add _extensions

_extensions/drwater/latex-body-quotes/_extension.yml

@@ -0,0 +1,7 @@
+title: Tailor Quotes for Chinese Characters in LaTeX Body
+author: Tom Ben
+version: 1.0.0
+quarto-required: ">=1.5.0"
+contributes:
+  filters:
+    - latex-body-quotes.lua

_extensions/drwater/latex-body-quotes/latex-body-quotes.lua

@@ -0,0 +1,25 @@
+-- Replace Chinese corner brackets with guillemets for LaTeX output.
+-- This filter is responsible for body text only; header handling lives in latex-header-quotes.
+-- The filter is run before citeproc to avoid touching bibliography, which is handled separately in cnbib-quotes.
+
+--- Copyright: © 2025–Present Tom Ben
+--- License: MIT License
+
+function Str(el)
+    if not FORMAT:match('latex') then
+        return el
+    end
+
+    local replacements = {
+        ['「'] = '«',
+        ['」'] = '»',
+        ['『'] = '‹',
+        ['』'] = '›'
+    }
+
+    for original, replacement in pairs(replacements) do
+        el.text = el.text:gsub(original, replacement)
+    end
+
+    return el
+end