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;;; helm-comint.el --- Comint prompt navigation for helm. -*- lexical-binding: t -*-
;; Copyright (C) 2020 Pierre Neidhardt <mail@ambrevar.xyz>
;; 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:
;;
;; You can bind this as follows in .emacs:
;;
;; (add-hook 'comint-mode-hook
;; (lambda ()
;; (define-key comint-mode-map (kbd "M-s f") 'helm-comint-prompts-all)))
;;; Code:
(require 'cl-lib)
(require 'helm)
(require 'helm-lib)
(require 'helm-help)
(require 'helm-elisp)
;;; Comint prompts
;;
(defface helm-comint-prompts-promptidx
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
(:foreground "cyan")))
"Face used to highlight comint prompt index."
:group 'helm-comint-faces)
(defface helm-comint-prompts-buffer-name
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
(:foreground "green")))
"Face used to highlight comint buffer name."
:group 'helm-comint-faces)
(defcustom helm-comint-prompts-promptidx-p t
"Show prompt number."
:group 'helm-comint
:type 'boolean)
(defcustom helm-comint-mode-list '(comint-mode slime-repl-mode sly-mrepl-mode sql-interactive-mode)
"Supported modes for prompt navigation.
Derived modes (e.g., Geiser's REPL) are automatically supported."
:group 'helm-comint
:type '(repeat (choice symbol)))
(defcustom helm-comint-next-prompt-function '((sly-mrepl-mode . (lambda ()
(sly-mrepl-next-prompt)
(point))))
"Alist of (MODE . NEXT-PROMPT-FUNCTION) to use.
If the current major mode is a key in this list, the associated
function will be used to navigate the prompts.
The function must return the point after the prompt.
Otherwise (comint-next-prompt 1) will be used."
:group 'helm-comint
:type '(alist :key-type symbol :value-type function))
(defcustom helm-comint-max-offset 400
"Max number of chars displayed per candidate in comint-input-ring browser.
When t, don't truncate candidate, show all.
By default it is approximatively the number of bits contained in
five lines of 80 chars each i.e 80*5.
Note that if you set this to nil multiline will be disabled, i.e
you will not have anymore separators between candidates."
:type '(choice (const :tag "Disabled" t)
(integer :tag "Max candidate offset"))
:group 'helm-misc)
(defvar helm-comint-prompts-keymap
(let ((map (make-sparse-keymap)))
(set-keymap-parent map helm-map)
(define-key map (kbd "C-c o") 'helm-comint-prompts-other-window)
(define-key map (kbd "C-c C-o") 'helm-comint-prompts-other-frame)
map)
"Keymap for `helm-comint-prompt-all'.")
(defun helm-comint-prompts-list (mode &optional buffer)
"List the prompts in BUFFER in mode MODE.
Return a list of (\"prompt\" (point) (buffer-name) prompt-index))
E.g. (\"ls\" 162 \"*shell*\" 3).
If BUFFER is nil, use current buffer."
(with-current-buffer (or buffer (current-buffer))
(when (derived-mode-p mode)
(save-excursion
(goto-char (point-min))
(let (result (count 1))
(save-mark-and-excursion
(helm-awhile (and (not (eobp))
(helm-aif (alist-get major-mode helm-comint-next-prompt-function)
(funcall it)
(comint-next-prompt 1)))
(push (list (buffer-substring-no-properties
it (point-at-eol))
it (buffer-name) count)
result)
(setq count (1+ count))))
(nreverse result))))))
(defun helm-comint-prompts-list-all (mode)
"List the prompts of all buffers in mode MODE.
See `helm-comint-prompts-list'."
