perf: store callouts and checkboxes in table keyed on raw value

## Details

Currently resolving the callout or checkbox for a particular
shortcut_link requires iterating through the configured values one at a
time. This is slower than it needs to be since we can pre-compute all
the normalized raw values once, store that as the key to the table, then
do a single lookup into the table when needed, skipping the for loop.

To do this add an additional buffer config type that gets returned from
state. This new config will store the normalized component mappings
along with all of the other values already present. This will only
run once per buffer.

Author: MeanderingProgrammer

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*         For 0.10.0        Last change: 2024 September 09
+*render-markdown.txt*         For 0.10.0        Last change: 2024 September 11
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/components.lua

@@ -0,0 +1,32 @@
+---@class render.md.component.Config
+---@field callout table<string, render.md.CustomComponent>
+---@field checkbox table<string, render.md.CustomComponent>
+
+---@class render.md.buffer.Config: render.md.BufferConfig
+---@field component render.md.component.Config
+
+---@class render.md.component.Resolver
+local M = {}
+
+---@param config render.md.BufferConfig
+---@return render.md.buffer.Config
+function M.resolve(config)
+    ---@type render.md.component.Config
+    local component = {
+        callout = M.normalize(config.callout),
+        checkbox = M.normalize(config.checkbox.custom),
+    }
+    return vim.tbl_deep_extend('force', { component = component }, config)
+end
+
+---@private
+---@param components table<string, render.md.CustomComponent>
+function M.normalize(components)
+    local result = {}
+    for _, component in pairs(components) do
+        result[component.raw:lower()] = component
+    end
+    return result
+end
+
+return M

lua/render-markdown/core/extmark.lua

@@ -19,7 +19,7 @@ function Extmark.new(namespace, buf, mark)
     return self
 end
 
----@param config render.md.BufferConfig
+---@param config render.md.buffer.Config
 ---@param row? integer
 function Extmark:render(config, row)
     if self:should_show(config.anti_conceal, row) then

lua/render-markdown/core/ui.lua

@@ -96,7 +96,7 @@ function M.update(buf, win, parse)
 end
 
 ---@private
----@param config render.md.BufferConfig
+---@param config render.md.buffer.Config
 ---@param win integer
 ---@return 'default'|'rendered'
 function M.next_state(config, win)

lua/render-markdown/handler/markdown.lua

@@ -6,7 +6,7 @@ local str = require('render-markdown.core.str')
 
 ---@class render.md.handler.buf.Markdown
 ---@field private marks render.md.Marks
----@field private config render.md.BufferConfig
+---@field private config render.md.buffer.Config
 ---@field private context render.md.Context
 ---@field private renderers table<string, render.md.Renderer>
 local Handler = {}

lua/render-markdown/handler/markdown_inline.lua

@@ -6,7 +6,7 @@ local str = require('render-markdown.core.str')
 
 ---@class render.md.handler.buf.MarkdownInline
 ---@field private marks render.md.Marks
----@field private config render.md.BufferConfig
+---@field private config render.md.buffer.Config
 ---@field private context render.md.Context
 local Handler = {}
 Handler.__index = Handler
@@ -55,13 +55,13 @@ end
 ---@private
 ---@param info render.md.NodeInfo
 function Handler:shortcut(info)
-    local callout = self:get_callout(info)
+    local callout = self.config.component.callout[info.text:lower()]
     if callout ~= nil then
         self:callout(info, callout)
         return
     end
 
-    local checkbox = self:get_checkbox(info)
+    local checkbox = self.config.component.checkbox[info.text:lower()]
     if checkbox ~= nil then
         self:checkbox(info, checkbox)
         return
@@ -74,32 +74,6 @@ function Handler:shortcut(info)
     end
 end
 
----@private
----@param info render.md.NodeInfo
----@return render.md.CustomComponent?
-function Handler:get_callout(info)
-    local text = info.text:lower()
-    for _, callout in pairs(self.config.callout) do
-        if text == callout.raw:lower() then
-            return callout
-        end
-    end
-    return nil
-end
-
----@private
----@param info render.md.NodeInfo
----@return render.md.CustomComponent?
-function Handler:get_checkbox(info)
-    local text = info.text
-    for _, checkbox in pairs(self.config.checkbox.custom) do
-        if text == checkbox.raw then
-            return checkbox
-        end
-    end
-    return nil
-end
-
 ---@private
 ---@param info render.md.NodeInfo
 ---@param callout render.md.CustomComponent

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local M = {}
 
 ---@private
 ---@type string
-M.version = '6.3.6'
+M.version = '6.3.7'
 
 function M.check()
     vim.health.start('render-markdown.nvim [version]')

lua/render-markdown/render/base.lua

@@ -3,7 +3,7 @@ local str = require('render-markdown.core.str')
 
 ---@class render.md.Renderer
 ---@field protected marks render.md.Marks
----@field protected config render.md.BufferConfig
+---@field protected config render.md.buffer.Config
 ---@field protected context render.md.Context
 ---@field protected info render.md.NodeInfo
 ---@field setup fun(self: render.md.Renderer): boolean
@@ -12,7 +12,7 @@ local Base = {}
 Base.__index = Base
 
 ---@param marks render.md.Marks
----@param config render.md.BufferConfig
+---@param config render.md.buffer.Config
 ---@param context render.md.Context
 ---@param info render.md.NodeInfo
 ---@return render.md.Renderer

lua/render-markdown/render/code.lua

@@ -20,7 +20,7 @@ local Render = setmetatable({}, Base)
 Render.__index = Render
 
 ---@param marks render.md.Marks
----@param config render.md.BufferConfig
+---@param config render.md.buffer.Config
 ---@param context render.md.Context
 ---@param info render.md.NodeInfo
 ---@return render.md.Renderer

lua/render-markdown/render/heading.lua

@@ -20,7 +20,7 @@ local Render = setmetatable({}, Base)
 Render.__index = Render
 
 ---@param marks render.md.Marks
----@param config render.md.BufferConfig
+---@param config render.md.buffer.Config
 ---@param context render.md.Context
 ---@param info render.md.NodeInfo
 ---@return render.md.Renderer