17ee0e400b
After moving off of Meta, Dotfiles has a greater responsibility to manage configs. Vim, Tmux, and Emacs are now within Stow's purview.
311 lines
13 KiB
EmacsLisp
311 lines
13 KiB
EmacsLisp
;;; cider-overlays.el --- Managing CIDER overlays -*- lexical-binding: t; -*-
|
||
|
||
;; Copyright © 2015-2018 Bozhidar Batsov, Artur Malabarba and CIDER contributors
|
||
|
||
;; Author: 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/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;; Use `cider--make-overlay' to place a generic overlay at point. Or use
|
||
;; `cider--make-result-overlay' to place an interactive eval result overlay at
|
||
;; the end of a specified line.
|
||
|
||
;;; Code:
|
||
|
||
(require 'cider-common)
|
||
(require 'subr-x)
|
||
(require 'cider-compat)
|
||
(require 'cl-lib)
|
||
|
||
|
||
;;; Customization
|
||
(defface cider-result-overlay-face
|
||
'((((class color) (background light))
|
||
:background "grey90" :box (:line-width -1 :color "yellow"))
|
||
(((class color) (background dark))
|
||
:background "grey10" :box (:line-width -1 :color "black")))
|
||
"Face used to display evaluation results at the end of line.
|
||
If `cider-overlays-use-font-lock' is non-nil, this face is
|
||
applied with lower priority than the syntax highlighting."
|
||
:group 'cider
|
||
:package-version '(cider "0.9.1"))
|
||
|
||
(defcustom cider-result-use-clojure-font-lock t
|
||
"If non-nil, interactive eval results are font-locked as Clojure code."
|
||
:group 'cider
|
||
:type 'boolean
|
||
:package-version '(cider . "0.10.0"))
|
||
|
||
(defcustom cider-overlays-use-font-lock t
|
||
"If non-nil, results overlays are font-locked as Clojure code.
|
||
If nil, apply `cider-result-overlay-face' to the entire overlay instead of
|
||
font-locking it."
|
||
:group 'cider
|
||
:type 'boolean
|
||
:package-version '(cider . "0.10.0"))
|
||
|
||
(defcustom cider-use-overlays 'both
|
||
"Whether to display evaluation results with overlays.
|
||
If t, use overlays. If nil, display on the echo area. If both, display on
|
||
both places.
|
||
|
||
Only applies to evaluation commands. To configure the debugger overlays,
|
||
see `cider-debug-use-overlays'."
|
||
:type '(choice (const :tag "End of line" t)
|
||
(const :tag "Bottom of screen" nil)
|
||
(const :tag "Both" both))
|
||
:group 'cider
|
||
:package-version '(cider . "0.10.0"))
|
||
|
||
(defcustom cider-eval-result-prefix "=> "
|
||
"The prefix displayed in the minibuffer before a result value."
|
||
:type 'string
|
||
:group 'cider
|
||
:package-version '(cider . "0.5.0"))
|
||
|
||
(defcustom cider-eval-result-duration 'command
|
||
"Duration, in seconds, of CIDER's eval-result overlays.
|
||
If nil, overlays last indefinitely.
|
||
If the symbol `command', they're erased after the next command.
|
||
Also see `cider-use-overlays'."
|
||
:type '(choice (integer :tag "Duration in seconds")
|
||
(const :tag "Until next command" command)
|
||
(const :tag "Last indefinitely" nil))
|
||
:group 'cider
|
||
:package-version '(cider . "0.10.0"))
|
||
|
||
|
||
;;; Overlay logic
|
||
(defun cider--delete-overlay (ov &rest _)
|
||
"Safely delete overlay OV.
|
||
Never throws errors, and can be used in an overlay's modification-hooks."
|
||
(ignore-errors (delete-overlay ov)))
|
||
|
||
(defun cider--make-overlay (l r type &rest props)
|
||
"Place an overlay between L and R and return it.
|
||
TYPE is a symbol put on the overlay's category property. It is used to
|
||
easily remove all overlays from a region with:
|
||
(remove-overlays start end 'category TYPE)
|
||
PROPS is a plist of properties and values to add to the overlay."
|
||
(let ((o (make-overlay l (or r l) (current-buffer))))
|
||
(overlay-put o 'category type)
|
||
(overlay-put o 'cider-temporary t)
|
||
(while props (overlay-put o (pop props) (pop props)))
|
||
(push #'cider--delete-overlay (overlay-get o 'modification-hooks))
|
||
o))
|
||
|
||
(defun cider--remove-result-overlay ()
|
||
"Remove result overlay from current buffer.
|
||
This function also removes itself from `post-command-hook'."
