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lispy.el
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;;; lispy.el --- vi-like Paredit. -*- lexical-binding: t -*-
;; Copyright (C) 2014-2019 Oleh Krehel
;; Author: Oleh Krehel <[email protected]>
;; URL: https://github.com/abo-abo/lispy
;; Version: 0.27.0
;; Keywords: lisp
;; This file is not 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Due to the structure of Lisp syntax it's very rare for the
;; programmer to want to insert characters right before "(" or right
;; after ")". Thus unprefixed printable characters can be used to call
;; commands when the point is at one of these locations, which are
;; further referred to as special.
;;
;; Conveniently, when located at special position it's very clear to
;; which sexp the list-manipulating command will be applied to, what
;; the result be and where the point should end up afterwards. You
;; can enhance this effect with `show-paren-mode' or similar.
;;
;; Here's an illustration to this effect, with `lispy-clone' ("*"
;; represents the point):
;; |--------------------+-----+--------------------|
;; | before | key | after |
;; |--------------------+-----+--------------------|
;; | (looking-at "(")* | c | (looking-at "(") |
;; | | | (looking-at "(")* |
;; |--------------------+-----+--------------------|
;; | *(looking-at "(") | c | *(looking-at "(") |
;; | | | (looking-at "(") |
;; |--------------------+-----+--------------------|
;;
;; When special, the digit keys call `digit-argument', since most
;; `lispy' commands accept a numeric argument. For instance, "3c" is
;; equivalent to "ccc" (clone sexp 3 times), and "4j" is equivalent to
;; "jjjj" (move point 4 sexps down). Some useful applications are
;; "9l" and "9h" - they exit list forwards and backwards respectively
;; at most 9 times which makes them effectively equivalent to
;; `end-of-defun' and `beginning-of-defun'.
;;
;; To move the point into a special position, use:
;; "]" - calls `lispy-forward'
;; "[" - calls `lispy-backward'
;; "C-3" - calls `lispy-right' (exit current list forwards)
;; ")" - calls `lispy-right-nostring' (exit current list
;; forwards, but self-insert in strings and comments)
;;
;; These are the few Lispy commands that don't care whether the point
;; is special or not. Other such bindings are `DEL', `C-d', `C-k'.
;;
;; To get out of the special position, you can use any of the good-old
;; navigational commands such as `C-f' or `C-n'.
;; Additionally `SPC' will break out of special to get around the
;; situation when you have the point between open parens like this
;; "(|(" and want to start inserting. `SPC' will change the code to
;; this: "(| (".
;;
;; A lot of Lispy commands come in pairs: one reverses the other.
;; Some examples are:
;; |-----+--------------------------+------------+-------------------|
;; | key | command | key | command |
;; |-----+--------------------------+------------+-------------------|
;; | j | `lispy-down' | k | `lispy-up' |
;; | s | `lispy-move-down' | w | `lispy-move-up' |
;; | > | `lispy-slurp' | < | `lispy-barf' |
;; | c | `lispy-clone' | C-d or DEL | |
;; | C | `lispy-convolute' | C | reverses itself |
;; | d | `lispy-different' | d | reverses itself |
;; | M-j | `lispy-split' | + | `lispy-join' |
;; | O | `lispy-oneline' | M | `lispy-multiline' |
;; | S | `lispy-stringify' | C-u " | `lispy-quotes' |
;; | ; | `lispy-comment' | C-u ; | `lispy-comment' |
;; | xi | `lispy-to-ifs' | xc | `lispy-to-cond' |
;; | F | `lispy-follow' | D | `pop-tag-mark' |
;; |-----+--------------------------+------------+-------------------|
;;
;; Here's a list of commands for inserting pairs:
;; |-----+------------------------------------|
;; | key | command |
;; |-----+------------------------------------|
;; | ( | `lispy-parens' |
;; | { | `lispy-braces' |
;; | } | `lispy-brackets' |
;; | " | `lispy-quotes' |
;; |-----+------------------------------------|
;;
;; Here's a list of modified insertion commands that handle whitespace
;; in addition to self-inserting:
;; |-----+------------------------------------|
;; | key | command |
;; |-----+------------------------------------|
;; | SPC | `lispy-space' |
;; | : | `lispy-colon' |
;; | ^ | `lispy-hat' |
;; | ' | `lispy-tick' |
;; | ` | `lispy-backtick' |
;; |-----+------------------------------------|
;;
;; You can see the full list of bound commands with "F1 f lispy-mode".
