Remove .gitattributes file

Originally-authored-on: 2020-10-26

.gitattributes

@@ -1,5 +0,0 @@
-# See: https://axvr.io/projects/ascribe/
-*       text=auto eol=lf final-newline
-*.vim   line-length=78 expand-tab tab-stop=4
-doc/*   line-length=78 expand-tab tab-stop=4
-*.org   line-length=80 expand-tab tab-stop=4

.gitignore

@@ -0,0 +1,2 @@
+samples/
+/doc/tags

README.org

@@ -1,25 +1,57 @@
 #+TITLE: Org mode and Outline mode syntax highlighting for Vim
 
-Org.vim is a very minimal [[https://orgmode.org][Org mode]] and
+Org.vim is a minimal [[https://orgmode.org][Org mode]] and
 [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Outline-Mode.html][Outline mode]]
 plugin for [[https://www.vim.org][Vim]] providing only syntax highlighting and
 folding.
 
 This plugin aims to replicate Vim's [[https://github.com/tpope/vim-markdown/][existing Markdown]]
 editing experience on Org mode (and Outline mode) files, rather than trying to
-be a full featured Org mode plugin—that is what Emacs is for.
-
-Originally created so I would be able to quickly edit and easily read Org mode
-files in Vim without any of /the bells and whistles/ of the original Emacs
-implementation.  It also allowed me use [[https://github.com/orgzly/orgzly-android/][Orgzly]]
-(highly recommended) without worrying about Emacs lock-in.
+be a full featured Org mode plugin—that is what Emacs is for.  Originally
+created so I could use [[https://github.com/orgzly/orgzly-android/][Orgzly]]
+without worrying about Emacs lock-in.
 
 *Note*: this project is considered /feature complete/ by the author, so the
 addition of new features will be unlikely.
 
+
+** Installation
+
+Installation of Org.vim can be performed by using your preferred plugin/package
+management tool(s).  If you don't have a Vim package manager I recommend using
+Vim 8 packages.
+
+Just run these 2 commands from your shell.
+
+#+BEGIN_SRC sh
+git clone https://github.com/axvr/org.vim ~/.vim/pack/plugins/start/org
+vim +'helptags ~/.vim/pack/plugins/start/org/doc/' +q
+#+END_SRC
+
+Make sure the following options are set in your vimrc to enable all
+functionality:
+
+#+BEGIN_SRC vim
+syntax enable
+filetype plugin indent on
+#+END_SRC
+
+Once installed check out the Org.vim manual (run ~:help org.txt~ to open it) for
+usage information and configuration options.
+
+
+** Screenshots
+
+Different Vim colour schemes will result in different appearances.
+
+| [[https://github.com/axvr/raider.vim][Raider]] | Unokai (built-in) |
+|--------+------------|
+| [[https://raw.githubusercontent.com/axvr/org.vim/images/raider.png]] | [[https://raw.githubusercontent.com/axvr/org.vim/images/unokai.png]] |
+
+
 ** Licence
 
-Copyright (c) 2018–2020, Alex Vear.
+Copyright © 2018–2021, Alex Vear.
 
 Org.vim is distributed under the same terms as Vim itself.
 

TODO

@@ -1,7 +1,12 @@
-MAYBE:
+* Future
   - Syntax highlight checkboxes and checkbox cookies
   - Separate syntax group for heading delimiters
-  - Syntax highlight and indent properties
+  - Syntax highlight and indent "properties"
 
-UNLIKELY:
+* Maybe
   - Implement Emacs's abbreviations (e.g. '\<s<TAB>')
+
+* Impossible?
+  - Try to get text attributes to stack (e.g. underlined text in bold text)
+  - Close inline block using same number of starting delimiters.
+  - Set a max number of lines to search for end delimiter for bold/italic/etc. to 3 (might not be possible)

autoload/org.vim

@@ -1,6 +1,6 @@
 " Helper functions for org.vim
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
 " Location:     autoload/org.vim
 " Website:      https://github.com/axvr/org.vim

doc/org.txt

@@ -7,17 +7,16 @@
 Welcome to the org.vim user manual.            *org*  *org.vim*  *vim-org*  *outline*
 
