From 1543a063fbd3a462879d696b2885f4aa90c55896 Mon Sep 17 00:00:00 2001
From: Folke Lemaitre <folke.lemaitre@gmail.com>
Date: Thu, 20 Feb 2025 11:56:56 +0100
Subject: [PATCH] feat(image): allow disabling math rendering. Closes #1247

---
 lua/snacks/image/doc.lua  | 16 +++++++++++++---
 lua/snacks/image/init.lua |  5 ++---
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lua/snacks/image/doc.lua b/lua/snacks/image/doc.lua
index 883e036e..d450feed 100644
--- a/lua/snacks/image/doc.lua
+++ b/lua/snacks/image/doc.lua
@@ -1,6 +1,9 @@
 ---@class snacks.image.doc
 local M = {}
 
+---@alias TSMatch {node:TSNode, meta:vim.treesitter.query.TSMetadata}
+---@alias snacks.image.transform fun(match: snacks.image.match, ctx: snacks.image.ctx)
+
 ---@class snacks.image.Hover
 ---@field img snacks.image.Placement
 ---@field win snacks.win
@@ -14,9 +17,13 @@ local M = {}
 ---@field src? TSMatch
 ---@field content? TSMatch
 
----@alias TSMatch {node:TSNode, meta:vim.treesitter.query.TSMetadata}
----@alias snacks.image.match {id: string, pos: snacks.image.Pos, src?: string, content?: string, ext?: string, range?:Range4}
----@alias snacks.image.transform fun(match: snacks.image.match, ctx: snacks.image.ctx)
+---@class snacks.image.match
+---@field id string
+---@field pos snacks.image.Pos
+---@field src? string
+---@field content? string
+---@field ext? string
+---@field range? Range4
 
 local META_EXT = "image.ext"
 local META_SRC = "image.src"
@@ -226,6 +233,9 @@ function M._img(ctx)
   if img.src then
     img.src = M.resolve(ctx.buf, img.src)
   end
+  if not Snacks.image.config.doc.math and img.ext and img.ext:find("math") then
+    return
+  end
   if img.content and not img.src then
     local root = Snacks.image.config.cache
     vim.fn.mkdir(root, "p")
diff --git a/lua/snacks/image/init.lua b/lua/snacks/image/init.lua
index 44f55e7f..780a065e 100644
--- a/lua/snacks/image/init.lua
+++ b/lua/snacks/image/init.lua
@@ -67,8 +67,8 @@ local defaults = {
   doc = {
     -- enable image viewer for documents
     -- a treesitter parser must be available for the enabled languages.
-    -- supported language injections: markdown, html
     enabled = true,
+    math = true, -- enable math expression rendering
     -- render the image inline in the buffer
     -- if your env doesn't support unicode placeholders, this will be disabled
     -- takes precedence over `opts.float` on supported terminals
@@ -79,8 +79,7 @@ local defaults = {
     max_width = 80,
     max_height = 40,
     -- Set to `true`, to conceal the image text when rendering inline.
-    -- (experimental)
-    conceal = false,
+    conceal = false, -- (experimental)
   },
   img_dirs = { "img", "images", "assets", "static", "public", "media", "attachments" },
   -- window options applied to windows displaying image buffers