Face Attributes with Text Properties

Question

Is there any way to have all text with a specific face also receive a specific text-property?

As a concrete example, there is a special text-property, line-prefix, that I would like to use for some face, however this is a text property, not a face attribute, so adding such a attribute to the face doesn't appear to do anything, e.g.:

(set-face-attribute 'dap-ui-verified-breakpoint-face nil
                     :weight 'bold
                     :slant 'italic
                     :line-prefix "*")

Answer 1

You can't add nonexistent face properties to faces. (You can add any properties you like to face symbols, but that's not the same thing.)

But you can add nonexistent (and existent) text properties to all (or to just some) occurrences of buffer text that has a given face.

You can do that easily with library isearch-prop.el. You can do it using command isearchp-add-prop-to-other-prop-zones:

isearchp-add-prop-to-other-prop-zones is an interactive compiled Lisp function in isearch-prop.el.

(isearchp-add-prop-to-other-prop-zones PROP-TO-ADD VALUE-TO-ADD PROP-TO-FIND VALUE-TO-FIND TYPE-TO-FIND &optional START END MSGP)

Add text property to text that has another property, from START to END.

PROP-TO-ADD and VALUE-TO-ADD are the property to add and its value.

PROP-TO-FIND, VALUE-TO-FIND, and TYPE-TO-FIND are the existing property, its value, and its type (symbol text or overlay).

START and END are the buffer limits, or the region limits if active.

Interactively, you are prompted for the required arguments.

Returns non-nil if the property was added, nil if not.

See also Isearch+.