;;
;; Most special commands will leave the point special after they're
;; done. This allows to chain them as well as apply them continuously
;; by holding the key. Some useful holdable keys are "jkf<>cws;".
;; Not so useful, but fun is "/": start it from "|(" position and hold
;; until all your Lisp code is turned into Python :).
;;
;; Some Clojure support depends on `cider'.
;; Some Scheme support depends on `geiser'.
;; Some Common Lisp support depends on `slime' or `sly'.
;; You can get them from MELPA.
;;
;; See http://abo-abo.github.io/lispy/ for a detailed documentation.
;;
;;; Code:
;;* Requires
(require 'mode-local)
(require 'lispy-tags)
(require 'help-fns)
(require 'edebug)
(require 'etags)
(require 'newcomment)
(require 'lispy-inline)
(require 'delsel)
(require 'pcase)
(declare-function 'comint-mode "comint" (&optional arg))
(declare-function 'comint-filename-completion "comint" ())
(autoload #'hydra-set-property "hydra")
(defsubst lispy-looking-back (regexp)
"Forward to (`looking-back' REGEXP)."
(looking-back regexp (line-beginning-position)))
;;* Locals: extract block
(defvar lispy-map-input-overlay nil
"The input overlay for mapping transformations.")
(defvar lispy-map-target-beg 1
"The target start for mapping transformations.")
(defvar lispy-map-target-len 1
"The target end for mapping transformations.")
(defvar lispy-map-format-function nil)
;;* Customization
(defgroup lispy nil
"List navigation and editing for the Lisp family."
:group 'bindings
:prefix "lispy-")
(defvar lispy-left "[([{]"
"Opening delimiter.")
(defvar lispy-right "[])}]"
"Closing delimiter.")
(defcustom lispy-no-space nil
"When non-nil, don't insert a space before parens/brackets/braces/colons."
:type 'boolean
:group 'lispy)
(make-variable-buffer-local 'lispy-no-space)
(defcustom lispy-lax-eval t
"When non-nil, fix \"unbound variable\" error by setting the it to nil.
This is useful when hacking functions with &optional arguments.
So evaling (setq mode (or mode major-mode)) will set mode to nil on
the first eval, and to major-mode on the second eval."
:type 'boolean
:group 'lispy)
(defcustom lispy-verbose t
"If t, lispy will display some messages on error state.
These messages are similar to \"Beginning of buffer\" error for
`backward-char' and can safely be ignored."
:type 'boolean
:group 'lispy)
(defcustom lispy-verbose-verbs t
"If t, verbs produced by `lispy-defverb' will have a hint in the echo area.
The hint will consist of the possible nouns that apply to the verb."
:type 'boolean
:group 'lispy)
(defcustom lispy-close-quotes-at-end-p nil
"If t, when pressing `\"' at the end of a quoted string, move past the end quote."
:type 'boolean
:group 'lispy)
(defcustom lispy-helm-columns '(70 80)
"Max lengths of tag and tag+filename when completing with `helm'."
:group 'lispy
:type '(list integer integer))
(defcustom lispy-no-permanent-semantic nil
"When t, `lispy' will not enable function `semantic-mode' when it's off."
:type 'boolean
:group 'lispy)
(defcustom lispy-completion-method 'ivy
"Method to select a candidate from a list of strings."
:type '(choice
(const :tag "Ivy" ivy)
;; sensible choice for many tags
(const :tag "Helm" helm)
;; `ido-vertical-mode' is highly recommended here
(const :tag "Ido" ido)
;; `icomplete-mode' and `icy-mode' will affect this
(const :tag "Default" default)))
(defcustom lispy-visit-method 'ffip
"Method to switch to a file in the current project."
