fix: anti-conceal ignore modes

## Details

The `conceal` attribute of marks was previously computed once at the
time of creation. However mode changes do not always cause marks to be
recreated. Since the `conceal` value can depend on `mode` to support
disabling anti-conceal at a per element level based on `mode` this can
lead to storing incorrect values based on the current `mode`.

To fix this rather than storing `conceal` as the final computed
`boolean`, allow the value to a `boolean` or the `element` value
associated with the mark. Then move the logic to compute the `boolean`
into the main update loop, just before we either show or hide the
extmark. This way the value gets recomputed based on whatever value the
current `mode` is.

This is fully backwards compatible, even with custom handlers, in fact
it allows custom handlers to provide element strings for the `conceal`
property which makes them more powerful, nice side effect.

Author: MeanderingProgrammer

doc/custom-handlers.md

@@ -21,11 +21,13 @@ Each handler must conform to the following interface:
 ---@field root TSNode
 
 ---@class (exact) render.md.Mark
----@field conceal boolean
+---@field conceal render.md.mark.Conceal
 ---@field start_row integer
 ---@field start_col integer
 ---@field opts render.md.mark.Opts
 
+---@alias render.md.mark.Conceal boolean|render.md.Element
+
 ---@class render.md.mark.Opts: vim.api.keyset.set_extmark
 ---@field hl_mode? 'replace'|'combine'|'blend'
 ---@field virt_text? render.md.mark.Line

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*       For NVIM v0.11.3       Last change: 2025 August 21
+*render-markdown.txt*       For NVIM v0.11.3       Last change: 2025 August 24
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/core/ui.lua

@@ -185,7 +185,7 @@ function Updater:display()
     local range = self:hidden()
     local extmarks = self.decorator:get()
     for _, extmark in ipairs(extmarks) do
-        if extmark:get().conceal and extmark:overlaps(range) then
+        if self:conceal(extmark, range) then
             extmark:hide(M.ns, self.buf)
         else
             extmark:show(M.ns, self.buf)
@@ -218,6 +218,25 @@ function Updater:hidden()
     end
 end
 
+---@private
+---@param extmark render.md.Extmark
+---@param range? render.md.Range
+---@return boolean
+function Updater:conceal(extmark, range)
+    local conceal = extmark:get().conceal
+    if type(conceal) == 'boolean' then
+        if not conceal then
+            return false
+        end
+    else
+        local modes = self.config.anti_conceal.ignore[conceal]
+        if modes and env.mode.is(self.mode, modes) then
+            return false
+        end
+    end
+    return extmark:overlaps(range)
+end
+
 ---@private
 M.updater = Updater
 

lua/render-markdown/debug/marks.lua

@@ -3,7 +3,7 @@
 ---@field [2]? integer
 
 ---@class render.md.debug.Mark
----@field conceal boolean
+---@field conceal render.md.mark.Conceal
 ---@field opts render.md.mark.Opts
 ---@field row render.md.debug.Range
 ---@field col render.md.debug.Range

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.7.10'
+M.version = '8.7.11'
 
 function M.check()
     M.start('versions')

lua/render-markdown/lib/marks.lua

@@ -1,14 +1,15 @@
 local compat = require('render-markdown.lib.compat')
-local env = require('render-markdown.lib.env')
 local log = require('render-markdown.core.log')
 local str = require('render-markdown.lib.str')
 
 ---@class (exact) render.md.Mark
----@field conceal boolean
+---@field conceal render.md.mark.Conceal
 ---@field start_row integer
 ---@field start_col integer
 ---@field opts render.md.mark.Opts
 
+---@alias render.md.mark.Conceal boolean|render.md.Element
+
 ---@class render.md.mark.Opts: vim.api.keyset.set_extmark
 ---@field hl_mode? 'replace'|'combine'|'blend'
 ---@field virt_text? render.md.mark.Line
@@ -23,11 +24,8 @@ local str = require('render-markdown.lib.str')
 
 ---@alias render.md.mark.Hl string|string[]
 
----@alias render.md.mark.Element boolean|render.md.Element
-
 ---@class render.md.Marks
 ---@field private context render.md.request.Context
----@field private ignore render.md.conceal.Ignore
 ---@field private update boolean
 ---@field private marks render.md.Mark[]
 local Marks = {}
@@ -39,7 +37,6 @@ Marks.__index = Marks
 function Marks.new(context, update)
     local self = setmetatable({}, Marks)
     self.context = context
-    self.ignore = context.config.anti_conceal.ignore
     self.update = update
     self.marks = {}
     return self
@@ -50,20 +47,20 @@ function Marks:get()
     return self.marks
 end
 
----@param element render.md.mark.Element
+---@param conceal render.md.mark.Conceal
 ---@param node render.md.Node
 ---@param opts render.md.mark.Opts
 ---@return boolean
-function Marks:start(element, node, opts)
-    return self:add(element, node.start_row, node.start_col, opts)
+function Marks:start(conceal, node, opts)
+    return self:add(conceal, node.start_row, node.start_col, opts)
 end
 
----@param element render.md.mark.Element
+---@param conceal render.md.mark.Conceal
 ---@param node? render.md.Node
 ---@param opts render.md.mark.Opts
 ---@param offset? Range4
 ---@return boolean
-function Marks:over(element, node, opts, offset)
+function Marks:over(conceal, node, opts, offset)
     if not node then
         return false
     end
@@ -72,18 +69,18 @@ function Marks:over(element, node, opts, offset)
     local start_col = node.start_col + offset[2]
     opts.end_row = node.end_row + offset[3]
     opts.end_col = node.end_col + offset[4]
-    return self:add(element, start_row, start_col, opts)
+    return self:add(conceal, start_row, start_col, opts)
 end
 
----@param element render.md.mark.Element
+---@param conceal render.md.mark.Conceal
 ---@param start_row integer
 ---@param start_col integer
 ---@param opts render.md.mark.Opts
 ---@return boolean
-function Marks:add(element, start_row, start_col, opts)
+function Marks:add(conceal, start_row, start_col, opts)
     ---@type render.md.Mark
     local mark = {
-        conceal = self:conceal(element),
+        conceal = conceal,
         start_row = start_row,
         start_col = start_col,
         opts = opts,
@@ -102,21 +99,6 @@ function Marks:add(element, start_row, start_col, opts)
     return true
 end
 
----@private
----@param element render.md.mark.Element
----@return boolean
-function Marks:conceal(element)
-    if type(element) == 'boolean' then
-        return element
-    end
-    local modes = self.ignore[element]
-    if modes == nil then
-        return true
-    else
-        return not env.mode.is(self.context.mode, modes)
-    end
-end
-
 ---@private
 ---@param opts render.md.mark.Opts
 ---@return boolean, string, string

scripts/update.py

@@ -158,6 +158,7 @@ def update_handlers(root: Path) -> None:
         "render.md.Handler",
         "render.md.handler.Context",
         "render.md.Mark",
+        "render.md.mark.Conceal",
         "render.md.mark.Opts",
         "render.md.mark.Line",
         "render.md.mark.Text",