widl-nan/templates/callback.def

Auto generate native C++ addon source code by parsing Web IDL definition

{{#def.idlType}}
{{#def.members}}

{{

var getCallbackHelperClassName = function (className) {
  return className + 'Helper';
};

var extractAllCallbackMethod = function (def) {
  var result = {
    callbacks: {},
    callbacksArray: [],
    methods: []
  };
  getAllMethodMembers(def).forEach(method => {
    if (method.arguments) {
      method.arguments.forEach(arg => {
        if (! isPrimitiveType(arg.idlType)) {
          var type = arg.idlType.idlType;
          if (def.refTypeMap[type]) {
            var callback = def.refTypeMap[type];
            if (callback.type === 'callback') {
              result.methods.push(method);
              result.callbacks[callback.name] = callback;
              result.callbacksArray.push(callback);
            }
          }
        }
      });
    }
  });
  return result;
};

var isCallback = function (idlType, callback) {
  var retValue = false;
  var typeName = idlType.idlType;
  if (callback && callback.callbacks && callback.callbacks[typeName] && callback.callbacks[typeName].type === 'callback') {
    retValue = true;
  }
  return retValue;
};

var getCallbackHelperAssignmentString = function(method, padding) {
  padding = padding || '';
  var callback = extractAllCallbackMethod(it);

  var returnList = [];
  if ( method.arguments ) {
    method.arguments.forEach(arg => {
      if (isCallback(arg.idlType, callback)) {
        if (returnList.length == 0) {
          returnList.push('// TODO(widl-nan): Use a collection if want to hold multiple callbacks');
        }

        var helperClassName = getCallbackHelperClassName(arg.idlType.idlType);
        var str = 'this->';
        str += classNameToMemberName(helperClassName);
        str += '.reset(';
        str += arg.name;
        str += ');';
        returnList.push(str);

        str = '// TODO(widl-nan): use this->';
        str += 'Call' + helperClassName + '()';
        returnList.push(str);

        str = '//       to call JavaScript callback function in the future (Do NOT do it a thread)';
        returnList.push(str);
      }
    });
  }
  return returnList.join('\n' + padding);
};

}}