:type '(choice
(const :tag "Find File in Project" ffip)
(const :tag "Projectile" projectile)))
(defcustom lispy-avy-style-char 'pre
"Method of displaying the overlays for a char during visual selection."
:type '(choice
(const :tag "Pre" pre)
(const :tag "At" at)
(const :tag "At full" at-full)
(const :tag "Post" post)))
(defcustom lispy-avy-style-paren 'at
"Method of displaying the overlays for a paren during visual selection."
:type '(choice
(const :tag "Pre" pre)
(const :tag "At" at)
(const :tag "At full" at-full)
(const :tag "Post" post)))
(defcustom lispy-avy-style-symbol 'pre
"Method of displaying the overlays for a symbol during visual selection."
:type '(choice
(const :tag "Pre" pre)
(const :tag "At" at)
(const :tag "At full" at-full)
(const :tag "Post" post)))
(defcustom lispy-avy-keys (number-sequence ?a ?z)
"Keys for jumping."
:type '(repeat :tag "Keys" (character :tag "char")))
(declare-function counsel-imenu "ext:counsel")
(defcustom lispy-imenu-function #'counsel-imenu
"Function used to jump to an imenu entry."
:type 'function)
(defface lispy-command-name-face
'((((class color) (background light))
:background "#d8d8f7" :inherit font-lock-function-name-face)
(((class color) (background dark))
:background "#333333" :inherit font-lock-function-name-face))
"Face for Elisp commands."
:group 'lispy-faces)
(defface lispy-cursor-face
'((((class color) (background light))
:background "#000000" :foreground "#ffffff")
(((class color) (background dark))
:background "#ffffff" :foreground "#000000"))
"Face for `lispy-view-test'."
:group 'lispy-faces)
(defface lispy-test-face
'((t (:inherit lispy-face-hint)))
"Face for `lispy-view-test'."
:group 'lispy-faces)
(defvar lispy-mode-map (make-sparse-keymap))
(defvar lispy-known-verbs nil
"List of registered verbs.")
(defvar lispy-ignore-whitespace nil
"When set to t, function `lispy-right' will not clean up whitespace.")
(defcustom lispy-compat '(edebug)
"List of package compatibility options.
Enabling them adds overhead, so make sure that you are actually
using those packages."
:type '(repeat
(choice
(const :tag "god-mode" god-mode)
(const :tag "magit-blame-mode" magit-blame-mode)
(const :tag "edebug" edebug)
(const :tag "cider" cider)
(const :tag "macrostep" macrostep))))
(defcustom lispy-safe-delete nil
"When non-nil, killing/deleting an active region keeps delimiters balanced.
This applies to `lispy-delete', `lispy-kill-at-point', `lispy-paste', and
`lispy-delete-backward'. This also applies to `lispy-yank' when
`delete-selection-mode' is non-nil."
:group 'lispy
:type 'boolean)
(defcustom lispy-safe-copy nil
"When non-nil, `lispy-new-copy' won't copy unbalanced delimiters in a region."
:group 'lispy
:type 'boolean)
(defcustom lispy-safe-paste nil
"When non-nil, `lispy-paste' and `lispy-yank' will add missing delimiters."
:group 'lispy
:type 'boolean)
(defcustom lispy-safe-threshold 1500
"The max size of an active region that lispy will try to keep balanced.
This only applies when `lispy-safe-delete', `lispy-safe-copy', and/or
`lispy-safe-paste' are non-nil."
:group 'lispy
:type 'number)
(defcustom lispy-safe-actions-ignore-strings t
"When non-nil, don't try to act safely in strings.
Any unmatched delimiters inside of strings will be copied or deleted. This only
applies when `lispy-safe-delete', `lispy-safe-copy', and/or `lispy-safe-paste'
are non-nil."
:group 'lispy
:type 'boolean)
(defcustom lispy-safe-actions-ignore-comments t
"When non-nil, don't try to act safely in comments.
