GNU bug report logs - #28503
25.3; buffer-file-name returns nil in eww-pdfs

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From: Alex Branham <alex.branham <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 28503 <at> debbugs.gnu.org
Subject: bug#28503: 25.3; buffer-file-name returns nil in eww-pdfs
Date: Mon, 18 Sep 2017 20:33:31 -0500

But in a "normal" doc-view (ie one that's just visiting a file in your home dir), doc-view--buffer-file-name will return the file name even though the buffer is displaying the png, right? From the docstring:

The file name used for conversion.  Normally it’s the same as
‘buffer-file-name’...


On Tue 19 Sep 2017 at 00:40, Glenn Morris <rgm <at> gnu.org> wrote:

> Alex Branham wrote:
>
>> M-x eww
>> (navigate to a pdf, I found this by searching "pdf test page"): http://www.orimi.com/pdf-test.pdf
>>
>> then eval (buffer-file-name)
>>
>> For me, it returns nil even though the pdf is a file on my computer (somewhere in /tmp for me).
>
> For me, the pdf is displayed using Emacs's Doc View mode.
> This converts the pdf to a png and displays the png.
> So you aren't viewing the actual pdf file, you can't edit it, etc.
> So I don't think it would make sense to set buffer-file-name as if you were.
> (There is doc-view--buffer-file-name, an internal variable.)

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