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DefaultRenderContext.scala
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DefaultRenderContext.scala
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/**
* 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
import java.io._
import org.fusesource.scalate.support.AttributesHashMap
import org.fusesource.scalate.util.{ Log, Resource }
import scala.collection.mutable.Stack
object DefaultRenderContext extends Log
/**
* Default implementation of [[org.fusesource.scalate.RenderContext]]
*/
class DefaultRenderContext(
private[this] val _requestUri: String,
val engine: TemplateEngine,
var out: PrintWriter = new PrintWriter(new StringWriter())) extends RenderContext {
import DefaultRenderContext._
val attributes: AttributeMap = new AttributesHashMap() {
update("context", DefaultRenderContext.this)
}
escapeMarkup = engine.escapeMarkup
/////////////////////////////////////////////////////////////////////
//
// RenderContext implementation
//
//////////////////////////////////x///////////////////////////////////
def requestUri = _requestUri
def requestResource: Option[Resource] = engine.resourceLoader.resource(requestUri)
def requestFile: Option[File] = requestResource match {
case Some(r) => r.toFile
case _ => None
}
def <<(v: Any): Unit = {
out.print(value(v, false).toString)
}
def <<<(v: Any): Unit = {
out.print(value(v).toString)
}
private[this] val outStack = new Stack[PrintWriter]
/**
* Evaluates the body capturing any output written to this page context during the body evaluation
*/
def capture(body: => Unit): String = {
val buffer = new StringWriter()
outStack.push(out)
out = new PrintWriter(buffer)
try {
body
out.close()
buffer.toString
} finally {
out = outStack.pop
}
}
/**
* Evaluates the template capturing any output written to this page context during the body evaluation
*/
def capture(template: Template): String = {
val buffer = new StringWriter()
outStack.push(out)
out = new PrintWriter(buffer)
try {
debug("rendering template %s", template)
template.render(this)
out.close()
buffer.toString
} finally {
out = outStack.pop
}
}
def flush() = out.flush
}