261 lines
9.9 KiB
EmacsLisp
261 lines
9.9 KiB
EmacsLisp
;;; matlab-compat.el --- Compatibility Code
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;;
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;; Copyright (C) 2019 Eric Ludlam
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;;
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;; Author: Eric Ludlam <eludlam@osboxes>
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;;
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation, either version 3 of the
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;; License, or (at your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see https://www.gnu.org/licenses/.
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;;; Commentary:
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;;
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;; To support a wide range of different Emacs versions, these compat
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;; functions will hide away the shims needed to work cross platform.
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;;; Code:
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(eval-and-compile
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(if (string-match "X[Ee]macs" emacs-version)
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(progn
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(defalias 'matlab-make-overlay 'make-extent)
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(defalias 'matlab-overlay-put 'set-extent-property)
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(defalias 'matlab-overlay-get 'extent-property)
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(defalias 'matlab-delete-overlay 'delete-extent)
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(defalias 'matlab-overlay-start 'extent-start-position)
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(defalias 'matlab-overlay-end 'extent-end-position)
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(defalias 'matlab-previous-overlay-change 'previous-extent-change)
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(defalias 'matlab-next-overlay-change 'next-extent-change)
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(defalias 'matlab-overlays-at
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(lambda (pos) (when (fboundp 'extent-list) (extent-list nil pos pos))))
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(defalias 'matlab-cancel-timer 'delete-itimer)
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(defun matlab-run-with-idle-timer (secs repeat function &rest args)
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(condition-case nil
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(apply 'start-itimer
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"matlab" function secs
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(if repeat secs nil) t
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t (car args)))
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(error
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;; If the above doesn't work, then try this old version of
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;; start itimer.
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(when (fboundp 'start-itimer)
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(start-itimer "matlab" function secs (if repeat secs nil)))))
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)
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;; Else GNU Emacs
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(defalias 'matlab-make-overlay 'make-overlay)
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(defalias 'matlab-overlay-put 'overlay-put)
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(defalias 'matlab-overlay-get 'overlay-get)
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(defalias 'matlab-delete-overlay 'delete-overlay)
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(defalias 'matlab-overlay-start 'overlay-start)
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(defalias 'matlab-overlay-end 'overlay-end)
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(defalias 'matlab-previous-overlay-change 'previous-overlay-change)
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(defalias 'matlab-next-overlay-change 'next-overlay-change)
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(defalias 'matlab-overlays-at 'overlays-at)
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(defalias 'matlab-cancel-timer 'cancel-timer)
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(defalias 'matlab-run-with-idle-timer 'run-with-idle-timer)
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))
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;;; Helper aliases to suppress compiler warnings ===============================
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(eval-and-compile
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;; `set-face-underline-p' is an obsolete function (as of 24.3); use `set-face-underline' instead.
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(cond ((fboundp 'set-face-underlined)
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(defalias 'matlab-set-face-underline 'set-face-underlined))
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(t
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(defalias 'matlab-set-face-underline 'set-face-underline-p)))
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;; `set-face-bold-p' is an obsolete function (as of 24.4); use `set-face-bold' instead.
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(cond ((fboundp 'set-face-bold)
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(defalias 'matlab-set-face-bold 'set-face-bold))
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(t
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(defalias 'matlab-set-face-bold 'set-face-bold-p)))
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;; `default-fill-column' is an obsolete variable (as of 23.2); use `fill-column' instead.
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(cond ((boundp 'fill-column)
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(defvaralias 'matlab-fill-column 'fill-column))
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(t
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(defvaralias 'matlab-fill-column 'default-fill-column)))
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;; `interactive-p' is an obsolete function (as of 23.2); use `called-interactively-p' instead.
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(defun matlab-called-interactively-p-helper ()
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(called-interactively-p 'interactive))
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(cond ((fboundp 'called-interactively-p)
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(defalias 'matlab-called-interactively-p 'matlab-called-interactively-p-helper))
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(t
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(defalias 'matlab-called-interactively-p 'interactive-p)))
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;; `toggle-read-only' is an obsolete function (as of 24.3); use `read-only-mode' instead.
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;; (matlab-read-only-mode -1) ==> make writable
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;; (matlab-read-only-mode 1) ==> make read-only
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(cond ((fboundp 'read-only-mode)
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(defalias 'matlab-read-only-mode 'read-only-mode))
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(t
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(defalias 'matlab-read-only-mode 'toggle-read-only)))
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(cond ((fboundp 'point-at-bol)
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(defalias 'matlab-point-at-bol 'point-at-bol)
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(defalias 'matlab-point-at-eol 'point-at-eol))
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;; Emacs 20.4
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((fboundp 'line-beginning-position)
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(defalias 'matlab-point-at-bol 'line-beginning-position)
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(defalias 'matlab-point-at-eol 'line-end-position))
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(t
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(defmacro matlab-point-at-bol ()
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(save-excursion (beginning-of-line) (point)))
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(defmacro matlab-point-at-eol ()
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(save-excursion (end-of-line) (point)))))
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)
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;; Keymaps
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(if (fboundp 'set-keymap-parent)
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(defalias 'matlab-set-keymap-parent 'set-keymap-parent)
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;; 19.31 doesn't have set-keymap-parent
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(eval-when-compile
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(require 'comint))
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(defun matlab-set-keymap-parent (keymap parent)
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"Set KEYMAP's parent to be PARENT."
