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cider-repl.el
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cider-repl.el
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;;; cider-repl.el --- REPL interactions -*- lexical-binding: t -*-
;; Copyright © 2012-2013 Tim King, Phil Hagelberg, Bozhidar Batsov
;; Copyright © 2013-2017 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:
;; REPL interactions.
;;; Code:
(require 'cider-client)
(require 'cider-doc)
(require 'cider-test)
(require 'cider-eldoc) ; for cider-eldoc-setup
(require 'cider-common)
(require 'subr-x)
(require 'cider-compat)
(require 'cider-util)
(require 'cider-resolve)
(require 'clojure-mode)
(require 'easymenu)
(require 'cl-lib)
(eval-when-compile
(defvar paredit-version)
(defvar paredit-space-for-delimiter-predicates))
(defgroup cider-repl nil
"Interaction with the REPL."
:prefix "cider-repl-"
:group 'cider)
(defface cider-repl-prompt-face
'((t (:inherit font-lock-keyword-face)))
"Face for the prompt in the REPL buffer."
:group 'cider-repl)
(defface cider-repl-stdout-face
'((t (:inherit font-lock-string-face)))
"Face for STDOUT output in the REPL buffer."
:group 'cider-repl)
(defface cider-repl-stderr-face
'((t (:inherit font-lock-warning-face)))
"Face for STDERR output in the REPL buffer."
:group 'cider-repl
:package-version '(cider . "0.6.0"))
(defface cider-repl-input-face
'((t (:bold t)))
"Face for previous input in the REPL buffer."
:group 'cider-repl)
(defface cider-repl-result-face
'((t ()))
"Face for the result of an evaluation in the REPL buffer."
:group 'cider-repl)
(defcustom cider-repl-pop-to-buffer-on-connect t
"Controls whether to pop to the REPL buffer on connect.
When set to nil the buffer will only be created, and not displayed. When
set to `display-only' the buffer will be displayed, but it will not become
focused. Otherwise the buffer is displayed and focused."
:type '(choice (const :tag "Create the buffer, but don't display it" nil)
(const :tag "Create and display the buffer, but don't focus it"
display-only)
(const :tag "Create, display, and focus the buffer" t))
:group 'cider-repl)
(defcustom cider-repl-display-in-current-window nil
"Controls whether the REPL buffer is displayed in the current window."
:type 'boolean
:group 'cider-repl)
(defcustom cider-repl-scroll-on-output t
"Controls whether the REPL buffer auto-scrolls on new output.
When set to t (the default), if the REPL buffer contains more lines than the
size of the window, the buffer is automatically re-centered upon completion
of evaluating an expression, so that the bottom line of output is on the
bottom line of the window.
If this is set to nil, no re-centering takes place."
:type 'boolean
:group 'cider-repl
:package-version '(cider . "0.11.0"))
(defcustom cider-repl-use-pretty-printing nil
"Control whether the results in REPL are pretty-printed or not.
The `cider-toggle-pretty-printing' command can be used to interactively
change the setting's value."
:type 'boolean
:group 'cider-repl)
(defcustom cider-repl-pretty-print-width nil
"Control the width of pretty printing on the REPL.
This sets the wrap point for pretty printing on the repl. If nil, it
defaults to the variable `fill-column'."
:type '(restricted-sexp :match-alternatives
(integerp 'nil))
:group 'cider-repl
:package-version '(cider . "0.15.0"))
(defcustom cider-repl-use-clojure-font-lock t
"Non-nil means to use Clojure mode font-locking for input and result.
Nil means that `cider-repl-input-face' and `cider-repl-result-face'
will be used."
:type 'boolean
:group 'cider-repl
:package-version '(cider . "0.10.0"))
(defcustom cider-repl-result-prefix ""
"The prefix displayed in the REPL before a result value."
:type 'string
:group 'cider
:package-version '(cider . "0.5.0"))
(defcustom cider-repl-tab-command 'cider-repl-indent-and-complete-symbol
"Select the command to be invoked by the TAB key.
The default option is `cider-repl-indent-and-complete-symbol'. If
you'd like to use the default Emacs behavior use
`indent-for-tab-command'."
:type 'symbol
:group 'cider-repl)
(defcustom cider-repl-display-help-banner t
"When non-nil a bit of help text will be displayed on REPL start."
:type 'boolean
:group 'cider-repl
:package-version '(cider . "0.11.0"))
;;;; REPL buffer local variables
(defvar-local cider-repl-input-start-mark nil)
(defvar-local cider-repl-prompt-start-mark nil)
(defvar-local cider-repl-old-input-counter 0
"Counter used to generate unique `cider-old-input' properties.
