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idris-commands.el
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;;; idris-commands.el --- Commands for Emacs passed to idris -*- lexical-binding: t -*-
;; Copyright (C) 2013 Hannes Mehnert
;; Author: Hannes Mehnert <[email protected]> and David Raymond Christiansen <[email protected]>
;; License:
;; Inspiration is taken from SLIME/DIME (http://common-lisp.net/project/slime/) (https://github.com/dylan-lang/dylan-mode)
;; Therefore license is GPL
;; This file 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, or (at your option)
;; any later version.
;; This file 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 GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(require 'idris-core)
(require 'idris-settings)
(require 'inferior-idris)
(require 'idris-repl)
(require 'idris-warnings)
(require 'idris-compat)
(require 'idris-info)
(require 'idris-tree-info)
(require 'idris-log)
(require 'idris-ipkg-mode)
(require 'idris-warnings-tree)
(require 'idris-hole-list)
(require 'idris-prover)
(require 'idris-common-utils)
(require 'idris-syntax)
(require 'idris-highlight-input)
(require 'cl-lib)
(require 'thingatpt)
(defvar-local idris-load-to-here nil
"The maximum position to load")
(defun idris-make-dirty ()
"Mark an Idris buffer as dirty and remove the loaded region."
(setq idris-buffer-dirty-p t)
(when idris-loaded-region-overlay
(delete-overlay idris-loaded-region-overlay))
(setq idris-loaded-region-overlay nil))
(defun idris-make-clean ()
(setq idris-buffer-dirty-p nil))
(defun idris-current-buffer-dirty-p ()
"Check whether the current buffer's most recent version is loaded."
(or idris-buffer-dirty-p
(not (equal (current-buffer)
idris-currently-loaded-buffer))
;; for when we load the whole buffer
(and (not idris-load-to-here) (not idris-loaded-region-overlay))
;; true when the place to load is outside the loaded region - extend region!
(and idris-loaded-region-overlay
idris-load-to-here
(> (marker-position idris-load-to-here)
(overlay-end idris-loaded-region-overlay)))))
(defun idris-position-loaded-p (pos)
(and idris-loaded-region-overlay
(member idris-loaded-region-overlay (overlays-at pos))
t))
(defun idris-ensure-process-and-repl-buffer ()
"Ensure that an Idris process is running and the Idris REPL buffer exists."
(idris-run)
(idris-repl-buffer))
(defun idris-switch-working-directory (new-working-directory)
(unless (string= idris-process-current-working-directory new-working-directory)
(idris-ensure-process-and-repl-buffer)
(idris-eval `(:interpret ,(concat ":cd " new-working-directory)))
(setq idris-process-current-working-directory new-working-directory)))
(defun idris-list-holes-on-load ()
"Use the user's settings from customize to determine whether to list the holes."
(interactive)
(when idris-hole-show-on-load (idris-list-holes)))
(defcustom idris-load-file-success-hook '(idris-list-holes-on-load
idris-set-current-pretty-print-width)
"Functions to call when loading a file is successful"
:type 'hook
:options '(idris-list-holes-on-load
idris-set-current-pretty-print-width)
:group 'idris)
(defun idris-possibly-make-dirty (beginning end _length)
;; If there is a load-to-here marker and a currently loaded region, only
;; make the buffer dirty when the change overlaps the loaded region.
(if (and idris-load-to-here idris-loaded-region-overlay)
(when (member idris-loaded-region-overlay
(overlays-in beginning end))
(idris-make-dirty))
;; Otherwise just make it dirty.
(idris-make-dirty)))
(defun idris-update-loaded-region (fc)
(if fc
(let* ((end (assoc :end fc))
(line (cadr end))
(col (cl-caddr end)))
(when (overlayp idris-loaded-region-overlay)
(delete-overlay idris-loaded-region-overlay))
(with-current-buffer idris-currently-loaded-buffer
(setq idris-loaded-region-overlay
(make-overlay (point-min)
(save-excursion (goto-char (point-min))
(forward-line (1- line))
(move-to-column (1- col))
(point))
(current-buffer)))
(overlay-put idris-loaded-region-overlay 'face 'idris-loaded-region-face)))
;; HACK: Some versions of Idris don't properly return a span for
;; some modules, returning () instead. Remove this (and the
;; surrounding (if fc)) after Idris 0.9.17, which contains a fix.
