multi-line.el
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dotfiles/emacs.d/load.d/multi-line.el
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dotfiles/emacs.d/load.d/multi-line.el
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;;; multi-line.el --- multi-line statements -*- lexical-binding: t; -*-
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;; Copyright (C) 2015 Ivan Malison
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;; Author: Ivan Malison <IvanMalison@gmail.com>
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;; Keywords: multi line length whitespace programming
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;; URL: https://github.com/IvanMalison/multi-line
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;; Version: 0.0.0
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;; Package-Requires:
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU 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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; multi-line aims to provide a flexible framework for automatically
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;; multi-lining and single-lining function invocations, array and map
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;; literals and more. It relies on functions that are defined on a per
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;; major mode basis wherever it can so that function correctly across
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;; many different programming languages.
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;;; Code:
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(defvar multi-line-find-strategy)
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(defvar multi-line-enter-strategy)
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(defvar multi-line-multi-line-strategy)
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(defvar multi-line-single-line-strategy)
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(defun multi-line-lparenthesis-advance ()
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(re-search-forward "[[{(]"))
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(defun multi-line-up-list-back ()
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(up-list) (backward-sexp))
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(defclass multi-line-forward-sexp-enter-strategy ()
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((done-regex :initarg :done-regex :initform "[[:space:]]*\[[({]")
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(advance-fn :initarg :advance-fn :initform 'multi-line-lparenthesis-advance)
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(inside-fn :initarg :inside-fn :initform 'multi-line-up-list-back)))
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(defmethod multi-line-enter ((enter multi-line-forward-sexp-enter-strategy))
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(condition-case nil
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(while (not (looking-at (oref enter :done-regex)))
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(forward-sexp))
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('error
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(funcall (oref enter :inside-fn))))
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(funcall (oref enter :advance-fn)))
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(defun multi-line-comma-advance ()
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(re-search-forward ","))
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(defun multi-line-done-advance ()
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(re-search-forward "[)}\]")
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(backward-char))
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(defclass multi-line-forward-sexp-find-strategy ()
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((split-regex :initarg :split-regex :initform "[[:space:]]*,")
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(done-regex :initarg :done-regex :initform "[[:space:]]*[})]")
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(split-advance-fn :initarg :split-advance-fn :initform
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'multi-line-comma-advance)))
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(defmethod multi-line-should-stop ((strategy multi-line-forward-sexp-find-strategy))
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(cond
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((looking-at (oref strategy :done-regex)) :done)
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((looking-at (oref strategy :split-regex)) :candidate)
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(t nil)))
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(defmethod multi-line-find-next ((strategy multi-line-forward-sexp-find-strategy))
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(let (last last-point this-point)
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(setq this-point (point))
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(condition-case nil
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(while (and (not (equal this-point last-point))
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(not (setq last (multi-line-should-stop strategy))))
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(forward-sexp)
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(setq last-point this-point)
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(setq this-point (point)))
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('error (setq last :done))
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nil)
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(when (equal last :candidate) (funcall (oref strategy :split-advance-fn)))
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last))
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(defclass multi-line-never-newline ()
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((spacer :initarg :spacer :initform " ")))
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(defmethod multi-line-respace ((respacer multi-line-never-newline) index markers)
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(when (not (or (equal 0 index)
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(equal index (- (length markers) 1))))
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(insert (oref respacer :spacer))))
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(defclass multi-line-always-newline ()
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((always-first :initarg :always-first :initform t)
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(always-last :initarg :always-last :initform t)))
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(defmethod multi-line-should-newline ((respacer multi-line-always-newline)
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index markers)
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(let ((marker-length (length markers)))
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(or (and (equal 0 index) (oref respacer :always-first))
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(and (equal index (- marker-length 1)) (oref respacer :always-last)))))
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(defmethod multi-line-respace ((respacer multi-line-always-newline) index markers)
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(when (multi-line-should-newline respacer index markers)
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(newline-and-indent)))
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(defclass multi-line-column-number ()
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((newline-at :initarg :newline-at :initform 80)
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(newline-respacer :initarg :newline-respacer :initform
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(make-instance multi-line-always-newline))
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(default-respacer :initarg :default-respacer :initform
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(make-instance multi-line-never-newline))))
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(defmethod multi-line-should-newline ((respacer multi-line-column-number)
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index markers)
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(let ((marker-length (length markers)))
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(or (and (equal 0 index))
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(and (equal index (- marker-length 1)))
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(and (< (+ index 1) marker-length)
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(save-excursion
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(goto-char (marker-position (nth (+ index 1) markers )))
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(> (current-column) (oref respacer :newline-at)))))))
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(defmethod multi-line-respace ((respacer multi-line-column-number) index markers)
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(if (multi-line-should-newline respacer index markers)
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(newline-and-indent) (insert " ")))
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(defun multi-line-get-markers (enter-strategy find-strategy)
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(multi-line-enter enter-strategy)
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(let ((markers (list (point-marker))))
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(nconc markers
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(cl-loop until (equal (multi-line-find-next find-strategy) :done)
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collect (point-marker)))
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(nconc markers (list (point-marker)))))
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(defun multi-line-clear-whitespace-at-point ()
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(interactive)
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(let ((start (point)))
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(re-search-forward "[^[:space:]\n]")
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(backward-char)
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(kill-region start (point))))
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(defun multi-line-clear-whitespace ()
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(interactive)
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(let ((markers (multi-line-get-markers multi-line-enter-strategy
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multi-line-find-strategy)))
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(cl-loop for marker in markers do
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(goto-char (marker-position marker))
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(multi-line-clear-whitespace-at-point))))
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(defun multi-line-always-newline-and-indent ()
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(interactive)
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(let ((markers (multi-line-get-markers multi-line-enter-strategy
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multi-line-find-strategy)))
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(cl-loop for marker in markers do
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(goto-char (marker-position marker))
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(multi-line-clear-whitespace-at-point)
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(newline-and-indent))))
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(defun multi-line-adjust-whitespace (respacer)
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(let ((markers (multi-line-get-markers multi-line-enter-strategy
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multi-line-find-strategy)))
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(cl-loop for marker being the elements of markers using (index i) do
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(goto-char (marker-position marker))
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(multi-line-clear-whitespace-at-point)
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(multi-line-respace respacer i markers))))
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(defun multi-line-set-default-strategies ()
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(interactive)
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(setq multi-line-find-strategy
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(make-instance multi-line-forward-sexp-find-strategy)
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multi-line-enter-strategy
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(make-instance multi-line-forward-sexp-enter-strategy)
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multi-line-multi-line-strategy
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(make-instance multi-line-column-number)
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multi-line-single-line-strategy
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(make-instance multi-line-never-newline)))
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(defun multi-line-multiline ()
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(interactive)
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(multi-line-adjust-whitespace multi-line-multi-line-strategy))
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(defun multi-line-singleline ()
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(interactive)
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(multi-line-adjust-whitespace multi-line-single-line-strategy))
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(provide 'multi-line)
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;; flycheck-disabled-checkers: (emacs-lisp-checkdoc)
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;;; multi-line.el ends here
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