branch: externals/cape
commit 2008d809b6414c929227cec081673f2b534824e9
Author: Daniel Mendler <[email protected]>
Commit: Daniel Mendler <[email protected]>
Add cape-capf-with-predicate
---
README.org | 1 +
cape.el | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/README.org b/README.org
index f5fa4bf10a..bc4cc5063b 100644
--- a/README.org
+++ b/README.org
@@ -129,3 +129,4 @@ achieve a similarly refreshing strategy.
- ~cape-noninterruptible-capf~: Protect a Capf which does not like to be
interrupted.
- ~cape-interactive-capf~: Create a Capf which can be called interactively.
- ~cape-capf-with-properties~: Add completion properties to a Capf.
+- ~cape-capf-with-predicate~: Add candidate predicate to a Capf.
diff --git a/cape.el b/cape.el
index 12735c1883..0c455ac020 100644
--- a/cape.el
+++ b/cape.el
@@ -796,6 +796,24 @@ completion :category symbol can be specified."
,(apply #'cape--table-with-properties table properties)
,@properties ,@plist)))))
+;;;###autoload
+(defun cape-capf-with-predicate (capf predicate)
+ "Return a new CAPF with an additional candidate PREDICATE.
+The PREDICATE is passed the candidate symbol or string."
+ (lambda ()
+ (pcase (funcall capf)
+ (`(,beg ,end ,table . ,plist)
+ `(,beg ,end ,table
+ :predicate
+ ,(if-let (pred (plist-get plist :predicate))
+ (lambda (&rest args)
+ (when (apply pred args)
+ (setq args (car args))
+ (funcall predicate (if (consp args) (car args) args))))
+ (lambda (key &optional _val)
+ (funcall predicate (if (consp key) (car key) key))))
+ ,@plist)))))
+
;;;###autoload
(defun cape-silent-capf (capf)
"Return a new CAPF which is silent (no messages, no errors)."
