Merge pull request #392 from anowlcalledjosh/yaml-frontmatter-fix

[etc/vim.git] / doc / vim-markdown.txt

*vim-markdown*  Vim Markdown

===============================================================================
Contents ~

 1. Introduction                                    |vim-markdown-introduction|
 2. Installation                                    |vim-markdown-installation|
 3. Basic usage                                      |vim-markdown-basic-usage|
  1. Folding                                             |vim-markdown-folding|
  2. Concealing                                       |vim-markdown-concealing|
 4. Options                                              |vim-markdown-options|
  1. Disable Folding                             |vim-markdown-disable-folding|
  2. Change fold style                         |vim-markdown-change-fold-style|
  3. Set header folding level           |vim-markdown-set-header-folding-level|
  4. Disable Default Key Mappings   |vim-markdown-disable-default-key-mappings|
  5. Enable TOC window auto-fit       |vim-markdown-enable-toc-window-auto-fit|
  6. Text emphasis restriction to single-lines
                       |vim-markdown-text-emphasis-restriction-to-single-lines|
  7. Syntax Concealing                         |vim-markdown-syntax-concealing|
  8. Fenced code block languages     |vim-markdown-fenced-code-block-languages|
  9. Follow named anchors                   |vim-markdown-follow-named-anchors|
  10. Syntax extensions                        |vim-markdown-syntax-extensions|
   1. LaTeX math                                      |vim-markdown-latex-math|
   2. YAML Front Matter                        |vim-markdown-yaml-front-matter|
   3. TOML Front Matter                        |vim-markdown-toml-front-matter|
   4. JSON Front Matter                        |vim-markdown-json-front-matter|
  11. Adjust new list item indent    |vim-markdown-adjust-new-list-item-indent|
  12. Do not require .md extensions for Markdown links
                |vim-markdown-do-not-require-.md-extensions-for-markdown-links|
  13. Auto-write when following link
                                  |vim-markdown-auto-write-when-following-link|
  14. Change default file extension
                                   |vim-markdown-change-default-file-extension|
  15. Do not automatically insert bulletpoints
                        |vim-markdown-do-not-automatically-insert-bulletpoints|
  16. Change how to open new files  |vim-markdown-change-how-to-open-new-files|
 5. Mappings                                            |vim-markdown-mappings|
 6. Commands                                            |vim-markdown-commands|
 7. Credits                                              |vim-markdown-credits|
 8. License                                              |vim-markdown-license|
 9. References                                        |vim-markdown-references|

===============================================================================
                                                    *vim-markdown-introduction*
Introduction ~

Syntax highlighting, matching rules and mappings for the original Markdown [1]
and extensions.

===============================================================================
                                                    *vim-markdown-installation*
Installation ~

If you use Vundle [2], add the following line to your '~/.vimrc':
>
  Plugin 'godlygeek/tabular'
  Plugin 'plasticboy/vim-markdown'
<
The 'tabular' plugin must come _before_ 'vim-markdown'.

Then run inside Vim:
>
  :so ~/.vimrc
  :PluginInstall
<
If you use Pathogen [3], do this:
>
  cd ~/.vim/bundle
  git clone https://github.com/plasticboy/vim-markdown.git
<
To install without Pathogen using the Debian vim-addon-manager [4], do this:
>
  git clone https://github.com/plasticboy/vim-markdown.git
  cd vim-markdown
  sudo make install
  vim-addon-manager install markdown
<
If you are not using any package manager, download the tarball [5] and do this:
>
  cd ~/.vim
  tar --strip=1 -zxf vim-markdown-master.tar.gz
<
===============================================================================
                                                     *vim-markdown-basic-usage*
Basic usage ~

-------------------------------------------------------------------------------
                                                         *vim-markdown-folding*
Folding ~

Folding is enabled for headers by default.

The following commands are useful to open and close folds:

                                                              *vim-markdown-zr*
- 'zr': reduces fold level throughout the buffer
                                                              *vim-markdown-zR*
- 'zR': opens all folds
                                                              *vim-markdown-zm*
- 'zm': increases fold level throughout the buffer
                                                              *vim-markdown-zM*
- 'zM': folds everything all the way
                                                              *vim-markdown-za*
- 'za': open a fold your cursor is on
                                                              *vim-markdown-zA*
- 'zA': open a fold your cursor is on recursively
                                                              *vim-markdown-zc*
- 'zc': close a fold your cursor is on
                                                              *vim-markdown-zC*
- 'zC': close a fold your cursor is on recursively

Options are available to disable folding or change folding style.

Try ':help fold-expr' and ':help fold-commands' for details.

