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Posted to dev@openmeetings.apache.org by Dmitry Zamula <cl...@gmail.com> on 2012/03/30 13:50:46 UTC
[GSoC 2012] Question about OpenOffice in Openmeetings
Hello!
My name is Dmitry, I'm on my fifth year of information technologies at the
National Research University of Information Technologies, Mechanics and
Optics of St. Petersburg, Russia. I would like to participate in GSoC 2012.
I am familiar with Java and surrounding technology (Spring, EJB, Hibernate
etc.). I have one year experience in commercial developments.
I want to ask you for some clarifications, about one of proposed ideas:
"performance: maybe we can set up dedicated OpenOffice service, so we
won't need to have one for each openmeetings installation; in this
case we can monitor document conversion errors and stream them to
Apache OpenOffice project;
another approach to document handling is replacing OpenOffice with
Zimbra, or Google Wave (which is Apache Wave), or Yegor's library; most of
them have problems with Excel though"
Before submitting the application, I would like to clarify, whether the
task is relevant today? Is it possible to use it as a summer project in
GSoC? Do you need any proof of my competence in programming (like test
task)?
I would like to ask a question about the task - As far as I understand
whiteboard displays a static image of the document without the possibility
of editing. Openmeeting uses JDOConverter to convert formats. But I do not
quite understand the role of OpenOffice in the process.
_________________________________________________________
Regards,
Dmitry Zamula
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Maxim Solodovnik <so...@gmail.com>.
It would be great.
2012/4/2 Dmitry Zamula <cl...@gmail.com>
> I have reviewed the Apache POI, and I am confident that I can realize the
> required task. I think that using the Apache POI will be more effective
> than building a system with dedicated OpenOffice service. Am I right?
>
> Also, for Excel, I would try ExcelToFoConverter. Perhaps there will be no
> need for Excel2Html.
>
> 31 марта 2012 г. 13:17 пользователь Yegor Kozlov <yegor.kozlov@dinom.ru
> >написал:
>
> > "Yegor's library" is Apache POI, a Java API to work with MS Office
> > formats, see http://poi.apache.org
> >
> > Openmeetings has to do all those chained transformations to show doc
> > thumbnails in its Flash UI. I can see the following cases when POI can
> > help:
> >
> > 1. For .ppt and .pptx we have PPT2PNG and PPTX2PNG utilities. If PNG
> > is not an option and you need vector graphics, it is possible to
> > convert ppt directly to Flash. The idea is that the Slide object
> > implements a draw(java.awt.Graphics2D graphics) method. In PPT2PNG
> > the graphics is derived from BufferedImage and the destination is
> > image. To convert a ppt slide to SWF you need to pass a SWFGraphics2D
> > object that will translate graphics call to Flash objects. I have a
> > working prototype of such a code and will be happy to share it.
> > To do SWF in Java I use
> > http://www.flagstonesoftware.com/transform/index.html
> > It is BSD-licensed and should be OK to use in Apache projects.
> >
> > 2. For .doc files we have a WordToFOConverter that transforms .doc to
> > XSL-FO. The output then can be passed to Apache FOP to generate PDF.
> >
> > 3. For Excel we have a Excel2Html converter.
> >
> > All three are pure Java.
> >
> > Cheers,
> > Yegor
> >
> > 2012/3/31 seba.wagner@gmail.com <se...@gmail.com>:
> > > Hi Dmitry,
> > >
> > > how are you doing? Maybe I can help on some of your questions.
> > >
> > > "Do I understand right that OpenOffice is used just to convert formats?
> > In
> > > what format are documents translated?"
> > >
> > > The current process for importing documents of OpenOffice (LibreOffice)
> > > compatible files (.doc, .ppt, .xls, .docx, ...) is:
> > > (1) Convert the file to a PDF using OpenOffice [while we only trigger
> > > JODConverter that forwards the our document then to OpenOfice]
> > > (2) Convert the PDF to a thumbnail of every page using
> > > ImageMagick+GhostScript
> > > (3) Convert the PDF to a SWF with SWFTools.
> > >
> > > Sebastian
> > >
> > > 2012/3/31 Dmitry Zamula <cl...@gmail.com>
> > >
> > >> Do I understand right that OpenOffice is used just to convert formats?
> > In
> > >> what format are documents translated?
> > >> Also, there is a mention of "Yegor's library" in the task - What is
> this
> > >> library?
> > >>
> > >> 2012/3/30 Alexei Fedotov <al...@gmail.com>
> > >>
> > >> > Hi Dmitry,
> > >> > nice to hear from you
> > >> >
> > >> > 1) tasks are relevant;
> > >> > 2) sure, if complexity is not a problem,
> > >> > 3) JODConverter is actually openoffice interface
> > >> > http://code.google.com/p/jodconverter/
> > >> >
> > >> > --
> > >> > With best regards / с наилучшими пожеланиями,
> > >> > Alexei Fedotov / Алексей Федотов,
> > >> > http://dataved.ru/
> > >> > +7 916 562 8095
> > >> >
> > >> >
> > >> >
> > >> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <
> > club.brantner@gmail.com>
> > >> > wrote:
> > >> > > Hello!
