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From Tharaka Nayanajith Wijebandara <tharaka...@gmail.com>
Subject Re: PDFBox Project for GSoC 2012
Date Sat, 31 Mar 2012 05:42:44 GMT
Hi,


Idea about object inspector is clear and I think I can make that dream into
reality. ;)


I have some doubt regarding RCP. Actually I didn't have any previous
experience with RPC and read some articles to get idea about it. As per my
understanding, although there are several RCPs in our case eclipse RCP is
most suitable one. However since RCP Application has several dependencies
and they are not in maven structure, I still can't understand how them
organize in pdfbox project. Is there any example project for understanding
it? Maybe I'm misunderstood, need some help from you to clear it.


Mehdi, I started to create proposal and I'll put it here within this
weekend.

On Thu, Mar 29, 2012 at 2:35 PM, mehdi houshmand <med1985@gmail.com> wrote:

> I think my hopes and dreams are pretty exactly the same as Jeremias'. These
> features would give PDFBox differentiation from Adobe products which focus
> much more design of PDF rather than nuts and bots debugging. As for the
> GUI, I'm really not fussy regarding the UI framework you use, but RCP does
> look pretty interesting...
>
> Just as an aside, in terms of structure, I was thinking of this being a
> maven sub-project in the same way fontbox and jempbox etc are. I just
> wanted to make sure we're all on the same wavelength here...
>
> Tharaka, I think you've probably got enough information here to create a
> proposal, if you want to put a draft up here for us (the community) to
> check over feel free to do so. But you're going to need to publish the
> proposal on Google melange (
> http://www.google-melange.com/gsoc/homepage/google/gsoc2012) so that I can
> agree to mentor it and rate the application.
>
> Just a bit of admin:
> Debian has a good template for student applications (
> http://wiki.debian.org/SummerOfCode/StudentApplicationTemplate). Once you
> fill out the necessary details I will assign myself as the mentor and have
> to rank your application (
> http://community.apache.org/mentee-ranking-process.html). If you want to
> fair better in the ranking process, involvement in the community is highly
> regarded by either a) answering user questions on the mailing list and/or
> b) going through PDFBox bugs and fixing some bugs; this isn't mandatory but
> will improve the ranking on your application.
>
> Mehdi
>
>
> On 29 March 2012 07:36, Jeremias Maerki <dev@jeremias-maerki.ch> wrote:
>
> > Hi Tharaka,
> >
> > Object Inspector: I'm not sure you need a tree for inspecting a single
> > object. The tree is useful when the PDF debugger is integrated as an
> > alternative view of a PDF. I'd expect to have a customized window (a
> > plug-in ;-) ) for each kind of object when inspecting it. A bitmap image
> > would display information about the size, the color space and profile,
> > effective resolution. Clicking on a word would display its font and
> > color. I guess it would be quite cool to have a button that says "jump
> > to object tree" so it would switch to the debugger view and focus on the
> > selected object. Imagine having viewer and debugger side-by-side in
> > separate views and the object that you click on in the debugger is
> > highlighted in the viewer. Wow. But I'm dreaming. ;-)
> >
> > Unfortunately, JPF is off-limits for PDFBox if it is used for core
> > functionality because it's under the LGPL license. Only optional
> > components/plug-ins may depend on LGPL libraries. But I think the normal
> > JAR Service Provider mechanism would already be good enough as a plug-in
> > framework:
> >
> >
> http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#Service%20Provider
> > We use that extensively over in Apache XML Graphics land. I would
> > suggest to base the GUI on Java 6 where you have the service lookup
> > built in:
> > http://docs.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html
> >
> > Swing with Nimbus generally sounds good to me.
> >
> > OTOH, an RCP application would actually offer the whole pluggability
> > (even at runtime) and an Eclipse-like workbench which would be great for
> > such an application. But it would also mean practically re-writing both
> > the PDF viewer (although the PDF painting via Java2D should still be
