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

@@ -1,18 +1,15 @@
 #+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.
+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]]
-Originally created so I would be able to quickly edit and easily read Org mode
+without worrying about Emacs lock-in.
-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.
 
 *Note*: this project is considered /feature complete/ by the author, so the
 addition of new features will be unlikely.
@@ -31,6 +28,14 @@ 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.
 
@@ -39,14 +44,14 @@ usage information and configuration options.
 
 Different Vim colour schemes will result in different appearances.
 
-| [[https://github.com/romainl/Apprentice][Apprentice]] | [[https://github.com/axvr/photon.vim][Photon]] |
+| [[https://github.com/axvr/raider.vim][Raider]] | Unokai (built-in) |
 |--------+------------|
-| [[https://raw.githubusercontent.com/axvr/org.vim/images/apprentice.png]] | [[https://raw.githubusercontent.com/axvr/org.vim/images/photon.png]] |
+| [[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

@@ -1,12 +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"
-  - Hightlight concealed TeX the same as normal text
-  - Close inline block using same number of starting delimiters.
-  - Try to get text attributes to stack (e.g. underlined text in bold text)
-    - TeX math fragments in bold, italic, etc. text
-  - Set a max number of lines to search for end delimiter for bold/italic/etc. to 3 (might not be possible)
 
-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

@@ -16,7 +16,7 @@ Welcome to the org.vim user manual.            *org*  *org.vim*  *vim-org*  *out
 ==============================================================================
  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
@@ -37,6 +37,12 @@ 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
+<
 ==============================================================================
  3. CONFIGURATION                                           *org-configuration*
 
@@ -45,15 +51,10 @@ enable it manually.
 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|.
 
 ------------------------------------------------------------------------------
@@ -104,7 +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
 <
@@ -119,7 +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
 <
@@ -127,9 +128,55 @@ 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
+<
 ==============================================================================
  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!)
@@ -165,27 +212,28 @@ v1.0 [2019-09-28]~
 ==============================================================================
  5. 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].
-
 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="\(^\|[- '"({\]]\)\@<=\/\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
+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
@@ -31,16 +32,15 @@ endif
 
 highlight def orgBold term=bold cterm=bold gui=bold
 highlight def orgUnderline term=underline cterm=underline gui=underline
-highlight def link orgBoldDelimiter      orgBold
+highlight def orgStrikethrough term=strikethrough cterm=strikethrough gui=strikethrough
+highlight def link orgBoldDelimiter orgBold
 highlight def link orgUnderlineDelimiter orgUnderline
-
-highlight def link orgStrikethrough Ignore
 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
@@ -74,6 +74,8 @@ syntax match orgHeading4 /^\s*\*\{4}\s\+.*$/ keepend contains=@Spell,orgTag,orgT
 syntax match orgHeading5 /^\s*\*\{5}\s\+.*$/ 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']), ' ')
 
@@ -90,6 +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
 
@@ -107,29 +112,30 @@ 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
 highlight def link orgHyperLeft Comment
 highlight def link orgHyperRight Comment
 
+
 " TeX
-" Support for both inline and block based embedded latex
+"   Ref: https://orgmode.org/manual/LaTeX-fragments.html
-" eg: $Latex$ for inline or $$ LaTeX $$ for a block
+if org#option('org_highlight_tex', 1)
-" Note:
+    syntax include @LATEX syntax/tex.vim
-" - $LaTeX$ uses the tex.vim syntax for its conceal properties
+    syntax region orgMath start="\\begin\[.*\]{.*}"  end="\\end{.*}"         keepend contains=@LATEX
-" - Inspired by https://github.com/vim-pandoc/vim-pandoc-syntax
+    syntax region orgMath start="\\begin{.*}"        end="\\end{.*}"         keepend contains=@LATEX
-" - the conceal settings follows your g:tex_conceal setting for
+    syntax region orgMath start="\\\["               end="\\\]"              keepend contains=@LATEX
-"   more info run :h tex-conceal.
+    syntax region orgMath start="\\("                end="\\)"               keepend contains=@LATEX
-" Ref: https://orgmode.org/manual/LaTeX-fragments.html#LaTeX-fragments
+    syntax region orgMath start="\S\@<=\$\|\$\S\@="  end="\S\@<=\$\|\$\S\@=" keepend oneline contains=@LATEX
-syntax include @LATEX syntax/tex.vim
+    syntax region orgMath start=/\$\$/               end=/\$\$/              keepend contains=@LATEX
-syntax region orgMath     start="\\begin\[.*\]{.*}"  end="\\end{.*}"         keepend contains=@LATEX
+    syntax match  orgMath /\\\$/ conceal cchar=$
-syntax region orgMath     start="\\begin{.*}"        end="\\end{.*}"         keepend contains=@LATEX
+    highlight def link orgMath String
-syntax region orgMath     start="\\\["               end="\\\]"              keepend contains=@LATEX
+endif
-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=$
-hi def link orgMath     String
 
 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'