Port custom statusline from vimscript & change colors

init.lua

@@ -3,6 +3,7 @@ require('mappings')
 require('netrw')
 require('autocmds')
 require('build')
+require('statusline')
 
 local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
 if not vim.loop.fs_stat(lazypath) then

lua/plugins/statusline.lua

@@ -1,20 +0,0 @@
-return {
-  'ojroques/nvim-hardline',
-  config = function()
-    require('hardline').setup({
-      sections = {
-        { class = 'mode', item = require('hardline.parts.mode').get_item },
-        -- { class = 'high', item = require('hardline.parts.git').get_item,     hide = 100 },
-        { class = 'med',  item = require('hardline.parts.filename').get_item },
-        '%<',
-        { class = 'med',     item = '%=' },
-        { class = 'low',     item = require('hardline.parts.wordcount').get_item, hide = 100 },
-        { class = 'error',   item = require('hardline.parts.lsp').get_error },
-        { class = 'warning', item = require('hardline.parts.lsp').get_warning },
-        { class = 'warning', item = require('hardline.parts.whitespace').get_item },
-        { class = 'high',    item = require('hardline.parts.filetype').get_item,  hide = 60 },
-        { class = 'mode',    item = require('hardline.parts.line').get_item },
-      }
-    })
-  end
-}

