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authormattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
committermattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
commitbd18a38c2898548a3664a9ddab9f79c84f2caf4a (patch)
tree95b9933376770381bd8859782ae763be81c2d72b /elpa/evil-20220510.2302/evil-jumps.el
parentb07628dddf418d4f47b858e6c35fd3520fbaeed2 (diff)
parentef160dea332af4b4fe5e2717b962936c67e5fe9e (diff)
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-;;; evil-jumps.el --- Jump list implementation -*- lexical-binding: t -*-
-
-;; Author: Bailey Ling <bling at live.ca>
-
-;; Version: 1.15.0
-
-;;
-;; This file is NOT part of GNU Emacs.
-
-;;; License:
-
-;; This file is part of Evil.
-;;
-;; Evil 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.
-;;
-;; Evil 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 Evil. If not, see <http://www.gnu.org/licenses/>.
-
-(require 'cl-lib)
-(require 'evil-core)
-(require 'evil-states)
-
-;;; Code:
-
-(defgroup evil-jumps nil
- "Evil jump list configuration options."
- :prefix "evil-jumps"
- :group 'evil)
-
-(defcustom evil-jumps-cross-buffers t
- "When non-nil, the jump commands can cross borders between buffers, otherwise the jump commands act only within the current buffer."
- :type 'boolean
- :group 'evil-jumps)
-
-(defcustom evil-jumps-max-length 100
- "The maximum number of jumps to keep track of."
- :type 'integer
- :group 'evil-jumps)
-
-(defcustom evil-jumps-pre-jump-hook nil
- "Hooks to run just before jumping to a location in the jump list."
- :type 'hook
- :group 'evil-jumps)
-
-(defcustom evil-jumps-post-jump-hook nil
- "Hooks to run just after jumping to a location in the jump list."
- :type 'hook
- :group 'evil-jumps)
-
-(defcustom evil-jumps-ignored-file-patterns '("COMMIT_EDITMSG$" "TAGS$")
- "A list of pattern regexps to match on the file path to exclude from being included in the jump list."
- :type '(repeat string)
- :group 'evil-jumps)
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(defvar savehist-additional-variables)
-
-(defvar evil--jumps-jumping nil)
-
-(defvar evil--jumps-jumping-backward nil
- "Set by `evil--jump-backward', used and cleared in the
-`post-command-hook' by `evil--jump-handle-buffer-crossing'")
-
-(eval-when-compile (defvar evil--jumps-debug nil))
-
-(defvar evil--jumps-buffer-targets "\\*\\(new\\|scratch\\)\\*"
- "Regexp to match against `buffer-name' to determine whether it's a valid jump target.")
-
-(defvar evil--jumps-window-jumps (make-hash-table)
- "Hashtable which stores all jumps on a per window basis.")
-
-(defvar evil-jumps-history nil
- "History of `evil-mode' jumps that are persisted with `savehist'.")
-
-(cl-defstruct evil-jumps-struct
- ring
- (idx -1)
- previous-pos)
-
-;; Is inlining this really worth it?
-(defsubst evil--jumps-message (format &rest args)
- (when (eval-when-compile evil--jumps-debug)
- (with-current-buffer (get-buffer-create "*evil-jumps*")
- (goto-char (point-max))
- (insert (apply #'format format args) "\n"))))
-
-(defun evil--jumps-get-current (&optional window)
- (unless window
- (setq window (frame-selected-window)))
- (let* ((jump-struct (gethash window evil--jumps-window-jumps)))
- (unless jump-struct
- (setq jump-struct (make-evil-jumps-struct))
- (puthash window jump-struct evil--jumps-window-jumps))
- jump-struct))
-
-(defun evil--jumps-get-jumps (struct)
- (let ((ring (evil-jumps-struct-ring struct)))
- (unless ring
- (setq ring (make-ring evil-jumps-max-length))
- (setf (evil-jumps-struct-ring struct) ring))
- ring))
-
-(defun evil--jumps-get-window-jump-list ()
- (let ((struct (evil--jumps-get-current)))
- (evil--jumps-get-jumps struct)))
-
-(defun evil--jumps-savehist-load ()
- (add-to-list 'savehist-additional-variables 'evil-jumps-history)
- (let ((ring (make-ring evil-jumps-max-length)))
- (cl-loop for jump in (reverse evil-jumps-history)
- do (ring-insert ring jump))
- (setf (evil-jumps-struct-ring (evil--jumps-get-current)) ring))
- (add-hook 'savehist-save-hook #'evil--jumps-savehist-sync)
- (remove-hook 'savehist-mode-hook #'evil--jumps-savehist-load))
-
-(defun evil--jumps-savehist-sync ()
- "Updates the printable value of window jumps for `savehist'."
