User configurable latex lsp#2 (#861)

* Adjust tex.lua and default-config for lsp magic

With this commit table elements are added to default-config.lua, which
are referenced in tex.lua. The settings are set to default.

This enables the user to configure settings accordingly inside of
lv-config.lua.
- build arguments
- forwardsearch executable e.g. zathura
- forwardsearch arguments for chosen executable are implemented
  automatically
- handlers for virtual_text, signs, underline and update_in_insert are
  set to the default

* Added Texlab-Build and Forward as which-keys

With this commit the two commands `:TexlabBuild` and `:TexlabForward`
are added as which-keys under the category +LaTeX.

- b is for TexlabBuild
- p is for TexlanForward (Preview)

* Change which-key for +Latex

The which-key for +Latex has to be changed because `L` is already used
by +Lush.

With this commit the which-key for +Latex is changed to `t`.

* Add documentation of options

All configurable texlab option is documented in lv-config.example.lua.

Also a link to the documentation of the options from latex-lsp/texlab
is added.

1 files changed, 16 insertions, 1 deletions

diff --git a/utils/installer/lv-config.example.lua b/utils/installer/lv-config.example.lua
index 7072c60c..c52a6e0d 100644
--- a/utils/installer/lv-config.example.lua
+++ b/utils/installer/lv-config.example.lua
@@ -52,7 +52,22 @@ O.lang.tsserver.linter = nil
 --   args = {"--emit=stdout", "--edition=2018"},
 -- }
 
--- latex
+--LaTeX
+-- Options: https://github.com/latex-lsp/texlab/blob/master/docs/options.md
+O.lang.latex.active = true
+O.lang.latex.aux_directory = "."
+O.lang.latex.bibtex_formatter = "texlab"
+O.lang.latex.build.args = { '-pdf', '-interaction=nonstopmode', '-synctex=1', '%f' }
+O.lang.latex.build.executable = "latexmk"
+O.lang.latex.build.forward_search_after = false
+O.lang.latex.build.on_save = false
+O.lang.latex.chktex.on_edit = false
+O.lang.latex.chktex.on_open_and_save = false
+O.lang.latex.diagnostics_delay = 300
+O.lang.latex.formatter_line_length = 80
+O.lang.latex.forward_search.executable = "zathura"
+O.lang.latex.latex_formatter = "latexindent"
+O.lang.latex.latexindent.modify_line_breaks = false
 -- O.lang.latex.auto_save = false
 -- O.lang.latex.ignore_errors = { }