This property value must be unique to avoid having adjacent inputs be
joined together.")
(defvar-local cider-repl-input-history '()
"History list of strings read from the REPL buffer.")
(defvar-local cider-repl-input-history-items-added 0
"Variable counting the items added in the current session.")
(defvar-local cider-repl-output-start nil
"Marker for the start of output.
Currently its only purpose is to facilitate `cider-repl-clear-buffer'.")
(defvar-local cider-repl-output-end nil
"Marker for the end of output.
Currently its only purpose is to facilitate `cider-repl-clear-buffer'.")
(defun cider-repl-tab ()
"Invoked on TAB keystrokes in `cider-repl-mode' buffers."
(interactive)
(funcall cider-repl-tab-command))
(defun cider-repl-reset-markers ()
"Reset all REPL markers."
(dolist (markname '(cider-repl-output-start
cider-repl-output-end
cider-repl-prompt-start-mark
cider-repl-input-start-mark))
(set markname (make-marker))
(set-marker (symbol-value markname) (point))))
;;; REPL init
(defvar-local cider-repl-ns-cache nil
"A dict holding information about all currently loaded namespaces.
This cache is stored in the connection buffer. Other buffer's access it
via `cider-current-connection'.")
(defvar cider-mode)
(declare-function cider-refresh-dynamic-font-lock "cider-mode")
(defun cider-repl--state-handler (response)
"Handle the server state contained in RESPONSE.
Currently, this is only used to keep `cider-repl-type' updated."
(with-demoted-errors "Error in `cider-repl--state-handler': %s"
(when (member "state" (nrepl-dict-get response "status"))
(nrepl-dbind-response response (repl-type changed-namespaces)
(when repl-type
(setq cider-repl-type repl-type))
(unless (nrepl-dict-empty-p changed-namespaces)
(setq cider-repl-ns-cache (nrepl-dict-merge cider-repl-ns-cache changed-namespaces))
(dolist (b (buffer-list))
(with-current-buffer b
;; Metadata changed, so signatures may have changed too.
(setq cider-eldoc-last-symbol nil)
(when (or cider-mode (derived-mode-p 'cider-repl-mode))
(when-let ((ns-dict (or (nrepl-dict-get changed-namespaces (cider-current-ns))
(let ((ns-dict (cider-resolve--get-in (cider-current-ns))))
(when (seq-find (lambda (ns) (nrepl-dict-get changed-namespaces ns))
(nrepl-dict-get ns-dict "aliases"))
ns-dict)))))
(cider-refresh-dynamic-font-lock ns-dict))))))))))
(declare-function cider-default-err-handler "cider-interaction")
(defun cider-repl-create (endpoint)
"Create a REPL buffer and install `cider-repl-mode'.
ENDPOINT is a plist as returned by `nrepl-connect'."
;; Connection might not have been set as yet. Please don't send requests here.
(let* ((reuse-buff (not (eq 'new nrepl-use-this-as-repl-buffer)))
(buff-name (nrepl-make-buffer-name nrepl-repl-buffer-name-template nil
(plist-get endpoint :host)
(plist-get endpoint :port)
reuse-buff)))
;; when reusing, rename the buffer accordingly
(when (and reuse-buff
(not (equal buff-name nrepl-use-this-as-repl-buffer)))
;; uniquify as it might be Nth connection to the same endpoint
(setq buff-name (generate-new-buffer-name buff-name))
(with-current-buffer nrepl-use-this-as-repl-buffer
(rename-buffer buff-name)))
(with-current-buffer (get-buffer-create buff-name)
(unless (derived-mode-p 'cider-repl-mode)
(cider-repl-mode))
(setq nrepl-err-handler #'cider-default-err-handler)
(cider-repl-reset-markers)
(add-hook 'nrepl-response-handler-functions #'cider-repl--state-handler nil 'local)
(add-hook 'nrepl-connected-hook 'cider--connected-handler nil 'local)
(add-hook 'nrepl-disconnected-hook 'cider--disconnected-handler nil 'local)
(current-buffer))))
(defun cider-repl-require-repl-utils ()
"Require standard REPL util functions into the current REPL."
(interactive)
(cider-nrepl-request:eval
"(when (clojure.core/resolve 'clojure.main/repl-requires)
(clojure.core/map clojure.core/require clojure.main/repl-requires))"
(lambda (_response) nil)))
(declare-function cider-set-buffer-ns "cider-mode")
(defun cider-repl-set-initial-ns (buffer)
"Set the REPL BUFFER's initial namespace (by altering `cider-buffer-ns').
This is \"user\" by default but can be overridden in apps like lein (:init-ns)."
