123 lines
5.2 KiB
EmacsLisp
123 lines
5.2 KiB
EmacsLisp
;;; origami-parsers.el --- Collection of parsers -*- lexical-binding: t -*-
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;; Author: Greg Sexton <gregsexton@gmail.com>
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;; Version: 1.0
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;; Keywords: parsers
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;; URL: https://github.com/gregsexton/
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;; The MIT License (MIT)
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;; Copyright (c) 2014 Greg Sexton
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;; Permission is hereby granted, free of charge, to any person obtaining a copy
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;; of this software and associated documentation files (the "Software"), to deal
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;; in the Software without restriction, including without limitation the rights
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;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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;; copies of the Software, and to permit persons to whom the Software is
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;; furnished to do so, subject to the following conditions:
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;; The above copyright notice and this permission notice shall be included in
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;; all copies or substantial portions of the Software.
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;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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;; THE SOFTWARE.
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;;; Commentary:
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;;; Code:
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(require 'cl)
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(defcustom origami-parser-alist
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'((java-mode . origami-c-style-parser)
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(c-mode . origami-c-style-parser)
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(c++-mode . origami-c-style-parser)
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(perl-mode . origami-c-style-parser)
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(cperl-mode . origami-c-style-parser)
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(js-mode . origami-c-style-parser)
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(js2-mode . origami-c-style-parser)
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(js3-mode . origami-c-style-parser)
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(emacs-lisp-mode . origami-elisp-parser)
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(lisp-interaction-mode . origami-elisp-parser)
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(clojure-mode . origami-clj-parser))
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"alist mapping major-mode to parser function."
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:type 'hook
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:group 'origami)
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(defun origami-get-positions (content regex)
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(with-temp-buffer
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(insert content)
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(goto-char (point-min))
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(let (acc)
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(while (re-search-forward regex nil t)
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(let ((match (match-string 0)))
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(setq acc (cons (cons match (- (point) (length match)))
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acc))))
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(reverse acc))))
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(defun origami-build-pair-tree (create open close positions)
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(cl-labels ((build (positions)
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;; this is so horrible, but fast
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(let (acc beg (should-continue t))
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(while (and should-continue positions)
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(cond ((equal (caar positions) open)
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(if beg ;go down a level
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(let* ((res (build positions))
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(new-pos (car res))
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(children (cdr res)))
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(setq positions (cdr new-pos))
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(setq acc (cons (funcall create beg (cdar new-pos) (length open) children)
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acc))
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(setq beg nil))
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;; begin a new pair
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(setq beg (cdar positions))
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(setq positions (cdr positions))))
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((equal (caar positions) close)
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(if beg
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(progn ;close with no children
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(setq acc (cons (funcall create beg (cdar positions) (length close) nil)
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acc))
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(setq positions (cdr positions))
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(setq beg nil))
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(setq should-continue nil)))))
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(cons positions (reverse acc)))))
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(cdr (build positions))))
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(defun origami-c-style-parser (create)
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(lambda (content)
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(let ((positions (origami-get-positions content "[{}]")))
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(origami-build-pair-tree create "{" "}" positions))))
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(defun origami-lisp-parser (create regex)
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(lambda (content)
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(with-temp-buffer
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(insert content)
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(goto-char (point-min))
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(beginning-of-defun -1)
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(let (beg end offset acc)
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(while (< (point) (point-max))
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(setq beg (point))
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(search-forward-regexp regex nil t)
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(setq offset (- (point) beg))
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(end-of-defun)
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(backward-char) ;move point to one after the last paren
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(setq end (1- (point))) ;don't include the last paren in the fold
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(when (> offset 0)
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(setq acc (cons (funcall create beg end offset nil) acc)))
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(beginning-of-defun -1))
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(reverse acc)))))
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(defun origami-elisp-parser (create)
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(origami-lisp-parser create "(def\\w*\\s-*\\(\\s_\\|\\w\\|[?!]\\)*\\([ \\t]*(.*?)\\)?"))
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(defun origami-clj-parser (create)
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(origami-lisp-parser create "(def\\(\\w\\|-\\)*\\s-*\\(\\s_\\|\\w\\|[?!]\\)*\\([ \\t]*\\[.*?\\]\\)?"))
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(provide 'origami-parsers)
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;;; origami-parsers.el ends here
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