(idris-update-loaded-region
`((:filename ,(cdr (idris-filename-to-load)))
(:start 1 1)
,(save-excursion
(goto-char (point-max))
`(:end ,(idris-get-line-num) 1))))))
(defun idris-load-to (&optional pos)
(when (not pos) (setq pos (point)))
(setq idris-load-to-here (copy-marker pos t))
(setq overlay-arrow-position (copy-marker (save-excursion
(goto-char pos)
(line-beginning-position)) nil)))
(defun idris-no-load-to ()
(setq idris-load-to-here nil)
(setq overlay-arrow-position nil))
(defun idris-load-forward-line (&optional nlines)
(interactive)
(when idris-load-to-here
(save-excursion
(goto-char idris-load-to-here)
(forward-line nlines)
(idris-load-to (point)))))
(defun idris-load-backward-line ()
(interactive)
(idris-load-forward-line -1))
(defun idris-filename-to-load ()
"Compute the working directory and filename to load in Idris, returning these as a cons."
(let* ((fn (buffer-file-name))
(ipkg-srcdir (idris-ipkg-find-src-dir))
(srcdir (if ipkg-srcdir
ipkg-srcdir
(file-name-directory fn))))
(when (and ;; check that srcdir is prefix of filename - then load relative
(> (length fn) (length srcdir))
(string= (substring fn 0 (length srcdir)) srcdir))
(setq fn (file-relative-name fn srcdir)))
(cons srcdir fn)))
(defun idris-load-file (&optional set-line)
"Pass the current buffer's file to the inferior Idris process.
A prefix argument restricts loading to the current
line."
(interactive "p")
(save-buffer)
(idris-ensure-process-and-repl-buffer)
(when (and set-line (= set-line 4)) (idris-load-to (point)))
(when (and set-line (= set-line 16)) (idris-no-load-to))
(if (buffer-file-name)
(when (idris-current-buffer-dirty-p)
(when idris-prover-currently-proving
(if (y-or-n-p (format "%s is open in the prover. Abandon and load? "
idris-prover-currently-proving))
(idris-prover-abandon)
(signal 'quit nil)))
;; Remove warning overlays
(idris-warning-reset-all)
;; Clear the contents of the compiler notes buffer, if it exists
(when (get-buffer idris-notes-buffer-name)
(with-current-buffer idris-notes-buffer-name
(let ((inhibit-read-only t)) (erase-buffer))))
;; Remove stale semantic highlighting
(idris-highlight-remove-overlays (current-buffer))
;; Actually do the loading
(let* ((dir-and-fn (idris-filename-to-load))
(fn (cdr dir-and-fn))
(srcdir (car dir-and-fn)))
(setq idris-currently-loaded-buffer nil)
(idris-switch-working-directory srcdir)
(idris-delete-ibc t) ;; delete the ibc to avoid interfering with partial loads
(idris-eval-async
(if idris-load-to-here
`(:load-file ,fn ,(save-excursion
(goto-char idris-load-to-here)
(idris-get-line-num)))
`(:load-file ,fn))
(lambda (result)
(pcase result
(`(:highlight-source ,hs)
(cl-loop
for h in hs
do (pcase h
(`(((:filename ,fn)
(:start ,start-line ,start-col)
(:end ,end-line ,end-col))
,props)
(when (string= (file-name-nondirectory fn)
(file-name-nondirectory (buffer-file-name)))
(idris-highlight-input-region (current-buffer)
start-line start-col
end-line end-col
props))))))
(_ (idris-make-clean)
(idris-update-options-cache)
(setq idris-currently-loaded-buffer (current-buffer))
(when (member 'warnings-tree idris-warnings-printing)
(idris-list-compiler-notes))
(run-hooks 'idris-load-file-success-hook)
(idris-update-loaded-region result))))
(lambda (_condition)
(when (member 'warnings-tree idris-warnings-printing)
(idris-list-compiler-notes)
(if idris-stay-in-current-window-on-compiler-error
(display-buffer (idris-buffer-name :notes))
(pop-to-buffer (idris-buffer-name :notes))))))))
(error "Cannot find file for current buffer")))
(defun idris-view-compiler-log ()
"Jump to the log buffer, if it is open"
(interactive)
(let ((buffer (get-buffer idris-log-buffer-name)))
(if buffer
(pop-to-buffer buffer)
(message "No Idris compiler log is currently open"))))
(defun idris-next-error ()
"Jump to the next error overlay in the buffer."
