Add position and size for fences

lib/rules_block/fence.js

@@ -4,7 +4,7 @@
 
 
 module.exports = function fence(state, startLine, endLine, silent) {
-  var marker, len, params, nextLine, mem, token, markup,
+  var marker, len, params, nextLine, mem, token, markup, originalPos,
       haveEndMarker = false,
       pos = state.bMarks[startLine] + state.tShift[startLine],
       max = state.eMarks[startLine];
@@ -25,6 +25,7 @@ module.exports = function fence(state, startLine, endLine, silent) {
 
   if (len < 3) { return false; }
 
+  originalPos = mem;
   markup = state.src.slice(mem, pos);
   params = state.src.slice(pos, max);
 
@@ -87,5 +88,8 @@ module.exports = function fence(state, startLine, endLine, silent) {
   token.markup  = markup;
   token.map     = [ startLine, state.line ];
 
+  token.position = originalPos;
+  token.size = pos - originalPos;
+
   return true;
 };