Bug 104718 - Cannot obtain linkmapping information in python/gjs
Summary: Cannot obtain linkmapping information in python/gjs
Status: RESOLVED MOVED
Alias: None
Product: poppler
Classification: Unclassified
Component: glib frontend (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: poppler-bugs
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-01-21 20:00 UTC by max
Modified: 2018-08-21 12:09 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
Python Code (1.39 KB, text/x-python)
2018-01-21 20:00 UTC, max
Details
Test pdf file (58.71 KB, application/pdf)
2018-01-21 20:01 UTC, max
Details
Vala code (1.92 KB, text/x-vala)
2018-01-21 20:02 UTC, max
Details
Test pdf latex source (886 bytes, text/x-tex)
2018-01-21 20:02 UTC, max
Details

Description max 2018-01-21 20:00:22 UTC
Created attachment 136883 [details]
Python Code

Cannot obtain information about hyperlinks on the current page using python. 

This might also be a problem with the GLib bindings. The problem appears also using gjs bindings (will not post here unless specifically required), but with C and vala it appears to work correctly.

I attach a test pdf, generated using latex with a few hyperlinks and inner-document links.

With the attached vala code, I get the following output.


$ ./mini_linkmap
gotodest: 5
link: area: 158.232000 321.926000 290.983000 333.051000
link: 5 t: (null) u: https://gitlab.gnome.org/GNOME/pygobject
link: area: 398.028000 333.605000 478.476000 345.560000
link: 5 t: (null) u: https://gitlab.gnome.org/GNOME/pygobject
link: area: 258.578000 353.530000 427.942000 365.485000
link: 5 t: (null) u: https://poppler.freedesktop.org/
link: area: 132.772000 408.573000 218.450000 419.698000
link: 5 t: (null) u: https://poppler.freedesktop.org/
link: area: 392.798000 420.529000 478.476000 431.653000
link: 5 t: (null) u: https://poppler.freedesktop.org/
link: area: 435.948000 446.653000 442.922000 455.066000
   dest type 2 page 0 a: 0.000000 0.000000 0.000000 0.000000 z: 0.000000 n: cite.Random 
link: area: 383.416000 511.438000 390.390000 522.286000
   dest type 2 page 0 a: 0.000000 0.000000 0.000000 0.000000 z: 0.000000 n: section.1 


The python code should give a similar output. However, The URI strings are returned empty.

$ ./mini_linkmap.py crash2
link: area: 158.232000 321.926000 158.232000 333.051000
action type: uri
title: None
uri: ''
link: area: 398.028000 333.605000 398.028000 345.560000
action type: uri
title: None
uri: ''
link: area: 258.578000 353.530000 258.578000 365.485000
action type: uri
title: None
uri: ''
link: area: 132.772000 408.573000 132.772000 419.698000
action type: uri
title: None
uri: ''
link: area: 392.798000 420.529000 392.798000 431.653000
action type: uri
title: None
uri: ''
link: area: 435.948000 446.653000 435.948000 455.066000
action type: 2 goto_dest page 0 a: (0.0, 0.0, 0.0, 0.0) z: 0.0 dest type: <enum 31335872 of type Poppler.DestType>
link: area: 383.416000 511.438000 383.416000 522.286000
action type: 2 goto_dest page 0 a: (0.0, 0.0, 0.0, 0.0) z: 0.0 dest type: <enum 31337472 of type Poppler.DestType>




If the goto_dest named_dest string is queried, even the python interpreter crashes most times and sometimes yields garbage.

$ ./mini_linkmap.py crash
link: area: 158.232000 321.926000 158.232000 333.051000
action type: uri
link: area: 398.028000 333.605000 398.028000 345.560000
action type: uri
link: area: 258.578000 353.530000 258.578000 365.485000
action type: uri
link: area: 132.772000 408.573000 132.772000 419.698000
action type: uri
link: area: 392.798000 420.529000 392.798000 431.653000
action type: uri
link: area: 435.948000 446.653000 435.948000 455.066000
action type: 2 goto_dest page 0 a: (0.0, 0.0, 0.0, 0.0) z: 0.0 dest type: <enum 28583360 of type Poppler.DestType>
**
ERROR:../../gi/pygi-argument.c:1004:_pygi_argument_to_object: code should not be reached
Aborted

Example of random garbage:

$ ./mini_linkmap.py crash
link: area: 158.232000 321.926000 158.232000 333.051000
action type: uri
link: area: 398.028000 333.605000 398.028000 345.560000
action type: uri
link: area: 258.578000 353.530000 258.578000 365.485000
action type: uri
link: area: 132.772000 408.573000 132.772000 419.698000
action type: uri
link: area: 392.798000 420.529000 392.798000 431.653000
action type: uri
link: area: 435.948000 446.653000 435.948000 455.066000
action type: 2 goto_dest page 0 a: (0.0, 0.0, 0.0, 0.0) z: 0.0 dest type: <enum 24778176 of type Poppler.DestType>
title: None n: 0ƈ
link: area: 383.416000 511.438000 383.416000 522.286000
action type: 2 goto_dest page 0 a: (0.0, 0.0, 0.0, 0.0) z: 0.0 dest type: <enum 24779840 of type Poppler.DestType>
title: None n: 0ƈ
Comment 1 max 2018-01-21 20:01:23 UTC
Created attachment 136884 [details]
Test pdf file
Comment 2 max 2018-01-21 20:02:00 UTC
Created attachment 136885 [details]
Vala code

Vala code compiled using

valac --pkg poppler-glib --pkg gtk+-3.0 -o mini_linkmap mini_linkmap.vala
Comment 3 max 2018-01-21 20:02:31 UTC
Created attachment 136886 [details]
Test pdf latex source

Compile using `pdflatex hyperlinks.tex`
Comment 4 max 2018-01-21 20:05:31 UTC
Note also the garbage returned for the desttype enum.
Comment 5 Daniel Stone 2018-08-21 12:09:22 UTC
Sorry, but for some reason Bugzilla failed to generate valid XML to export this bug when migrating to GitLab. As a result we've been unable to duplicate it there. Please file a new issue on https://gitlab.freedesktop.org/poppler/poppler/issues/new/ referencing this one. Thanks, and sorry again for the inconvenience.


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