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Diffstat (limited to 'elpa/evil-20220503.1314/evil-jumps.el')
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diff --git a/elpa/evil-20220503.1314/evil-jumps.el b/elpa/evil-20220503.1314/evil-jumps.el new file mode 100644 index 0000000..fea2e43 --- /dev/null +++ b/elpa/evil-20220503.1314/evil-jumps.el @@ -0,0 +1,354 @@ +;;; 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 |