branch: externals/dired-preview commit 33a27a68dc71741d7794f73e719fac01abcafc00 Author: Protesilaos Stavrou <i...@protesilaos.com> Commit: Protesilaos Stavrou <i...@protesilaos.com>
Add README.org, which GNU ELPA converts into the Info manual --- README.org | 682 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ doclicense.texi | 505 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1187 insertions(+) diff --git a/README.org b/README.org new file mode 100644 index 0000000000..3613a76d20 --- /dev/null +++ b/README.org @@ -0,0 +1,682 @@ +#+title: dired-preview.el: automatically preview files in Dired +#+author: Protesilaos Stavrou +#+email: i...@protesilaos.com +#+language: en +#+options: ':t toc:nil author:t email:t num:t +#+startup: content +#+macro: stable-version 0.1.0 +#+macro: release-date N/A +#+macro: development-version 0.2.0-dev +#+macro: file @@texinfo:@file{@@$1@@texinfo:}@@ +#+macro: space @@texinfo:@: @@ +#+macro: kbd @@texinfo:@kbd{@@$1@@texinfo:}@@ +#+export_file_name: dired-preview.texi +#+texinfo_filename: dired-preview.info +#+texinfo_dir_category: Emacs misc features +#+texinfo_dir_title: Dired-Preview: (dired-preview) +#+texinfo_dir_desc: Automatically preview files in Dired +#+texinfo_header: @set MAINTAINERSITE @uref{https://protesilaos.com,maintainer webpage} +#+texinfo_header: @set MAINTAINER Protesilaos Stavrou +#+texinfo_header: @set MAINTAINEREMAIL @email{i...@protesilaos.com} +#+texinfo_header: @set MAINTAINERCONTACT @uref{mailto:i...@protesilaos.com,contact the maintainer} + +#+texinfo: @insertcopying + +This manual, written by Protesilaos Stavrou, describes the +functionality and customization options of ~dired-preview~ (or +~dired-preview.el~) package, and provides every other piece of +information pertinent to it. + +The documentation furnished herein corresponds to stable version +{{{stable-version}}}, released on {{{release-date}}}. Any reference +to a newer feature which does not yet form part of the latest tagged +Git commit, is explicitly marked as such. + +Current development target is {{{development-version}}}. + ++ Package name (GNU ELPA): ~dired-preview~ ++ Official manual: <https://protesilaos.com/emacs/dired-preview> ++ Git repo on SourceHut: <https://git.sr.ht/~protesilaos/dired-preview> + - Mirrors: + + GitHub: <https://github.com/protesilaos/dired-preview> + + GitLab: <https://gitlab.com/protesilaos/dired-preview> ++ Mailing list: <https://lists.sr.ht/~protesilaos/general-issues> ++ Backronym: Directories Invariably Render Everything Decently; PDFs + Require Extra Viewing Instructions for Emacs to Work. + +#+toc: headlines 8 insert TOC here, with eight headline levels + +* COPYING +:PROPERTIES: +:COPYING: t +:CUSTOM_ID: h:475b7969-8a84-4ae6-9bf8-3a7cb741cd64 +:END: + +Copyright (C) 2023 Free Software Foundation, Inc. + +#+begin_quote +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, with the Front-Cover Texts being “A GNU Manual,” and +with the Back-Cover Texts as in (a) below. A copy of the license is +included in the section entitled “GNU Free Documentation License.” + +(a) The FSF’s Back-Cover Text is: “You have the freedom to copy and +modify this GNU manual.” +#+end_quote + +* Overview +:PROPERTIES: +:CUSTOM_ID: h:b518b406-ed29-4739-9b55-fd633e957b22 +:END: + +This is a simple and robust package to automatically preview in a side +window the file at point in Dired buffers. Preview windows are closed +when they are no longer relevant, while preview buffers are killed if +they have not been used for other purposes beside previewing. + +#+findex: dired-preview-mode +#+findex: dired-preview-global-mode +Enable the ~dired-preview-mode~ in the current Dired buffer or +~dired-preview-global-mode~ for all Dired buffers and then perform the +regular up/down motions. Those will trigger the preview. + +#+vindex: dired-preview-max-size +#+vindex: dired-preview-delay +The previewed file is displayed in a side window if its size is below +the number specified in the user option ~dired-preview-max-size~. +Previews are shown subject to a small delay, per ther user option +~dired-preview-delay~. + +#+vindex: dired-preview-ignored-extensions-regexp +Files matching the ~dired-preview-ignored-extensions-regexp~ are not +previewed. The default value of that user option includes multimedia, +PDFs, and EPUBs. + +[ In the near future, we may find ways to quickly preview any file + type without affecting the performance of Emacs. ] + +I took inspiration for ~dired-preview~ from the now unmaintained +~peep-dired~ package by Adam Sokolnicki: <https://github.com/asok/peep-dired>. +My