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;;; geiser-capf.el -- Setup for Geiser's CAPFs
;; Copyright (c) 2022 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Sat Apr 23, 2022 18:39
(require 'geiser-autodoc)
(require 'geiser-impl)
(require 'geiser-eval)
(require 'geiser-doc)
(require 'geiser-completion)
(require 'geiser-edit)
(defun geiser-capf--company-docsig (id)
(ignore-errors
(when (not (geiser-autodoc--inhibit))
(let ((help (geiser-autodoc--autodoc `((,id 0)) nil)))
(and help (substring-no-properties help))))))
(defun geiser-capf--company-doc-buffer (id)
(let* ((impl geiser-impl--implementation)
(module (geiser-eval--get-module))
(symbol (make-symbol id))
(ds (geiser-doc--get-docstring symbol module)))
(when (consp ds)
(with-current-buffer (get-buffer-create "*company-documentation*")
(geiser-doc--render-docstring ds symbol module impl)
(current-buffer)))))
(defun geiser-capf--company-location (id)
(ignore-errors
(when (not (geiser-autodoc--inhibit))
(let ((id (make-symbol id)))
(condition-case nil
(geiser-edit-module id 'noselect)
(error (geiser-edit-symbol id 'noselect)))))))
(defun geiser-capf--thing-at-point (module &optional predicate)
(with-syntax-table scheme-mode-syntax-table
(let* ((beg (geiser-completion--symbol-begin module))
(end (or (geiser-completion--prefix-end beg module) beg))
(prefix (and (> end beg) (buffer-substring-no-properties beg end)))
(prefix (and prefix
(if (string-match "\\([^-]+\\)-" prefix)
(match-string 1 prefix)
prefix)))
(cmps (and prefix (geiser-completion--complete prefix module))))
(when cmps
(list beg end cmps
:company-docsig #'geiser-capf--company-docsig
:company-doc-buffer #'geiser-capf--company-doc-buffer
:company-location #'geiser-capf--company-location)))))
(defun geiser-capf--for-symbol (&optional predicate)
(geiser-capf--thing-at-point nil predicate))
(defun geiser-capf--for-module (&optional predicate)
(geiser-capf--thing-at-point t predicate))
(defun geiser-capf--for-filename ()
(when (geiser-syntax--in-string-p)
(let ((comint-completion-addsuffix "\""))
(ignore-errors (comint-filename-completion)))))
(defun geiser-capf-setup (enable)
(set (make-local-variable 'completion-at-point-functions)
(if enable
'(geiser-capf--for-symbol
geiser-capf--for-module
geiser-capf--for-filename)
(default-value 'completion-at-point-functions))))
(defun geiser-capf-complete-module ()
"Complete module name at point."
(interactive)
(let ((completion-at-point-functions '(geiser-completion--for-module)))
(call-interactively 'completion-at-point)))
(provide 'geiser-capf)
;;; geiser-capf.el ends here
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