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Vim ❤️ Asciidoctor

image1

Intro

Vim has syntax highlighting for asciidoc out of the box. And it is/was really slow for me, probably because it tries to be very smart about syntax.

This plugin:

  • has different syntax highlighting;

  • is way faster (your vim lags less :) );

  • has folding;

  • has commands to compile documents (html, pdf, docx).

Installation

Vim8 built in packages

You can use git command on your command line:

git clone https://github.com/habamax/vim-asciidoctor.git ~/.vim/pack/my-packages/start/vim-asciidoctor

For windows users you should change ~/.vim to %USERPROFILE%/vimfiles

git clone https://github.com/habamax/vim-asciidoctor.git %USERPROFILE%/vimfiles/pack/my-packages/start/vim-asciidoctor

or minpac package manager (to add to your .vimrc):

call minpac#add('habamax/vim-asciidoctor')

vim-plug

Add to your .vimrc next to your other plugs
Plug 'habamax/vim-asciidoctor'

Setup

Note
To use basic asciidoctor with vim you don’t have to setup anything in vim. At least this was the intention. :)

The following is an example setup. Part of it might not work for you if you don’t have asciidoctor extensions installed. Or you don’t have custom PDF themes and fonts.

asciidoctor
" What to use for HTML, default `asciidoctor`.
let g:asciidoctor_executable = 'asciidoctor'

" What extensions to use for HTML, default `[]`.
let g:asciidoctor_extensions = ['asciidoctor-diagram', 'asciidoctor-rouge']

" Path to the custom css
let g:asciidoctor_css_path = '~/docs/AsciiDocThemes'

" Custom css name to use instead of built-in
let g:asciidoctor_css = 'haba-asciidoctor.css'
asciidoctor-pdf
" What to use for PDF, default `asciidoctor-pdf`.
let g:asciidoctor_pdf_executable = 'asciidoctor-pdf'

" What extensions to use for PDF, default `[]`.
let g:asciidoctor_pdf_extensions = ['asciidoctor-diagram']

" Path to PDF themes, default `''`.
let g:asciidoctor_pdf_themes_path = '~/docs/AsciiDocThemes'

" Path to PDF fonts, default `''`.
let g:asciidoctor_pdf_fonts_path = '~/docs/AsciiDocThemes/fonts'
asciidoctor-docx
" What to use for DOCX, default `pandoc`.
" The DOCX 'compilation' process is to generate `docbook` using
" `g:asciidoctor_executable` and then to generate DOCX out of `docbook`
" using `pandoc`.
let g:asciidoctor_pandoc_executable = 'pandoc'

"" --data-dir
let g:asciidoctor_pandoc_data_dir = '~/docs/.pandoc'

" Other parameters you want to feed pandoc
let g:asciidoctor_pandoc_other_params = '--toc'

" Reference document to reuse styles
" If not set up asciidoctor looks for the theme name
" :pdf-style: mytheme
" in the first 30 lines and generate reference-doc filename:
" g:asciidoctor_pandoc_data_dir + mytheme + '-reference.docx'
" for example: ~/docs/.pandoc/mytheme-reference.docx
let g:asciidoctor_pandoc_reference_doc = 'custom-reference.docx'
folding
" Fold sections, default `0`.
let g:asciidoctor_folding = 1

" Fold options, default `0`.
let g:asciidoctor_fold_options = 1
syntax
" Conceal *bold*, _italic_, `code` and urls in lists and paragraphs, default `0`.
" See limitations in end of the README
let g:asciidoctor_syntax_conceal = 1

" Highlight indented text, default `1`.
let g:asciidoctor_syntax_indented = 0
syntax highlighting for languages in [source] blocks
" List of filetypes to highlight, default `[]`
let g:asciidoctor_fenced_languages = ['python', 'c', 'javascript']
default mappings…​ there are no default mappings
" Function to create buffer local mappings and add default compiler
fun! AsciidoctorMappings()
    nnoremap <buffer> <leader>oo :AsciidoctorOpenRAW<CR>
    nnoremap <buffer> <leader>op :AsciidoctorOpenPDF<CR>
    nnoremap <buffer> <leader>oh :AsciidoctorOpenHTML<CR>
    nnoremap <buffer> <leader>ox :AsciidoctorOpenDOCX<CR>
    nnoremap <buffer> <leader>ch :Asciidoctor2HTML<CR>
    nnoremap <buffer> <leader>cp :Asciidoctor2PDF<CR>
    nnoremap <buffer> <leader>cx :Asciidoctor2DOCX<CR>
    nnoremap <buffer> <leader>p :AsciidoctorPasteImage<CR>
    " :make will build pdfs
    compiler asciidoctor2pdf
endfun

" Call AsciidoctorMappings for all `*.adoc` and `*.asciidoc` files
augroup asciidoctor
    au!
    au BufEnter *.adoc,*.asciidoc call AsciidoctorMappings()
augroup END

Commands

All commands are buffer local — available only for asciidoctor files (set filetype=asciidoctor)

  • Asciidoctor2HTML — convert current file to HTML.

