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isl.el
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isl.el
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;;; isl.el --- Simple incremental search in current-buffer -*- lexical-binding: t -*-
;; Author: Thierry Volpiatto <thievol@posteo.net>
;; Copyright (C) 2021~2023 Thierry Volpiatto <thievol@posteo.net>
;; Version: 1.0
;; URL: https://github.com/thierryvolpiatto/isearch-light
;; Compatibility: GNU Emacs 25.1+
;; Package-Requires: ((emacs "25.1"))
;; This program 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 of the License, 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.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; ISL Like I-Search-Light.
;; Search regexp incrementaly in current-buffer.
;;; Code:
(require 'cl-lib)
;; Compatibility
(unless (and (fboundp 'pos-bol) (fboundp 'pos-eol))
(defalias 'pos-bol 'line-beginning-position)
(defalias 'pos-eol 'line-end-position))
(defvar iedit-aborting)
(defvar iedit-read-only-occurrences-overlays)
(defvar iedit-read-only-occurrences-overlays)
(defvar iedit-case-sensitive)
(defvar iedit-occurrences-overlays)
(defvar iedit-mode)
(defvar helm-occur-always-search-in-current)
(defvar hs-minor-mode)
(defvar hs-show-hook)
(declare-function iedit-make-read-only-occurrence-overlay "ext:iedit-lib.el")
(declare-function iedit-make-occurrence-overlay "ext:iedit-lib.el")
(declare-function iedit-update-index "ext:iedit-lib.el")
(declare-function iedit-lib-cleanup "ext:iedit-lib.el")
(declare-function iedit-start "ext:iedit.el")
(declare-function iedit-done "ext:iedit.el")
(declare-function outline-show-entry "outline.el")
(declare-function org-reveal "org.el")
(declare-function helm-multi-occur-1 "ext:helm-occur.el")
(declare-function hs-show-block "hideshow.el")
(declare-function markdown-show-entry "ext:markdown-mode.el")
(declare-function bm-toggle "ext:bm.el")
;; Internals
(defvar isl-pattern "")
(defvar-local isl-last-query nil)
(put 'isl-last-query 'permanent-local t)
(defvar-local isl-last-object nil)
(put 'isl-last-object 'permanent-local t)
(defvar isl-visited-buffers nil)
(defvar isl-current-buffer nil)
(defvar isl--item-overlays nil)
(defvar isl--iterator nil)
(defvar isl--last-overlay nil)
(defvar isl--direction nil)
(defvar isl-initial-pos nil)
(defvar isl--number-results 0)
(defvar isl-history nil)
(defvar isl--yank-point nil)
(defvar isl--quit nil)
(defvar isl--invalid nil)
(defvar-local isl--buffer-invisibility-spec nil)
(defconst isl-space-regexp "\\s\\\\s-"
"Match a quoted space in a string.")
(defconst isl--case-fold-choices '(smart nil t))
(defvar isl--case-fold-choices-iterator nil)
(defvar isl-help-buffer-name "*isl help*")
(defvar isl--hidding nil)
(defvar isl--point-min nil)
(defvar isl--point-max nil)
(defvar isl--extra-items-overlays nil)
(defvar isl-search-invisible t)
;; User vars
(defvar isl-timer-delay 0.01)
(defvar isl-help-string
"* ISL help\n
Incremental search in current buffer with multi match (InLine/InSymbol).
** Commands
\\<isl-map>
\\[isl-display-or-quit-help]\t\tDisplay or quit this help buffer
\\[isl-help-quit]\t\tQuit this help buffer
\\[isl-goto-next]\t\tGoto next occurence
\\[isl-goto-prev]\t\tGoto previous occurence
\\[isl-scroll-down]\t\tScroll down
\\[isl-scroll-up]\t\tScroll up
\\[isl-exit-at-point]\t\tExit at current position
\\[abort-recursive-edit]\t\tQuit and restore initial position
\\[isl-yank-word-at-point]\t\tYank word at point
\\[isl-yank-symbol-at-point]\t\tYank symbol at point
\\[isl-recenter]\t\tRecenter current buffer
\\[isl-change-matching-style]\t\tToggle matching style (regexp/litteral)
\\[isl-select-case-fold-search]\t\tChange case fold search (cycle: *=smart, 1=t, 0=nil)
\\[isl-goto-first]\t\tGoto first occurence
\\[isl-goto-last]\t\tGoto last occurence
\\[isl-goto-closest-from-start]\t\tGoto closest occurence from start
\\[isl-jump-to-helm-occur]\t\tJump to helm-occur
\\[isl-jump-to-iedit-mode]\t\tJump to iedit-mode
\\[isl-query-replace]\t\tJump to query replace
\\[isl-show-or-hide-context-lines]\t\tHide or show non matching lines
\\[isl-toggle-multi-search-in-line]\t\tToggle multi search style (InLine/InSymbol)
\\[isl-toggle-invisible-search]\t\tToggle searching in invisible text
\\[isl-bm-this-pos]\t\tAdd bookmark BM to current pos")
(defgroup isl nil
"Search buffers with `isl-search'."
