aboutsummaryrefslogtreecommitdiffstats
path: root/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor')
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/Bootstrap.java22
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/CssCompressor.java188
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java158
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptCompressor.java1307
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptIdentifier.java55
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptToken.java28
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/ScriptOrFnScope.java169
-rw-r--r--trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/YUICompressor.java232
8 files changed, 2159 insertions, 0 deletions
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/Bootstrap.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/Bootstrap.java
new file mode 100644
index 0000000..1b95aca
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/Bootstrap.java
@@ -0,0 +1,22 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import java.lang.reflect.Method;
+
+public class Bootstrap {
+
+ public static void main(String args[]) throws Exception {
+ ClassLoader loader = new JarClassLoader();
+ Thread.currentThread().setContextClassLoader(loader);
+ Class c = loader.loadClass(YUICompressor.class.getName());
+ Method main = c.getMethod("main", new Class[]{String[].class});
+ main.invoke(null, new Object[]{args});
+ }
+} \ No newline at end of file
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/CssCompressor.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/CssCompressor.java
new file mode 100644
index 0000000..68b4de9
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/CssCompressor.java
@@ -0,0 +1,188 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ *
+ * This code is a port of Isaac Schlueter's cssmin utility.
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+public class CssCompressor {
+
+ private StringBuffer srcsb = new StringBuffer();
+
+ public CssCompressor(Reader in) throws IOException {
+ // Read the stream...
+ int c;
+ while ((c = in.read()) != -1) {
+ srcsb.append((char) c);
+ }
+ }
+
+ public void compress(Writer out, int linebreakpos)
+ throws IOException {
+
+ Pattern p;
+ Matcher m;
+ String css;
+ StringBuffer sb;
+ int startIndex, endIndex;
+
+ // Remove all comment blocks...
+ startIndex = 0;
+ boolean iemac = false;
+ boolean preserve = false;
+ sb = new StringBuffer(srcsb.toString());
+ while ((startIndex = sb.indexOf("/*", startIndex)) >= 0) {
+ preserve = sb.length() > startIndex + 2 && sb.charAt(startIndex + 2) == '!';
+ endIndex = sb.indexOf("*/", startIndex + 2);
+ if (endIndex < 0) {
+ if (!preserve) {
+ sb.delete(startIndex, sb.length());
+ }
+ } else if (endIndex >= startIndex + 2) {
+ if (sb.charAt(endIndex-1) == '\\') {
+ // Looks like a comment to hide rules from IE Mac.
+ // Leave this comment, and the following one, alone...
+ startIndex = endIndex + 2;
+ iemac = true;
+ } else if (iemac) {
+ startIndex = endIndex + 2;
+ iemac = false;
+ } else if (!preserve) {
+ sb.delete(startIndex, endIndex + 2);
+ } else {
+ startIndex = endIndex + 2;
+ }
+ }
+ }
+
+ css = sb.toString();
+
+ // Normalize all whitespace strings to single spaces. Easier to work with that way.
+ css = css.replaceAll("\\s+", " ");
+
+ // Make a pseudo class for the Box Model Hack
+ css = css.replaceAll("\"\\\\\"}\\\\\"\"", "___PSEUDOCLASSBMH___");
+
+ // Remove the spaces before the things that should not have spaces before them.
+ // But, be careful not to turn "p :link {...}" into "p:link{...}"
+ // Swap out any pseudo-class colons with the token, and then swap back.
+ sb = new StringBuffer();
+ p = Pattern.compile("(^|\\})(([^\\{:])+:)+([^\\{]*\\{)");
+ m = p.matcher(css);
+ while (m.find()) {
+ String s = m.group();
+ s = s.replaceAll(":", "___PSEUDOCLASSCOLON___");
+ m.appendReplacement(sb, s);
+ }
+ m.appendTail(sb);
+ css = sb.toString();
+ css = css.replaceAll("\\s+([!{};:>+\\(\\)\\],])", "$1");
+ css = css.replaceAll("___PSEUDOCLASSCOLON___", ":");
+
+ // Remove the spaces after the things that should not have spaces after them.
+ css = css.replaceAll("([!{}:;>+\\(\\[,])\\s+", "$1");
+
+ // Add the semicolon where it's missing.
+ css = css.replaceAll("([^;\\}])}", "$1;}");
+
+ // Replace 0(px,em,%) with 0.
+ css = css.replaceAll("([\\s:])(0)(px|em|%|in|cm|mm|pc|pt|ex)", "$1$2");
+
+ // Replace 0 0 0 0; with 0.
+ css = css.replaceAll(":0 0 0 0;", ":0;");
+ css = css.replaceAll(":0 0 0;", ":0;");
+ css = css.replaceAll(":0 0;", ":0;");
+ // Replace background-position:0; with background-position:0 0;
+ css = css.replaceAll("background-position:0;", "background-position:0 0;");
+
+ // Replace 0.6 to .6, but only when preceded by : or a white-space
+ css = css.replaceAll("(:|\\s)0+\\.(\\d+)", "$1.$2");
+
+ // Shorten colors from rgb(51,102,153) to #336699
+ // This makes it more likely that it'll get further compressed in the next step.
+ p = Pattern.compile("rgb\\s*\\(\\s*([0-9,\\s]+)\\s*\\)");
+ m = p.matcher(css);
+ sb = new StringBuffer();
+ while (m.find()) {
+ String[] rgbcolors = m.group(1).split(",");
+ StringBuffer hexcolor = new StringBuffer("#");
+ for (int i = 0; i < rgbcolors.length; i++) {
+ int val = Integer.parseInt(rgbcolors[i]);
+ if (val < 16) {
+ hexcolor.append("0");
+ }
+ hexcolor.append(Integer.toHexString(val));
+ }
+ m.appendReplacement(sb, hexcolor.toString());
+ }
+ m.appendTail(sb);
+ css = sb.toString();
+
+ // Shorten colors from #AABBCC to #ABC. Note that we want to make sure
+ // the color is not preceded by either ", " or =. Indeed, the property
+ // filter: chroma(color="#FFFFFF");
+ // would become
+ // filter: chroma(color="#FFF");
+ // which makes the filter break in IE.
+ p = Pattern.compile("([^\"'=\\s])(\\s*)#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])");
+ m = p.matcher(css);
+ sb = new StringBuffer();
+ while (m.find()) {
+ // Test for AABBCC pattern
+ if (m.group(3).equalsIgnoreCase(m.group(4)) &&
+ m.group(5).equalsIgnoreCase(m.group(6)) &&
+ m.group(7).equalsIgnoreCase(m.group(8))) {
+ m.appendReplacement(sb, m.group(1) + m.group(2) + "#" + m.group(3) + m.group(5) + m.group(7));
+ } else {
+ m.appendReplacement(sb, m.group());
+ }
+ }
+ m.appendTail(sb);
+ css = sb.toString();
+
+ // Remove empty rules.
+ css = css.replaceAll("[^\\}]+\\{;\\}", "");
+
+ if (linebreakpos >= 0) {
+ // Some source control tools don't like it when files containing lines longer
+ // than, say 8000 characters, are checked in. The linebreak option is used in
+ // that case to split long lines after a specific column.
+ int i = 0;
+ int linestartpos = 0;
+ sb = new StringBuffer(css);
+ while (i < sb.length()) {
+ char c = sb.charAt(i++);
+ if (c == '}' && i - linestartpos > linebreakpos) {
+ sb.insert(i, '\n');
+ linestartpos = i;
+ }
+ }
+
+ css = sb.toString();
+ }
+
+ // Replace the pseudo class for the Box Model Hack
+ css = css.replaceAll("___PSEUDOCLASSBMH___", "\"\\\\\"}\\\\\"\"");
+
+ // Replace multiple semi-colons in a row by a single one
+ // See SF bug #1980989
+ css = css.replaceAll(";;+", ";");
+
+ // Trim the final string (for any leading or trailing white spaces)
+ css = css.trim();
+
+ // Write the output...
