Re: [PATCH] Justify/align image previews in org-mode

[Ihor Radchenko]

Karthik Chikmagalur <karthikchikmagalur@gmail.com> writes:

> Please ignore the previous patch and use this one instead.  I've fixed a
> bug and a couple of formatting errors.

Thanks for the patch!
See my comments inline.

> +(defcustom org-image-align nil
> +  "How to align images previewed using `org-display-inline-images'.
> +
> +Only stand-alone image links are affected by this setting.  These
> +are links without surrounding text.
> +
> +Possible values of this option are:
> +
> +nil      Insert image at specified position (same as left-alignment).

It would make sense to allow 'left value as well (same as nil).

> +                              (when align
> +                                (overlay-put
> +                                 ov 'before-string
> +                                 (propertize
> +                                  " " 'face 'default
> +                                  'display
> +                                  (pcase align
> +                                    ((or 'center 'justify)

I do not think that we need to consider 'justify value at this point.
Maybe in future, when (or if) we add proper justification support to
text. But not now.

> +(defun org-image--align (link)
> +  "Determine the alignment of the image link.
> +
> +This is controlled globally by the option `org-image-align', and
> +per image by the value of `:align' in the affiliated keyword
> +`#+attr_org'.
> +
> +The result is one of the symbols center, justify or right.  The
> +first two will cause the image preview to be centered, the last
> +will cause it to be right-aligned.  A return value of nil implies
> +no special alignment -- the image preview is overlaid on the link
> +exactly where it appears in the buffer."
> +  (let ((par (org-element-lineage link 'paragraph)))
> +    ;; Only apply when image is not surrounded by paragraph text:
> +    (when (and (= (org-element-property :begin link)
> +                  (org-element-property :contents-begin par))
> +               (<= (- (org-element-property :contents-end par)
> +                      (org-element-property :end link))
> +                   1))                  ;account for trailing newline

This will not work when the image paragraph is indented:

* This is test
  #+attr_org: :align center
  [[file:~/Downloads/wallpaper.png]]

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
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