> > usable) and debugger functionality.
> >
> > Both Swing and RCP are non-trivial to learn. On the technical side I'd
> > probably favor RCP just a little bit, mostly because it's OSGi-based
> > (I'm biased there) even if the Eclipse world does ugly things to OSGi.
> > Furthermore, I know few good Swing applications but many good RCP
> > applications. Maybe that's an indicator. But I'd have to learn RCP
> > myself if I was to help out with this.
> >
> > Optional Content Groups (since PDF 1.5) are groups of objects (think
> > "layer") that can be enabled and disabled. I think that's advanced
> > functionality that the mainstream doesn't really need. But I'm also not
> > sure what Medhi means with transparency layers.
> >
> > On 29.03.2012 03:55:28 Tharaka Nayanajith Wijebandara wrote:
> > > Hi,
> > >
> > >
> > > Thanx mehdi, you have summarized all primary objective and we can
> > continue
> > > discussion based on it.
> > >
> > > For the GUI, I'm going to use Swing Framework and to modernize we can
> go
> > > for some available look and Feel such as nimbus. Is there any
> suggestion?
> > >
> > >
> > > I need some ideas about PDF object inspector and since it tool for
> > > developer all you can give some suggestions. In my opinion we can use
> > swing
> > > tree for this. User can right click on object and click ‘inspect’
> command
> > > in the menu, then it will show the object and it properties in the tree
> > and
> > > highlight object margin in the PDF view.
> > >
> > >
> > > Plugin frame is another feature to consider. We can use and adapt some
> > > available plugin frame for PDFReader rather than going for new our own
> > one.
> > > As per my understand Java Plug-in Framework (
> http://jpf.sourceforge.net/
> > )
> > > is good one we can use and it is XML based. Is there any apache
> framework
> > > for this? If I'm correct, maven project is based on plugin framework.
> > >
> > >
> > > Mehdi, I would like to add bookmark feature also in to primary
> objective
> > > list. It will allow user to view, add, edit and delete book marks. And
> > also
> > > I'm confused about what you mean by supporting optional content and
> > > transparency layers.
> > >
> > > On Mon, Mar 26, 2012 at 1:49 PM, mehdi houshmand <med1985@gmail.com>
> > wrote:
> > >
> > > > Hi Tharaka,
> > > >
> > > > Ok, well let's start with thinking about how this GUI is going to
> > look. In
> > > > its current form, it's looking a little dated, it might be worth
> using
> > some
> > > > of the GUI frameworks out there to spruce it up a little and making
> it
> > a
> > > > bit more modern. So if we get a list of TODOs (starting with
> Jeremias'
> > > > suggestions):
> > > >
> > > > - Investigate and design a proposal for upgrading the PDFReader GUI
> > (i.e.
> > > > modernizing it)
> > > > - Implement a PDF object inspector to display PDF object properties
> > when
> > > > objects are "clicked-on" in the viewer
> > > > - Implement a type-writer feature to add/remove text from a content
> > stream
> > > > from within the PDFViewer
> > > > - Design a plugin framework for the viewer
> > > >
> > > > Maybe those are a good list of primary objectives? We should think
> > about
> > > > some secondary objectives, like possibly supporting Optional Content
> > in the
> > > > view (not sure if it already is) and better handling of transparency
> > > > layers?
> > > >
> > > > Just some thoughts, let's keep this discussions fluid for now, we
> > haven't
> > > > actually got that long before we have to submit a proposal though.
> > > >
> > > > Mehdi
> > > >
> > > > On 22 March 2012 03:04, Tharaka Nayanajith Wijebandara <
> > > > tharaka.nw@gmail.com
> > > > > wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > >
> > > > > Thanks everyone for your valuable ideas and comments.
> > > > >
> > > > >
> > > > > It seems most of you like to enhancing PDFReader project.
> Specially I
> > > > > prefer Jeremias' idea, develop application which allow user to
> access
> > > > > PDFBox features through the GUI and PDF viewer with integrated PDF
> > > > > Debugger. In my opinion it will be very much useful tool for users
> as
> > > > well
> > > > > as developers rather than just another PDF reader. So I would like
> to
> > > > > continue with this project. However, since there are several ways
> to
