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Less compiler in Java, based on less.js

There is a newer version: 2.0.5

/**
 * Copyright (c) 2014 SQUARESPACE, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.squarespace.less.parse;

import static com.squarespace.less.parse.Parselets.BLOCK;
import static com.squarespace.less.parse.Parselets.COMMENT;
import static com.squarespace.less.parse.Parselets.MIXIN_GUARD;
import static com.squarespace.less.parse.Parselets.MIXIN_PARAMS;

import com.squarespace.less.LessException;
import com.squarespace.less.core.Chars;
import com.squarespace.less.model.Block;
import com.squarespace.less.model.Guard;
import com.squarespace.less.model.Mixin;
import com.squarespace.less.model.MixinParams;
import com.squarespace.less.model.Node;


public class MixinParselet implements Parselet {

  @Override
  public Node parse(LessStream stm) throws LessException {
    char ch = stm.peek();
    if (ch != Chars.PERIOD && ch != Chars.NUMBER_SIGN) {
      return null;
    }
    Mark mark = stm.mark();
    if (!stm.matchMixinName()) {
      return null;
    }

    String name = stm.token();
    MixinParams params = (MixinParams)stm.parse(MIXIN_PARAMS);
    if (params == null) {
      stm.restore(mark);
      return null;
    }
    stm.parse(COMMENT);

    Guard guard = (Guard)stm.parse(MIXIN_GUARD);
    stm.parse(COMMENT);

    Node block = stm.parse(BLOCK);
    if (block == null) {
      stm.restore(mark);
      return null;
    }

    Mixin mixin = stm.context().nodeBuilder().buildMixin(name, params, guard, (Block)block);
    mixin.markOriginal();
    return mixin;
  }

}