;; we don't want to get a timeout during init
(let ((nrepl-sync-request-timeout nil))
(with-current-buffer buffer
(let ((initial-ns (or (read
(nrepl-dict-get
(cider-nrepl-sync-request:eval "(str *ns*)")
"value"))
"user")))
(cider-set-buffer-ns initial-ns)))))
(defvar cider-current-clojure-buffer nil
"This variable holds current buffer temporarily when connecting to a REPL.
It is set to current buffer when `cider' or `cider-jack-in' is called.
After the REPL buffer is created, the value of this variable is used
to call `cider-remember-clojure-buffer'.")
(declare-function cider-remember-clojure-buffer "cider-mode")
(defun cider-repl-init (buffer &optional no-banner)
"Initialize the REPL in BUFFER.
BUFFER must be a REPL buffer with `cider-repl-mode' and a running
client process connection. Unless NO-BANNER is non-nil, insert a banner."
(cider-repl-set-initial-ns buffer)
(cider-repl-require-repl-utils)
(unless no-banner
(cider-repl--insert-banner-and-prompt buffer))
(when cider-repl-display-in-current-window
(add-to-list 'same-window-buffer-names (buffer-name buffer)))
(pcase cider-repl-pop-to-buffer-on-connect
(`display-only (display-buffer buffer))
((pred identity) (pop-to-buffer buffer)))
(cider-remember-clojure-buffer cider-current-clojure-buffer)
buffer)
(defun cider-repl--banner ()
"Generate the welcome REPL buffer banner."
(let ((host (cider--connection-host (current-buffer)))
(port (cider--connection-port (current-buffer))))
(format ";; Connected to nREPL server - nrepl://%s:%s
;; CIDER %s, nREPL %s
;; Clojure %s, Java %s
;; Docs: (doc function-name)
;; (find-doc part-of-name)
;; Source: (source function-name)
;; Javadoc: (javadoc java-object-or-class)
;; Exit: <C-c C-q>
;; Results: Stored in vars *1, *2, *3, an exception in *e;"
host
port
(cider--version)
(cider--nrepl-version)
(cider--clojure-version)
(cider--java-version))))
(defun cider-repl--help-banner ()
"Generate the help banner."
(substitute-command-keys
"\n;; ======================================================================
;; If you're new to CIDER it is highly recommended to go through its
;; manual first. Type <M-x cider-view-manual> to view it.
;; In case you're seeing any warnings you should consult the manual's
;; \"Troubleshooting\" section.
;;
;; Here are few tips to get you started:
;;
;; * Press <\\[describe-mode]> to see a list of the keybindings available (this
;; will work in every Emacs buffer)
;; * Press <\\[cider-repl-handle-shortcut]> to quickly invoke some REPL command
;; * Press <\\[cider-switch-to-last-clojure-buffer]> to switch between the REPL and a Clojure file
;; * Press <\\[cider-find-var]> to jump to the source of something (e.g. a var, a
;; Java method)
;; * Press <\\[cider-doc]> to view the documentation for something (e.g.
;; a var, a Java method)
;; * Enable `eldoc-mode' to display function & method signatures in the minibuffer.
;; * Print CIDER's refcard and keep it close to your keyboard.
;;
;; CIDER is super customizable - try <M-x customize-group cider> to
;; get a feel for this. If you're thirsty for knowledge you should try
;; <M-x cider-drink-a-sip>.
;;
;; If you think you've encountered a bug (or have some suggestions for
;; improvements) use <M-x cider-report-bug> to report it.
;;
;; Above all else - don't panic! In case of an emergency - procure
;; some (hard) cider and enjoy it responsibly!
;;
;; You can remove this message with the `cider-repl-clear-help-banner' command.
;; You can disable it from appearing on start by setting
;; `cider-repl-display-help-banner' to nil.
;; ======================================================================
"))
(defun cider-repl--insert-banner-and-prompt (buffer)
"Insert REPL banner and REPL prompt in BUFFER."
(with-current-buffer buffer
(when (zerop (buffer-size))
(insert (propertize (cider-repl--banner) 'font-lock-face 'font-lock-comment-face))
(when cider-repl-display-help-banner
(insert (propertize (cider-repl--help-banner) 'font-lock-face 'font-lock-comment-face))))
(goto-char (point-max))
(cider-repl--mark-output-start)
(cider-repl--mark-input-start)
(cider-repl--insert-prompt cider-buffer-ns)))
;;; REPL interaction
(defun cider-repl--in-input-area-p ()
"Return t if in input area."
(<= cider-repl-input-start-mark (point)))
(defun cider-repl--current-input (&optional until-point-p)
"Return the current input as string.
The input is the region from after the last prompt to the end of
buffer. If UNTIL-POINT-P is non-nil, the input is until the current
point."
