mirror of
https://github.com/m00natic/vlfi.git
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157 lines
5.7 KiB
EmacsLisp
157 lines
5.7 KiB
EmacsLisp
;;; vlf-integrate.el --- VLF integration with other packages -*- lexical-binding: t -*-
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;; Copyright (C) 2014 Free Software Foundation, Inc.
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;; Keywords: large files, integration
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;; Author: Andrey Kotlarski <m00naticus@gmail.com>
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;; URL: https://github.com/m00natic/vlfi
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;; This file 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, or (at your option)
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;; any later version.
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;; This file 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 GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This package enables VLF play seamlessly with rest of Emacs.
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;;; Code:
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(defgroup vlf nil
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"View Large Files in Emacs."
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:prefix "vlf-"
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:group 'files)
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(defcustom vlf-application 'ask
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"Determines when `vlf' will be offered on opening files.
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Possible values are: nil to never use it;
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`ask' offer `vlf' when file size is beyond `large-file-warning-threshold';
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`dont-ask' automatically use `vlf' for large files;
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`always' use `vlf' for all files."
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:group 'vlf
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:type '(radio (const :format "%v " nil)
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(const :format "%v " ask)
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(const :format "%v " dont-ask)
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(const :format "%v" always)))
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(defcustom vlf-forbidden-modes-list
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'(archive-mode tar-mode jka-compr git-commit-mode image-mode
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doc-view-mode doc-view-mode-maybe ebrowse-tree-mode)
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"Major modes which VLF will not be automatically applied to."
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:group 'vlf
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:type '(list symbol))
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(unless (fboundp 'file-size-human-readable)
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(defun file-size-human-readable (file-size)
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"Print FILE-SIZE in MB."
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(format "%.3fMB" (/ file-size 1048576.0))))
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(defun vlf-determine-major-mode (filename)
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"Determine major mode from FILENAME."
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(let ((name filename)
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(remote-id (file-remote-p filename))
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mode)
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;; Remove backup-suffixes from file name.
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(setq name (file-name-sans-versions name))
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;; Remove remote file name identification.
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(and (stringp remote-id)
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(string-match (regexp-quote remote-id) name)
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(setq name (substring name (match-end 0))))
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(setq mode
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(if (memq system-type '(windows-nt cygwin))
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;; System is case-insensitive.
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(let ((case-fold-search t))
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(assoc-default name auto-mode-alist 'string-match))
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;; System is case-sensitive.
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(or ;; First match case-sensitively.
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(let ((case-fold-search nil))
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(assoc-default name auto-mode-alist 'string-match))
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;; Fallback to case-insensitive match.
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(and auto-mode-case-fold
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(let ((case-fold-search t))
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(assoc-default name auto-mode-alist
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'string-match))))))
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(if (and mode (consp mode))
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(cadr mode)
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mode)))
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(autoload 'vlf "vlf" "View Large FILE in batches." t)
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(defadvice abort-if-file-too-large (around vlf-if-file-too-large
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compile activate)
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"If file SIZE larger than `large-file-warning-threshold', \
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allow user to view file with `vlf', open it normally, or abort.
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OP-TYPE specifies the file operation being performed over FILENAME."
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(cond
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((or (not size) (zerop size)))
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((or (not vlf-application)
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(not filename)
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(memq (vlf-determine-major-mode filename)
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vlf-forbidden-modes-list))
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ad-do-it)
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((eq vlf-application 'always)
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(vlf filename)
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(error ""))
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((and large-file-warning-threshold
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(< large-file-warning-threshold size))
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(if (eq vlf-application 'dont-ask)
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(progn (vlf filename)
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(error ""))
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(let ((char nil))
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(while (not (memq (setq char
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(read-event
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(propertize
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(format
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"File %s is large (%s): \
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%s normally (o), %s with vlf (v) or abort (a)"
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(if filename
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(file-name-nondirectory filename)
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"")
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(file-size-human-readable size)
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op-type op-type)
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'face 'minibuffer-prompt)))
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'(?o ?O ?v ?V ?a ?A))))
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(cond ((memq char '(?v ?V))
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(vlf filename)
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(error ""))
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((memq char '(?a ?A))
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(error "Aborted"))))))))
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;; disable for some functions
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(defmacro vlf-disable-for-function (func file)
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"Build advice to disable VLF during execution of FUNC\
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defined in FILE."
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`(eval-after-load ,file
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'(defadvice ,func (around ,(intern (concat "vlf-"
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(symbol-name func)))
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compile activate)
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"Temporarily disable `vlf-mode'."
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(let ((vlf-application nil))
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ad-do-it))))
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(vlf-disable-for-function tags-verify-table "etags")
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(vlf-disable-for-function tag-find-file-of-tag-noselect "etags")
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(vlf-disable-for-function helm-etags-create-buffer "helm-tags")
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;; dired
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(defun dired-vlf ()
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"In Dired, visit the file on this line in VLF mode."
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(interactive)
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(vlf (dired-get-file-for-visit)))
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(eval-after-load "dired"
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'(define-key dired-mode-map "V" 'dired-vlf))
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(provide 'vlf-integrate)
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;;; vlf-integrate.el ends here
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