:prefix "isl-"
:group 'matching)
(defcustom isl-search-function #'isl--re-search-forward
"The search function that will be used by default when starting `isl-search'.
Possible values are `isl--re-search-forward' and `search-forward', the
first use regexp matching while the second is using literal matching.
Its value can be changed during `isl-search' session with `\\<isl-map>\\[isl-change-matching-style]'."
:type '(choice
(function :tag "Regexp matching" isl--re-search-forward)
(function :tag "Literal matching" search-forward)))
(defcustom isl-case-fold-search 'smart
"The `case-fold-search' value.
Possible value are nil, t or smart.
Value smart means use `case-fold-search' when upcase chars are detected
in pattern."
:type 'symbol)
(defcustom isl-after-position-string ">"
"The string used to notify in mode-line when position is above initial pos."
:type 'string)
(defcustom isl-before-position-string "<"
"The string used to notify in mode-line when position is below initial pos."
:type 'string)
(defcustom isl-direction-down-string "↓"
"The string used in mode-line to notify search direction."
:type 'string)
(defcustom isl-direction-up-string "↑"
"The string used in mode-line to notify search direction."
:type 'string)
(defcustom isl-warning-char "⚠"
"Used to signal invalid regexp in mode-line."
:type 'string)
(defcustom isl-save-pos-to-mark-ring t
"Save initial position to `mark-ring' on exit when non nil."
:type 'boolean)
(defcustom isl-requires-pattern 1
"Start updating after this number of chars."
:type 'integer)
(defcustom isl-visible-context-lines 1
"Number of lines to show around line when hiding non matching lines."
:type 'integer)
(defcustom isl-noresume-buffers '("*Helm Help*")
"Prevent resuming in these buffers."
:type '(repeat string))
(defcustom isl-multi-search-in-line nil
"Multi search in line when non nil.
Otherwise multi search only in symbols.
In buffers containing huge lines or sometimes only one huge line, you
should multi search only in symbols and not in whole line which is
really costly and may take ages or crash Emacs.
You can toggle this at any time with \\<isl-map>\\[isl-toggle-multi-search-in-line]."
:type 'boolean
:initialize 'custom-initialize-changed
:set (lambda (var val)
(set var val)
(if val
(set-face-attribute 'isl-on nil :extend t)
(set-face-attribute 'isl-on nil :extend nil))))
(defcustom isl-no-invisible-search-in-modes nil
"Do not search invisible text in these modes."
:type '(repeat symbol))
(defface isl-match
'((t :background "Brown4"))
"Face used to highlight the items matched.")
(defface isl-match-items
'((t :background "SaddleBrown" :foreground "black"))
"Face used to highlight the items matched inside line.")
(defface isl-on
'((t :background "SandyBrown"
:foreground "black"))
"Face used to highlight the item where point is.")
(defface isl-line
'((t :background "Darkgoldenrod1" :extend t))
"Face used to flash line on exit.")
(defface isl-number
'((t :foreground "green"))
"Face used to highlight number in mode-line.")
(defface isl-string
'((t :foreground "Lightgoldenrod1" :bold t))
"Face used to highlight pattern in mode-line.")
(defface isl-case-fold
'((t :inherit isl-string))
"Face used to highlight case sensitivity string in mode-line.")
(defvar isl-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map minibuffer-local-map)
(define-key map (kbd "C-s") 'isl-goto-next)
(define-key map (kbd "C-r") 'isl-goto-prev)
(define-key map (kbd "C-n") 'isl-goto-next)
(define-key map (kbd "C-p") 'isl-goto-prev)
(define-key map (kbd "<down>") 'isl-goto-next)
(define-key map (kbd "<up>") 'isl-goto-prev)
(define-key map (kbd "RET") 'isl-exit-at-point)
(define-key map (kbd "C-w") 'isl-yank-word-at-point)
(define-key map (kbd "C-z") 'isl-yank-symbol-at-point)
(define-key map (kbd "M-r") 'isl-change-matching-style)
(define-key map (kbd "M-c") 'isl-select-case-fold-search)
(define-key map (kbd "M-<") 'isl-goto-first)
(define-key map (kbd "M->") 'isl-goto-last)
(define-key map (kbd "M-=") 'isl-goto-closest-from-start)
(define-key map (kbd "M-s") 'isl-jump-to-helm-occur)
(define-key map (kbd "M-i") 'isl-toggle-invisible-search)
(define-key map (kbd "C-;") 'isl-jump-to-iedit-mode)
(define-key map (kbd "M-%") 'isl-query-replace)
(define-key map (kbd "C-h m") 'isl-display-or-quit-help)
(define-key map (kbd "C-q") 'isl-help-quit)
(define-key map (kbd "C-'") 'isl-show-or-hide-context-lines)
(define-key map (kbd "C-l") 'isl-recenter)
(define-key map (kbd "C-v") 'isl-scroll-up)
(define-key map (kbd "M-v") 'isl-scroll-down)
(define-key map (kbd "C-k") 'isl-delete-minibuffer-contents)
(define-key map (kbd "C-j") 'isl-toggle-multi-search-in-line)
(define-key map (kbd "C-c b") 'isl-bm-this-pos)
map)
"The map used when `isl-search' is running.