(buffer-substring-no-properties cider-repl-input-start-mark
(if until-point-p
(point)
(point-max))))
(defun cider-repl-previous-prompt ()
"Move backward to the previous prompt."
(interactive)
(cider-repl--find-prompt t))
(defun cider-repl-next-prompt ()
"Move forward to the next prompt."
(interactive)
(cider-repl--find-prompt))
(defun cider-repl--find-prompt (&optional backward)
"Find the next prompt.
If BACKWARD is non-nil look backward."
(let ((origin (point))
(cider-repl-prompt-property 'field))
(while (progn
(cider-search-property-change cider-repl-prompt-property backward)
(not (or (cider-end-of-proprange-p cider-repl-prompt-property) (bobp) (eobp)))))
(unless (cider-end-of-proprange-p cider-repl-prompt-property)
(goto-char origin))))
(defun cider-search-property-change (prop &optional backward)
"Search forward for a property change to PROP.
If BACKWARD is non-nil search backward."
(cond (backward
(goto-char (previous-single-char-property-change (point) prop)))
(t
(goto-char (next-single-char-property-change (point) prop)))))
(defun cider-end-of-proprange-p (property)
"Return t if at the the end of a property range for PROPERTY."
(and (get-char-property (max (point-min) (1- (point))) property)
(not (get-char-property (point) property))))
(defun cider-repl--mark-input-start ()
"Mark the input start."
(set-marker cider-repl-input-start-mark (point) (current-buffer)))
(defun cider-repl--mark-output-start ()
"Mark the output start."
(set-marker cider-repl-output-start (point))
(set-marker cider-repl-output-end (point)))
(defun cider-repl-mode-beginning-of-defun (&optional arg)
"Move to the beginning of defun.
If given a negative value of ARG, move to the end of defun."
(if (and arg (< arg 0))
(cider-repl-mode-end-of-defun (- arg))
(dotimes (_ (or arg 1))
(cider-repl-previous-prompt))))
(defun cider-repl-mode-end-of-defun (&optional arg)
"Move to the end of defun.
If given a negative value of ARG, move to the beginning of defun."
(if (and arg (< arg 0))
(cider-repl-mode-beginning-of-defun (- arg))
(dotimes (_ (or arg 1))
(cider-repl-next-prompt))))
(defun cider-repl-beginning-of-defun ()
"Move to beginning of defun."
(interactive)
;; We call `beginning-of-defun' if we're at the start of a prompt
;; already, to trigger `cider-repl-mode-beginning-of-defun' by means
;; of the locally bound `beginning-of-defun-function', in order to
;; jump to the start of the previous prompt.
(if (and (not (cider-repl--at-prompt-start-p))
(cider-repl--in-input-area-p))
(goto-char cider-repl-input-start-mark)
(beginning-of-defun)))
(defun cider-repl-end-of-defun ()
"Move to end of defun."
(interactive)
;; C.f. `cider-repl-beginning-of-defun'
(if (and (not (= (point) (point-max)))
(cider-repl--in-input-area-p))
(goto-char (point-max))
(end-of-defun)))
(defun cider-repl-bol-mark ()
"Set the mark and go to the beginning of line or the prompt."
(interactive)
(unless mark-active
(set-mark (point)))
(move-beginning-of-line 1))
(defun cider-repl--at-prompt-start-p ()
"Return t if point is at the start of prompt.
This will not work on non-current prompts."
(= (point) cider-repl-input-start-mark))
(defun cider-repl--show-maximum-output ()
"Put the end of the buffer at the bottom of the window."
(when (and cider-repl-scroll-on-output (eobp))
(let ((win (get-buffer-window (current-buffer) t)))
(when win
(with-selected-window win
(set-window-point win (point-max))
(recenter -1))))))
(defmacro cider-save-marker (marker &rest body)
"Save MARKER and execute BODY."
(declare (debug t))
(let ((pos (make-symbol "pos")))
`(let ((,pos (marker-position ,marker)))
(prog1 (progn . ,body)
(set-marker ,marker ,pos)))))
(put 'cider-save-marker 'lisp-indent-function 1)
(defun cider-repl-prompt-default (namespace)
"Return a prompt string that mentions NAMESPACE."
(format "%s> " namespace))
(defun cider-repl-prompt-abbreviated (namespace)
"Return a prompt string that abbreviates NAMESPACE."
(format "%s> " (cider-abbreviate-ns namespace)))
(defun cider-repl-prompt-lastname (namespace)
"Return a prompt string with the last name in NAMESPACE."
(format "%s> " (cider-last-ns-segment namespace)))
(defcustom cider-repl-prompt-function #'cider-repl-prompt-default
"A function that returns a prompt string.
