From a9aacd33ce50961fcf835a4b713e58f8080189ed Mon Sep 17 00:00:00 2001
From: Akianonymus <anonymus.aki@gmail.com>
Date: Fri, 9 Sep 2022 09:51:23 +0530
Subject: Fix reload on au ColorScheme | Check if buffer is valid before
 attaching

---
 doc/colorizer.txt                       |  7 +++++++
 doc/modules/colorizer.buffer_utils.html | 18 ++++++++++++++++++
 lua/colorizer.lua                       | 12 +++++++++++-
 lua/colorizer/buffer_utils.lua          |  6 ++++++
 4 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/doc/colorizer.txt b/doc/colorizer.txt
index 3dba4d2..05fc8da 100644
--- a/doc/colorizer.txt
+++ b/doc/colorizer.txt
@@ -247,6 +247,8 @@ Helper functions to highlight buffer smartly
 LUA API                                         *colorizer.buffer_utils-lua-api*
 
 Functions: ~
+    |clear_hl_cache| - Clean the highlight cache
+
     |highlight_buffer| - Highlight the buffer region.
 
     |rehighlight_buffer| - Rehighlight the buffer if colorizer is active
@@ -260,6 +262,11 @@ Fields: ~
     `colorizer.attach_to_buffer`.
 
 
+clear_hl_cache()                         *colorizer.buffer_utils.clear_hl_cache*
+    Clean the highlight cache
+
+
+
 
 				       *colorizer.buffer_utils.highlight_buffer*
 highlight_buffer({buf}, {ns}, {lines}, {line_start}, {line_end}, {options},
diff --git a/doc/modules/colorizer.buffer_utils.html b/doc/modules/colorizer.buffer_utils.html
index 315794d..7260c5c 100644
--- a/doc/modules/colorizer.buffer_utils.html
+++ b/doc/modules/colorizer.buffer_utils.html
@@ -61,6 +61,10 @@
 
 <h2><a href="#Functions">Functions</a></h2>
 <table class="function_list">
+	<tr>
+	<td class="name" nowrap><a href="#clear_hl_cache">clear_hl_cache ()</a></td>
+	<td class="summary">Clean the highlight cache</td>
+	</tr>
 	<tr>
 	<td class="name" nowrap><a href="#highlight_buffer">highlight_buffer (buf, ns, lines, line_start, line_end, options, options_local)</a></td>
 	<td class="summary">Highlight the buffer region.</td>
@@ -92,6 +96,20 @@
     <h2 class="section-header "><a name="Functions"></a>Functions</h2>
 
     <dl class="function">
+    <dt>
+    <a name = "clear_hl_cache"></a>
+    <strong>clear_hl_cache ()</strong>
+    </dt>
+    <dd>
+    Clean the highlight cache
+
+
+
+
+
+
+
+</dd>
     <dt>
     <a name = "highlight_buffer"></a>
     <strong>highlight_buffer (buf, ns, lines, line_start, line_end, options, options_local)</strong>
diff --git a/lua/colorizer.lua b/lua/colorizer.lua
index 93d21db..f9010c4 100644
--- a/lua/colorizer.lua
+++ b/lua/colorizer.lua
@@ -65,6 +65,7 @@ local buffer_utils = require "colorizer.buffer_utils"
 local DEFAULT_NAMESPACE = buffer_utils.DEFAULT_NAMESPACE
 
 local HIGHLIGHT_MODE_NAMES = buffer_utils.HIGHLIGHT_MODE_NAMES
+local clear_hl_cache = buffer_utils.clear_hl_cache
 local rehighlight_buffer = buffer_utils.rehighlight_buffer
 
 ---Highlight the buffer region
@@ -166,7 +167,12 @@ end
 local function is_buffer_attached(buf)
   if buf == 0 or buf == nil then
     buf = current_buf()
+  else
+    if not api.nvim_buf_is_valid(buf) then
+      return
+    end
   end
+
   local au = api.nvim_get_autocmds {
     group = AUGROUP_ID,
     event = { "WinScrolled", "TextChanged", "TextChangedI", "TextChangedP" },
@@ -214,6 +220,10 @@ end
 local function attach_to_buffer(buf, options, typ)
   if buf == 0 or buf == nil then
     buf = current_buf()
+  else
+    if not api.nvim_buf_is_valid(buf) then
+      return
+    end
   end
 
   if not options then
@@ -448,7 +458,7 @@ end
 
 --- Clear the highlight cache and reload all buffers.
 local function clear_highlight_cache()
-  HIGHLIGHT_CACHE = {}
+  clear_hl_cache()
   vim.schedule(reload_all_buffers)
 end
 
diff --git a/lua/colorizer/buffer_utils.lua b/lua/colorizer/buffer_utils.lua
index 2f31a2b..a3b3da7 100644
--- a/lua/colorizer/buffer_utils.lua
+++ b/lua/colorizer/buffer_utils.lua
@@ -30,6 +30,11 @@ local HIGHLIGHT_MODE_NAMES = {
 }
 local HIGHLIGHT_CACHE = {}
 
+--- Clean the highlight cache
+local function clear_hl_cache()
+  HIGHLIGHT_CACHE = {}
+end
+
 --- Make a deterministic name for a highlight given these attributes
 local function make_highlight_name(rgb, mode)
   return table.concat({ HIGHLIGHT_NAME_PREFIX, HIGHLIGHT_MODE_NAMES[mode], rgb }, "_")
@@ -333,6 +338,7 @@ end
 return {
   DEFAULT_NAMESPACE = DEFAULT_NAMESPACE,
   HIGHLIGHT_MODE_NAMES = HIGHLIGHT_MODE_NAMES,
+  clear_hl_cache = clear_hl_cache,
   rehighlight_buffer = rehighlight_buffer,
   highlight_buffer = highlight_buffer,
 }
-- 
cgit v1.2.3-70-g09d2