     1. Introduction ............................... |org-intro|
-    2. Installation ............................... |org-install|
-    3. Basic syntax ............................... |org-syntax|
-    4. Configuration .............................. |org-configuration|
-    5. Change log ................................. |org-changelog|
-    6. Legal ...................................... |org-legal|
-    7. References ................................. |org-references|
+    2. Usage ...................................... |org-usage|
+    3. Configuration .............................. |org-configuration|
+    4. Change log ................................. |org-changelog|
+    5. Legal ...................................... |org-legal|
+    6. References ................................. |org-references|
 
 ==============================================================================
  1. INTRODUCTION                                                    *org-intro*
 
-Org.vim is a very minimal Org mode [2] and Outline mode [1] plugin for Vim
+Org.vim is a minimal Org mode [2] and Outline mode [1] plugin for Vim
 providing only syntax highlighting and folding.
 
 This plugin aims to replicate Vim's existing Markdown editing experience on
@@ -25,102 +24,37 @@ Org mode (and Outline mode) files, rather than trying to be a full featured
 Org mode plugin -- that is what Emacs is for.
 
 ==============================================================================
- 2. INSTALLATION                                                  *org-install*
-
-Installation of Org.vim can be performed by using your favourite Vim
-plugin/package management tool(s).
-
-==============================================================================
- 3. BASIC SYNTAX                                                   *org-syntax*
-
-Outline mode isn't used much anymore, one place it is still used is for GNU
-Emacs release notes.  It contains only a single piece of syntax: heading
-levels denoted by asterisks.
->
-    * This is a heading
-
-    The first heading is equivalent to <h1> tags in HTML files.
-
-    ** This is a sub-heading
-
-    This heading uses 2 asterisks to denote that it is a below the previous
-    heading.
-
-    *** This is a sub-sub-heading
-
-    * This is another top level heading
-
-    Org.vim supports as many heading levels as you want, and each of these
-    headings can use Vim's folding keys and fold navigation.
-<
-Org mode is a huge superset of Outline mode.  It uses the same heading syntax
-mentioned above, but supports many, many more features.  Org.vim supports the
-core subset of Org mode syntax, which should be suitable for most use cases.
-
-The following is a short overview of essential Org mode syntax.
->
-    Org mode supports *bold*, /italic/, _underline_ and +strikethrough+ text
-    which is delimited by asterisks, forward-slashes, underscores, and pluses
-    respectively.
-
-    Paragraphs are separated by empty lines.
-
-    ~monospaced~ and =verbatim= text are delimited by equals signs and tilde
-    respectively.
-
-    : Entire lines can be marked as verbatim by prepending with a colon.
-
-    # Comments are lines prepended with a hash.
-
-    This is a link to the Org.vim repository [[https://github.com/axvr/org.vim]]
-
-    This is also a link to the [[https://github.com/axvr/org.vim][Org.vim repository]]
-    where the text "Org.vim repository" is the title of the link (link text).
-
-    - This is an item in a list.
-    - This is another item in the same list.
-      - This is a sub-item for the above list item.
-        - This is a sub-item for the previous list item.
-    + List items can also be denoted by using a plus sign
-    1. Or by numbering each item.
-    2. Like so.
-      - [ ] List items can also have checkboxes by using open and closing
-            square brackets.
-      - [X] By placing an uppercase X in between the square brackets you can
-            mark the item as "done".
-<
-Org.vim supports a lot more of Org mode's vast syntax than was mentioned here.
-You can learn much more of Org mode's syntax online.
+ 2. USAGE                                                           *org-usage*
 
