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Add support for column background colors in vtable

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* doc/misc/vtable.texi (Making A Table): Document it.

* lisp/emacs-lisp/vtable.el (vtable): Add a column color element.
(make-vtable): Use it.
(vtable--insert-line): Insert the colors here.
This commit is contained in:
Lars Ingebrigtsen 2022-04-13 16:25:52 +02:00
parent e14e5dff2c
commit 29fae93d1c
2 changed files with 18 additions and 3 deletions
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15
lisp/emacs-lisp/vtable.el
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@ -57,6 +57,7 @@
(separator-width :initarg :separator-width :accessor vtable-separator-width)
(sort-by :initarg :sort-by :accessor vtable-sort-by)
(ellipsis :initarg :ellipsis :accessor vtable-ellipsis)
(column-colors :initarg :column-colors :accessor vtable-column-colors)
(-cache :initform (make-hash-table :test #'equal)))
"A object to hold the data for a table.")
@ -83,7 +84,8 @@
(separator-width 1)
sort-by
(ellipsis t)
(insert t))
(insert t)
column-colors)
"Create and insert a vtable at point.
The vtable object is returned. If INSERT is nil, the table won't
be inserted."
@ -122,6 +124,7 @@ be inserted."
:keymap keymap
:separator-width separator-width
:sort-by sort-by
:column-colors column-colors
:ellipsis ellipsis)))
;; Compute missing column data.
(setf (vtable-columns table) (vtable--compute-columns table))
@ -377,7 +380,8 @@ This also updates the displayed table."
(defun vtable--insert-line (table line widths spacer
&optional ellipsis ellipsis-width)
(let ((start (point))
(columns (vtable-columns table)))
(columns (vtable-columns table))
(colors (vtable-column-colors table)))
(seq-do-indexed
(lambda (elem index)
(let ((value (nth 0 elem))
@ -438,7 +442,12 @@ This also updates the displayed table."
(propertize " " 'display
(list 'space
:width (list spacer)))))
(put-text-property start (point) 'vtable-column index))))
(put-text-property start (point) 'vtable-column index)
(when colors
(add-face-text-property
start (point)
(list :background
(elt colors (mod index (length colors)))))))))
(cdr line))
(insert "\n")
(put-text-property start (point) 'vtable-object (car line))))