(interactive)
(let ((warnings-forward (sort (cl-remove-if-not #'(lambda (w) (> (overlay-start w) (point))) idris-warnings)
#'(lambda (w1 w2) (<= (overlay-start w1) (overlay-start w2))))))
(if warnings-forward
(goto-char (overlay-start (car warnings-forward)))
(error "No warnings or errors until end of buffer"))))
(defun idris-previous-error ()
"Jump to the previous error overlay in the buffer."
(interactive)
(let ((warnings-backward (sort (cl-remove-if-not #'(lambda (w) (< (overlay-end w) (point))) idris-warnings)
#'(lambda (w1 w2) (>= (overlay-end w1) (overlay-end w2))))))
(if warnings-backward
(goto-char (overlay-end (car warnings-backward)))
(error "No warnings or errors until beginning of buffer"))))
(defun idris-load-file-sync ()
"Pass the current buffer's file synchronously to the inferior
Idris process. This sets the load position to point, if there is one."
(save-buffer)
(idris-ensure-process-and-repl-buffer)
(if (buffer-file-name)
(unless (idris-position-loaded-p (point))
(idris-warning-reset-all)
(when (and idris-load-to-here
(< (marker-position idris-load-to-here) (point)))
(idris-load-to (point)))
(let* ((dir-and-fn (idris-filename-to-load))
(fn (cdr dir-and-fn))
(srcdir (car dir-and-fn)))
(setq idris-currently-loaded-buffer nil)
(idris-switch-working-directory srcdir)
(let ((result
(if idris-load-to-here
(idris-eval `(:load-file ,fn
,(save-excursion
(goto-char idris-load-to-here)
(idris-get-line-num))))
(idris-eval `(:load-file ,fn)))))
(idris-update-options-cache)
(setq idris-currently-loaded-buffer (current-buffer))
(idris-make-clean)
(idris-update-loaded-region (car result)))))
(error "Cannot find file for current buffer")))
(defun idris-get-line-num ()
"Get the current line number"
(save-restriction
(widen)
(save-excursion
(beginning-of-line)
(1+ (count-lines 1 (point))))))
(defun idris-thing-at-point ()
"Return the line number and name at point as a cons.
Use this in Idris source buffers."
(let ((line (idris-get-line-num)))
(cons
(if (equal (syntax-after (point))
(string-to-syntax "."))
;; We're on an operator.
(save-excursion
(skip-syntax-backward ".")
(let ((beg (point)))
(skip-syntax-forward ".")
(buffer-substring-no-properties beg (point))))
;; Try if we're on a symbol or fail otherwise.
(or (current-word t)
(error "Nothing identifiable under point")))
line)))
(defun idris-name-at-point ()
"Return the name at point, taking into account semantic
annotations. Use this in Idris source buffers or in
compiler-annotated output. Does not return a line number."
(let ((ref (cl-remove-if
#'null
(cons (get-text-property (point) 'idris-ref)
(cl-loop for overlay in (overlays-at (point))
collecting (overlay-get overlay 'idris-ref))))))
(if (null ref)
(car (idris-thing-at-point))
(car ref))))
(defun idris-info-for-name (what name)
"Display the type for a name"
(let* ((ty (idris-eval (list what name)))
(result (car ty))
(formatting (cdr ty)))
(idris-show-info (format "%s" result) formatting)))
(defun idris-type-at-point (thing)
"Display the type of the name at point, considered as a global variable"
(interactive "P")
(let ((name (if thing (read-string "Check: ")
(idris-name-at-point))))
(when name
(idris-info-for-name :type-of name))))
(defun idris-print-definition-of-name (thing)
"Display the definition of the function or type at point"
(interactive "P")
(let ((name (if thing (read-string "Print definition: ")
(idris-name-at-point))))
(when name
(idris-info-for-name :print-definition name))))
(defun idris-who-calls-name (name)
"Show the callers of NAME in a tree."
(let* ((callers (idris-eval `(:who-calls ,name)))
(roots (mapcar #'(lambda (c) (idris-caller-tree c :who-calls))
(car callers))))
(if (not (null roots))
(idris-tree-info-show-multiple roots "Callers")
(message "The name %s was not found." name))
nil))
(defun idris-who-calls-name-at-point (thing)
(interactive "P")
(let ((name (if thing (read-string "Who calls: ")
(idris-name-at-point))))
(when name
(idris-who-calls-name name))))
(defun idris-name-calls-who (name)
"Show the callees of NAME in a tree."