-------------------------------------------------------------------------------
                                                      *vim-markdown-concealing*
Concealing ~

Concealing is set for some syntax such as bold, italic, code block and link.

Concealing lets you conceal text with other text. The actual source text is not
modified. If you put your cursor on the concealed line, the conceal goes away.

Options are available to disable or change concealing.

Try ':help concealcursor' and ':help conceallevel' for details.

===============================================================================
                                                         *vim-markdown-options*
Options ~

-------------------------------------------------------------------------------
                                                 *vim-markdown-disable-folding*
Disable Folding ~

Add the following line to your '.vimrc' to disable the folding configuration:
>
  let g:vim_markdown_folding_disabled = 1
<
This option only controls Vim Markdown specific folding configuration.

To enable/disable folding use Vim's standard folding configuration.
>
  set [no]foldenable
<
-------------------------------------------------------------------------------
                                               *vim-markdown-change-fold-style*
Change fold style ~

To fold in a style like python-mode [6], add the following to your '.vimrc':
>
  let g:vim_markdown_folding_style_pythonic = 1
<
Level 1 heading which is served as a document title is not folded.
'g:vim_markdown_folding_level' setting is not active with this fold style.

To prevent foldtext from being set add the following to your '.vimrc':
>
  let g:vim_markdown_override_foldtext = 0
<
-------------------------------------------------------------------------------
                                        *vim-markdown-set-header-folding-level*
Set header folding level ~

Folding level is a number between 1 and 6. By default, if not specified, it is
set to 1.
>
  let g:vim_markdown_folding_level = 6
<
Tip: it can be changed on the fly with:
>
  :let g:vim_markdown_folding_level = 1
  :edit
<
-------------------------------------------------------------------------------
                                    *vim-markdown-disable-default-key-mappings*
Disable Default Key Mappings ~

Add the following line to your '.vimrc' to disable default key mappings:
>
  let g:vim_markdown_no_default_key_mappings = 1
<
You can also map them by yourself with '<Plug>' mappings.

-------------------------------------------------------------------------------
                                      *vim-markdown-enable-toc-window-auto-fit*
Enable TOC window auto-fit ~

Allow for the TOC window to auto-fit when it's possible for it to shrink. It
never increases its default size (half screen), it only shrinks.
>
  let g:vim_markdown_toc_autofit = 1
<
-------------------------------------------------------------------------------
                       *vim-markdown-text-emphasis-restriction-to-single-lines*
Text emphasis restriction to single-lines ~

By default text emphasis works across multiple lines until a closing token is
found. However, it's possible to restrict text emphasis to a single line (i.e.,
for it to be applied a closing token must be found on the same line). To do so:
>
  let g:vim_markdown_emphasis_multiline = 0
<
-------------------------------------------------------------------------------
                                               *vim-markdown-syntax-concealing*
Syntax Concealing ~

Concealing is set for some syntax.

For example, conceal '[link text](link url)' as just 'link text'. Also,
'_italic_' and '*italic*' will conceal to just _italic_. Similarly '__bold__',
'**bold**', '___italic bold___', and '***italic bold***' will conceal to just
**bold**, **bold**, **_italic bold_**, and **_italic bold_** respectively.

To enable conceal use Vim's standard conceal configuration.
>
  set conceallevel=2
<
To disable conceal regardless of 'conceallevel' setting, add the following to
your '.vimrc':
>
  let g:vim_markdown_conceal = 0
<
To disable math conceal with LaTeX math syntax enabled, add the following to
your '.vimrc':
>
  let g:tex_conceal = ""
  let g:vim_markdown_math = 1
<
-------------------------------------------------------------------------------
                                     *vim-markdown-fenced-code-block-languages*
Fenced code block languages ~

You can use filetype name as fenced code block languages for syntax
highlighting. If you want to use different name from filetype, you can add it
in your '.vimrc' like so:
>
  let g:vim_markdown_fenced_languages = ['csharp=cs']
<
This will cause the following to be highlighted using the 'cs' filetype syntax.
>
  ```csharp
  ...
  ```
<
Default is "['c++=cpp', 'viml=vim', 'bash=sh', 'ini=dosini']".

-------------------------------------------------------------------------------
                                            *vim-markdown-follow-named-anchors*
Follow named anchors ~

This feature allows the 'ge' command to follow named anchors in links of the
form 'file#anchor' or just '#anchor', where file may omit the '.md' extension
as usual. Two variables control its operation:
>
  let g:vim_markdown_follow_anchor = 1
<
This tells vim-markdown whether to attempt to follow a named anchor in a link
or not. When it is 1, and only if a link can be split in two parts by the
pattern '#', then the first part is interpreted as the file and the second one
as the named anchor. This also includes urls of the form '#anchor', for which
the first part is considered empty, meaning that the target file is the current
one. After the file is opened, the anchor will be searched.

