Merge branch 'master' into extensions

README.md

@@ -58,6 +58,9 @@ use {
 ```
 
 ## Usage and customization
+Lualine can be configured with both lua and vimscript.
+Click [here](#lua-config-example) if you want to see a config example in lua and [here](#vimscript-config-example) if you want to see a config example in vimscript.
+
 Lualine has sections as shown below.
 
 ```
@@ -69,8 +72,6 @@ Lualine has sections as shown below.
 Each sections holds it's components e.g. current vim's mode.
 Colorscheme of sections is mirrored, meaning section `A` will have the same colorscheme as section `Z` etc.
 
-Configuration is currently limited to lua, please use lua block or a separate lua file to configure lualine.
-
 ### Starting lualine
 ```lua
 local lualine = require('lualine')
@@ -131,7 +132,6 @@ lualine.inactive_sections = {
 <details>
 <summary><b>Available components</b></summary>
 
-* general
 * branch (git branch)
 * diagnostics (diagnostics count from your prefered source)
 * encoding (file encoding)
@@ -165,7 +165,7 @@ lualine.sections.lualine_a = { hello }
 
 You can use vim functions as a lualine component
 
-```
+```lua
 lualine.sections.lualine_b = { 'FugitiveHead' }
 ```
 
@@ -178,7 +178,7 @@ You can use variables from vim and lua globals as a lualine component
 Variables from g:, v:, t:, w:, b:, o, go:, vo:, to:, wo:, bo: scopes
 can be used. Scopes ending with o are options usualy accessed with `&` in vimscript
 
-```
+```lua
 lualine.sections.lualine_b = { 'g:coc_status', 'bo:filetype' }
 ```
 
@@ -274,6 +274,33 @@ lualine.sections.lualine_b = {
 
 </details>
 
+### Using tabline as statusline
+You can use lualine to display components in tabline . 
+The sections, configurations and highlights are same as statusline.
+
+```
+lualine.tabline = {
+  lualine_a = { },
+  lualine_b = { 'branch' },
+  lualine_c = { 'filename' },
+  lualine_x = { },
+  lualine_y = { },
+  lualine_z = { },
+}
+```
+This will show branch and filename component in top of neovim inside tabline .
+
+
+You can also completely move your statuline to tabline by configuring lualine.tabline
+instead of lualine.sections & lualine.inactive_sections and setting them to empty
+```
+lualine.tabline = {
+......
+  }
+lualine.sections = {}
+lualine.inactive_sections = {}
+```
+
 ### Loading plugin extensions
 Lualine extensions change statusline appearance for a window/buffer with a plugin loaded e.g. [junegunn/fzf.vim](https://github.com/junegunn/fzf.vim)
 
@@ -284,7 +311,7 @@ lualine.extensions = { 'fzf' }
 
 All available extensions are listed in [EXTENSIONS.md](./EXTENSIONS.md)
 
-### Full config example using [packer.nvim](https://github.com/wbthomason/packer.nvim)
+### Lua config example
 
 <details>
 <summary><b>packer config</b></summary>
@@ -294,69 +321,68 @@ All available extensions are listed in [EXTENSIONS.md](./EXTENSIONS.md)
     'hoob3rt/lualine.nvim',
     requires = {'kyazdani42/nvim-web-devicons', opt = true},
     config = function()
-      local lualine = require('lualine')
+      require('lualine').status{
-      lualine.options = {
+        options = {
           theme = 'gruvbox',
           section_separators = {'', ''},
           component_separators = {'', ''},
           icons_enabled = true,
-      }
+        },
-      lualine.sections = {
+        sections = {
-        lualine_a = { 'mode' },
+          lualine_a = { {'mode', upper = true} },
-        lualine_b = { 'branch' },
+          lualine_b = { {'branch', icon = ''} },
-        lualine_c = { 'filename' },
+          lualine_c = { {'filename', file_status = true} },
           lualine_x = { 'encoding', 'fileformat', 'filetype' },
           lualine_y = { 'progress' },
           lualine_z = { 'location'  },
-      }
+        },
-      lualine.inactive_sections = {
+        inactive_sections = {
           lualine_a = {  },
           lualine_b = {  },
           lualine_c = { 'filename' },
           lualine_x = { 'location' },
           lualine_y = {  },
           lualine_z = {   }
+        },
+        extensions = { 'fzf' }
       }
-      lualine.extensions = { 'fzf' }
-      lualine.status()
     end
   }
 ```
 
 </details>
 
-### Full config example inside `.vimrc`/`init.vim`
+### Vimscript config example
 