(let* ((callees (idris-eval `(:calls-who ,name)))
(roots (mapcar #'(lambda (c) (idris-caller-tree c :calls-who)) (car callees))))
(if (not (null roots))
(idris-tree-info-show-multiple roots "Callees")
(message "The name %s was not found." name))
nil))
(defun idris-name-calls-who-at-point (thing)
(interactive "P")
(let ((name (if thing (read-string "Calls who: ")
(idris-name-at-point))))
(when name
(idris-name-calls-who name))))
(defun idris-browse-namespace (namespace)
"Show the contents of NAMESPACE in a tree info buffer."
(interactive
;; Compute a default namespace for the prompt based on the text
;; annotations at point when called interactively. Overlays are
;; preferred over text properties.
(let ((default
(or (cl-some #'(lambda (o) (overlay-get o 'idris-namespace))
(overlays-at (point)))
(get-text-property (point) 'idris-namespace))))
(list (read-string "Browse namespace: " default))))
(idris-tree-info-show (idris-namespace-tree namespace)
"Browse Namespace"))
(defun idris-caller-tree (caller cmd)
"Display a tree from an IDE caller list, lazily retrieving a few levels at a time"
(pcase caller
(`((,name ,highlight) ,children)
(make-idris-tree
:item name
:highlighting highlight
:collapsed-p t
:kids (lambda ()
(cl-mapcan #'(lambda (child)
(let ((child-name (caar (idris-eval `(,cmd ,(car child))))))
(if child-name
(list (idris-caller-tree child-name cmd))
nil)))
children))
:preserve-properties '(idris-tt-tree)))
(_ (error "failed to make tree from %s" caller))))
(defun idris-namespace-tree (namespace &optional recursive)
"Create a tree of the contents of NAMESPACE, lazily retrieving children when RECURSIVE is non-nil."
(cl-flet*
;; Show names as childless trees with decorated roots
((name-tree (n) (make-idris-tree :item (car n)
:highlighting (cadr n)
:kids nil
:preserve-properties '(idris-tt-tree)))
;; The children of a tree are the namespaces followed by the names.
(get-children (sub-namespaces names)
(append (mapcar #'(lambda (ns)
(idris-namespace-tree ns t))
sub-namespaces)
(mapcar #'name-tree names))))
(let ((highlight `((0 ,(length namespace)
((:decor :namespace)
(:namespace ,namespace))))))
(if recursive
;; In the recursive case, generate a collapsed tree and lazily
;; get the contents as expansion is requested
(make-idris-tree
:item namespace
:highlighting highlight
:collapsed-p t
:kids (lambda ()
(pcase (idris-eval `(:browse-namespace ,namespace))
(`((,sub-namespaces ,names . ,_))
(get-children sub-namespaces names))
(_ nil)))
:preserve-properties '(idris-tt-term))
;; In the non-recursive case, generate an expanded tree with the
;; first level available, but only if the namespace actually makes
;; sense
(pcase (idris-eval `(:browse-namespace ,namespace))
(`((,sub-namespaces ,names . ,_))
(make-idris-tree
:item namespace
:highlighting highlight
:collapsed-p nil
:kids (get-children sub-namespaces names)
:preserve-properties '(idris-tt-term)))
(_ (error "Invalid namespace %s" namespace)))))))
(defun idris-newline-and-indent ()
"Indent a new line like the current one by default"
(interactive)
(let ((indent ""))
(save-excursion
(move-beginning-of-line nil)
(when (looking-at (if (idris-lidr-p) "^\\(>\\s-*\\)" "\\(\\s-*\\)"))
(setq indent (match-string 1))))
(insert "\n" indent)))
(defun idris-delete-forward-char (n &optional killflag)
"Delete the following N characters (previous if N is negative).
If the current buffer is in `idris-mode' and the file being
edited is a literate Idris file, deleting the end of a line will
take into account bird tracks. If Transient Mark mode is
enabled, the mark is active, and N is 1, delete the text in the
region and deactivate the mark instead. To disable this, set
`delete-active-region' to nil.
Optional second arg KILLFLAG non-nil means to kill (save in kill
ring) instead of delete. Interactively, N is the prefix arg, and
KILLFLAG is set if N was explicitly specified."
(interactive "p\nP")
(unless (integerp n)
(signal 'wrong-type-argument (list 'integerp n)))
(cond
;; Under the circumstances that `delete-forward-char' does something
;; special, delegate to it. This was discovered by reading the source to
;; it.
