add latexCfgChunks

src/Reanimate/LaTeX.hs

@@ -109,17 +109,23 @@ someTexWithHeaders engine exec dvi args headers postscript tex =
   where
     script = mkTexScript exec args headers (T.unlines (postscript ++ [tex]))
 
--- | Invoke latex and separate results.
+-- | Invoke latex using a given configuration and separate results.
-latexChunks :: [T.Text] -> [Tree]
+latexCfgChunks :: TexConfig -> [T.Text] -> [Tree]
-latexChunks chunks | pNoExternals = map mkText chunks
+latexCfgChunks _cfg chunks | pNoExternals = map mkText chunks
-latexChunks chunks = worker (svgGlyphs $ latex $ T.concat chunks) chunks
+latexCfgChunks cfg chunks = worker chunks $ svgGlyphs $ tex $ T.concat chunks
   where
+    tex = latexCfg cfg
     merge lst = mkGroup [fmt svg | (fmt, _, svg) <- lst]
     worker [] [] = []
-    worker _ [] = error "latex chunk mismatch"
+    worker [] _ = error "latex chunk mismatch"
-    worker everything (x : xs) =
+    worker (x : xs) everything =
-      let width = length $ svgGlyphs (latex x)
+      let width = length $ svgGlyphs (tex x)
-       in merge (take width everything) : worker (drop width everything) xs
+          (first, rest) = splitAt width everything
+       in merge first : worker xs rest
+
+-- | Invoke latex and separate results.
+latexChunks :: [T.Text] -> [Tree]
+latexChunks = latexCfgChunks (TexConfig LaTeX [] [])
 
 -- | Invoke xelatex and import the result as an SVG object. SVG objects are
 --   cached to improve performance. Xelatex has support for non-western scripts.