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;;; em-prompt.el --- command prompts -*- lexical-binding:t -*-
;; Copyright (C) 1999-2025 Free Software Foundation, Inc.
;; Author: John Wiegley <johnw@gnu.org>
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Most of the prompt navigation commands of `comint-mode' are
;; supported, such as C-c C-n, C-c C-p, etc.
;;; Code:
(require 'esh-mode)
(require 'text-property-search)
;;;###esh-module-autoload
(progn
(defgroup eshell-prompt nil
"This module provides command prompts, and navigation between them,
as is common with most shells."
:tag "Command prompts"
:group 'eshell-module))
;;; User Variables:
(defcustom eshell-prompt-load-hook nil
"A list of functions to call when loading `eshell-prompt'."
:version "24.1" ; removed eshell-prompt-initialize
:type 'hook
:group 'eshell-prompt)
(autoload 'eshell/pwd "em-dirs")
(defcustom eshell-prompt-function
(lambda ()
(concat (abbreviate-file-name (eshell/pwd))
(unless (eshell-exit-success-p)
(format " [%d]" eshell-last-command-status))
(if (= (file-user-uid) 0) " # " " $ ")))
"A function that returns the Eshell prompt string."
:type 'function
:group 'eshell-prompt)
(defcustom eshell-prompt-regexp "^[^#$\n]* [#$] "
"A regexp which fully matches your Eshell prompt."
:type 'regexp
:group 'eshell-prompt)
(make-obsolete-variable 'eshell-prompt-regexp nil "30.1")
(defcustom eshell-highlight-prompt t
"If non-nil, Eshell should highlight the prompt."
:type 'boolean
:group 'eshell-prompt)
(defface eshell-prompt
'((default :weight bold)
(((class color) (background light)) :foreground "Red")
(((class color) (background dark)) :foreground "Pink"))
"The face used to highlight prompt strings.
For highlighting other kinds of strings -- similar to shell mode's
behavior -- simply use an output filer which changes text properties."
:group 'eshell-prompt)
(defcustom eshell-before-prompt-hook nil
"A list of functions to call before outputting the prompt."
:type 'hook
:options '(eshell-begin-on-new-line)
:group 'eshell-prompt)
(defcustom eshell-after-prompt-hook nil
"A list of functions to call after outputting the prompt.
Note that if `eshell-scroll-show-maximum-output' is non-nil, then
setting `eshell-show-maximum-output' here won't do much. It depends
on whether the user wants the resizing to happen while output is
arriving, or after."
:type 'hook
:options '(eshell-show-maximum-output)
:group 'eshell-prompt)
(defvar-keymap eshell-prompt-mode-map
"C-c C-n" #'eshell-next-prompt
"C-c C-p" #'eshell-previous-prompt
"<remap> <forward-paragraph>" #'eshell-forward-paragraph
"<remap> <backward-paragraph>" #'eshell-backward-paragraph)
(defvar-keymap eshell-prompt-repeat-map
:doc "Keymap to repeat eshell-prompt key sequences. Used in `repeat-mode'."
:repeat t
"C-n" #'eshell-next-prompt
"C-p" #'eshell-previous-prompt)
;;; Functions:
(define-minor-mode eshell-prompt-mode
"Minor mode for eshell-prompt module.
\\{eshell-prompt-mode-map}"
:keymap eshell-prompt-mode-map)
(defun eshell-prompt-initialize () ;Called from `eshell-mode' via intern-soft!
"Initialize the prompting code."
(unless eshell-non-interactive-p
(add-hook 'eshell-post-command-hook 'eshell-emit-prompt nil t)
(eshell-prompt-mode)))
(defun eshell-emit-prompt ()
"Emit a prompt if eshell is being used interactively."
(when (boundp 'ansi-color-context-region)
(setq ansi-color-context-region nil))
(run-hooks 'eshell-before-prompt-hook)
(if (not eshell-prompt-function)
(set-marker eshell-last-output-end (point))
(let ((prompt (funcall eshell-prompt-function)))
(add-text-properties
0 (length prompt)
(if eshell-highlight-prompt
'( read-only t
field prompt
font-lock-face eshell-prompt
front-sticky (read-only field font-lock-face)
rear-nonsticky (read-only field font-lock-face))
'( field prompt
front-sticky (field)
rear-nonsticky (field)))
prompt)
(eshell-interactive-filter nil prompt)))
(run-hooks 'eshell-after-prompt-hook))
(defun eshell-forward-matching-input (regexp arg)
"Search forward through buffer for command input that matches REGEXP.
