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;;; cider-macroexpansion.el --- Macro expansion support -*- lexical-binding: t -*-
;; Copyright © 2012-2014 Tim King, Phil Hagelberg
;; Copyright © 2013-2014 Bozhidar Batsov, Hugo Duncan, Steve Purcell
;;
;; Author: Tim King <kingtim@gmail.com>
;; Phil Hagelberg <technomancy@gmail.com>
;; Bozhidar Batsov <bozhidar@batsov.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:
;; Macro expansion support.
;;; Code:
(require 'cider-mode)
(defconst cider-macroexpansion-buffer "*cider-macroexpansion*")
(push cider-macroexpansion-buffer cider-ancilliary-buffers)
(defcustom cider-macroexpansion-suppress-namespaces nil
"When non-nil namespaces won't be displayed in the macroexpansion buffer."
:type 'boolean
:group 'cider
:package-version '(cider . "0.7.0"))
(defun cider-macroexpand-undo (&optional arg)
"Undo the last macroexpansion, using `undo-only'.
ARG is passed along to `undo-only'."
(interactive)
(let ((inhibit-read-only t))
(undo-only arg)))
(defvar cider-last-macroexpand-expression nil
"Specify the last macroexpansion preformed.
This variable specifies both what was expanded and the expander.")
(defun cider-macroexpansion (expander expr)
"Macroexpand, using EXPANDER, the given EXPR."
(cider-ensure-op-supported expander)
(plist-get (nrepl-send-request-sync
(list "op" expander
"code" expr
"ns" (cider-current-ns)
"suppress-namespaces" cider-macroexpansion-suppress-namespaces)) :value))
(defun cider-macroexpand-expr (expander expr)
"Macroexpand, use EXPANDER, the given EXPR."
(let* ((expansion (cider-macroexpansion expander expr)))
(setq cider-last-macroexpand-expression expr)
(cider-initialize-macroexpansion-buffer expansion (cider-current-ns))))
(defun cider-macroexpand-expr-inplace (expander)
"Substitute the form preceding point with its macroexpansion using EXPANDER."
(interactive)
(let* ((expansion (cider-macroexpansion expander (cider-last-sexp)))
(bounds (cons (save-excursion (backward-sexp) (point)) (point))))
(cider-redraw-macroexpansion-buffer
expansion (current-buffer) (car bounds) (cdr bounds) (point))))
(defun cider-macroexpand-again ()
"Repeat the last macroexpansion."
(interactive)
(cider-initialize-macroexpansion-buffer cider-last-macroexpand-expression nrepl-buffer-ns))
;;;###autoload
(defun cider-macroexpand-1 (&optional prefix)
"Invoke 'macroexpand-1' on the expression preceding point.
If invoked with a PREFIX argument, use 'macroexpand' instead of
'macroexpand-1'."
(interactive "P")
(let ((expander (if prefix "macroexpand" "macroexpand-1")))
(cider-macroexpand-expr expander (cider-last-sexp))))
(defun cider-macroexpand-1-inplace (&optional prefix)
"Perform inplace 'macroexpand-1' on the expression preceding point.
If invoked with a PREFIX argument, use 'macroexpand' instead of
'macroexpand-1'."
(interactive "P")
(let ((expander (if prefix "macroexpand" "macroexpand-1")))
(cider-macroexpand-expr-inplace expander)))
;;;###autoload
(defun cider-macroexpand-all ()
"Invoke 'clojure.walk/macroexpand-all' on the expression preceding point."
(interactive)
(cider-macroexpand-expr "macroexpand-all" (cider-last-sexp)))
(defun cider-macroexpand-all-inplace ()
"Perform inplace 'clojure.walk/macroexpand-all' on the expression preceding point."
(interactive)
(cider-macroexpand-expr-inplace "macroexpand-all"))
(defun cider-initialize-macroexpansion-buffer (expansion ns)
"Create a new Macroexpansion buffer with EXPANSION and namespace NS."
(pop-to-buffer (cider-create-macroexpansion-buffer))
(setq nrepl-buffer-ns ns)
(setq buffer-undo-list nil)
(let ((inhibit-read-only t)
(buffer-undo-list t))
(erase-buffer)
(insert (format "%s" expansion))
(goto-char (point-min))
(font-lock-fontify-buffer)))
(defun cider-redraw-macroexpansion-buffer (expansion buffer start end current-point)
"Redraw the macroexpansion with new EXPANSION.
Text in BUFFER from START to END is replaced with new expansion,
and point is placed at CURRENT-POINT."
(with-current-buffer buffer
(let ((buffer-read-only nil))
(goto-char start)
(delete-region start end)
(insert (format "%s" expansion))
(goto-char start)
(indent-sexp)
(goto-char current-point))))
(defun cider-create-macroexpansion-buffer ()
"Create a new macroexpansion buffer."
(with-current-buffer (cider-popup-buffer cider-macroexpansion-buffer t)
(clojure-mode)
(clojure-disable-cider)
(cider-macroexpansion-minor-mode 1)
(current-buffer)))
(defvar cider-macroexpansion-minor-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "g") 'cider-macroexpand-again)
(define-key map (kbd "q") 'cider-popup-buffer-quit-function)
(define-key map (kbd "d") 'cider-doc)
(define-key map (kbd "j") 'cider-javadoc)
(define-key map (kbd ".") 'cider-jump-to-var)
(cl-labels ((redefine-key (from to)
(dolist (mapping (where-is-internal from cider-mode-map))
(define-key map mapping to))))
(redefine-key 'cider-macroexpand-1 'cider-macroexpand-1-inplace)
(redefine-key 'cider-macroexpand-all 'cider-macroexpand-all-inplace)
(redefine-key 'advertised-undo 'cider-macroexpand-undo)
(redefine-key 'undo 'cider-macroexpand-undo))
map))
(define-minor-mode cider-macroexpansion-minor-mode
"Minor mode for CIDER macroexpansion.
\\{cider-macroexpansion-minor-mode-map}"
nil
" Macroexpand"
cider-macroexpansion-minor-mode-map)
(provide 'cider-macroexpansion)
;;; cider-macroexpansion.el ends here
|
