[poppler] Form-Reset and Print [patches]

[Carlos Garcia Campos]

Excerpts from Guillermo Amaral's message of lun jun 14 05:37:16 +0200 2010:
> On Sun, Jun 13, 2010 at 11:02:56PM +0100, Albert Astals Cid wrote:
> > A Diumenge, 13 de juny de 2010, Guillermo Amaral va escriure:
> > > On Sun, Jun 13, 2010 at 10:21:35AM +0200, Carlos Garcia Campos wrote:
> > > > Excerpts from Guillermo Amaral's message of dom jun 13 04:40:44 +0200 
> > 2010:
> > > > > Albert Astals Cid <aacid at kde.org> wrote:
> > > > > > A Dissabte, 12 de juny de 2010, Guillermo Amaral va escriure:
> > > > > >> I wanted to send in these patches, they allow handling of reset-form
> > > > > >> and print actions respectably.
> > > > > >> 
> > > > > >> Please check them out, and if you have any questions please don't
> > > > > >> hesitate to ask.
> > > > > > 
> > > > > > Do you have a document that uses them?
> > > > > > 
> > > > >   I do, but I dunno if I can share them ATM, looking into it.
> > > > >   But I did make a test pdf that uses both features. :-)
> > > > >   
> > > > > > Also what is the point of
> > > > > > 
> > > > > > +  } else if (obj2.isName("ResetForm")) {
> > > > > > +    action = new LinkResetForm(obj2.getName());
> > > > > > 
> > > > >   As usual, you are right aacid :) I try a little to hard not to break
> > > > >   the flow of other programs, I think I went to far lol (fixed)
> > > > >   
> > > > > > And
> > > > > > if (obj->dictLookup("AA", &tmp)->isDict())
> > > > > > seems like an unrelated fix, can you please explain it too?
> > > > > > 
> > > > >   Mixed them up, that one should be in the print patch (moved).
> > > > >   Sometimes the AA dict is used to hold a ref to the named object. I
> > > > >   have seen it in two docs so far, it seems to happen when people set
> > > > >   an action to happen on mouse down instead of mouse up. It should not
> > > > >   break anything else (as far as I can see).
> > > > 
> > > > We should definitely add support for additional actions properly in
> > > > poppler.
> > > > 
> > > > > diff --git a/poppler/Link.cc b/poppler/Link.cc
> > > > > index 5d7b779..e3d6ce7 100644
> > > > > --- a/poppler/Link.cc
> > > > > +++ b/poppler/Link.cc
> > > > > @@ -124,6 +124,10 @@ LinkAction *LinkAction::parseAction(Object *obj,
> > > > > GooString *baseURI) {
> > > > > 
> > > > >    } else if (obj2.isName("SetOCGState")) {
> > > > >    
> > > > >      action = new LinkOCGState(obj);
> > > > > 
> > > > > +  // ResetForm action
> > > > > +  } else if (obj2.isName("ResetForm")) {
> > > > > +    action = new LinkResetForm();
> > > > > +
> > > > > 
> > > > >    // unknown action
> > > > >    } else if (obj2.isName()) {
> > > > >    
> > > > >      action = new LinkUnknown(obj2.getName());
> > > > > 
> > > > > @@ -856,6 +860,18 @@ LinkOCGState::StateList::~StateList() {
> > > > > 
> > > > >  }
> > > > >  
> > > > >  //--------------------------------------------------------------------
> > > > >  ----
> > > > > 
> > > > > +// LinkFormClear
> > > > > +//--------------------------------------------------------------------
> > > > > ---- +
> > > > > +LinkResetForm::LinkResetForm() {
> > > > > +  action = new GooString("ResetForm");
> > > > 
> > > > this is redundant, you already know it's a LinkResetForm object. You
> > > > should parse Fields and Flags here.
> > > 
> > >   Yeah it's a partial patch, it allows the client to know it has to reset..
> > >   I guess I could make it reset the fields in the fieldlist here and just
> > >   notify the client the form values have changed or something? what do you
> > >   guys think?
> > > 
> > >   As far as it being redundant T_T yep totally. but I do see that
> > >   the getAction() accessor returns said action GooString ptr, as I said
> > > before I don't want to rock the boat; I'm guessing that method is used
> > > some place else so I don't want to take it out willy nilly. But I do want
> > > to make it clear (if it's not totally obvious already) that I'm not
> > > completely familiar with the popplers code. ;-)
> > 
> > getAction() used somewhere? It's not virtual and you don't use it anywhere, so 
> > where is it going to be used?
> > 
> 
>   Mmm thought it was lol, dammit.
>   Anyway, I added the missing features to the reset form patch today, check it out.
> 
>   Cheers,
>   GA
> 
> diff --git a/poppler/Link.cc b/poppler/Link.cc
> index 5d7b779..abb17b6 100644
> --- a/poppler/Link.cc
> +++ b/poppler/Link.cc
> @@ -124,6 +124,10 @@ LinkAction *LinkAction::parseAction(Object *obj, GooString *baseURI) {
>    } else if (obj2.isName("SetOCGState")) {
>      action = new LinkOCGState(obj);
>  
> +  // ResetForm action
> +  } else if (obj2.isName("ResetForm")) {
> +    action = new LinkResetForm(obj);
> +
>    // unknown action
>    } else if (obj2.isName()) {
>      action = new LinkUnknown(obj2.getName());
> @@ -856,6 +860,40 @@ LinkOCGState::StateList::~StateList() {
>  }
>  
>  //------------------------------------------------------------------------
> +// LinkResetForm
> +//------------------------------------------------------------------------
> +
> +LinkResetForm::LinkResetForm(Object *obj) {
> +  Object obj1;
> +
> +  fieldList = new GooList();
> +  flags = 0;
> +
> +  if (obj->dictLookup("Fields", &obj1)->isArray()) {
> +    for (int i = 0; i < obj1.arrayGetLength(); ++i) {
> +      Object obj2;
> +      obj1.arrayGetNF(i, &obj2);
> +      fieldList->append(obj2.getString()->copy());
> +      obj2.free();
> +    }

Fields items can be either strings or indirect references depending on
Flags, and both kinds can be mixed. This will fail if obj2 is not a
string. 

Regards, 
-- 
Carlos Garcia Campos
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x523E6462
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