/**
* Minifies CSS file.
*
* @param mergedFile input file resulting from the merged step
* @param minifiedFile output file resulting from the minify step
*/
@Override
protected void minify(File mergedFile, File minifiedFile) throws IOException {
if (minifiedFile != null) {
try {
log.info(
"Creating minified file ["
+ ((debug) ? minifiedFile.getPath() : minifiedFile.getName())
+ "].");
InputStream in = new FileInputStream(mergedFile);
OutputStream out = new FileOutputStream(minifiedFile);
InputStreamReader reader;
OutputStreamWriter writer;
if (charset == null) {
reader = new InputStreamReader(in);
writer = new OutputStreamWriter(out);
} else {
reader = new InputStreamReader(in, charset);
writer = new OutputStreamWriter(out, charset);
}
CssCompressor compressor = new CssCompressor(reader);
compressor.compress(writer, linebreak);
IOUtil.close(reader);
IOUtil.close(writer);
IOUtil.close(in);
IOUtil.close(out);
} catch (IOException e) {
log.error(e.getMessage(), e);
throw e;
}
}
}
/** {@inheritDoc} */
@Override
protected InputStream wrapWithMinify(InputStream is) throws IOException {
CssCompressor compressor = new CssCompressor(new InputStreamReader(is));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintWriter writer = new PrintWriter(baos);
compressor.compress(writer, LINEBREAK);
writer.close();
return new ByteArrayInputStream(baos.toByteArray());
}
@Override
protected void doProcess(Asset asset, Reader reader, Writer writer) throws Exception {
try {
CssCompressor compressor = new CssCompressor(reader);
compressor.compress(writer, -1);
} catch (IOException e) {
LOG.error("YUI compressor can't access to the content of {}", asset.toLog());
throw DandelionException.wrap(e);
}
}
@Override
public void transform(InputStream input, OutputStream output) throws IOException {
// prepare input reader
Reader reader = new InputStreamReader(input, charset);
CssCompressor compressor = new CssCompressor(reader);
// write compressed output
OutputStreamWriter writer = new OutputStreamWriter(output, charset);
compressor.compress(writer, 0);
writer.flush();
}
private String _minifyCss(String content) {
UnsyncStringWriter unsyncStringWriter = new UnsyncStringWriter();
try {
CssCompressor cssCompressor = new CssCompressor(new UnsyncStringReader(content));
cssCompressor.compress(unsyncStringWriter, PropsValues.YUI_COMPRESSOR_CSS_LINE_BREAK);
} catch (Exception e) {
_log.error("CSS Minifier failed for\n" + content);
unsyncStringWriter.append(content);
}
return unsyncStringWriter.toString();
}
/** {@inheritDoc} */
public void process(final Resource resource, final Reader reader, final Writer writer)
throws IOException {
try {
final CssCompressor compressor = new CssCompressor(reader);
compressor.compress(writer, linebreakpos);
} catch (IOException e) {
LOG.error(
"Exception occured while processing resource: "
+ resource
+ " using processor: "
+ ALIAS);
onException(
new WroRuntimeException(
"Exception during YuiCss processing of resource: " + resource, e));
} finally {
reader.close();
writer.close();
}
}
/**
* 压缩css,js帮助
*
* @param isCss
* @param out
* @return
*/
private static boolean compressorHelper(List<String> fileList, boolean isCss, Writer out) {
Reader in = null;
try {
if (isCss) {
for (String path : fileList) {
String filePath = PathKit.getWebRootPath() + path;
in = new InputStreamReader(new FileInputStream(filePath), CHARSET);
if (path.indexOf(".min.") > 0) { // 对.min.css的css放弃压缩
out.append(repairCss(IOUtils.toString(in), path));
} else {
CssCompressor css =
new CssCompressor(new StringReader(repairCss(IOUtils.toString(in), path)));
in.close();
in = null;
css.compress(out, -1);
}
}
} else {
// nomunge: 混淆,verbose：显示信息消息和警告,preserveAllSemiColons：保留所有的分号 ,disableOptimizations 禁止优化
boolean munge = true,
verbose = false,
preserveAllSemiColons = false,
disableOptimizations = false;
for (String path : fileList) {
String filePath = PathKit.getWebRootPath() + path;
in = new InputStreamReader(new FileInputStream(filePath), CHARSET);
if (path.indexOf(".min.") > 0) { // 对.min.js的js放弃压缩
out.append(IOUtils.toString(in));
} else {
JavaScriptCompressor compressor =
new JavaScriptCompressor(
in,
new ErrorReporter() {
public void warning(
String message,
String sourceName,
int line,
String lineSource,
int lineOffset) {
if (line < 0) {
log.error("\n[WARNING] " + message);
} else {
log.error("\n[WARNING] " + line + ':' + lineOffset + ':' + message);
}
}
public void error(
String message,
String sourceName,
int line,
String lineSource,
int lineOffset) {
if (line < 0) {
log.error("\n[ERROR] " + message);
} else {
log.error("\n[ERROR] " + line + ':' + lineOffset + ':' + message);
}
}
public EvaluatorException runtimeError(
String message,
String sourceName,
int line,
String lineSource,
int lineOffset) {
error(message, sourceName, line, lineSource, lineOffset);
return new EvaluatorException(message);
}
});
in.close();
in = null;
compressor.compress(
out, -1, munge, verbose, preserveAllSemiColons, disableOptimizations);
}
}
}
out.flush();
return true;
} catch (IOException e) {
log.error(e.getMessage());
return false;
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
}
}