- (setq evil-jumps-history
- (delq nil (mapcar #'(lambda (jump)
- (let* ((mark (car jump))
- (pos (if (markerp mark)
- (marker-position mark)
- mark))
- (file-name (cadr jump)))
- (when (and (not (file-remote-p file-name))
- (file-exists-p file-name)
- pos)
- (list pos file-name))))
- (ring-elements (evil--jumps-get-window-jump-list))))))
-
-(defun evil--jumps-jump (idx shift)
- (let ((target-list (evil--jumps-get-window-jump-list)))
- (evil--jumps-message "jumping from %s by %s" idx shift)
- (evil--jumps-message "target list = %s" target-list)
- (setq idx (+ idx shift))
- (let* ((current-file-name (or (buffer-file-name) (buffer-name)))
- (size (ring-length target-list)))
- (unless evil-jumps-cross-buffers
- ;; skip jump marks pointing to other buffers
- (while (and (< idx size) (>= idx 0)
- (not (string= current-file-name (cadr (ring-ref target-list idx)))))
- (setq idx (+ idx shift))))
- (when (and (< idx size) (>= idx 0))
- ;; actual jump
- (run-hooks 'evil-jumps-pre-jump-hook)
- (let* ((place (ring-ref target-list idx))
- (pos (car place))
- (file-name (cadr place)))
- (setq evil--jumps-jumping t)
- (unless (string= current-file-name file-name)
- (if (string-match-p evil--jumps-buffer-targets file-name)
- (switch-to-buffer file-name)
- (find-file file-name)))
- (setq evil--jumps-jumping nil)
- (goto-char pos)
- (setf (evil-jumps-struct-idx (evil--jumps-get-current)) idx)
- (run-hooks 'evil-jumps-post-jump-hook))))))
-
-(defun evil--jumps-push ()
- "Pushes the current cursor/file position to the jump list."
- (let ((target-list (evil--jumps-get-window-jump-list)))
- (let ((file-name (buffer-file-name))
- (buffer-name (buffer-name))
- (current-pos (point-marker))
- (first-pos nil)
- (first-file-name nil)
- (excluded nil))
- (when (and (not file-name)
- (string-match-p evil--jumps-buffer-targets buffer-name))
- (setq file-name buffer-name))
- (when file-name
- (dolist (pattern evil-jumps-ignored-file-patterns)
- (when (string-match-p pattern file-name)
- (setq excluded t)))
- (unless excluded
- (unless (ring-empty-p target-list)
- (setq first-pos (car (ring-ref target-list 0)))
- (setq first-file-name (car (cdr (ring-ref target-list 0)))))
- (unless (and (equal first-pos current-pos)
- (equal first-file-name file-name))
- (evil--jumps-message "pushing %s on %s" current-pos file-name)
- (ring-insert target-list `(,current-pos ,file-name))))))
- (evil--jumps-message "%s %s"
- (selected-window)
- (and (not (ring-empty-p target-list))
- (ring-ref target-list 0)))))
-
-(evil-define-command evil-show-jumps ()
- "Display the contents of the jump list."
- :repeat nil
- (evil-with-view-list
- :name "evil-jumps"
- :mode "Evil Jump List"
- :format [("Jump" 5 nil)
- ("Marker" 8 nil)
- ("File/text" 1000 t)]
- :entries (let* ((jumps (evil--jumps-savehist-sync))
- (count 0))
- (cl-loop for jump in jumps
- collect `(nil [,(number-to-string (cl-incf count))
- ,(number-to-string (car jump))
- (,(cadr jump))])))
- :select-action #'evil--show-jumps-select-action))
-
-(defun evil--show-jumps-select-action (jump)
- (let ((position (string-to-number (elt jump 1)))
- (file (car (elt jump 2))))
- (kill-buffer)
- (switch-to-buffer (find-file file))
- (goto-char position)))
-
-(defun evil-set-jump (&optional pos)
- "Set jump point at POS.
-POS defaults to point."
