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;;; cider-selector.el --- Buffer selection command inspired by SLIME's selector -*- lexical-binding: t -*-
;; Copyright © 2012-2013 Tim King, Phil Hagelberg, Bozhidar Batsov
;; Copyright © 2013-2018 Bozhidar Batsov, Artur Malabarba and CIDER contributors
;;
;; Author: Tim King <kingtim@gmail.com>
;; Phil Hagelberg <technomancy@gmail.com>
;; Bozhidar Batsov <bozhidar@batsov.com>
;; Artur Malabarba <bruce.connor.am@gmail.com>
;; Hugo Duncan <hugo@hugoduncan.org>
;; Steve Purcell <steve@sanityinc.com>
;; 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/>.
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Buffer selection command inspired by SLIME's selector.
;;; Code:
(require 'cider-client)
(require 'cider-eval)
(require 'cider-scratch)
(require 'cider-profile)
(defconst cider-selector-help-buffer "*CIDER Selector Help*"
"The name of the selector's help buffer.")
(defvar cider-selector-methods nil
"List of buffer-selection methods for the `cider-selector' command.
Each element is a list (KEY DESCRIPTION FUNCTION).
DESCRIPTION is a one-line description of what the key selects.")
(defvar cider-selector-other-window nil
"If non-nil use `switch-to-buffer-other-window'.
Not meant to be set by users. It's used internally
by `cider-selector'.")
(defun cider-selector--recently-visited-buffer (mode)
"Return the most recently visited buffer, deriving its `major-mode' from MODE.
Only considers buffers that are not already visible."
(cl-loop for buffer in (buffer-list)
when (and (with-current-buffer buffer
(derived-mode-p mode))
;; names starting with space are considered hidden by Emacs
(not (string-match-p "^ " (buffer-name buffer)))
(null (get-buffer-window buffer 'visible)))
return buffer
finally (error "Can't find unshown buffer in %S" mode)))
;;;###autoload
(defun cider-selector (&optional other-window)
"Select a new buffer by type, indicated by a single character.
The user is prompted for a single character indicating the method by
which to choose a new buffer. The `?' character describes then
available methods. OTHER-WINDOW provides an optional target.
See `def-cider-selector-method' for defining new methods."
(interactive)
(message "Select [%s]: "
(apply #'string (mapcar #'car cider-selector-methods)))
(let* ((cider-selector-other-window other-window)
(ch (save-window-excursion
(select-window (minibuffer-window))
(read-char)))
(method (cl-find ch cider-selector-methods :key #'car)))
(cond (method
(funcall (cl-caddr method)))
(t
(message "No method for character: ?\\%c" ch)
(ding)
(sleep-for 1)
(discard-input)
(cider-selector)))))
(defmacro def-cider-selector-method (key description &rest body)
"Define a new `cider-select' buffer selection method.
KEY is the key the user will enter to choose this method.
DESCRIPTION is a one-line sentence describing how the method
selects a buffer.
BODY is a series of forms which are evaluated when the selector
is chosen. The returned buffer is selected with
`switch-to-buffer'."
(let ((method `(lambda ()
(let ((buffer (progn ,@body)))
(cond ((not (get-buffer buffer))
(message "No such buffer: %S" buffer)
(ding))
((get-buffer-window buffer)
(select-window (get-buffer-window buffer)))
(cider-selector-other-window
(switch-to-buffer-other-window buffer))
(t
(switch-to-buffer buffer)))))))
`(setq cider-selector-methods
(cl-sort (cons (list ,key ,description ,method)
(cl-remove ,key cider-selector-methods :key #'car))
#'< :key #'car))))
(def-cider-selector-method ?? "Selector help buffer."
(ignore-errors (kill-buffer cider-selector-help-buffer))
(with-current-buffer (get-buffer-create cider-selector-help-buffer)
(insert "CIDER Selector Methods:\n\n")
(cl-loop for (key line nil) in cider-selector-methods
do (insert (format "%c:\t%s\n" key line)))
(goto-char (point-min))
(help-mode)
(display-buffer (current-buffer) t))
(cider-selector)
(current-buffer))
(cl-pushnew (list ?4 "Select in other window" (lambda () (cider-selector t)))
cider-selector-methods :key #'car)
(def-cider-selector-method ?c
"Most recently visited clojure-mode buffer."
(cider-selector--recently-visited-buffer 'clojure-mode))
(def-cider-selector-method ?e
"Most recently visited emacs-lisp-mode buffer."
(cider-selector--recently-visited-buffer 'emacs-lisp-mode))
(def-cider-selector-method ?q "Abort."
(top-level))
(def-cider-selector-method ?r
"Current REPL buffer."
(cider-current-repl))
(def-cider-selector-method ?m
"Current connection's *nrepl-messages* buffer."
(nrepl-messages-buffer (cider-current-repl)))
(def-cider-selector-method ?x
"*cider-error* buffer."
cider-error-buffer)
(def-cider-selector-method ?p
"CIDER profiler buffer."
cider-profile-buffer)
(def-cider-selector-method ?d
"*cider-doc* buffer."
cider-doc-buffer)
(def-cider-selector-method ?s
"*cider-scratch* buffer."
(cider-scratch-find-or-create-buffer))
(provide 'cider-selector)
;;; cider-selector.el ends here
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