  • Asciidoctor2PDF — convert current file to PDF.

  • Asciidoctor2DOCX — convert current file to DOCX.

  • AsciidoctorOpenRAW — open current file in a browser. Chrome and Firefox has extentsions to render barebone adoc files.

  • AsciidoctorOpenPDF — open PDF of the current file using default PDF viewer.

  • AsciidoctorOpenHTML — open HTML of the current file using default web browser.

  • AsciidoctorOpenDOCX — open DOCX of the current file using default DOCX viewer. (I haven’t tried it with LibreOffice or whatever else there might be. Also haven’t tried it on linux and OSX…​)

Note

Commands: Asciidoctor2HTML, Asciidoctor2PDF should convert files if asciidoctor and asciidoctor-pdf are installed.

Command Asciidoctor2DOCX should also have pandoc installed.

Usage

  1. Open ~/test.adoc

  2. Enter:

    = Asciidoctor Title: Hanging around
    
    This is the first para and it will be rendered with bigger text.
    
    == Section 1
    
    Text of section 1
    
    == Section 2
    
    Text of section 2
  3. Save it and export to HTML

    :w<CR>
    :Asciidoctor2HTML<CR>
  4. Open the HTML file:

    :AsciidoctorOpenHTML<CR>

HTML output

That should look something like this:

test html
Figure 1. HTML output

DOCX output

If you use :Asciidoctor2DOCX and :AsciidoctorOpenDOCX commands instead, you should see something like this (provided you have pandoc and MSWord installed:)

test docx
Figure 2. DOCX output

PDF output

And if you use :Asciidoctor2PDF and :AsciidoctorOpenPDF commands, you should see something like this (I have my own default theme and fonts, so you probably see it a bit different) :

test pdf1
Figure 3. PDF title page output
test pdf2
Figure 4. PDF first page output

Paste images from clipboard

Vim can’t access graphical part of clipboard thus an external tool should be used to save clipboard image to a png file.

  • For Windows I use GraphicsMagic (could be installed using scoop)

  • For OSX I use pngpaste (could be installed using brew)

  • For Linux — xclip could be used (thx Matthias Fulz @mfulz)

animated screen with image pasting
setup
" first `%s` is a path
" second `%s` is an image file name
" this is default for windows
let g:asciidoctor_img_paste_command = 'gm convert clipboard: %s%s'

" for osx
" let g:asciidoctor_img_paste_command = 'pngpaste %s%s'

" for linux
" let g:asciidoctor_img_paste_command = 'xclip -selection clipboard -t image/png -o > %s%s'



" first `%s` is a base document name:
" (~/docs/hello-world.adoc => hello-world)
" second `%s` is a number of the image.
let g:asciidoctor_img_paste_pattern = 'img_%s_%s.png'

If there is :imagesdir: as an option set up in a document, clipboard image is saved there (relative to the document). Otherwise image is saved in the documents directory.

The name of the image is generated according to the pattern. By default it is

img_ + document_base_name + next_image_number + .png

Bibliography completion

There is initial support for bibliography completion. Works with *.bib files placed to the same folder as file being edited.

No setup is needed although additional setting for a base bibtex folder might be added in the future.

It uses vim’s completefunc which is usually called in insert mode with <C-X><C-U>, and it works for

cite:[<C-X><C-U>
cite:[cit<C-X><C-U>
citenp:[cit<C-X><C-U>
Note

To create bibliography in asciidoctor, i.e., to put it into PDF or HTML you should install asciidoctor-bibtex extension and provide it to vim-asciidoctor extension list(s):

" For asciidoctor backend
let g:asciidoctor_extensions = ['asciidoctor-bibtex']
" For asciidoctor-pdf backend
let g:asciidoctor_pdf_extensions = ['asciidoctor-bibtex']

Misc

Generate HTML on file save

Add following snippet to your vim config to generate an HTML file upon saving:

augroup ON_ASCIIDOCTOR_SAVE | au!
    au BufWritePost *.adoc :Asciidoctor2HTML
augroup end

If you want to add text files to the mix you can have something similar to:

func! ConvertAsciidoctorToHTML()
    " Text file with asciidoctor contents?
    if &filetype == 'text' && getline(1) =~ '^= .*$'
        " text files have no asciidoctor commands
        set filetype=asciidoctor
        Asciidoctor2HTML
        set filetype=text
    elseif &filetype == 'asciidoctor'
        Asciidoctor2HTML
    endif
endfunc
augroup ON_ASCIIDOCTOR_SAVE | au!
    au BufWritePost *.adoc,*.txt call ConvertAsciidoctorToHTML()
augroup end
Note
if you have vim-dispatch installed HTML conversion would be done in background.

