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