added lsp-functionality with custom colors

nvim/.config/nvim/after/plugin/lspconfig.lua

@@ -0,0 +1,88 @@
+local opts = { noremap = true, silent = true }
+vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
+vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
+vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
+vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)
+
+local on_attach = function(client, bufnr)
+    -- Enable completion triggered by <c-x><c-o>
+    vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+    -- Mappings.
+    -- See `:help vim.lsp.*` for documentation on any of the below functions
+    local bufopts = { noremap = true, silent = true, buffer = bufnr }
+    vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
+    vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
+    vim.keymap.set('n', '<leader>K', vim.lsp.buf.hover, bufopts)
+    vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
+    vim.keymap.set('n', '<leader><C-k>', vim.lsp.buf.signature_help, bufopts)
+    vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
+    vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
+    vim.keymap.set('n', '<space>wl', function()
+        print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+    end, 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)
+    vim.keymap.set('n', '<space>fm', function() vim.lsp.buf.format { async = true } end, bufopts)
+end
+
+local signs = { Error = " ", Warn = " ", Hint = " ", Info = " " }
+for type, icon in pairs(signs) do
+    local hl = "DiagnosticSign" .. type
+    vim.fn.sign_define(hl, { text = icon, texthl = hl })
+end
+
+
+local border = {
+    { "╭", "FloatBorder" },
+    { "─", "FloatBorder" },
+    { "╮", "FloatBorder" },
+    { "│", "FloatBorder" },
+    { "╯", "FloatBorder" },
+    { "─", "FloatBorder" },
+    { "╰", "FloatBorder" },
+    { "│", "FloatBorder" },
+}
+
+vim.diagnostic.config({
+    float = { border = border },
+    virtual_text = {
+        prefix = '▎', -- Could be '●', '■', 'x'
+    }
+
+})
+
+-- LSP settings (for overriding per client)
+local handlers = {
+    ["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, { border = border }),
+    ["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, { border = border }),
+}
+
+require("mason").setup({
+    ui = {
+        border = "rounded",
+        icons = {
+            package_installed = "✔",
+            package_pending = "➜",
+            package_uninstalled = "✘"
+        }
+    }
+})
+
+require("mason-lspconfig").setup({
+    ensure_installed = { "sumneko_lua" }
+})
+
+require("mason-lspconfig").setup_handlers {
+    -- The first entry (without a key) will be the default handler
+    -- and will be called for each installed server that doesn't have
+    -- a dedicated handler.
+    function(server_name) -- default handler (optional)
+        require("lspconfig")[server_name].setup {
+            on_attach = on_attach,
+            handlers = handlers,
+        }
+    end,
+}

nvim/.config/nvim/after/plugin/nvim-cmp.lua

@@ -125,7 +125,6 @@ cmp.setup({
     }, {
     })
 })
-
 -- Set configuration for specific filetype.
 cmp.setup.filetype('gitcommit', {
     sources = cmp.config.sources({

nvim/.config/nvim/lua/pr073c70r/colors.lua

@@ -1,5 +1,4 @@
 -- setting colors
-
 -- everforest
 vim.api.nvim_set_var("everforest_background", "hard")
 vim.api.nvim_set_var("everforest_transparent_background", "1")
@@ -40,6 +39,15 @@ vim.api.nvim_set_hl(0, "VertSplit", {bg = "none", fg = "#1d2021"})
 vim.api.nvim_set_hl(0, "Cursorline", {bg = "#141617"})
 vim.api.nvim_set_hl(0, "CursorLineNr", {bold = true, bg = "#141617", fg = "#d8a657"})
 
+-- color of Floats and FloatBorders
+vim.api.nvim_set_hl(0, "NormalFloat", {bg = none, fg = none })
+vim.api.nvim_set_hl(0, "FloatBorder", {bg = none, fg = "#d4be98"})
+
+vim.api.nvim_set_hl(0, "DiagnosticFloatingWarn", {bg = none, fg = "#d8a657"})
+vim.api.nvim_set_hl(0, "DiagnosticFloatingError", {bg = none, fg = "#ea6962"})
+vim.api.nvim_set_hl(0, "DiagnosticFloatingHint", {bg = none, fg = "#a9b665"})
+vim.api.nvim_set_hl(0, "DiagnosticFloatingInfo", {bg = none, fg = "#d4be98"})
+
 -- transparent background in active, non active and at the end of buffer for colorschemes which does not support such options
 -- vim.api.nvim_set_hl(0, "Normal", { bg = "none" })
 -- vim.api.nvim_set_hl(0, "NormalNC", { bg = "none" })

nvim/.config/nvim/lua/pr073c70r/packer.lua

@@ -28,9 +28,12 @@ return require('packer').startup(function(use)
     use 'lukas-reineke/indent-blankline.nvim'
 
     -- LSP
-
+    use {
+        {'williamboman/mason.nvim'},
+        {'williamboman/mason-lspconfig.nvim'},
+        {'neovim/nvim-lspconfig'},
+    }
     -- Autocomplete
-    use 'neovim/nvim-lspconfig'
     use {
         'hrsh7th/nvim-cmp',
         requires = {