Don't forget to modify `isl-mini-map' accordingly to fit with kmacros
when modifying keybindings here.")
;;; Actions
;;
(defun isl--goto-overlay (overlay)
"Goto OVERLAY."
(let ((pos (and overlay (overlay-end overlay))))
(when (and overlay pos)
(setq isl--last-overlay overlay)
(overlay-put overlay 'face 'isl-on)
(goto-char pos)
(setq isl--yank-point pos))))
(defun isl-bm-this-pos ()
"Toggle bookmark on current position with `bm'.
Need to have the `bm' package installed."
(interactive)
(cl-assert (require 'bm nil t) nil "Please install `bm' package")
(with-selected-window (minibuffer-selected-window)
(when isl--last-overlay
(save-excursion
(goto-char (overlay-end isl--last-overlay))
(bm-toggle)))))
(defun isl--highlight-last-overlay (face)
"Highlight `isl--last-overlay' with FACE."
(when (overlayp isl--last-overlay)
(overlay-put isl--last-overlay 'face face)))
(defun isl-goto-next-1 (arg)
"Main function that allow moving from one to ARG overlay.
It put overlay on current position, move to next overlay using
`isl--iterator', set `isl--yank-point' and then setup mode-line."
(with-selected-window (minibuffer-selected-window)
(isl--highlight-last-overlay 'isl-match)
(when isl--iterator
;; This is a noop when ARG==1 i.e. (1- 1) == 0.
(cl-loop repeat (1- arg) do (isl-iter-next isl--iterator))
(isl--goto-overlay (isl-iter-next isl--iterator)))
(isl-setup-mode-line)))
(defun isl-scroll-1 (arg)
"Scroll up if ARG is positive, down if it is negative."
(let (ov)
(with-selected-window (minibuffer-selected-window)
(when isl--iterator
(setq ov (if (> arg 0)
(isl--first-ov-after-pos (window-end))
(isl--first-ov-before-pos (window-start))))))
(when ov
(isl--find-and-goto-overlay ov)
(with-selected-window (minibuffer-selected-window)
(recenter)))))
(defun isl--first-ov-after-pos (pos)
"Move to next overlay from POS."
(cl-loop for ov in isl--item-overlays
when (> (overlay-start ov) pos)
return ov))
(defun isl--first-ov-before-pos (pos)
"Move to previous overlay from POS."
(cl-loop for ov in (reverse isl--item-overlays)
when (< (overlay-start ov) pos)
return ov))
(defun isl-scroll-up ()
"Scroll up to closest overlay in next screen."
(interactive)
(isl-scroll-1 1))
(put 'isl-scroll-up 'no-helm-mx t)
(defun isl-scroll-down ()
"Scroll down to closest overlay in previous screen."
(interactive)
(isl-scroll-1 -1))
(put 'isl-scroll-down 'no-helm-mx t)
(defun isl-delete-minibuffer-contents ()
"No docstring."
(interactive)
(with-selected-window (minibuffer-window)
(if (eolp)
(delete-region (minibuffer-prompt-end) (point))
(delete-region (point) (point-max)))))
(put 'isl-delete-minibuffer-contents 'no-helm-mx t)
(defun isl--find-and-goto-overlay (overlay)
"Consume iterators up to OVERLAY and jump to it."
(with-selected-window (minibuffer-selected-window)
(let (ov)
(while (not (eql (setq ov (isl-iter-next isl--iterator))
overlay)))
(isl--highlight-last-overlay 'isl-match)
(and ov (isl--goto-overlay ov)))
(isl-setup-mode-line)))
(defun isl-goto-first ()
"Goto first match."
(interactive)
(let ((ov (car isl--item-overlays)))
(if (eql ov isl--last-overlay)
(user-error "Already at first occurence")
(isl--find-and-goto-overlay ov))))
(put 'isl-goto-first 'no-helm-mx t)
(defun isl-goto-last ()
"Goto last match."