Any unmatched delimiters inside of comments will be copied or deleted. This only
applies when `lispy-safe-delete', `lispy-safe-copy', and/or `lispy-safe-paste'
are non-nil."
:group 'lispy
:type 'boolean)
(defcustom lispy-safe-actions-no-pull-delimiters-into-comments nil
"When non-nil, don't pull unmatched delimiters into comments when deleting.
This prevents the accidental unbalancing of expressions from commenting out
delimiters. This only applies when `lispy-safe-delete', `lispy-safe-copy',
and/or `lispy-safe-paste' are non-nil."
:group 'lispy
:type 'boolean)
(defcustom lispy-insert-space-after-wrap t
"When non-nil, insert a space after the point when wrapping.
This applies to the commands that use `lispy-pair'."
:group 'lispy
:type 'boolean)
(defcustom lispy-thread-last-macro "thread-last"
"Threading macro to use by default in command `lispy-thread-last'."
:type '(radio
(const :tag "Elisp" "thread-last")
(const :tag "Clojure" "->>")
(string :tag "Custom")))
(defun lispy-comment-char (&optional level postfix)
"Get the `comment-start' character, or `;' if nil.
Repeated LEVEL times concated with POSTFIX."
(concat
(apply #'concat (make-list (or level 1) (or comment-start ";")))
(or postfix "")))
(defun lispy-dir-string< (a b)
(if (string-match "/$" a)
(if (string-match "/$" b)
(string< a b)
t)
(if (string-match "/$" b)
nil
(string< a b))))
(defun lispy--normalize-files (fs)
(cl-sort
(cl-set-difference
fs
'("./" "../") :test #'equal)
#'lispy-dir-string<))
(defun lispy--completion-common-len (str)
(if (eq (get-text-property 0 'face str)
'completions-common-part)
(next-property-change 0 str)
0))
(defun lispy--complete-fname-1 (str pt)
"Try to complete a partial file name in STR at PT.
Depends on `default-directory'."
(with-temp-buffer
(insert str)
(comint-mode)
(let* ((com (comint-filename-completion))
(cands
(all-completions
(buffer-substring-no-properties
(nth 0 com)
(nth 1 com))
(nth 2 com))))
(when cands
(list (- pt (lispy--completion-common-len (car cands)))
pt
(delete
"../"
(delete
"./"
(all-completions
(buffer-substring-no-properties
(nth 0 com)
(nth 1 com))
(nth 2 com)))))))))
(defun lispy-complete-fname-at-point ()
"Completion source for `completion-at-point-functions'."
(when (lispy--in-string-p)
(let ((ini-bnd (bounds-of-thing-at-point 'filename)))
(if ini-bnd
(lispy--complete-fname-1
(buffer-substring-no-properties (car ini-bnd) (point))
(point))
(list (point) (point)
(lispy--normalize-files
(all-completions "" #'read-file-name-internal)))))))
(defconst lispy-font-lock-keywords
'(("^;; ?\\(\\*\\|\\*[^*\n].*\\)$" 1 'org-level-1 prepend)
("^;; ?\\(\\*\\{2\\}\\|\\*\\{2\\}[^*\n].*\\)$" 1 'org-level-2 prepend)
("^;; ?\\(\\*\\{3\\}\\|\\*\\{3\\}[^*\n].*\\)$" 1 'org-level-3 prepend)
("^;; ?\\(\\*\\{4\\}\\|\\*\\{4\\}[^*\n].*\\)$" 1 'org-level-4 prepend)
("^;; ?\\(\\*\\{5\\}\\|\\*\\{5\\}[^*\n].*\\)$" 1 'org-level-5 prepend)))
;;;###autoload
(define-minor-mode lispy-mode
"Minor mode for navigating and editing LISP dialects.
When `lispy-mode' is on, most unprefixed keys,
i.e. [a-zA-Z+-./<>], conditionally call commands instead of
self-inserting. The condition (called special further on) is one
of:
- the point is before \"(\"
- the point is after \")\"
- the region is active
For instance, when special, \"j\" moves down one sexp, otherwise
it inserts itself.
