bug#19270: 25.0.50; Make PDF Mode in EWW customizable

[Ivan Shmakov]

>>>>> Stefan Monnier <monnier@iro.umontreal.ca> writes:

 >> Currently EWW uses `doc-view-mode' to view PDF data.  This choice is
 >> hard-coded in `eww-display-pdf' and cannot be customized.

 > I wonder: do you sometimes prefer doc-view-mode?

 > If not, then rather than configuring EWW, you'd probably be better
 > off with a way to configure Emacs to always use my-pdf-mode for PDF
 > files.

 > IOW, maybe adding configurability to EWW is good in itself, but I
 > think your use case would be better served by a config elsewhere,
 > which would cover EWW as well as other cases where we might want to
 > view PDF files.

        How would that help if EWW will still launch doc-view-mode for
        any PDF files going through it?

        As in: M-x eww RET hello, world! RET, find some link among the
        search results, RET over it.  Now, should retrieving that link
        result in a Content-Type: application/pdf document, –
        doc-view-mode is sure to be invoked.

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