(interactive)
(let ((ov (car (last isl--item-overlays))))
(if (eql ov isl--last-overlay)
(user-error "Already at last occurence")
(isl--find-and-goto-overlay ov))))
(put 'isl-goto-last 'no-helm-mx t)
(defun isl-goto-closest-from-start ()
"Goto closest match from start."
(interactive)
(let ((ov (isl-closest-overlay
isl-initial-pos isl--item-overlays)))
(if (eql ov isl--last-overlay)
(user-error "Already at closest occurence from start")
(isl--find-and-goto-overlay ov))))
(put 'isl-goto-closest-from-start 'no-helm-mx t)
(defun isl-goto-next (&optional arg)
"Go to next ARG match."
(interactive "p")
(when (eq isl--direction 'backward)
(setq isl--direction 'forward)
(isl-set-iterator t))
(isl-goto-next-1 arg))
(put 'isl-goto-next 'no-helm-mx t)
(defun isl-goto-prev (&optional arg)
"Go to previous ARG matches."
(interactive "p")
(when (eq isl--direction 'forward)
(setq isl--direction 'backward)
(isl-set-iterator t))
(isl-goto-next-1 arg))
(put 'isl-goto-prev 'no-helm-mx t)
(defun isl-exit-at-point ()
"Exit minibuffer and jump at current position."
(interactive)
(with-selected-window (minibuffer-selected-window)
;; Ensure user haven't scrolled to another place.
(let ((end (overlay-end isl--last-overlay)))
(goto-char (if isl-multi-search-in-line
(1- end) end)))
(when isl-multi-search-in-line
(let* ((ovs (overlays-in (pos-bol) (pos-eol)))
(matches (cl-loop for ov in ovs
when (overlay-get ov 'isl-matches)
collect ov)))
(when matches
(goto-char (overlay-end (car matches))))))
(when isl-save-pos-to-mark-ring
(set-marker (mark-marker) isl-initial-pos)
(push-mark isl-initial-pos 'nomsg))
(let ((ov (make-overlay (pos-bol) (1+ (pos-eol)))))
(overlay-put ov 'face 'isl-line)
(sit-for 0.2)
(delete-overlay ov)))
;; Call `exit-minibuffer' out of the `with-selected-window' block to
;; avoid error with the emacs-28 version.
(exit-minibuffer))
(put 'isl-exit-at-point 'no-helm-mx t)
(defun isl-yank-word-at-point ()
"Yank word at point in minibuffer.
The word at point is relative to the current position in buffer, not
the initial position i.e. the position before launching `isl-search'."
(interactive)
(let (str)
(with-current-buffer isl-current-buffer
(when (eolp) (error "End of line"))
(when (or (memq (char-syntax (or (char-after) 0)) '(?w ?_ ? ))
(memq (char-syntax (or (char-after (1+ (point))) 0))
'(?w ?_ ? )))
(setq str (buffer-substring-no-properties (or isl--yank-point (point))
(save-excursion
(forward-word)
(point))))
(when (string-match "\\` " str)
(setq str (replace-match "\\\\ " nil nil str)))
(with-selected-window (minibuffer-window)
(insert str))))))
(put 'isl-yank-word-at-point 'no-helm-mx t)
(defun isl-yank-symbol-at-point ()
"Yank symbol at point in minibuffer.
The symbol at point is relative to the current position in buffer, not
the initial position i.e. the position before launching `isl-search'."
(interactive)
(let (str)
(with-current-buffer isl-current-buffer
(when (setq str (thing-at-point 'symbol t))
(with-selected-window (minibuffer-window)
(delete-minibuffer-contents)
(insert str))))))
(put 'isl-yank-symbol-at-point 'no-helm-mx t)
(defun isl-recenter ()
"Recenter from isl."
(interactive)
(with-selected-window (minibuffer-selected-window)
(recenter)))
(put 'isl-recenter 'no-helm-mx t)
(defun isl-matching-style ()
"Return current matching style as a string."
(cl-ecase isl-search-function
(isl--re-search-forward "Regex")
(search-forward "Literal")))
(defun isl-change-matching-style ()
"Toggle style matching in `isl-search' i.e. regexp/literal."
(interactive)
(with-current-buffer isl-current-buffer
(setq-local isl-search-function
(cl-ecase isl-search-function
(isl--re-search-forward #'search-forward)
(search-forward #'isl--re-search-forward)))
(unless executing-kbd-macro
(when (string= isl-pattern "")
(let* ((style (isl-matching-style))
(mode-line-format (format " Switching to %s searching" style)))
(force-mode-line-update)
(sit-for 1)))
(isl-update))))
(put 'isl-change-matching-style 'no-helm-mx t)
(defun isl-toggle-invisible-search ()
"Toggle searching in invisible text."