Default is '0'.
>
  let g:vim_markdown_anchorexpr = "'<<'.v:anchor.'>>'"
<
This expression will be evaluated substituting 'v:anchor' with a quoted string
that contains the anchor to visit. The result of the evaluation will become the
real anchor to search in the target file. This is useful in order to convert
anchors of the form, say, 'my-section-title' to searches of the form 'My
Section Title' or '<<my-section-title>>'.

Default is "''".

-------------------------------------------------------------------------------
                                               *vim-markdown-syntax-extensions*
Syntax extensions ~

The following options control which syntax extensions will be turned on. They
are off by default.

-------------------------------------------------------------------------------
                                                      *vim-markdown-latex-math*
LaTeX math ~

Used as '$x^2$', '$$x^2$$', escapable as '\$x\$' and '\$\$x\$\$'.
>
  let g:vim_markdown_math = 1
<
-------------------------------------------------------------------------------
                                               *vim-markdown-yaml-front-matter*
YAML Front Matter ~

Highlight YAML front matter as used by Jekyll or Hugo [7].
>
  let g:vim_markdown_frontmatter = 1
<
-------------------------------------------------------------------------------
                                               *vim-markdown-toml-front-matter*
TOML Front Matter ~

Highlight TOML front matter as used by Hugo [7].

TOML syntax highlight requires vim-toml [8].
>
  let g:vim_markdown_toml_frontmatter = 1
<
-------------------------------------------------------------------------------
                                               *vim-markdown-json-front-matter*
JSON Front Matter ~

Highlight JSON front matter as used by Hugo [7].

JSON syntax highlight requires vim-json [9].
>
  let g:vim_markdown_json_frontmatter = 1
<
-------------------------------------------------------------------------------
                                     *vim-markdown-adjust-new-list-item-indent*
Adjust new list item indent ~

You can adjust a new list indent. For example, you insert a single line like
below:
>
  * item1
<
Then if you type 'o' to insert new line in vim and type '* item2', the result
will be:
>
  * item1
      * item2
<
vim-markdown automatically insert the indent. By default, the number of spaces
of indent is 4. If you'd like to change the number as 2, just write:
>
  let g:vim_markdown_new_list_item_indent = 2
<
-------------------------------------------------------------------------------
                *vim-markdown-do-not-require-.md-extensions-for-markdown-links*
Do not require .md extensions for Markdown links ~

If you want to have a link like this '[link text](link-url)' and follow it for
editing in vim using the 'ge' command, but have it open the file "link-url.md"
instead of the file "link-url", then use this option:
>
  let g:vim_markdown_no_extensions_in_markdown = 1
<
This is super useful for GitLab and GitHub wiki repositories.

Normal behaviour would be that vim-markup required you to do this '[link text
](link-url.md)', but this is not how the Gitlab and GitHub wiki repositories
work. So this option adds some consistency between the two.

-------------------------------------------------------------------------------
                                  *vim-markdown-auto-write-when-following-link*
Auto-write when following link ~

If you follow a link like this '[link text](link-url)' using the 'ge' shortcut,
this option will automatically save any edits you made before moving you:
>
  let g:vim_markdown_autowrite = 1
<
-------------------------------------------------------------------------------
                                   *vim-markdown-change-default-file-extension*
Change default file extension ~

If you would like to use a file extension other than '.md' you may do so using
the 'vim_markdown_auto_extension_ext' variable:
>
  let g:vim_markdown_auto_extension_ext = 'txt'
<
-------------------------------------------------------------------------------
                        *vim-markdown-do-not-automatically-insert-bulletpoints*
Do not automatically insert bulletpoints ~

Automatically inserting bulletpoints can lead to problems when wrapping text
(see issue #232 for details), so it can be disabled:
>
  let g:vim_markdown_auto_insert_bullets = 0
<
In that case, you probably also want to set the new list item indent to 0 as
well, or you will have to remove an indent each time you add a new list item:
>
  let g:vim_markdown_new_list_item_indent = 0
<
-------------------------------------------------------------------------------
                                    *vim-markdown-change-how-to-open-new-files*
Change how to open new files ~

By default when following a link the target file will be opened in your current
buffer. This behavior can change if you prefer using splits or tabs by using
the 'vim_markdown_edit_url_in' variable. Possible values are 'tab', 'vsplit',
'hsplit', 'current' opening in a new tab, vertical split, horizontal split, and
current buffer respectively. Defaults to current buffer if not set:
>
  let g:vim_markdown_edit_url_in = 'tab'
<
===============================================================================
                                                        *vim-markdown-mappings*
Mappings ~

The following work on normal and visual modes:

                                                              *vim-markdown-gx*
- 'gx': open the link under the cursor in the same browser as the standard
  'gx' command. '<Plug>Markdown_OpenUrlUnderCursor'

  The standard 'gx' is extended by allowing you to put your cursor anywhere
  inside a link.