((and (use-region-p)
delete-active-region
(= n 1))
(call-interactively 'delete-forward-char n killflag))
;; If in idris-mode and editing an LIDR file and at the end of a line,
;; then delete the newline and a leading >, if it exists
((and (eq major-mode 'idris-mode)
(idris-lidr-p)
(= n 1)
(eolp))
(delete-char 1 killflag)
(when (and (not (eolp)) (equal (following-char) ?\>))
(delete-char 1 killflag)
(when (and (not (eolp)) (equal (following-char) ?\ ))
(delete-char 1 killflag))))
;; Nothing special to do - delegate to `delete-char', just as
;; `delete-forward-char' does
(t (delete-char 1 killflag))))
(defun idris-apropos (what)
"Look up something in names, type signatures, and docstrings"
(interactive "sSearch Idris docs for: ")
(idris-info-for-name :apropos what))
(defun idris-type-search (what)
"Search the Idris libraries by fuzzy type matching"
(interactive "sSearch for type: ")
(idris-info-for-name :interpret (concat ":search " what)))
(defun idris-docs-at-point (thing)
"Display the internal documentation for the name at point, considered as a global variable"
(interactive "P")
(let ((name (if thing (read-string "Docs: ")
(idris-name-at-point))))
(when name
(idris-info-for-name :docs-for name))))
(defun idris-eldoc-lookup ()
"Support for showing type signatures in the modeline when there's a running Idris"
(get-char-property (point) 'idris-eldoc))
(defun idris-pretty-print ()
"Get a term or definition pretty-printed by Idris. Useful for writing papers or slides."
(interactive)
(let ((what (read-string "What should be pretty-printed? "))
(fmt (completing-read "What format? " '("html", "latex") nil t nil nil "latex"))
(width (read-string "How wide? " nil nil "80")))
(if (<= (string-to-number width) 0)
(error "Width must be positive")
(if (< (length what) 1)
(error "Nothing to pretty-print")
(let ((text (idris-eval `(:interpret ,(concat ":pprint " fmt " " width " " what)))))
(with-idris-info-buffer
(insert (car text))
(goto-char (point-min))
(re-search-forward (if (string= fmt "latex")
"% START CODE\n"
"<!-- START CODE -->"))
(push-mark nil t)
(re-search-forward (if (string= fmt "latex")
"% END CODE\n"
"<!-- END CODE -->"))
(goto-char (match-beginning 0))
(copy-region-as-kill (mark) (point))
(message "Code copied to kill ring")))))))
(defun idris-case-split ()
"Case split the pattern variable at point"
(interactive)
(let ((what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:case-split ,(cdr what) ,(car what))))))
(if (<= (length result) 2)
(message "Can't case split %s" (car what))
(delete-region (line-beginning-position) (line-end-position))
(insert (substring result 0 (1- (length result)))))))))
(defun idris-make-cases-from-hole ()
"Make a case expression from the metavariable at point."
(interactive)
(let ((what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:make-case ,(cdr what) ,(car what))))))
(if (<= (length result) 2)
(message "Can't make cases from %s" (car what))
(delete-region (line-beginning-position) (line-end-position))
(insert (substring result 0 (1- (length result)))))))))
(defun idris-case-dwim ()
"If point is on a hole name, make it into a case expression. Otherwise, case split as a pattern variable."
(interactive)
(if (or (looking-at-p "\\?[a-zA-Z_]+")
(looking-back "\\?[a-zA-Z0-9_]+" nil))
(idris-make-cases-from-hole)
(idris-case-split)))
(defun idris-add-clause (proof)
"Add clauses to the declaration at point"
(interactive "P")
(let ((what (idris-thing-at-point))
(command (if proof :add-proof-clause :add-clause)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(,command ,(cdr what) ,(car what)))))
final-point
(prefix (save-excursion ; prefix is the indentation to insert for the clause
(goto-char (point-min))
(forward-line (1- (cdr what)))
(goto-char (line-beginning-position))
(re-search-forward "\\(^>?\\s-*\\)" nil t)
(let ((prefix (match-string 1)))
(if prefix
prefix
"")))))
;; Go forward until we get to a line with equal or less indentation to
;; the type declaration, or the end of the buffer, and insert the
;; result
(goto-char (line-beginning-position))
(forward-line)
(while (and (not (eobp))
(progn (goto-char (line-beginning-position))
;; this will be true if we're looking at the prefix
;; with extra whitespace
(looking-at-p (concat prefix "\\s-+"))))
(forward-line))
(insert prefix)
(setq final-point (point)) ;; Save the location of the start of the clause
(insert result)
(newline)
(goto-char final-point))))) ;; Put the cursor on the start of the inserted clause
(defun idris-add-missing ()
"Add missing cases"
(interactive)
(let ((what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:add-missing ,(cdr what) ,(car what))))))
(forward-line 1)
(insert result)))))
(defun idris-make-with-block ()
"Add with block"
(interactive)
(let ((what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:make-with ,(cdr what) ,(car what))))))
(beginning-of-line)
(kill-line)
(insert result)))))
(defun idris-make-lemma ()
"Extract lemma from hole"
(interactive)
(let ((what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let* ((result (car (idris-eval `(:make-lemma ,(cdr what) ,(car what)))))
(lemma-type (car result)))
;; There are two cases here: either a ?hole, or the {name} of a provisional defn.