 When Org.vim is installed, files ending with the extension `.org` will
-automatically have syntax highlighting and folding support enabled.  It can
-also be manually enabled with the following command.
+automatically have syntax highlighting and folding support enabled.  You can
+also manually enable it by setting the 'filetype' option.
 >
     :set filetype=org
 <
 Outline mode doesn't have a file extension like Org mode so you will have to
-enable it manually.  This is simply done by opening the file and runing the
-following command.
+enable it manually.
 >
     :set filetype=outline
 <
+Just make sure the following options are set in your vimrc to enable all
+functionality offered by this plugin:
+>
+    syntax enable
+    filetype plugin indent on
+<
 ==============================================================================
- 4. CONFIGURATION                                           *org-configuration*
+ 3. CONFIGURATION                                           *org-configuration*
 
                                                                   *org-folding*
 
 To control how Org.vim handles folding, just use the standard Vim |folding|
 options and commands.
 
-For example if you want to enable or disable folding, use 'foldenable'.
+For example, if you want to enable or disable folding, just set 'foldenable'.
 >
     autocmd FileType org,outline setlocal nofoldenable
 <
-Or if you want folding enabled and all folds opened by default, use
-'foldlevelstart'.
->
-    autocmd FileType org,outline setlocal foldenable foldlevelstart=99
-<
 For more information on folding in Vim, refer to |fold.txt|.
 
 ------------------------------------------------------------------------------
@@ -171,7 +105,7 @@ This option can be enabled for all buffers like so:
 >
     let g:org_clean_folds = 1
 <
-Alternatively it can be enabled for specific buffers:
+Alternatively, it can be enabled for specific buffers:
 >
     let b:org_clean_folds = 1
 <
@@ -186,7 +120,7 @@ the italic variant of your font.
 As some terminals, terminal multiplexers and monospaced fonts don't support
 the use of italics, org.vim provides a mechanism to disable italic text.
 
-To disable for all Org mode files place the following line in your vimrc:
+To disable for all Org mode files, place the following line in your vimrc:
 >
     let g:org_use_italics = 0
 <
@@ -194,8 +128,63 @@ To disable italics only in a single buffer, use this instead:
 >
     let b:org_use_italics = 0
 <
+------------------------------------------------------------------------------
+                                 *'b:org_highlight_tex'*  *'g:org_highlight_tex'*
+Value: numeric~
+Default: 1~
+
+Enable/disable syntax highlighting of inline (La)TeX blocks[4].  This option
+exists as some Org mode users don't use TeX and may find the highlighting
+annoying.
+
+To disable for all Org mode files, place the following line in your vimrc:
+>
+    let g:org_highlight_tex = 0
+<
+To disable only in a single buffer, use this instead:
+>
+    let b:org_highlight_tex = 0
+<
+------------------------------------------------------------------------------
+          *'b:org_list_alphabetical_bullets'* *'g:org_list_alphabetical_bullets'*
+Value: numeric~
+Default: 0~
+
+Enable/disable alphabetical bullets on ordered lists.  This is disabled by
+default like in Emacs.
+
+To enable for all Org mode files, place the following line in your vimrc:
+>
+    let g:org_list_alphabetical_bullets = 1
+<
+To enable only in a single buffer, use this instead:
+>
+    let b:org_list_alphabetical_bullets = 1
+<
 ==============================================================================
- 5. CHANGE LOG                                                  *org-changelog*
+ 4. CHANGE LOG                                                  *org-changelog*
+
+v1.5 [2021-03-11]~
+
+  * Added support for alphabetical ordered list bullets.  (Thanks Isti115!)
+  * Option to disable (La)TeX highlighting.  (See: |g:org_highlight_tex|)
+  * Doc update.
+
+v1.4 [2020-08-24]~
+
+  * Render "strikethrough" text as "struck through".
+  * Added syntax cluster groups for headings and hyperlinks.
+  * Made spacing consistent throughout syntax files.
+  * Minor wording tweaks to README.
+
+v1.3 [2020-05-02]~
+
+  * Added syntax highlighting of LaTeX math fragments.  (Thanks Gavinok!)
+  * Improved detection of inline bold, italic, underline, strike through,
+    verbatim and code syntax.
+  * Grey out "strike through" text by default.
+  * Updated README content and added screenshots.
+  * Removed the "basic Org mode syntax" section from this document.
 
 v1.2 [2020-02-15]~
 
@@ -221,29 +210,30 @@ v1.0 [2019-09-28]~
   * Initial stable release.
 
