br.com.objectos.css.io.CssWriter Maven / Gradle / Ivy

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/*
 * Copyright 2016 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.css.io;

import java.util.Objects;

/**
 * @author [email protected] (Marcio Endo)
 */
public abstract class CssWriter implements AutoCloseable {

  final Writer writer;

  CssWriter(Appendable out) {
    writer = new Writer(out);
  }

  public static CssWriter pretty(Appendable out) {
    Objects.requireNonNull(out);
    Indentation indentation = Indentation.standard();
    return new PrettyCssWriter(out, indentation);
  }

  public final CssWriter acceptAll(Iterable writables) {
    for (CssWritable writable : writables) {
      writable.writeTo(this);
    }
    return this;
  }

  public final CssWriter addDeclaration(String property, String value) {
    writeDeclaration(property, value);
    return this;
  }

  @Override
  public void close() {
    if (writer instanceof AutoCloseable) {
      try {
        ((AutoCloseable) writer).close();
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
  }

  public final CssWriter endRule() {
    writeEndRule();
    return this;
  }

  public final CssWriter startRule(String selector) {
    Objects.requireNonNull(selector);
    writeStartRule(selector);
    return this;
  }

  @Override
  public final String toString() {
    return writer.toString();
  }

  abstract void writeDeclaration(String property, String value);

  abstract void writeEndRule();

  abstract void writeStartRule(String selector);

}