Support config

Author: danny0838

parse-css.js

@@ -13,6 +13,11 @@
   }
 }(this, function (exports) {
 
+const config = {
+  tokenizeErrorHandler: null,
+  parseErrorHandler: null,
+};
+
 function between(num, first, last) { return num >= first && num <= last; }
 function digit(code) { return between(code, 0x30,0x39); }
 function hexdigit(code) { return digit(code) || between(code, 0x41,0x46) || between(code, 0x61,0x66); }
@@ -145,7 +150,13 @@ function tokenize(str) {
     return codepoint == -1;
   };
   var donothing = function() {};
-  var parseerror = function() { console.log("Parse error at index " + i + ", processing codepoint 0x" + code.toString(16) + ".");return true; };
+  var parseerror = function() {
+    if (typeof config.tokenizeErrorHandler === 'function') {
+      return config.tokenizeErrorHandler(i, code);
+    }
+    console.log("Parse error at index " + i + ", processing codepoint 0x" + code.toString(16) + ".");
+    return true;
+  };
 
   var consumeAToken = function() {
     consumeComments();
@@ -865,8 +876,13 @@ class TokenStream {
   }
 }
 
-function parseerror(s, msg) {
-  console.log("Parse error at token " + s.i + ": " + s.tokens[s.i] + ".\n" + msg);
+function parseerror(stream, msg) {
+  const index = stream.i;
+  const token = stream.tokens[index];
+  if (typeof config.parseErrorHandler === 'function') {
+    return config.parseErrorHandler(index, token, msg);
+  }
+  console.log("Parse error at token " + index + ": " + token + ".\n" + msg);
   return true;
 }
 
@@ -1383,6 +1399,7 @@ function printIndent(level) {
 }
 
 return {
+  config,
   tokenize,
   IdentToken,
   FunctionToken,