+ out.write(css);
+ }
+}
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java
new file mode 100644
index 0000000..a6d3e13
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java
@@ -0,0 +1,158 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Enumeration;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+public class JarClassLoader extends ClassLoader {
+
+ private static String jarPath;
+
+ public Class loadClass(String name) throws ClassNotFoundException {
+
+ // First check if the class is already loaded
+ Class c = findLoadedClass(name);
+ if (c == null) {
+ c = findClass(name);
+ }
+
+ if (c == null) {
+ c = ClassLoader.getSystemClassLoader().loadClass(name);
+ }
+
+ return c;
+ }
+
+ private static String getJarPath() {
+
+ if (jarPath != null) {
+ return jarPath;
+ }
+
+ String classname = JarClassLoader.class.getName().replace('.', '/') + ".class";
+ String classpath = System.getProperty("java.class.path");
+ String classpaths[] = classpath.split(System.getProperty("path.separator"));
+
+ for (int i = 0; i < classpaths.length; i++) {
+
+ String path = classpaths[i];
+ JarFile jarFile = null;
+ JarEntry jarEntry = null;
+
+ try {
+ jarFile = new JarFile(path);
+ jarEntry = findJarEntry(jarFile, classname);
+ } catch (IOException ioe) {
+ /* ignore */
+ } finally {
+ if (jarFile != null) {
+ try {
+ jarFile.close();
+ } catch (IOException ioe) {
+ /* ignore */
+ }
+ }
+ }
+
+ if (jarEntry != null) {
+ jarPath = path;
+ break;
+ }
+ }
+
+ return jarPath;
+ }
+
+ private static JarEntry findJarEntry(JarFile jarFile, String entryName) {
+
+ Enumeration entries = jarFile.entries();
+
+ while (entries.hasMoreElements()) {
+ JarEntry entry = (JarEntry) entries.nextElement();
+ if (entry.getName().equals(entryName)) {
+ return entry;
+ }
+ }
+
+ return null;
+ }
+
+ protected Class findClass(String name) {
+
+ Class c = null;
+ String jarPath = getJarPath();
+
+ if (jarPath != null) {
+ JarFile jarFile = null;
+ try {
+ jarFile = new JarFile(jarPath);
+ c = loadClassData(jarFile, name);
+ } catch (IOException ioe) {
+ /* ignore */
+ } finally {
+ if (jarFile != null) {
+ try {
+ jarFile.close();
+ } catch (IOException ioe) {
+ /* ignore */
+ }
+ }
+ }
+ }
+
+ return c;
+ }
+
+ private Class loadClassData(JarFile jarFile, String className) {
+
+ String entryName = className.replace('.', '/') + ".class";
+ JarEntry jarEntry = findJarEntry(jarFile, entryName);
+ if (jarEntry == null) {
+ return null;
+ }
+
+ // Create the necessary package if needed...
+ int index = className.lastIndexOf('.');
+ if (index >= 0) {
+ String packageName = className.substring(0, index);
+ if (getPackage(packageName) == null) {
+ definePackage(packageName, "", "", "", "", "", "", null);
+ }
+ }
+
+ // Read the Jar File entry and define the class...
+ Class c = null;
+ try {
+ InputStream is = jarFile.getInputStream(jarEntry);
+ ByteArrayOutputStream os = new ByteArrayOutputStream();
+ copy(is, os);
+ byte[] bytes = os.toByteArray();
+ c = defineClass(className, bytes, 0, bytes.length);
+ } catch (IOException ioe) {
+ /* ignore */
+ }
+
+ return c;
+ }
+
+ private void copy(InputStream in, OutputStream out) throws IOException {
+ byte[] buf = new byte[1024];
+ while (true) {
+ int len = in.read(buf);
+ if (len < 0) break;
+ out.write(buf, 0, len);
+ }
+ }
+} \ No newline at end of file
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptCompressor.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptCompressor.java
new file mode 100644
index 0000000..e69ae1a
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptCompressor.java
@@ -0,0 +1,1307 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import yuicompressor.org.mozilla.javascript.*;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class JavaScriptCompressor {
+
+ static final ArrayList ones;
+ static final ArrayList twos;
+ static final ArrayList threes;
+
+ static final Set builtin = new HashSet();
+ static final Map literals = new Hashtable();
+ static final Set reserved = new HashSet();
+
+ static {
+
+ // This list contains all the 3 characters or less built-in global
+ // symbols available in a browser. Please add to this list if you
+ // see anything missing.
+ builtin.add("NaN");
+ builtin.add("top");
+
+ ones = new ArrayList();
+ for (char c = 'A'; c <= 'Z'; c++)
+ ones.add(Character.toString(c));
+ for (char c = 'a'; c <= 'z'; c++)
+ ones.add(Character.toString(c));
+
+ twos = new ArrayList();
+ for (int i = 0; i < ones.size(); i++) {
+ String one = (String) ones.get(i);
+ for (char c = 'A'; c <= 'Z'; c++)
+ twos.add(one + Character.toString(c));
+ for (char c = 'a'; c <= 'z'; c++)
+ twos.add(one + Character.toString(c));
+ for (char c = '0'; c <= '9'; c++)
+ twos.add(one + Character.toString(c));
+ }
+
+ // Remove two-letter JavaScript reserved words and built-in globals...
+ twos.remove("as");
+ twos.remove("is");
+ twos.remove("do");
+ twos.remove("if");
+ twos.remove("in");
+ twos.removeAll(builtin);
+
+ threes = new ArrayList();
+ for (int i = 0; i < twos.size(); i++) {
+ String two = (String) twos.get(i);
+ for (char c = 'A'; c <= 'Z'; c++)
+ threes.add(two + Character.toString(c));
+ for (char c = 'a'; c <= 'z'; c++)
+ threes.add(two + Character.toString(c));
+ for (char c = '0'; c <= '9'; c++)
+ threes.add(two + Character.toString(c));
+ }
+
+ // Remove three-letter JavaScript reserved words and built-in globals...
+ threes.remove("for");
+ threes.remove("int");
+ threes.remove("new");
+ threes.remove("try");
+ threes.remove("use");
+ threes.remove("var");
+ threes.removeAll(builtin);
+
+ // That's up to ((26+26)*(1+(26+26+10)))*(1+(26+26+10))-8
+ // (206,380 symbols per scope)
+
+ // The following list comes from org/mozilla/javascript/Decompiler.java...
+ literals.put(new Integer(Token.GET), "get ");
+ literals.put(new Integer(Token.SET), "set ");
+ literals.put(new Integer(Token.TRUE), "true");
+ literals.put(new Integer(Token.FALSE), "false");
+ literals.put(new Integer(Token.NULL), "null");
+ literals.put(new Integer(Token.THIS), "this");
+ literals.put(new Integer(Token.FUNCTION), "function");
+ literals.put(new Integer(Token.COMMA), ",");
+ literals.put(new Integer(Token.LC), "{");
+ literals.put(new Integer(Token.RC), "}");
+ literals.put(new Integer(Token.LP), "(");
+ literals.put(new Integer(Token.RP), ")");
+ literals.put(new Integer(Token.LB), "[");
+ literals.put(new Integer(Token.RB), "]");
+ literals.put(new Integer(Token.DOT), ".");
+ literals.put(new Integer(Token.NEW), "new ");
+ literals.put(new Integer(Token.DELPROP), "delete ");
+ literals.put(new Integer(Token.IF), "if");
+ literals.put(new Integer(Token.ELSE), "else");
+ literals.put(new Integer(Token.FOR), "for");
+ literals.put(new Integer(Token.IN), " in ");
+ literals.put(new Integer(Token.WITH), "with");
+ literals.put(new Integer(Token.WHILE), "while");
+ literals.put(new Integer(Token.DO), "do");
+ literals.put(new Integer(Token.TRY), "try");
+ literals.put(new Integer(Token.CATCH), "catch");
+ literals.put(new Integer(Token.FINALLY), "finally");
+ literals.put(new Integer(Token.THROW), "throw");
+ literals.put(new Integer(Token.SWITCH), "switch");
+ literals.put(new Integer(Token.BREAK), "break");
+ literals.put(new Integer(Token.CONTINUE), "continue");
+ literals.put(new Integer(Token.CASE), "case");
+ literals.put(new Integer(Token.DEFAULT), "default");
+ literals.put(new Integer(Token.RETURN), "return");
+ literals.put(new Integer(Token.VAR), "var ");
+ literals.put(new Integer(Token.SEMI), ";");
+ literals.put(new Integer(Token.ASSIGN), "=");
+ literals.put(new Integer(Token.ASSIGN_ADD), "+=");
+ literals.put(new Integer(Token.ASSIGN_SUB), "-=");
+ literals.put(new Integer(Token.ASSIGN_MUL), "*=");
