Re: Request for review `image-roll.el` for Emacs core (or ELPA)

[dalanicolai <dalanicolai@gmail.com>]

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(I should really switch to Emacs for mail, the above mail probably looks
terrible on the archive, anyway...)

As a short comment, on pdf-scroll.el. That file contains only a few lines
of 'new' code. The major part of that
file contains copies of 'original' pdf-tools function, but with some minor
modifications. I will add comments
behind the lines containing modifications.

On Mon, 18 Apr 2022 at 23:11, dalanicolai <dalanicolai@gmail.com> wrote:

> I have written a 'scroll/image roll' package that could be considered an
> extension to image-mode.
> The package provides a 'displaying' mechanism for displaying
> images/documents as a single 'virtual scroll'. The main feature/advantage
> of the package is that it allows for the 'much requested' continuous
> scrolling.
>
> In the package I have extracted (and improved) the 'display engine' (or
> whatever to call it), from some earlier experiments of implementing
> continuous scroll into doc-view and pdf-tools.
>
> The current package can be used for displaying documents like books, but
> also for displaying a selection of images. I first thought of calling it
> papyrus.el (because scroll and bookroll, would clutter too much the Emacs
> namespaces), but finally I thought, as it can be used to show images on a
> toll, and can be considered an extension to image-mode, it would be better
> to call it image-roll.el (or maybe just roll), opinions and suggestions
> about the name are very welcome.
>
> For testing, he package contains a `papyrus-demo` function that can simply
> be called after loading the package (best after starting from emacs -Q).
>  Additionally, as a final step, and as an example of how the package can
> be used, I have included an `image-roll-directory` function in the last
> section (of 38 lines only) in the file, to provide an example of how the
> package can be used to display all images within some directory on a 'roll'.
> This is only a minimal example; as this does not have my priority, I did
> not bother to make it 'fit/scale' the images.
>
> However, I have written also an extension for `pdf-tools`, that provides a
> toggle function so that users can toggle between the 'single' page
> displaying, or the `image-roll` displaying. That file can be found here
> <https://github.com/dalanicolai/pdf-tools/blob/papyrus-version/lisp/pdf-scroll.el>.
> That file can simply be downloaded and loaded (after first setting the path
> to image-roll.el at the top of the file, of course this requires pdf-tools
> to be installed).
>
> I would be happy with any feedback, and info about if and how (what is
> required) this could be added to Emacs core. If you think this package is
> not a good candidate for core (after the required modifications), then I
> would also be happy if it could be added to ELPA (although the package on
> itself is not very interesting, it should get used by 'extensions' e.g. for
> pdf-tools, dired, doc-view, djvu.el etc.).
>

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