> > >> > >
> > >> > > My name is Dmitry, I'm on my fifth year of information
> technologies
> > at
> > >> > the
> > >> > > National Research University of Information Technologies,
> Mechanics
> > and
> > >> > > Optics of St. Petersburg, Russia. I would like to participate in
> > GSoC
> > >> > 2012.
> > >> > > I am familiar with Java and surrounding technology (Spring, EJB,
> > >> > Hibernate
> > >> > > etc.). I have one year experience in commercial developments.
> > >> > > I want to ask you for some clarifications, about one of proposed
> > ideas:
> > >> > >
> > >> > > "performance: maybe we can set up dedicated OpenOffice service, so
> > we
> > >> > > won't need to have one for each openmeetings installation; in this
> > >> > > case we can monitor document conversion errors and stream them to
> > >> > > Apache OpenOffice project;
> > >> > >
> > >> > > another approach to document handling is replacing OpenOffice with
> > >> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library;
> > most
> > >> > of
> > >> > > them have problems with Excel though"
> > >> > >
> > >> > > Before submitting the application, I would like to clarify,
> whether
> > the
> > >> > > task is relevant today? Is it possible to use it as a summer
> > project in
> > >> > > GSoC? Do you need any proof of my competence in programming (like
> > test
> > >> > > task)?
> > >> > > I would like to ask a question about the task - As far as I
> > understand
> > >> > > whiteboard displays a static image of the document without the
> > >> > possibility
> > >> > > of editing. Openmeeting uses JDOConverter to convert formats. But
> I
> > do
> > >> > not
> > >> > > quite understand the role of OpenOffice in the process.
> > >> > >
> > >> > > _________________________________________________________
> > >> > >
> > >> > > Regards,
> > >> > > Dmitry Zamula
> > >> >
> > >>
> > >
> > >
> > >
> > > --
> > > Sebastian Wagner
> > > https://twitter.com/#!/dead_lock
> > > http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
> > > http://www.webbase-design.de
> > > http://www.wagner-sebastian.com
> > > seba.wagner@gmail.com
> >
>
>
>
> --
> _________________________________________________________
>
> С уважением,
>
> Замула Дмитрий
>
--
WBR
Maxim aka solomax
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Alexei Fedotov <al...@gmail.com>.
Dmitry, guys,
I suggest implementing a switch between two before we test POI on real
files and know that we can drop OpenOffice completely. We do not need
the whole "no regression" here, just the absence of serious issues.
--
With best regards / с наилучшими пожеланиями,
Alexei Fedotov / Алексей Федотов,
http://dataved.ru/
+7 916 562 8095
2012/4/2 Yegor Kozlov <ye...@dinom.ru>:
> 2012/4/2 Dmitry Zamula <cl...@gmail.com>:
>> I have reviewed the Apache POI, and I am confident that I can realize the
>> required task. I think that using the Apache POI will be more effective
>> than building a system with dedicated OpenOffice service. Am I right?
>>
>
> You are right, it will certainly be a more effective way than using
> OpenOffice .
>
>> Also, for Excel, I would try ExcelToFoConverter. Perhaps there will be no
>> need for Excel2Html.
>>
>
> things to note:
>
> 1. ExcelToFoConverter and WordToFoConverter are brand new features
> that were contributed only a few months back. Be aware of possible
> bugs - I'm not trying to discourage you from using these tools, just
> want to note that there can be bugs or not implemented features.
>
> 2. The quality of the output from ExcelToFoConverter and
> WordToFoConverter may differ from what you get from JODConverter.
> ExcelToFoConverter and WordToFoConverter preserve content (text,
> images) and document layout as much as possible, but the resulting
> PDF document may NOT look the same as from MS Office eye view.
>
> 3. For now WordToFoConverter supports only the .doc format. I'm not
> sure how much is the effort to support .docx - it wasn't me who wrote
> this code.
>
> Regards,
> Yegor
>
>> 31 марта 2012 г. 13:17 пользователь Yegor Kozlov <ye...@dinom.ru>написал:
>>
>>> "Yegor's library" is Apache POI, a Java API to work with MS Office
>>> formats, see http://poi.apache.org
>>>
>>> Openmeetings has to do all those chained transformations to show doc
>>> thumbnails in its Flash UI. I can see the following cases when POI can
>>> help:
>>>
>>> 1. For .ppt and .pptx we have PPT2PNG and PPTX2PNG utilities. If PNG
>>> is not an option and you need vector graphics, it is possible to
>>> convert ppt directly to Flash. The idea is that the Slide object
>>> implements a draw(java.awt.Graphics2D graphics) method. In PPT2PNG
>>> the graphics is derived from BufferedImage and the destination is
>>> image. To convert a ppt slide to SWF you need to pass a SWFGraphics2D
>>> object that will translate graphics call to Flash objects. I have a
>>> working prototype of such a code and will be happy to share it.