(interactive)
(with-current-buffer isl-current-buffer
(setq-local isl-search-invisible (not isl-search-invisible))
(unless isl-search-invisible
(setq buffer-invisibility-spec isl--buffer-invisibility-spec))
(message "Invisible search turned %s" (if isl-search-invisible "on" "off"))
(isl-update)))
(put 'isl-toggle-invisible-search 'no-helm-mx t)
(defun isl-jump-to-helm-occur ()
"Invoke `helm-occur' from `isl-search'."
(interactive)
(cl-assert (require 'helm-occur nil t) nil "Please install Helm package")
(let ((input isl-pattern)
(bufs (list isl-current-buffer)))
(run-at-time 0.1 nil
(lambda ()
;; Use `helm-occur-always-search-in-current' as a
;; flag for `helm-occur--select-closest-candidate'.
(let ((helm-occur-always-search-in-current t))
(helm-multi-occur-1 bufs input))))
(abort-recursive-edit)))
(put 'isl-jump-to-helm-occur 'no-helm-mx t)
(defun isl-query-replace (&optional arg)
"Launch `query-replace' from isl.
Argument ARG have same meaning as in `query-replace'."
(interactive "P")
(let ((style (isl-matching-style))
(regexp isl-pattern)
(start (overlay-start isl--last-overlay)))
(run-at-time
0.1 nil
(lambda ()
(let* ((regexp-flag (string= style "Regex"))
(prompt (if regexp-flag
"Query replace %s regexp"
"Query replace %s"))
(args (list
regexp
(query-replace-read-to
regexp
(format prompt (if arg "word" ""))
regexp-flag)
arg)))
(with-current-buffer isl-current-buffer
(save-excursion
(let ((case-fold-search t))
(goto-char start)
(apply #'perform-replace
(list (nth 0 args) (nth 1 args)
t regexp-flag (nth 2 args) nil
multi-query-replace-map))))))))
(abort-recursive-edit)))
(put 'isl-query-replace 'no-helm-mx t)
;; Iedit
;;
(defun isl--advice-iedit-start (old--fn &rest args)
"Allow iedit matching multi pattern.
Use `isl--iedit-make-occurrences-overlays' instead of
`iedit-make-occurrences-overlays' then apply OLD--FN on ARGS.
This is an around advice."
(cl-letf (((symbol-function 'iedit-make-occurrences-overlays)
#'isl--iedit-make-occurrences-overlays))
(apply old--fn args)))
(defun isl--iedit-make-occurrences-overlays (occurrence-regexp beg end)
"Same as `iedit-make-occurrences-overlays' but handle multiple regexps.
Arguments OCCURRENCE-REGEXP, BEG and END have same meaning as in
`iedit-make-occurrences-overlays'."
(setq iedit-aborting nil)
(setq iedit-occurrences-overlays nil)
(setq iedit-read-only-occurrences-overlays nil)
;; Find and record each occurrence's markers and add the overlay to the occurrences
(let ((counter 0)
(case-fold-search (not iedit-case-sensitive))
(length 0)
bounds)
(save-excursion
(save-selected-window
(goto-char beg)
(while (setq bounds (isl-multi-search-fwd occurrence-regexp end t))
(let ((beginning (car bounds))
(ending (cdr bounds)))
(if (and (> length 0) (/= (- ending beginning) length))
(throw 'not-same-length 'not-same-length)
(setq length (- ending beginning)))
(if (text-property-not-all beginning ending 'read-only nil)
(push (iedit-make-read-only-occurrence-overlay beginning ending)
iedit-read-only-occurrences-overlays)
(push (iedit-make-occurrence-overlay beginning ending)
iedit-occurrences-overlays))
(setq counter (1+ counter))))))
(iedit-update-index)
counter))
(defun isl-jump-to-iedit-mode ()
"Start Iedit mode from `isl' using last search string as the regexp."
(interactive)
(cl-assert (require 'iedit nil t))
(let ((regexp (if (eq isl-search-function 'search-forward)
(regexp-quote isl-pattern)
isl-pattern))
(pos (with-current-buffer isl-current-buffer
(overlay-end isl--last-overlay))))
(run-at-time
0.1 nil
(lambda ()
(save-restriction
(when (and isl--point-min isl--point-max)
(narrow-to-region isl--point-min isl--point-max))
(let ((case-fold-search (isl-set-case-fold-search regexp))
result)
(setq mark-active nil)
(run-hooks 'deactivate-mark-hook)
(when iedit-mode
(iedit-lib-cleanup))
(advice-add 'iedit-start :around #'isl--advice-iedit-start)
(unwind-protect
(progn
(setq result
(catch 'not-same-length
(iedit-start regexp (point-min) (point-max))))
(cond ((not iedit-occurrences-overlays)
(message "No matches found for %s" regexp)
(iedit-done))
((equal result 'not-same-length)
(message "Matches are not the same length.")
