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;;; cider-find.el --- Functionality for finding things -*- lexical-binding: t -*-
;; Copyright © 2013-2018 Bozhidar Batsov, Artur Malabarba and CIDER contributors
;;
;; Author: Bozhidar Batsov <bozhidar@batsov.com>
;; Artur Malabarba <bruce.connor.am@gmail.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:
;; A bunch of commands for finding resources and definitions.
;;; Code:
(require 'cider-client)
(require 'cider-common)
(require 'thingatpt)
(defun cider--find-var-other-window (var &optional line)
"Find the definition of VAR, optionally at a specific LINE.
Display the results in a different window."
(if-let* ((info (cider-var-info var)))
(progn
(if line (setq info (nrepl-dict-put info "line" line)))
(cider--jump-to-loc-from-info info t))
(user-error "Symbol `%s' not resolved" var)))
(defun cider--find-var (var &optional line)
"Find the definition of VAR, optionally at a specific LINE."
(if-let* ((info (cider-var-info var)))
(progn
(if line (setq info (nrepl-dict-put info "line" line)))
(cider--jump-to-loc-from-info info))
(user-error "Symbol `%s' not resolved" var)))
;;;###autoload
(defun cider-find-var (&optional arg var line)
"Find definition for VAR at LINE.
Prompt according to prefix ARG and `cider-prompt-for-symbol'.
A single or double prefix argument inverts the meaning of
`cider-prompt-for-symbol'. A prefix of `-` or a double prefix argument causes
the results to be displayed in a different window. The default value is
thing at point."
(interactive "P")
(cider-ensure-op-supported "info")
(if var
(cider--find-var var line)
(funcall (cider-prompt-for-symbol-function arg)
"Symbol"
(if (cider--open-other-window-p arg)
#'cider--find-var-other-window
#'cider--find-var))))
(defun cider--find-dwim (symbol-file callback &optional other-window)
"Find the SYMBOL-FILE at point.
CALLBACK upon failure to invoke prompt if not prompted previously.
Show results in a different window if OTHER-WINDOW is true."
(if-let* ((info (cider-var-info symbol-file)))
(cider--jump-to-loc-from-info info other-window)
(progn
(cider-ensure-op-supported "resource")
(if-let* ((resource (cider-sync-request:resource symbol-file))
(buffer (cider-find-file resource)))
(cider-jump-to buffer 0 other-window)
(if (cider--prompt-for-symbol-p current-prefix-arg)
(error "Resource or var %s not resolved" symbol-file)
(let ((current-prefix-arg (if current-prefix-arg nil '(4))))
(call-interactively callback)))))))
(defun cider--find-dwim-interactive (prompt)
"Get interactive arguments for jump-to functions using PROMPT as needed."
(if (cider--prompt-for-symbol-p current-prefix-arg)
(list
(cider-read-from-minibuffer prompt (thing-at-point 'filename)))
(list (or (thing-at-point 'filename) "")))) ; No prompt.
(defun cider-find-dwim-other-window (symbol-file)
"Jump to SYMBOL-FILE at point, place results in other window."
(interactive (cider--find-dwim-interactive "Jump to: "))
(cider--find-dwim symbol-file 'cider-find-dwim-other-window t))
;;;###autoload
(defun cider-find-dwim (symbol-file)
"Find and display the SYMBOL-FILE at point.
SYMBOL-FILE could be a var or a resource. If thing at point is empty then
show dired on project. If var is not found, try to jump to resource of the
same name. When called interactively, a prompt is given according to the
variable `cider-prompt-for-symbol'. A single or double prefix argument
inverts the meaning. A prefix of `-' or a double prefix argument causes
the results to be displayed in a different window. A default value of thing
at point is given when prompted."
(interactive (cider--find-dwim-interactive "Jump to: "))
(cider--find-dwim symbol-file `cider-find-dwim
(cider--open-other-window-p current-prefix-arg)))
;;;###autoload
(defun cider-find-resource (path)
"Find the resource at PATH.
Prompt for input as indicated by the variable `cider-prompt-for-symbol'.
A single or double prefix argument inverts the meaning of
`cider-prompt-for-symbol'. A prefix argument of `-` or a double prefix
argument causes the results to be displayed in other window. The default
value is thing at point."