+ literals.put(new Integer(Token.ASSIGN_DIV), "/=");
+ literals.put(new Integer(Token.ASSIGN_MOD), "%=");
+ literals.put(new Integer(Token.ASSIGN_BITOR), "|=");
+ literals.put(new Integer(Token.ASSIGN_BITXOR), "^=");
+ literals.put(new Integer(Token.ASSIGN_BITAND), "&=");
+ literals.put(new Integer(Token.ASSIGN_LSH), "<<=");
+ literals.put(new Integer(Token.ASSIGN_RSH), ">>=");
+ literals.put(new Integer(Token.ASSIGN_URSH), ">>>=");
+ literals.put(new Integer(Token.HOOK), "?");
+ literals.put(new Integer(Token.OBJECTLIT), ":");
+ literals.put(new Integer(Token.COLON), ":");
+ literals.put(new Integer(Token.OR), "||");
+ literals.put(new Integer(Token.AND), "&&");
+ literals.put(new Integer(Token.BITOR), "|");
+ literals.put(new Integer(Token.BITXOR), "^");
+ literals.put(new Integer(Token.BITAND), "&");
+ literals.put(new Integer(Token.SHEQ), "===");
+ literals.put(new Integer(Token.SHNE), "!==");
+ literals.put(new Integer(Token.EQ), "==");
+ literals.put(new Integer(Token.NE), "!=");
+ literals.put(new Integer(Token.LE), "<=");
+ literals.put(new Integer(Token.LT), "<");
+ literals.put(new Integer(Token.GE), ">=");
+ literals.put(new Integer(Token.GT), ">");
+ literals.put(new Integer(Token.INSTANCEOF), " instanceof ");
+ literals.put(new Integer(Token.LSH), "<<");
+ literals.put(new Integer(Token.RSH), ">>");
+ literals.put(new Integer(Token.URSH), ">>>");
+ literals.put(new Integer(Token.TYPEOF), "typeof");
+ literals.put(new Integer(Token.VOID), "void ");
+ literals.put(new Integer(Token.CONST), "const ");
+ literals.put(new Integer(Token.NOT), "!");
+ literals.put(new Integer(Token.BITNOT), "~");
+ literals.put(new Integer(Token.POS), "+");
+ literals.put(new Integer(Token.NEG), "-");
+ literals.put(new Integer(Token.INC), "++");
+ literals.put(new Integer(Token.DEC), "--");
+ literals.put(new Integer(Token.ADD), "+");
+ literals.put(new Integer(Token.SUB), "-");
+ literals.put(new Integer(Token.MUL), "*");
+ literals.put(new Integer(Token.DIV), "/");
+ literals.put(new Integer(Token.MOD), "%");
+ literals.put(new Integer(Token.COLONCOLON), "::");
+ literals.put(new Integer(Token.DOTDOT), "..");
+ literals.put(new Integer(Token.DOTQUERY), ".(");
+ literals.put(new Integer(Token.XMLATTR), "@");
+
+ // See http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Reserved_Words
+
+ // JavaScript 1.5 reserved words
+ reserved.add("break");
+ reserved.add("case");
+ reserved.add("catch");
+ reserved.add("continue");
+ reserved.add("default");
+ reserved.add("delete");
+ reserved.add("do");
+ reserved.add("else");
+ reserved.add("finally");
+ reserved.add("for");
+ reserved.add("function");
+ reserved.add("if");
+ reserved.add("in");
+ reserved.add("instanceof");
+ reserved.add("new");
+ reserved.add("return");
+ reserved.add("switch");
+ reserved.add("this");
+ reserved.add("throw");
+ reserved.add("try");
+ reserved.add("typeof");
+ reserved.add("var");
+ reserved.add("void");
+ reserved.add("while");
+ reserved.add("with");
+ // Words reserved for future use
+ reserved.add("abstract");
+ reserved.add("boolean");
+ reserved.add("byte");
+ reserved.add("char");
+ reserved.add("class");
+ reserved.add("const");
+ reserved.add("debugger");
+ reserved.add("double");
+ reserved.add("enum");
+ reserved.add("export");
+ reserved.add("extends");
+ reserved.add("final");
+ reserved.add("float");
+ reserved.add("goto");
+ reserved.add("implements");
+ reserved.add("import");
+ reserved.add("int");
+ reserved.add("interface");
+ reserved.add("long");
+ reserved.add("native");
+ reserved.add("package");
+ reserved.add("private");
+ reserved.add("protected");
+ reserved.add("public");
+ reserved.add("short");
+ reserved.add("static");
+ reserved.add("super");
+ reserved.add("synchronized");
+ reserved.add("throws");
+ reserved.add("transient");
+ reserved.add("volatile");
+ // These are not reserved, but should be taken into account
+ // in isValidIdentifier (See jslint source code)
+ reserved.add("arguments");
+ reserved.add("eval");
+ reserved.add("true");
+ reserved.add("false");
+ reserved.add("Infinity");
+ reserved.add("NaN");
+ reserved.add("null");
+ reserved.add("undefined");
+ }
+
+ private static int countChar(String haystack, char needle) {
+ int idx = 0;
+ int count = 0;
+ int length = haystack.length();
+ while (idx < length) {
+ char c = haystack.charAt(idx++);
+ if (c == needle) {
+ count++;
+ }
+ }
+ return count;
+ }
+
+ private static int printSourceString(String source, int offset, StringBuffer sb) {
+ int length = source.charAt(offset);
+ ++offset;
+ if ((0x8000 & length) != 0) {
+ length = ((0x7FFF & length) << 16) | source.charAt(offset);
+ ++offset;
+ }
+ if (sb != null) {
+ String str = source.substring(offset, offset + length);
+ sb.append(str);
+ }
+ return offset + length;
+ }
+
+ private static int printSourceNumber(String source,
+ int offset, StringBuffer sb) {
+ double number = 0.0;
+ char type = source.charAt(offset);
+ ++offset;
+ if (type == 'S') {
+ if (sb != null) {
+ number = source.charAt(offset);
+ }
+ ++offset;
+ } else if (type == 'J' || type == 'D') {
+ if (sb != null) {
+ long lbits;
+ lbits = (long) source.charAt(offset) << 48;
+ lbits |= (long) source.charAt(offset + 1) << 32;
+ lbits |= (long) source.charAt(offset + 2) << 16;
+ lbits |= (long) source.charAt(offset + 3);
+ if (type == 'J') {
+ number = lbits;
+ } else {
+ number = Double.longBitsToDouble(lbits);
+ }
+ }
+ offset += 4;
+ } else {
+ // Bad source
+ throw new RuntimeException();
+ }
+ if (sb != null) {
+ sb.append(ScriptRuntime.numberToString(number, 10));
+ }
+ return offset;
+ }
+
+ private static ArrayList parse(Reader in, ErrorReporter reporter)
+ throws IOException, EvaluatorException {
+
+ CompilerEnvirons env = new CompilerEnvirons();
+ Parser parser = new Parser(env, reporter);
+ parser.parse(in, null, 1);
+ String source = parser.getEncodedSource();
+
+ int offset = 0;
+ int length = source.length();
+ ArrayList tokens = new ArrayList();
+ StringBuffer sb = new StringBuffer();
+
+ while (offset < length) {
+ int tt = source.charAt(offset++);
+ switch (tt) {
+
+ case Token.SPECIALCOMMENT:
+ case Token.NAME:
+ case Token.REGEXP:
+ case Token.STRING:
+ sb.setLength(0);
+ offset = printSourceString(source, offset, sb);
+ tokens.add(new JavaScriptToken(tt, sb.toString()));
+ break;
+
+ case Token.NUMBER:
+ sb.setLength(0);
+ offset = printSourceNumber(source, offset, sb);
+ tokens.add(new JavaScriptToken(tt, sb.toString()));
+ break;
+
+ default:
+ String literal = (String) literals.get(new Integer(tt));
+ if (literal != null) {
+ tokens.add(new JavaScriptToken(tt, literal));
+ }
+ break;
+ }
+ }
+
+ return tokens;
+ }
+
+ private static void processStringLiterals(ArrayList tokens, boolean merge) {
+
+ String tv;
+ int i, length = tokens.size();
+ JavaScriptToken token, prevToken, nextToken;
+
+ if (merge) {
+
+ // Concatenate string literals that are being appended wherever
+ // it is safe to do so. Note that we take care of the case:
+ // "a" + "b".toUpperCase()
+
+ for (i = 0; i < length; i++) {
+ token = (JavaScriptToken) tokens.get(i);
+ switch (token.getType()) {
+
+ case Token.ADD:
+ if (i > 0 && i < length) {
+ prevToken = (JavaScriptToken) tokens.get(i - 1);
+ nextToken = (JavaScriptToken) tokens.get(i + 1);
+ if (prevToken.getType() == Token.STRING && nextToken.getType() == Token.STRING &&
+ (i == length - 1 || ((JavaScriptToken) tokens.get(i + 2)).getType() != Token.DOT)) {
+ tokens.set(i - 1, new JavaScriptToken(Token.STRING,
+ prevToken.getValue() + nextToken.getValue()));
+ tokens.remove(i + 1);
+ tokens.remove(i);
+ i = i - 1;
+ length = length - 2;
+ break;
+ }
+ }
+ }
+ }
+
+ }
+
+ // Second pass...