(iedit-done)))
(goto-char pos))
(advice-remove 'iedit-start #'isl--advice-iedit-start))))))
(abort-recursive-edit)))
(put 'isl-jump-to-iedit-mode 'no-helm-mx t)
(defun isl-display-or-quit-help ()
"Display or quit isl help buffer."
(interactive)
(if (get-buffer-window isl-help-buffer-name 'visible)
(progn
(switch-to-buffer isl-help-buffer-name)
(quit-window t))
(with-current-buffer-window
(get-buffer-create isl-help-buffer-name)
(cons 'display-buffer-below-selected
'((window-height . fit-window-to-buffer)
(preserve-size . (nil . t))))
nil
(with-current-buffer standard-output
(insert
(substitute-command-keys
isl-help-string)))
(outline-mode)
(setq cursor-type nil)
(setq buffer-read-only t)
(local-set-key (kbd "q") 'quit-window))))
(put 'isl-display-or-quit-help 'no-helm-mx t)
(defun isl-help-quit ()
"Quit isl help buffer."
(interactive)
(let ((win (get-buffer-window isl-help-buffer-name 'visible)))
(if win
(with-selected-window win
(quit-window))
(user-error "No help buffer found"))))
(put 'isl-help-quit 'no-helm-mx t)
(defun isl-show-or-hide-context-lines ()
"Hide or show non matching lines."
(interactive)
(when isl--item-overlays
(with-selected-window (minibuffer-selected-window)
(if (setq isl--hidding (not isl--hidding))
(let ((start 1) ; start at point-min.
ov-end bol)
(save-excursion
(goto-char (overlay-end (car isl--item-overlays)))
(setq ov-end (point))
(set (make-local-variable 'line-move-ignore-invisible) t)
(add-to-invisibility-spec '(isl-invisible . t))
(while (not (eobp))
(forward-line (- isl-visible-context-lines))
;; Store position from n lines before
;; this overlay and bol and move to next overlay.
(when (> (setq bol (pos-bol)) start)
(isl--put-invisible-overlay start (1- bol)))
(goto-char ov-end)
;; Go to n lines after last overlay found and jump to
;; next overlay from there.
(forward-line isl-visible-context-lines)
(setq start (1+ (pos-eol)))
(goto-char (next-single-char-property-change ov-end 'isl))
(setq ov-end (point)))
;; Store maybe remaining lines up to eob.
(when (< start (point-max))
(isl--put-invisible-overlay start (point-max)))))
(remove-overlays nil nil 'isl-invisible t)
(remove-from-invisibility-spec '(isl-invisible . t))))))
(put 'isl-show-or-hide-context-lines 'no-helm-mx t)
(defun isl--put-invisible-overlay (beg end)
"Make an invisible overlay from BEG to END."
(let ((ol (make-overlay beg end)))
(overlay-put ol 'isl-invisible t)
(overlay-put ol 'invisible 'isl-invisible)))
(defun isl-iter-circular (seq)
"Infinite iteration on SEQ."
(let ((lis seq))
(lambda ()
(let ((elm (car lis)))
(setq lis (pcase lis (`(,_ . ,ll) (or ll seq))))
elm))))
(defun isl-iter-next (iterator)
"Return next elm of ITERATOR."
(and iterator (funcall iterator)))
(defun isl-delete-overlays ()
"Cleanup ovelays."
(when isl--item-overlays
(remove-overlays nil nil 'isl t)
(setq isl--item-overlays nil
isl--extra-items-overlays nil)))
(cl-defun isl-set-case-fold-search (&optional (pattern isl-pattern))
"Return a suitable value for `case-fold-search'.
This is done according to `isl-case-fold-search'.
Optional argument PATTERN default to `isl-pattern'."
(cl-case isl-case-fold-search
(smart (let ((case-fold-search nil))
(if (string-match "[[:upper:]]" pattern) nil t)))
(t isl-case-fold-search)))
(defun isl-select-case-fold-search ()
"Set `case-fold-search' from `isl-search' session."
(interactive)
(with-current-buffer isl-current-buffer
(if (eq last-command 'isl-select-case-fold-search)
(setq-local isl-case-fold-search
(isl-iter-next isl--case-fold-choices-iterator))
(setq isl--case-fold-choices-iterator
(isl-iter-circular
(append (remove isl-case-fold-search isl--case-fold-choices)
(list isl-case-fold-search))))
(setq-local isl-case-fold-search
(isl-iter-next isl--case-fold-choices-iterator)))
(unless executing-kbd-macro
(isl-update))))
(put 'isl-select-case-fold-search 'no-helm-mx t)
(defun isl-split-string (str)
"Split string STR at non quoted spaces."