 <details>
 <summary><b>vimrc config</b></summary>
 
 ```vim
-lua << EOF
+let g:lualine = {
-local lualine = require('lualine')
+    \'options' : {
-    lualine.options = {
+    \  'theme' : 'gruvbox',
-      theme = 'gruvbox',
+    \  'section_separators' : ['', ''],
-      section_separators = {'', ''},
+    \  'component_separators' : ['', ''],
-      component_separators = {'', ''},
+    \  'icons_enabled' : v:true,
-      icons_enabled = true,
+    \},
-    }
+    \'sections' : {
-    lualine.sections = {
+    \  'lualine_a' : [ ['mode', {'upper': v:true,},], ],
-      lualine_a = { 'mode' },
+    \  'lualine_b' : [ ['branch', {'icon': '',}, ], ],
-      lualine_b = { 'branch' },
+    \  'lualine_c' : [ ['filename', {'file_status': v:true,},], ],
-      lualine_c = { 'filename' },
+    \  'lualine_x' : [ 'encoding', 'fileformat', 'filetype' ],
-      lualine_x = { 'encoding', 'fileformat', 'filetype' },
+    \  'lualine_y' : [ 'progress' ],
-      lualine_y = { 'progress' },
+    \  'lualine_z' : [ 'location'  ],
-      lualine_z = { 'location'  },
+    \},
-    }
+    \'inactive_sections' : {
-    lualine.inactive_sections = {
+    \  'lualine_a' : [  ],
-      lualine_a = {  },
+    \  'lualine_b' : [  ],
-      lualine_b = {  },
+    \  'lualine_c' : [ 'filename' ],
-      lualine_c = { 'filename' },
+    \  'lualine_x' : [ 'location' ],
-      lualine_x = { 'location' },
+    \  'lualine_y' : [  ],
-      lualine_y = {  },
+    \  'lualine_z' : [  ],
-      lualine_z = {   }
+    \},
-    }
+    \'extensions' : [ 'fzf' ],
-    lualine.extensions = { 'fzf' }
+    \}
-    lualine.status()
+lua require("lualine").status()
-EOF
 ```
 </details>

THEMES.md

@@ -2,6 +2,9 @@
 
 All available themes are only best effort ports by myself/ other users. If you find a theme to be weird/ wrong please open an issue/ pr.
 
+### auto
+if your favourite colorcheme is not yet supported you can use `auto` to make
+lualine try to match your colorscheme.
 ### 16color
 ![16normal_cropped](https://user-images.githubusercontent.com/41551030/108648240-02d2ae00-74bb-11eb-9ac1-495849621366.png)
 ![16insert_cropped](https://user-images.githubusercontent.com/41551030/108648219-f77f8280-74ba-11eb-84e4-978bf918c21f.png)

doc/lualine.txt

@@ -37,10 +37,11 @@ CONTENTS                                                     *lualine_contents*
         1.3.4. Changing components.................|lualine_changing_components|
         1.3.5. Building Custom components............|lualine_custom_components|
         1.3.6. Custom options...........................|lualine_custom_options|
-        1.3.7. Loading plugin extensions.....|lualine_loading_plugin_extensions|
+        1.3.7. Using tabline as statusline...............|lualine_using_tabline|
-	1.3.8  Config examples.........................|lualine_config_examples|
+        1.3.8. Loading plugin extensions.....|lualine_loading_plugin_extensions|
-	    1.3.8.1. Packer.nvim......|lualine_config_example_using_packer.nvim|
+        1.3.9  Config examples.........................|lualine_config_examples|
-            1.3.8.2 VIML example.......|lualine_full_config_example_inside_viml|
+            1.3.9.1. Packer.nvim......|lualine_config_example_using_packer.nvim|
+            1.3.9.2 VIML example.......|lualine_full_config_example_inside_viml|
     1.4. Contributing.....................................|lualine_contributing|
     1.5. Screenshots.......................................|lualine_screenshots|
 
@@ -376,7 +377,34 @@ Example:~
       end
     }
   }
+-------------------------------------------------------------------------------
+USING TABLINE AS STATUSLINE                              *lualine_using_tabline*
+
+You can use lualine to display components in tabline .
+The sections, configurations and highlights are same as statusline.
+
+>
+    lualine.tabline = {
+      lualine_a = { },
+      lualine_b = { 'branch' },
+      lualine_c = { 'filename' },
+      lualine_x = { },
+      lualine_y = { },
+      lualine_z = { },
+    }
 <
+This will show branch and filename component in top of neovim inside tabline .
+
+You can also completely move your statuline to tabline by configuring lualine.tabline
+instead of lualine.sections & lualine.inactive_sections and setting them to empty
+>
+    lualine.tabline = {
+    ......
+      }
+    lualine.sections = {}
+    lualine.inactive_sections = {}
+<
+
 