Takes one argument, a namespace name.
For convenience, three functions are already provided for this purpose:
`cider-repl-prompt-lastname', `cider-repl-prompt-abbreviated', and
`cider-repl-prompt-default'"
:type '(choice (const :tag "Full namespace" cider-repl-prompt-default)
(const :tag "Abbreviated namespace" cider-repl-prompt-abbreviated)
(const :tag "Last name in namespace" cider-repl-prompt-lastname)
(function :tag "Custom function"))
:group 'cider-repl
:package-version '(cider . "0.9.0"))
(defun cider-repl--insert-prompt (namespace)
"Insert the prompt (before markers!), taking into account NAMESPACE.
Set point after the prompt.
Return the position of the prompt beginning."
(goto-char cider-repl-input-start-mark)
(cider-save-marker cider-repl-output-start
(cider-save-marker cider-repl-output-end
(unless (bolp) (insert-before-markers "\n"))
(let ((prompt-start (point))
(prompt (funcall cider-repl-prompt-function namespace)))
(cider-propertize-region
'(font-lock-face cider-repl-prompt-face read-only t intangible t
field cider-repl-prompt
rear-nonsticky (field read-only font-lock-face intangible))
(insert-before-markers prompt))
(set-marker cider-repl-prompt-start-mark prompt-start)
prompt-start))))
(defun cider-repl--flush-ansi-color-context ()
"Flush ansi color context after printing.
When there is a possible unfinished ansi control sequence,
`ansi-color-context` maintains this list."
(when (and ansi-color-context (stringp (cadr ansi-color-context)))
(insert-before-markers (cadr ansi-color-context))
(setq ansi-color-context nil)))
(defun cider-repl--emit-output-at-pos (buffer string output-face position &optional bol)
"Using BUFFER, insert STRING (applying to it OUTPUT-FACE) at POSITION.
If BOL is non-nil insert at the beginning of line."
(with-current-buffer buffer
(save-excursion
(cider-save-marker cider-repl-output-start
(cider-save-marker cider-repl-output-end
(goto-char position)
;; TODO: Review the need for bol
(when (and bol (not (bolp))) (insert-before-markers "\n"))
(insert-before-markers
(ansi-color-apply (propertize string
'font-lock-face output-face
'rear-nonsticky '(font-lock-face))))
(cider-repl--flush-ansi-color-context)
(when (and (= (point) cider-repl-prompt-start-mark)
(not (bolp)))
(insert-before-markers "\n")
(set-marker cider-repl-output-end (1- (point)))))))
(cider-repl--show-maximum-output)))
(defun cider-repl--emit-interactive-output (string face)
"Emit STRING as interactive output using FACE."
(with-current-buffer (cider-current-repl-buffer)
(let ((pos (cider-repl--end-of-line-before-input-start))
(string (replace-regexp-in-string "\n\\'" "" string)))
(cider-repl--emit-output-at-pos (current-buffer) string face pos t))))
(defun cider-repl-emit-interactive-stdout (string)
"Emit STRING as interactive output."
(cider-repl--emit-interactive-output string 'cider-repl-stdout-face))
(defun cider-repl-emit-interactive-stderr (string)
"Emit STRING as interactive err output."
(cider-repl--emit-interactive-output string 'cider-repl-stderr-face))
(defun cider-repl-manual-warning (section-id format &rest args)
"Emit a warning to the REPL and link to the online manual.
SECTION-ID is the section to link to. The link is added on the last line.
FORMAT is a format string to compile with ARGS and display on the REPL."
(let ((message (apply #'format format args)))
(cider-repl-emit-interactive-stderr
(concat "WARNING: " message "\n "
(cider--manual-button "More information" section-id)
"."))))
(defun cider-repl--emit-output (buffer string face &optional bol)
"Using BUFFER, emit STRING font-locked with FACE.
If BOL is non-nil, emit at the beginning of the line."
(with-current-buffer buffer
(cider-repl--emit-output-at-pos buffer string face cider-repl-input-start-mark bol)))
(defun cider-repl-emit-stdout (buffer string)
"Using BUFFER, emit STRING as standard output."
(cider-repl--emit-output buffer string 'cider-repl-stdout-face))
(defun cider-repl-emit-stderr (buffer string)
"Using BUFFER, emit STRING as error output."
(cider-repl--emit-output buffer string 'cider-repl-stderr-face))
(defun cider-repl-emit-prompt (buffer)
"Emit the REPL prompt into BUFFER."
