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swiper.el
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swiper.el
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;;; swiper.el --- Isearch with an overview. Oh, man! -*- lexical-binding: t -*-
;; Copyright (C) 2015-2018 Free Software Foundation, Inc.
;; Author: Oleh Krehel <ohwoeowho@gmail.com>
;; URL: https://github.com/abo-abo/swiper
;; Version: 0.12.0
;; Package-Requires: ((emacs "24.1") (ivy "0.12.0"))
;; Keywords: matching
;; This file is part of GNU Emacs.
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; For a full copy of the GNU General Public License
;; see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This package gives an overview of the current regex search
;; candidates. The search regex can be split into groups with a
;; space. Each group is highlighted with a different face.
;;
;; It can double as a quick `regex-builder', although only single
;; lines will be matched.
;;; Code:
(require 'ivy)
(defgroup swiper nil
"`isearch' with an overview."
:group 'matching
:prefix "swiper-")
(defface swiper-match-face-1
'((t (:inherit lazy-highlight)))
"The background face for `swiper' matches."
:group 'ivy-faces)
(defface swiper-match-face-2
'((t (:inherit isearch)))
"Face for `swiper' matches modulo 1."
:group 'ivy-faces)
(defface swiper-match-face-3
'((t (:inherit match)))
"Face for `swiper' matches modulo 2."
:group 'ivy-faces)
(defface swiper-match-face-4
'((t (:inherit isearch-fail)))
"Face for `swiper' matches modulo 3."
:group 'ivy-faces)
(defface swiper-background-match-face-1
'((t (:inherit swiper-match-face-1)))
"The background face for non-current `swiper' matches."
:group 'ivy-faces)
(defface swiper-background-match-face-2
'((t (:inherit swiper-match-face-2)))
"Face for non-current `swiper' matches modulo 1."
:group 'ivy-faces)
(defface swiper-background-match-face-3
'((t (:inherit swiper-match-face-3)))
"Face for non-current `swiper' matches modulo 2."
:group 'ivy-faces)
(defface swiper-background-match-face-4
'((t (:inherit swiper-match-face-4)))
"Face for non-current `swiper' matches modulo 3."
:group 'ivy-faces)
(defface swiper-line-face
'((t (:inherit highlight)))
"Face for current `swiper' line."
:group 'ivy-faces)
(defcustom swiper-faces '(swiper-match-face-1
swiper-match-face-2
swiper-match-face-3
swiper-match-face-4)
"List of `swiper' faces for group matches."
:group 'ivy-faces
:type '(repeat face))
(defvar swiper-background-faces
'(swiper-background-match-face-1
swiper-background-match-face-2
swiper-background-match-face-3
swiper-background-match-face-4)
"Like `swiper-faces', but used for all matches except the current one.")
(defun swiper--recompute-background-faces ()
(let ((faces '(swiper-background-match-face-1
swiper-background-match-face-2
swiper-background-match-face-3
swiper-background-match-face-4))
(colir-compose-method #'colir-compose-soft-light))
(cl-mapc (lambda (f1 f2)
(let ((bg (face-background f1)))
(when bg
(set-face-background
f2
(colir-blend
(colir-color-parse bg)
(colir-color-parse "#ffffff"))))))
swiper-faces
faces)))
(swiper--recompute-background-faces)
(defcustom swiper-min-highlight 2
"Only highlight matches for regexps at least this long."
:type 'integer)
(defcustom swiper-include-line-number-in-search nil
"Include line number in text of search candidates."
:type 'boolean
:group 'swiper)
(defcustom swiper-goto-start-of-match nil
"When non-nil, go to the start of the match, not its end.
Treated as non-nil when searching backwards."
:type 'boolean
:group 'swiper)
(defvar swiper-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "M-q") 'swiper-query-replace)
(define-key map (kbd "C-l") 'swiper-recenter-top-bottom)
(define-key map (kbd "C-'") 'swiper-avy)
(define-key map (kbd "C-7") 'swiper-mc)
(define-key map (kbd "C-c C-f") 'swiper-toggle-face-matching)
map)
"Keymap for swiper.")
