Is there some manual way to add my own snippets to your plugin, or now I need to clone it and edit by hands?

[daniilrozanov]

I think this plugin gives pretty good capabilities to add custom snippets

[iurimateus]

To remove a snippet, you can use the luasnip API. I think you might be able to mutate the tables that are required on init.lua, but it's a bit hacky.

You can override a snippet by adding another with the same trigger, but with a higher priority. Most have default prio of 0.

Example, overriding mk to $$

local ls = require("luasnip")
local conds = require("luasnip.extras.expand_conditions")
 
local utils = require("luasnip-latex-snippets.util.utils")

local not_math = utils.not_math() -- pass true if using Treesitter

local snip = ls.parser.parse_snippet({ trig = "mk", name = "Math" }, "$ ${1:${TM_SELECTED_TEXT}} $$0")

snip.condition = not_math
snip.priority = 10 -- anything greater than 0.

ls.add_snippets("tex", { snip }, {
    type = "autosnippets",
})

Do you have an interface in mind?

[kiryph]

Can one specify the file where the given code snippet can be put?
Also considering lazy loading, e.g. by packer.nvim, so that the latex snippets are still only loaded for tex files.

Putting it into ~/.config/nvim/after/ftplugin/tex.lua complains that "luasnip-latex-snippets.util.utils" cannot be found. I would have assumed that this file is sourced after ftplugins. But apparently not. For the record: the default snippets are loaded.

Also giving a hacky solution to remove a snippet would be helpful.

And can one fix the code to be valid lua (lua is not javascript).

[kiryph]

I have added the snippet to the config function of packer.nvim. Do not to forget to run :PackerCompile (https://github.com/wbthomason/packer.nvim#compiling-lazy-loaders).

  use {
    'iurimateus/luasnip-latex-snippets.nvim',
    requires = { 'L3MON4D3/LuaSnip', 'lervag/vimtex' },
    config = function()
      require'luasnip-latex-snippets'.setup()

      -- Modify existing snippets using higher priority and util function from luasnip-latex-snippets
      local ls = require("luasnip")
      local s = ls.snippet
      local i = ls.insert_node
      local fmta = require("luasnip.extras.fmt").fmta
      local utils = require("luasnip-latex-snippets.util.utils")
      local not_math = utils.with_opts(utils.not_math, false) -- when using treesitter, change false to true

      ls.add_snippets("tex", {
        s({trig = "mk", snippetType="autosnippet", priority=100},
          fmta("$<>$<>", { i(1), i(2), }), {condition = not_math}
        ),
        -- ...
      })
    end,
    ft = "tex",
  }

[iurimateus]

Also giving a hacky solution to remove a snippet would be helpful.

This is what I use for friendly-snippets:

local function dups_tex(s)
  local description = type(s.dscr) == "table" and s.dscr[1] or s.dscr
  return
    (
      s.name == "Bold Text"
      or s.name == "Italic Text"
      or s.name == "Math"
      or s.name == "Sub Section"
      or s.name == "Sub Sub Section"
    )
      or s.trigger == "item"
      or s.trigger:match "mathinline$"
      or ((s.name == "Theorem" or s.name == "Proof") and description and #description < 30)
end

local license_or_copyright = function(s)
  local description = type(s.dscr) == "table" and s.dscr[1] or s.dscr
  return description and description:match "License" or s.name == "copyright"
end

local function remove_s(s, fn)
  if s and fn and fn(s) then
    s:invalidate()
    return true
  end
end

-- Remove 'License' and 'copyright' snippets from friendly-snippets
local _remove = function(bufnr, ft)
  if bufnr == 0 or bufnr == nil then
    bufnr = vim.api.nvim_get_current_buf()
  end

  ft = ft or vim.bo[bufnr].filetype

  -- https://github.com/rafamadriz/friendly-snippets/blob/main/snippets/global.json
  local all_snippets = ls.get_snippets "all"
  local ft_snippets = ls.get_snippets(ft)

  for _, t in ipairs { all_snippets, ft_snippets } do
    for _, s in pairs(t) do
      remove_s(s, license_or_copyright)
    end
  end

  if ft == "tex" then
    for _, s in pairs(ft_snippets) do
      remove_s(s, dups_tex)
    end
  end
end

local known = {}
local g = vim.api.nvim_create_augroup("__remove_ls_snippets", {})
vim.api.nvim_create_autocmd("User", {
  group = g,
  pattern = "LuasnipSnippetsAdded",
  callback = function(args)
    local ft = vim.bo[args.buf].filetype or "empty"
    if not known[ft] then
      known[ft] = vim.loop.new_timer()
    end

    known[ft]:start(
      500,
      0,
      vim.schedule_wrap(function()
        _remove(args.buf, ft)
      end)
    )
  end,
})

vim.api.nvim_create_user_command("RemoveLicenseSnippets", function()
  _remove()
end, {})

_remove()

Timers (known) are leaking though.

And can one fix the code to be valid lua (lua is not javascript).

?

[kiryph]

?

I was referring to var snip and comments introduced with // which is not valid lua.

[iurimateus]

I was referring to var snip and comments introduced with // which is not valid lua.

Thanks, fixed it.