original plan was to volunteer to maintain ~peep-dired~ but I +decided to write it my own way: it was easier for me, plus I can +implement only what I consider necessary without upsetting existing +users. + +* Installation +:PROPERTIES: +:CUSTOM_ID: h:30b9c20c-071d-4943-a9a7-e8d7e7ea33e3 +:END: +#+cindex: Installation instructions + +** GNU ELPA package +:PROPERTIES: +:CUSTOM_ID: h:9dfb9c7c-a57b-472a-bdf6-5fb88f9ebe74 +:END: + +The package is available as ~dired-preview~. Simply do: + +: M-x package-refresh-contents +: M-x package-install + +And search for it. + +GNU ELPA provides the latest stable release. Those who prefer to follow +the development process in order to report bugs or suggest changes, can +use the version of the package from the GNU-devel ELPA archive. Read: +https://protesilaos.com/codelog/2022-05-13-emacs-elpa-devel/. + +** Manual installation +:PROPERTIES: +:CUSTOM_ID: h:53495b27-c15d-4c9a-b6fc-f94a0ee55834 +:END: + +Assuming your Emacs files are found in =~/.emacs.d/=, execute the +following commands in a shell prompt: + +#+begin_src sh +cd ~/.emacs.d + +# Create a directory for manually-installed packages +mkdir manual-packages + +# Go to the new directory +cd manual-packages + +# Clone this repo, naming it "dired-preview" +git clone https://git.sr.ht/~protesilaos/dired-preview dired-preview +#+end_src + +Finally, in your =init.el= (or equivalent) evaluate this: + +#+begin_src emacs-lisp +;; Make Elisp files in that directory available to the user. +(add-to-list 'load-path "~/.emacs.d/manual-packages/dired-preview") +#+end_src + +Everything is in place to set up the package. + +* Sample configuration +:PROPERTIES: +:CUSTOM_ID: h:088fc7b3-7d7b-434b-80b1-e2ad20bdb4ea +:END: +#+cindex: Package configuration + +Remember to read the doc string of each of these variables or functions. + +#+begin_src emacs-lisp +(require 'dired-preview) + +(add-hook 'dired-mode-hook #'dired-preview-mode) +#+end_src + +* Acknowledgements +:PROPERTIES: +:CUSTOM_ID: h:72a35028-5b0c-4835-9e3a-8869b9241f1a +:END: +#+cindex: Contributors + +This project is meant to be a collective effort. Every bit of help +matters. + ++ Author/maintainer :: Protesilaos Stavrou. + ++ Contributions to code or the manual :: Bruno Boal, Christian Tietze, + Karthik Chikmagalur. + ++ Ideas and/or user feedback :: Bruno Boal, Ed Hamilton, Karthik + Chikmagalur, Peter Prevos. + +* GNU Free Documentation License +:PROPERTIES: +:CUSTOM_ID: h:59ce922f-fb7e-4925-8101-a9fef614abb3 +:END: + +#+texinfo: @include doclicense.texi + +#+begin_export html +<pre> + + GNU Free Documentation License + Version 1.3, 3 November 2008 + + + Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. + <https://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +0. PREAMBLE + +The purpose of this License is to make a manual, textbook, or other +functional and useful document "free" in the sense of freedom: to +assure everyone the effective freedom to copy and redistribute it, +with or without modifying it, either commercially or noncommercially. +Secondarily, this License preserves for the author and publisher a way +to get credit for their work, while not being considered responsible +for modifications made by others. + +This License is a kind of "copyleft", which means that derivative +works of the document must themselves be free in the same sense. It +complements the GNU General Public License, which is a copyleft +license designed for free software. + +We have designed this License in order to use it for manuals for free +software, because free software needs free documentation: a free +program should come with manuals providing the same freedoms that the +software does. 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You may include a +translation of this License, and all the license notices in the +Document, and any Warranty Disclaimers, provided that you also include +the original English version of this License and the original versions +of those notices and disclaimers. In case of a disagreement between +the translation and the original version of this License or a notice +or disclaimer, the original version will prevail. + +If a section in the Document is Entitled ``Acknowledgements'', +``Dedications'', or ``History'', the requirement (section 4) to Preserve +its Title (section 1) will typically require changing the actual +title. + +@item +TERMINATION + +You may not copy, modify, sublicense, or distribute the Document +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense, or distribute it is void, and +will