(defvar swiper--query-replace-overlays nil)
(defun swiper--query-replace-updatefn ()
(let ((lisp (ignore-errors (nth 2 (query-replace-compile-replacement ivy-text t)))))
(dolist (ov swiper--query-replace-overlays)
(when lisp
(dolist (x (overlay-get ov 'matches))
(setq lisp (cl-subst (cadr x) (car x) lisp :test #'equal)))
(setq lisp (ignore-errors (eval lisp))))
(overlay-put
ov 'after-string
(propertize
(if (stringp lisp)
lisp
ivy-text)
'face 'error)))))
(defun swiper--query-replace-cleanup ()
(while swiper--query-replace-overlays
(delete-overlay (pop swiper--query-replace-overlays))))
(defun swiper--query-replace-setup ()
(with-ivy-window
(let ((end (window-end (selected-window) t))
(re (ivy--regex ivy-text)))
(save-excursion
(goto-char (window-start))
(while (re-search-forward re end t)
(let ((ov (make-overlay (1- (match-end 0)) (match-end 0)))
(md (match-data)))
(overlay-put
ov 'matches
(mapcar
(lambda (x)
(list `(match-string ,x) (match-string x)))
(number-sequence 0 (1- (/ (length md) 2)))))
(push ov swiper--query-replace-overlays)))))))
(defun swiper-query-replace ()
"Start `query-replace' with string to replace from last search string."
(interactive)
(cond ((null (window-minibuffer-p))
(user-error "Should only be called in the minibuffer through `swiper-map'"))
((string= "" ivy-text)
(user-error "Empty input"))
(t
(swiper--query-replace-setup)
(unwind-protect
(let* ((enable-recursive-minibuffers t)
(from (ivy--regex ivy-text))
(default
(format "\\,(concat %s)"
(if (<= ivy--subexps 1)
"\\&"
(mapconcat (lambda (i) (format "\\%d" i))
(number-sequence 1 ivy--subexps)
" \" \" "))))
(to
(query-replace-compile-replacement
(ivy-read
(format "Query replace %s with: " from) nil
:def default
:update-fn #'swiper--query-replace-updatefn)
t)))
(swiper--cleanup)
(ivy-exit-with-action
(lambda (_)
(with-ivy-window
(move-beginning-of-line 1)
(let ((inhibit-read-only t))
(perform-replace from to
t t nil))))))
(swiper--query-replace-cleanup)))))
(defvar inhibit-message)
(defun swiper-all-query-replace ()
"Start `query-replace' with string to replace from last search string."
(interactive)
(if (null (window-minibuffer-p))
(user-error
"Should only be called in the minibuffer through `swiper-all-map'")
(let* ((enable-recursive-minibuffers t)
(from (ivy--regex ivy-text))
(to (query-replace-read-to from "Query replace" t)))
(swiper--cleanup)
(ivy-exit-with-action
(lambda (_)
(let ((wnd-conf (current-window-configuration))
(inhibit-message t))
(unwind-protect
(dolist (cand ivy--old-cands)
(let ((buffer (get-text-property 0 'buffer cand)))
(switch-to-buffer buffer)
(goto-char (point-min))
(perform-replace from to t t nil)))
(set-window-configuration wnd-conf))))))))
(defvar avy-all-windows)
(defvar avy-style)
(defvar avy-keys)
(declare-function avy--overlay-post "ext:avy")
(declare-function avy-action-goto "ext:avy")
(declare-function avy-candidate-beg "ext:avy")
(declare-function avy--done "ext:avy")
(declare-function avy--make-backgrounds "ext:avy")
(declare-function avy-window-list "ext:avy")
(declare-function avy-read "ext:avy")
(declare-function avy-read-de-bruijn "ext:avy")
(declare-function avy-tree "ext:avy")
(declare-function avy-push-mark "ext:avy")
(declare-function avy--remove-leading-chars "ext:avy")
(defun swiper--avy-candidates ()
(let* (
;; We'll have overlapping overlays, so we sort all the
;; overlays in the visible region by their start, and then
;; throw out non-Swiper overlays or overlapping Swiper
;; overlays.
(visible-overlays (cl-sort (with-ivy-window
(overlays-in (window-start)
(window-end)))
#'< :key #'overlay-start))
(min-overlay-start 0)
(overlays-for-avy
(cl-remove-if-not
(lambda (ov)
(when (and (>= (overlay-start ov)
min-overlay-start)
(memq (overlay-get ov 'face)
(append swiper-faces swiper-background-faces)))
(setq min-overlay-start (overlay-start ov))))
visible-overlays))
(offset (if (eq (ivy-state-caller ivy-last) 'swiper) 1 0)))
(nconc
(mapcar (lambda (ov)
(cons (overlay-start ov)
(overlay-get ov 'window)))
overlays-for-avy)
(save-excursion
(save-restriction
(narrow-to-region (window-start) (window-end))
(goto-char (point-min))
(forward-line)
(let ((win (selected-window))
cands)
(while (not (eobp))
(push (cons (+ (point) offset) win)
cands)
(forward-line))
cands))))))
(defun swiper--avy-candidate ()
(let ((candidates (swiper--avy-candidates))
(avy-all-windows nil))
(unwind-protect
(prog2
(avy--make-backgrounds
(append (avy-window-list)
(list (ivy-state-window ivy-last))))
(if (eq avy-style 'de-bruijn)
(avy-read-de-bruijn candidates avy-keys)
(avy-read (avy-tree candidates avy-keys)
#'avy--overlay-post
#'avy--remove-leading-chars))
(avy-push-mark))
(avy--done))))
(defun swiper--avy-goto (candidate)
(cond ((let ((win (cdr-safe candidate)))
(and win (window-minibuffer-p win)))
(let ((nlines (count-lines (point-min) (point-max))))
(ivy-set-index
(+ (car (ivy--minibuffer-index-bounds
ivy--index ivy--length ivy-height))
(line-number-at-pos (car candidate))
(if (or (= nlines (1+ ivy-height))
(< ivy--length ivy-height))
0
(- ivy-height nlines))
-2)))
(ivy--exhibit)
(ivy-done)
(ivy-call))
((or (consp candidate)
(number-or-marker-p candidate))
(ivy-quit-and-run
(avy-action-goto (avy-candidate-beg candidate))))))
;;;###autoload
(defun swiper-avy ()
"Jump to one of the current swiper candidates."
(interactive)
(unless (require 'avy nil 'noerror)
(error "Package avy isn't installed"))
(cl-case (length ivy-text)
(0
(user-error "Need at least one char of input"))
(1
(let ((swiper-min-highlight 1))
(swiper--update-input-ivy))))
(swiper--avy-goto (swiper--avy-candidate)))
(declare-function mc/create-fake-cursor-at-point "ext:multiple-cursors-core")
(declare-function multiple-cursors-mode "ext:multiple-cursors-core")
(defun swiper-mc ()
"Create a fake cursor for each `swiper' candidate.
Make sure `swiper-mc' is on `mc/cmds-to-run-once' list."
(interactive)
(unless (require 'multiple-cursors nil t)
(error "Multiple-cursors isn't installed"))
(unless (window-minibuffer-p)
(error "Call me only from `swiper'"))
(let ((cands (nreverse ivy--old-cands))
(action (ivy--get-action ivy-last)))
(unless (string= ivy-text "")
(ivy-exit-with-action
(lambda (_)
(let (cand)
(while (setq cand (pop cands))
(funcall action cand)
(when cands
(mc/create-fake-cursor-at-point))))
(multiple-cursors-mode 1))))))
(defun swiper-recenter-top-bottom (&optional arg)
"Call (`recenter-top-bottom' ARG)."