+
+ for (i = 0; i < length; i++) {
+ // APPJET modifications in this loop
+ token = (JavaScriptToken) tokens.get(i);
+ if (token.getType() == Token.STRING || token.getType() == Token.REGEXP) {
+ tv = token.getValue();
+ if (token.getType() == Token.STRING) {
+
+ // Finally, add the quoting characters and escape the string. We use
+ // the quoting character that minimizes the amount of escaping to save
+ // a few additional bytes.
+
+ char quotechar;
+ int singleQuoteCount = countChar(tv, '\'');
+ int doubleQuoteCount = countChar(tv, '"');
+ if (doubleQuoteCount <= singleQuoteCount) {
+ quotechar = '"';
+ } else {
+ quotechar = '\'';
+ }
+
+ tv = quotechar + escapeString(tv, quotechar) + quotechar;
+ }
+
+ // String concatenation transforms the old script scheme:
+ // '<scr'+'ipt ...><'+'/script>'
+ // into the following:
+ // '<script ...></script>'
+ // which breaks if this code is embedded inside an HTML document.
+ // Since this is not the right way to do this, let's fix the code by
+ // transforming all "</script" into "<\/script"
+
+ // (Anti-malware software can be sensitive to open tags)
+ tv = tv.replace("<script", "\\x3cscript");
+ tv = tv.replace("</script", "\\x3c/script");
+
+ tokens.set(i, new JavaScriptToken(token.getType(), tv));
+ }
+ }
+ }
+
+ // Add necessary escaping that was removed in Rhino's tokenizer.
+ private static String escapeString(String s, char quotechar) {
+
+ assert quotechar == '"' || quotechar == '\'';
+
+ if (s == null) {
+ return null;
+ }
+
+ StringBuffer sb = new StringBuffer();
+ for (int i = 0, L = s.length(); i < L; i++) {
+ int c = s.charAt(i);
+ if (c == quotechar) {
+ sb.append("\\");
+ }
+ sb.append((char) c);
+ }
+
+ return sb.toString();
+ }
+
+ /*
+ * Simple check to see whether a string is a valid identifier name.
+ * If a string matches this pattern, it means it IS a valid
+ * identifier name. If a string doesn't match it, it does not
+ * necessarily mean it is not a valid identifier name.
+ */
+ private static final Pattern SIMPLE_IDENTIFIER_NAME_PATTERN = Pattern.compile("^[a-zA-Z_][a-zA-Z0-9_]*$");
+
+ private static boolean isValidIdentifier(String s) {
+ Matcher m = SIMPLE_IDENTIFIER_NAME_PATTERN.matcher(s);
+ return (m.matches() && !reserved.contains(s));
+ }
+
+ /*
+ * Transforms obj["foo"] into obj.foo whenever possible, saving 3 bytes.
+ */
+ private static void optimizeObjectMemberAccess(ArrayList tokens) {
+
+ String tv;
+ int i, length;
+ JavaScriptToken token;
+
+ for (i = 0, length = tokens.size(); i < length; i++) {
+
+ if (((JavaScriptToken) tokens.get(i)).getType() == Token.LB &&
+ i > 0 && i < length - 2 &&
+ ((JavaScriptToken) tokens.get(i - 1)).getType() == Token.NAME &&
+ ((JavaScriptToken) tokens.get(i + 1)).getType() == Token.STRING &&
+ ((JavaScriptToken) tokens.get(i + 2)).getType() == Token.RB) {
+ token = (JavaScriptToken) tokens.get(i + 1);
+ tv = token.getValue();
+ tv = tv.substring(1, tv.length() - 1);
+ if (isValidIdentifier(tv)) {
+ tokens.set(i, new JavaScriptToken(Token.DOT, "."));
+ tokens.set(i + 1, new JavaScriptToken(Token.NAME, tv));
+ tokens.remove(i + 2);
+ i = i + 2;
+ length = length - 1;
+ }
+ }
+ }
+ }
+
+ /*
+ * Transforms 'foo': ... into foo: ... whenever possible, saving 2 bytes.
+ */
+ private static void optimizeObjLitMemberDecl(ArrayList tokens) {
+
+ String tv;
+ int i, length;
+ JavaScriptToken token;
+
+ for (i = 0, length = tokens.size(); i < length; i++) {
+ if (((JavaScriptToken) tokens.get(i)).getType() == Token.OBJECTLIT &&
+ i > 0 && ((JavaScriptToken) tokens.get(i - 1)).getType() == Token.STRING) {
+ token = (JavaScriptToken) tokens.get(i - 1);
+ tv = token.getValue();
+ tv = tv.substring(1, tv.length() - 1);
+ if (isValidIdentifier(tv)) {
+ tokens.set(i - 1, new JavaScriptToken(Token.NAME, tv));
+ }
+ }
+ }
+ }
+
+ private ErrorReporter logger;
+
+ private boolean munge;
+ private boolean verbose;
+
+ private static final int BUILDING_SYMBOL_TREE = 1;
+ private static final int CHECKING_SYMBOL_TREE = 2;
+
+ private int mode;
+ private int offset;
+ private int braceNesting;
+ private ArrayList tokens;
+ private Stack scopes = new Stack();
+ private ScriptOrFnScope globalScope = new ScriptOrFnScope(-1, null);
+ private Hashtable indexedScopes = new Hashtable();
+
+ public JavaScriptCompressor(Reader in, ErrorReporter reporter)
+ throws IOException, EvaluatorException {
+
+ this.logger = reporter;
+ this.tokens = parse(in, reporter);
+ }
+
+ public void compress(Writer out, int linebreak, boolean munge, boolean verbose,
+ boolean preserveAllSemiColons, boolean disableOptimizations)
+ throws IOException {
+
+ this.munge = munge;
+ this.verbose = verbose;
+
+ processStringLiterals(this.tokens, !disableOptimizations);
+
+ if (!disableOptimizations) {
+ optimizeObjectMemberAccess(this.tokens);
+ optimizeObjLitMemberDecl(this.tokens);
+ }
+
+ buildSymbolTree();
+ // DO NOT TOUCH this.tokens BETWEEN THESE TWO PHASES (BECAUSE OF this.indexedScopes)
+ mungeSymboltree();
+ StringBuffer sb = printSymbolTree(linebreak, preserveAllSemiColons);
+
+ out.write(sb.toString());
+ }
+
+ private ScriptOrFnScope getCurrentScope() {
+ return (ScriptOrFnScope) scopes.peek();
+ }
+
+ private void enterScope(ScriptOrFnScope scope) {
+ scopes.push(scope);
+ }
+
+ private void leaveCurrentScope() {
+ scopes.pop();
+ }
+
+ private JavaScriptToken consumeToken() {
+ return (JavaScriptToken) tokens.get(offset++);
+ }
+
+ private JavaScriptToken getToken(int delta) {
+ return (JavaScriptToken) tokens.get(offset + delta);
+ }
+
+ /*
+ * Returns the identifier for the specified symbol defined in
+ * the specified scope or in any scope above it. Returns null
+ * if this symbol does not have a corresponding identifier.
+ */
+ private JavaScriptIdentifier getIdentifier(String symbol, ScriptOrFnScope scope) {
+ JavaScriptIdentifier identifier;
+ while (scope != null) {
+ identifier = scope.getIdentifier(symbol);
+ if (identifier != null) {
+ return identifier;
+ }
+ scope = scope.getParentScope();
+ }
+ return null;
+ }
+
+ /*
+ * If either 'eval' or 'with' is used in a local scope, we must make
+ * sure that all containing local scopes don't get munged. Otherwise,
+ * the obfuscation would potentially introduce bugs.
+ */
+ private void protectScopeFromObfuscation(ScriptOrFnScope scope) {
+ assert scope != null;
+
+ if (scope == globalScope) {
+ // The global scope does not get obfuscated,
+ // so we don't need to worry about it...
+ return;
+ }
+
+ // Find the highest local scope containing the specified scope.
+ while (scope.getParentScope() != globalScope) {
+ scope = scope.getParentScope();
+ }
+
+ assert scope.getParentScope() == globalScope;
+ scope.preventMunging();
+ }
+
+ private String getDebugString(int max) {
+ assert max > 0;
+ StringBuffer result = new StringBuffer();
+ int start = Math.max(offset - max, 0);
+ int end = Math.min(offset + max, tokens.size());
+ for (int i = start; i < end; i++) {
+ JavaScriptToken token = (JavaScriptToken) tokens.get(i);
+ if (i == offset - 1) {
+ result.append(" ---> ");
+ }
+ result.append(token.getValue());
+ if (i == offset - 1) {
+ result.append(" <--- ");
+ }
+ }
+ return result.toString();
+ }
+
+ private void warn(String message, boolean showDebugString) {
+ if (verbose) {
+ if (showDebugString) {
+ message = message + "\n" + getDebugString(10);
+ }
+ logger.warning(message, null, -1, null, -1);
+ }
+ }
+
+ private void parseFunctionDeclaration() {
+
+ String symbol;
+ JavaScriptToken token;
+ ScriptOrFnScope currentScope, fnScope;
+ JavaScriptIdentifier identifier;
+
+ currentScope = getCurrentScope();
+
+ token = consumeToken();
+ if (token.getType() == Token.NAME) {
+ if (mode == BUILDING_SYMBOL_TREE) {
+ // Get the name of the function and declare it in the current scope.
