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path: root/lua/plugins/completion.lua
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local has_words_before = function()
	local line, col = unpack(vim.api.nvim_win_get_cursor(0))
	return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
end

-- luasnip setup
local luasnip = require 'luasnip'

local cmp_kinds = {
	Text = "",
	Method = "󰆧",
	Function = "󰊕",
	Constructor = "",
	Field = "󰇽",
	Variable = "󰂡",
	Class = "󰠱",
	Interface = "",
	Module = "",
	Property = "󰜢",
	Unit = "",
	Value = "󰎠",
	Enum = "",
	Keyword = "󰌋",
	Snippet = "",
	Color = "󰏘",
	File = "󰈙",
	Reference = "",
	Folder = "󰉋",
	EnumMember = "",
	Constant = "󰏿",
	Struct = "",
	Event = "",
	Operator = "󰆕",
	TypeParameter = "󰅲",
}

-- nvim-cmp setup
local cmp = require('cmp')
cmp.setup {
	formatting = {
		fields = { "kind", "abbr" },
		format = function(_, vim_item)
			vim_item.kind = cmp_kinds[vim_item.kind] or ""
			return vim_item
		end,
	},
	snippet = {
		expand = function(args)
			require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
		end,
	},
	window = {
		 completion = cmp.config.window.bordered(),
		 documentation = cmp.config.window.bordered(),
	},
	mapping = cmp.mapping.preset.insert({
		['<C-d>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-Space>'] = cmp.mapping.complete(),
		['<CR>'] = cmp.mapping.confirm {
			behavior = cmp.ConfirmBehavior.Insert,
			select = true,
		},
		['<Tab>'] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			elseif has_words_before() then
				cmp.complete()
			else
				fallback()
			end
		end, { "i", "s" }),
		['<S-Tab>'] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, { 'i', 's' }),
	}),
	sources = cmp.config.sources({
		{ name = 'luasnip',                option = { use_show_condition = false } },
		{ name = 'nvim_lsp' },
		{ name = 'nvim_lsp_signature_help' },
		{ name = 'path' },
		{ name = 'buffer' },
		{ name = 'nvim_lua' },
		{ name = 'vimtex' },
	}),
}

-- Set configuration for specific filetype.
cmp.setup.filetype('gitcommit', {
	sources = cmp.config.sources({
		{ name = 'git' }, -- You can specify the `cmp_git` source if you were installed it.
		{ name = 'buffer' },
	}),
	require("cmp_git").setup(),
})

-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
require 'cmp'.setup.cmdline('/', {
	completion = { autocomplete = false },
	sources = {
		-- { name = 'buffer' }
		{ name = 'buffer', opts = { keyword_pattern = [=[[^[:blank:]].*]=] } }
	}
})

-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline(':', {
	completion = { autocomplete = false },
	sources = cmp.config.sources({
		{ name = 'path' }
	}, {
		{ name = 'cmdline' }
	})
})

-- If you want insert `(` after select function or method item
local cmp_autopairs = require('nvim-autopairs.completion.cmp')
cmp.event:on(
	'confirm_done',
	cmp_autopairs.on_confirm_done()
)

-- lazy loading to get in memory snippets of languages you use
require("luasnip/loaders/from_vscode").lazy_load()

vim.diagnostic.config({
	virtual_text = false,
	signs = true,
	underline = false,
	update_in_insert = true,
	severity_sort = false,
	float = {
		source = true,
	},
})