 ==============================================================================
- 6. LEGAL                                                           *org-legal*
-
-Org.vim is based on the work of many other people (far too many to list here),
-without them org.vim would not have been possible.  The most notable of thse
-works are:
-
-  * GNU Emacs' Outline mode [1].
-  * Carsten Dominik's Org mode [2].
+ 5. LEGAL                                                           *org-legal*
 
 Org.vim is distributed under the same terms as Vim itself.
 
-Copyright (c) 2018–2020, Alex Vear.
+Copyright (c) 2018–2021, Alex Vear.
 
 A copy of the full licence text should have been provided with this extension
 in the `LICENCE` file.  The license can also be viewed on the web [3] or by
 viewing the |license| section of the |uganda.txt| help doc from within Vim.
 
+Org.vim is based on the work of many other people (far too many to list here),
+without them org.vim would not have been possible.  The most notable of these
+works are:
+
+  * GNU Emacs' Outline mode [1].
+  * Carsten Dominik's Org mode [2].
+
 ==============================================================================
  7. REFERENCES                                                 *org-references*
 
 [1]: <https://www.gnu.org/software/emacs/manual/html_node/emacs/Outline-Mode.html>
 [2]: <https://orgmode.org/>
 [3]: <http://vimdoc.sourceforge.net/htmldoc/uganda.html#license>
+[4]: <https://orgmode.org/manual/LaTeX-fragments.html>
 
 ------------------------------------------------------------------------------
 vim:et:ts=4:sts=4:sw=4:tw=78:ft=help:norl:

ftdetect/org.vim

@@ -1,8 +1,8 @@
 " Vim filetype detect plugin for GNU Emacs' Org mode
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
-" Location:     ftplugin/org.vim
+" Location:     ftdetect/org.vim
 " Website:      https://github.com/axvr/org.vim
 " Last Change:  2019-09-22
 "

ftplugin/org.vim

@@ -1,10 +1,10 @@
 " Vim filetype plugin for GNU Emacs' Org mode
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
 " Location:     ftplugin/org.vim
 " Website:      https://github.com/axvr/org.vim
-" Last Change:  2020-01-04
+" Last Change:  2020-02-15
 "
 " Reference Specification: Org mode manual
 "   GNU Info: `$ info Org`

ftplugin/outline.vim

@@ -1,6 +1,6 @@
 " Vim filetype plugin for GNU Emacs' Outline mode
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
 " Location:     ftplugin/outline.vim
 " Website:      https://github.com/axvr/org.vim

samples/links.org

@@ -0,0 +1,5 @@
+[[https://google.com]]
+
+[[https://google.com][Google]]
+
+Hello [[world]] foo.

samples/sample1.org

@@ -0,0 +1,52 @@
+#+TITLE: Org-mode sample 1
+
+This is some sample text showing off the org-mode syntax for *bold*, /italic/,
+_underlined_ and +strike-through+ text.
+
+Org-mode also has support for single line and block comments.
+
+# This is a single-line comment; denoted by the # at the beginning of the line.
+
+#+BEGIN_COMMENT
+This is a block comment, which is denoted through th use of the delimiters
+found above and below.
+#+END_COMMENT
+
+_this is underline text
+this is more_
+
+~verbatim~
+
+: verbatim
+
+asasdf ** __
+_hello world_ something __ _hello_
+
+_hello world_ _ _ __
+
+=monospace=
+
+#+BEGIN_SRC file-type
+this is a code block
+#+END_SRC
+
+#+BEGIN_EXAMPLE
+some example text
+#+END_EXAMPLE
+
+#+SOME_OPTION: This is an org-mode option
+
+Active date:
+<2019-03-02 23:44>
+Inactive date:
+[2019-03-02 23:44]
+
+[[https://google.com]]
+[[https://google.com][Google]]
+
+* Heading 1
+** Heading 2
+*** Heading 3 :tag:
+**** TODO DONE NEXT DOING Heading 4
+
+# vim: set spell :

