feat: reload runtime highlights on color scheme change

## Details

Add a ColorScheme autocommand which regenerates cached colors created at
runtime.

To do this the cache now needs to store all the information needed to
re-create the colors rather than just the colors that have already been
created.

Moves the VimLeave autocommand out of manager and directly into the
setup method of the log module. This keeps the manager module coupled to
buffer level events and allows the log module to manage its lifecycle in
a self contained way.

Author: MeanderingProgrammer

CHANGELOG.md

@@ -11,6 +11,7 @@
 - `render_modes` as a boolean [7493db6](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/7493db6d3fe3f6679549e6020498f72e97cd9b73)
 - anti conceal selected range in visual mode [#168](https://github.com/MeanderingProgrammer/render-markdown.nvim/issues/168)
   [5ff191f](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/5ff191f0c7457ede2fd30ecf76ab16c65118b4ee)
+  [354baf4](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/354baf485370b670bb1c1cd64309438607b0465d)
 - disable rendering in diff mode [#169](https://github.com/MeanderingProgrammer/render-markdown.nvim/issues/169)
   [01b38dc](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/01b38dcf7d0a99620547651fb59a3ba521ba12d5)
 

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*         For 0.10.0        Last change: 2024 September 18
+*render-markdown.txt*         For 0.10.0        Last change: 2024 September 19
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/colors.lua

@@ -1,5 +1,10 @@
----@type string[]
-local cache = {}
+---@class render.md.cache.Colors
+---@field combine table<string, { fg: string, bg: string }>
+---@field inverse table<string, { hl: string }>
+local Cache = {
+    combine = {},
+    inverse = {},
+}
 
 ---@class render.md.Colors
 local M = {}
@@ -51,19 +56,34 @@ M.colors = {
 
 ---Should only be called from plugin directory
 function M.setup()
+    -- Reload generated colors on color scheme change
+    vim.api.nvim_create_autocmd('ColorScheme', {
+        group = vim.api.nvim_create_augroup('RenderMarkdownColors', { clear = true }),
+        callback = M.reload,
+    })
     for name, link in pairs(M.colors) do
         vim.api.nvim_set_hl(0, M.prefix .. name, { link = link, default = true })
     end
 end
 
+---@private
+function M.reload()
+    for _, color in pairs(Cache.combine) do
+        M.combine(color.fg, color.bg, true)
+    end
+    for _, color in pairs(Cache.inverse) do
+        M.inverse_bg(color.hl, true)
+    end
+end
+
 ---@param foreground string
 ---@param background string
+---@param force? boolean
 ---@return string
-function M.combine(foreground, background)
+function M.combine(foreground, background, force)
     local name = string.format('%s_%s_%s', M.prefix, foreground, background)
-    if not vim.tbl_contains(cache, name) then
-        local fg = M.get_hl(foreground)
-        local bg = M.get_hl(background)
+    if Cache.combine[name] == nil or force then
+        local fg, bg = M.get_hl(foreground), M.get_hl(background)
         vim.api.nvim_set_hl(0, name, {
             fg = fg.fg,
             bg = bg.bg,
@@ -72,23 +92,24 @@ function M.combine(foreground, background)
             ---@diagnostic disable-next-line: undefined-field
             ctermbg = bg.ctermbg,
         })
-        table.insert(cache, name)
+        Cache.combine[name] = { fg = foreground, bg = background }
     end
     return name
 end
 
 ---@param highlight string
+---@param force? boolean
 ---@return string
-function M.inverse_bg(highlight)
+function M.inverse_bg(highlight, force)
     local name = string.format('%s_Inverse_%s', M.prefix, highlight)
-    if not vim.tbl_contains(cache, name) then
+    if Cache.inverse[name] == nil or force then
         local hl = M.get_hl(highlight)
         vim.api.nvim_set_hl(0, name, {
             fg = hl.bg,
             ---@diagnostic disable-next-line: undefined-field
             ctermfg = hl.ctermbg,
         })
-        table.insert(cache, name)
+        Cache.inverse[name] = { hl = highlight }
     end
     return name
 end

lua/render-markdown/core/log.lua

@@ -14,6 +14,11 @@ local M = {}
 
 ---@param level render.md.config.LogLevel
 function M.setup(level)
+    -- Write out any logs before closing
+    vim.api.nvim_create_autocmd('VimLeave', {
+        group = vim.api.nvim_create_augroup('RenderMarkdownLog', { clear = true }),
+        callback = M.flush,
+    })
     M.level = level
     M.entries = {}
     -- Typically resolves to ~/.local/state/nvim/render-markdown.log

lua/render-markdown/health.lua

@@ -4,7 +4,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '7.0.10'
+M.version = '7.0.11'
 
 function M.check()
     M.start('version')

lua/render-markdown/manager.lua

@@ -33,11 +33,6 @@ function M.setup()
             end
         end,
     })
-    -- Write out any logs before closing
-    vim.api.nvim_create_autocmd('VimLeave', {
-        group = M.group,
-        callback = log.flush,
-    })
 end
 
 ---@param enabled boolean