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From ZuoJun Chen <zjchen...@gmail.com>
Subject Re: Question about text clipping mechanism in word processor
Date Wed, 20 Jun 2012 11:43:15 GMT
Hi, Fan

 I have extracted parameter from first paragraph in sample file

1 Spacing before paragraph 18pt in doc file
2 above-paragraph-spacing  in SvxULSpaceItem: 360
3 line-spacing of said para in doc file: 12pt
4 line-spacing of said para in SvxLineSpacingItem:240

Seems that the value mapping works, Looking forward to your further
response:)

2012/6/20 Fan Zheng <zheng.easyfan@gmail.com>

> Hi ZJ:
>
> Sorry, perhaps I missed something. Would you please give me following data
> of this specified sample file?
>
> 1. The exact value of the above-paragraph-spacing of said para, recorded in
> the DOC file;
> 2. The exact value of the above-paragraph-spacing of said para, recorded in
> SvxULSpaceItem, when trying to format it;
> 3. The exact value of the line-spacing of said para, recorded in the DOC
> file;
> 4. The exact value of the line-spacing of said para, recorded in
> SvxLineSpacingItem, when trying to format it;
>
> By comparing the above values, we may confirm that, this is a value mapping
> issue or, a strategy difference issue.
>
> 2012/6/20 Oliver-Rainer Wittmann <orwittmann@googlemail.com>
>
> > Hi,
> >
> >
> > On 20.06.2012 10:47, ZuoJun Chen wrote:
> >
> >> Hi All,
> >>
> >>        I'm trying to handle a bug on text clipped in document . See Bug
> >> 119476<https://issues.apache.**org/ooo/show_bug.cgi?id=119476<
> https://issues.apache.org/ooo/show_bug.cgi?id=119476>
> >> **>   for more
> >> details.
> >>
> >> After investigation, I have some insights. When paragraph line spacing
> is
> >> smaller than font size,
> >>
> >> the text contained becomes too large for fit, then AOO will clipped text
> >> as Incomplete part. The code
> >>
> >>  for text clipped mechanism can be located in method
> >> <SwTxtFormatter::**CalcRealHeight(..)>  at
> >>
> >> sw\source\core\text\itrform2.**cxx line 1756.
> >>
> >>
> >> I thought that the preferable way to fix this would be to considering
> the
> >> spacing contains above paragraph
> >>
> >> spacing property and line spacing property as the conditions to
> determine
> >> whether clipping text. e.g.
> >>
> >> Clipped text if the sum of  adding above paragraph spacing  and line
> >> paragraph spacing  is smaller than font size,
> >>
> >> otherwise do not clip text since above paragraph spacing and line
> spacing
> >> are enough to display the text.
> >>
> >>
> > From my point of view this change makes sense.
> > If the text of the first line of a paragraph "founds" enough space in the
> > "above paragraph spacing", the text should not be clipped.
> >
> > I had already looked at the patch and it looks ok.
> > I will have a deeper look regarding how to determine the value of "above
> > paragraph spacing". As far as I remember in some cases depending on
> certain
> > compatibility option, the "above paragraph spacing" is not applied. E.g.,
> > if the paragraph is the first on a page and compatibility option "Add
> > paragraph and table spacing at tops of pages ..." is not checked, the
> > "above paragraph spacing" is not applied.
> > May be I find a solution to access the already calculated and applied
> > "above paragraph spacing".
> >
> >
> >
> >> Noticed that there is a property named  below paragraph spacing, but I'm
> >> not sure whether there is a need to consider this one,
> >>
> >> Do this property impact text clipped in paragraph?
> >>
> >>
> > May be - I am not sure.
> > Thus, a paragraph could have a "below paragraph spacing" and the first
> > text line of the following paragraph could be to small. This would cause
> > clipping, but may be the "below paragraph spacing" from the previous
> > paragraph could be used to avoid the clipping.
> > From my point of view avoid the clipping in this case would also make
> > sense.
> > May be my above mentioned further investigation regarding the available
> > space above the first text line of a paragraph would solve this, too.
> >
> > Zuojun, do you know how MS Word will behave in this case?
> >
> >
> > Best regards, Oliver.
> >
>

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