When special, [0-9] call `digit-argument'.
When `lispy-mode' is on, \"[\" and \"]\" move forward and
backward through lists, which is useful to move into special.
\\{lispy-mode-map}"
:keymap lispy-mode-map
:group 'lispy
:lighter " LY"
(if lispy-mode
(progn
(require 'eldoc)
(eldoc-remove-command 'special-lispy-eval)
(eldoc-remove-command 'special-lispy-x)
(eldoc-add-command 'lispy-space)
(when (called-interactively-p 'any)
(mapc #'lispy-raise-minor-mode
(cons 'lispy-mode lispy-known-verbs)))
(font-lock-add-keywords major-mode lispy-font-lock-keywords))
(font-lock-remove-keywords major-mode lispy-font-lock-keywords)))
(defun lispy-raise-minor-mode (mode)
"Make MODE the first on `minor-mode-map-alist'."
(let ((x (assq mode minor-mode-map-alist)))
(when x
(setq minor-mode-map-alist
(cons x (delq mode minor-mode-map-alist))))))
;;* Macros
(defmacro lispy-dotimes (n &rest bodyform)
"Execute N times the BODYFORM unless an error is signaled.
Return nil if couldn't execute BODYFORM at least once.
Otherwise return the amount of times executed."
(declare (indent 1)
(debug (form body)))
`(let ((i 0))
(catch 'result
(condition-case e
(progn
(while (<= (cl-incf i) ,n)
,@bodyform)
,n)
(error
(when (eq (car e) 'buffer-read-only)
(message "Buffer is read-only: %s" (current-buffer)))
(cl-decf i)
(and (> i 0) i))))))
(defmacro lispy-save-excursion (&rest body)
"More intuitive (`save-excursion' BODY)."
(declare (indent 0))
`(let ((out (save-excursion
,@body)))
(when (lispy-bolp)
(back-to-indentation))
out))
(defmacro lispy-from-left (&rest body)
"Ensure that BODY is executed from start of list."
(declare (debug (body)))
(let ((at-start (cl-gensym "at-start")))
`(let ((,at-start (lispy--leftp)))
(unless ,at-start
(lispy-different))
(unwind-protect
(lispy-save-excursion
,@body)
(unless (eq ,at-start (lispy--leftp))
(lispy-different))))))
(defmacro lispy-flet (binding &rest body)
"Temporarily override BINDING and execute BODY."
(declare (indent 1))
(let* ((name (car binding))
(old (cl-gensym (symbol-name name))))
`(let ((,old (symbol-function ',name)))
(unwind-protect
(progn
(fset ',name (lambda ,@(cdr binding)))
,@body)
(fset ',name ,old)))))
(defmacro lispy-multipop (lst n)
"Remove LST's first N elements and return them."
`(if (<= (length ,lst) ,n)
(prog1 ,lst
(setq ,lst nil))
(prog1 ,lst
(setcdr
(nthcdr (1- ,n) (prog1 ,lst (setq ,lst (nthcdr ,n ,lst))))
nil))))
(defvar lispy-whitespace-types '(clojure-commas)
"List of tokens to treat as whitespace")
(defvar lispy-site-directory (file-name-directory
load-file-name)
"The directory where all of the lispy files are located.")
;;* Verb related
(defun lispy-disable-verbs-except (verb)
"Disable all verbs except VERB."
(mapc
(lambda (v) (funcall v -1))
(remq verb lispy-known-verbs)))
(defun lispy-quit ()
"Remove modifiers."
(interactive)
(lispy-disable-verbs-except nil))
(defmacro lispy-defverb (name grammar)
"Define the verb NAME.
GRAMMAR is a list of nouns that work with this verb."
(let* ((sym (intern (format "lispy-%s-mode" name)))
(keymap (intern (format "lispy-%s-mode-map" name)))
(doc (format "%s verb.\n\n \\{lispy-%s-mode-map}"
(capitalize name) name))
(lighter (format " [%s]" name))
(verb (intern (format "lispy-%s-verb" name)))
(msg (format "[%s]: %s" name
(mapconcat #'car grammar " "))))
`(progn
(defvar ,sym nil
,(format "Non-nil if Lispy-%s mode is enabled.
