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-- luasnip setup
local luasnip = require 'luasnip'

local kind_icons = {
	Text = "",
	Method = "",
	Function = "",
	Constructor = "",
	Field = "",
	Variable = "",
	Class = "ﴯ",
	Interface = "",
	Module = "",
	Property = "ﰠ",
	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 = {
		format = function(entry, vim_item)
			local label = vim_item.abbr
			local truncated_label = vim.fn.strcharpart(label, 0, 50)
			if truncated_label ~= label then
				vim_item.abbr = truncated_label .. '...'
			end
			vim_item.kind = string.format('%s %s', kind_icons[vim_item.kind], vim_item.kind)
			vim_item.menu = ({
				buffer = "[Buffer]",
				nvim_lsp = "[LSP]",
				luasnip = "[LuaSnip]",
				nvim_lua = "[Lua]",
				latex_symbols = "[LaTeX]",
			})[entry.source.name]
			return vim_item
		end
	},
	view = {
		entries = "custom",
	},
	snippet = {
		expand = function(args)
			require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
		end,
	},
	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.Replace,
			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()
			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 = {
		{ name = 'path' },
		{ name = 'buffer' },
		{ name = 'nvim_lsp_signature_help' },
		{ name = 'nvim_lsp' },
		{ name = 'luasnip' },
		{ name = 'nvim_lua' },
	},
}
-- Set configuration for specific filetype.
cmp.setup.filetype('gitcommit', {
	sources = cmp.config.sources({
		{ name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
	}, {
		{ name = 'buffer' },
	})
})
-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
require'cmp'.setup.cmdline('/', {
	sources = {
		{ name = 'buffer' } -- cmp-buffer needed
	}
})
-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
require'cmp'.setup.cmdline(':', {
	sources = {
		{ name = 'cmdline' },
		{ name = 'path' }, -- cmp-path needed
	}
})