(interactive "P")
(with-ivy-window
(recenter-top-bottom arg)))
(defvar swiper-font-lock-exclude
'(Man-mode
adoc-mode
bbdb-mode
bongo-library-mode
bongo-mode
bongo-playlist-mode
bookmark-bmenu-mode
circe-channel-mode
circe-query-mode
circe-server-mode
deadgrep-mode
debbugs-gnu-mode
dired-mode
elfeed-search-mode
elfeed-show-mode
emms-playlist-mode
emms-stream-mode
erc-mode
eshell-mode
eww-mode
forth-block-mode
forth-mode
fundamental-mode
gnus-article-mode
gnus-group-mode
gnus-summary-mode
help-mode
helpful-mode
jabber-chat-mode
magit-popup-mode
matrix-client-mode
matrix-client-room-list-mode
mu4e-headers-mode
mu4e-view-mode
nix-mode
notmuch-search-mode
notmuch-tree-mode
occur-edit-mode
occur-mode
org-agenda-mode
package-menu-mode
rcirc-mode
sauron-mode
treemacs-mode
twittering-mode
vc-dir-mode
w3m-mode
woman-mode
xref--xref-buffer-mode)
"List of major-modes that are incompatible with `font-lock-ensure'.")
(defun swiper-font-lock-ensure-p ()
"Return non-nil if we should `font-lock-ensure'."
(or (derived-mode-p 'magit-mode)
(bound-and-true-p magit-blame-mode)
(memq major-mode swiper-font-lock-exclude)
(not (derived-mode-p 'prog-mode))))
(defun swiper-font-lock-ensure ()
"Ensure the entired buffer is highlighted."
(unless (swiper-font-lock-ensure-p)
(unless (or (> (buffer-size) 100000) (null font-lock-mode))
(if (fboundp 'font-lock-ensure)
(font-lock-ensure)
(with-no-warnings (font-lock-fontify-buffer))))))
(defvar swiper--format-spec ""
"Store the current candidates format spec.")
(defvar swiper--width nil
"Store the number of digits needed for the longest line nubmer.")
(defvar swiper-use-visual-line nil
"When non-nil, use `line-move' instead of `forward-line'.")
(defvar dired-isearch-filenames)
(declare-function dired-move-to-filename "dired")
(defun swiper--line ()
(let* ((beg (cond ((and (eq major-mode 'dired-mode)
(bound-and-true-p dired-isearch-filenames))
(dired-move-to-filename)
(point))
(swiper-use-visual-line
(save-excursion
(beginning-of-visual-line)
(point)))
(t
(point))))
(end (if swiper-use-visual-line
(save-excursion
(end-of-visual-line)
(point))
(line-end-position))))
(concat
" "
(buffer-substring beg end))))
(declare-function outline-show-all "outline")
(defvar swiper-use-visual-line-p
(lambda (n-lines)
(and visual-line-mode
;; super-slow otherwise
(< (buffer-size) 20000)
(< n-lines 400)))
"A predicate that decides whether `line-move' or `forward-line' is used.
Note that `line-move' can be very slow.")
(defun swiper--candidates (&optional numbers-width)
"Return a list of this buffer lines.
NUMBERS-WIDTH, when specified, is used for width spec of line
numbers; replaces calculating the width from buffer line count."
(let* ((inhibit-field-text-motion t)
(n-lines (count-lines (point-min) (point-max))))
(if (funcall swiper-use-visual-line-p n-lines)
(progn
(when (eq major-mode 'org-mode)
(require 'outline)
(if (fboundp 'outline-show-all)
(outline-show-all)
(with-no-warnings
(show-all))))
(setq swiper-use-visual-line t))
(setq swiper-use-visual-line nil))
(unless (zerop n-lines)
(setq swiper--width (or numbers-width
(1+ (floor (log n-lines 10)))))
(setq swiper--format-spec
(format "%%-%dd " swiper--width))
(let ((line-number 1)
(advancer (if swiper-use-visual-line
(lambda (arg) (line-move arg t))
#'forward-line))
candidates)
(save-excursion
(goto-char (point-min))
(swiper-font-lock-ensure)
(while (< (point) (point-max))
(when (swiper-match-usable-p)
(let ((str (swiper--line)))
(setq str (ivy-cleanup-string str))
(let ((line-number-str
(format swiper--format-spec line-number)))
(if swiper-include-line-number-in-search
(setq str (concat line-number-str str))
(put-text-property
0 1 'display line-number-str str))
(put-text-property
0 1 'swiper-line-number line-number str))
(push str candidates)))
(funcall advancer 1)
(cl-incf line-number))
(nreverse candidates))))))
(defvar swiper--opoint 1
"The point when `swiper' starts.")