(cond ((equal lemma-type :metavariable-lemma)
(let ((lem-app (cadr (assoc :replace-metavariable (cdr result))))
(type-decl (cadr (assoc :definition-type (cdr result)))))
;; replace the hole
;; assume point is on the hole right now!
(while (not (looking-at "\\?[a-zA-Z0-9?_]+"))
(backward-char 1))
;; now we're on the ? - we just matched the metavar
(replace-match lem-app)
;; now we add the type signature - search upwards for the current
;; signature, then insert before it
(re-search-backward (if (idris-lidr-p)
"^\\(>\\s-*\\)\\(([^)]+)\\|\\w+\\)\\s-*:"
"^\\(\\s-*\\)\\(([^)]+)\\|\\w+\\)\\s-*:"))
(let ((indentation (match-string 1)) end-point)
(beginning-of-line)
(insert indentation)
(setq end-point (point))
(insert type-decl)
(newline 2)
;; make sure point ends up ready to start a new pattern match
(goto-char end-point))))
((equal lemma-type :provisional-definition-lemma)
(let ((clause (cadr (assoc :definition-clause (cdr result)))))
;; Insert the definition just after the current definition
;; This can either be before the next type definition or at the end of
;; the buffer, if there is no next type definition
(let ((next-defn-point
(re-search-forward (if (idris-lidr-p)
"^\\(>\\s-*\\)\\(([^)]+)\\|\\w+\\)\\s-*:"
"^\\(\\s-*\\)\\(([^)]+)\\|\\w+\\)\\s-*:") nil t)))
(if next-defn-point ;; if we found a definition
(let ((indentation (match-string 1)) end-point)
(goto-char next-defn-point)
(beginning-of-line)
(insert indentation)
(setq end-point (point))
(insert clause)
(newline 2)
;; make sure point is at new defn
(goto-char end-point))
;; otherwise it goes at the end of the buffer
(let ((end (point-max)))
(goto-char end)
(insert clause)
(newline)
;; make sure point is at new defn
(goto-char end)))))))))))
(defun idris-compile-and-execute ()
"Execute the program in the current buffer"
(interactive)
(idris-load-file-sync)
(idris-eval '(:interpret ":exec")))
(defun idris-proof-search (&optional arg)
"Invoke the proof search. A plain prefix argument causes the
command to prompt for hints and recursion depth, while a numeric
prefix argument sets the recursion depth directly."
(interactive "P")
(let ((hints (if (consp arg)
(split-string (read-string "Hints: ") "[^a-zA-Z0-9']")
'()))
(depth (cond ((consp arg)
(let ((input (string-to-number (read-string "Search depth: "))))
(if (= input 0)
nil
(list input))))
((numberp arg)
(list arg))
(t nil)))
(what (idris-thing-at-point)))
(when (car what)
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:proof-search ,(cdr what) ,(car what) ,hints ,@depth)))))
(if (string= result "")
(error "Nothing found")
(save-excursion
(let ((start (progn (search-backward "?") (point)))
(end (progn (forward-char) (search-forward-regexp "[^a-zA-Z0-9_']") (backward-char) (point))))
(delete-region start end))
(insert result)))))))
(defun idris-refine (name)
"Refine by some NAME, without recursive proof search."
