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+/**
+ * Copyright 2009 Google Inc.
+ *
+ * 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.
+ */
+
+
+jimport("java.lang.System.err")
+jimport("yuicompressor.org.mozilla.javascript.ErrorReporter");
+jimport("com.yahoo.platform.yui.compressor.JavaScriptCompressor")
+jimport("com.yahoo.platform.yui.compressor.CssCompressor")
+jimport("java.io.StringReader");
+jimport("java.io.StringWriter");
+
+/**
+ * Compresses the given JavaScript code into an equivalent, shorter string of code using
+ * YUICompressor. In addition to removing white-space and comments, YUICompressor
+ * does a full semantic parse of the code and renames non-global variables to have
+ * very short names. Scopes that are visible to "eval" and "with" are excluded from
+ * variable renaming, making the operation very safe.
+ * <p>
+ * For example,
+ * yuicompressor.compressJS("function foo() { var longVariableName = 3; return longVariableName }");
+ * produces
+ * "function foo(){var A=3;return A;}"
+ */
+
+function compressJS(code) {
+ function getComplaint(message, sourceName, line, lineSource, lineOffset) {
+ if (line < 0) return message;
+ else return (line+":"+lineOffset+":"+message);
+ }
+ function complaintHandler(func) {
+ return function(message, sourceName, line, lineSource, lineOffset) {
+ return func(getComplaint(message, sourceName, line, lineSource, lineOffset));
+ }
+ }
+ var myErrorReporter = new JavaAdapter(ErrorReporter, {
+ warning: complaintHandler(function (msg) {
+ if (msg.indexOf("Try to use a single 'var' statement per scope.") >= 0)
+ return;
+ err.println("yuicompressor.compressJS warning: "+msg);
+ }),
+ error: complaintHandler(function (msg) {
+ throw new Error("yuicompressor.compressJS error: "+msg);
+ }),
+ runtimeError: complaintHandler(function (msg) {
+ throw new Error("yuicompressor.compressJS error: "+msg);
+ })
+ });
+
+ var munge = true;
+ var verbose = false;
+ var optimize = true;
+ var wrapPos = 100; // characters, no wrap == -1
+ var compressor = new JavaScriptCompressor(new StringReader(code), myErrorReporter);
+ var writer = new StringWriter();
+ compressor.compress(writer, 100, munge, verbose, true, !optimize);
+ return String(writer.toString());
+}
+
+/**
+ * Compresses the given CSS code into an equivalent, shorter string of code using
+ * YUICompressor. Besides removing unnecessary white-space and comments, the operation
+ * performs an assortment of semantics-preserving optimizations. The operation attempts
+ * to preserve common "hacks" that take advantage of browser differences in parsing.
+ */
+
+function compressCSS(code) {
+ var compressor = new CssCompressor(new StringReader(code));
+ var wrapPos = 100; // characters, no wrap == -1
+ var writer = new StringWriter();
+ compressor.compress(writer, wrapPos);
+ return String(writer.toString());
+}