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Diffstat (limited to 'configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-navigate-imports.el')
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diff --git a/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-navigate-imports.el b/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-navigate-imports.el new file mode 100644 index 000000000000..7600d2305695 --- /dev/null +++ b/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-navigate-imports.el @@ -0,0 +1,130 @@ +;;; haskell-navigate-imports.el --- A function for cycling through Haskell import lists -*- lexical-binding: t -*- + +;; Copyright (C) 2010 Chris Done + +;; Author: Chris Done <chrisdone@gmail.com> + +;; This file is not part of GNU Emacs. + +;; 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: + +;; The cycling step will stop once at the last import list so +;; that it is easy to add a new import list. + +;; This module works completely independently of any libraries +;; (including haskell-mode). + +;; Exports three interactive functions: +;; 1. haskell-navigate-imports +;; 2. haskell-navigate-imports-go +;; 3. haskell-navigate-imports-return + +;; Example usage: + +;; (require 'haskell-navigate-imports) +;; (define-key haskell-mode-map (kbd "<f8>") 'haskell-navigate-imports) + +;;; Code: + +(defvar haskell-navigate-imports-start-point nil) + +(defvar haskell-literate) ; defined in haskell-mode.el + +;;;###autoload +(defun haskell-navigate-imports (&optional return) + "Cycle the Haskell import lines or return to point (with prefix arg)." + (interactive "P") + (if return + (haskell-navigate-imports-return) + (haskell-navigate-imports-go))) + +;;;###autoload +(defun haskell-navigate-imports-go () + "Go to the first line of a list of consecutive import lines. Cycles." + (interactive) + (unless (or (haskell-navigate-imports-line) + (equal (line-beginning-position) (point-min)) + (save-excursion (forward-line -1) + (haskell-navigate-imports-line))) + (setq haskell-navigate-imports-start-point (point))) + (haskell-navigate-imports-go-internal)) + +;;;###autoload +(defun haskell-navigate-imports-return () + "Return to the non-import point we were at before going to the module list. + If we were originally at an import list, we can just cycle through easily." + (interactive) + (when haskell-navigate-imports-start-point + (goto-char haskell-navigate-imports-start-point))) + +(defun haskell-navigate-imports-go-internal () + "Go to the first line of a list of consecutive import lines. Cycle." + (if (haskell-navigate-imports-line) + (progn (haskell-navigate-imports-goto-end) + (when (haskell-navigate-imports-find-forward-line) + (haskell-navigate-imports-go-internal))) + (let ((point (haskell-navigate-imports-find-forward-line))) + (if point + (goto-char point) + (progn (goto-char (point-min)) + (if (haskell-navigate-imports-find-forward-line) + (haskell-navigate-imports-go-internal) + (let ((module (if (eq haskell-literate 'bird) + "^> ?module" + "^module"))) + (when (search-forward-regexp module nil t 1) + (search-forward "\n\n" nil t 1))))))))) + +(defun haskell-navigate-imports-goto-end () + "Skip a bunch of consecutive import lines." + (while (not (or (equal (point) + (point-max)) + (not (haskell-navigate-imports-line)))) + (forward-line))) + +(defun haskell-navigate-imports-find-forward-line () + "Return a point with at an import line, or nothing." + (save-excursion + (while (not (or (equal (point) (point-max)) + (haskell-navigate-imports-after-imports-p) ;; This one just speeds it up. + (haskell-navigate-imports-line))) + (forward-line)) + (if (haskell-navigate-imports-line) + (point) + nil))) + +(defun haskell-navigate-imports-line () + "Try to match the current line as a regexp." + (let ((line (buffer-substring-no-properties (line-beginning-position) + (line-end-position))) + (import (if (eq haskell-literate 'bird) + "^> ?import " + "^import "))) + (if (string-match import line) + line + nil))) + +(defun haskell-navigate-imports-after-imports-p () + "Are we after the imports list? Just for a speed boost." + (save-excursion + (goto-char (line-beginning-position)) + (not (not (search-forward-regexp "\\( = \\|\\<instance\\>\\| :: \\)" + (line-end-position) t 1))))) + +(provide 'haskell-navigate-imports) + +;;; haskell-navigate-imports.el ends here |