nvim-config-kickstart/after/plugin/mappings.lua

--[[
-- Contains fixes for mappings created by plugins
-- Useful because of bépo
--]]

-- Comments.nvim adds `gbc` command, which conflicts with `gb/gé` to move
-- between tabs
if vim.fn.maparg("gbc") ~= "" then
  vim.keymap.del("n", "gbc")
  vim.keymap.set('n', 'gBc', function()
    return vim.api.nvim_get_vvar('count') == 0 and '<Plug>(comment_toggle_blockwise_current)'
        or '<Plug>(comment_toggle_blockwise_count)'
  end, { expr = true, desc = 'Comment toggle current block' })
end

-- [[ vimtex ]]
-- Some BÉPO mappings for vimtex
local texgroup = vim.api.nvim_create_augroup("latex-after", { clear = true })

vim.api.nvim_create_autocmd({ "BufEnter", "BufWinEnter" }, {
  pattern = { "*.tex", "*.bib", "*.cls", "*.tikz", },
  group = texgroup,
  callback = function()
    local vimtex_remaps = {
      -- c <-> t
      { mode = "n",          source = "csd", target = "lsd", command = "<Plug>(vimtex-delim-change-math)" },
      { mode = "n",          source = "csc", target = "lsc", command = "<Plug>(vimtex-cmd-change)" },
      { mode = "n",          source = "cse", target = "lse", command = "<Plug>(vimtex-env-change)" },
      { mode = "n",          source = "cs$", target = "ls$", command = "<Plug>(vimtex-env-change-math))" },
      -- t <-> j
      { mode = { "x", "n" }, source = "tsD", target = "jsD", command = "<Plug>(vimtex-delim-toggle-modifier-reverse)" },
      { mode = { "x", "n" }, source = "tsd", target = "jsd", command = "<Plug>(vimtex-delim-toggle-modifier)" },
      { mode = { "x", "n" }, source = "tsf", target = "jsf", command = "<Plug>(vimtex-cmd-toggle-frac)" },
      { mode = "n",          source = "tsc", target = "jsc", command = "<Plug>(vimtex-cmd-toggle-star)" },
      { mode = "n",          source = "ts$", target = "js$", command = "<Plug>(vimtex-env-toggle-math)" },
      { mode = "n",          source = "tse", target = "jse", command = "<Plug>(vimtex-env-toggle-star)" },
    }

    for _, remap in pairs(vimtex_remaps) do
      if vim.fn.maparg(remap.source) ~= "" then
        vim.keymap.del(remap.mode, remap.source, { buffer = true })
        vim.keymap.set(remap.mode, remap.target, remap.command, { silent = true, noremap = true, buffer = true })
      end
    end
  end,
})