CHORE: Cleaned up the status bar and finished it

nvim/.config/nvim/lua/DarthMooMancer/ui.lua

@@ -1,4 +1,3 @@
---- Derive a highlight from an existing scheme group.
 local function derive_hl(name, opts)
 	local base = opts.base and vim.api.nvim_get_hl(0, { name = opts.base })
 		or {}
@@ -10,7 +9,7 @@ local function derive_hl(name, opts)
 		bold = opts.bold,
 	})
 end
---- Derive a mode highlight where bg comes from a syntax group and fg contrasts.
+
 local function derive_mode_hl(name, color_group)
 	local color = vim.api.nvim_get_hl(0, { name = color_group })
 	local status_bg = vim.api.nvim_get_hl(0, { name = 'StatusLine' })
@@ -21,7 +20,6 @@ local function derive_mode_hl(name, color_group)
 	})
 end
 
---- (Re)build all statusline highlight groups from current scheme.
 local function setup_statusline_highlights()
 	derive_mode_hl('StatusModeNormal', 'Type')
 	derive_mode_hl('StatusModeInsert', 'String')
@@ -29,9 +27,7 @@ local function setup_statusline_highlights()
 	derive_mode_hl('StatusModeCommand', 'PreProc')
 	derive_mode_hl('StatusModeReplace', 'WarningMsg')
 	derive_mode_hl('StatusModeTerminal', 'Special')
-	derive_hl('StatusGit', { base = 'CursorLine', fg = 'LineNr' })
-	-- derive_hl('StatusLsp', { base = 'StatusLine', fg = 'DiagnosticInfo' })
-	-- derive_hl('StatusLspSpinner', { base = 'StatusLine', fg = 'Constant' })
+	derive_hl('StatusGit', { base = 'CursorLine', fg = 'Normal' })
 	derive_hl(
 		'StatusLspWorking',
 		{ base = 'StatusLine', fg = 'DiagnosticInfo' }
@@ -45,7 +41,7 @@ local function setup_statusline_highlights()
 	derive_hl('StatusDiagWarn', { base = 'StatusLine', fg = 'DiagnosticWarn' })
 	derive_hl('StatusDiagHint', { base = 'StatusLine', fg = 'DiagnosticHint' })
 	derive_hl('StatusCursor', { base = 'CursorLine', fg = 'Normal' })
-	derive_hl('StatusGitAdded', { base = 'StatusLine', fg = 'MoreMsg' })
+	derive_hl('StatusGitAdded', { base = 'StatusLine', fg = 'DiagnosticOk' })
 	derive_hl(
 		'StatusGitRemoved',
 		{ base = 'StatusLine', fg = 'DiagnosticError' }
@@ -57,7 +53,6 @@ vim.api.nvim_create_autocmd('ColorScheme', {
 })
 setup_statusline_highlights()
 
---- Mode text mapping.
 local mode_map = {
 	n = ' NORM ',
 	i = ' INS ',
@@ -73,6 +68,7 @@ local mode_map = {
 	t = ' TERM ',
 	['!'] = ' SHELL ',
 }
+
 local mode_hl_map = {
 	n = 'StatusModeNormal',
 	i = 'StatusModeInsert',
@@ -89,7 +85,6 @@ local mode_hl_map = {
 	t = 'StatusModeTerminal',
 }
 
---- Git branch (async, cached per buffer, refreshed every 5s)
 local function refresh_status(buf)
 	local b = vim.b[buf]
 	local left, right = {}, {}
@@ -106,28 +101,34 @@ local function refresh_status(buf)
 			left[#left + 1] = '%#StatusGitRemoved# -' .. diff.removed .. '%*'
 		end
 	end
-	if b.lsp_icon then
-		left[#left + 1] = '%#' .. b.lsp_hl .. '#' .. b.lsp_icon .. '%*'
-	end
 	if b.recording then
 		right[#right + 1] = '%#StatusRecording# ' .. b.recording .. ' %*'
 	end
 	if b.diag_str then
 		right[#right + 1] = b.diag_str
 	end
+	if b.lsp_icon and b.lsp_icon ~= '' then
+		right[#right + 1] = '%#'
+			.. b.lsp_hl
+			.. '#'
+			.. b.lsp_icon
+			.. (b.lsp_name or '')
+			.. ' %*'
+	end
 
 	b.status_left = #left > 0 and table.concat(left) or ''
 	b.status_right = #right > 0 and table.concat(right) or ''
 end
 