Use the command `%s' to change this variable."
(capitalize name)
sym))
(make-variable-buffer-local ',sym)
(defvar ,keymap (make-sparse-keymap))
(defun ,sym (&optional arg)
,doc
(interactive (list (or current-prefix-arg 'toggle)))
(let ((last-message (current-message)))
(setq ,sym (if (eq arg 'toggle)
(not ,sym)
(> (prefix-numeric-value arg)
0)))
(cond (,sym (lispy-disable-verbs-except ',sym))
(t nil))
(if (called-interactively-p 'any)
(unless (and (current-message)
(not (equal last-message (current-message))))
(if ,sym
(when lispy-verbose-verbs
(message ,msg))
(message "")))))
(force-mode-line-update))
(mapc (lambda (x)
(lispy-define-key
,keymap
(car x) (cadr x)
:disable ',sym))
',grammar)
(unless (memq ',sym lispy-known-verbs)
(push ',sym lispy-known-verbs))
(defun ,verb ()
(interactive)
(if (bound-and-true-p ,sym)
(,sym -1)
(,sym 1)))
(with-no-warnings
(add-minor-mode ',sym ,lighter ,keymap nil nil)))))
;;* Globals: navigation
(defsubst lispy-right-p ()
"Return t if after variable `lispy-right'."
(looking-back lispy-right
(line-beginning-position)))
(defsubst lispy-left-p ()
"Return t if before variable `lispy-left'."
(looking-at lispy-left))
(defun lispy-forward (arg)
"Move forward list ARG times or until error.
Return t if moved at least once,
otherwise call function `lispy-right' and return nil."
(interactive "p")
(when (= arg 0)
(setq arg 2000))
(lispy--exit-string)
(let ((bnd (lispy--bounds-comment)))
(when bnd
(goto-char (1+ (cdr bnd)))))
(let ((pt (point))
(r (lispy-dotimes arg
(when (= (point) (point-max))
(error "Reached end of buffer"))
(forward-list))))
;; `forward-list' returns true at and of buffer
(if (or (null r)
(= pt (point))
(and (not (lispy-right-p))
(progn
(backward-list)
(forward-list)
(= pt (point)))))
(prog1 nil
(lispy--out-forward 1))
(point))))
(defun lispy-backward (arg)
"Move backward list ARG times or until error.
If couldn't move backward at least once, move up backward and return nil."
(interactive "p")
(when (= arg 0)
(setq arg 2000))
(lispy--exit-string)
(let ((bnd (lispy--bounds-comment)))
(when bnd
(goto-char (car bnd))))
(let ((pt (point))
(r (lispy-dotimes arg
(when (= (point) (point-min))
(error "Reached beginning of buffer"))
(backward-list))))
;; `backward-list' returns true at beginning of buffer
(if (or (null r)
(= pt (point))
(and (not (lispy-left-p))
(progn
(forward-list)
(backward-list)
(= pt (point)))))
(prog1 nil
(condition-case nil
(progn
(lispy--out-forward 1)
(backward-list))
(error
(progn
(goto-char pt)
(up-list -1)))))
(point))))
(defun lispy-right (arg)
"Move outside list forwards ARG times.
Return nil on failure, t otherwise."
(interactive "p")
(lispy--remember)
(when (bound-and-true-p abbrev-mode)
(ignore-errors (expand-abbrev)))
(cond ((region-active-p)
(lispy-mark-right arg))
(t
(lispy--out-forward arg))))
(defun lispy-right-nostring (arg)
"Call `lispy--out-forward' with ARG unless in string or comment.
Self-insert otherwise."
(interactive "p")
(if (or (lispy--in-string-or-comment-p)
(looking-back "?\\\\"
(line-beginning-position)))
(self-insert-command arg)
(lispy--out-forward arg)))
(defun lispy-left (arg)
"Move outside list forwards ARG times.
Return nil on failure, t otherwise."
