feat: add colors to signify (#61)

Co-authored-by: hoob3rt <pelczarskihubert@gmail.com>

README.md

@@ -244,6 +244,17 @@ Default options act as default for all components
 - fileformat
   - icons_enabled (true)\
    Whether to displays icon before component
+- signify
+  - colored        (true)\
+    Whether to show colors. Colors are automaticaly
+		extracted from colorscheme . If you want to change
+		any of those you can use options given below.
+  - color_added    ('#90ee90')\
+    Foreground color of added section
+  - color_modified ('#f0e130')\
+    Foreground color of modified section
+  - color_removed  ('#ff0038')\
+    Foreground color of removed section
 
 **Example:**
 ```lua

doc/lualine.txt

@@ -1,5 +1,4 @@
-*lualine.txt*
-						        *lualine* *lualine.nvim*
+lualine.txt			    	             *lualine-nvim*   *lualine*
 
 Author: hoob3rt (https://github.com/hoob3rt)
 License: MIT License
@@ -279,7 +278,23 @@ List of options are given below.
 
   • fileformat~
     • icons_enabled (true)
-      Whether to displays icon before component
+      Whether to displays icon before component. Colors
+      are automaticaly extracted from colorscheme . If you
+      want to change any of those you can use options given below.
+
+
+  • signify~
+    • colored (true)
+      Whether to show colors
+
+    • color_added ('#90ee90')
+      Foreground color of added section
+
+    • color_modified ('#f0e130')
+      Foreground color of modified section
+
+    • color_removed ('#ff0038')
+      Foreground color of removed section
 
 Example:~
 >

doc/tags

@@ -18,6 +18,4 @@ lualine-setting_a_theme	lualine.txt	/*lualine-setting_a_theme*
 lualine-starting_lualine	lualine.txt	/*lualine-starting_lualine*
 lualine-usage_and_customization	lualine.txt	/*lualine-usage_and_customization*
 lualine-vim-plug	lualine.txt	/*lualine-vim-plug*
-lualine.nvim	lualine.txt	/*lualine.nvim*
-lualine.txt	lualine.txt	/*lualine.txt*
 lualline-contents	lualine.txt	/*lualline-contents*

lua/lualine/components/signify.lua

@@ -1,33 +1,77 @@
--- Copyright (c) 2020-2021 hoob3rt
+-- Copyright (c) 2020-2021 shadmansaleh
 -- MIT license, see LICENSE for more details.
 
-local function signify()
+local utils = require'lualine.utils.utils'
+local highlight = require"lualine.highlight"
+
+local default_color_added    = "#f0e130"
+local default_color_removed  = "#90ee90"
+local default_color_modified = "#ff0038"
+
+local function signify(options)
+  if options.colored == nil then options.colored = true end
+  -- apply colors
+  if not options.color_added then
+    options.color_added = utils.extract_highlight_colors('diffAdded', 'foreground') or default_color_added
+  end
+  if not options.color_modified then
+    options.color_modified = utils.extract_highlight_colors('diffChanged', 'foreground') or default_color_modified
+  end
+  if not options.color_removed then
+    options.color_removed = utils.extract_highlight_colors('diffRemoved', 'foreground') or default_color_removed
+  end
+
+  local highlights = {}
+
+  -- create highlights and save highlight_name in highlights table
+  local function create_highlights()
+    highlights = {
+      highlight.create_component_highlight_group({fg = options.color_added}, 'signify_added', options),
+      highlight.create_component_highlight_group({fg = options.color_modified}, 'signify_modified', options),
+      highlight.create_component_highlight_group({fg = options.color_removed}, 'signify_removed', options),
+    }
+  end
+
+  -- create highlights
+  if options.colored then
+    create_highlights()
+    utils.expand_set_theme(create_highlights)
+    options.custom_highlight = true
+  end
+
+  -- Function that runs everytime statusline is updated
+  return function()
+    -- check if signify is available
     if vim.fn.exists('*sy#repo#get_stats') == 0 then return '' end
-   local added, modified, removed = unpack(vim.fn['sy#repo#get_stats']())
-   if added == -1 then return '' end
-   local symbols = {
-     '+',
-     '-',
-     '~',
-   }
-   local result = {}
-   local data = {
-    added,
-    removed,
-    modified,
-   }
-   for range=1,3 do
-     if data[range] ~= nil and data[range] > 0
-       then table.insert(result,symbols[range]..''..data[range]..' ')
+    local data = vim.fn['sy#repo#get_stats']()
+    if data[1] == -1 then return '' end
+
+    local symbols = {'+', '~', '-'}
+    local colors = {}
+    if options.colored then
+      -- load the highlights and store them in colors table
+      for _, highlight_name in ipairs(highlights) do
+        table.insert(colors, highlight.component_format_highlight(highlight_name))
       end
     end
 
+    local result = {}
+    -- loop though data and load available sections in result table
+    for range=1,3 do
+      if data[range] ~= nil and data[range] > 0 then
+        if options.colored then
+          table.insert(result,colors[range]..symbols[range]..data[range])
+        else
+          table.insert(result,symbols[range]..data[range])
+        end
+      end
+    end
     if result[1] ~= nil then
-       return table.concat(result, '')
+      return table.concat(result, ' ')
     else
       return ''
     end
+  end
 end
 
-
-return signify
+return { init = function(options) return signify(options) end }

lua/lualine/utils/utils.lua

@@ -14,4 +14,10 @@ function M.expand_set_theme(func)
   end
 end
 
+-- Note for now only works for termguicolors scope can be background or foreground
+function M.extract_highlight_colors(color_group, scope)
+  local color = string.format('#%06x', vim.api.nvim_get_hl_by_name(color_group, true)[scope])
+  return color or nil
+end
+
 return M