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;;; cider-apropos.el --- Apropos functionality for Clojure -*- lexical-binding: t -*-
;; Copyright © 2014-2016 Jeff Valk, Bozhidar Batsov
;;
;; Author: Jeff Valk <jv@jeffvalk.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:
;; Apropos functionality for Clojure.
;;; Code:
(require 'cider-doc)
(require 'cider-util)
(require 'cider-compat)
(require 'cider-client)
(require 'cider-popup)
(require 'nrepl-client)
(require 'clojure-mode)
(require 'apropos)
(require 'button)
(defconst cider-apropos-buffer "*cider-apropos*")
(push cider-apropos-buffer cider-ancillary-buffers)
(defun cider-apropos-doc (button)
"Display documentation for the symbol represented at BUTTON."
(cider-doc-lookup (button-get button 'apropos-symbol)))
(defun cider-apropos-summary (query ns docs-p include-private-p case-sensitive-p)
"Return a short description for the performed apropos search."
(concat (if case-sensitive-p "Case-sensitive " "")
(if docs-p "Documentation " "")
(format "Apropos for %S" query)
(if ns (format " in namespace %S" ns) "")
(if include-private-p
" (public and private symbols)"
" (public symbols only)")))
(defun cider-apropos-highlight (doc query)
"Return the DOC string propertized to highlight QUERY matches."
(let ((pos 0))
(while (string-match query doc pos)
(setq pos (match-end 0))
(put-text-property (match-beginning 0)
(match-end 0)
'font-lock-face apropos-match-face doc)))
doc)
(defun cider-apropos-result (result query docs-p)
"Emit a RESULT matching QUERY into current buffer, formatted for DOCS-P."
(nrepl-dbind-response result (name type doc)
(let* ((label (capitalize (if (string= type "variable") "var" type)))
(help (concat "Display doc for this " (downcase label))))
(cider-propertize-region (list 'apropos-symbol name
'action 'cider-apropos-doc
'help-echo help)
(insert-text-button name 'type 'apropos-symbol)
(insert "\n ")
(insert-text-button label 'type (intern (concat "apropos-" type)))
(insert ": ")
(let ((beg (point)))
(if docs-p
(insert (cider-apropos-highlight doc query) "\n")
(insert doc)
(fill-region beg (point))))
(insert "\n")))))
(declare-function cider-mode "cider-mode")
(defun cider-show-apropos (summary results query docs-p)
"Show SUMMARY and RESULTS for QUERY in a pop-up buffer, formatted for DOCS-P."
(with-current-buffer (cider-popup-buffer cider-apropos-buffer t)
(let ((inhibit-read-only t))
(set-syntax-table clojure-mode-syntax-table)
(apropos-mode)
(cider-mode)
(if (boundp 'header-line-format)
(setq-local header-line-format summary)
(insert summary "\n\n"))
(dolist (result results)
(cider-apropos-result result query docs-p))
(goto-char (point-min)))))
;;;###autoload
(defun cider-apropos (query &optional ns docs-p privates-p case-sensitive-p)
"Show all symbols whose names match QUERY, a regular expression.
The search may be limited to the namespace NS, and may optionally search doc
strings, include private vars, and be case sensitive."
(interactive
(cons (read-string "Clojure Apropos (a regular expression): ")
(when current-prefix-arg
(list (let ((ns (read-string "Namespace: ")))
(if (string= ns "") nil ns))
(y-or-n-p "Search doc strings? ")
(y-or-n-p "Include private symbols? ")
(y-or-n-p "Case-sensitive? ")))))
(cider-ensure-op-supported "apropos")
(if-let ((summary (cider-apropos-summary
query ns docs-p privates-p case-sensitive-p))
(results (cider-sync-request:apropos query ns docs-p privates-p case-sensitive-p)))
(cider-show-apropos summary results query docs-p)
(message "No apropos matches for %S" query)))
;;;###autoload
(defun cider-apropos-documentation ()
"Shortcut for (cider-apropos <query> nil t)."
(interactive)
(cider-apropos (read-string "Clojure documentation Apropos (a regular expression): ") nil t))
(provide 'cider-apropos)
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