automatically terminate your rights under this License. + +However, if you cease all violation of this License, then your license +from a particular copyright holder is reinstated (a) provisionally, +unless and until the copyright holder explicitly and finally +terminates your license, and (b) permanently, if the copyright holder +fails to notify you of the violation by some reasonable means prior to +60 days after the cessation. + +Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + +Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, receipt of a copy of some or all of the same material does +not give you any rights to use it. + +@item +FUTURE REVISIONS OF THIS LICENSE + +The Free Software Foundation may publish new, revised versions +of the GNU Free Documentation License from time to time. Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. See +@uref{https://www.gnu.org/licenses/}. + +Each version of the License is given a distinguishing version number. +If the Document specifies that a particular numbered version of this +License ``or any later version'' applies to it, you have the option of +following the terms and conditions either of that specified version or +of any later version that has been published (not as a draft) by the +Free Software Foundation. If the Document does not specify a version +number of this License, you may choose any version ever published (not +as a draft) by the Free Software Foundation. If the Document +specifies that a proxy can decide which future versions of this +License can be used, that proxy's public statement of acceptance of a +version permanently authorizes you to choose that version for the +Document. + +@item +RELICENSING + +``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any +World Wide Web server that publishes copyrightable works and also +provides prominent facilities for anybody to edit those works. A +public wiki that anybody can edit is an example of such a server. A +``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the +site means any set of copyrightable works thus published on the MMC +site. + +``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0 +license published by Creative Commons Corporation, a not-for-profit +corporation with a principal place of business in San Francisco, +California, as well as future copyleft versions of that license +published by that same organization. + +``Incorporate'' means to publish or republish a Document, in whole or +in part, as part of another Document. + +An MMC is ``eligible for relicensing'' if it is licensed under this +License, and if all works that were first published under this License +somewhere other than this MMC, and subsequently incorporated in whole +or in part into the MMC, (1) had no cover texts or invariant sections, +and (2) were thus incorporated prior to November 1, 2008. + +The operator of an MMC Site may republish an MMC contained in the site +under CC-BY-SA on the same site at any time before August 1, 2009, +provided the MMC is eligible for relicensing. + +@end enumerate + +@page +@heading ADDENDUM: How to use this License for your documents + +To use this License in a document you have written, include a copy of +the License in the document and put the following copyright and +license notices just after the title page: + +@smallexample +@group + Copyright (C) @var{year} @var{your name}. + Permission is granted to copy, distribute and/or modify this document + under the terms of the GNU Free Documentation License, Version 1.3 + or any later version published by the Free Software Foundation; + with no Invariant Sections, no Front-Cover Texts, and no Back-Cover + Texts. A copy of the license is included in the section entitled ``GNU + Free Documentation License''. +@end group +@end smallexample + +If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, +replace the ``with@dots{}Texts.''@: line with this: + +@smallexample +@group + with the Invariant Sections being @var{list their titles}, with + the Front-Cover Texts being @var{list}, and with the Back-Cover Texts + being @var{list}. +@end group +@end smallexample + +If you have Invariant Sections without Cover Texts, or some other +combination of the three, merge those two alternatives to suit the +situation. + +If your document contains nontrivial examples of program code, we +recommend releasing these examples in parallel under your choice of +free software license, such as the GNU General Public License, +to permit their use in free software. + +@c Local Variables: +@c ispell-local-pdict: "ispell-dict" +@c End: