/*
* (non-Javadoc)
*
* @see net.jawr.web.resource.bundle.postprocess.
* AbstractChainedResourceBundlePostProcessor
* #doPostProcessBundle(net.jawr.web
* .resource.bundle.postprocess.BundleProcessingStatus,
* java.lang.StringBuffer)
*/
@Override
protected StringBuffer doPostProcessBundle(BundleProcessingStatus status, StringBuffer bundleData)
throws IOException {
if (jsEngine == null) {
initialize(status.getJawrConfig());
}
StopWatch stopWatch = new StopWatch();
stopWatch.start("Processing Autoprefixer on '" + status.getLastPathAdded() + "'");
String cssSource = bundleData.toString();
String res = null;
try {
res = (String) jsEngine.invokeFunction("process", cssSource, options);
} catch (NoSuchMethodException e) {
throw new BundlingProcessException(e);
} catch (ScriptException e) {
throw new BundlingProcessException(e);
}
stopWatch.stop();
if (PERF_LOGGER.isDebugEnabled()) {
PERF_LOGGER.debug(stopWatch.shortSummary());
}
return new StringBuffer(res);
}
/** Initialize the postprocessor */
private void initialize(JawrConfig config) {
StopWatch stopWatch = new StopWatch("Initializing JS engine for Autoprefixer");
stopWatch.start();
// Load JavaScript Script Engine
String script =
config.getProperty(AUTOPREFIXER_SCRIPT_LOCATION, AUTOPREFIXER_SCRIPT_DEFAULT_LOCATION);
String jsEngineName = config.getJavascriptEngineName(AUTOPREFIXER_JS_ENGINE);
jsEngine = new JavascriptEngine(jsEngineName, true);
jsEngine.getBindings().put("logger", PERF_LOGGER);
InputStream inputStream = getResourceInputStream(config, script);
jsEngine.evaluate("autoprefixer.js", inputStream);
String strOptions =
config.getProperty(AUTOPREFIXER_SCRIPT_OPTIONS, AUTOPREFIXER_DEFAULT_OPTIONS);
this.options = jsEngine.execEval(strOptions);
jsEngine.evaluate(
"initAutoPrefixer.js", String.format("processor = autoprefixer(%s);", strOptions));
jsEngine.evaluate(
"jawrAutoPrefixerProcess.js",
String.format(
"function process(cssSource, opts){"
+ "var result = processor.process(cssSource, opts);"
+ "if(result.warnings){"
+ "result.warnings().forEach(function(message){"
+ "if(logger.isWarnEnabled()){"
+ "logger.warn(message.toString());"
+ "}"
+ "});}"
+ "return result.css;"
+ "}"));
stopWatch.stop();
if (PERF_LOGGER.isDebugEnabled()) {
PERF_LOGGER.debug(stopWatch.shortSummary());
}
}