I've been looking a little into implementing generic text and image overlay for
an existing PDF and output that as a new pdf.
Besides needing a PdfStamper instead of a PdfWriter, there are some design
issues to be made afaics.
We could stil use the p:document as a base tag and add a overlay tag in that
this overlay tag could take a file/url/... as an attribute and within that
overlay tag we could allow a basic set of tags like page to select on which
page to do overlay and within that tag we could allow text and image with
postition, size, font etc to do basic things. An example for overlay would be:
| <p:document>
| <p:overlay src="/pdf/myExistingPdf.pdf">
| <p:page number="1">
| <p:text top="100" left="100" fontsize="10"
fonttype="....">Hi, I'm overlayed text\n #{user.name} did this</p:text>
| </p:page>
| <p:page number="3">
| <p:image src="/jboss.jpg" top="225" left="150" />
| </p:page>
| </p:overlay>
| </p:document>
|
or for filling out forms:
<p:document>
| <p:form name="formId" flatten="true">
| <p:formElement name="name">#{formBean.name}</p:formElement>
| <p:formElement name="address" value="Address" />
| <p:formElement name="city" value="#{formBean.city}" />
| <p:formElement name="country">The Netherlands</p:formElement>
| </p:form>
| </p:document>
Although the name attribute on the form element seems not to be needed (no
examples with more than one form in a pdf and no api call to retrieve a
specific form so there probably never is one)
The 'flatten' attribute makes the document loose all it's input fields and just
render as text (where should its' default be?)
Any other suggestions?
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