samples/sample2.org

@@ -0,0 +1,83 @@
+#+TITLE: Hello world
+
+[[hello world][something]] <-- this is a link
+
+*bold*
+
+/italic/
+
++strikethrough+
+
+_underline_
+
+/aasdf *sdfasdf* sadfasdf/
+
+#+BEGIN_COMMENT
+hello world this is a comment block
+#+END_COMMENT
+
+# comment
+
+1. Foo bar bz baz this is a /not so/ very long line of text in this vim 8.2
+   buffer.
+2. Hello world.
+   1. Foo
+   2. Bar
+
+- foo
+- bar
+
+- This is *foo*
+  - A nested listsdf
++ Using different asdfasd
+  + delimiters /fee/
+
++ Foo bar bz baz this is a /not so/ very long line of text in this vim 8.2 buffer.
+
++ [ ] This is a checkbox.
+  + [ ] Nested checkbox.
+  + [X] This is a checked checkbox with really long text to test how wrapping
+    works.
+  + [ ] Something asdf asdf asdf adfs dsf asdf sadf sadf sadf saf sdf asdf sdf
+    asdf sadf
+
+# * foo not a list item
+#   * Is a list item
+
+
+| Table | Column 1 |
+|-------+----------|
+| item  | _foo_ bar  |
+
+<2003-09-16 Tue 12:00>--<2003-09-16 Tue 12:00>
+<2003-09-16 Tue>--<2003-09-16 Tue>
+[2003-09-16 Tue]
+[2003-09-16 Tue 12:00]--[2003-09-16 Tue 12:00]
+<2003-09-16 Tue>
+<2003-09-16 Sáb>
+<2003-09-16 Tue 12:00-12:30>
+
+#+asdasdsdfasdf: asdfasd
+
+~verbatim~
+: verbatim
+
+=monospace=
+
+#+BEGIN_SRC
+asdfasdfasdf
+#+END_SRC
+
+* Hello world
+** Foo bar
+*** Something :something_else:
+
+******** asdfasdf
+
+hello world
+
+
+
+**** Hello world
+
+something

samples/sample3.org

@@ -0,0 +1,45 @@
+#+TITLE: This is a title
+#+Author: Foo bar
+
+* Heading 1
+
+This is *bold* text.
+This is /italic/ text.
+This is _underlined_ text.
+This is +strikethrough+ text.
+This is ~monospace~ text.
+This is =verbatim= text.
+
+Link to [[https://www.orgmode.org][Org mode]] website.
+
+Get Org.vim from here: [[https://github.com/axvr/org.vim]]
+
+# Comment
+
+: Verbatim
+
+#+BEGIN_SRC lisp
+(if (> 1 2)
+  (print "True")
+  (print "False"))
+#+END_SRC
+
+#+BEGIN_COMMENT
+This is a comment block.
+#+END_COMMENT
+
+- Foo.
+- Bar.
+  + Biz.
+    1. Hello.
+    2. World.
+  + Baz.
+   1) Org,
+   2) Mode.
+
+Time stamps:  [2020-03-01]  <2020-02-29>
+
+** TODO Heading 2
+*** Heading 3 :heading:tags:
+**** Heading 4
+and so on...

samples/tex.org

@@ -0,0 +1,36 @@
+#+TITLE: Experiment with TeX in Org mode
+#+OPTIONS: tex:t
+
+Hello $\alpha$.
+
+$$\alpha$$
+
+* Foo $\alpha$
+
+*foo $\alpha$ bar*
+
+\neg
+
+a  \begin{equation}                        % arbitrary environments,
+   x=\sqrt{b}                              % even tables, figures
+   \end{equation}                          % etc
+
+  \begin{equation}                        % arbitrary environments,
+  x=\sqrt{b}                              % even tables, figures
+  \end{equation}                          % etc
+
+\begin{equation}                        % arbitrary environments,
+x=\sqrt{b}                              % even tables, figures
+\end{equation}                          % etc
+
+\begin[asdf]{equation2}                 % arbitrary environments,
+x=\sqrt{b}                              % even tables, figures
+\end{equation2}                         % etc
+
+If $a^2=b$ and \( b=2 \), then the solution must be
+either $$ a=+\sqrt{2} $$ or \[ a=-\sqrt{2} \].
+
+$$
+
+a+=\alpha
+$$