With prefix argument N, search for Nth next match. If N is
negative, find the Nth previous match."
(interactive (eshell-regexp-arg "Forward input matching (regexp): "))
(let ((direction (if (> arg 0) 1 -1))
(count (abs arg)))
(unless (catch 'found
(while (> count 0)
(eshell-next-prompt direction)
(when (and (string-match regexp (field-string))
(= (setq count (1- count)) 0))
(throw 'found t))))
(message "Not found")
(ding))))
(defun eshell-backward-matching-input (regexp arg)
"Search backward through buffer for command input that matches REGEXP.
With prefix argument N, search for Nth previous match. If N is
negative, find the Nth next match."
(interactive (eshell-regexp-arg "Backward input matching (regexp): "))
(eshell-forward-matching-input regexp (- arg)))
(defun eshell-forward-paragraph (&optional n)
"Move to the beginning of the Nth next prompt in the buffer.
Like `forward-paragraph', but also stops at the beginning of each prompt."
(interactive "p")
(unless n (setq n 1))
(let (;; We'll handle the "paragraph" starts ourselves.
(paragraph-start regexp-unmatchable)
(inhibit-field-text-motion t))
(cond
((> n 0)
(while (and (> n 0) (< (point) (point-max)))
(let ((next-paragraph (save-excursion (forward-paragraph) (point)))
(next-prompt (save-excursion
(if-let ((match (text-property-search-forward
'field 'prompt t t)))
(prop-match-beginning match)
(point-max)))))
(goto-char (min next-paragraph next-prompt)))
(setq n (1- n))))
((< n 0)
(while (and (< n 0) (> (point) (point-min)))
(let ((prev-paragraph (save-excursion (backward-paragraph) (point)))
(prev-prompt (save-excursion
(if (text-property-search-backward
'field 'prompt t)
(point)
(point-min)))))
(goto-char (max prev-paragraph prev-prompt)))
(setq n (1+ n)))))))
(defun eshell-backward-paragraph (&optional n)
"Move to the beginning of the Nth previous prompt in the buffer.
Like `backward-paragraph', but navigates using fields."
(interactive "p")
(eshell-forward-paragraph (- (or n 1))))
(defun eshell-next-prompt (&optional n)
"Move to end of Nth next prompt in the buffer."
(interactive "p")
(unless n (setq n 1))
;; First, move point to our starting position: the end of the
;; current prompt (aka the beginning of the input), if any. (The
;; welcome message and output from commands don't count as having a
;; current prompt.)
(pcase (get-text-property (point) 'field)
('command-output)
('prompt (goto-char (field-end)))
(_ (when-let ((match (text-property-search-backward 'field 'prompt t)))
(goto-char (prop-match-end match)))))
;; Now, move forward/backward to our destination prompt.
(if (natnump n)
(while (and (> n 0)
(text-property-search-forward 'field 'prompt t))
(setq n (1- n)))
(let (match this-match)
;; Go to the beginning of the current prompt.
(goto-char (field-beginning (point) t))
(while (and (< n 0)
(setq this-match (text-property-search-backward
'field 'prompt t)))
(setq match this-match
n (1+ n)))
(when match
(goto-char (prop-match-end match))))))
(defun eshell-previous-prompt (&optional n)
"Move to end of Nth previous prompt in the buffer."
(interactive "p")
(eshell-next-prompt (- (or n 1))))
(defun eshell-skip-prompt ()
"Skip past the text matching regexp `eshell-prompt-regexp'.
If this takes us past the end of the current line, don't skip at all."
(declare (obsolete nil "30.1"))
(let ((eol (line-end-position)))
(if (and (looking-at eshell-prompt-regexp)
(<= (match-end 0) eol))
(goto-char (match-end 0)))))
(defun eshell-bol-ignoring-prompt (arg)
"Move point to the beginning of the current line, past the prompt (if any).
With argument ARG not nil or 1, move forward ARG - 1 lines
first (see `move-beginning-of-line' for more information)."
(interactive "^p")
(let ((inhibit-field-text-motion t))
(move-beginning-of-line arg)))
(provide 'em-prompt)
;;; em-prompt.el ends here
|