(interactive "p")
(lispy--remember)
(cond ((region-active-p)
(lispy-mark-left arg))
(t
(or (lispy--out-backward arg)
(ignore-errors
(up-list -1))))))
(defun lispy-out-forward-newline (arg)
"Call `lispy--out-forward', then ARG times `newline-and-indent'."
(interactive "p")
(lispy--out-forward 1)
(lispy-dotimes arg
(newline-and-indent)))
(defun lispy--re-search-in-code (regexp direction &optional count)
"Move to the next REGEXP in DIRECTION, COUNT times.
DIRECTION is either \\='forward or \\='backward.
Return the amount of successful moves, or nil otherwise."
(setq count (or count 1))
(let ((to-move (abs count))
(advancer
(if (eq direction 'forward)
(if (> count 0)
#'re-search-forward
#'re-search-backward)
(if (> count 0)
#'re-search-backward
#'re-search-forward)))
(pt (point)))
(if (and (eq direction 'forward) (> count 0))
(when (looking-at regexp)
(goto-char (match-end 0))))
(while (and (> to-move 0)
(funcall advancer regexp nil t))
(unless (lispy--in-string-or-comment-p)
(cl-decf to-move)))
(if (= to-move (abs count))
(progn
(goto-char pt)
nil)
(if (eq direction 'forward)
(goto-char (match-beginning 0)))
(- count to-move))))
;;* Locals: navigation
(defun lispy-flow (arg)
"Move inside list ARG times.
Don't enter strings or comments.
Return nil if can't move."
(interactive "p")
(lispy--remember)
(let ((pt (point))
r)
(cond
((and (lispy-bolp)
(looking-at (lispy-comment-char)))
(setq r (lispy--re-search-in-code lispy-left 'forward arg)))
((lispy-left-p)
(setq r (lispy--re-search-in-code lispy-left 'forward arg)))
((lispy-right-p)
(backward-char)
(when (setq r (lispy--re-search-in-code lispy-right 'backward arg))
(forward-char))))
(or r
(progn
(goto-char pt)
nil))))
(defun lispy-down (arg)
"Move down ARG times inside current list."
(interactive "p")
(lispy--remember)
(cond ((region-active-p)
(let ((leftp (= (point) (region-beginning))))
(when leftp
(exchange-point-and-mark))
(cond ((save-excursion
(skip-chars-forward " \n")
(eobp)))
((lispy--symbolp (lispy--string-dwim))
(lispy-dotimes arg
(when (lispy-slurp 1)
(lispy-different)
(lispy-barf 1)
(lispy-different))))
((looking-at "[\n ]+\\(;\\)")
(deactivate-mark)
(goto-char (match-beginning 1))
(lispy--mark (lispy--bounds-comment)))
(t
(lispy-dotimes arg
(forward-sexp 1)
(lispy-different)
(if (lispy--in-comment-p)
(progn
(goto-char (1+ (cdr (lispy--bounds-comment))))
(skip-chars-forward "\n"))
(forward-sexp 2)
(forward-sexp -1))
(lispy-different))))
(when leftp
(exchange-point-and-mark))))
((lispy-left-p)
(lispy-forward arg)
(let ((pt (point))
(lispy-ignore-whitespace t))
(if (lispy-forward 1)
(lispy-backward 1)
(goto-char pt)
(lispy-different))))
((lispy-right-p)
(let ((pt (point)))
(unless (lispy-forward arg)
(goto-char pt))))
(t
(lispy-forward 1)
(lispy-backward 1)))
(lispy--ensure-visible))
(defun lispy-up (arg)
"Move up ARG times inside current list."