 --------------------------------------------------------------------------------
 LOADING PLUGIN EXTENSIONS                    *lualine_loading_plugin_extensions*
@@ -404,31 +432,31 @@ packer config
         'hoob3rt/lualine.nvim',
         requires = {'kyazdani42/nvim-web-devicons', opt = true},
         config = function()
-          local lualine = require('lualine')
+        require('lualine').status{
-	  lualine.options = {
+            options = {
               theme = 'gruvbox',
               section_separators = {'', ''},
               component_separators = {'', ''},
               icons_enabled = true,
-	  }
+            },
-          lualine.sections = {
+            sections = {
-            lualine_a = { 'mode' },
+              lualine_a = { {'mode', upper = true} },
-            lualine_b = { 'branch' },
+              lualine_b = { {'branch', icon = ''} },
-            lualine_c = { 'filename' },
+              lualine_c = { {'filename', file_status = true} },
               lualine_x = { 'encoding', 'fileformat', 'filetype' },
               lualine_y = { 'progress' },
               lualine_z = { 'location'  },
-          }
+            },
-          lualine.inactive_sections = {
+            inactive_sections = {
               lualine_a = {  },
               lualine_b = {  },
               lualine_c = { 'filename' },
               lualine_x = { 'location' },
               lualine_y = {  },
               lualine_z = {   }
+            },
+            extensions = { 'fzf' }
           }
-          lualine.extensions = { 'fzf' }
-          lualine.status()
         end
       }
 <
@@ -440,33 +468,32 @@ FULL CONFIG EXAMPLE INSIDE VIML        *lualine_full_config_example_inside_viml*
 
 vimrc config
 >
-    lua << EOF
+    let g:lualine = {
-    local lualine = require('lualine')
+        \'options' : {
-        lualine.options = {
+        \  'theme' : 'gruvbox',
-          theme = 'gruvbox',
+        \  'section_separators' : ['', ''],
-	    section_separators = {'', ''},
+        \  'component_separators' : ['', ''],
-	    component_separators = {'', ''},
+        \  'icons_enabled' : v:true,
-	    icons_enabled = true,
+        \},
-	  }
+        \'sections' : {
-        lualine.sections = {
+        \  'lualine_a' : [ ['mode', {'upper': v:true,},], ],
-          lualine_a = { 'mode' },
+        \  'lualine_b' : [ ['branch', {'icon': '',}, ], ],
-          lualine_b = { 'branch' },
+        \  'lualine_c' : [ ['filename', {'file_status': v:true,},], ],
-          lualine_c = { 'filename' },
+        \  'lualine_x' : [ 'encoding', 'fileformat', 'filetype' ],
-          lualine_x = { 'encoding', 'fileformat', 'filetype' },
+        \  'lualine_y' : [ 'progress' ],
-          lualine_y = { 'progress' },
+        \  'lualine_z' : [ 'location'  ],
-          lualine_z = { 'location'  },
+        \},
-        }
+        \'inactive_sections' : {
-        lualine.inactive_sections = {
+        \  'lualine_a' : [  ],
-          lualine_a = {  },
+        \  'lualine_b' : [  ],
-          lualine_b = {  },
+        \  'lualine_c' : [ 'filename' ],
-          lualine_c = { 'filename' },
+        \  'lualine_x' : [ 'location' ],
-          lualine_x = { 'location' },
+        \  'lualine_y' : [  ],
-          lualine_y = {  },
+        \  'lualine_z' : [  ],
-          lualine_z = {   }
+        \},
-        }
+        \'extensions' : [ 'fzf' ],
-        lualine.extensions = { 'fzf' }
+        \}
-        lualine.status()
+    lua require("lualine").status()
-    EOF
 <
 
 --------------------------------------------------------------------------------

doc/tags

@@ -19,4 +19,5 @@ lualine_screenshots	lualine.txt	/*lualine_screenshots*
 lualine_setting_theme	lualine.txt	/*lualine_setting_theme*
 lualine_starting_lualine	lualine.txt	/*lualine_starting_lualine*
 lualine_usage_and_customization	lualine.txt	/*lualine_usage_and_customization*
+lualine_using_tabline	lualine.txt	/*lualine_using_tabline*
 lualine_vim-plug	lualine.txt	/*lualine_vim-plug*

lua/lualine.lua

@@ -35,6 +35,8 @@ M.inactive_sections = {
   lualine_z = {  }
 }
 
+M.tabline = {}
+
 M.extensions = {}
 
 local function apply_configuration(config_table)
@@ -59,6 +61,7 @@ local function apply_configuration(config_table)
   parse_sections('options')
   parse_sections('sections')
   parse_sections('inactive_sections')
+  parse_sections('tabline')
   if config_table.extensions then M.extensions = config_table.extensions end
 end
 