;;;###autoload
(defun swiper (&optional initial-input)
"`isearch-forward' with an overview.
When non-nil, INITIAL-INPUT is the initial search pattern."
(interactive)
(swiper--ivy (swiper--candidates) initial-input))
;;;###autoload
(defun swiper-backward (&optional initial-input)
"`isearch-backward' with an overview.
When non-nil, INITIAL-INPUT is the initial search pattern."
(interactive)
(let ((ivy-index-functions-alist
'((swiper . ivy-recompute-index-swiper-backward))))
(swiper initial-input)))
;;;###autoload
(defun swiper-thing-at-point ()
"`swiper' with `ivy-thing-at-point'."
(interactive)
(let ((thing (ivy-thing-at-point)))
(when (use-region-p)
(deactivate-mark))
(swiper thing)))
;;;###autoload
(defun swiper-all-thing-at-point ()
"`swiper-all' with `ivy-thing-at-point'."
(interactive)
(let ((thing (ivy-thing-at-point)))
(when (use-region-p)
(deactivate-mark))
(swiper-all thing)))
(defvar swiper--current-window-start nil
"Store `window-start' to restore it later.
This prevents a \"jumping\" behavior which occurs when variables
such as `scroll-conservatively' are set to a high value.")
(defun swiper--extract-matches (regex cands)
"Extract captured REGEX groups from CANDS."
(let (res)
(dolist (cand cands)
(setq cand (substring cand 1))
(when (string-match regex cand)
(push (mapconcat (lambda (n) (match-string-no-properties n cand))
(number-sequence
1
(/ (- (length (match-data)) 2) 2))
" ")
res)))
(nreverse res)))
(defun swiper--occur-cands (fname cands)
(when cands
(with-current-buffer (ivy-state-buffer ivy-last)
(when (eq (ivy-state-caller ivy-last) 'swiper-isearch)
(setq cands (mapcar #'swiper--line-at-point cands)))
(let* ((pt-min (point-min))
(line-delta
(save-restriction
(widen)
(1- (line-number-at-pos pt-min))))
(lines
(if (eq (ivy-state-caller ivy-last) 'swiper-isearch)
(swiper--isearch-occur-cands cands)
(mapcar (lambda (s)
(cons
(get-text-property 0 'swiper-line-number s)
s))
cands)))
(offset (+ (length fname) 2)))
(mapcar (lambda (x)
(let ((nn (number-to-string
(+ (car x) line-delta))))
(put-text-property 0 (length nn) 'face 'ivy-grep-line-number nn)
(put-text-property 0 1 'offset (+ offset (length nn)) fname)
(format "%s:%s:%s" fname nn (cdr x))))
lines)))))
(defun swiper--isearch-occur-cands (cands)
(let* ((last-pt (get-text-property 0 'point (car cands)))
(line (1+ (line-number-at-pos last-pt)))
res pt)
(dolist (cand cands)
(setq pt (get-text-property 0 'point cand))
(cl-incf line (1- (count-lines last-pt pt)))
(push (cons line cand) res)
(setq last-pt pt))
(nreverse res)))
(defun swiper-occur (&optional revert)
"Generate a custom occur buffer for `swiper'.
When REVERT is non-nil, regenerate the current *ivy-occur* buffer.
When capture groups are present in the input, print them instead of lines."
(let* ((buffer (ivy-state-buffer ivy-last))
(fname (propertize
(with-ivy-window
(if (buffer-file-name buffer)
(file-name-nondirectory
(buffer-file-name buffer))
(buffer-name buffer)))
'face
'ivy-grep-info))
(ivy-text (progn (string-match "\"\\(.*\\)\"" (buffer-name))
(match-string 1 (buffer-name))))
(re (mapconcat #'identity (ivy--split ivy-text) ".*?"))