---- LSP: one icon, three states.
 local lsp_icon = {
-	none = '  ',
+	none = '',
+	starting = '',
 	working = ' 󰄬 ',
 	ready = ' 󰄭  ',
 }
 local lsp_hl = {
 	none = 'StatusLspNone',
+	starting = 'StatusLspNone',
 	working = 'StatusLspWorking',
 	ready = 'StatusLspReady',
 }
@@ -138,12 +139,18 @@ local function refresh_lsp(buf)
 	local clients = vim.lsp.get_clients({ bufnr = buf })
 	if #clients == 0 then
 		state = 'none'
+		vim.b[buf].lsp_name = ''
 	else
+		local names = {}
 		for _, client in ipairs(clients) do
-			if active_progress[client.id] then
+			names[#names + 1] = client.name
+			local prog = active_progress[client.id]
+			if prog == 'working' then
 				state = 'working'
-				break
+			elseif prog == 'starting' and state ~= 'working' then
+				state = 'starting'
 			end
+			vim.b[buf].lsp_name = table.concat(names, '/')
 		end
 	end
 	vim.b[buf].lsp_icon = lsp_icon[state]
@@ -153,15 +160,32 @@ end
 
 vim.api.nvim_create_autocmd({ 'LspAttach', 'LspDetach' }, {
 	callback = function(ev)
+		if ev.event == 'LspAttach' then
+			local cid = ev.data.client_id
+			if not active_progress[cid] then
+				active_progress[cid] = 'starting'
+				vim.defer_fn(function()
+					if active_progress[cid] == 'starting' then
+						active_progress[cid] = nil
+						if vim.api.nvim_buf_is_valid(ev.buf) then
+							refresh_lsp(ev.buf)
+						end
+					end
+				end, 500) -- 500ms grace period to wait for LspProgress
+			end
+		elseif ev.event == 'LspDetach' then
+			active_progress[ev.data.client_id] = nil
+		end
 		refresh_lsp(ev.buf)
 	end,
 })
 
 vim.api.nvim_create_autocmd('LspProgress', {
 	callback = function(ev)
-		if ev.match == 'begin' or ev.match == 'report' then
-			active_progress[ev.data.client_id] = true
-		elseif ev.match == 'end' then
+		local kind = ev.data.params.value and ev.data.params.value.kind
+		if kind == 'begin' or kind == 'report' then
+			active_progress[ev.data.client_id] = 'working'
+		elseif kind == 'end' then
 			active_progress[ev.data.client_id] = nil
 		else
 			return
@@ -175,32 +199,41 @@ vim.api.nvim_create_autocmd('LspProgress', {
 	end,
 })
 
---- Git: resolved once per buffer, refreshed on save.
+local BRANCH_ICON = ' '
+
 local function refresh_branch(buf)
+	local file = vim.api.nvim_buf_get_name(buf)
+	if file == '' or vim.bo[buf].buftype ~= '' then
+		vim.b[buf].git_branch = ''
+		return
+	end
+	local cwd = vim.fs.root(buf, '.git') or vim.fs.dirname(file)
+
 	vim.system(
 		{ 'git', 'branch', '--show-current' },
-		{ text = true },
+		{ text = true, cwd = cwd },
 		vim.schedule_wrap(function(out)
 			if not vim.api.nvim_buf_is_valid(buf) then
 				return
 			end
-			vim.b[buf].git_branch = (out.code == 0 and out.stdout or ''):gsub(
-				'%s+',
-				''
-			)
+			local branch = (out.code == 0 and out.stdout or ''):gsub('%s+', '')
+			vim.b[buf].git_branch = branch ~= '' and (BRANCH_ICON .. branch)
+				or ''
 			refresh_status(buf)
 		end)
 	)
 end
 
 local function refresh_diff(buf)
-	local file = vim.fn.fnamemodify(vim.fn.bufname(buf), ':p')
-	if file == '' then
+	local file = vim.api.nvim_buf_get_name(buf)
+	if file == '' or vim.bo[buf].buftype ~= '' then
+		vim.b[buf].git_diff = nil
 		return
 	end
+	local cwd = vim.fs.root(buf, '.git') or vim.fs.dirname(file)
 	vim.system(
 		{ 'git', 'diff', '--numstat', 'HEAD', '--', file },
-		{ text = true },
+		{ text = true, cwd = cwd },
 		vim.schedule_wrap(function(out)
 			if not vim.api.nvim_buf_is_valid(buf) then
 				return
@@ -209,10 +242,14 @@ local function refresh_diff(buf)
 				vim.b[buf].git_diff = nil
 			else
 				local added, removed = out.stdout:match('(%d+)%s+(%d+)')
+				if added and removed then
 					vim.b[buf].git_diff = {
 						added = tonumber(added) or 0,
 						removed = tonumber(removed) or 0,
 					}
+				else
+					vim.b[buf].git_diff = nil
+				end
 			end
 			refresh_status(buf)
 		end)
@@ -266,11 +303,10 @@ vim.api.nvim_create_autocmd('BufWritePost', {
 	end,
 })
 
---- Macro: read once when recording starts, not on every redraw.
 vim.api.nvim_create_autocmd('RecordingEnter', {
 	pattern = '*',
 	callback = function(ev)
-		vim.b[ev.buf].recording = '● Rec @' .. vim.fn.reg_recording()
+		vim.b[ev.buf].recording = 'Rec @' .. vim.fn.reg_recording()
 		refresh_status(ev.buf)
 	end,
 })
@@ -293,7 +329,7 @@ function _G.__statusline()
 		b.status_left or '',
 		'%=',
 		b.status_right or '',
-		'%#StatusCursor# %l:%-2c %*',
+		'%#StatusCursor# %l:%c ',
 		'%#' .. hl .. '# %p%% %*',
 	})
 end