Function: isearch-lazy-highlight-new-loop
isearch-lazy-highlight-new-loop is a byte-compiled function defined in
isearch.el.gz.
Signature
(isearch-lazy-highlight-new-loop &optional BEG END)
Documentation
Cleanup any previous lazy-highlight loop and begin a new one.
BEG and END specify the bounds within which highlighting should occur.
This is called when isearch-update is invoked (which can cause the
search string to change or the window to scroll). It is also used
by other Emacs features.
Source Code
;; Defined in /usr/src/emacs/lisp/isearch.el.gz
(defun isearch-lazy-highlight-new-loop (&optional beg end)
"Cleanup any previous `lazy-highlight' loop and begin a new one.
BEG and END specify the bounds within which highlighting should occur.
This is called when `isearch-update' is invoked (which can cause the
search string to change or the window to scroll). It is also used
by other Emacs features."
(when (and (null executing-kbd-macro)
(sit-for 0) ;make sure (window-start) is credible
(or (not (equal isearch-string
isearch-lazy-highlight-last-string))
(not (memq (selected-window)
isearch-lazy-highlight-window-group))
(not (eq isearch-lazy-highlight-case-fold-search
isearch-case-fold-search))
(not (eq isearch-lazy-highlight-regexp
isearch-regexp))
(not (eq isearch-lazy-highlight-regexp-function
isearch-regexp-function))
(not (eq isearch-lazy-highlight-lax-whitespace
isearch-lax-whitespace))
(not (eq isearch-lazy-highlight-regexp-lax-whitespace
isearch-regexp-lax-whitespace))
(not (eq isearch-forward
isearch-lazy-highlight-forward))
;; In case we are recovering from an error.
(not (equal isearch-error
isearch-lazy-highlight-error))
(if lazy-highlight-buffer
(not (= (point-min)
isearch-lazy-highlight-point-min))
(setq isearch-lazy-highlight-window-start-changed
(not (= (window-group-start)
isearch-lazy-highlight-window-start))))
(if lazy-highlight-buffer
(not (= (point-max)
isearch-lazy-highlight-point-max))
(setq isearch-lazy-highlight-window-end-changed
(not (= (window-group-end) ; Window may have been split/joined.
isearch-lazy-highlight-window-end))))))
;; something important did indeed change
(lazy-highlight-cleanup t (not (equal isearch-string ""))) ;stop old timer
(when (and isearch-lazy-count isearch-mode (null isearch-message-function))
(when (or (equal isearch-string "")
;; Check if this place was reached by a condition above
;; other than changed window boundaries (that shouldn't
;; reset the counter)
(and (not isearch-lazy-highlight-window-start-changed)
(not isearch-lazy-highlight-window-end-changed))
;; Also check for changes in buffer boundaries in
;; a possibly narrowed buffer in case lazy-highlight-buffer
;; is nil, thus the same check was not performed above
(not (= (point-min)
isearch-lazy-highlight-point-min))
(not (= (point-max)
isearch-lazy-highlight-point-max)))
;; Reset old counter before going to count new numbers
(clrhash isearch-lazy-count-hash)
(setq isearch-lazy-count-current nil
isearch-lazy-count-total nil)
;; Delay updating the message if possible, to avoid flicker
(when (string-equal isearch-string "") (isearch-message))))
(setq isearch-lazy-highlight-window-start-changed nil)
(setq isearch-lazy-highlight-window-end-changed nil)
(setq isearch-lazy-highlight-error isearch-error)
;; It used to check for `(not isearch-error)' here, but actually
;; lazy-highlighting might find matches to highlight even when
;; `isearch-error' is non-nil. (Bug#9918)
(setq isearch-lazy-highlight-start-limit beg
isearch-lazy-highlight-end-limit end)
(setq isearch-lazy-highlight-window (selected-window)
isearch-lazy-highlight-window-group (selected-window-group)
isearch-lazy-highlight-window-start (window-group-start)
isearch-lazy-highlight-window-end (window-group-end)
isearch-lazy-highlight-point-min (point-min)
isearch-lazy-highlight-point-max (point-max)
isearch-lazy-highlight-buffer lazy-highlight-buffer
;; Start lazy-highlighting at the beginning of the found
;; match (`isearch-other-end'). If no match, use point.
;; One of the next two variables (depending on search direction)
;; is used to define the starting position of lazy-highlighting
;; and also to remember the current position of point between
;; calls of `isearch-lazy-highlight-update', and another variable
;; is used to define where the wrapped search must stop.
isearch-lazy-highlight-start (or isearch-other-end (point))
isearch-lazy-highlight-end (or isearch-other-end (point))
isearch-lazy-highlight-wrapped nil
isearch-lazy-highlight-last-string isearch-string
isearch-lazy-highlight-case-fold-search isearch-case-fold-search
isearch-lazy-highlight-regexp isearch-regexp
isearch-lazy-highlight-lax-whitespace isearch-lax-whitespace
isearch-lazy-highlight-regexp-lax-whitespace isearch-regexp-lax-whitespace
isearch-lazy-highlight-regexp-function isearch-regexp-function
isearch-lazy-highlight-forward isearch-forward)
;; Extend start/end to match whole string at point (bug#19353)
(if isearch-lazy-highlight-forward
(setq isearch-lazy-highlight-start
(min (+ isearch-lazy-highlight-start
(1- (length isearch-lazy-highlight-last-string)))
(point-max)))
(setq isearch-lazy-highlight-end
(max (- isearch-lazy-highlight-end
(1- (length isearch-lazy-highlight-last-string)))
(point-min))))
(unless (equal isearch-string "")
(setq isearch-lazy-highlight-timer
(run-with-idle-timer (if (>= (length isearch-string)
lazy-highlight-no-delay-length)
0
lazy-highlight-initial-delay)
nil
'isearch-lazy-highlight-start))))
;; Update the current match number only in isearch-mode and
;; unless isearch-mode is used specially with isearch-message-function
(when (and isearch-lazy-count isearch-mode (null isearch-message-function))
;; Update isearch-lazy-count-current only when it was already set
;; at the end of isearch-lazy-highlight-buffer-update
(when isearch-lazy-count-current
(setq isearch-lazy-count-current
(gethash (point) isearch-lazy-count-hash 0))
(isearch-message))))