Isearch hit count. (Bug#29321)

* lisp/isearch.el (isearch-lazy-count): New defcustom.
(lazy-count): New defgroup.
(lazy-count-prefix-format, lazy-count-suffix-format): New defcustom.
(isearch-lazy-count-format): New function.
(isearch-message-prefix, isearch-message-suffix): Use it.
(isearch-lazy-highlight-window-start-changed)
(isearch-lazy-highlight-window-end-changed)
(isearch-lazy-count-current, isearch-lazy-count-total)
(isearch-lazy-count-hash): New variables.
(isearch-lazy-highlight-new-loop): Reset isearch-lazy-count-total
and update isearch-lazy-count-current for isearch-message.
(isearch-lazy-highlight-update): Run full-buffer loop for
isearch-lazy-count.
(isearch-lazy-highlight-buffer-update): Count isearch-lazy-count-total.
Set isearch-lazy-count-current at the end.

1 files changed, 6 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index dff7c5d0d5f..76531f288ff 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -621,6 +621,12 @@ can now be searched via 'C-s'.
 
 ** Search and Replace
 
+*** isearch-lazy-count shows the current match number and total number
+of matches in the Isearch prompt.  Customizable variables
+lazy-count-prefix-format and lazy-count-suffix-format define the
+format of the current and the total number of matches in the prompt's
+prefix and suffix respectively.
+
 *** lazy-highlight-buffer highlights matches in the full buffer.
 It is useful in combination with lazy-highlight-cleanup customized to nil
 to leave matches highlighted in the whole buffer after exiting isearch.