>>> To do SWF in Java I use
>>> http://www.flagstonesoftware.com/transform/index.html
>>> It is BSD-licensed and should be OK to use in Apache projects.
>>>
>>> 2. For .doc files we have a WordToFOConverter that transforms .doc to
>>> XSL-FO. The output then can be passed to Apache FOP to generate PDF.
>>>
>>> 3. For Excel we have a Excel2Html converter.
>>>
>>> All three are pure Java.
>>>
>>> Cheers,
>>> Yegor
>>>
>>> 2012/3/31 seba.wagner@gmail.com <se...@gmail.com>:
>>> > Hi Dmitry,
>>> >
>>> > how are you doing? Maybe I can help on some of your questions.
>>> >
>>> > "Do I understand right that OpenOffice is used just to convert formats?
>>> In
>>> > what format are documents translated?"
>>> >
>>> > The current process for importing documents of OpenOffice (LibreOffice)
>>> > compatible files (.doc, .ppt, .xls, .docx, ...) is:
>>> > (1) Convert the file to a PDF using OpenOffice [while we only trigger
>>> > JODConverter that forwards the our document then to OpenOfice]
>>> > (2) Convert the PDF to a thumbnail of every page using
>>> > ImageMagick+GhostScript
>>> > (3) Convert the PDF to a SWF with SWFTools.
>>> >
>>> > Sebastian
>>> >
>>> > 2012/3/31 Dmitry Zamula <cl...@gmail.com>
>>> >
>>> >> Do I understand right that OpenOffice is used just to convert formats?
>>> In
>>> >> what format are documents translated?
>>> >> Also, there is a mention of "Yegor's library" in the task - What is this
>>> >> library?
>>> >>
>>> >> 2012/3/30 Alexei Fedotov <al...@gmail.com>
>>> >>
>>> >> > Hi Dmitry,
>>> >> > nice to hear from you
>>> >> >
>>> >> > 1) tasks are relevant;
>>> >> > 2) sure, if complexity is not a problem,
>>> >> > 3) JODConverter is actually openoffice interface
>>> >> > http://code.google.com/p/jodconverter/
>>> >> >
>>> >> > --
>>> >> > With best regards / с наилучшими пожеланиями,
>>> >> > Alexei Fedotov / Алексей Федотов,
>>> >> > http://dataved.ru/
>>> >> > +7 916 562 8095
>>> >> >
>>> >> >
>>> >> >
>>> >> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <
>>> club.brantner@gmail.com>
>>> >> > wrote:
>>> >> > > Hello!
>>> >> > >
>>> >> > > My name is Dmitry, I'm on my fifth year of information technologies
>>> at
>>> >> > the
>>> >> > > National Research University of Information Technologies, Mechanics
>>> and
>>> >> > > Optics of St. Petersburg, Russia. I would like to participate in
>>> GSoC
>>> >> > 2012.
>>> >> > > I am familiar with Java and surrounding technology (Spring, EJB,
>>> >> > Hibernate
>>> >> > > etc.). I have one year experience in commercial developments.
>>> >> > > I want to ask you for some clarifications, about one of proposed
>>> ideas:
>>> >> > >
>>> >> > > "performance: maybe we can set up dedicated OpenOffice service, so
>>> we
>>> >> > > won't need to have one for each openmeetings installation; in this
>>> >> > > case we can monitor document conversion errors and stream them to
>>> >> > > Apache OpenOffice project;
>>> >> > >
>>> >> > > another approach to document handling is replacing OpenOffice with
>>> >> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library;
>>> most
>>> >> > of
>>> >> > > them have problems with Excel though"
>>> >> > >
>>> >> > > Before submitting the application, I would like to clarify, whether
>>> the
>>> >> > > task is relevant today? Is it possible to use it as a summer
>>> project in
>>> >> > > GSoC? Do you need any proof of my competence in programming (like
>>> test
>>> >> > > task)?
>>> >> > > I would like to ask a question about the task - As far as I
>>> understand
>>> >> > > whiteboard displays a static image of the document without the
>>> >> > possibility
>>> >> > > of editing. Openmeeting uses JDOConverter to convert formats. But I
>>> do
>>> >> > not
>>> >> > > quite understand the role of OpenOffice in the process.
