/scalate-core/src/main/scala/org/fusesource/scalate/filter/CssFilter.scala

/**
 * Copyright (C) 2009-2011 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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 org.fusesource.scalate.filter

/**
 * Copyright (C) 2009-2010 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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.
 */

import org.fusesource.scalate._
import org.fusesource.scalate.support.RenderHelper

/**
 * Surrounds the filtered text with <style> and CDATA tags.
 *
 * <p>Useful for including inline CSS.</p>
 *
 * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
 */
object CssFilter extends Filter {

  def filter(context: RenderContext, content: String) = {
    lazy val css = RenderHelper.indent("    ", content)

    if (useCData(context)) {
      """<style type='text/css'>
         |  /* <![CDATA[ */
         |    """.stripMargin + css + """
         |  /* ]]> */
         |</style>""".stripMargin
    } else {
      """<style type='text/css'>
         |  """.stripMargin + css + """
         |</style>""".stripMargin
    }
  }

  def useCData(context: RenderContext): Boolean =
    context.wrapCssInCData

}