(cands
(swiper--occur-cands
fname
(if (not revert)
ivy--old-cands
(setq ivy--old-re nil)
(save-window-excursion
(switch-to-buffer buffer)
(if (eq (ivy-state-caller ivy-last) 'swiper)
(let ((ivy--regex-function 'swiper--re-builder))
(ivy--filter re (swiper--candidates)))
(swiper-isearch-function ivy-text)))))))
(if (string-match-p "\\\\(" re)
(insert
(mapconcat #'identity
(swiper--extract-matches
re (with-current-buffer buffer
(swiper--candidates)))
"\n"))
(unless (eq major-mode 'ivy-occur-grep-mode)
(ivy-occur-grep-mode)
(font-lock-mode -1))
(setq swiper--current-window-start nil)
(insert (format "-*- mode:grep; default-directory: %S -*-\n\n\n"
default-directory))
(insert (format "%d candidates:\n" (length cands)))
(ivy--occur-insert-lines
(mapcar
(lambda (cand) (concat "./" cand))
cands))
(goto-char (point-min))
(forward-line 4))))
(ivy-set-occur 'swiper 'swiper-occur)
(declare-function evil-set-jump "ext:evil-jumps")
(defvar swiper--current-line nil)
(defvar swiper--current-match-start nil)
(defvar swiper--point-min nil)
(defvar swiper--point-max nil)
(defvar swiper--reveal-mode nil)
(defun swiper--init ()
"Perform initialization common to both completion methods."
(setq swiper--current-line nil)
(setq swiper--current-match-start nil)
(setq swiper--current-window-start nil)
(setq swiper--opoint (point))
(setq swiper--point-min (point-min))
(setq swiper--point-max (point-max))
(when (setq swiper--reveal-mode
(bound-and-true-p reveal-mode))
(reveal-mode -1))
(lazy-highlight-cleanup t)
(setq isearch-opened-overlays nil)
(when (bound-and-true-p evil-mode)
(evil-set-jump)))
(declare-function char-fold-to-regexp "char-fold")
(defun swiper--re-builder (str)
"Transform STR into a swiper regex.
This is the regex used in the minibuffer where candidates have
line numbers. For the buffer, use `ivy--regex' instead."
(let* ((re-builder (ivy-alist-setting ivy-re-builders-alist))
(re (cond
((equal str "")
"")
((equal str "^")
(setq ivy--subexps 0)
".")
((= (aref str 0) ?^)
(let* ((re (funcall re-builder (substring str 1)))
(re (if (listp re)
(mapconcat (lambda (x)
(format "\\(%s\\)" (car x)))
(cl-remove-if-not #'cdr re)
".*?")
re)))
(if (zerop ivy--subexps)
(prog1 (format "^ ?\\(%s\\)" re)
(setq ivy--subexps 1))
(format "^ %s" re))))
((eq (bound-and-true-p search-default-mode) 'char-fold-to-regexp)
(let ((subs (ivy--split str)))
(setq ivy--subexps (length subs))
(mapconcat
(lambda (s) (format "\\(%s\\)" (char-fold-to-regexp s)))
subs
".*?")))
(t
(funcall re-builder str)))))
re))
(defvar swiper-history nil
"History for `swiper'.")
(defvar swiper-invocation-face nil
"The face at the point of invocation of `swiper'.")
(defcustom swiper-stay-on-quit nil
"When non-nil don't go back to search start on abort."
:type 'boolean)
(defun swiper--ivy (candidates &optional initial-input)
"Select one of CANDIDATES and move there.
When non-nil, INITIAL-INPUT is the initial search pattern."