|
||
(remove-hook 'post-command-hook #'cider--remove-result-overlay 'local)
|
||
(remove-overlays nil nil 'category 'result))
|
||
|
||
(defun cider--remove-result-overlay-after-command ()
|
||
"Add `cider--remove-result-overlay' locally to `post-command-hook'.
|
||
This function also removes itself from `post-command-hook'."
|
||
(remove-hook 'post-command-hook #'cider--remove-result-overlay-after-command 'local)
|
||
(add-hook 'post-command-hook #'cider--remove-result-overlay nil 'local))
|
||
|
||
(defface cider-fringe-good-face
|
||
'((((class color) (background light)) :foreground "lightgreen")
|
||
(((class color) (background dark)) :foreground "darkgreen"))
|
||
"Face used on the fringe indicator for successful evaluation."
|
||
:group 'cider)
|
||
|
||
(defconst cider--fringe-overlay-good
|
||
(propertize " " 'display '(left-fringe empty-line cider-fringe-good-face))
|
||
"The before-string property that adds a green indicator on the fringe.")
|
||
|
||
(defcustom cider-use-fringe-indicators t
|
||
"Whether to display evaluation indicators on the left fringe."
|
||
:safe #'booleanp
|
||
:group 'cider
|
||
:type 'boolean
|
||
:package-version '(cider . "0.13.0"))
|
||
|
||
(defun cider--make-fringe-overlay (&optional end)
|
||
"Place an eval indicator at the fringe before a sexp.
|
||
END is the position where the sexp ends, and defaults to point."
|
||
(when cider-use-fringe-indicators
|
||
(with-current-buffer (if (markerp end)
|
||
(marker-buffer end)
|
||
(current-buffer))
|
||
(save-excursion
|
||
(if end
|
||
(goto-char end)
|
||
(setq end (point)))
|
||
(clojure-forward-logical-sexp -1)
|
||
;; Create the green-circle overlay.
|
||
(cider--make-overlay (point) end 'cider-fringe-indicator
|
||
'before-string cider--fringe-overlay-good)))))
|
||
|
||
(cl-defun cider--make-result-overlay (value &rest props &key where duration (type 'result)
|
||
(format (concat " " cider-eval-result-prefix "%s "))
|
||
(prepend-face 'cider-result-overlay-face)
|
||
&allow-other-keys)
|
||
"Place an overlay displaying VALUE at the end of line.
|
||
VALUE is used as the overlay's after-string property, meaning it is
|
||
displayed at the end of the overlay. The overlay itself is placed from
|
||
beginning to end of current line.
|
||
Return nil if the overlay was not placed or if it might not be visible, and
|
||
return the overlay otherwise.
|
||
|
||
Return the overlay if it was placed successfully, and nil if it failed.
|
||
|
||
This function takes some optional keyword arguments:
|
||
|
||
If WHERE is a number or a marker, apply the overlay over
|
||
the entire line at that place (defaulting to `point'). If
|
||
it is a cons cell, the car and cdr determine the start and
|
||
end of the overlay.
|
||
DURATION takes the same possible values as the
|
||
`cider-eval-result-duration' variable.
|
||
TYPE is passed to `cider--make-overlay' (defaults to `result').
|
||
FORMAT is a string passed to `format'. It should have
|
||
exactly one %s construct (for VALUE).
|
||
|
||
All arguments beyond these (PROPS) are properties to be used on the
|
||
overlay."
|
||
(declare (indent 1))
|
||
(while (keywordp (car props))
|
||
(setq props (cdr (cdr props))))
|
||
;; If the marker points to a dead buffer, don't do anything.
|
||
(let ((buffer (cond
|
||
((markerp where) (marker-buffer where))
|
||
((markerp (car-safe where)) (marker-buffer (car where)))
|
||
(t (current-buffer)))))
|
||
(with-current-buffer buffer
|
||
(save-excursion
|
||
(when (number-or-marker-p where)
|
||
(goto-char where))
|
||
;; Make sure the overlay is actually at the end of the sexp.
|
||
(skip-chars-backward "\r\n[:blank:]")
|
||
(let* ((beg (if (consp where)
|
||
(car where)
|
||
(save-excursion
|
||
(clojure-backward-logical-sexp 1)
|
||
(point))))
|
||
(end (if (consp where)
|
||
(cdr where)
|
||
(line-end-position)))
|
||
(display-string (format format value))
|
||
(o nil))
|
||
(remove-overlays beg end 'category type)
|
||
(funcall (if cider-overlays-use-font-lock
|
||
#'font-lock-prepend-text-property
|
||
#'put-text-property)
|
||
0 (length display-string)
|
||
'face prepend-face
|
||
display-string)
|
||
;; If the display spans multiple lines or is very long, display it at
|
||
;; the beginning of the next line.