(split-string
(replace-regexp-in-string
isl-space-regexp "\\s-" str nil t)))
(defun isl-patterns (str)
"Return an alist of (pred . regexp) elements from STR."
(cl-loop for s in (isl-split-string str)
collect (if (char-equal ?! (aref s 0))
(cons 'not (substring s 1))
(cons 'identity s))))
(defsubst isl--re-search-forward (regexp &optional bound noerror count)
"Same as `re-search-forward' but return nil when point doesn't move.
This avoid possible infloop when a wrong regexp is entered in
minibuffer. Arguments REGEXP, BOUND, NOERROR and COUNT have same
meaning as in `re-search-forward'."
(let ((pos (point)))
(pcase (re-search-forward regexp bound noerror count)
((and it (guard (eql it pos))) nil)
(it it))))
(defun isl-multi-search-fwd (str &optional _bound _noerror _count)
"Return position of symbol or line matched by STR.
When arg STR contains spaces, it is converted in patterns with
`isl-patterns' , when first pattern of list match a symbol
subsequent patterns are used to check if all patterns match this
symbol. The return value is a cons cell (beg . end) denoting
symbol or line position according to `isl-multi-search-in-line'."
;; Prevent infloop crashing Emacs with incorrect configuration.
(cl-assert (memq isl-search-function '(isl--re-search-forward search-forward)))
(let* ((pattern (isl-patterns str))
(initial (or (assq 'identity pattern)
'(identity . "")))
;; In REST we search for all patterns but INITIAL we already
;; initially searched. We were previously using (cdr
;; pattern) which was fine as long as first pattern was not a
;; negation.
(rest (remove initial pattern))
(case-fold-search (isl-set-case-fold-search)))
(cl-loop while (condition-case _err
(funcall isl-search-function (cdr initial) nil t)
(invalid-regexp
(setq isl--invalid t) nil))
for bounds = (cond ((and rest isl-multi-search-in-line)
(cons (pos-bol) (1+ (pos-eol))))
(rest
(bounds-of-thing-at-point
(if (derived-mode-p 'prog-mode)
'symbol 'filename)))
(t (cons (match-beginning 0) (match-end 0))))
unless bounds return nil
if (or (not rest)
(cl-loop for (pred . re) in rest
always (funcall pred
(progn
(goto-char (car bounds))
(condition-case _err
(funcall isl-search-function
re (cdr bounds) t)
(invalid-regexp
(setq isl--invalid t) nil))))))
;; When executing kbd macros, behave as the interactive
;; isl-search and leave point on last match in line
;; instead of jumping on eol.
do (unless executing-kbd-macro (goto-char (cdr bounds)))
and return bounds
else do (goto-char (cdr bounds))
finally return nil)))
(defun isl-toggle-multi-search-in-line ()
"Toggle multi-search in lines/symbols."
(interactive)
(with-current-buffer isl-current-buffer
(setq-local isl-multi-search-in-line (not isl-multi-search-in-line))
(unless executing-kbd-macro
(if isl-multi-search-in-line
(set-face-attribute 'isl-on nil :extend t)
(set-face-attribute 'isl-on nil :extend nil))
(isl-update))))
(defun isl-maybe-update (str)
"Decide starting to update according to STR length.
See `isl-requires-pattern'."
(> (length str) isl-requires-pattern))
(defun isl-update ()
"Update `current-buffer' when `isl-pattern' change."
(with-selected-window (minibuffer-selected-window)
(while-no-input
(when isl--hidding
(remove-overlays nil nil 'isl-invisible t)
(remove-from-invisibility-spec '(isl-invisible . t))
(setq isl--hidding nil))
(isl-delete-overlays)
(setq isl--invalid nil)
;; We don't use the isearch-invisible mechanism which is heavy
;; and don't behave as we want, instead remove invisibility in
;; all buffer and on exit restore it and unhide only the place
;; where point is with appropriate functions belonging to
;; major-mode e.g. org => org-reveal etc...