(interactive "MRefine by: ")
(let ((what (idris-thing-at-point)))
(unless (car what)
(error "Could not find a hole at point to refine by"))
(save-excursion (idris-load-file-sync))
(let ((result (car (idris-eval `(:refine ,(cdr what) ,(car what) ,name)))))
(save-excursion
(let ((start (progn (search-backward "?") (point)))
(end (progn (forward-char) (search-forward-regexp "[^a-zA-Z0-9_']") (backward-char) (point))))
(delete-region start end))
(insert result)))))
(defun idris-identifier-backwards-from-point ()
(let (identifier-start
(identifier-end (point))
(failure (list nil nil nil)))
(save-excursion
(while (and (> (point) (point-min)) (idris-is-ident-char-p (char-before)))
(backward-char)
(setq identifier-start (point)))
(if identifier-start
(list (buffer-substring-no-properties identifier-start identifier-end)
identifier-start
identifier-end)
failure))))
(defun idris-complete-symbol-at-point ()
"Attempt to complete the symbol at point as a global variable.
This function does not attempt to load the buffer if it's not
already loaded, as a buffer awaiting completion is probably not
type-correct, so loading will fail."
(if (not idris-process)
nil
(cl-destructuring-bind (identifier start end) (idris-identifier-backwards-from-point)
(when identifier
(let ((result (car (idris-eval `(:repl-completions ,identifier)))))
(cl-destructuring-bind (completions _partial) result
(if (null completions)
nil
(list start end completions
:exclusive 'no))))))))
(defun idris-complete-keyword-at-point ()
"Attempt to complete the symbol at point as an Idris keyword."
(pcase-let* ((all-idris-keywords
(append idris-keywords idris-definition-keywords))
(`(,identifier ,start ,end)
(idris-identifier-backwards-from-point)))
(when identifier
(let ((candidates (cl-remove-if-not
(apply-partially #'string-prefix-p identifier)
all-idris-keywords)))
(if (null candidates)
nil
(list start end candidates
:exclusive 'no))))))
(defun idris-list-holes ()
"Get a list of currently-open holes"
(interactive)
(idris-hole-list-show (car (idris-eval '(:metavariables 80)))))
(defun idris-kill-buffers ()
(idris-warning-reset-all)
(setq idris-currently-loaded-buffer nil)
;; not killing :events since it it tremendously useful for debuging
(let ((bufs (list :connection :repl :proof-obligations :proof-shell :proof-script :log :info :notes :holes :tree-viewer)))
(dolist (b bufs) (idris-kill-buffer b))))
(defun idris-pop-to-repl ()
"Go to the REPL, if one is open."
(interactive)
(let ((buf (get-buffer (idris-buffer-name :repl))))
(if buf
(pop-to-buffer buf)
(error "No Idris REPL buffer is open."))))
(defun idris-quit ()
"Quit the Idris process, cleaning up the state that it has synchronized with Emacs."
(interactive)
(setq idris-prover-currently-proving nil)
(let* ((pbufname (idris-buffer-name :process))
(pbuf (get-buffer pbufname))
(cbuf (get-buffer (idris-buffer-name :connection))))
(when cbuf
(when (get-buffer-process cbuf)
(with-current-buffer cbuf (delete-process nil))) ; delete connection without asking
(kill-buffer cbuf))
(when pbuf
(when (get-buffer-process pbuf)
(with-current-buffer pbuf (delete-process nil))) ; delete process without asking
(kill-buffer pbuf)
(unless (get-buffer pbufname) (idris-kill-buffers))
(setq idris-rex-continuations '())
(when idris-loaded-region-overlay
(delete-overlay idris-loaded-region-overlay)
(setq idris-loaded-region-overlay nil)))
(idris-prover-end)
(idris-kill-buffers)))
(defun idris-delete-ibc (no-confirmation)
"Delete the IBC file for the current buffer. A prefix argument
means to not ask for confirmation."
(interactive "P")
(let* ((fname (buffer-file-name))
(ibc (concat (file-name-sans-extension fname) ".ibc")))
(if (not (or (string= (file-name-extension fname) "idr")
(string= (file-name-extension fname) "lidr")))
(error "The current file is not an Idris file")
(when (or no-confirmation (y-or-n-p (concat "Really delete " ibc "?")))
(when (file-exists-p ibc)
(delete-file ibc)
(message "%s deleted" ibc))))))
(defun idris--active-term-beginning (term pos)
"Find the beginning of active term TERM that occurs at POS.
It is an error if POS is not in the specified term. TERM should
be Idris's own serialization of the term in question."