(interactive
(list
(if (cider--prompt-for-symbol-p current-prefix-arg)
(completing-read "Resource: "
(cider-sync-request:resources-list)
nil nil
(thing-at-point 'filename))
(or (thing-at-point 'filename) ""))))
(cider-ensure-op-supported "resource")
(when (= (length path) 0)
(error "Cannot find resource for empty path"))
(if-let* ((resource (cider-sync-request:resource path))
(buffer (cider-find-file resource)))
(cider-jump-to buffer nil (cider--open-other-window-p current-prefix-arg))
(if (cider--prompt-for-symbol-p current-prefix-arg)
(error "Cannot find resource %s" path)
(let ((current-prefix-arg (cider--invert-prefix-arg current-prefix-arg)))
(call-interactively 'cider-find-resource)))))
(defun cider--invert-prefix-arg (arg)
"Invert the effect of prefix value ARG on `cider-prompt-for-symbol'.
This function preserves the `other-window' meaning of ARG."
(let ((narg (prefix-numeric-value arg)))
(pcase narg
(16 -1) ; empty empty -> -
(-1 16) ; - -> empty empty
(4 nil) ; empty -> no-prefix
(_ 4)))) ; no-prefix -> empty
(defun cider--prefix-invert-prompt-p (arg)
"Test prefix value ARG for its effect on `cider-prompt-for-symbol`."
(let ((narg (prefix-numeric-value arg)))
(pcase narg
(16 t) ; empty empty
(4 t) ; empty
(_ nil))))
(defun cider--prompt-for-symbol-p (&optional prefix)
"Check if cider should prompt for symbol.
Tests againsts PREFIX and the value of `cider-prompt-for-symbol'.
Invert meaning of `cider-prompt-for-symbol' if PREFIX indicates it should be."
(if (cider--prefix-invert-prompt-p prefix)
(not cider-prompt-for-symbol) cider-prompt-for-symbol))
(defun cider--find-ns (ns &optional other-window)
"Find the file containing NS's definition.
Optionally open it in a different window if OTHER-WINDOW is truthy."
(if-let* ((path (cider-sync-request:ns-path ns)))
(cider-jump-to (cider-find-file path) nil other-window)
(user-error "Can't find namespace `%s'" ns)))
;;;###autoload
(defun cider-find-ns (&optional arg ns)
"Find the file containing NS.
A prefix ARG of `-` or a double prefix argument causes
the results to be displayed in a different window."
(interactive "P")
(cider-ensure-connected)
(cider-ensure-op-supported "ns-path")
(if ns
(cider--find-ns ns)
(let* ((namespaces (cider-sync-request:ns-list))
(ns (completing-read "Find namespace: " namespaces)))
(cider--find-ns ns (cider--open-other-window-p arg)))))
;;;###autoload
(defun cider-find-keyword (&optional arg)
"Find the namespace of the keyword at point and its first occurrence there.
For instance - if the keyword at point is \":cider.demo/keyword\", this command
would find the namespace \"cider.demo\" and afterwards find the first mention
of \"::keyword\" there.
Prompt according to prefix ARG and `cider-prompt-for-symbol'.
A single or double prefix argument inverts the meaning of
`cider-prompt-for-symbol'. A prefix of `-` or a double prefix argument causes
the results to be displayed in a different window. The default value is
thing at point."
(interactive "P")
(cider-ensure-connected)
(let* ((kw (let ((kw-at-point (cider-symbol-at-point 'look-back)))
(if (or cider-prompt-for-symbol arg)
(read-string
(format "Keyword (default %s): " kw-at-point)
nil nil kw-at-point)
kw-at-point)))
(ns-qualifier (and
(string-match "^:+\\(.+\\)/.+$" kw)
(match-string 1 kw)))
(kw-ns (if ns-qualifier
(cider-resolve-alias (cider-current-ns) ns-qualifier)
(cider-current-ns)))
(kw-to-find (concat "::" (replace-regexp-in-string "^:+\\(.+/\\)?" "" kw))))
(when (and ns-qualifier (string= kw-ns (cider-current-ns)))
(error "Could not resolve alias `%s' in `%s'" ns-qualifier (cider-current-ns)))
(cider--find-ns kw-ns arg)
(search-forward-regexp kw-to-find nil 'noerror)))
(provide 'cider-find)
;;; cider-find.el ends here
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