[pedevel] Printing
- From: "François Revol" <revol@xxxxxxx>
- To: pedevel@xxxxxxxxxxxxx
- Date: Wed, 09 Apr 2008 16:27:41 +0200 CEST
Hi there.
I started adding printing to Pe.
While it's not really needed in most cases it can still be handy to
have correctly printed code. Also, one thing I had in mind was to be
able to generate a nicely indexed PDF file from source code, using the
function list as bookmarks.
Currently the PDF Writer driver generates bookmarks based on font face
and size matching on the text sent to it. while it might be working for
word processing documents it's no use for us since we use a single
font, and doesn't give enough control.
I plan on extending the driver to accept a list of bookmarks instead.
I started adding code to generate it in Pe, but it will need some more
work to calculate the pages from the line number, but since we need to
first iterate over all pages to count them before starting printing it
should still be possible to have the bookmarks available at the time we
last call SetSettings() with the settings message, and use it to pass
them around.
I also fiddled with other meta-data (author, keywords..), but the
current driver in zeta doesn't accept what I pass to it (though it puts
its own back at the same place. It seems our driver should be saner
there, need to test.
Anyway the first thing to do should still be printing correctly.
The code in svn works but the result doesn't look good at all.
I fixed some things but I'm not happy with it and I don't know enough
of the drawing internals to avoid messing things up, and it's not yet
working.
Plus I noticed missing redraws I didn't see before, so I probably
already screwed it up.
The patch here is what I did so far:
http://revolf.free.fr/beos/patches/pe_printing_wip.001.diff.txt
* factored out the split drawing in Draw(), but it doesn't look much
better.
* Use different values when printing (disregard splitting). I think
maybe that code should be moved to a DrawSplit() or something.
* Used black and white instead of the default bg/fg colors when
printing. This doesn't work fully, it seems the first page is
parasitized with calls to RedrawDirtyLines or some other code, as
(under Zeta where the document bg is not set to white) it still draws
brawn lines in the text:
http://revolf.free.fr/beos/test_pe.pdf
Still, a lot of things should not be accounted for when printing.
Wrapping should be used to avoid cutting text. There should also be
some scalling probably, maybe via a preference panel...
Selection bg color is still printed too. Invisibles should stay
invisible probably...
Either those values should be forced before printing and restored
afterward (it's done synchronously anyway), or a different code path
should be taken from Draw(), maybe DrawPrinting().
Comments ?
François.
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