(unless (equal (get-char-property pos 'idris-tt-term) term)
(error "Term not present at %s" pos))
(save-excursion
;; Find the beginning of the active term
(goto-char pos)
(while (equal (get-char-property (point) 'idris-tt-term)
term)
(backward-char 1))
(forward-char 1)
(point)))
(defun idris-make-term-menu (_term)
"Make a menu for the widget for some term."
(let ((menu (make-sparse-keymap)))
(define-key menu [idris-term-menu-normalize]
`(menu-item "Normalize"
(lambda () (interactive))))
(define-key-after menu [idris-term-menu-show-implicits]
`(menu-item "Show implicits"
(lambda () (interactive))))
(define-key-after menu [idris-term-menu-hide-implicits]
`(menu-item "Hide implicits"
(lambda () (interactive))))
(define-key-after menu [idris-term-menu-core]
`(menu-item "Show core"
(lambda () (interactive))))
menu))
(defun idris-insert-term-widget (term)
"Make a widget for interacting with the term represented by TERM beginning at START-POS in the current buffer."
(let ((inhibit-read-only t)
(start-pos (copy-marker (point)))
(end-pos (copy-marker (idris-find-term-end (point) 1)))
(buffer (current-buffer)))
(insert-before-markers
(propertize
"▶"
'face 'idris-active-term-face
'mouse-face 'highlight
'idris-term-widget term
'help-echo "<mouse-3>: term menu"
'keymap (let ((map (make-sparse-keymap)))
(define-key map [mouse-3]
(lambda () (interactive)
(let ((selection
(x-popup-menu t (idris-make-term-menu term))))
(cond ((equal selection
'(idris-term-menu-normalize))
(idris-normalize-term start-pos buffer)
(idris-remove-term-widgets))
((equal selection
'(idris-term-menu-show-implicits))
(idris-show-term-implicits start-pos buffer)
(idris-remove-term-widgets))
((equal selection
'(idris-term-menu-hide-implicits))
(idris-hide-term-implicits start-pos buffer)
(idris-remove-term-widgets))
((equal selection
'(idris-term-menu-core))
(idris-show-core-term start-pos buffer)
(idris-remove-term-widgets))))))
map)))
(let ((term-overlay (make-overlay start-pos end-pos)))
;; TODO: delete the markers now that they're not useful
(overlay-put term-overlay 'idris-term-widget term)
(overlay-put term-overlay 'face 'idris-active-term-face))))
(defun idris-add-term-widgets ()
"Add interaction widgets to annotated terms."
(interactive)
(save-excursion
(goto-char (point-min))
(let (term)
(while (setq term (idris-search-property 'idris-tt-term))
(idris-insert-term-widget term)))))
(defun idris-remove-term-widgets (&optional buffer)
"Remove interaction widgets from annotated terms."
(interactive)
(with-current-buffer (or buffer (current-buffer))
(save-excursion
(let ((inhibit-read-only t))
(mapc (lambda (overlay)
(when (overlay-get overlay 'idris-term-widget)
(delete-overlay overlay)))
(overlays-in (point-min) (point-max)))
(goto-char (point-min))
(while (idris-search-property 'idris-term-widget)
(delete-char 1))))))
(defun idris-show-term-implicits (position &optional buffer)
"Replace the term at POSITION with a fully-explicit version."
(interactive "d")
(idris-active-term-command position :show-term-implicits buffer))
(defun idris-hide-term-implicits (position &optional buffer)
"Replace the term at POSITION with a fully-implicit version."
(interactive "d")
(idris-active-term-command position :hide-term-implicits buffer))
(defun idris-normalize-term (position &optional buffer)
"Replace the term at POSITION with a normalized version."
(interactive "d")
(idris-active-term-command position :normalise-term buffer))
(defun idris-show-core-term (position &optional buffer)
"Replace the term at POSITION with the corresponding core term."
(interactive "d")
(idris-active-term-command position :elaborate-term buffer))
(defun idris-active-term-command (position cmd &optional buffer)
"For the term at POSITION, Run the live term command CMD."
(unless (member cmd '(:show-term-implicits
:hide-term-implicits
:normalise-term
:elaborate-term))
(error "Invalid term command %s" cmd))
(with-current-buffer (or buffer (current-buffer))
(let ((term (plist-get (text-properties-at position) 'idris-tt-term)))
(if (null term)
(error "No term here")
(let* ((res (car (idris-eval (list cmd term))))
(new-term (car res))
(spans (cadr res))
(col (save-excursion (goto-char (idris-find-term-end position -1))
(current-column)))