(interactive "p")
(lispy--remember)
(cond ((region-active-p)
(let ((leftp (= (point) (region-beginning))))
(unless leftp
(exchange-point-and-mark))
(cond ((save-excursion
(skip-chars-backward "\n ")
(bobp)))
((looking-back "^ *\\(;\\)[^\n]*[\n ]*"
(save-excursion
(ignore-errors
(backward-sexp 1))
(point)))
(deactivate-mark)
(goto-char (match-beginning 1))
(lispy--mark (lispy--bounds-comment))
(exchange-point-and-mark))
((lispy--symbolp (lispy--string-dwim))
(lispy-dotimes arg
(when (lispy-slurp 1)
(lispy-different)
(lispy-barf 1)
(lispy-different))))
(t
(lispy-dotimes arg
(backward-sexp 1)
(lispy-different)
(if (lispy--in-comment-p)
(progn
(goto-char (1- (car (lispy--bounds-comment))))
(skip-chars-backward "\n"))
(backward-sexp 2)
(backward-sexp -1))
(lispy-different))))
(unless leftp
(exchange-point-and-mark))))
((lispy-left-p)
(let ((pt (point)))
(unless (lispy-backward arg)
(goto-char pt))))
((lispy-right-p)
(lispy-backward arg)
(let ((pt (point)))
(if (lispy-backward 1)
(lispy-forward 1)
(goto-char pt)
(lispy-different))))
(t
(lispy-backward 1)
(lispy-forward 1)))
(lispy--ensure-visible))
(defvar lispy-pos-ring (make-ring 100)
"Ring for point/mark position and restriction history.")
(defun lispy--remember ()
"Store the current point and mark in history."
(let* ((emptyp (zerop (ring-length lispy-pos-ring)))
(top (unless emptyp
(ring-ref lispy-pos-ring 0)))
(restriction (when (buffer-narrowed-p)
(cons (set-marker (make-marker)
(point-min))
(set-marker (make-marker)
(point-max))))))
(if (region-active-p)
(let* ((bnd (lispy--bounds-dwim))
(bnd (cons
(move-marker (make-marker) (car bnd))
(move-marker (make-marker) (cdr bnd)))))
(when (or emptyp
(not (equal bnd top)))
(ring-insert lispy-pos-ring (list bnd restriction))))
(when (or emptyp
(not (equal (point-marker) top)))
(ring-insert lispy-pos-ring (list (point-marker) restriction))))))
(defvar lispy-back-restore-restriction t
"When non-nil, restore buffer restriction on `lispy-back'.")
(defun lispy-back (arg)
"Move point to ARGth previous position.
If position isn't special, move to previous or error."
(interactive "p")
(when (buffer-narrowed-p)
(widen))
(lispy-dotimes arg
(if (zerop (ring-length lispy-pos-ring))
(lispy-complain "At beginning of point history")
(let* ((data (ring-remove lispy-pos-ring 0))
(marker (pop data))
(restriction (pop data))
(beg (car restriction))
(end (cdr restriction)))
;; After deleting some text, markers that point to it converge
;; to one point
(while (and (not (zerop (ring-length lispy-pos-ring)))
(equal (ring-ref lispy-pos-ring 0)
marker))
(ring-remove lispy-pos-ring 0))
(if (consp marker)
(lispy--mark marker)
(deactivate-mark)
(switch-to-buffer (marker-buffer marker))
(goto-char marker))
(when (and lispy-back-restore-restriction
restriction)
(narrow-to-region beg end)
(set-marker beg nil)
(set-marker end nil))))))
(defun lispy-knight-down ()
"Make a knight-like move: down and right."
(interactive)
(cond ((lispy-right-p)
(lispy-different))
((lispy-left-p))
(t (lispy-backward 1)))
(let ((pt (point))
(bnd (save-excursion
(lispy-beginning-of-defun)
(lispy--bounds-list))))
(catch 'done
(while t
(forward-line)
(cond ((>= (point) (cdr bnd))
(goto-char pt)
(throw 'done nil))
((looking-at (concat "\\s-*" lispy-left))
(goto-char (1- (match-end 0)))
(throw 'done t)))))))
(defun lispy-knight-up ()
"Make a knight-like move: up and right."
(interactive)
(cond ((lispy-right-p)
(lispy-different))
((lispy-left-p))
(t (lispy-backward 1)))
(let ((pt (point))
(bnd (save-excursion
(lispy-beginning-of-defun)
(lispy--bounds-list))))