|
||
(when (or (string-match "\n." display-string)
|
||
(> (string-width display-string)
|
||
(- (window-width) (current-column))))
|
||
(setq display-string (concat " \n" display-string)))
|
||
;; Put the cursor property only once we're done manipulating the
|
||
;; string, since we want it to be at the first char.
|
||
(put-text-property 0 1 'cursor 0 display-string)
|
||
(when (> (string-width display-string) (* 3 (window-width)))
|
||
(setq display-string
|
||
(concat (substring display-string 0 (* 3 (window-width)))
|
||
(substitute-command-keys
|
||
"...\nResult truncated. Type `\\[cider-inspect-last-result]' to inspect it."))))
|
||
;; Create the result overlay.
|
||
(setq o (apply #'cider--make-overlay
|
||
beg end type
|
||
'after-string display-string
|
||
props))
|
||
(pcase duration
|
||
((pred numberp) (run-at-time duration nil #'cider--delete-overlay o))
|
||
(`command
|
||
;; If inside a command-loop, tell `cider--remove-result-overlay'
|
||
;; to only remove after the *next* command.
|
||
(if this-command
|
||
(add-hook 'post-command-hook
|
||
#'cider--remove-result-overlay-after-command
|
||
nil 'local)
|
||
(cider--remove-result-overlay-after-command))))
|
||
(when-let* ((win (get-buffer-window buffer)))
|
||
;; Left edge is visible.
|
||
(when (and (<= (window-start win) (point) (window-end win))
|
||
;; Right edge is visible. This is a little conservative
|
||
;; if the overlay contains line breaks.
|
||
(or (< (+ (current-column) (string-width value))
|
||
(window-width win))
|
||
(not truncate-lines)))
|
||
o)))))))
|
||
|
||
|
||
;;; Displaying eval result
|
||
(defun cider--display-interactive-eval-result (value &optional point)
|
||
"Display the result VALUE of an interactive eval operation.
|
||
VALUE is syntax-highlighted and displayed in the echo area.
|
||
If POINT and `cider-use-overlays' are non-nil, it is also displayed in an
|
||
overlay at the end of the line containing POINT.
|
||
Note that, while POINT can be a number, it's preferable to be a marker, as
|
||
that will better handle some corner cases where the original buffer is not
|
||
focused."
|
||
(let* ((font-value (if cider-result-use-clojure-font-lock
|
||
(cider-font-lock-as-clojure value)
|
||
value))
|
||
(used-overlay (when (and point cider-use-overlays)
|
||
(cider--make-result-overlay font-value
|
||
:where point
|
||
:duration cider-eval-result-duration))))
|
||
(message
|
||
"%s"
|
||
(propertize (format "%s%s" cider-eval-result-prefix font-value)
|
||
;; The following hides the message from the echo-area, but
|
||
;; displays it in the Messages buffer. We only hide the message
|
||
;; if the user wants to AND if the overlay succeeded.
|
||
'invisible (and used-overlay
|
||
(not (eq cider-use-overlays 'both)))))))
|
||
|
||
|
||
;;; Fragile buttons
|
||
(defface cider-fragile-button-face
|
||
'((((type graphic))
|
||
:box (:line-width 3 :style released-button)
|
||
:inherit font-lock-warning-face)
|
||
(t :inverse-video t))
|
||
"Face for buttons that vanish when clicked."
|
||
:package-version '(cider . "0.12.0")
|
||
:group 'cider)
|
||
|
||
(define-button-type 'cider-fragile
|
||
'action 'cider--overlay-destroy
|
||
'follow-link t
|
||
'face nil
|
||
'modification-hooks '(cider--overlay-destroy)
|
||
'help-echo "RET: delete this.")
|
||
|
||
(defun cider--overlay-destroy (ov &rest r)
|
||
"Delete overlay OV and its underlying text.
|
||
If any other arguments are given (collected in R), only actually do anything
|
||
if the first one is non-nil. This is so it works in `modification-hooks'."
|
||
(unless (and r (not (car r)))
|
||
(let ((inhibit-modification-hooks t)
|
||
(beg (copy-marker (overlay-start ov)))
|
||
(end (copy-marker (overlay-end ov))))
|
||
(delete-overlay ov)
|
||
(delete-region beg end)
|
||
(goto-char beg)
|
||
(when (= (char-after) (char-before) ?\n)
|
||
(delete-char 1)))))
|
||
|
||
(provide 'cider-overlays)
|
||
;;; cider-overlays.el ends here
|