Subject: Re: Help with copying a page without text 2007-10-08 - By Sarath Dorbala
Back
Thank you for all your help.
The idea with Vim plugin and editor worked with the PDFs created with iText.
I have few PDF documents which do not show any human readable text with Vim.
The PDF's created with iText are readable. But when I tried to use
PDFReader.getPageContent() with the documents I had, I got the text better.
But can I just edit the content and set it to any blank page? I don't know
if this is feasible.
Thank you,
Sarath Dorbala.
On 10/8/07, Leonard Rosenthol <leonardr@(protected)> wrote:
>
> Not being a vim user, I was unable to validate this.
>
> So that's a quite trick that it is using to decompress page content
> streams for editing...
>
>
> I stand corrected about it creating invalid PDFs - though I still think it
> sets a bad precedent ;).
>
>
> Leonard
>
> On Oct 7, 2007, at 8:32 PM, William A. Segraves wrote:
>
> Leonard, you're advice is usually much better quality.
>
> I regret you did not try the procedure I outlined before you passed
> judgement on it. If you had tried the procedure, I expect you would have
> found it works just fine for the example that was used.
>
> Readers interested in the procedure outlined below, despite Leonard's
> advice, can consult Sid Steward's excellent Pdftk web site,
> www.accesspdf.com, for the inspiration for the below procedure.
>
> I hasten to add the Leonard is correct about editing a PDF damaging it.
> That's why the Pdftk plugin for Vim is used, i.e., to repair the damaged
> PDF. It's not a new idea, as it's been on Sid's site since 11Feb2005,
> http://www.accesspdf.com/index.php?page=2.
>
> Best regards,
> Bill Segraves
>
> -- -- Original Message -- --
> *From:* Leonard Rosenthol <leonardr@(protected)>
> *To:* Post all your questions about iText here<itext-questions@(protected)
.sourceforge.net>
> *Sent:* Sunday, October 07, 2007 6:58 PM
> *Subject:* Re: [iText-questions] Help with copying a page without text
>
>
> Note that doing so will create an invalid PDF :(.
>
> Please do NOT try to edit a PDF using text editors...
>
> Leonard
>
>
> On Oct 7, 2007, at 11:36 AM, wasegraves@(protected) wrote:
>
> > Not exactly. It's not possible, except when it's possible.
> >
> > Here's an approach that works for the MyFirstTable example in the
> > iText tutorial.
> >
> > 1. Download and install Vim (This author used Vim 6.3).
> >
> > 2. Download and install Pdftk (This author used Pdftk 1.12),
> > i.e., copy pdftk.exe into the Vim plugin directory.
> >
> > 3. Download and install the Pdftk plugin in the Vim plugins
> > directory, i.e., copy pdftk.vim into the Vim plugin directory.
> >
> > 4. Open MyFirstTable.pdf with Vim.
> >
> > 5. Find the text "cell test2" in the second cell in the fourth
> > row of the table and delete the text.
> >
> > 6. Save the PDF as MyFirstTable_revised.pdf.
> >
> > 7. Open MyFirstTable_revised.pdf with Reader and see that the
> > text "cell test2" is now gone.
> >
> > Note that this procedure uses iText indirectly, as Pdftk is based
> > on iText.
> >
> > Cheers,
> > Bill Segraves
> >
> > -- ---- ------ Original message from Leonard Rosenthol
> > <leonardr@(protected)>: -- ---- ------
> >
> >
> > > No, it's not possible.
> > >
> > > Nor will you find any PDF library that will offer that due to the
> > way
> > > that PDF is structured. See the other current discussion about "how
> > > to read text on a page"...
> > >
> > >
> > > Leonard
> > >
> > > On Oct 6, 2007, at 4:28 PM, Sarath Dorbala wrote:
> > >
> > > > Hello,
> > > >
> > > > I am pretty new to PDF and iText. I have a situation where I need
> > > > to copy a page to another (new) page with no text from the first
> > > > page. For example, if i have a table in page 1, I need to copy
> > that
> > > > to a new page and but not text in that cell. I don't know if this
> > > > is possible in iText.
> > > >
> > > > Thank you.
> > <snip>< /BLOCK QUOTE>
> > -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
> > ---
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>
>
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>
>
>
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>
<div>Thank you for all your help.</div>
<div> </div>
<div>The idea with Vim plugin and editor worked with the PDFs created with
iText. I have few PDF documents which do not show any human readable text with
Vim. The PDF's created with iText are readable. But when I tried to use
PDFReader.getPageContent() with the documents I had, I got the text better. But
can I just edit the content and set it to any blank page? I don't know
if this is feasible.</div>
<div> </div>
<div>Thank you,</div>
<div>Sarath Dorbala.<br> </div>
<div><span class="gmail_quote">On 10/8/07, <b class="gmail_sendername">Leonard
Rosenthol</b> <<a href="mailto:leonardr@(protected)">leonardr@(protected)<
/a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0
.8ex; BORDER-LEFT: #ccc 1px solid">
<div style="WORD-WRAP: break-word">Not being a vim user, I was unable to
validate this.