>>> >> > >
>>> >> > > _________________________________________________________
>>> >> > >
>>> >> > > Regards,
>>> >> > > Dmitry Zamula
>>> >> >
>>> >>
>>> >
>>> >
>>> >
>>> > --
>>> > Sebastian Wagner
>>> > https://twitter.com/#!/dead_lock
>>> > http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
>>> > http://www.webbase-design.de
>>> > http://www.wagner-sebastian.com
>>> > seba.wagner@gmail.com
>>>
>>
>>
>>
>> --
>> _________________________________________________________
>>
>> С уважением,
>>
>> Замула Дмитрий
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Yegor Kozlov <ye...@dinom.ru>.
2012/4/2 Dmitry Zamula <cl...@gmail.com>:
> I have reviewed the Apache POI, and I am confident that I can realize the
> required task. I think that using the Apache POI will be more effective
> than building a system with dedicated OpenOffice service. Am I right?
>
You are right, it will certainly be a more effective way than using
OpenOffice .
> Also, for Excel, I would try ExcelToFoConverter. Perhaps there will be no
> need for Excel2Html.
>
things to note:
1. ExcelToFoConverter and WordToFoConverter are brand new features
that were contributed only a few months back. Be aware of possible
bugs - I'm not trying to discourage you from using these tools, just
want to note that there can be bugs or not implemented features.
2. The quality of the output from ExcelToFoConverter and
WordToFoConverter may differ from what you get from JODConverter.
ExcelToFoConverter and WordToFoConverter preserve content (text,
images) and document layout as much as possible, but the resulting
PDF document may NOT look the same as from MS Office eye view.
3. For now WordToFoConverter supports only the .doc format. I'm not
sure how much is the effort to support .docx - it wasn't me who wrote
this code.
Regards,
Yegor
> 31 марта 2012 г. 13:17 пользователь Yegor Kozlov <ye...@dinom.ru>написал:
>
>> "Yegor's library" is Apache POI, a Java API to work with MS Office
>> formats, see http://poi.apache.org
>>
>> Openmeetings has to do all those chained transformations to show doc
>> thumbnails in its Flash UI. I can see the following cases when POI can
>> help:
>>
>> 1. For .ppt and .pptx we have PPT2PNG and PPTX2PNG utilities. If PNG
>> is not an option and you need vector graphics, it is possible to
>> convert ppt directly to Flash. The idea is that the Slide object
>> implements a draw(java.awt.Graphics2D graphics) method. In PPT2PNG
>> the graphics is derived from BufferedImage and the destination is
>> image. To convert a ppt slide to SWF you need to pass a SWFGraphics2D
>> object that will translate graphics call to Flash objects. I have a
>> working prototype of such a code and will be happy to share it.
>> To do SWF in Java I use
>> http://www.flagstonesoftware.com/transform/index.html
>> It is BSD-licensed and should be OK to use in Apache projects.
>>
>> 2. For .doc files we have a WordToFOConverter that transforms .doc to
>> XSL-FO. The output then can be passed to Apache FOP to generate PDF.
>>
>> 3. For Excel we have a Excel2Html converter.
>>
>> All three are pure Java.
>>
>> Cheers,
>> Yegor
>>
>> 2012/3/31 seba.wagner@gmail.com <se...@gmail.com>:
>> > Hi Dmitry,
>> >
>> > how are you doing? Maybe I can help on some of your questions.
>> >
>> > "Do I understand right that OpenOffice is used just to convert formats?
>> In
>> > what format are documents translated?"
>> >
>> > The current process for importing documents of OpenOffice (LibreOffice)
>> > compatible files (.doc, .ppt, .xls, .docx, ...) is:
>> > (1) Convert the file to a PDF using OpenOffice [while we only trigger
>> > JODConverter that forwards the our document then to OpenOfice]
>> > (2) Convert the PDF to a thumbnail of every page using
>> > ImageMagick+GhostScript
>> > (3) Convert the PDF to a SWF with SWFTools.
>> >
>> > Sebastian
>> >
>> > 2012/3/31 Dmitry Zamula <cl...@gmail.com>
>> >
>> >> Do I understand right that OpenOffice is used just to convert formats?
>> In
>> >> what format are documents translated?
>> >> Also, there is a mention of "Yegor's library" in the task - What is this
>> >> library?
>> >>
>> >> 2012/3/30 Alexei Fedotov <al...@gmail.com>
>> >>
>> >> > Hi Dmitry,
>> >> > nice to hear from you
>> >> >
>> >> > 1) tasks are relevant;
>> >> > 2) sure, if complexity is not a problem,
>> >> > 3) JODConverter is actually openoffice interface
>> >> > http://code.google.com/p/jodconverter/
>> >> >
>> >> > --
>> >> > With best regards / с наилучшими пожеланиями,
>> >> > Alexei Fedotov / Алексей Федотов,
>> >> > http://dataved.ru/
>> >> > +7 916 562 8095
>> >> >
>> >> >
>> >> >
>> >> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <
>> club.brantner@gmail.com>
>> >> > wrote:
>> >> > > Hello!
