Tabulated list image collapsing

Tabulated list image collapsing

[Thuna]

Tabulated list collapses buttons and string appropriately when the width
of the column is smaller than the width of the text.  The same can be
done with images, where if an image is wider than the column width it
can be replaced by an ellipsis to indicate collapsing (although this is
currently not the case).  The problem with this approach is that if the
image is taller than the normal text height everything jumps as the
image is collapsed.  Are there any preferred methods of dealing with
this issue or is it acceptable the way it is.

Re: Tabulated list image collapsing

[Stefan Kangas]

Thuna <thuna.cing@gmail.com> writes:

> Tabulated list collapses buttons and string appropriately when the width
> of the column is smaller than the width of the text.  The same can be
> done with images, where if an image is wider than the column width it
> can be replaced by an ellipsis to indicate collapsing (although this is
> currently not the case).

Instead of replacing the image with an ellipsis, how about just cropping
or resizing the image to fit?  I would think a small thumbnail is more
useful than an ellipsis in many cases.

> The problem with this approach is that if the
> image is taller than the normal text height everything jumps as the
> image is collapsed.  Are there any preferred methods of dealing with
> this issue or is it acceptable the way it is.

AFAIK at least, the only way to increase the line height is to have some
tall glyph on that line.

Whether the jumping is acceptable or not will depend a lot on your use
case, I think.

Re: Tabulated list image collapsing

[Thuna]

> Instead of replacing the image with an ellipsis, how about just cropping
> or resizing the image to fit?  I would think a small thumbnail is more
> useful than an ellipsis in many cases.

I have recently sent out a patch for (bug#53520) which crops the image's
width so that it fits.  An addition to it with the introduction of an
`image-resize-strategy' variable can be made with ['hide 'crop 'resize]
as the available options.

Re: Tabulated list image collapsing

[Stefan Kangas]

Thuna <thuna.cing@gmail.com> writes:

> I have recently sent out a patch for (bug#53520) which crops the image's
> width so that it fits.

Without having looked at your patch, the idea basic sounds good to me.

>   An addition to it with the introduction of an
> `image-resize-strategy' variable can be made with ['hide 'crop
> 'resize] as the available options.

Adding a buffer local `tabulated-list-image-resize-strategy' variable
sounds even better.

Re: Tabulated list image collapsing

[Robert Pluim]

>>>>> On Tue, 25 Jan 2022 04:37:21 -0600, Stefan Kangas <stefankangas@gmail.com> said:


    >> The problem with this approach is that if the
    >> image is taller than the normal text height everything jumps as the
    >> image is collapsed.  Are there any preferred methods of dealing with
    >> this issue or is it acceptable the way it is.

    Stefan> AFAIK at least, the only way to increase the line height is to have some
    Stefan> tall glyph on that line.

Or by using `line-height' or `line-spacing'. (info "(elisp) Line Height")

Robert
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