Use Uglify.js for JS optimization

Uglify.js library was included in ui/util folder. A wrapper script
util/uglifyjs/uglify was created to run Uglify.js in Rhino enviroment.

https://fedorahosted.org/freeipa/ticket/112

install/ui/util/uglifyjs/lib/squeeze-more.js

@@ -0,0 +1,78 @@
+var jsp = require("./parse-js"),
+    pro = require("./process"),
+    slice = jsp.slice,
+    member = jsp.member,
+    curry = jsp.curry,
+    MAP = pro.MAP,
+    PRECEDENCE = jsp.PRECEDENCE,
+    OPERATORS = jsp.OPERATORS;
+
+function ast_squeeze_more(ast) {
+    var w = pro.ast_walker(), walk = w.walk, scope;
+    function with_scope(s, cont) {
+        var save = scope, ret;
+        scope = s;
+        ret = cont();
+        scope = save;
+        return ret;
+    };
+    function _lambda(name, args, body) {
+        return [ this[0], name, args, with_scope(body.scope, curry(MAP, body, walk)) ];
+    };
+    return w.with_walkers({
+        "toplevel": function(body) {
+            return [ this[0], with_scope(this.scope, curry(MAP, body, walk)) ];
+        },
+        "function": _lambda,
+        "defun": _lambda,
+        "new": function(ctor, args) {
+            if (ctor[0] == "name") {
+                if (ctor[1] == "Array" && !scope.has("Array")) {
+                    if (args.length != 1) {
+                        return [ "array", args ];
+                    } else {
+                        return walk([ "call", [ "name", "Array" ], args ]);
+                    }
+                } else if (ctor[1] == "Object" && !scope.has("Object")) {
+                    if (!args.length) {
+                        return [ "object", [] ];
+                    } else {
+                        return walk([ "call", [ "name", "Object" ], args ]);
+                    }
+                } else if ((ctor[1] == "RegExp" || ctor[1] == "Function" || ctor[1] == "Error") && !scope.has(ctor[1])) {
+                    return walk([ "call", [ "name", ctor[1] ], args]);
+                }
+            }
+        },
+        "call": function(expr, args) {
+            if (expr[0] == "dot" && expr[1][0] == "string" && args.length == 1
+                && (args[0][1] > 0 && expr[2] == "substring" || expr[2] == "substr")) {
+                return [ "call", [ "dot", expr[1], "slice"], args];
+            }
+            if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
+                // foo.toString()  ==>  foo+""
+                if (expr[1][0] == "string") return expr[1];
+                return [ "binary", "+", expr[1], [ "string", "" ]];
+            }
+            if (expr[0] == "name") {
+                if (expr[1] == "Array" && args.length != 1 && !scope.has("Array")) {
+                    return [ "array", args ];
+                }
+                if (expr[1] == "Object" && !args.length && !scope.has("Object")) {
+                    return [ "object", [] ];
+                }
+                if (expr[1] == "String" && !scope.has("String")) {
+                    return [ "binary", "+", args[0], [ "string", "" ]];
+                }
+            }
+        }
+    }, function() {
+        return walk(pro.ast_add_scope(ast));
+    });
+};
+
+exports.ast_squeeze_more = ast_squeeze_more;
+
+// Local variables:
+// js-indent-level: 4
+// End:

install/ui/util/uglifyjs/ug.js

@@ -0,0 +1 @@
+//just empty file to make rhino happy

install/ui/util/uglifyjs/uglify

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Authors:
+#    Petr Vobornik <pvoborni@redhat.com>
+#
+#  Copyright (C) 2012 Red Hat
+#  see file 'COPYING' for use and warranty information
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Wrapper for calling uglify.js under rhino
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+rhino -main $DIR/uglify-js.js $DIR/ug.js $1 $2 -v

install/ui/util/uglifyjs/uglify-js.js

@@ -0,0 +1,86 @@
+// Modified version of the orignal uglify-js.js. Modified to be runnable
+// under rhino by Petr Vobornik, Red Hat
+// writeFile(), read() code written by John Resig.
+
+function uglify(orig_code, options){
+    options || (options = {});
+    var jsp = uglify.parser;
+    var pro = uglify.uglify;
+
+    var ast = jsp.parse(orig_code, options.strict_semicolons); // parse code and get the initial AST
+    ast = pro.ast_mangle(ast, options.mangle_options); // get a new AST with mangled names
+    ast = pro.ast_squeeze(ast, options.squeeze_options); // get an AST with compression optimizations
+    var final_code = pro.gen_code(ast, options.gen_options); // compressed code here
+    return final_code;
+};
+
+uglify.parser = require("./lib/parse-js");
+uglify.uglify = require("./lib/process");
+uglify.consolidator = require("./lib/consolidator");
+
+module.exports = uglify
+
+
+importPackage(java.io);
+
+function writeFile( file, stream ) {
+    var buffer = new PrintWriter( new FileWriter( file ) );
+    buffer.print( stream );
+    buffer.close();
+}
+
+function read( file ) {
+    var f = new File(file);
+    var reader = new BufferedReader(new FileReader(f));
+    var line = null;
+    var buffer = new java.lang.StringBuffer(f.length());
+    while( (line = reader.readLine()) != null) {
+        buffer.append(line);
+        buffer.append("\n");
+    }
+    return buffer.toString();
+}
+
+var options = {
+    ast: false,
+    consolidate: false,
+    mangle: true,
+    mangle_toplevel: false,
+    no_mangle_functions: false,
+    squeeze: true,
+    make_seqs: true,
+    dead_code: true,
+    verbose: false,
+    show_copyright: true,
+    out_same_file: false,
+    max_line_length: 32 * 1024,
+    unsafe: false,
+    reserved_names: null,
+    defines: { },
+    lift_vars: false,
+    codegen_options: {
+        ascii_only: false,
+        beautify: false,
+        indent_level: 4,
+        indent_start: 0,
+        quote_keys: false,
+        space_colon: false,
+        inline_script: false
+    },
+    make: false,
+    output: true            // stdout
+};
+
+if (arguments.length < 2) {
+    print('Invalid input\nUsage: uglify inputFile outputFile');
+    quit();
+}
+
+if (arguments.indexOf('-v')) {
+    print('Uglifying '+arguments[0] +'\nOutput: '+arguments[1]);
+}
+
+//read input file
+var input = read(arguments[0]) + '';
+var output = uglify(input, options);
+writeFile(arguments[1], output);