From 6ef2556ae020a8d04ee6e3b75d6df82bb2d9f6e1 Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Sat, 9 Oct 2021 23:14:43 +0200
Subject: Initial release.

---
 README.md                       |  33 +++++++++++++++++++++++
 doc/vim-under-the-cursor.txt    |  12 +++++++++
 plugin/vim-under-the-cursor.vim |  57 ++++++++++++++++++++++++++++++++++++++++
 screenshot.png                  | Bin 0 -> 82527 bytes
 4 files changed, 102 insertions(+)
 create mode 100644 README.md
 create mode 100644 doc/vim-under-the-cursor.txt
 create mode 100644 plugin/vim-under-the-cursor.vim
 create mode 100644 screenshot.png

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,33 @@
+# vim-under-the-cursor
+
+Underlines all occurances of the word under the cursor and additionally
+displays the color under the cursor if it is written as a hex value. The
+alpha-channel (#rgba colors) is also supported and changes the brightness of
+colors.
+
+![screenshot](/screenshot.png)
+
+## Installation
+
+This should be sufficient:
+
+    git clone https://git.entwicklerseite.de/vim-under-the-cursor \
+        ~/.vim/pack/coderonline/start/vim-under-the-cursor
+
+Or as submodule:
+
+    git submodule add https://git.entwicklerseite.de/vim-under-the-cursor \
+        ~/.vim/pack/coderonline/start/vim-under-the-cursor
+
+Or download the zip file and extract it under `~/.vim/pack/coderonline/start/`.
+
+## Installation using plugin managers
+
+### vim-plug
+
+    Plug 'coderonline/vim-under-the-cursor'
+
+### dein.vim
+
+    call dein#add('coderonline/vim-under-the-cursor')
+
diff --git a/doc/vim-under-the-cursor.txt b/doc/vim-under-the-cursor.txt
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+++ b/doc/vim-under-the-cursor.txt
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+*vim-under-the-cursor.txt*  Highlight the word under the cursor and colors
+
+==============================================================================
+USAGE INSTRUCTIONS                                      *vim-under-the-cursor*
+
+This plugin should work out of the box and does not require dedicated
+configuration, however your Vim must use GUI colors for it to work. These
+can be activated with 
+
+  :set termguicolors
+
+vim:tw=78:ts=8:ft=help:norl:
diff --git a/plugin/vim-under-the-cursor.vim b/plugin/vim-under-the-cursor.vim
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index 0000000..403164a
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+++ b/plugin/vim-under-the-cursor.vim
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+"=======================================================================================================================
+" HIGHLIGHT_WORD_UNDER_CURSOR:
+"=======================================================================================================================
+
+let w:m1 = 0
+function! HighlightWordUnderCursor()
+    if(exists('w:m1') && w:m1 > 0)
+        silent! call matchdelete(w:m1)
+        let w:m1 = 0
+    endif
+    let l:currentword = escape(expand('<cword>'), '.')
+    if(strlen(l:currentword) > 0)
+        let w:m1=100
+
+        " match rgba...
+        let l:q = matchstr(expand('<cword>'), '\x\{8\}')
+        if(l:q == "") " without alpha
+            let l:q = matchstr(expand('<cword>'), '\x\{6\}')
+            let l:a = 255
+        else " with alpha...
+            let l:a = str2nr(strpart(l:q, 6, 2), 16)
+        endif
+
+        if(l:q != "")
+            let l:r = str2nr(strpart(l:q, 0, 2), 16) * (l:a / 255.0)
+            let l:g = str2nr(strpart(l:q, 2, 2), 16) * (l:a / 255.0)
+            let l:b = str2nr(strpart(l:q, 4, 2), 16) * (l:a / 255.0)
+            let l:color =
+                        \ printf('%02x', float2nr(l:r))
+                        \ . printf('%02x', float2nr(l:g))
+                        \ . printf('%02x', float2nr(l:b))
+                        \ . printf('%02x', float2nr(l:a))
+
+            let l:brightness = (l:r / 3) + (l:g / 1) + (l:b / 8)
+
+            " echo 'q:'. l:q . ' r:' . l:r . ' g:' . l:g . ' b:' . l:b . ' a:' . l:a . ' / ' . 
+            "            \ (str2nr(l:a, 16) / 255.0) . ' brightness: ' . l:brightness . ' / color:' . l:color
+
+            if(l:brightness > 240)
+                exec 'highlight! ' . l:color . ' guibg=#' . strpart(l:color, 0, 6) . ' guifg=#000000'
+            else
+                exec 'highlight! ' . l:color . ' guibg=#' . strpart(l:color, 0, 6) . ' guifg=#ffffff'
+            endif
+
+            exec 'syntax clear ' . l:color
+            exec 'syntax match ' . l:color . ' /\#' . l:q . '/'
+        else
+            silent! call matchadd('Underline', '\<'.l:currentword.'\>', -1, w:m1)
+        endif
+    endif
+endfunction
+
+" set updatetime=100
+highlight! Underline cterm=underline gui=underline
+autocmd CursorMoved,InsertLeave,TextChanged * call HighlightWordUnderCursor()
+
+" vim: expandtab tabstop=4 sw=4
diff --git a/screenshot.png b/screenshot.png
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