From 2ccaf8efc08d4609056fc6fb7a29740d4cfa93e6 Mon Sep 17 00:00:00 2001
From: Josh Rahm <rahm@google.com>
Date: Tue, 28 Sep 2021 11:11:35 -0600
Subject: Add ability to set the saturation of a color.

---
 autoload/spectral.py  | 19 ++++++++++++++++++-
 autoload/spectral.vim | 21 +++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

(limited to 'autoload')

diff --git a/autoload/spectral.py b/autoload/spectral.py
index f7903aa..9afcf6b 100644
--- a/autoload/spectral.py
+++ b/autoload/spectral.py
@@ -3,7 +3,7 @@ import os
 import vim
 import colormath
 import colormath.color_diff
-from colormath.color_objects import LabColor, sRGBColor
+from colormath.color_objects import LabColor, sRGBColor, HSVColor
 from colormath.color_conversions import convert_color
 import sys
 import math
@@ -423,6 +423,23 @@ def spectral_start(outfile):
   spectral_ctx = Vivid(outfile)
   spectral_ctx.start()
 
+def set_saturation(color, amnt):
+  if isinstance(color, str):
+    color = sRGBColor.new_from_rgb_hex(color)
+
+  print("Color " + str(color) + " " + get_rgb_hex(color))
+  color_hsv = convert_color(color, HSVColor)
+  (h, s, v) = color_hsv.get_value_tuple()
+
+  print("HSVPre " + str(color_hsv))
+  color_hsv = HSVColor(h, amnt, v)
+  print("HSVPost " + str(color_hsv))
+  return convert_color(color_hsv, sRGBColor)
+
+def spectral_set_saturation(color, amnt):
+  c = set_saturation(color, amnt)
+  vim.command('let g:return="%s"' % get_rgb_hex(c))
+
 
 def lighter(color, amt):
   if isinstance(color, str):
diff --git a/autoload/spectral.vim b/autoload/spectral.vim
index e2b6376..fe70131 100644
--- a/autoload/spectral.vim
+++ b/autoload/spectral.vim
@@ -50,6 +50,27 @@ function! spectral#desaturate(color, amount)
   return spectral#toColor(nr, ng, nb)
 endfunction
 
+function! spectral#set_saturation(color, amount)
+  let saved = 0
+  if exists('g:return')
+    let old_return = g:return
+    let saved = 1
+  endif
+
+  call s:loadPythonScript()
+  exec printf('python3 spectral_set_saturation("%s", %s)', a:color, a:amount)
+
+  let ret = g:return
+
+  if saved
+    let g:return = old_return
+  else
+    unlet g:return
+  endif
+
+  return ret
+endfunction
+
 
 function! spectral#parseColor(color) abort
   if type(a:color) == v:t_list
-- 
cgit