vim/lualine: fix filename italics and refactor component extensions

config/nvim/lua/fschauen/lualine.lua

@@ -1,32 +1,29 @@
-local M = {}
+local filename = require('lualine.component'):extend()
 
-local window = require('fschauen.window')
+function filename:init(options)
+  filename.super.init(self, options)
 
-local colored_when_focused = function(component)
-  local new = require(component):extend()
-  function new:update_status(is_focused)
-    self.options.colored = is_focused
-    return self.super.update_status(self, is_focused)
-  end
-  return new
+  local color = options.color or {}
+  local modified = { gui = 'italic' }
+
+  self.custom_highlights = {   -- [is_focused, modified]
+    [true] = {
+      [true]  = self:create_hl(vim.tbl_extend('force', color, modified), 'focus_modified'),
+      [false] = self:create_hl(color, 'focus'),
+    },
+    [false] = {
+      [true]  = self:create_hl(modified, 'nofocus_modified'),
+      [false] = self:create_hl({}, 'nofocus'),
+    },
+  }
 end
 
-local diagnostics = colored_when_focused('lualine.components.diagnostics')
+function filename:update_status(is_focused)
+  self.options.color_highlight = self.custom_highlights[is_focused][vim.bo.modified]
 
-local branch = {
-  'branch',
-  icon = '',
-  cond = window.is_medium,
-}
+  local window = require 'fschauen.window'
+  local path = vim.fn.expand('%:~:.')
 
-local fileformat = {
-  'fileformat',
-  cond = window.is_medium,
-}
-
-local filename = {
-  function()
-    local shorten_path = function(path)
   if window.is_wide() then
     return path
   elseif window.is_medium() then
@@ -34,101 +31,70 @@ local filename = {
   else
     return vim.fn.fnamemodify(path, ':t')   -- only tail
   end
+end
+
+
+local mode = require('lualine.component'):extend()
+
+mode.map = {
+  ['n']  = '', -- 'Normal ', -- Normal
+  ['no'] = '', -- 'O-Pend ', -- Operator-pending
+  ['ni'] = '', -- 'Normal ', -- Normal via i_CTRL-O
+  ['v']  = '󰒉', -- 'Visual ', -- Visual by character
+  [''] = '󰩭', -- 'V-Block', -- Visual blockwise
+  ['s']  = '󰒉', -- 'Select ', -- Select by character
+  [''] = '󰩭', -- 'S-Block', -- Select blockwise
+  ['i']  = '', -- 'Insert ', -- Insert
+  ['r']  = '󰄾', -- 'Replace', -- Replace
+  ['rv'] = '󰶻', -- 'V-Repl ', -- Virtual Replace
+  ['c']  = '', -- 'Command', -- Command-line
+  ['cv'] = '', -- '  Ex   ', -- Ex mode
+  ['rm'] = '', -- ' modeore  ', -- -- modeORE --
+  ['r?'] = '󰭚', -- 'Confirm', -- :confirm
+  ['!']  = '', -- ' Shell ', -- External command executing
+  ['t']  = '', -- ' Term  ', -- Terminal
+}
+
+function mode:update_status(is_focused)
+  if is_focused then
+    local code = vim.api.nvim_get_mode().mode:lower()
+    local symbol = mode.map[code:sub(1, 2)] or mode.map[code:sub(1, 1)] or code
+    return ' ' .. symbol .. ' '
   end
 
-    return shorten_path(vim.fn.expand('%:~:.'))
-  end,
-
-  padding = { left = 1, right = 0 },
-}
-
-local filetype = {
-  colored_when_focused('lualine.components.filetype'),
-  cond = window.is_medium,
-}
-
-local mode = {
-  (function()
-    local MODES = {
-      ['n']  = '  ', -- 'Normal ', -- Normal
-      ['no'] = '  ', -- 'O-Pend ', -- Operator-pending
-      ['ni'] = '  ', -- 'Normal ', -- Normal via i_CTRL-O
-      ['v']  = ' 󰒉 ', -- 'Visual ', -- Visual by character
-      ['']  = ' 󰩭 ', -- 'V-Block', -- Visual blockwise
-      ['s']  = ' 󰒉 ', -- 'Select ', -- Select by character
-      ['']  = ' 󰩭 ', -- 'S-Block', -- Select blockwise
-      ['i']  = '  ', -- 'Insert ', -- Insert
-      ['r']  = ' 󰄾 ', -- 'Replace', -- Replace
-      ['rv'] = ' 󰶻 ', -- 'V-Repl ', -- Virtual Replace
-      ['c']  = '  ', -- 'Command', -- Command-line
-      ['cv'] = '  ', -- '  Ex   ', -- Ex mode
-      ['rm'] = '  ', -- ' More  ', -- -- MORE --
-      ['r?'] = ' 󰭚 ', -- 'Confirm', -- :confirm
-      ['!']  = '  ', -- ' Shell ', -- External command executing
-      ['t']  = '  ', -- ' Term  ', -- Terminal
-    }
-    return function()
-      local code = vim.api.nvim_get_mode().mode
-      return MODES[code:sub(1, 2):lower()] or MODES[code:sub(1, 1):lower()] or code
-    end
-  end)()
-}
-
-local mode_placeholder = {
-  function()
   return ' 󰒲 '
+end
+
+local colored_if_focused = function(component)
+  if type(component) == 'string' then
+    local c = require('lualine.components.' .. component):extend()
+
+    function c:update_status(is_focused)
+      self.options.colored = is_focused
+      return c.super.update_status(self, is_focused)
     end
-}
 