  For example, all the following cursor positions will work:
>
  [Example](http://example.com)
  ^  ^    ^^   ^       ^
  1  2    34   5       6

  <http://example.com>
  ^  ^               ^
  1  2               3
<
  Known limitation: does not work for links that span multiple lines.

                                                              *vim-markdown-ge*
- 'ge': open the link under the cursor in Vim for editing. Useful for
  relative markdown links. '<Plug>Markdown_EditUrlUnderCursor'

  The rules for the cursor position are the same as the 'gx' command.

                                                              *vim-markdown-]]*
- ']]': go to next header. '<Plug>Markdown_MoveToNextHeader'

                                                              *vim-markdown-[[*
- '[[': go to previous header. Contrast with ']c'.
  '<Plug>Markdown_MoveToPreviousHeader'

                                                              *vim-markdown-][*
- '][': go to next sibling header if any.
  '<Plug>Markdown_MoveToNextSiblingHeader'

                                                              *vim-markdown-[]*
- '[]': go to previous sibling header if any.
  '<Plug>Markdown_MoveToPreviousSiblingHeader'

                                                              *vim-markdown-]c*
- ']c': go to Current header. '<Plug>Markdown_MoveToCurHeader'

                                                              *vim-markdown-]u*
- ']u': go to parent header (Up). '<Plug>Markdown_MoveToParentHeader'

This plugin follows the recommended Vim plugin mapping interface, so to change
the map ']u' to 'asdf', add to your '.vimrc':
>
  map asdf <Plug>Markdown_MoveToParentHeader
<
To disable a map use:
>
  map <Plug> <Plug>Markdown_MoveToParentHeader
<
===============================================================================
                                                        *vim-markdown-commands*
Commands ~

The following requires ':filetype plugin on'.

                                                              *:HeaderDecrease*
- ':HeaderDecrease':

  Decrease level of all headers in buffer: 'h2' to 'h1', 'h3' to 'h2', etc.

  If range is given, only operate in the range.

  If an 'h1' would be decreased, abort.

  For simplicity of implementation, Setex headers are converted to Atx.

                                                              *:HeaderIncrease*
- ':HeaderIncrease': Analogous to ':HeaderDecrease', but increase levels
  instead.

                                                                  *:SetexToAtx*
- ':SetexToAtx':

  Convert all Setex style headers in buffer to Atx.

  If a range is given, e.g. hit ':' from visual mode, only operate on the
  range.

                                                                 *:TableFormat*
- ':TableFormat': Format the table under the cursor like this [10].

  Requires Tabular [11].

  The input table _must_ already have a separator line as the second line of
  the table. That line only needs to contain the correct pipes '|', nothing
  else is required.

                                                                         *:Toc*
- ':Toc': create a quickfix vertical window navigable table of contents with
  the headers.

  Hit '<Enter>' on a line to jump to the corresponding line of the markdown
  file.

                                                                        *:Toch*
- ':Toch': Same as ':Toc' but in an horizontal window.

                                                                        *:Toct*
- ':Toct': Same as ':Toc' but in a new tab.

                                                                        *:Tocv*
- ':Tocv': Same as ':Toc' for symmetry with ':Toch' and ':Tocv'.

===============================================================================
                                                         *vim-markdown-credits*
Credits ~

The main contributors of vim-markdown are:

- **Ben Williams** (A.K.A. **plasticboy**). The original developer of vim-
  markdown. Homepage [12].

If you feel that your name should be on this list, please make a pull request
listing your contributions.

===============================================================================
                                                         *vim-markdown-license*
License ~

The MIT License (MIT)

Copyright (c) 2012 Benjamin D. Williams

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

===============================================================================
                                                      *vim-markdown-references*
References ~

[1] http://daringfireball.net/projects/markdown/
[2] https://github.com/gmarik/vundle
[3] https://github.com/tpope/vim-pathogen
[4] http://packages.qa.debian.org/v/vim-addon-manager.html
[5] https://github.com/plasticboy/vim-markdown/archive/master.tar.gz
[6] https://github.com/klen/python-mode
[7] https://gohugo.io/content/front-matter/
[8] https://github.com/cespare/vim-toml
[9] https://github.com/elzr/vim-json
[10] http://www.cirosantilli.com/markdown-style-guide/#tables
[11] https://github.com/godlygeek/tabular
[12] http://plasticboy.com/

vim: ft=help