>> >> > >
>> >> > > My name is Dmitry, I'm on my fifth year of information technologies
>> at
>> >> > the
>> >> > > National Research University of Information Technologies, Mechanics
>> and
>> >> > > Optics of St. Petersburg, Russia. I would like to participate in
>> GSoC
>> >> > 2012.
>> >> > > I am familiar with Java and surrounding technology (Spring, EJB,
>> >> > Hibernate
>> >> > > etc.). I have one year experience in commercial developments.
>> >> > > I want to ask you for some clarifications, about one of proposed
>> ideas:
>> >> > >
>> >> > > "performance: maybe we can set up dedicated OpenOffice service, so
>> we
>> >> > > won't need to have one for each openmeetings installation; in this
>> >> > > case we can monitor document conversion errors and stream them to
>> >> > > Apache OpenOffice project;
>> >> > >
>> >> > > another approach to document handling is replacing OpenOffice with
>> >> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library;
>> most
>> >> > of
>> >> > > them have problems with Excel though"
>> >> > >
>> >> > > Before submitting the application, I would like to clarify, whether
>> the
>> >> > > task is relevant today? Is it possible to use it as a summer
>> project in
>> >> > > GSoC? Do you need any proof of my competence in programming (like
>> test
>> >> > > task)?
>> >> > > I would like to ask a question about the task - As far as I
>> understand
>> >> > > whiteboard displays a static image of the document without the
>> >> > possibility
>> >> > > of editing. Openmeeting uses JDOConverter to convert formats. But I
>> do
>> >> > not
>> >> > > quite understand the role of OpenOffice in the process.
>> >> > >
>> >> > > _________________________________________________________
>> >> > >
>> >> > > Regards,
>> >> > > Dmitry Zamula
>> >> >
>> >>
>> >
>> >
>> >
>> > --
>> > Sebastian Wagner
>> > https://twitter.com/#!/dead_lock
>> > http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
>> > http://www.webbase-design.de
>> > http://www.wagner-sebastian.com
>> > seba.wagner@gmail.com
>>
>
>
>
> --
> _________________________________________________________
>
> С уважением,
>
> Замула Дмитрий
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Dmitry Zamula <cl...@gmail.com>.
I have reviewed the Apache POI, and I am confident that I can realize the
required task. I think that using the Apache POI will be more effective
than building a system with dedicated OpenOffice service. Am I right?
Also, for Excel, I would try ExcelToFoConverter. Perhaps there will be no
need for Excel2Html.
31 марта 2012 г. 13:17 пользователь Yegor Kozlov <ye...@dinom.ru>написал:
> "Yegor's library" is Apache POI, a Java API to work with MS Office
> formats, see http://poi.apache.org
>
> Openmeetings has to do all those chained transformations to show doc
> thumbnails in its Flash UI. I can see the following cases when POI can
> help:
>
> 1. For .ppt and .pptx we have PPT2PNG and PPTX2PNG utilities. If PNG
> is not an option and you need vector graphics, it is possible to
> convert ppt directly to Flash. The idea is that the Slide object
> implements a draw(java.awt.Graphics2D graphics) method. In PPT2PNG
> the graphics is derived from BufferedImage and the destination is
> image. To convert a ppt slide to SWF you need to pass a SWFGraphics2D
> object that will translate graphics call to Flash objects. I have a
> working prototype of such a code and will be happy to share it.
> To do SWF in Java I use
> http://www.flagstonesoftware.com/transform/index.html
> It is BSD-licensed and should be OK to use in Apache projects.
>
> 2. For .doc files we have a WordToFOConverter that transforms .doc to
> XSL-FO. The output then can be passed to Apache FOP to generate PDF.
>
> 3. For Excel we have a Excel2Html converter.
>
> All three are pure Java.
>
> Cheers,
> Yegor
>
> 2012/3/31 seba.wagner@gmail.com <se...@gmail.com>:
> > Hi Dmitry,
> >
> > how are you doing? Maybe I can help on some of your questions.
> >
> > "Do I understand right that OpenOffice is used just to convert formats?
> In
> > what format are documents translated?"
> >
> > The current process for importing documents of OpenOffice (LibreOffice)
> > compatible files (.doc, .ppt, .xls, .docx, ...) is:
> > (1) Convert the file to a PDF using OpenOffice [while we only trigger
> > JODConverter that forwards the our document then to OpenOfice]
> > (2) Convert the PDF to a thumbnail of every page using
> > ImageMagick+GhostScript
> > (3) Convert the PDF to a SWF with SWFTools.
> >
> > Sebastian
> >
> > 2012/3/31 Dmitry Zamula <cl...@gmail.com>
> >
> >> Do I understand right that OpenOffice is used just to convert formats?
> In
> >> what format are documents translated?
> >> Also, there is a mention of "Yegor's library" in the task - What is this
> >> library?
> >>
> >> 2012/3/30 Alexei Fedotov <al...@gmail.com>
> >>
> >> > Hi Dmitry,
> >> > nice to hear from you
> >> >
> >> > 1) tasks are relevant;
> >> > 2) sure, if complexity is not a problem,
> >> > 3) JODConverter is actually openoffice interface
> >> > http://code.google.com/p/jodconverter/
> >> >
> >> > --
> >> > With best regards / с наилучшими пожеланиями,
> >> > Alexei Fedotov / Алексей Федотов,
> >> > http://dataved.ru/
> >> > +7 916 562 8095
> >> >
> >> >
> >> >
> >> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <
> club.brantner@gmail.com>
> >> > wrote:
> >> > > Hello!
> >> > >
> >> > > My name is Dmitry, I'm on my fifth year of information technologies
> at
> >> > the
> >> > > National Research University of Information Technologies, Mechanics
> and
> >> > > Optics of St. Petersburg, Russia. I would like to participate in
> GSoC
> >> > 2012.
> >> > > I am familiar with Java and surrounding technology (Spring, EJB,
> >> > Hibernate
> >> > > etc.). I have one year experience in commercial developments.
> >> > > I want to ask you for some clarifications, about one of proposed
> ideas:
> >> > >
> >> > > "performance: maybe we can set up dedicated OpenOffice service, so
> we
> >> > > won't need to have one for each openmeetings installation; in this
> >> > > case we can monitor document conversion errors and stream them to
> >> > > Apache OpenOffice project;
> >> > >
> >> > > another approach to document handling is replacing OpenOffice with
> >> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library;
> most
> >> > of
> >> > > them have problems with Excel though"
> >> > >
> >> > > Before submitting the application, I would like to clarify, whether
> the
> >> > > task is relevant today? Is it possible to use it as a summer
> project in
> >> > > GSoC? Do you need any proof of my competence in programming (like
> test
> >> > > task)?
> >> > > I would like to ask a question about the task - As far as I
> understand
> >> > > whiteboard displays a static image of the document without the
> >> > possibility
> >> > > of editing. Openmeeting uses JDOConverter to convert formats. But I
> do
> >> > not
> >> > > quite understand the role of OpenOffice in the process.
> >> > >
> >> > > _________________________________________________________
> >> > >
> >> > > Regards,
> >> > > Dmitry Zamula
> >> >
> >>
> >
> >
> >
> > --
> > Sebastian Wagner
> > https://twitter.com/#!/dead_lock
> > http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
> > http://www.webbase-design.de
> > http://www.wagner-sebastian.com
> > seba.wagner@gmail.com
>
--
_________________________________________________________
С уважением,
Замула Дмитрий
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Yegor Kozlov <ye...@dinom.ru>.
"Yegor's library" is Apache POI, a Java API to work with MS Office
formats, see http://poi.apache.org
Openmeetings has to do all those chained transformations to show doc
thumbnails in its Flash UI. I can see the following cases when POI can
help:
1. For .ppt and .pptx we have PPT2PNG and PPTX2PNG utilities. If PNG
is not an option and you need vector graphics, it is possible to
convert ppt directly to Flash. The idea is that the Slide object
implements a draw(java.awt.Graphics2D graphics) method. In PPT2PNG
the graphics is derived from BufferedImage and the destination is
image. To convert a ppt slide to SWF you need to pass a SWFGraphics2D
object that will translate graphics call to Flash objects. I have a
working prototype of such a code and will be happy to share it.
To do SWF in Java I use http://www.flagstonesoftware.com/transform/index.html
It is BSD-licensed and should be OK to use in Apache projects.
2. For .doc files we have a WordToFOConverter that transforms .doc to
XSL-FO. The output then can be passed to Apache FOP to generate PDF.
3. For Excel we have a Excel2Html converter.
All three are pure Java.
Cheers,
Yegor
2012/3/31 seba.wagner@gmail.com <se...@gmail.com>:
> Hi Dmitry,
>
> how are you doing? Maybe I can help on some of your questions.
>
> "Do I understand right that OpenOffice is used just to convert formats? In
> what format are documents translated?"
>
> The current process for importing documents of OpenOffice (LibreOffice)
> compatible files (.doc, .ppt, .xls, .docx, ...) is:
> (1) Convert the file to a PDF using OpenOffice [while we only trigger
> JODConverter that forwards the our document then to OpenOfice]
> (2) Convert the PDF to a thumbnail of every page using
> ImageMagick+GhostScript
> (3) Convert the PDF to a SWF with SWFTools.
>
> Sebastian
>
> 2012/3/31 Dmitry Zamula <cl...@gmail.com>
>
>> Do I understand right that OpenOffice is used just to convert formats? In
>> what format are documents translated?