samples/unusual.org

@@ -0,0 +1,46 @@
+Hello /world/ foo/bar/asdf biz/baz//buz/
+
+~foo~
+
+*hello*
+/_asdf/
+a/foo/
+-/foo/
+#/foo/
+@/foo/
+:/foo/
+_/foo/_
++/foo/+
+3/foo/
+£/foo/
+;/foo/
+,/foo/
+./foo/
+*hello*
+
+/asdföasdf/
+/öasdf/
+
+hello /foo
+bar/
+
+*Foo. Bar.*
+
+Biz
+
+
+Org mode will match unconditionally from first =*= (must be preceded by [- '"(] ) to first one with [ \n\r-'")[}] on the right side.
+
+
+*Hello
+asdf world*
+
+Hello 123468-qwertyuiop[]\aasdfgghjjk;/.,mzxcg!@#$%^&*(*Foo=\\\\]][][[[*asdf]* [asdf*
+
+Bar
+
+*Helloa sdf world
+asdf ** dasf
+Hello 123468-qwertyuiop[]\aasdfgghjjk;'"/.,mzxcg!@#$%^&*(*Foo=\\\\]][ _asd_ [[*asdf]"**[a*sdf*/
+
+Bar

syntax/org.vim

@@ -1,10 +1,10 @@
 " Vim syntax file for GNU Emacs' Org mode
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
 " Location:     syntax/org.vim
 " Website:      https://github.com/axvr/org.vim
-" Last Change:  2020-01-05
+" Last Change:  2021-03-11
 "
 " Reference Specification: Org mode manual
 "   GNU Info: `$ info Org`
@@ -17,11 +17,12 @@ endif
 " Enable spell check for non syntax highlighted text
 syntax spell toplevel
 
+
 " Bold, underine, italic, etc.
-syntax region orgItalic        matchgroup=orgItalicDelimiter        start="[^ \t\k]\@<!\/\k\@=\/\@!" end="\k\@<=\/\@<!\/" keepend contains=@Spell
-syntax region orgBold          matchgroup=orgBoldDelimiter          start="[^ \t\k]\@<!\*\k\@=\*\@!" end="\k\@<=\*\@<!\*" keepend contains=@Spell
-syntax region orgUnderline     matchgroup=orgUnderlineDelimiter     start="[^ \t\k]\@<!_\k\@=_\@!"   end="\k\@<=_\@<!_"   keepend contains=@Spell
-syntax region orgStrikethrough matchgroup=orgStrikethroughDelimiter start="[^ \t\k]\@<!+\k\@=+\@!"   end="\k\@<=+\@<!+"   keepend contains=@Spell
+syntax region orgItalic        matchgroup=orgItalicDelimiter        start="\(^\|[- '"({\]]\)\@<=\/\ze[^ ]" end="^\@!\/\([^\k\/]\|$\)\@=" keepend contains=@Spell
+syntax region orgBold          matchgroup=orgBoldDelimiter          start="\(^\|[- '"({\]]\)\@<=\*\ze[^ ]" end="^\@!\*\([^\k\*]\|$\)\@=" keepend contains=@Spell
+syntax region orgUnderline     matchgroup=orgUnderlineDelimiter     start="\(^\|[- '"({\]]\)\@<=_\ze[^ ]"  end="^\@!_\([^\k_]\|$\)\@="   keepend contains=@Spell
+syntax region orgStrikethrough matchgroup=orgStrikethroughDelimiter start="\(^\|[ '"({\]]\)\@<=+\ze[^ ]"   end="^\@!+\([^\k+]\|$\)\@="   keepend contains=@Spell
 