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(nconc keymap comint-mode-map)))
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;; String trim
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(if (locate-library "subr-x")
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(progn
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(require 'subr-x)
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(defalias 'matlab-string-trim 'string-trim)
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)
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(defsubst matlab-string-trim (string &optional regexp)
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"Trim STRING of leading string matching REGEXP.
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REGEXP defaults to \"[ \\t\\n\\r]+\"."
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(let ((out string)
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(regexp_ (or regexp "[ \t\n\r]+")))
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(when (string-match (concat "\\`\\(?:" regexp_ "\\)") out)
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(setq out (substring out (match-end 0))))
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(when (string-match (concat "\\(?:" regexp_ "\\)\\'") out)
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(setq out (substring out 0 (match-beginning 0))))
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out))
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)
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;; OBARRAYS
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(if (fboundp 'obarray-make)
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(defalias 'matlab-obarray-make 'obarray-make)
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(defun matlab-obarray-make (sz) (make-vector sz 0)))
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;; Finding executables
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(defun matlab-find-executable-directory (program)
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"Find the executable PROGRAM on the exec path, following any links.
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Return the base directory it is in."
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(let ((dir nil))
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(dolist (P exec-path)
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(let ((nm (expand-file-name program P)))
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(when (and (file-exists-p nm) (file-executable-p nm))
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(let* ((fa (file-attributes nm))
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(lnk (car fa)))
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;; The car is t for a directory, a string for a link, nil otherwise
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(if (stringp lnk)
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;; We have a link - use that as our directory.
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(setq dir (file-name-directory lnk))
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;; No link - just use this path.
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(setq dir P)))
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)))
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dir))
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;; Completion Tools
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(defun matlab-display-completion-list (completions common-substring)
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"Method for displaying COMPLETIONS with a COMMON-SUBSTRING."
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;; In emacs 24.4 the common-substring is no longer needed.
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(let ((args (if (or (< emacs-major-version 24)
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(and (= emacs-major-version 24) (< emacs-minor-version 4)))
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(list completions common-substring)
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(list completions))))
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(apply 'display-completion-list args)))
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;; Font lock
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(require 'font-lock)
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(unless (fboundp 'font-lock-ensure)
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(defalias 'font-lock-ensure 'font-lock-fontify-buffer))
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;; CEDET compat if CEDET isn't around
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(condition-case nil
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(progn
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(require 'pulse)
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)
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(error
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(defun pulse-momentary-highlight-region (start end &optional face)
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"Compat impl of pulse command." nil)))
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;; EIEIO compatibility
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(condition-case nil
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(progn
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(require 'eieio)
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(unless (fboundp 'cl-defgeneric)
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;; We are in an antique Emacs that uses the old eieio.
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(defalias 'cl-defmethod 'defmethod)
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)
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(unless (fboundp 'cl-call-next-method)
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;; We are in an antique Emacs that uses the old eieio.
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(defalias 'cl-call-next-method 'call-next-method)
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)
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)
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(error (message "EIEIO not available. Only MATLAB editing enabled.")))
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;;; Finding EmacsClient
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(defun matlab-find-emacsclient ()
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"Locate the emacsclient correspoinding to the current emacs
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binary defined by `invocation-name' in `invocation-directory'"
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(let ((ec "emacsclient"))
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(cond
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;; Mac
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((equal system-type 'darwin)
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(if (file-exists-p (concat invocation-directory "emacsclient")) ;; running the default emacs?
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(setq ec (concat invocation-directory "emacsclient"))
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;; On Mac, one can install into
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;; /Applications/Emacs.app/Contents/MacOS/Emacs
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;; /Applications/Emacs.app/Contents/MacOS/bin/emacsclient
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(if (file-exists-p (concat invocation-directory "bin/emacsclient"))
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(setq ec (concat invocation-directory "bin/emacsclient")))))
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;; Windows
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((equal system-type 'windows-nt)
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(if (file-exists-p (concat invocation-directory "emacsclientw.exe"))
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(setq ec (concat invocation-directory "emacsclientw.exe"))
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(error "unable to locate emacsclientw.exe. It should be in %s" invocation-directory)))
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;; Linux or other UNIX system
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(t
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;; Debian 9 can be setup to have:
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;; /usr/bin/emacs
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;; /usr/bin/emacsclient
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;; /usr/bin/emacs24
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;; /usr/bin/emacsclient.emacs24
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;; /usr/bin/emacs25
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;; /usr/bin/emacsclient.emacs25
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(if (and (equal invocation-name "emacs")
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(file-exists-p (concat invocation-directory "emacsclient")))
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(setq ec (concat invocation-directory "emacsclient"))
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(if (file-exists-p (concat invocation-directory "emacsclient." invocation-name))
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(setq ec (concat invocation-directory "emacsclient." invocation-name))))))
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;; Return, ec, the emacsclient to use
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ec
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))
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(provide 'matlab-compat)
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;;; matlab-compat.el ends here
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;; LocalWords: el Ludlam eludlam osboxes Ee progn defalias fboundp itimer
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;; LocalWords: defun boundp defvaralias bol eol defmacro Keymaps keymap comint
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;; LocalWords: KEYMAP's nconc dolist nm lnk setq
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