<div><br> </div>
<div>So that's a quite trick that it is using to decompress page content
streams for editing...</div>
<div><br> </div>
<div>I stand corrected about it creating invalid PDFs - though I still think it
sets a bad precedent ;).</div>
<div><br> </div>
<div>Leonard</div>
<div><br>
<div>
<div><span class="e" id="q_1157f6712646a5a7_1">
<div>On Oct 7, 2007, at 8:32 PM, William A. Segraves wrote:</div><br></span><
/div>
<blockquote type="cite">
<div><span class="e" id="q_1157f6712646a5a7_3">
<div><font face="Arial" size="2">Leonard, you're advice is usually much
better quality.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I regret you did not try the procedure I
outlined before you passed judgement on it. If you had tried the procedure, I
expect you would have found it works just fine for the example that was used.
</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Readers interested in the procedure outlined
below, despite Leonard's advice, can consult Sid Steward's excellent
Pdftk web site, <a onclick="return top.js.OpenExtLink(window,event,this)" href=
"http://www.accesspdf.com/" target="_blank">
www.accesspdf.com</a>, for the inspiration for the below procedure.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I hasten to add the Leonard is correct about
editing a PDF damaging it. That's why the Pdftk plugin for Vim is
used, i.e., to repair the damaged PDF. It's not a new idea, as it's
been on Sid's site since 11Feb2005,
<a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www
.accesspdf.com/index.php?page=2" target="_blank">http://www.accesspdf.com/index
.php?page=2</a>.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Best regards,</font></div>
<div><font face="Arial" size="2">Bill Segraves</font></div>
<blockquote style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px;
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">-- -- Original Message -- -- </div>
<div style="BACKGROUND: #e4e4e4; FONT: 10pt arial"><b>From:</b> <a title=
"leonardr@(protected)" onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:leonardr@(protected)" target="_blank">Leonard Rosenthol
</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a title="itext-questions@(protected)
.sourceforge.net" onclick="return top.js.OpenExtLink(window,event,this)" href=
"mailto:itext-questions@(protected)" target="_blank">Post all your
questions about iText here
</a> </div>
<div style="FONT: 10pt arial"><b>Sent:</b> Sunday, October 07, 2007 6:58 PM<
/div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re: [iText-questions] Help with
copying a page without text</div>
<div><br> </div>Note that doing so will create an invalid PDF :(.<br><br
>Please do NOT try to edit a PDF using text editors...<br><br>Leonard<br><br><br
>On Oct 7, 2007, at 11:36 AM, <a onclick="return top.js.OpenExtLink(window,event
,this)" href="mailto:wasegraves@(protected)" target="_blank">
wasegraves@(protected)</a> wrote:<br><br>> Not exactly. It's not
possible, except when it's possible.<br>><br>> Here's an approach
that works for the MyFirstTable example in the <br>> iText tutorial.
<br>><br>> 1. Download and install Vim
(This author used Vim 6.3).<br>><br>> 2.
Download and install Pdftk (This author used Pdftk 1.12), <br>> i.e.,
copy pdftk.exe into the Vim plugin directory.
<br>><br>> 3. Download and install the
Pdftk plugin in the Vim plugins <br>> directory, i.e., copy pdftk.vim
into the Vim plugin directory.<br>><br>> 4.
Open MyFirstTable.pdf with Vim.<br>><br>
> 5. Find the text "cell test2" in
the second cell in the fourth <br>> row of the table and delete the
text.<br>><br>> 6. Save the PDF as
MyFirstTable_revised.pdf.<br>><br>> 7. Open
MyFirstTable_revised.pdf with Reader and see that the
<br>> text "cell test2" is now gone.<br>><br>> Note that
this procedure uses iText indirectly, as Pdftk is based <br>> on iText
.<br>><br>> Cheers,<br>> Bill Segraves<br>><br>> -- ---- ------
Original message from Leonard Rosenthol
<br>> <<a onclick="return top.js.OpenExtLink(window,event,this)" href=
"mailto:leonardr@(protected)" target="_blank">leonardr@(protected)</a>>: --
-- ---- ----<br>><br>><br>> > No, it's not possible.
<br>> ><br>> > Nor will you find any PDF library that will offer
that due to the <br>> way<br>> > that PDF is structured. See the
other current discussion about "how<br>> > to read text on a page
"...
<br>> ><br>> ><br>> > Leonard<br>> ><br>> > On
Oct 6, 2007, at 4:28 PM, Sarath Dorbala wrote:<br>> ><br>> > >
Hello,<br>> > ><br>> > > I am pretty new to PDF and iText. I
have a situation where I need
<br>> > > to copy a page to another (new) page with no text from the
first<br>> > > page. For example, if i have a table in page 1, I need
to copy <br>> that<br>> > > to a new page and but not text in
that cell. I don't know if this
<br>> > > is possible in iText.<br>> > ><br>> > >
Thank you.<br>> <snip>< /BLOCK QUOTE><br>> -- ---- ---- -----
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- <br>> ---
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