+ symbol = token.getValue();
+ if (currentScope.getIdentifier(symbol) != null) {
+ warn("The function " + symbol + " has already been declared in the same scope...", true);
+ }
+ currentScope.declareIdentifier(symbol);
+ }
+ token = consumeToken();
+ }
+
+ assert token.getType() == Token.LP;
+ if (mode == BUILDING_SYMBOL_TREE) {
+ fnScope = new ScriptOrFnScope(braceNesting, currentScope);
+ indexedScopes.put(new Integer(offset), fnScope);
+ } else {
+ fnScope = (ScriptOrFnScope) indexedScopes.get(new Integer(offset));
+ }
+
+ // Parse function arguments.
+ int argpos = 0;
+ while ((token = consumeToken()).getType() != Token.RP) {
+ assert token.getType() == Token.NAME ||
+ token.getType() == Token.COMMA;
+ if (token.getType() == Token.NAME && mode == BUILDING_SYMBOL_TREE) {
+ symbol = token.getValue();
+ identifier = fnScope.declareIdentifier(symbol);
+ if (symbol.equals("$super") && argpos == 0) {
+ // Exception for Prototype 1.6...
+ identifier.preventMunging();
+ }
+ argpos++;
+ }
+ }
+
+ token = consumeToken();
+ assert token.getType() == Token.LC;
+ braceNesting++;
+
+ token = getToken(0);
+ if (token.getType() == Token.STRING &&
+ getToken(1).getType() == Token.SEMI) {
+ // This is a hint. Hints are empty statements that look like
+ // "localvar1:nomunge, localvar2:nomunge"; They allow developers
+ // to prevent specific symbols from getting obfuscated (some heretic
+ // implementations, such as Prototype 1.6, require specific variable
+ // names, such as $super for example, in order to work appropriately.
+ // Note: right now, only "nomunge" is supported in the right hand side
+ // of a hint. However, in the future, the right hand side may contain
+ // other values.
+ consumeToken();
+ String hints = token.getValue();
+ // Remove the leading and trailing quotes...
+ hints = hints.substring(1, hints.length() - 1).trim();
+ StringTokenizer st1 = new StringTokenizer(hints, ",");
+ while (st1.hasMoreTokens()) {
+ String hint = st1.nextToken();
+ int idx = hint.indexOf(':');
+ if (idx <= 0 || idx >= hint.length() - 1) {
+ if (mode == BUILDING_SYMBOL_TREE) {
+ // No need to report the error twice, hence the test...
+ warn("Invalid hint syntax: " + hint, true);
+ }
+ break;
+ }
+ String variableName = hint.substring(0, idx).trim();
+ String variableType = hint.substring(idx + 1).trim();
+ if (mode == BUILDING_SYMBOL_TREE) {
+ fnScope.addHint(variableName, variableType);
+ } else if (mode == CHECKING_SYMBOL_TREE) {
+ identifier = fnScope.getIdentifier(variableName);
+ if (identifier != null) {
+ if (variableType.equals("nomunge")) {
+ identifier.preventMunging();
+ } else {
+ warn("Unsupported hint value: " + hint, true);
+ }
+ } else {
+ warn("Hint refers to an unknown identifier: " + hint, true);
+ }
+ }
+ }
+ }
+
+ parseScope(fnScope);
+ }
+
+ private void parseCatch() {
+
+ String symbol;
+ JavaScriptToken token;
+ ScriptOrFnScope currentScope;
+ JavaScriptIdentifier identifier;
+
+ token = getToken(-1);
+ assert token.getType() == Token.CATCH;
+ token = consumeToken();
+ assert token.getType() == Token.LP;
+ token = consumeToken();
+ assert token.getType() == Token.NAME;
+
+ symbol = token.getValue();
+ currentScope = getCurrentScope();
+
+ if (mode == BUILDING_SYMBOL_TREE) {
+ // We must declare the exception identifier in the containing function
+ // scope to avoid errors related to the obfuscation process. No need to
+ // display a warning if the symbol was already declared here...
+ currentScope.declareIdentifier(symbol);
+ } else {
+ identifier = getIdentifier(symbol, currentScope);
+ identifier.incrementRefcount();
+ }
+
+ token = consumeToken();
+ assert token.getType() == Token.RP;
+ }
+
+ private void parseExpression() {
+
+ // Parse the expression until we encounter a comma or a semi-colon
+ // in the same brace nesting, bracket nesting and paren nesting.
+ // Parse functions if any...
+
+ String symbol;
+ JavaScriptToken token;
+ ScriptOrFnScope currentScope;
+ JavaScriptIdentifier identifier;
+
+ int expressionBraceNesting = braceNesting;
+ int bracketNesting = 0;
+ int parensNesting = 0;
+
+ int length = tokens.size();
+
+ while (offset < length) {
+
+ token = consumeToken();
+ currentScope = getCurrentScope();
+
+ switch (token.getType()) {
+
+ case Token.SEMI:
+ case Token.COMMA:
+ if (braceNesting == expressionBraceNesting &&
+ bracketNesting == 0 &&
+ parensNesting == 0) {
+ return;
+ }
+ break;
+
+ case Token.FUNCTION:
+ parseFunctionDeclaration();
+ break;
+
+ case Token.LC:
+ braceNesting++;
+ break;
+
+ case Token.RC:
+ braceNesting--;
+ assert braceNesting >= expressionBraceNesting;
+ break;
+
+ case Token.LB:
+ bracketNesting++;
+ break;
+
+ case Token.RB:
+ bracketNesting--;
+ break;
+
+ case Token.LP:
+ parensNesting++;
+ break;
+
+ case Token.RP:
+ parensNesting--;
+ break;
+
+ case Token.SPECIALCOMMENT:
+ if (mode == BUILDING_SYMBOL_TREE) {
+ protectScopeFromObfuscation(currentScope);
+ warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression!" : ""), true);
+ }
+ break;
+
+ case Token.NAME:
+ symbol = token.getValue();
+
+ if (mode == BUILDING_SYMBOL_TREE) {
+
+ if (symbol.equals("eval")) {
+
+ protectScopeFromObfuscation(currentScope);
+ warn("Using 'eval' is not recommended." + (munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
+
+ }
+
+ } else if (mode == CHECKING_SYMBOL_TREE) {
+
+ if ((offset < 2 ||
+ (getToken(-2).getType() != Token.DOT &&
+ getToken(-2).getType() != Token.GET &&
+ getToken(-2).getType() != Token.SET)) &&
+ getToken(0).getType() != Token.OBJECTLIT) {
+
+ identifier = getIdentifier(symbol, currentScope);
+
+ if (identifier == null) {
+
+ if (symbol.length() <= 3 && !builtin.contains(symbol)) {
+ // Here, we found an undeclared and un-namespaced symbol that is
+ // 3 characters or less in length. Declare it in the global scope.
+ // We don't need to declare longer symbols since they won't cause
+ // any conflict with other munged symbols.
+ globalScope.declareIdentifier(symbol);
+ warn("Found an undeclared symbol: " + symbol, true);
+ }
+
+ } else {
+
+ identifier.incrementRefcount();
+ }
+ }
+ }
+ break;
+ }
+ }
+ }
+
+ private void parseScope(ScriptOrFnScope scope) {
+
+ String symbol;
+ JavaScriptToken token;
+ JavaScriptIdentifier identifier;
+
+ int length = tokens.size();
+
+ enterScope(scope);
+
+ while (offset < length) {
+
+ token = consumeToken();
+
+ switch (token.getType()) {
+
+ case Token.VAR:
+
+ if (mode == BUILDING_SYMBOL_TREE && scope.incrementVarCount() > 1) {
+ warn("Try to use a single 'var' statement per scope.", true);
+ }
+
+ /* FALLSTHROUGH */
+
+ case Token.CONST:
+
+ // The var keyword is followed by at least one symbol name.
+ // If several symbols follow, they are comma separated.