(swiper--init)
(setq swiper-invocation-face
(plist-get (text-properties-at (point)) 'face))
(let ((preselect
(if (or swiper-use-visual-line (null search-invisible))
(count-screen-lines
(point-min)
(save-excursion (beginning-of-visual-line) (point)))
(1- (line-number-at-pos))))
(minibuffer-allow-text-properties t)
res)
(unwind-protect
(and
(setq res
(ivy-read
"Swiper: "
candidates
:initial-input initial-input
:keymap swiper-map
:preselect
(if initial-input
(cl-position-if
(lambda (x)
(= (1+ preselect) (get-text-property 0 'swiper-line-number x)))
(progn
(setq ivy--old-re nil)
(ivy--filter initial-input candidates)))
preselect)
:require-match t
:update-fn #'swiper--update-input-ivy
:unwind #'swiper--cleanup
:action #'swiper--action
:re-builder #'swiper--re-builder
:history 'swiper-history
:caller 'swiper))
(point))
(unless (or res swiper-stay-on-quit)
(goto-char swiper--opoint))
(unless (or res (string= ivy-text ""))
(cl-pushnew ivy-text swiper-history))
(when swiper--reveal-mode
(reveal-mode 1)))))
(defun swiper-toggle-face-matching ()
"Toggle matching only the candidates with `swiper-invocation-face'."
(interactive)
(setf (ivy-state-matcher ivy-last)
(if (ivy-state-matcher ivy-last)
nil
#'swiper--face-matcher))
(setq ivy--old-re nil))
(defun swiper--face-matcher (regexp candidates)
"Return REGEXP matching CANDIDATES.
Matched candidates should have `swiper-invocation-face'."
(cl-remove-if-not
(lambda (x)
(and (string-match regexp x)
(let* ((s (match-string 0 x))
(n (length s))
(i 0))
(while (and (< i n)
(text-property-any
i (1+ i)
'face swiper-invocation-face
s))
(cl-incf i))
(= i n))))
candidates))
(defun swiper--ensure-visible ()
"Remove overlays hiding point."
(let ((overlays (overlays-at (1- (point))))
ov expose)
(while (setq ov (pop overlays))
(if (and (invisible-p (overlay-get ov 'invisible))
(setq expose (overlay-get ov 'isearch-open-invisible)))
(funcall expose ov)))))
(defvar swiper--overlays nil
"Store overlays.")
(defvar swiper--isearch-highlight-timer nil
"This timer used by `swiper--delayed-add-overlays'.")
(defun swiper--cleanup ()
"Clean up the overlays."
(while swiper--overlays
(delete-overlay (pop swiper--overlays)))
;; force cleanup unless it's :unwind
(lazy-highlight-cleanup
(if (eq ivy-exit 'done) lazy-highlight-cleanup t))
(when (timerp swiper--isearch-highlight-timer)
(cancel-timer swiper--isearch-highlight-timer)
(setq swiper--isearch-highlight-timer nil)))
(defun swiper--add-cursor-overlay (wnd)
(let* ((special (or (eolp) (looking-at "\t")))
(ov (make-overlay (point) (if special (point) (1+ (point))))))
(if special
(overlay-put ov 'after-string (propertize " " 'face 'ivy-cursor))
(overlay-put ov 'face 'ivy-cursor))
(overlay-put ov 'window wnd)
(overlay-put ov 'priority 2)
(push ov swiper--overlays)))
(defun swiper--add-line-overlay (wnd)
(let ((beg (if visual-line-mode
(save-excursion
(beginning-of-visual-line)
(point))
(line-beginning-position)))
(end (if visual-line-mode
(save-excursion
(end-of-visual-line)
(point))
(1+ (line-end-position)))))
(push (swiper--make-overlay beg end 'swiper-line-face wnd 0)
swiper--overlays)))
(defun swiper--make-overlay (beg end face wnd priority)
"Create an overlay bound by BEG and END.
FACE, WND and PRIORITY are properties corresponding to
the face, window and priority of the overlay."
