It is generally considered preferable to use Apache OpenOffice API calls but sometimes the only way or most convenient way is to use UNO dispatch calls.

The dispatch commands are an internal mechanism of Apache OpenOffice. The arguments of each dispatch command are not documented.

This Framework article is the latest command list available.

Below are three versions of the same macro:

  • Recorded example
  • Tidied UNO dispatch calls
  • API Calls

The series of steps recorded were:

Type "Some text" ; Press Enter; Type "A new paragraph with a "; Format > Character… > Bold > OK; Type "bold"; Format > Character… > Regular> OK; Type " word in it".

Documentation note.png This would be best handled with autotext, but this simple example demonstrates the point.

Recorded example

    sub Example
    rem ----------------------------------------------------------------------
    rem define variables
    dim document   as object
    dim dispatcher as object
    rem ----------------------------------------------------------------------
    rem get access to the document
    document   = ThisComponent.CurrentController.Frame
    dispatcher = createUnoService("")
    rem ----------------------------------------------------------------------
    dim args1(0) as new
    args1(0).Name = "Text"
    args1(0).Value = "Some text"
    dispatcher.executeDispatch(document, ".uno:InsertText", "", 0, args1())
    rem ----------------------------------------------------------------------
    dispatcher.executeDispatch(document, ".uno:InsertPara", "", 0, Array())
    rem ----------------------------------------------------------------------
    dim args3(0) as new
    args3(0).Name = "Text"
    args3(0).Value = "A new paragraph with a "
    dispatcher.executeDispatch(document, ".uno:InsertText", "", 0, args3())
    rem ----------------------------------------------------------------------
    dim args4(0) as new
    args4(0).Name = "Bold"
    args4(0).Value = true
    dispatcher.executeDispatch(document, ".uno:Bold", "", 0, args4())
    rem ----------------------------------------------------------------------
    dim args5(0) as new
    args5(0).Name = "Text"
    args5(0).Value = "bold"
    dispatcher.executeDispatch(document, ".uno:InsertText", "", 0, args5())
    rem ----------------------------------------------------------------------
    dim args6(0) as new
    args6(0).Name = "Bold"
    args6(0).Value = false
    dispatcher.executeDispatch(document, ".uno:Bold", "", 0, args6())
    rem ----------------------------------------------------------------------
    dim args7(0) as new
    args7(0).Name = "Text"
    args7(0).Value = " word in it."
    dispatcher.executeDispatch(document, ".uno:InsertText", "", 0, args7())
    end sub

Tidied UNO dispatch calls

(This heading is linked to from UNO Dispatch, so if you change it change the link as well.)

Now the same example having been tidied using a function for calling the UNO dispatch calls (some UNO Dispatch calls return a value so using a function makes it more generically useful than a sub):

    sub Example
        fnDispatch("InsertText", array("Text","Some text"))
        fnDispatch("InsertText", array("Text","A new paragraph with a "))
        fnDispatch("Bold", array("Bold",true))
        fnDispatch("InsertText", array("Text","bold"))
        fnDispatch("Bold", array("Bold",false))
        fnDispatch("InsertText", array("Text"," word in it."))
    end sub
    function fnDispatch(sCommand as string, optional mArgs)
        oFrame = ThisComponent.getCurrentController.getFrame
        oDispatcher = createUnoService("")
        'on error resume next
        if isMissing(mArgs) then
            fnDispatch = oDispatcher.executeDispatch(oFrame, ".uno:" & sCommand, "", 0, array())
            nArgs = uBound(mArgs) \ 2
            dim Args(nArgs) as new
            for i = 0 to nArgs
                Args(i).name = mArgs(i * 2)
                Args(i).value = mArgs(i * 2 + 1)
            fnDispatch = oDispatcher.executeDispatch(oFrame, ".uno:" & sCommand, "", 0, Args())
        end if
    end function

API calls

Finally, the same example using API calls:

    sub Example
        oVC = thisComponent.getCurrentController.getViewCursor
        oText = oVC.text
        oText.insertString(oVC, "Some text", False)
        oText.insertControlCharacter(oVC,, False)
        oText.insertString(oVC, "A new paragraph with a ", False)
        oText.insertString(oVC, "bold", false)
        oText.insertString(oVC, " word in it.", false)
    end sub
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