(when (and isl-search-invisible
buffer-invisibility-spec
(listp buffer-invisibility-spec))
(mapc 'remove-from-invisibility-spec buffer-invisibility-spec))
(let ((count 1)
ov
bounds)
(unless (string= isl-pattern "")
(save-excursion
(goto-char (point-min))
(condition-case-unless-debug nil
(while (setq bounds (isl-multi-search-fwd isl-pattern nil t))
(unless (and (not isl-search-invisible)
(invisible-p (cdr bounds)))
(setq ov (make-overlay (car bounds) (cdr bounds)))
(push ov isl--item-overlays)
(overlay-put ov 'isl t)
(overlay-put ov 'pos count)
(overlay-put ov 'face 'isl-match)
(when isl-multi-search-in-line
(isl--highlight-items-in-line (car bounds) (cdr bounds)))
(cl-incf count)))
(invalid-regexp (setq isl--invalid t) nil))
(setq isl--item-overlays (reverse isl--item-overlays)))
(if (null isl--item-overlays)
(progn (setq isl--number-results 0)
(and isl-initial-pos (goto-char isl-initial-pos)))
(setq isl--last-overlay
(isl-closest-overlay
(or isl-initial-pos 0) isl--item-overlays)
isl--number-results (max (length isl--item-overlays) 0))
(isl--highlight-last-overlay 'isl-on)
(isl-set-iterator)
(goto-char (overlay-end (isl-iter-next isl--iterator)))
(setq isl--yank-point (point)))))
(isl-setup-mode-line))))
(defun isl--highlight-items-in-line (beg end)
"Highlight items inside a matched line from BEG to END."
;; When this is called we are at eol.
(save-excursion
(goto-char beg)
(cl-loop with ov2
for p in (isl-split-string isl-pattern)
unless (string-match "\\`!" p)
do (save-excursion
(while (isl--re-search-forward p end t)
(setq ov2 (make-overlay (match-beginning 0) (match-end 0)))
(push ov2 isl--extra-items-overlays)
(overlay-put ov2 'face 'isl-match-items)
(overlay-put ov2 'isl t)
(overlay-put ov2 'isl-matches t)
(overlay-put ov2 'priority 1))))))
(defun isl-setup-mode-line ()
"Setup `mode-line-format' for `isl-search'."
(let ((style (isl-matching-style))
(search (if isl-multi-search-in-line
(propertize "Inline" 'help-echo "Search in line")
(propertize "Insym" 'help-echo "Search in symbol")))
(position (with-current-buffer isl-current-buffer
(if (and isl-initial-pos
(> (point) isl-initial-pos))
isl-after-position-string
isl-before-position-string)))
(direction (if (eq isl--direction 'forward)
isl-direction-down-string
isl-direction-up-string)))
(when (numberp isl--number-results)
(setq mode-line-format
(cond ((or (string= isl-pattern "")
(<= (length isl-pattern)
isl-requires-pattern))
(default-value 'mode-line-format))
((zerop isl--number-results)
`(" " mode-line-buffer-identification " "
(:eval ,(format "%s `%s' [%s %s %s %s]"
(if isl--invalid
(propertize
(format "%s Invalid regexp:"
isl-warning-char)
'face 'font-lock-warning-face)
"No results found for pattern")
(propertize isl-pattern
'face 'isl-string)
style
search
(if isl-search-invisible
(propertize
" Sinv" 'help-echo
"Search in invisible text")
"")
direction))
" " mode-line-position))
(t `(" " mode-line-buffer-identification " "
(:eval ,(format
"[%s/%s] result(s) found [%s %s%s %s %s %s]"
(propertize
(number-to-string
(overlay-get isl--last-overlay 'pos))
'face 'isl-number)
(propertize (number-to-string
isl--number-results)
'face 'isl-number)
style
search
(if isl-search-invisible
(propertize
" Sinv" 'help-echo
"Search in invisible text")
"")
direction
position
(propertize (pcase isl-case-fold-search
(`smart "*")
(`t "1")
(`nil "0"))
'face 'isl-case-fold
'help-echo "case-fold-search")))
" " mode-line-position)))))))
(defun isl-closest-overlay (pos overlays)
"Return closest overlay from POS in OVERLAYS list."
(cl-loop for ov in overlays
for ovpos = (overlay-start ov)
for diff = (if (> pos ovpos) (- pos ovpos) (- ovpos pos))
collect (cons diff ov) into res
minimize diff into min
finally return (cdr (assq min res))))
(defun isl-set-iterator (&optional skip-first)
"Build `isl--iterator' against `isl--item-overlays' according to context.
When SKIP-FIRST is specified build overlay with the current overlay
appended at end."
(let* ((revlst (if (eq isl--direction 'forward)
isl--item-overlays
(reverse isl--item-overlays)))
(fwdlst (memql isl--last-overlay revlst))
(ovlst (append (if skip-first (cdr fwdlst) fwdlst)
(butlast revlst (length fwdlst))
(and skip-first (list (car fwdlst))))))
(setq isl--iterator (isl-iter-circular ovlst))))
(defun isl-check-input ()
"Check minibuffer input."
(with-selected-window (minibuffer-window)
(let ((input (minibuffer-contents)))