> > > > > enhance PDFReader, we have to define the scope of the project
> > according
> > > > to
> > > > > priority in next few days.
> > > > >
> > > > >
> > > > > Additionally I want to mention another thing here. As my experience
> > > > current
> > > > > PDFReader is also not very much reliable and not working smoothly.
> I
> > > > still
> > > > > can't understand that whether it is problem of code of PDFReader
or
> > > > PDFBox
> > > > > core. Anyway I think that it's better if we can consider also this
> > in the
> > > > > project, if it's not some issue in PDFBox core.
> > > > >
> > > > > On Wed, Mar 21, 2012 at 10:26 PM, mehdi houshmand <
> med1985@gmail.com
> > >
> > > > > wrote:
> > > > >
> > > > > > Hi Tharaka,
> > > > > >
> > > > > > You have plenty of options here, the student application deadline
> > is on
> > > > > the
> > > > > > 6th April (see the calendar
> > > > > > http://www.google-melange.com/gsoc/events/google/gsoc2012),
so
> > you've
> > > > > got
> > > > > > plenty of time.
> > > > > >
> > > > > > Let me and/or the community know if you have any questions about
> > the
> > > > > > projects. If you have an idea of which project you'd prefer,
> maybe
> > we
> > > > can
> > > > > > start drawing up some goals and a schedule and discuss with
the
> > > > community
> > > > > > to get some feedback on which facets are a) interesting b) useful
> > or c)
> > > > > > both!
> > > > > >
> > > > > > Mehdi
> > > > > >
> > > > > > On 20 March 2012 15:58, Jeremias Maerki <dev@jeremias-maerki.ch>
> > > > wrote:
> > > > > >
> > > > > > > There are a number of HTML to XSL-FO converters. I've never
> > checked
> > > > how
> > > > > > > good the results are but ultimately a native HTML engine
is
> > likely to
> > > > > > > produce better results especially since HTML was not really
> > designed
> > > > > for
> > > > > > > print and has to be retrofitted in CSS3. But again, this
is a
> > large
> > > > > > > project and, IMO, out of scope for PDFBox.
> > > > > > >
> > > > > > > http://html2fo.sourceforge.net/
> > > > > > > http://denature.sourceforge.net/
> > > > > > > ...and probably others...
> > > > > > >
> > > > > > > On 20.03.2012 13:02:33 Dexter Mishra wrote:
> > > > > > > > I vote for a PDS editor kind of stuff.
> > > > > > > > Another thing regarding the HTML to PDS, cant it be
done with
> > > > XSL-FO
> > > > > > > > feature?
> > > > > > > > Thanks
> > > > > > > >
> > > > > > > > On Tue, Mar 20, 2012 at 3:03 PM, Maruan Sahyoun <
> > > > > > sahyoun@fileaffairs.de
> > > > > > > >wrote:
> > > > > > > >
> > > > > > > > >
> > > > > > > > > > <snip/>
> > > > > > > > > >
> > > > > > > > > >>
> > > > > > > > > >> Although I think that the current PDF
Reader can be
> > enhanced
> > > > in
> > > > > > many
> > > > > > > > > ways
> > > > > > > > > >> there are already so many Readers out
there as well as
> PDF
> > > > > support
> > > > > > > > > within
> > > > > > > > > >> web browsers my personal opinion is
that enhancing
> PDFBox
> > core
> > > > > > > > > capabilities
> > > > > > > > > >> would be more beneficial.
> > > > > > > > > >>
> > > > > > > > > >> With kind regards
> > > > > > > > > >>
> > > > > > > > > >> Maruan Sahyoun
> > > > > > > > > >>
> > > > > > > > > >>
> > > > > > > > > > Check out Jeremias' suggestions of the viewer,
it's less
> > of a
> > > > > > viewer
> > > > > > > and
> > > > > > > > > > more of a front-end for a lot of the tools
PDFBox has to
> > > > offer, a
> > > > > > > PDFBox
> > > > > > > > > > GUI so to speak rather than a PDF viewer.
> > > > > > > > >
> > > > > > > > > I'd still look into enhancing PDFBox core as
this will
> > benefit
> > > > most
> > > > > > > users.
> > > > > > > > > Looking at the bugs and issues most come from
core
> > capabilities.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Jeremias Maerki
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Thanks & Regards,
> > > > > Tharaka Wijebandara,
> > > > > Faculty of Information Technology,
> > > > > University of Moratuwa.
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Thanks & Regards,
> > > Tharaka Wijebandara,
> > > Faculty of Information Technology,
> > > University of Moratuwa.
> >
> >
> >
> >
> > Jeremias Maerki
> >
> >
>



-- 
Thanks & Regards,
Tharaka Wijebandara,
Faculty of Information Technology,
University of Moratuwa.

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