planning

node_modules/stringify-entities/lib/util/format-smart.js

@@ -0,0 +1,48 @@
+module.exports = formatPretty
+
+var toHexadecimal = require('./to-hexadecimal')
+var toDecimal = require('./to-decimal')
+var toNamed = require('./to-named')
+
+// Encode `character` according to `options`.
+function formatPretty(code, next, options) {
+  var named
+  var numeric
+  var decimal
+
+  if (options.useNamedReferences || options.useShortestReferences) {
+    named = toNamed(
+      code,
+      next,
+      options.omitOptionalSemicolons,
+      options.attribute
+    )
+  }
+
+  if (options.useShortestReferences || !named) {
+    numeric = toHexadecimal(code, next, options.omitOptionalSemicolons)
+
+    // Use the shortest numeric reference when requested.
+    // A simple algorithm would use decimal for all code points under 100, as
+    // those are shorter than hexadecimal:
+    //
+    // * `c` vs `c` (decimal shorter)
+    // * `d` vs `d` (equal)
+    //
+    // However, because we take `next` into consideration when `omit` is used,
+    // And it would be possible that decimals are shorter on bigger values as
+    // well if `next` is hexadecimal but not decimal, we instead compare both.
+    if (options.useShortestReferences) {
+      decimal = toDecimal(code, next, options.omitOptionalSemicolons)
+
+      if (decimal.length < numeric.length) {
+        numeric = decimal
+      }
+    }
+  }
+
+  return named &&
+    (!options.useShortestReferences || named.length < numeric.length)
+    ? named
+    : numeric
+}