-local paste = {
-  function() return '' end,
-  color = { bg = '#fe8019' },
-  cond = function() return vim.opt.paste:get() end
-}
+    return c
+  elseif type(component) == 'function' then
+    local c = require('lualine.component'):extend()
 
-local paste_placeholder = {
-  function() return ' ' end,
-  cond = function() return vim.opt.paste:get() end
-}
+    function c:init(options)
+      c.super.init(self, options)
+      self.saved_hl = self.options.color_highlight
+    end
 
-local status = {
-  function()
-    local flags = vim.list_extend(
-      vim.bo.modified and { '✶' } or {},
-      (vim.bo.readonly or not vim.bo.modifiable) and { 'RO' } or {})
-    return vim.fn.join(flags, ' ')
-  end,
+    function c:update_status(is_focused)
+      self.options.color_highlight = is_focused and self.saved_hl or nil
+      return component(is_focused)
+    end
 
-  color = {
-    fg = '#f9f5d7',
-    gui = 'bold',
-  },
-}
-
-local visual_multi = function()
-  local info = vim.F.npcall(vim.fn.VMInfos)
-  if info and info.status then
-    return info.current .. '/' .. info.total .. ' ' .. info.status
-  else
-    return ''
+    return c
   end
 end
 
-local default = {
-  lualine_a = { paste_placeholder, mode_placeholder },
-  lualine_b = { visual_multi, branch },
-  lualine_c = { filename, status },
-  lualine_x = { diagnostics, filetype },
-  lualine_y = { fileformat, 'progress' },
-  lualine_z = { 'location' },
+return {
+  colored_if_focused = colored_if_focused,
+  filename = filename,
+  mode = mode,
 }
 
-M.sections = {
-  inactive = default,
-  active = vim.tbl_extend('force', default, {
-    lualine_a = { paste, mode },
-  })
-}
-
-return M
-

config/nvim/lua/fschauen/plugins/lualine.lua

@@ -1,7 +1,73 @@
 return {
   'nvim-lualine/lualine.nvim',
-  opts = function()
-    return {
+  config = function()
+    local window = require 'fschauen.window'
+    local colored_if_focused = require('fschauen.lualine').colored_if_focused
+
+    -- custom components
+    local C = {
+      diagnostics = {
+        colored_if_focused('diagnostics'),
+      },
+      diff = {
+        colored_if_focused('diff'),
+        symbols = {
+          added = '',
+          modified = '',
+          removed = '',
+        },
+      },
+      branch = {
+        'branch',
+        icon = '󰘬',
+        cond = window.is_medium,
+      },
+      fileformat = {
+        'fileformat',
+        cond = window.is_medium,
+      },
+      filename = {
+        require('fschauen.lualine').filename,
+        padding = {
+          left = 1,
+          right = 0,
+        },
+      },
+      filetype = {
+        colored_if_focused('filetype'),
+        cond = window.is_medium,
+      },
+      mode = require('fschauen.lualine').mode,
+      paste = {
+        colored_if_focused(function(has_focus) return has_focus and '' or ' ' end),
+        color = {
+          bg = '#fe8019',
+        },
+        cond = function() return vim.o.paste end
+      },
+      status = {
+        colored_if_focused(function(_)
+          local status = ''
+          if vim.bo.modified then status = status .. '' end
+          if vim.bo.readonly or not vim.bo.modifiable then status = status .. 'RO' end
+          return status
+        end),
+        color = {
+          fg = '#f9f5d7',
+        },
+      },
+    }
+
+    local sections = {
+      lualine_a = { C.paste, C.mode },
+      lualine_b = { C.branch },
+      lualine_c = { C.filename, C.status },
+      lualine_x = { C.diagnostics, C.filetype },
+      lualine_y = { C.fileformat, 'progress' },
+      lualine_z = { 'location' },
+    }
+
+    require('lualine').setup {
       options = {
         icons_enabled = true,
         component_separators = {
@@ -14,8 +80,8 @@ return {
         },
         theme = 'gruvbox',
       },
-      sections = require('fschauen.lualine').sections.active,
-      inactive_sections = require('fschauen.lualine').sections.inactive,
+      sections = sections,
+      inactive_sections = sections,
       extensions = {
         'fugitive',
         'quickfix',

config/nvim/lua/fschauen/plugins/visual-multi.lua.disabled

@@ -6,3 +6,14 @@ return {
   end,
 }
 
+
+-- Component for lualine:
+--  function()
+--    local info = vim.F.npcall(vim.fn.VMInfos)
+--    if info and info.status then
+--      return info.current .. '/' .. info.total .. ' ' .. info.status
+--    else
+--      return ''
+--    end
+--  end,
+