+ for (; ;) {
+ token = consumeToken();
+
+ assert token.getType() == Token.NAME;
+
+ if (mode == BUILDING_SYMBOL_TREE) {
+ symbol = token.getValue();
+ if (scope.getIdentifier(symbol) == null) {
+ scope.declareIdentifier(symbol);
+ } else {
+ warn("The variable " + symbol + " has already been declared in the same scope...", true);
+ }
+ }
+
+ token = getToken(0);
+
+ assert token.getType() == Token.SEMI ||
+ token.getType() == Token.ASSIGN ||
+ token.getType() == Token.COMMA ||
+ token.getType() == Token.IN;
+
+ if (token.getType() == Token.IN) {
+ break;
+ } else {
+ parseExpression();
+ token = getToken(-1);
+ if (token.getType() == Token.SEMI) {
+ break;
+ }
+ }
+ }
+ break;
+
+ case Token.FUNCTION:
+ parseFunctionDeclaration();
+ break;
+
+ case Token.LC:
+ braceNesting++;
+ break;
+
+ case Token.RC:
+ braceNesting--;
+ assert braceNesting >= scope.getBraceNesting();
+ if (braceNesting == scope.getBraceNesting()) {
+ leaveCurrentScope();
+ return;
+ }
+ break;
+
+ case Token.WITH:
+ if (mode == BUILDING_SYMBOL_TREE) {
+ // Inside a 'with' block, it is impossible to figure out
+ // statically whether a symbol is a local variable or an
+ // object member. As a consequence, the only thing we can
+ // do is turn the obfuscation off for the highest scope
+ // containing the 'with' block.
+ protectScopeFromObfuscation(scope);
+ warn("Using 'with' is not recommended." + (munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
+ }
+ break;
+
+ case Token.CATCH:
+ parseCatch();
+ break;
+
+ case Token.SPECIALCOMMENT:
+ if (mode == BUILDING_SYMBOL_TREE) {
+ protectScopeFromObfuscation(scope);
+ warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
+ }
+ break;
+
+ case Token.NAME:
+ symbol = token.getValue();
+
+ if (mode == BUILDING_SYMBOL_TREE) {
+
+ if (symbol.equals("eval")) {
+
+ protectScopeFromObfuscation(scope);
+ warn("Using 'eval' is not recommended." + (munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
+
+ }
+
+ } else if (mode == CHECKING_SYMBOL_TREE) {
+
+ if ((offset < 2 || getToken(-2).getType() != Token.DOT) &&
+ getToken(0).getType() != Token.OBJECTLIT) {
+
+ identifier = getIdentifier(symbol, scope);
+
+ if (identifier == null) {
+
+ if (symbol.length() <= 3 && !builtin.contains(symbol)) {
+ // Here, we found an undeclared and un-namespaced symbol that is
+ // 3 characters or less in length. Declare it in the global scope.
+ // We don't need to declare longer symbols since they won't cause
+ // any conflict with other munged symbols.
+ globalScope.declareIdentifier(symbol);
+ warn("Found an undeclared symbol: " + symbol, true);
+ }
+
+ } else {
+
+ identifier.incrementRefcount();
+ }
+ }
+ }
+ break;
+ }
+ }
+ }
+
+ private void buildSymbolTree() {
+ offset = 0;
+ braceNesting = 0;
+ scopes.clear();
+ indexedScopes.clear();
+ indexedScopes.put(new Integer(0), globalScope);
+ mode = BUILDING_SYMBOL_TREE;
+ parseScope(globalScope);
+ }
+
+ private void mungeSymboltree() {
+
+ if (!munge) {
+ return;
+ }
+
+ // One problem with obfuscation resides in the use of undeclared
+ // and un-namespaced global symbols that are 3 characters or less
+ // in length. Here is an example:
+ //
+ // var declaredGlobalVar;
+ //
+ // function declaredGlobalFn() {
+ // var localvar;
+ // localvar = abc; // abc is an undeclared global symbol
+ // }
+ //
+ // In the example above, there is a slim chance that localvar may be
+ // munged to 'abc', conflicting with the undeclared global symbol
+ // abc, creating a potential bug. The following code detects such
+ // global symbols. This must be done AFTER the entire file has been
+ // parsed, and BEFORE munging the symbol tree. Note that declaring
+ // extra symbols in the global scope won't hurt.
+ //
+ // Note: Since we go through all the tokens to do this, we also use
+ // the opportunity to count how many times each identifier is used.
+
+ offset = 0;
+ braceNesting = 0;
+ scopes.clear();
+ mode = CHECKING_SYMBOL_TREE;
+ parseScope(globalScope);
+ globalScope.munge();
+ }
+
+ private StringBuffer printSymbolTree(int linebreakpos, boolean preserveAllSemiColons)
+ throws IOException {
+
+ offset = 0;
+ braceNesting = 0;
+ scopes.clear();
+
+ String symbol;
+ JavaScriptToken token;
+ ScriptOrFnScope currentScope;
+ JavaScriptIdentifier identifier;
+
+ int length = tokens.size();
+ StringBuffer result = new StringBuffer();
+
+ int linestartpos = 0;
+
+ enterScope(globalScope);
+
+ while (offset < length) {
+
+ token = consumeToken();
+ symbol = token.getValue();
+ currentScope = getCurrentScope();
+
+ switch (token.getType()) {
+
+ case Token.NAME:
+
+ if (offset >= 2 && getToken(-2).getType() == Token.DOT ||
+ getToken(0).getType() == Token.OBJECTLIT) {
+
+ result.append(symbol);
+
+ } else {
+
+ identifier = getIdentifier(symbol, currentScope);
+ if (identifier != null) {
+ if (identifier.getMungedValue() != null) {
+ result.append(identifier.getMungedValue());
+ } else {
+ result.append(symbol);
+ }
+ if (currentScope != globalScope && identifier.getRefcount() == 0) {
+ warn("The symbol " + symbol + " is declared but is apparently never used.\nThis code can probably be written in a more compact way.", true);
+ }
+ } else {
+ result.append(symbol);
+ }
+ }
+ break;
+
+ case Token.REGEXP:
+ case Token.NUMBER:
+ case Token.STRING:
+ result.append(symbol);
+ break;
+
+ case Token.ADD:
+ case Token.SUB:
+ result.append((String) literals.get(new Integer(token.getType())));
+ if (offset < length) {
+ token = getToken(0);
+ if (token.getType() == Token.INC ||
+ token.getType() == Token.DEC ||
+ token.getType() == Token.ADD ||
+ token.getType() == Token.DEC) {
+ // Handle the case x +/- ++/-- y
+ // We must keep a white space here. Otherwise, x +++ y would be
+ // interpreted as x ++ + y by the compiler, which is a bug (due
+ // to the implicit assignment being done on the wrong variable)
+ result.append(' ');
+ } else if (token.getType() == Token.POS && getToken(-1).getType() == Token.ADD ||
+ token.getType() == Token.NEG && getToken(-1).getType() == Token.SUB) {
+ // Handle the case x + + y and x - - y
+ result.append(' ');
+ }
+ }
+ break;
+
+ case Token.FUNCTION:
+ result.append("function");
+ token = consumeToken();
+ if (token.getType() == Token.NAME) {
+ result.append(' ');
+ symbol = token.getValue();
+ identifier = getIdentifier(symbol, currentScope);
+ assert identifier != null;
+ if (identifier.getMungedValue() != null) {
+ result.append(identifier.getMungedValue());
+ } else {
+ result.append(symbol);
+ }
+ if (currentScope != globalScope && identifier.getRefcount() == 0) {
+ warn("The symbol " + symbol + " is declared but is apparently never used.\nThis code can probably be written in a more compact way.", true);
+ }
+ token = consumeToken();
+ }
+ assert token.getType() == Token.LP;
+ result.append('(');
+ currentScope = (ScriptOrFnScope) indexedScopes.get(new Integer(offset));
+ enterScope(currentScope);
+ while ((token = consumeToken()).getType() != Token.RP) {
+ assert token.getType() == Token.NAME || token.getType() == Token.COMMA;
+ if (token.getType() == Token.NAME) {
+ symbol = token.getValue();
+ identifier = getIdentifier(symbol, currentScope);
+ assert identifier != null;
+ if (identifier.getMungedValue() != null) {
+ result.append(identifier.getMungedValue());
+ } else {
+ result.append(symbol);
+ }
+ } else if (token.getType() == Token.COMMA) {
+ result.append(',');
+ }
+ }
+ result.append(')');
+ token = consumeToken();
+ assert token.getType() == Token.LC;
+ result.append('{');
+ braceNesting++;
+ token = getToken(0);
+ if (token.getType() == Token.STRING &&
+ getToken(1).getType() == Token.SEMI) {
+ // This is a hint. Skip it!
+ consumeToken();
+ consumeToken();
+ }
+ break;
+
+ case Token.RETURN:
+ case Token.TYPEOF:
+ result.append(literals.get(new Integer(token.getType())));
+ // No space needed after 'return' and 'typeof' when followed
+ // by '(', '[', '{', a string or a regexp.