(with-current-buffer buffer
(save-excursion
(cider-save-marker cider-repl-output-start
(cider-save-marker cider-repl-output-end
(cider-repl--insert-prompt cider-buffer-ns))))
(cider-repl--show-maximum-output)))
(defun cider-repl-emit-result (buffer string &optional bol)
"Emit into BUFFER the result STRING and mark it as an evaluation result.
If BOL is non-nil insert at the beginning of the line."
(with-current-buffer buffer
(save-excursion
(cider-save-marker cider-repl-output-start
(cider-save-marker cider-repl-output-end
(goto-char cider-repl-input-start-mark)
(when (and bol (not (bolp)))
(insert-before-markers "\n"))
(insert-before-markers (propertize cider-repl-result-prefix 'font-lock-face 'font-lock-comment-face))
(if cider-repl-use-clojure-font-lock
(insert-before-markers (cider-font-lock-as-clojure string))
(cider-propertize-region
'(font-lock-face cider-repl-result-face rear-nonsticky (font-lock-face))
(insert-before-markers string))))))
(cider-repl--show-maximum-output)))
(defun cider-repl-newline-and-indent ()
"Insert a newline, then indent the next line.
Restrict the buffer from the prompt for indentation, to avoid being
confused by strange characters (like unmatched quotes) appearing
earlier in the buffer."
(interactive)
(save-restriction
(narrow-to-region cider-repl-prompt-start-mark (point-max))
(insert "\n")
(lisp-indent-line)))
(defun cider-repl-indent-and-complete-symbol ()
"Indent the current line and perform symbol completion.
First indent the line. If indenting doesn't move point, complete
the symbol."
(interactive)
(let ((pos (point)))
(lisp-indent-line)
(when (= pos (point))
(if (save-excursion (re-search-backward "[^() \n\t\r]+\\=" nil t))
(completion-at-point)))))
(defun cider-repl-kill-input ()
"Kill all text from the prompt to point."
(interactive)
(cond ((< (marker-position cider-repl-input-start-mark) (point))
(kill-region cider-repl-input-start-mark (point)))
((= (point) (marker-position cider-repl-input-start-mark))
(cider-repl-delete-current-input))))
(defun cider-repl--input-complete-p (start end)
"Return t if the region from START to END is a complete sexp."
(save-excursion
(goto-char start)
(cond ((looking-at-p "\\s *[@'`#]?[(\"]")
(ignore-errors
(save-restriction
(narrow-to-region start end)
;; Keep stepping over blanks and sexps until the end of
;; buffer is reached or an error occurs. Tolerate extra
;; close parens.
(cl-loop do (skip-chars-forward " \t\r\n)")
until (eobp)
do (forward-sexp))
t)))
(t t))))
(defun cider-repl-handler (buffer)
"Make an nREPL evaluation handler for the REPL BUFFER."
(nrepl-make-response-handler buffer
(lambda (buffer value)
(cider-repl-emit-result buffer value t))
(lambda (buffer out)
(cider-repl-emit-stdout buffer out))
(lambda (buffer err)
(cider-repl-emit-stderr buffer err))
(lambda (buffer)
(cider-repl-emit-prompt buffer))
nrepl-err-handler
(lambda (buffer pprint-out)
(cider-repl-emit-result buffer pprint-out nil))))
(defun cider-repl--send-input (&optional newline)
"Go to the end of the input and send the current input.
If NEWLINE is true then add a newline at the end of the input."
(unless (cider-repl--in-input-area-p)
(error "No input at point"))
(goto-char (point-max))
(let ((end (point))) ; end of input, without the newline
(cider-repl--add-to-input-history (buffer-substring cider-repl-input-start-mark end))
(when newline
(insert "\n")
(cider-repl--show-maximum-output))
(let ((inhibit-modification-hooks t))
(add-text-properties cider-repl-input-start-mark
(point)
`(cider-old-input
,(cl-incf cider-repl-old-input-counter))))
(unless cider-repl-use-clojure-font-lock
(let ((overlay (make-overlay cider-repl-input-start-mark end)))
;; These properties are on an overlay so that they won't be taken
;; by kill/yank.
(overlay-put overlay 'read-only t)
(overlay-put overlay 'font-lock-face 'cider-repl-input-face))))
(let ((input (cider-repl--current-input))
(input-start (save-excursion (cider-repl-beginning-of-defun) (point))))
(goto-char (point-max))
(cider-repl--mark-input-start)
(cider-repl--mark-output-start)
(cider-nrepl-request:eval
input
(cider-repl-handler (current-buffer))
(cider-current-ns)
(line-number-at-pos input-start)
(cider-column-number-at-pos input-start)
(unless (or (not cider-repl-use-pretty-printing)
(string-match-p "\\`[ \t\r\n]*\\'" input))
(cider--nrepl-pprint-request-plist (cider--pretty-print-width))))))
(defun cider-repl-return (&optional end-of-input)
"Evaluate the current input string, or insert a newline.