 if org#option('org_use_italics', 1)
     highlight def orgItalic term=italic cterm=italic gui=italic
@@ -31,22 +32,23 @@ endif
 
 highlight def orgBold term=bold cterm=bold gui=bold
 highlight def orgUnderline term=underline cterm=underline gui=underline
+highlight def orgStrikethrough term=strikethrough cterm=strikethrough gui=strikethrough
 highlight def link orgBoldDelimiter orgBold
 highlight def link orgUnderlineDelimiter orgUnderline
+highlight def link orgStrikethroughDelimiter orgStrikethrough
 
 
 " Options
 syntax match  orgOption /^\s*#+\w\+.*$/ keepend
 syntax region orgTitle matchgroup=orgOption start="\c^\s*#+TITLE:\s*" end="$" keepend oneline
-
 highlight def link orgBlockDelimiter SpecialComment
 highlight def link orgOption SpecialComment
 highlight def link orgTitle Title
 
 
 " Code and vervatim text
-syntax region orgCode     matchgroup=orgCodeDelimiter     start="[^ \t\k]\@<!\~\k\@=\~\@!" end="\k\@<=\~\@<!\~" keepend
-syntax region orgVerbatim matchgroup=orgVerbatimDelimiter start="[^ \t\k]\@<!=\k\@==\@!"   end="\k\@<==\@<!="   keepend
+syntax region orgCode     matchgroup=orgCodeDelimiter     start="\(^\|[- '"({\]]\)\@<=\~\ze[^ ]" end="^\@!\~\([^\k\~]\|$\)\@=" keepend
+syntax region orgVerbatim matchgroup=orgVerbatimDelimiter start="\(^\|[- '"({\]]\)\@<==\ze[^ ]"  end="^\@!=\([^\k=]\|$\)\@="   keepend
 syntax match  orgVerbatim /^\s*: .*$/ keepend
 syntax region orgVerbatim matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_.*"      end="\c^\s*#+END_.*"      keepend
 syntax region orgCode     matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_SRC"     end="\c^\s*#+END_SRC"     keepend
@@ -65,12 +67,14 @@ highlight def link orgComment Comment
 
 
 " Headings
-syntax match orgHeading1 /^\s*\*\{1}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
-syntax match orgHeading2 /^\s*\*\{2}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
-syntax match orgHeading3 /^\s*\*\{3}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
-syntax match orgHeading4 /^\s*\*\{4}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
-syntax match orgHeading5 /^\s*\*\{5}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
-syntax match orgHeading6 /^\s*\*\{6,}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo
+syntax match orgHeading1 /^\s*\*\{1}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+syntax match orgHeading2 /^\s*\*\{2}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+syntax match orgHeading3 /^\s*\*\{3}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+syntax match orgHeading4 /^\s*\*\{4}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+syntax match orgHeading5 /^\s*\*\{5}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+syntax match orgHeading6 /^\s*\*\{6,}\s\+.*$/ keepend contains=@Spell,orgTag,orgTodo,orgMath
+
+syntax cluster orgHeadingGroup contains=orgHeading1,orgHeading2,orgHeading3,orgHeading4,orgHeading5,orgHeading6
 
 syntax match orgTag /:\w\{-}:/ contained contains=orgTag
 exec 'syntax keyword orgTodo contained ' . join(org#option('org_state_keywords', ['TODO', 'NEXT', 'DONE']), ' ')
@@ -88,6 +92,9 @@ highlight def link orgTag Type
 " Lists
 syntax match orgUnorderedListMarker "^\s*[-+]\s\+" keepend contains=@Spell
 syntax match orgOrderedListMarker "^\s*\d\+[.)]\s\+" keepend contains=@Spell
+if org#option('org_list_alphabetical_bullets', 0)
+    syntax match orgOrderedListMarker "^\s*\a[.)]\s\+" keepend contains=@Spell
+endif
 highlight def link orgUnorderedListMarker Statement
 highlight def link orgOrderedListMarker orgUnorderedListMarker
 
