[nvim] adopt lspsaga for lsp ux

config/nvim/lua/plugins/lasagna.lua

@@ -0,0 +1,100 @@
+return {
+	"glepnir/lspsaga.nvim",
+	event = "LspAttach",
+	config = function()
+		require("lspsaga").setup({
+			lightbulb = {
+				virtual_text = false,
+			},
+			hover = {
+				open_browser = "!firefox",
+			},
+			symbol_in_winbar = {
+				enable = false,
+			},
+      diagnostic = {
+        show_code_action = false,
+      },
+		})
+
+		local keymap = vim.keymap.set
+
+		-- LSP finder - Find the symbol's definition
+		-- If there is no definition, it will instead be hidden
+		-- When you use an action in finder like "open vsplit",
+		-- you can use <C-t> to jump back
+		keymap("n", "gh", "<cmd>Lspsaga lsp_finder<CR>")
+
+		-- Code action
+		keymap({ "n", "v" }, "<leader>ca", "<cmd>Lspsaga code_action<CR>")
+
+		-- Rename all occurrences of the hovered word for the entire file
+		keymap("n", "gr", "<cmd>Lspsaga rename<CR>")
+
+		-- Peek definition
+		-- You can edit the file containing the definition in the floating window
+		-- It also supports open/vsplit/etc operations, do refer to "definition_action_keys"
+		-- It also supports tagstack
+		-- Use <C-t> to jump back
+		keymap("n", "gp", "<cmd>Lspsaga peek_definition<CR>")
+
+		-- Go to definition
+		keymap("n", "gd", "<cmd>Lspsaga goto_definition<CR>")
+
+		-- Peek type definition
+		-- You can edit the file containing the type definition in the floating window
+		-- It also supports open/vsplit/etc operations, do refer to "definition_action_keys"
+		-- It also supports tagstack
+		-- Use <C-t> to jump back
+		keymap("n", "gt", "<cmd>Lspsaga peek_type_definition<CR>")
+
+		-- Show line diagnostics
+		-- You can pass argument ++unfocus to
+		-- unfocus the show_line_diagnostics floating window
+		keymap("n", "<leader>sl", "<cmd>Lspsaga show_line_diagnostics<CR>")
+
+		-- Show buffer diagnostics
+		keymap("n", "<leader>sb", "<cmd>Lspsaga show_buf_diagnostics<CR>")
+
+		-- Show workspace diagnostics
+		keymap("n", "<leader>sw", "<cmd>Lspsaga show_workspace_diagnostics<CR>")
+
+		-- Show cursor diagnostics
+		keymap("n", "<leader>sc", "<cmd>Lspsaga show_cursor_diagnostics<CR>")
+
+		-- Diagnostic jump
+		-- You can use <C-o> to jump back to your previous location
+		keymap("n", "<leader>ep", "<cmd>Lspsaga diagnostic_jump_prev<CR>")
+		keymap("n", "<leader>en", "<cmd>Lspsaga diagnostic_jump_next<CR>")
+
+		-- Diagnostic jump with filters such as only jumping to an error
+		keymap("n", "<leader>Ep", function()
+			require("lspsaga.diagnostic"):goto_prev({ severity = vim.diagnostic.severity.ERROR })
+		end)
+		keymap("n", "<leader>En", function()
+			require("lspsaga.diagnostic"):goto_next({ severity = vim.diagnostic.severity.ERROR })
+		end)
+
+		-- Toggle outline
+		keymap("n", "<leader>o", "<cmd>Lspsaga outline<CR>")
+
+		-- Hover Doc
+		-- If there is no hover doc,
+		-- there will be a notification stating that
+		-- there is no information available.
+		-- To disable it just use ":Lspsaga hover_doc ++quiet"
+		-- Pressing the key twice will enter the hover window
+		keymap("n", "K", "<cmd>Lspsaga hover_doc<CR>")
+
+		-- Call hierarchy
+		keymap("n", "<Leader>ci", "<cmd>Lspsaga incoming_calls<CR>")
+		keymap("n", "<Leader>co", "<cmd>Lspsaga outgoing_calls<CR>")
+
+		-- Floating terminal
+		keymap({ "n", "t" }, "<A-d>", "<cmd>Lspsaga term_toggle<CR>")
+	end,
+	dependencies = {
+		{ "nvim-tree/nvim-web-devicons" },
+		{ "nvim-treesitter/nvim-treesitter" },
+	},
+}

config/nvim/lua/plugins/lsp.lua

@@ -39,25 +39,11 @@ return {
 		local handlers = {}
 		local opts = { noremap = true, silent = true }
 
-		vim.keymap.set("n", "<space>e", "<cmd>lua vim.diagnostic.open_float()<CR>", opts)
-		vim.keymap.set("n", "<space>en", "<cmd>lua vim.diagnostic.goto_next()<CR>", opts)
-		vim.keymap.set("n", "<space>ep", "<cmd>lua vim.diagnostic.goto_prev()<CR>", opts)
-		vim.keymap.set("n", "<space>q", "<cmd>lua vim.diagnostic.setloclist()<CR>", opts)
-
 		local on_attach = function(_, bufnr)
 			-- Mappings.
 			local bufopts = { noremap = true, silent = true, buffer = bufnr }
 
-			-- See `:help vim.lsp.*` for documentation on any of the below functions
-			vim.keymap.set("n", "gD", vim.lsp.buf.declaration, bufopts)
-			vim.keymap.set("n", "gd", vim.lsp.buf.definition, bufopts)
-			vim.keymap.set("n", "K", vim.lsp.buf.hover, bufopts)
-			vim.keymap.set("n", "gi", vim.lsp.buf.implementation, bufopts)
-			vim.keymap.set("n", "<C-k>", vim.lsp.buf.signature_help, bufopts)
-			vim.keymap.set("n", "<space>D", vim.lsp.buf.type_definition, bufopts)
-			vim.keymap.set("n", "<space>rn", vim.lsp.buf.rename, bufopts)
-			vim.keymap.set("n", "<space>ca", vim.lsp.buf.code_action, bufopts)
-			vim.keymap.set("n", "gr", vim.lsp.buf.references, bufopts)
+			-- See `:help vim.lsp.*` for more methods
 			vim.keymap.set("n", "<space>f", vim.lsp.buf.format, bufopts)
 		end
 

config/nvim/lua/plugins/lualine.lua

@@ -1,7 +1,7 @@
 return {
 	"hoob3rt/lualine.nvim",
 	dependencies = {
-		"kyazdani42/nvim-web-devicons",
+		"nvim-tree/nvim-web-devicons",
 	},
 	opts = {
 		options = {