+ if (offset < length) {
+ token = getToken(0);
+ if (token.getType() != Token.LP &&
+ token.getType() != Token.LB &&
+ token.getType() != Token.LC &&
+ token.getType() != Token.STRING &&
+ token.getType() != Token.REGEXP &&
+ token.getType() != Token.SEMI) {
+ result.append(' ');
+ }
+ }
+ break;
+
+ case Token.CASE:
+ case Token.THROW:
+ result.append(literals.get(new Integer(token.getType())));
+ // White-space needed after 'case' and 'throw' when not followed by a string.
+ if (offset < length && getToken(0).getType() != Token.STRING) {
+ result.append(' ');
+ }
+ break;
+
+ case Token.BREAK:
+ case Token.CONTINUE:
+ result.append(literals.get(new Integer(token.getType())));
+ if (offset < length && getToken(0).getType() != Token.SEMI) {
+ // If 'break' or 'continue' is not followed by a semi-colon, it must
+ // be followed by a label, hence the need for a white space.
+ result.append(' ');
+ }
+ break;
+
+ case Token.LC:
+ result.append('{');
+ braceNesting++;
+ break;
+
+ case Token.RC:
+ result.append('}');
+ braceNesting--;
+ assert braceNesting >= currentScope.getBraceNesting();
+ if (braceNesting == currentScope.getBraceNesting()) {
+ leaveCurrentScope();
+ }
+ break;
+
+ case Token.SEMI:
+ // No need to output a semi-colon if the next character is a right-curly...
+ if (preserveAllSemiColons || offset < length && getToken(0).getType() != Token.RC) {
+ result.append(';');
+ }
+
+ if (linebreakpos >= 0 && result.length() - linestartpos > linebreakpos) {
+ // Some source control tools don't like it when files containing lines longer
+ // than, say 8000 characters, are checked in. The linebreak option is used in
+ // that case to split long lines after a specific column.
+ result.append('\n');
+ linestartpos = result.length();
+ }
+ break;
+
+ case Token.SPECIALCOMMENT:
+ if (result.length() > 0 && result.charAt(result.length() - 1) != '\n') {
+ result.append("\n");
+ }
+ result.append("/*");
+ result.append(symbol);
+ result.append("*/\n");
+ break;
+
+ default:
+ String literal = (String) literals.get(new Integer(token.getType()));
+ if (literal != null) {
+ result.append(literal);
+ } else {
+ warn("This symbol cannot be printed: " + symbol, true);
+ }
+ break;
+ }
+ }
+
+ // Append a semi-colon at the end, even if unnecessary semi-colons are
+ // supposed to be removed. This is especially useful when concatenating
+ // several minified files (the absence of an ending semi-colon at the
+ // end of one file may very likely cause a syntax error)
+ if (!preserveAllSemiColons && result.length() > 0) {
+ if (result.charAt(result.length() - 1) == '\n') {
+ result.setCharAt(result.length() - 1, ';');
+ } else {
+ result.append(';');
+ }
+ }
+
+ return result;
+ }
+}
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptIdentifier.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptIdentifier.java
new file mode 100644
index 0000000..8668f49
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptIdentifier.java
@@ -0,0 +1,55 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import yuicompressor.org.mozilla.javascript.Token;
+
+/**
+ * JavaScriptIdentifier represents a variable/function identifier.
+ */
+class JavaScriptIdentifier extends JavaScriptToken {
+
+ private int refcount = 0;
+ private String mungedValue;
+ private ScriptOrFnScope declaredScope;
+ private boolean markedForMunging = true;
+
+ JavaScriptIdentifier(String value, ScriptOrFnScope declaredScope) {
+ super(Token.NAME, value);
+ this.declaredScope = declaredScope;
+ }
+
+ ScriptOrFnScope getDeclaredScope() {
+ return declaredScope;
+ }
+
+ void setMungedValue(String value) {
+ mungedValue = value;
+ }
+
+ String getMungedValue() {
+ return mungedValue;
+ }
+
+ void preventMunging() {
+ markedForMunging = false;
+ }
+
+ boolean isMarkedForMunging() {
+ return markedForMunging;
+ }
+
+ void incrementRefcount() {
+ refcount++;
+ }
+
+ int getRefcount() {
+ return refcount;
+ }
+}
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptToken.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptToken.java
new file mode 100644
index 0000000..fee21d9
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JavaScriptToken.java
@@ -0,0 +1,28 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+public class JavaScriptToken {
+
+ private int type;
+ private String value;
+
+ JavaScriptToken(int type, String value) {
+ this.type = type;
+ this.value = value;
+ }
+
+ int getType() {
+ return type;
+ }
+
+ String getValue() {
+ return value;
+ }
+}
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/ScriptOrFnScope.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/ScriptOrFnScope.java
new file mode 100644
index 0000000..c1a2e47
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/ScriptOrFnScope.java
@@ -0,0 +1,169 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.Hashtable;
+
+class ScriptOrFnScope {
+
+ private int braceNesting;
+ private ScriptOrFnScope parentScope;
+ private ArrayList subScopes;
+ private Hashtable identifiers = new Hashtable();
+ private Hashtable hints = new Hashtable();
+ private boolean markedForMunging = true;
+ private int varcount = 0;
+
+ ScriptOrFnScope(int braceNesting, ScriptOrFnScope parentScope) {
+ this.braceNesting = braceNesting;
+ this.parentScope = parentScope;
+ this.subScopes = new ArrayList();
+ if (parentScope != null) {
+ parentScope.subScopes.add(this);
+ }
+ }
+
+ int getBraceNesting() {
+ return braceNesting;
+ }
+
+ ScriptOrFnScope getParentScope() {
+ return parentScope;
+ }
+
+ JavaScriptIdentifier declareIdentifier(String symbol) {
+ JavaScriptIdentifier identifier = (JavaScriptIdentifier) identifiers.get(symbol);
+ if (identifier == null) {
+ identifier = new JavaScriptIdentifier(symbol, this);
+ identifiers.put(symbol, identifier);
+ }
+ return identifier;
+ }
+
+ JavaScriptIdentifier getIdentifier(String symbol) {
+ return (JavaScriptIdentifier) identifiers.get(symbol);
+ }
+
+ void addHint(String variableName, String variableType) {
+ hints.put(variableName, variableType);
+ }
+
+ void preventMunging() {
+ if (parentScope != null) {
+ // The symbols in the global scope don't get munged,
+ // but the sub-scopes it contains do get munged.
+ markedForMunging = false;
+ }
+ }
+
+ private ArrayList getUsedSymbols() {
+ ArrayList result = new ArrayList();
+ Enumeration elements = identifiers.elements();
+ while (elements.hasMoreElements()) {
+ JavaScriptIdentifier identifier = (JavaScriptIdentifier) elements.nextElement();
+ String mungedValue = identifier.getMungedValue();
+ if (mungedValue == null) {
+ mungedValue = identifier.getValue();
+ }
+ result.add(mungedValue);
+ }
+ return result;
+ }
+
+ private ArrayList getAllUsedSymbols() {
+ ArrayList result = new ArrayList();
+ ScriptOrFnScope scope = this;
+ while (scope != null) {
+ result.addAll(scope.getUsedSymbols());
+ scope = scope.parentScope;
+ }
+ return result;
+ }
+
+ int incrementVarCount() {
+ varcount++;
+ return varcount;
+ }
+
+ void munge() {
+
+ if (!markedForMunging) {
+ // Stop right here if this scope was flagged as unsafe for munging.
+ return;
+ }
+
+ int pickFromSet = 1;
+
+ // Do not munge symbols in the global scope!
+ if (parentScope != null) {
+
+ ArrayList freeSymbols = new ArrayList();
+
+ freeSymbols.addAll(JavaScriptCompressor.ones);
+ freeSymbols.removeAll(getAllUsedSymbols());
+ if (freeSymbols.size() == 0) {
+ pickFromSet = 2;
+ freeSymbols.addAll(JavaScriptCompressor.twos);
+ freeSymbols.removeAll(getAllUsedSymbols());
+ }
+ if (freeSymbols.size() == 0) {
+ pickFromSet = 3;
+ freeSymbols.addAll(JavaScriptCompressor.threes);
+ freeSymbols.removeAll(getAllUsedSymbols());
+ }
+ if (freeSymbols.size() == 0) {
+ throw new IllegalStateException("The YUI Compressor ran out of symbols. Aborting...");
+ }
+
+ // APPJET: sort identifiers by popularity
+ JavaScriptIdentifier idArray[] = ((Hashtable<String,JavaScriptIdentifier>)identifiers).values().toArray(new JavaScriptIdentifier[0]);
+ java.util.Arrays.sort(idArray, new java.util.Comparator<JavaScriptIdentifier>() {
+ public int compare(JavaScriptIdentifier i1, JavaScriptIdentifier i2) {
+ return i2.getRefcount() - i1.getRefcount(); // positive if i2 is more popular, indicating i2 should come first
+ }
+ });
+ java.util.Iterator<JavaScriptIdentifier> elements = java.util.Arrays.asList(idArray).iterator();
+
+ //Enumeration elements = identifiers.elements();
+ while (elements.hasNext()) {
+ if (freeSymbols.size() == 0) {
+ pickFromSet++;
+ if (pickFromSet == 2) {
+ freeSymbols.addAll(JavaScriptCompressor.twos);
+ } else if (pickFromSet == 3) {
+ freeSymbols.addAll(JavaScriptCompressor.threes);
+ } else {
+ throw new IllegalStateException("The YUI Compressor ran out of symbols. Aborting...");
+ }
+ // It is essential to remove the symbols already used in
+ // the containing scopes, or some of the variables declared
+ // in the containing scopes will be redeclared, which can
+ // lead to errors.
