branch: master
commit d1cec26ffa1843d05a1d3053aaf40d771c1223c3
Author: Michael Heerdegen <michael_heerde...@web.de>
Commit: Michael Heerdegen <michael_heerde...@web.de>
[el-search] Improvise eldoc support for search pattern prompt
* packages/el-search/el-search.el
(el-search-eldoc-documentation-function): New function.
(el-search-read-pattern-setup-mb): Install
'el-search-eldoc-documentation-function' buffer-locally.
---
packages/el-search/el-search.el | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/packages/el-search/el-search.el b/packages/el-search/el-search.el
index 229a8a1..d671e0c 100644
--- a/packages/el-search/el-search.el
+++ b/packages/el-search/el-search.el
@@ -948,6 +948,29 @@ nil."
(timer-set-time el-search--mb-hints-timer (time-add (current-time)
el-search-mb-hints-delay))
(timer-activate el-search--mb-hints-timer)))
+(defun el-search-eldoc-documentation-function ()
+ (when (catch 'result
+ (save-excursion
+ (while (condition-case nil
+ (progn (backward-up-list)
+ (if (el-search-looking-at '`(,(or 'pred 'guard)
. ,_))
+ (throw 'result nil)
+ t))
+ (scan-error nil)))
+ t))
+ (pcase-let (((and current-fsym `(,fnsym ,index))
+ (elisp--fnsym-in-current-sexp)))
+ (defvar el-search--pcase-macros) ;defined later
+ (let (pattern-def docstring help)
+ (and fnsym
+ (setq pattern-def (cdr (assoc fnsym el-search--pcase-macros)))
+ ;; This is what `elisp-get-fnsym-args-string' (which we can't
use) does
+ (setq docstring (documentation pattern-def))
+ (setq help (help-split-fundoc docstring fnsym))
+ (elisp--highlight-function-argument
+ current-fsym (elisp-function-argstring (car help))
+ index (concat (symbol-name fnsym) ": ")))))))
+
(defvar el-search--this-session-match-count-data nil)
(defun el-search-read-pattern-setup-mb ()
@@ -958,7 +981,9 @@ nil."
(setq el-search--this-session-match-count-data nil)
(when (timerp el-search--mb-hints-timer) (cancel-timer
el-search--mb-hints-timer))
(setq el-search--mb-hints-timer nil)
- (add-hook 'post-command-hook #'el-search-read-pattern-trigger-mb-hints t
t)))
+ (add-hook 'post-command-hook #'el-search-read-pattern-trigger-mb-hints t
t))
+ (add-function :before-until (local 'eldoc-documentation-function)
+ #'el-search-eldoc-documentation-function))
(defvar el-search--search-pattern-1-do-fun nil)
(defvar el-search--busy-animation