(cl-loop for b in (buffer-list)
append (helm-comint-prompts-list mode b)))
(defun helm-comint-prompts-transformer (candidates &optional all)
;; ("ls" 162 "*shell*" 3) => ("*shell*:3:ls" . ("ls" 162 "*shell*" 3))
(cl-loop for (prt pos buf id) in candidates
collect `(,(concat
(when all
(concat (propertize
buf
'face 'helm-comint-prompts-buffer-name)
":"))
(when helm-comint-prompts-promptidx-p
(concat (propertize
(number-to-string id)
'face 'helm-comint-prompts-promptidx)
":"))
prt)
. ,(list prt pos buf id))))
(defun helm-comint-prompts-all-transformer (candidates)
(helm-comint-prompts-transformer candidates t))
(cl-defun helm-comint-prompts-goto (candidate &optional (action 'switch-to-buffer))
;; Candidate format: ("ls" 162 "*shell*" 3)
(let ((buf (nth 2 candidate)))
(unless (and (string= (buffer-name) buf)
(eq action 'switch-to-buffer))
(funcall action buf))
(goto-char (nth 1 candidate))
(recenter)))
(defun helm-comint-prompts-goto-other-window (candidate)
(helm-comint-prompts-goto candidate 'switch-to-buffer-other-window))
(defun helm-comint-prompts-goto-other-frame (candidate)
(helm-comint-prompts-goto candidate 'switch-to-buffer-other-frame))
(defun helm-comint-prompts-other-window ()
(interactive)
(with-helm-alive-p
(helm-exit-and-execute-action 'helm-comint-prompts-goto-other-window)))
(put 'helm-comint-prompts-other-window 'helm-only t)
(defun helm-comint-prompts-other-frame ()
(interactive)
(with-helm-alive-p
(helm-exit-and-execute-action 'helm-comint-prompts-goto-other-frame)))
(put 'helm-comint-prompts-other-frame 'helm-only t)
;;;###autoload
(defun helm-comint-prompts ()
"Pre-configured `helm' to browse the prompts of the current comint buffer."
(interactive)
(if (apply 'derived-mode-p helm-comint-mode-list)
(helm :sources
(helm-build-sync-source "Comint prompts"
:candidates (helm-comint-prompts-list major-mode)
:candidate-transformer 'helm-comint-prompts-transformer
:action '(("Go to prompt" . helm-comint-prompts-goto)))
:buffer "*helm comint prompts*")
(message "Current buffer is not a comint buffer")))
;;;###autoload
(defun helm-comint-prompts-all ()
"Pre-configured `helm' to browse the prompts of all comint sessions."
(interactive)
(if (apply 'derived-mode-p helm-comint-mode-list)
(helm :sources
(helm-build-sync-source "All comint prompts"
:candidates (helm-comint-prompts-list-all major-mode)
:candidate-transformer 'helm-comint-prompts-all-transformer
:action (quote (("Go to prompt" . helm-comint-prompts-goto)
("Go to prompt in other window `C-c o`" .
helm-comint-prompts-goto-other-window)
("Go to prompt in other frame `C-c C-o`" .
helm-comint-prompts-goto-other-frame)))
:keymap helm-comint-prompts-keymap)
:buffer "*helm comint all prompts*")
(message "Current buffer is not a comint buffer")))
;;; Comint history
;;
;;
(defun helm-comint-input-ring-action (candidate)
"Default action for comint history."
(with-helm-current-buffer
(delete-region (comint-line-beginning-position) (point-max))
(insert candidate)))
(defvar helm-source-comint-input-ring
(helm-build-sync-source "Comint history"
:candidates (lambda ()
(with-helm-current-buffer
(cl-loop for elm in (ring-elements comint-input-ring)
unless (string= elm "")
collect elm)))
:action 'helm-comint-input-ring-action
;; Multiline does not work for `shell' because of an Emacs bug.
;; It works in other REPLs like Geiser.
:multiline 'helm-comint-max-offset)
"Source that provides Helm completion against `comint-input-ring'.")
;;;###autoload
(defun helm-comint-input-ring ()
"Preconfigured `helm' that provide completion of `comint' history."
(interactive)
(when (or (derived-mode-p 'comint-mode)
(member major-mode helm-comint-mode-list))
(helm :sources 'helm-source-comint-input-ring
:input (buffer-substring-no-properties (comint-line-beginning-position)
(point-at-eol))
:buffer "*helm comint history*")))
(provide 'helm-comint)
;;; helm-comint.el ends here
|