- (save-excursion
- (when (markerp pos)
- (set-buffer (marker-buffer pos)))
-
- (unless (or (region-active-p) (evil-visual-state-p))
- (push-mark pos t))
-
- (unless evil--jumps-jumping
- ;; clear out intermediary jumps when a new one is set
- (let* ((struct (evil--jumps-get-current))
- (target-list (evil--jumps-get-jumps struct))
- (idx (evil-jumps-struct-idx struct)))
- (cl-loop repeat idx
- do (ring-remove target-list))
- (setf (evil-jumps-struct-idx struct) -1))
- (when pos
- (goto-char pos))
- (evil--jumps-push))))
-
-(defun evil--jump-backward (count)
- (setq evil--jumps-jumping-backward t)
- (let ((count (or count 1)))
- (evil-motion-loop (nil count)
- (let* ((struct (evil--jumps-get-current))
- (idx (evil-jumps-struct-idx struct)))
- (evil--jumps-message "jumping back %s" idx)
- (when (= idx -1)
- (setq idx 0)
- (setf (evil-jumps-struct-idx struct) 0)
- (evil--jumps-push))
- (evil--jumps-jump idx 1)))))
-
-(defun evil--jump-forward (count)
- (let ((count (or count 1)))
- (evil-motion-loop (nil count)
- (let* ((struct (evil--jumps-get-current))
- (idx (evil-jumps-struct-idx struct)))
- (when (= idx -1)
- (setq idx 0)
- (setf (evil-jumps-struct-idx struct) 0)
- (evil--jumps-push))
- (evil--jumps-jump idx -1)))))
-
-(defun evil--jumps-window-configuration-hook (&rest _args)
- (let* ((window-list (window-list-1 nil nil t))
- (existing-window (selected-window))
- (new-window (previous-window)))
- (when (and (not (eq existing-window new-window))
- (> (length window-list) 1))
- (let* ((target-jump-struct (evil--jumps-get-current new-window)))
- (if (not (ring-empty-p (evil--jumps-get-jumps target-jump-struct)))
- (evil--jumps-message "target window %s already has %s jumps" new-window
- (ring-length (evil--jumps-get-jumps target-jump-struct)))
- (evil--jumps-message "new target window detected; copying %s to %s" existing-window new-window)
- (let* ((source-jump-struct (evil--jumps-get-current existing-window))
- (source-list (evil--jumps-get-jumps source-jump-struct)))
- (when (= (ring-length (evil--jumps-get-jumps target-jump-struct)) 0)
- (setf (evil-jumps-struct-previous-pos target-jump-struct) (evil-jumps-struct-previous-pos source-jump-struct))
- (setf (evil-jumps-struct-idx target-jump-struct) (evil-jumps-struct-idx source-jump-struct))
- (setf (evil-jumps-struct-ring target-jump-struct) (ring-copy source-list)))))))
- ;; delete obsolete windows
- (maphash (lambda (key _val)
- (unless (member key window-list)
- (evil--jumps-message "removing %s" key)
- (remhash key evil--jumps-window-jumps)))
- evil--jumps-window-jumps)))
-
-(defun evil--jump-hook (&optional command)
- "`pre-command-hook' for evil-jumps.
-Set jump point if COMMAND has a non-nil `:jump' property. Otherwise,
-save the current position in case the command being executed will
-change the current buffer."
- (setq command (or command this-command))
- (if (evil-get-command-property command :jump)
- (evil-set-jump)
- (setf (evil-jumps-struct-previous-pos (evil--jumps-get-current))
- (point-marker))))
-
-(defun evil--jump-handle-buffer-crossing ()
- (let ((jumping-backward evil--jumps-jumping-backward))
- (setq evil--jumps-jumping-backward nil)
- (dolist (frame (frame-list))
- (dolist (window (window-list frame))
- (let* ((struct (evil--jumps-get-current window))
- (previous-pos (evil-jumps-struct-previous-pos struct)))
- (when previous-pos
- (setf (evil-jumps-struct-previous-pos struct) nil)
- (if (and
- ;; `evil-jump-backward' (and other backward jumping
- ;; commands) needs to be handled specially. When
- ;; jumping backward multiple times, calling
- ;; `evil-set-jump' is always wrong: If you jump back
- ;; twice and we call `evil-set-jump' after the second
- ;; time, we clear the forward jump list and
- ;; `evil--jump-forward' won't work.
-
- ;; The first time you jump backward, setting a jump
- ;; point is sometimes correct. But we don't do it
- ;; here because this function is called after
- ;; `evil--jump-backward' has updated our position in
- ;; the jump list so, again, `evil-set-jump' would
- ;; break `evil--jump-forward'.
- (not jumping-backward)
- (let ((previous-buffer (marker-buffer previous-pos)))
- (and previous-buffer
- (not (eq previous-buffer (window-buffer window))))))
- (evil-set-jump previous-pos)
- (set-marker previous-pos nil))))))))
-
-(if (bound-and-true-p savehist-loaded)
- (evil--jumps-savehist-load)
- (add-hook 'savehist-mode-hook #'evil--jumps-savehist-load))
-
-(defun evil--jumps-install-or-uninstall ()
- (if evil-local-mode
- (progn
- (add-hook 'pre-command-hook #'evil--jump-hook nil t)
- (add-hook 'post-command-hook #'evil--jump-handle-buffer-crossing nil t)
- (add-hook 'next-error-hook #'evil-set-jump nil t)
- (add-hook 'window-configuration-change-hook #'evil--jumps-window-configuration-hook nil t))
- (remove-hook 'pre-command-hook #'evil--jump-hook t)
- (remove-hook 'post-command-hook #'evil--jump-handle-buffer-crossing t)
- (remove-hook 'next-error-hook #'evil-set-jump t)
- (remove-hook 'window-configuration-change-hook #'evil--jumps-window-configuration-hook t)
- (evil--jump-handle-buffer-crossing)))
-
-(add-hook 'evil-local-mode-hook #'evil--jumps-install-or-uninstall)
-
-(provide 'evil-jumps)
-
-;;; evil-jumps.el ends here