Send the current input ony if a whole expression has been entered,
i.e. the parenthesis are matched.
When END-OF-INPUT is non-nil, send the input even if the parentheses
are not balanced."
(interactive "P")
(cond
(end-of-input
(cider-repl--send-input))
((and (get-text-property (point) 'cider-old-input)
(< (point) cider-repl-input-start-mark))
(cider-repl--grab-old-input end-of-input)
(cider-repl--recenter-if-needed))
((cider-repl--input-complete-p cider-repl-input-start-mark (point-max))
(cider-repl--send-input t))
(t
(cider-repl-newline-and-indent)
(message "[input not complete]"))))
(defun cider-repl--recenter-if-needed ()
"Make sure that the point is visible."
(unless (pos-visible-in-window-p (point-max))
(save-excursion
(goto-char (point-max))
(recenter -1))))
(defun cider-repl--grab-old-input (replace)
"Resend the old REPL input at point.
If REPLACE is non-nil the current input is replaced with the old
input; otherwise the new input is appended. The old input has the
text property `cider-old-input'."
(cl-multiple-value-bind (beg end) (cider-property-bounds 'cider-old-input)
(let ((old-input (buffer-substring beg end)) ;;preserve
;;properties, they will be removed later
(offset (- (point) beg)))
;; Append the old input or replace the current input
(cond (replace (goto-char cider-repl-input-start-mark))
(t (goto-char (point-max))
(unless (eq (char-before) ?\ )
(insert " "))))
(delete-region (point) (point-max))
(save-excursion
(insert old-input)
(when (equal (char-before) ?\n)
(delete-char -1)))
(forward-char offset))))
(defun cider-repl-closing-return ()
"Evaluate the current input string after closing all open parenthesized or bracketed expressions."
(interactive)
(goto-char (point-max))
(save-restriction
(narrow-to-region cider-repl-input-start-mark (point))
(let ((matching-delimiter nil))
(while (ignore-errors (save-excursion
(backward-up-list 1)
(setq matching-delimiter (cdr (syntax-after (point))))) t)
(insert-char matching-delimiter))))
(cider-repl-return))
(defun cider-repl-toggle-pretty-printing ()
"Toggle pretty-printing in the REPL."
(interactive)
(setq cider-repl-use-pretty-printing (not cider-repl-use-pretty-printing))
(message "Pretty printing in REPL %s."
(if cider-repl-use-pretty-printing "enabled" "disabled")))
(defun cider--pretty-print-width ()
"Return the width to use for pretty-printing."
(or cider-repl-pretty-print-width
fill-column
80))
(defun cider-repl-switch-to-other ()
"Switch between the Clojure and ClojureScript REPLs for the current project."
(interactive)
(if-let (other-connection (cider-other-connection))
(switch-to-buffer other-connection)
(message "There's no other REPL for the current project")))
(defvar cider-repl-clear-buffer-hook)
(defun cider-repl--clear-region (start end)
"Delete the output and its overlays between START and END."
(mapc #'delete-overlay (overlays-in start end))
(delete-region start end))
(defun cider-repl-clear-buffer ()
"Delete the output generated by the Clojure process."
(interactive)
(let ((inhibit-read-only t))
(cider-repl--clear-region (point-min) cider-repl-prompt-start-mark)
(cider-repl--clear-region cider-repl-output-start cider-repl-output-end)
(when (< (point) cider-repl-input-start-mark)
(goto-char cider-repl-input-start-mark))
(recenter t))
(run-hooks 'cider-repl-clear-buffer-hook))
(defun cider-repl--end-of-line-before-input-start ()
"Return the position of the end of the line preceding the beginning of input."
(1- (previous-single-property-change cider-repl-input-start-mark 'field nil
(1+ (point-min)))))
(defun cider-repl-clear-output (&optional clear-repl)
"Delete the output inserted since the last input.
With a prefix argument CLEAR-REPL it will clear the entire REPL buffer instead."
(interactive "P")
(if clear-repl
(cider-repl-clear-buffer)
(let ((start (save-excursion
(cider-repl-previous-prompt)
(ignore-errors (forward-sexp))
(forward-line)
(point)))
(end (cider-repl--end-of-line-before-input-start)))
(when (< start end)
(let ((inhibit-read-only t))
(cider-repl--clear-region start end)
(save-excursion
(goto-char start)
(insert
(propertize ";; output cleared" 'font-lock-face 'font-lock-comment-face))))))))
(defun cider-repl-clear-banners ()
"Delete the REPL banners."