(let ((overlay (make-overlay beg end)))
(overlay-put overlay 'face face)
(overlay-put overlay 'window wnd)
(overlay-put overlay 'priority priority)
overlay))
(defun swiper--recenter-p ()
(or (display-graphic-p)
(not recenter-redisplay)))
(defun swiper--positive-regexps (str)
(let ((regexp-or-regexps
(funcall ivy--regex-function str)))
(if (listp regexp-or-regexps)
(mapcar #'car (cl-remove-if-not #'cdr regexp-or-regexps))
(list regexp-or-regexps))))
(defun swiper--update-input-ivy ()
"Called when `ivy' input is updated."
(with-ivy-window
(swiper--cleanup)
(when (> (length (ivy-state-current ivy-last)) 0)
(let ((regexps (swiper--positive-regexps ivy-text)))
(dolist (re regexps)
(let* ((re (replace-regexp-in-string
" " "\t"
re))
(num (get-text-property 0 'swiper-line-number (ivy-state-current ivy-last))))
(unless (memq this-command '(ivy-yank-word
ivy-yank-symbol
ivy-yank-char
scroll-other-window))
(when (cl-plusp num)
(unless (if swiper--current-line
(eq swiper--current-line num)
(eq (line-number-at-pos) num))
(goto-char swiper--point-min)
(if swiper-use-visual-line
(line-move (1- num))
(forward-line (1- num))))
(if (and (equal ivy-text "")
(>= swiper--opoint (line-beginning-position))
(<= swiper--opoint (line-end-position)))
(goto-char swiper--opoint)
(if (eq swiper--current-line num)
(when swiper--current-match-start
(goto-char swiper--current-match-start))
(setq swiper--current-line num))
(when (re-search-forward re (line-end-position) t)
(setq swiper--current-match-start (match-beginning 0))))
(isearch-range-invisible (line-beginning-position)
(line-end-position))
(when (and (swiper--recenter-p)
(or
(< (point) (window-start))
(> (point) (window-end (ivy-state-window ivy-last) t))))
(recenter))
(setq swiper--current-window-start (window-start))))
(swiper--add-overlays
re
(max
(if (swiper--recenter-p)
(window-start)
(line-beginning-position (- (window-height))))
swiper--point-min)
(min
(if (swiper--recenter-p)
(window-end (selected-window) t)
(line-end-position (window-height)))
swiper--point-max))))))))
(defun swiper--add-overlays (re &optional beg end wnd)
"Add overlays for RE regexp in visible part of the current buffer.
BEG and END, when specified, are the point bounds.
WND, when specified is the window."
(setq wnd (or wnd (ivy-state-window ivy-last)))
(swiper--add-line-overlay wnd)
(let* ((pt (point))
(wh (window-height))
(beg (or beg (save-excursion
(forward-line (- wh))
(point))))
(end (or end (save-excursion
(forward-line wh)
(point))))
(case-fold-search (ivy--case-fold-p re)))
(when (>= (length re) swiper-min-highlight)
(save-excursion
(goto-char beg)
;; RE can become an invalid regexp
(while (and (ignore-errors (re-search-forward re end t))
(> (- (match-end 0) (match-beginning 0)) 0))
;; Don't highlight a match if it spans multiple
;; lines. `count-lines' returns 1 if the match is within a
;; single line, even if it includes the newline, and 2 or
;; greater otherwise. We hope that the inclusion of the
;; newline will not ever be a problem in practice.
(when (< (count-lines (match-beginning 0) (match-end 0)) 2)
(let* ((faces (if (= (match-end 0) pt)
swiper-faces
swiper-background-faces))
(adder-fn (lambda (beg end face priority)
(push (swiper--make-overlay beg end face wnd priority)
isearch-lazy-highlight-overlays))))
(unless (and (consp ivy--old-re)
(null
(save-match-data
(ivy--re-filter ivy--old-re
(list
(buffer-substring-no-properties
(line-beginning-position)
(line-end-position)))))))
(swiper--add-properties faces adder-fn)))))))))
(defun swiper--add-properties (faces adder-fn)
(let ((mb (match-beginning 0))
(me (match-end 0)))
(unless (> (- me mb) 2017)
(funcall adder-fn
mb me
(if (zerop ivy--subexps)
(cadr faces)