>> Also, there is a mention of "Yegor's library" in the task - What is this
>> library?
>>
>> 2012/3/30 Alexei Fedotov <al...@gmail.com>
>>
>> > Hi Dmitry,
>> > nice to hear from you
>> >
>> > 1) tasks are relevant;
>> > 2) sure, if complexity is not a problem,
>> > 3) JODConverter is actually openoffice interface
>> > http://code.google.com/p/jodconverter/
>> >
>> > --
>> > With best regards / с наилучшими пожеланиями,
>> > Alexei Fedotov / Алексей Федотов,
>> > http://dataved.ru/
>> > +7 916 562 8095
>> >
>> >
>> >
>> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <cl...@gmail.com>
>> > wrote:
>> > > Hello!
>> > >
>> > > My name is Dmitry, I'm on my fifth year of information technologies at
>> > the
>> > > National Research University of Information Technologies, Mechanics and
>> > > Optics of St. Petersburg, Russia. I would like to participate in GSoC
>> > 2012.
>> > > I am familiar with Java and surrounding technology (Spring, EJB,
>> > Hibernate
>> > > etc.). I have one year experience in commercial developments.
>> > > I want to ask you for some clarifications, about one of proposed ideas:
>> > >
>> > > "performance: maybe we can set up dedicated OpenOffice service, so we
>> > > won't need to have one for each openmeetings installation; in this
>> > > case we can monitor document conversion errors and stream them to
>> > > Apache OpenOffice project;
>> > >
>> > > another approach to document handling is replacing OpenOffice with
>> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library; most
>> > of
>> > > them have problems with Excel though"
>> > >
>> > > Before submitting the application, I would like to clarify, whether the
>> > > task is relevant today? Is it possible to use it as a summer project in
>> > > GSoC? Do you need any proof of my competence in programming (like test
>> > > task)?
>> > > I would like to ask a question about the task - As far as I understand
>> > > whiteboard displays a static image of the document without the
>> > possibility
>> > > of editing. Openmeeting uses JDOConverter to convert formats. But I do
>> > not
>> > > quite understand the role of OpenOffice in the process.
>> > >
>> > > _________________________________________________________
>> > >
>> > > Regards,
>> > > Dmitry Zamula
>> >
>>
>
>
>
> --
> Sebastian Wagner
> https://twitter.com/#!/dead_lock
> http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
> http://www.webbase-design.de
> http://www.wagner-sebastian.com
> seba.wagner@gmail.com
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by "seba.wagner@gmail.com" <se...@gmail.com>.
Hi Dmitry,
how are you doing? Maybe I can help on some of your questions.
"Do I understand right that OpenOffice is used just to convert formats? In
what format are documents translated?"
The current process for importing documents of OpenOffice (LibreOffice)
compatible files (.doc, .ppt, .xls, .docx, ...) is:
(1) Convert the file to a PDF using OpenOffice [while we only trigger
JODConverter that forwards the our document then to OpenOfice]
(2) Convert the PDF to a thumbnail of every page using
ImageMagick+GhostScript
(3) Convert the PDF to a SWF with SWFTools.
Sebastian
2012/3/31 Dmitry Zamula <cl...@gmail.com>
> Do I understand right that OpenOffice is used just to convert formats? In
> what format are documents translated?
> Also, there is a mention of "Yegor's library" in the task - What is this
> library?
>
> 2012/3/30 Alexei Fedotov <al...@gmail.com>
>
> > Hi Dmitry,
> > nice to hear from you
> >
> > 1) tasks are relevant;
> > 2) sure, if complexity is not a problem,
> > 3) JODConverter is actually openoffice interface
> > http://code.google.com/p/jodconverter/
> >
> > --
> > With best regards / с наилучшими пожеланиями,
> > Alexei Fedotov / Алексей Федотов,
> > http://dataved.ru/
> > +7 916 562 8095
> >
> >
> >
> > On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <cl...@gmail.com>
> > wrote:
> > > Hello!
> > >
> > > My name is Dmitry, I'm on my fifth year of information technologies at
> > the
> > > National Research University of Information Technologies, Mechanics and
> > > Optics of St. Petersburg, Russia. I would like to participate in GSoC
> > 2012.
> > > I am familiar with Java and surrounding technology (Spring, EJB,
> > Hibernate
> > > etc.). I have one year experience in commercial developments.
> > > I want to ask you for some clarifications, about one of proposed ideas:
> > >
> > > "performance: maybe we can set up dedicated OpenOffice service, so we
> > > won't need to have one for each openmeetings installation; in this
> > > case we can monitor document conversion errors and stream them to
> > > Apache OpenOffice project;
> > >
> > > another approach to document handling is replacing OpenOffice with
> > > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library; most
> > of
> > > them have problems with Excel though"
> > >
> > > Before submitting the application, I would like to clarify, whether the
> > > task is relevant today? Is it possible to use it as a summer project in
> > > GSoC? Do you need any proof of my competence in programming (like test
> > > task)?