(interactive)
;; TODO: Improve the boundaries detecting logic
;; probably it should be based on text properties
;; the current implemetation will clear warnings as well
(let ((start (point-min))
(end (save-excursion
(goto-char (point-min))
(cider-repl-next-prompt)
(forward-line -1)
(end-of-line)
(point))))
(when (< start end)
(let ((inhibit-read-only t))
(cider-repl--clear-region start (1+ end))))))
(defun cider-repl-clear-help-banner ()
"Delete the help REPL banner."
(interactive)
;; TODO: Improve the boundaries detecting logic
;; probably it should be based on text properties
(let ((start (save-excursion
(goto-char (point-min))
(search-forward ";; =")
(beginning-of-line)
(point)))
(end (save-excursion
(goto-char (point-min))
(cider-repl-next-prompt)
(search-backward ";; =")
(end-of-line)
(point))))
(when (< start end)
(let ((inhibit-read-only t))
(cider-repl--clear-region start (1+ end))))))
(defun cider-repl-switch-ns-handler (buffer)
"Make an nREPL evaluation handler for the REPL BUFFER's ns switching."
(nrepl-make-response-handler buffer
(lambda (_buffer _value))
(lambda (buffer out)
(cider-repl-emit-stdout buffer out))
(lambda (buffer err)
(cider-repl-emit-stderr buffer err))
(lambda (buffer)
(cider-repl-emit-prompt buffer))))
(defun cider-repl-set-ns (ns)
"Switch the namespace of the REPL buffer to NS.
If called from a cljc or cljx buffer act on both the Clojure and
ClojureScript REPL if there are more than one REPL present.
If invoked in a REPL buffer the command will prompt for the name of the
namespace to switch to."
(interactive (list (if (or (derived-mode-p 'cider-repl-mode)
(null (cider-ns-form)))
(completing-read "Switch to namespace: "
(cider-sync-request:ns-list))
(cider-current-ns))))
(when (or (not ns) (equal ns ""))
(user-error "No namespace selected"))
(cider-map-connections
(lambda (connection)
(cider-nrepl-request:eval (format "(in-ns '%s)" ns)
(cider-repl-switch-ns-handler connection)))
:both))
;;;;; History
(defcustom cider-repl-wrap-history nil
"T to wrap history around when the end is reached."
:type 'boolean
:group 'cider-repl)
;; These two vars contain the state of the last history search. We
;; only use them if `last-command' was `cider-repl--history-replace',
;; otherwise we reinitialize them.
(defvar cider-repl-input-history-position -1
"Newer items have smaller indices.")
(defvar cider-repl-history-pattern nil
"The regexp most recently used for finding input history.")
(defun cider-repl--add-to-input-history (string)
"Add STRING to the input history.
Empty strings and duplicates are ignored."
(unless (or (equal string "")
(equal string (car cider-repl-input-history)))
(push string cider-repl-input-history)
(cl-incf cider-repl-input-history-items-added)))
(defun cider-repl-delete-current-input ()
"Delete all text after the prompt."
(goto-char (point-max))
(delete-region cider-repl-input-start-mark (point-max)))
(defun cider-repl--replace-input (string)
"Replace the current REPL input with STRING."
(cider-repl-delete-current-input)
(insert-and-inherit string))
(defun cider-repl--position-in-history (start-pos direction regexp)
"Return the position of the history item starting at START-POS.
Search in DIRECTION for REGEXP.
Return -1 resp the length of the history if no item matches."
;; Loop through the history list looking for a matching line
(let* ((step (cl-ecase direction
(forward -1)
(backward 1)))
(history cider-repl-input-history)
(len (length history)))
(cl-loop for pos = (+ start-pos step) then (+ pos step)
if (< pos 0) return -1
if (<= len pos) return len
if (string-match-p regexp (nth pos history)) return pos)))
(defun cider-repl--history-replace (direction &optional regexp)
"Replace the current input with the next line in DIRECTION.
DIRECTION is 'forward' or 'backward' (in the history list).
If REGEXP is non-nil, only lines matching REGEXP are considered."
(setq cider-repl-history-pattern regexp)
(let* ((min-pos -1)
(max-pos (length cider-repl-input-history))
(pos0 (cond ((cider-history-search-in-progress-p)
cider-repl-input-history-position)
(t min-pos)))
(pos (cider-repl--position-in-history pos0 direction (or regexp "")))
(msg nil))
(cond ((and (< min-pos pos) (< pos max-pos))
(cider-repl--replace-input (nth pos cider-repl-input-history))
(setq msg (format "History item: %d" pos)))
((not cider-repl-wrap-history)
(setq msg (cond ((= pos min-pos) "End of history")
((= pos max-pos) "Beginning of history"))))