[poppler] find all text

[oh.hello.joe at gmail.com]

Is there a function to get a rectangle containing all the text on the page?
This could be useful for a pdf viewer to zoom in enough so that the margins
are out of view but the text is as large as possible while still being in
view.

I notice that the glib interface has poppler_page_find_text return a list of
rectangles
where a string occurs. It throws an assertion failure if you give it NULL
for a string.  It
could be altered to accept NULL and return a single rectangle that includes
all the
text by searching for "".

My main interest is not really text neccessarily, but to add an automatic
crop the
margin feature to a pdf viewer.
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