Highlight group names

Colorschemes can use following highlight groups to redefine default highlighting:

Highlight Group Name Default Value

asciidoctorTitle

Title

asciidoctorSetextHeader

Title

asciidoctorH1

Title

asciidoctorH2

Title

asciidoctorH3

Title

asciidoctorH4

Title

asciidoctorH5

Title

asciidoctorH6

Title

asciidoctorTitleDelimiter

Type

asciidoctorH1Delimiter

Type

asciidoctorH2Delimiter

Type

asciidoctorH3Delimiter

Type

asciidoctorH4Delimiter

Type

asciidoctorH5Delimiter

Type

asciidoctorH6Delimiter

Type

asciidoctorSetextHeaderDelimiter

Type

asciidoctorListMarker

Delimiter

asciidoctorOrderedListMarker

asciidoctorListMarker

asciidoctorListContinuation

PreProc

asciidoctorComment

Comment

asciidoctorIndented

Comment

asciidoctorPlus

PreProc

asciidoctorPageBreak

PreProc

asciidoctorCallout

Float

asciidoctorCalloutDesc

String

asciidoctorListingBlock

Comment

asciidoctorLiteralBlock

Comment

asciidoctorFile

Underlined

asciidoctorUrl

Underlined

asciidoctorEmail

Underlined

asciidoctorUrlAuto

Underlined

asciidoctorEmailAuto

Underlined

asciidoctorUrlDescription

String

asciidoctorLink

Underlined

asciidoctorAnchor

Underlined

asciidoctorAttribute

Identifier

asciidoctorCode

Constant

asciidoctorOption

PreProc

asciidoctorBlock

PreProc

asciidoctorBlockOptions

PreProc

asciidoctorTableSep

PreProc

asciidoctorTableCell

PreProc

asciidoctorTableEmbed

PreProc

asciidoctorInlineAnchor

PreProc

asciidoctorMacro

Macro

asciidoctorIndexTerm

Macro

asciidoctorBold

gui=bold cterm=bold

asciidoctorItalic

gui=italic cterm=italic

asciidoctorBoldItalic

gui=bold,italic cterm=bold,italic

If you want to change highlight yourself for existing colorscheme without touching it, add the following to you vimrc:

func! AsciidoctorHighlight()
    " Highlight asciidoctor syntax with colors you like.
    " For solarized8 colorscheme
    if get(g:, "colors_name", "default") == "solarized8"
        hi asciidoctorTitle guifg=#ff0000 gui=bold ctermfg=red cterm=bold
        hi asciidoctorOption guifg=#00ff00 ctermfg=green
        hi link asciidoctorH1 Directory
    elseif get(g:, "colors_name", "default") == "default"
        hi link asciidoctorIndented PreProc
    endif
endfunc
augroup ASCIIDOCTOR_COLORS | au!
    au Colorscheme * call AsciidoctorHighlight()
    au BufNew,BufRead *.adoc call AsciidoctorHighlight()
augroup end

Limitations

Indented text is highlighted for all table cells

Works for all table cells, although should only be applied to a| cells.

[cols=".^1,.^2", options="header"]
|===
| header1
| header1

| Regular table cell

    Indented text is highlighted as indented
    which is kind of incorrect

a| Asciidoctor cell

    Indented text is highlighted as indented
    which is correct

|===

Setext-style headers highlighting

Proper setext-style highlighting should have equal numbers of underlined chars:

This Header level 1
===================

This Header level 2
-------------------

This Header level 3
~~~~~~~~~~~~~~~~~~~

This Header level 4
^^^^^^^^^^^^^^^^^^^

This Header level 5
+++++++++++++++++++

Vim can’t do it so setext-style headers are highlighted no matter if there is matched underline or not.

This Header level 1
======================

This Header level 2
-----

This Header level 3
~~~~~~~~~~~~~~~~

This Header level 4
^^^^^^^^^^^^^^^^^^^^

This Header level 5
+++++++++++++

You can also use following mappings:

" Underline current line
func! s:underline(chars)
    let nextnr = line('.') + 1
    let underline = repeat(a:chars[0], strchars(getline('.')))
    if index(a:chars, trim(getline(nextnr))[0]) != -1
        call setline(nextnr, underline)
    else
        call append('.', underline)
    endif
endfunc
nnoremap <leader>- :call <SID>underline(['-', '=', '~', '^', '+'])<CR>
nnoremap <leader>= :call <SID>underline(['=', '-', '~', '^', '+'])<CR>
nnoremap <leader>~ :call <SID>underline(['~', '=', '-', '^', '+'])<CR>
nnoremap <leader>^ :call <SID>underline(['^', '=', '-', '~', '+'])<CR>
nnoremap <leader>+ :call <SID>underline(['+', '=', '-', '~', '^'])<CR>

URL Conceal

Links with additional attributes are not concealed to description:

https://discuss.asciidoctor.org[Discuss Asciidoctor,role=external,window=_blank]
https://discuss.asciidoctor.org[Discuss Asciidoctor^]
https://example.org["Google, Yahoo, Bing^",role=teal]

With set conceallevel=3 looks like:

Discuss Asciidoctor,role=external,window=_blank
Discuss Asciidoctor^
"Google, Yahoo, Bing^",role=teal

Although it should look like:

Discuss Asciidoctor
Discuss Asciidoctor
Google, Yahoo, Bing

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Asciidoctor plugin for Vim

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