@@ -167,6 +170,7 @@ end
 local function load_components()
   load_sections(M.sections)
   load_sections(M.inactive_sections)
+  load_sections(M.tabline)
 end
 
 local function  load_extensions()
@@ -297,25 +301,49 @@ local function status_dispatch()
   end
 end
 
-local function exec_autocommands()
+local function tabline()
+  return statusline(M.tabline, true)
+end
+
+local function setup_theme()
+  lualine_set_theme()
   _G.lualine_set_theme = lualine_set_theme
-  _G.lualine_statusline = status_dispatch
   vim.api.nvim_exec([[
   augroup lualine
   autocmd!
   autocmd ColorScheme * call v:lua.lualine_set_theme()
-  autocmd WinLeave,BufLeave * lua vim.wo.statusline=lualine_statusline()
-  autocmd WinEnter,BufEnter * setlocal statusline=%!v:lua.lualine_statusline()
   augroup END
   ]], false)
 end
 
-function M.status()
+local function set_tabline()
+  if next(M.tabline) ~= nil then
+    _G.lualine_tabline = tabline
+    vim.o.tabline = '%!v:lua.lualine_tabline()'
+    vim.o.showtabline = 2
+  end
+end
+
+local function set_statusline()
+  if next(M.sections) ~= nil or next(M.inactive_sections) ~= nil then
+    _G.lualine_statusline = status_dispatch
+    vim.o.statusline = '%!v:lua.lualine_statusline()'
+    vim.api.nvim_exec([[
+    autocmd lualine WinLeave,BufLeave * lua vim.wo.statusline=lualine_statusline()
+    autocmd lualine WinEnter,BufEnter * setlocal statusline=%!v:lua.lualine_statusline()
+    ]], false)
+  end
+end
+
+function M.status(config)
+  apply_configuration(vim.g.lualine)
+  apply_configuration(config)
   check_single_separator()
-  lualine_set_theme()
+  setup_theme()
-  exec_autocommands()
   load_components()
   load_extensions()
+  set_statusline()
+  set_tabline()
 end
 
