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path: root/.config/nvim/lua/lsp.lua
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---LSP OnAttach
---@param client vim.lsp.Client
---@param buf integer
function Lsp(client, buf)
	vim.keymap.set('n', '<leader>f', function()
		vim.lsp.buf.format { async = true }
	end, { buffer = buf })

	vim.api.nvim_buf_create_user_command(buf, "Format", function(args)
		local range = nil
		if args.count ~= -1 then
			local end_line = vim.api.nvim_buf_get_lines(0, args.line2 - 1, args.line2, true)[1]
			range = {
				start = { args.line1, 0 },
				["end"] = { args.line2, end_line:len() },
			}
		end
		vim.lsp.buf.format { async = true, range = range, bufnr = buf }
	end, { range = true })

	vim.keymap.set('n', '<leader>wa', function()
		vim.lsp.buf.add_workspace_folder()
	end, { buffer = buf })

	vim.keymap.set('n', '<leader>wr', function()
		vim.lsp.buf.remove_workspace_folder()
	end, { buffer = buf })

	vim.keymap.set('n', '<leader>wl', function()
		local dir = vim.lsp.buf.list_workspace_folders()
		vim.ui.select(dir, {
			prompt = 'Workspace Dir: ',
		}, function(result)
			if result then
				vim.api.nvim_set_current_dir(result)
			end
		end)
	end, { buffer = buf })

	vim.api.nvim_buf_create_user_command(buf, "Symbols", function(args)
		if args.args == ""
		then
			vim.lsp.buf.workspace_symbol()
		else
			vim.lsp.buf.workspace_symbol(args.args)
		end
	end, { nargs = "?" })


	if client:supports_method('textDocument/inlayHint') then
		vim.lsp.inlay_hint.enable()

		vim.keymap.set('n', '<leader>ih', function()
			vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled())
		end, { buffer = buf })
	end

	if client:supports_method('textDocument/completion') then
		local chars = {}
		for i = 32, 126 do
			table.insert(chars, string.char(i))
		end
		client.server_capabilities.completionProvider.triggerCharacters = chars
		vim.lsp.completion.enable(true, client.id, buf, { autotrigger = true })
	end

	if client:supports_method('textDocument/documentHighlight') then
		local highlight_augroup = vim.api.nvim_create_augroup('lsp-highlight',
			{ clear = false })
		vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
			buffer = buf,
			group = highlight_augroup,
			callback = vim.lsp.buf.document_highlight,
		})

		vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI' }, {
			buffer = buf,
			group = highlight_augroup,
			callback = vim.lsp.buf.clear_references,
		})

		vim.api.nvim_create_autocmd('LspDetach', {
			callback = function(event)
				vim.lsp.buf.clear_references()
				vim.api.nvim_clear_autocmds {
					group = highlight_augroup,
					buffer = event.buf
				}
			end,
		})
	end

	if client:supports_method('textDocument/foldingRange') then
		local win = vim.api.nvim_get_current_win()

		vim.wo[win][0].foldmethod = "expr"
		vim.wo[win][0].foldexpr = 'v:lua.vim.lsp.foldexpr()'
	end

	if client:supports_method('textDocument/codelens') then
		vim.keymap.set({ 'n', 'v' }, 'grl', function()
			vim.lsp.codelens.run()
		end, { buffer = buf })
		vim.lsp.codelens.refresh { bufnr = buf }
		vim.api.nvim_create_autocmd({ 'CursorHold', 'InsertLeave' }, {
			buffer = buf,
			callback = function()
				vim.lsp.codelens.refresh { bufnr = buf }
			end,
		})
	end
end

return Lsp