> > > I would like to ask a question about the task - As far as I understand
> > > whiteboard displays a static image of the document without the
> > possibility
> > > of editing. Openmeeting uses JDOConverter to convert formats. But I do
> > not
> > > quite understand the role of OpenOffice in the process.
> > >
> > > _________________________________________________________
> > >
> > > Regards,
> > > Dmitry Zamula
> >
>
--
Sebastian Wagner
https://twitter.com/#!/dead_lock
http://www.openmeetings.de <http://incubator.apache.org/openmeetings/>
http://www.webbase-design.de
http://www.wagner-sebastian.com
seba.wagner@gmail.com
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Dmitry Zamula <cl...@gmail.com>.
Do I understand right that OpenOffice is used just to convert formats? In
what format are documents translated?
Also, there is a mention of "Yegor's library" in the task - What is this
library?
2012/3/30 Alexei Fedotov <al...@gmail.com>
> Hi Dmitry,
> nice to hear from you
>
> 1) tasks are relevant;
> 2) sure, if complexity is not a problem,
> 3) JODConverter is actually openoffice interface
> http://code.google.com/p/jodconverter/
>
> --
> With best regards / с наилучшими пожеланиями,
> Alexei Fedotov / Алексей Федотов,
> http://dataved.ru/
> +7 916 562 8095
>
>
>
> On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <cl...@gmail.com>
> wrote:
> > Hello!
> >
> > My name is Dmitry, I'm on my fifth year of information technologies at
> the
> > National Research University of Information Technologies, Mechanics and
> > Optics of St. Petersburg, Russia. I would like to participate in GSoC
> 2012.
> > I am familiar with Java and surrounding technology (Spring, EJB,
> Hibernate
> > etc.). I have one year experience in commercial developments.
> > I want to ask you for some clarifications, about one of proposed ideas:
> >
> > "performance: maybe we can set up dedicated OpenOffice service, so we
> > won't need to have one for each openmeetings installation; in this
> > case we can monitor document conversion errors and stream them to
> > Apache OpenOffice project;
> >
> > another approach to document handling is replacing OpenOffice with
> > Zimbra, or Google Wave (which is Apache Wave), or Yegor's library; most
> of
> > them have problems with Excel though"
> >
> > Before submitting the application, I would like to clarify, whether the
> > task is relevant today? Is it possible to use it as a summer project in
> > GSoC? Do you need any proof of my competence in programming (like test
> > task)?
> > I would like to ask a question about the task - As far as I understand
> > whiteboard displays a static image of the document without the
> possibility
> > of editing. Openmeeting uses JDOConverter to convert formats. But I do
> not
> > quite understand the role of OpenOffice in the process.
> >
> > _________________________________________________________
> >
> > Regards,
> > Dmitry Zamula
>
Re: [GSoC 2012] Question about OpenOffice in Openmeetings
Posted by Alexei Fedotov <al...@gmail.com>.
Hi Dmitry,
nice to hear from you
1) tasks are relevant;
2) sure, if complexity is not a problem,
3) JODConverter is actually openoffice interface
http://code.google.com/p/jodconverter/
--
With best regards / с наилучшими пожеланиями,
Alexei Fedotov / Алексей Федотов,
http://dataved.ru/
+7 916 562 8095
On Fri, Mar 30, 2012 at 3:50 PM, Dmitry Zamula <cl...@gmail.com> wrote:
> Hello!
>
> My name is Dmitry, I'm on my fifth year of information technologies at the
> National Research University of Information Technologies, Mechanics and
> Optics of St. Petersburg, Russia. I would like to participate in GSoC 2012.
> I am familiar with Java and surrounding technology (Spring, EJB, Hibernate
> etc.). I have one year experience in commercial developments.
> I want to ask you for some clarifications, about one of proposed ideas:
>
> "performance: maybe we can set up dedicated OpenOffice service, so we
> won't need to have one for each openmeetings installation; in this
> case we can monitor document conversion errors and stream them to
> Apache OpenOffice project;
>
> another approach to document handling is replacing OpenOffice with
> Zimbra, or Google Wave (which is Apache Wave), or Yegor's library; most of
> them have problems with Excel though"
>
> Before submitting the application, I would like to clarify, whether the
> task is relevant today? Is it possible to use it as a summer project in
> GSoC? Do you need any proof of my competence in programming (like test
> task)?
> I would like to ask a question about the task - As far as I understand
> whiteboard displays a static image of the document without the possibility
> of editing. Openmeeting uses JDOConverter to convert formats. But I do not
> quite understand the role of OpenOffice in the process.
>
> _________________________________________________________
>
> Regards,
> Dmitry Zamula