+ freeSymbols.removeAll(getAllUsedSymbols());
+ }
+
+ String mungedValue;
+ JavaScriptIdentifier identifier = (JavaScriptIdentifier) elements.next();
+ if (identifier.isMarkedForMunging()) {
+ mungedValue = (String) freeSymbols.remove(0);
+ } else {
+ mungedValue = identifier.getValue();
+ }
+ identifier.setMungedValue(mungedValue);
+ }
+ }
+
+ for (int i = 0; i < subScopes.size(); i++) {
+ ScriptOrFnScope scope = (ScriptOrFnScope) subScopes.get(i);
+ scope.munge();
+ }
+ }
+}
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/YUICompressor.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/YUICompressor.java
new file mode 100644
index 0000000..dcbaff4
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/YUICompressor.java
@@ -0,0 +1,232 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import jargs.gnu.CmdLineParser;
+import yuicompressor.org.mozilla.javascript.ErrorReporter;
+import yuicompressor.org.mozilla.javascript.EvaluatorException;
+
+import java.io.*;
+import java.nio.charset.Charset;
+
+public class YUICompressor {
+
+ public static void main(String args[]) {
+
+ CmdLineParser parser = new CmdLineParser();
+ CmdLineParser.Option typeOpt = parser.addStringOption("type");
+ CmdLineParser.Option verboseOpt = parser.addBooleanOption('v', "verbose");
+ CmdLineParser.Option nomungeOpt = parser.addBooleanOption("nomunge");
+ CmdLineParser.Option linebreakOpt = parser.addStringOption("line-break");
+ CmdLineParser.Option preserveSemiOpt = parser.addBooleanOption("preserve-semi");
+ CmdLineParser.Option disableOptimizationsOpt = parser.addBooleanOption("disable-optimizations");
+ CmdLineParser.Option helpOpt = parser.addBooleanOption('h', "help");
+ CmdLineParser.Option charsetOpt = parser.addStringOption("charset");
+ CmdLineParser.Option outputFilenameOpt = parser.addStringOption('o', "output");
+
+ Reader in = null;
+ Writer out = null;
+
+ try {
+
+ parser.parse(args);
+
+ Boolean help = (Boolean) parser.getOptionValue(helpOpt);
+ if (help != null && help.booleanValue()) {
+ usage();
+ System.exit(0);
+ }
+
+ boolean verbose = parser.getOptionValue(verboseOpt) != null;
+
+ String charset = (String) parser.getOptionValue(charsetOpt);
+ if (charset == null || !Charset.isSupported(charset)) {
+ charset = System.getProperty("file.encoding");
+ if (charset == null) {
+ charset = "UTF-8";
+ }
+ if (verbose) {
+ System.err.println("\n[INFO] Using charset " + charset);
+ }
+ }
+
+ String[] fileArgs = parser.getRemainingArgs();
+ String type = (String) parser.getOptionValue(typeOpt);
+
+ if (fileArgs.length == 0) {
+
+ if (type == null || !type.equalsIgnoreCase("js") && !type.equalsIgnoreCase("css")) {
+ usage();
+ System.exit(1);
+ }
+
+ in = new InputStreamReader(System.in, charset);
+
+ } else {
+
+ if (type != null && !type.equalsIgnoreCase("js") && !type.equalsIgnoreCase("css")) {
+ usage();
+ System.exit(1);
+ }
+
+ String inputFilename = fileArgs[0];
+
+ if (type == null) {
+ int idx = inputFilename.lastIndexOf('.');
+ if (idx >= 0 && idx < inputFilename.length() - 1) {
+ type = inputFilename.substring(idx + 1);
+ }
+ }
+
+ if (type == null || !type.equalsIgnoreCase("js") && !type.equalsIgnoreCase("css")) {
+ usage();
+ System.exit(1);
+ }
+
+ in = new InputStreamReader(new FileInputStream(inputFilename), charset);
+ }
+
+ int linebreakpos = -1;
+ String linebreakstr = (String) parser.getOptionValue(linebreakOpt);
+ if (linebreakstr != null) {
+ try {
+ linebreakpos = Integer.parseInt(linebreakstr, 10);
+ } catch (NumberFormatException e) {
+ usage();
+ System.exit(1);
+ }
+ }
+
+ String outputFilename = (String) parser.getOptionValue(outputFilenameOpt);
+
+ if (type.equalsIgnoreCase("js")) {
+
+ try {
+
+ JavaScriptCompressor compressor = new JavaScriptCompressor(in, new ErrorReporter() {
+
+ public void warning(String message, String sourceName,
+ int line, String lineSource, int lineOffset) {
+ if (line < 0) {
+ System.err.println("\n[WARNING] " + message);
+ } else {
+ System.err.println("\n[WARNING] " + line + ':' + lineOffset + ':' + message);
+ }
+ }
+
+ public void error(String message, String sourceName,
+ int line, String lineSource, int lineOffset) {
+ if (line < 0) {
+ System.err.println("\n[ERROR] " + message);
+ } else {
+ System.err.println("\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);
+ }
+ });
+
+ // Close the input stream first, and then open the output stream,
+ // in case the output file should override the input file.
+ in.close(); in = null;
+
+ if (outputFilename == null) {
+ out = new OutputStreamWriter(System.out, charset);
+ } else {
+ out = new OutputStreamWriter(new FileOutputStream(outputFilename), charset);
+ }
+
+ boolean munge = parser.getOptionValue(nomungeOpt) == null;
+ boolean preserveAllSemiColons = parser.getOptionValue(preserveSemiOpt) != null;
+ boolean disableOptimizations = parser.getOptionValue(disableOptimizationsOpt) != null;
+
+ compressor.compress(out, linebreakpos, munge, verbose,
+ preserveAllSemiColons, disableOptimizations);
+
+ } catch (EvaluatorException e) {
+
+ e.printStackTrace();
+ // Return a special error code used specifically by the web front-end.
+ System.exit(2);
+
+ }
+
+ } else if (type.equalsIgnoreCase("css")) {
+
+ CssCompressor compressor = new CssCompressor(in);
+
+ // Close the input stream first, and then open the output stream,
+ // in case the output file should override the input file.
+ in.close(); in = null;
+
+ if (outputFilename == null) {
+ out = new OutputStreamWriter(System.out, charset);
+ } else {
+ out = new OutputStreamWriter(new FileOutputStream(outputFilename), charset);
+ }
+
+ compressor.compress(out, linebreakpos);
+ }
+
+ } catch (CmdLineParser.OptionException e) {
+
+ usage();
+ System.exit(1);
+
+ } catch (IOException e) {
+
+ e.printStackTrace();
+ System.exit(1);
+
+ } finally {
+
+ if (in != null) {
+ try {
+ in.close();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+
+ if (out != null) {
+ try {
+ out.close();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+ }
+
+ private static void usage() {
+ System.out.println(
+ "\nUsage: java -jar yuicompressor-x.y.z.jar [options] [input file]\n\n"
+
+ + "Global Options\n"
+ + " -h, --help Displays this information\n"
+ + " --type <js|css> Specifies the type of the input file\n"
+ + " --charset <charset> Read the input file using <charset>\n"
+ + " --line-break <column> Insert a line break after the specified column number\n"
+ + " -v, --verbose Display informational messages and warnings\n"
+ + " -o <file> Place the output into <file>. Defaults to stdout.\n\n"
+
+ + "JavaScript Options\n"
+ + " --nomunge Minify only, do not obfuscate\n"
+ + " --preserve-semi Preserve all semicolons\n"
+ + " --disable-optimizations Disable all micro optimizations\n\n"
+
+ + "If no input file is specified, it defaults to stdin. In this case, the 'type'\n"
+ + "option is required. Otherwise, the 'type' option is required only if the input\n"
+ + "file extension is neither 'js' nor 'css'.");
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 18:53:14 +0000