Attachment 15090 Details for Bug 33557 – Quick guide to using the PowerPoint code

Quick guide to using the PowerPoint code

ppt-intro.txt (text/plain), 1.45 KB, created by Nick Burch on 2005-05-20 17:27:00 UTC

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Creator: Nick Burch

Created: 2005-05-20 17:27:00 UTC

Size: 1.45 KB

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obsolete

>Basic Text Extraction
>---------------------
>
>For basic text extraction, make use of 
>org.apache.poi.extractor.PowerPointExtractor. It accepts a file or an input
>stream. The getText() method can be used to get the text from the slides,
>from the notes, or from both.
>
>
>Specific Text Extraction
>------------------------
>
>To get specific bits of text, first create a org.apache.poi.usermodel.SlideShow
>(from a org.apache.poi.HSLFSlideShow, which accepts a file or an input
>stream). Use getSlides() and getNotes() to get the slides and notes.
>These can be queried to get their page ID (though they should be returned
>in the right order). You can also call getTextRuns() on these, to get their
>blocks of text. From the TextRun, you can extract the text, and check
>what type of text it is (eg Body, Title)
>
>
>Changing Text
>-------------
>
>It is possible to change the text via TextRun.setText(String). However, if
>the length of the text is changed, things will break because PowerPoint has
>internal file references in byte offsets, which are not yet all updated when
>the size changes.
>
>
>Guide to key classes
>--------------------
>
>org.apache.poi.hslf.HSLFSlideShow
>  Handles reading in and writing out files. Generates a tree of the records
>  in the file
>org.apache.poi.hslf.usermode.SlideShow
>  Builds up model entries from the records, and presents a user facing
>  view of the file
>org.apache.poi.hslf.extractor.PowerPointExtractor
>  Uses the model code to allow extraction of text from files

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