lua/statusline.lua

@@ -0,0 +1,185 @@
+local statusline = {}
+
+local theme = {
+  light_green  = { fg = '#262626', bg = '#59946f' },
+  light_blue   = { fg = '#262626', bg = '#5c91bf' },
+  light_orange = { fg = '#262626', bg = '#b6927b' },
+  light_red    = { fg = '#262626', bg = '#e46876' },
+  light_grey   = { fg = '#262626', bg = '#808080' },
+  light_violet = { fg = '#262626', bg = '#957fb8' },
+  dark_white   = { fg = '#ffffff', bg = '#121212' },
+  dark_yellow  = { fg = '#c4b28a', bg = '#121212' },
+  dark_grey    = { fg = '#808080', bg = '#121212' },
+}
+
+local modes = {}
+modes[110]  = { name = 'Normal', color = 'light_green' }
+modes[105]  = { name = 'Insert', color = 'light_blue' }
+modes[99]   = { name = 'Command', color = 'light_green' }
+modes[118]  = { name = 'Visual', color = 'light_violet' }
+modes[86]   = { name = 'V-Line', color = 'light_violet' }
+modes[22]   = { name = 'V-Block', color = 'light_violet' }
+modes[82]   = { name = 'Replace', color = 'light_red' }
+modes[115]  = { name = 'Select', color = 'light_orange' }
+modes[83]   = { name = 'S-Line', color = 'light_orange' }
+modes[19]   = { name = 'S-Block', color = 'light_orange' }
+modes[116]  = { name = 'Terminal', color = 'light_blue' }
+modes[33]   = { name = 'Shell', color = 'light_grey' }
+
+local function highlight(group, color, attrs)
+  local command = 'highlight ' .. group ..
+      ' guifg=' .. color.fg .. ' guibg=' .. color.bg
+  if attrs then
+    command = command .. ' gui=' .. attrs
+  end
+  vim.cmd(command)
+end
+
+-- StatusLineLight is shows the mode and cursor information, it is dynamically
+-- changed by statusline#mode(), give it a default.
+highlight('StatusLineLight', theme.light_grey)
+-- StatusLineDusk is shows additional information which is not always present,
+-- give it a muted color.
+highlight('StatusLineDusk', theme.light_grey, 'bold')
+-- StatusLineDark shows the filename and filetype and takes up most of the
+-- statusline, give it a dark background.
+highlight('StatusLineDark', theme.dark_white)
+-- StatusLineChange shows changes in the file by changing the colour of the
+-- filename, give if a dark background.
+highlight('StatusLineChange', theme.dark_yellow)
+-- StatusLineFade shows the status of completion engines but using colors which
+-- fade into the background to avoid grabbing attention.
+highlight('StatusLineDuskFade', theme.dark_grey)
+
+-- Get statusline mode and update StatusLineLight.
+local function get_mode()
+  -- Map modes to a human readable name and a color.
+  local current_mode = modes[vim.fn.char2nr(vim.fn.mode())]
+  -- Update the StatusLineLight color.
+  highlight('StatusLineLight', theme[current_mode.color], 'bold')
+  return current_mode.name
+end
+
+-- Construct a statusline for special buffer types.
+local function special(group, name, title)
+  -- Display current mode with dynamic highlights.
+  local line = '%#' .. group .. '# ' .. name .. ' '
+  -- Display filename with dark highlights.
+  line = line .. '%#StatusLineDark# ' .. title
+  -- Display current/total lines and column with dynamic highlights.
+  line = line .. '%=' .. '%#' .. group .. '# ☰%l/%L ·%2c '
+  -- Combine the elements into a single string to be evaluated.
+  return line
+end
+
+-- Construct a statusline for generic buffer types.
+local function generic(group, name, show_lsp)
+  -- Display current mode with dynamic highlights.
+  local line = '%#' .. group .. '# ' .. name .. ' '
+  -- Display spell or paste if set with dusk highlights in a group to swallow
+  -- the spaces when empty.
+  line = line .. '%#StatusLineDusk#%( ' .. '%{&spell ? "Spell " : ""}' ..
+      '%{&paste ? "Paste " : ""}' .. '%)'
+  -- Display filename with dark or changed highlights.
+  if vim.o.modified then
+    line = line .. '%#StatusLineChange#'
+  else
+    line = line .. '%#StatusLineDark#'
+  end
+  line = line .. ' %<%f'
+  -- Display readonly and nomodifiable if set.
+  line = line
+      .. '%#StatusLineDark#'
+      .. '%{&readonly ? " 🔒" : ""}'
+      .. '%{&modifiable ? "" : " ⛔"}'
+  -- FIXME: if show_lsp and vim.fn.exists('*coc#status') then
+  --   -- Display LSP status.
+  --   line = line .. '%#StatusLineDuskFade#%( %{coc#status()}%)'
+  -- end
+  -- Display filetype if set.
+  line = line .. '%=' .. '%#StatusLineDark# %{&filetype} '
+  -- Display fileencoding if not utf-8 and fileformat if not unix with dusk
+  -- highlights in a group to swallow spaces when empty.
+  line = line .. '%#StatusLineDusk#%( ' ..
+      '%{&fileencoding ==# "utf-8" ? "" : &fileencoding}' ..
+      '%{&fileformat ==# "unix" ? "" : "[".&fileformat."]"}' .. ' %)'
+  -- Display current/total lines and column with dynamic highlights.
+  line = line .. '%#' .. group .. '# ☰ %l/%L 󰠷 %2c '
+  -- Combine the elements into a single string to be evaluated.
+  return line
+end
+
+-- Define active statusline, this statusline is dynamic with StatusLineLight
+-- being updated based on the current mode and only used for current buffer.
+function statusline.active()
+  local mode = get_mode()
+  if vim.o.buftype == 'help' then
+    if mode == 'Normal' then mode = 'Help' end
+    return special('StatusLineDusk', 'Help', '%F')
+  elseif vim.o.buftype == 'quickfix' then
+    -- Quickfix list and location list have the same buftype, the window has a
+    -- loclist flag, query the window info.
+    local info = vim.fn.getwininfo(vim.fn.win_getid())[1]
+    if mode == 'Normal' then
+      if info.loclist then mode = 'Location' else mode = 'Quickfix' end
+    end
+    local title = info.variables.quickfix_title
+    return special('StatusLineLight', mode, title)
+  elseif vim.o.buftype == 'terminal' then
+    return special('StatusLineLight', 'Terminal', '%f')
+  elseif vim.o.previewwindow then
+    if mode == 'Normal' then mode = 'Preview' end
+    return generic('StatusLineLight', mode, false)
+  elseif vim.o.filetype == 'man' then
+    return special('StatusLineDusk', 'Manual', '%f')
+  end
+  return generic('StatusLineLight', mode, true)
+end
+
+function statusline.inactive()
+  local mode = modes[vim.fn.char2nr(vim.fn.mode())].name
+  local line = ''
+  if vim.o.buftype == 'help' then
+    line = special('StatusLineDusk', 'Help', '%F')
+  elseif vim.o.buftype == 'quickfix' then
+    -- Quickfix list and location list have the same buftype, the window has a
+    -- loclist flag, query the window info.
+    local info = vim.fn.getwininfo(vim.fn.win_getid())[1]
+    if info['loclist'] then mode = 'Location' else mode = 'Quickfix' end
+    line = special('StatusLineDusk', mode, info.variables.quickfix_title)
+  elseif vim.o.buftype == 'terminal' then
+    line = special('StatusLineDusk', 'Terminal', '%f')
+  elseif vim.o.previewwindow then
+    line = generic('StatusLineDusk', 'Preview', false)
+  elseif vim.o.filetype == 'man' then
+    line = special('StatusLineDusk', 'Manual', '%f')
+  else
+    line = generic('StatusLineDusk', 'Idle', false)
+  end
+  -- Escape spaces and double quotes for use in setlocal.
+  -- FIXME: let l:statusline = substitute(l:statusline, '\([ "]\)', '\\\0', 'g')
+  return line
+end
+
+-- Setup autocmds to set the statusline per buffer.
+local group = vim.api.nvim_create_augroup('statusline', { clear = true })
+-- Dynamically update the current buffer mode and color changes using %! to
+-- call a function which is always evaluated on statusline update.
+vim.api.nvim_create_autocmd({ 'BufEnter', 'WinEnter', 'BufWinEnter' }, {
+  pattern = '*',
+  group = group,
+  callback = function()
+    vim.cmd [[ setlocal statusline=%{%v:lua.require('statusline').active()%} ]]
+  end
+})
+
+-- Statically set the statusline when leaving the buffer.
+vim.api.nvim_create_autocmd({ 'BufLeave', 'WinLeave' }, {
+  pattern = '*',
+  group = group,
+  callback = function()
+    vim.cmd [[ setlocal statusline=%{%v:lua.require('statusline').inactive()%} ]]
+  end
+})
+
+return statusline