@@ -105,6 +112,10 @@ syntax match orgHyperLeft /\[\{2}/ contained conceal
 syntax match orgHyperRight /\]\{2}/ contained conceal
 syntax match orgHyperURL /[^][]\{-1,}\]\[/ contains=orgHyperCentre contained conceal
 syntax match orgHyperCentre /\]\[/ contained conceal
+
+syntax cluster orgHyperlinkBracketsGroup contains=orgHyperLeft,orgHyperRight,orgHyperCentre
+syntax cluster orgHyperlinkGroup contains=orgHyperlink,orgHyperURL,orgHyperlinkBracketsGroup
+
 highlight def link orgHyperlink Underlined
 highlight def link orgHyperURL String
 highlight def link orgHyperCentre Comment
@@ -112,4 +123,19 @@ highlight def link orgHyperLeft Comment
 highlight def link orgHyperRight Comment
 
 
+" TeX
+"   Ref: https://orgmode.org/manual/LaTeX-fragments.html
+if org#option('org_highlight_tex', 1)
+    syntax include @LATEX syntax/tex.vim
+    syntax region orgMath start="\\begin\[.*\]{.*}"  end="\\end{.*}"         keepend contains=@LATEX
+    syntax region orgMath start="\\begin{.*}"        end="\\end{.*}"         keepend contains=@LATEX
+    syntax region orgMath start="\\\["               end="\\\]"              keepend contains=@LATEX
+    syntax region orgMath start="\\("                end="\\)"               keepend contains=@LATEX
+    syntax region orgMath start="\S\@<=\$\|\$\S\@="  end="\S\@<=\$\|\$\S\@=" keepend oneline contains=@LATEX
+    syntax region orgMath start=/\$\$/               end=/\$\$/              keepend contains=@LATEX
+    syntax match  orgMath /\\\$/ conceal cchar=$
+    highlight def link orgMath String
+endif
+
+
 let b:current_syntax = 'org'

syntax/outline.vim

@@ -1,10 +1,10 @@
 " Vim syntax file for GNU Emacs' Outline mode
 "
-" Maintainer:   Alex Vear <av@axvr.io>
+" Maintainer:   Alex Vear <alex@vear.uk>
 " License:      Vim (see `:help license`)
 " Location:     syntax/outline.vim
 " Website:      https://github.com/axvr/org.vim
-" Last Change:  2019-09-28
+" Last Change:  2020-08-24
 "
 " Reference Specification: GNU Emacs Manual, section 'Outline Mode'
 "   GNU Info: `$ info Emacs Outline Mode`
@@ -17,6 +17,7 @@ endif
 " Enable spell check for non syntax highlighted text
 syntax spell toplevel
 
+
 " Headings
 syntax match outlineHeading1 /^\s*\*\{1}\s\+.*$/ keepend contains=@Spell
 syntax match outlineHeading2 /^\s*\*\{2}\s\+.*$/ keepend contains=@Spell
@@ -25,6 +26,8 @@ syntax match outlineHeading4 /^\s*\*\{4}\s\+.*$/ keepend contains=@Spell
 syntax match outlineHeading5 /^\s*\*\{5}\s\+.*$/ keepend contains=@Spell
 syntax match outlineHeading6 /^\s*\*\{6,}\s\+.*$/ keepend contains=@Spell
 
+syntax cluster outlineHeadingGroup contains=outlineHeading1,outlineHeading2,outlineHeading3,outlineHeading4,outlineHeading5,outlineHeading6
+
 hi def link outlineHeading1 Title
 hi def link outlineHeading2 outlineHeading1
 hi def link outlineHeading3 outlineHeading2
@@ -32,4 +35,5 @@ hi def link outlineHeading4 outlineHeading3
 hi def link outlineHeading5 outlineHeading4
 hi def link outlineHeading6 outlineHeading5
 
+
 let b:current_syntax = 'outline'