Merge pull request #61 from arcticicestudio/feature/gh-60-uniform-dif…

…f-background-config

Uniform diff background theme configuration

README.md

@@ -21,6 +21,7 @@ Nord Vim is a 16 colorspace theme build to run in GUI- and terminal mode with su
   - [Configuration](#configuration)
     - [Italic comments](#italic-comments)
     - [Comment contrast](#comment-contrast)
+    - [Uniform diff background](#uniform-diff-background)
   - [Plugin Support](#plugin-support)
     - [UI Plugins](#ui-plugins)
     - [Language Plugins](#language-plugins)
@@ -132,8 +133,20 @@ To adhere to the Nord style guide this option uses `nord3` by default.
 
 More information about true color and the support in various terminals can be found in [this gist][gist-true-color].
 
+### Uniform diff background
+By default, Nord Vim provides colorful backgrounds when used in *diff* mode `vimdiff`/`vim -d`.
+
+This can be changed to `nord1` as uniform *diff* background color by setting the `g:nord_uniform_diff_background` variable to `1`.
+
+```vim
+let g:nord_uniform_diff_background = 1
+```
+
+<align="center"><strong>Colorful backgrounds (default)</strong><br><img src="https://raw.githubusercontent.com/arcticicestudio/nord-vim/develop/assets/scrot-config-uniform-diff-default.png"/><br><strong>Uniform diff background</strong><br><img src="https://raw.githubusercontent.com/arcticicestudio/nord-vim/develop/assets/scrot-config-uniform-diff-default.png"/>
+</p>
+
 ## Plugin Support
-Nord Vim provides support for many third-party language- and the UI plugins.  
+Nord Vim provides support for many third-party language- and UI plugins.
 
 ### UI Plugins
 <p align="center"><a href="https://github.com/itchyny/lightline.vim">lightline</a><br><img src="https://raw.githubusercontent.com/arcticicestudio/nord-vim/develop/assets/scrot-plugin-support-ui-lightline.png"/><br><img src="https://raw.githubusercontent.com/arcticicestudio/nord-vim/develop/assets/scrot-plugin-support-ui-lightline-vsplit.png"/></p>

colors/nord.vim

@@ -80,6 +80,10 @@ if !exists("g:nord_comment_brightness")
   let g:nord_comment_brightness = 0
 endif
 
+if !exists("g:nord_uniform_diff_background")
+  let g:nord_uniform_diff_background = 0
+endif
+
 function! s:hi(group, guifg, guibg, ctermfg, ctermbg, attr, guisp)
   let l:attr = a:attr
   if g:nord_italic_comments == 0 && l:attr ==? 'italic'
@@ -262,15 +266,17 @@ hi! link dtDelim Delimiter
 hi! link dtLocaleValue Keyword
 hi! link dtTypeValue Keyword
 
-call s:hi("diffAdded", s:nord14_gui, "", s:nord14_term, "", "", "")
-call s:hi("diffChanged", s:nord13_gui, "", s:nord13_term, "", "", "")
-call s:hi("diffNewFile", s:nord8_gui, "", s:nord8_term, "", "", "")
-call s:hi("diffOldFile", s:nord7_gui, "", s:nord7_term, "", "", "")
-call s:hi("diffRemoved", s:nord11_gui, "", s:nord11_term, "", "", "")
-call s:hi("DiffAdd", s:nord14_gui, "", s:nord14_term, "", "", "")
-call s:hi("DiffChange", s:nord13_gui, "", s:nord13_term, "", "", "")
-call s:hi("DiffDelete", s:nord11_gui, "", s:nord11_term, "", "", "")
-call s:hi("DiffText", s:nord4_gui, "", "NONE", "", "", "")
+if g:nord_uniform_diff_background == 0
+  call s:hi("DiffAdd", s:nord14_gui, s:nord0_gui, s:nord14_term, "NONE", "inverse", "")
+  call s:hi("DiffChange", s:nord13_gui, s:nord0_gui, s:nord13_term, "NONE", "inverse", "")
+  call s:hi("DiffDelete", s:nord11_gui, s:nord0_gui, s:nord11_term, "NONE", "inverse", "")
+  call s:hi("DiffText", s:nord13_gui, s:nord0_gui, s:nord13_term, "NONE", "inverse", "")
+else
+  call s:hi("DiffAdd", s:nord14_gui, s:nord1_gui, s:nord14_term, s:nord1_term, "", "")
+  call s:hi("DiffChange", s:nord13_gui, s:nord1_gui, s:nord13_term, s:nord1_term, "", "")
+  call s:hi("DiffDelete", s:nord11_gui, s:nord1_gui, s:nord11_term, s:nord1_term, "", "")
+  call s:hi("DiffText", s:nord13_gui, s:nord1_gui, s:nord13_term, s:nord1_term, "", "")
+endif
 
 call s:hi("gitconfigVariable", s:nord7_gui, "", s:nord7_term, "", "", "")