 return M

lua/lualine/themes/auto.lua

@@ -0,0 +1,163 @@
+local utils = require'lualine.utils.utils'
+
+---------------
+-- Constents --
+---------------
+-- fg and bg must have this much contrast range 0 < contrast_threshold < 0.5
+local contrast_threshold = 0.3
+-- how much brightness is changed in percentage for light and dark themes
+local brightness_modifier_parameter = 10
+
+-- retrives color value from highlight group name in syntax_list
+-- first present highlight is returned
+local function getHi( scope, syntaxlist )
+  for _ , highlight_name in pairs( syntaxlist  ) do
+    if vim.fn.hlexists(highlight_name) ~= 0 then
+      local color = utils.extract_highlight_colors(highlight_name)
+      if color.reverse then
+        if scope == 'guibg' then scope = 'guifg' else scope = 'guibg' end
+      end
+      if color[scope] then return color[scope] end
+    end
+  end
+  return '#000000'
+end
+
+-- truns #rrggbb -> { red, green, blue }
+local function rgb_str2num(rgb_color_str)
+  if rgb_color_str:find('#') == 1 then rgb_color_str = rgb_color_str:sub(2, #rgb_color_str) end
+  local red = tonumber(rgb_color_str:sub(1,2), 16)
+  local green = tonumber(rgb_color_str:sub(3,4), 16)
+  local blue = tonumber(rgb_color_str:sub(5,6), 16)
+  return { red = red, green = green, blue = blue, }
+end
+
+-- turns { red, green, blue } -> #rrggbb
+local function rgb_num2str(rgb_color_num)
+  local rgb_color_str = string.format('#%02x%02x%02x', rgb_color_num.red,
+    rgb_color_num.green, rgb_color_num.blue)
+  return rgb_color_str
+end
+
+-- returns brightness lavel of color in range 0 to 1
+-- arbitary value it's basicaly an weighted average
+local function get_color_brightness(rgb_color)
+  local color = rgb_str2num(rgb_color)
+  local brightness = (color.red * 2 + color.green * 3 + color.blue) / 6
+  return brightness / 256
+end
+
+-- returns average of colors in range 0 to 1
+-- used to ditermine contrast lavel
+local function get_color_avg(rgb_color)
+  local color = rgb_str2num(rgb_color)
+  return (color.red + color.green + color.blue) / 3 / 256
+end
+
+-- clamps the val between left and right
+local function clamp(val, left, right)
+  if val > right then return right end
+  if val < left then return left end
+  return val
+end
+
+-- changes braghtness of rgb_color by percentage
+local function brightness_modifier(rgb_color, parcentage)
+  local color = rgb_str2num(rgb_color)
+  color.red = clamp(color.red + (color.red * parcentage / 100), 0, 255)
+  color.green = clamp(color.green + (color.green * parcentage / 100), 0, 255)
+  color.blue = clamp(color.blue + (color.blue * parcentage / 100), 0, 255)
+  return rgb_num2str(color)
+end
+
+-- changes contrast of rgb_color by amount
+local function contrast_modifier(rgb_color, amount)
+  local color = rgb_str2num(rgb_color)
+  color.red = clamp(color.red + amount, 0, 255)
+  color.green = clamp(color.green + amount, 0, 255)
+  color.blue = clamp(color.blue + amount, 0, 255)
+  return rgb_num2str(color)
+end
+
+-- Changes brightness of foreground color to achive contrast
+-- without changing the color
+local function apply_contrast(highlight)
+  local hightlight_bg_avg = get_color_avg(highlight.bg)
+  local contrast_threshold_config = clamp(contrast_threshold, 0, 0.5)
+  local contranst_change_step = 5
+  if hightlight_bg_avg > .5 then
+    contranst_change_step = -contranst_change_step
+  end
+
+  -- donn't waste too much time here max 25 interation should be more than enough
+  local iteration_count = 1
+  while (math.abs(get_color_avg(highlight.fg) - hightlight_bg_avg) < contrast_threshold_config and iteration_count < 25) do
+    highlight.fg = contrast_modifier(highlight.fg, contranst_change_step)
+    iteration_count = iteration_count + 1
+  end
+end
+
+-- Get the colors to create theme
+local colors = {
+  normal  = getHi( 'guibg', {'PmenuSel', 'PmenuThumb', 'TabLineSel' } ),
+  insert  = getHi( 'guifg', {'String', 'MoreMsg' } ),
+  replace = getHi( 'guifg', {'Number', 'Type' } ),
+  visual  = getHi( 'guifg', {'Special', 'Boolean', 'Constant' } ),
+  command = getHi( 'guifg', {'Identifier' } ),
+  back1   = getHi( 'guibg', {'Normal', 'StatusLineNC' } ),
+  fore    = getHi( 'guifg', {'Normal', 'StatusLine' } ),
+  back2   = getHi( 'guibg', {'StatusLine' } ),
+}
+
+
+-- Change brightness of colors
+-- darken incase of light theme lighten incase of dark theme
+
+if get_color_brightness(utils.extract_highlight_colors('Normal', 'guibg')) > 0.5 then
+  brightness_modifier_parameter = -brightness_modifier_parameter
+end
+
+for name, color in pairs(colors) do
+  colors[name] = brightness_modifier(color, brightness_modifier_parameter)
+end
+
+-- basic theme defination
+local M = {
+  normal = {
+    a = { bg = colors.normal,  fg = colors.back1, gui='bold' },
+    b = { bg = colors.back1,   fg = colors.normal            },
+    c = { bg = colors.back2,   fg = colors.fore              },
+  },
+  insert = {
+    a = { bg = colors.insert,  fg = colors.back1, gui='bold' },
+    b = { bg = colors.back1,   fg = colors.insert            },
+    c = { bg = colors.back2,   fg = colors.fore              },
+  },
+  replace = {
+    a = { bg = colors.replace, fg= colors.back1, gui='bold' },
+    b = { bg = colors.back1,   fg= colors.replace           },
+    c = { bg = colors.back2,   fg= colors.fore              },
+  },
+  visual = {
+    a = { bg = colors.visual,  fg= colors.back1, gui='bold' },
+    b = { bg = colors.back1,   fg= colors.visual            },
+    c = { bg = colors.back2,   fg= colors.fore              },
+  },
+  command = {
+    a = { bg = colors.command, fg = colors.back1, gui='bold' },
+    b = { bg = colors.back1,   fg = colors.command           },
+    c = { bg = colors.back2,   fg = colors.fore              },
+  },
+}
+
+M.terminal = M.command
+M.inactive = M.normal
+
+-- Apply prpper contrast so text is readable
+for _, section in pairs(M) do
+  for _, highlight in pairs(section) do
+    apply_contrast(highlight)
+  end
+end
+
+return M