How to set preview in nvim

[jkunlin]

Does it possible to set up the previewing and build on save in nvim just like vimtex?
I see the document here https://texlab.netlify.com/docs/installation/previewing. But have no idea how to configure in nvim.

[jkunlin]

I am using coc as the LSP client in nvim

[pfoerster]

Building on save is turned off by default.
However, you can enable it by setting latex.build.onSave to true.
As far as I know, the language server can be configured using :CocConfig (see https://github.com/neoclide/coc.nvim/wiki/Using-the-configuration-file#configuration-file-resolve). Then you can paste the following snippet:

{
    "latex.build.onSave": true
}

and save the file. Now, TexLab should build your documents using latexmk
every time you save a document. latexmk is responsible for calling your PDF viewer.
See https://texlab.netlify.com/docs/installation/previewing for more instructions. Additional settings can be found on our website.

[jkunlin]

I add the following line to my ~/.latexmkrc file: $pdf_previewer = 'start okular --unique';
And the coc-setting as follow
"latex.build.args": [ "-pdf", "-interaction=nonstopmode", "-synctex=1", "-pv" ], "latex.build.onSave": true, "latex.forwardSearch.executable": "okular", "latex.forwardSearch.args": [ "--unique", "file:%p#src:%l%f" ],
But the forward search does not work.

[efoerster]

The problem is that forward search can be only implemented with a custom LSP request that the client has to implement. For Vim, there is the coc-texlab extension that will hopefully implement it soon, see issue #2 on their repo.

[oblitum]

No forward search yet but my current setup for preview with coc-texlab (:CocCommand latex.Build) is:

.vimrc

  call coc#config('latex', {
  \   'lint.onChange': v:true,
  \   'forwardSearch.executable': 'zathura',
  \   'forwardSearch.args': ['--synctex-forward', '%l:1:%f', '%p'],
  \   'build.args': ['-pdf', '-interaction=nonstopmode', '-synctex=1', '-pvc']
  \ })

Important flag with zathure is -pvc, as the example in the wiki uses -pv, which launches a new zathura instance on every build, -pvc will launch continuous build and just a single instance is launched and updated on write. Not sure about a way to stop though.

[fannheyward]

coc-texlab has added latex.ForwardSearch, give it a try.

[jkunlin]

Thanks very much! It works with okular.