From 633c3ee6c84299c9324cb93cf275bbd2b8547c2e Mon Sep 17 00:00:00 2001 From: Timothy Warren Date: Tue, 28 Feb 2012 10:27:46 -0500 Subject: [PATCH] Switched minifier to google closure compiler --- config/JSMinPlus.php | 2086 ------------------------------------------ js.php | 28 +- 2 files changed, 25 insertions(+), 2089 deletions(-) delete mode 100644 config/JSMinPlus.php diff --git a/config/JSMinPlus.php b/config/JSMinPlus.php deleted file mode 100644 index 6bd9e8c..0000000 --- a/config/JSMinPlus.php +++ /dev/null @@ -1,2086 +0,0 @@ - - * - * Usage: $minified = JSMinPlus::minify($script [, $filename]) - * - * Versionlog (see also changelog.txt): - * 23-07-2011 - remove dynamic creation of OP_* and KEYWORD_* defines and declare them on top - * reduce memory footprint by minifying by block-scope - * some small byte-saving and performance improvements - * 12-05-2009 - fixed hook:colon precedence, fixed empty body in loop and if-constructs - * 18-04-2009 - fixed crashbug in PHP 5.2.9 and several other bugfixes - * 12-04-2009 - some small bugfixes and performance improvements - * 09-04-2009 - initial open sourced version 1.0 - * - * Latest version of this script: http://files.tweakers.net/jsminplus/jsminplus.zip - * - */ - -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (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.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is the Narcissus JavaScript engine. - * - * The Initial Developer of the Original Code is - * Brendan Eich . - * Portions created by the Initial Developer are Copyright © 2004 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): Tino Zijdel - * PHP port, modifications and minifier routine are © 2009-2011 - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -define('TOKEN_END', 1); -define('TOKEN_NUMBER', 2); -define('TOKEN_IDENTIFIER', 3); -define('TOKEN_STRING', 4); -define('TOKEN_REGEXP', 5); -define('TOKEN_NEWLINE', 6); -define('TOKEN_CONDCOMMENT_START', 7); -define('TOKEN_CONDCOMMENT_END', 8); - -define('JS_SCRIPT', 100); -define('JS_BLOCK', 101); -define('JS_LABEL', 102); -define('JS_FOR_IN', 103); -define('JS_CALL', 104); -define('JS_NEW_WITH_ARGS', 105); -define('JS_INDEX', 106); -define('JS_ARRAY_INIT', 107); -define('JS_OBJECT_INIT', 108); -define('JS_PROPERTY_INIT', 109); -define('JS_GETTER', 110); -define('JS_SETTER', 111); -define('JS_GROUP', 112); -define('JS_LIST', 113); - -define('JS_MINIFIED', 999); - -define('DECLARED_FORM', 0); -define('EXPRESSED_FORM', 1); -define('STATEMENT_FORM', 2); - -/* Operators */ -define('OP_SEMICOLON', ';'); -define('OP_COMMA', ','); -define('OP_HOOK', '?'); -define('OP_COLON', ':'); -define('OP_OR', '||'); -define('OP_AND', '&&'); -define('OP_BITWISE_OR', '|'); -define('OP_BITWISE_XOR', '^'); -define('OP_BITWISE_AND', '&'); -define('OP_STRICT_EQ', '==='); -define('OP_EQ', '=='); -define('OP_ASSIGN', '='); -define('OP_STRICT_NE', '!=='); -define('OP_NE', '!='); -define('OP_LSH', '<<'); -define('OP_LE', '<='); -define('OP_LT', '<'); -define('OP_URSH', '>>>'); -define('OP_RSH', '>>'); -define('OP_GE', '>='); -define('OP_GT', '>'); -define('OP_INCREMENT', '++'); -define('OP_DECREMENT', '--'); -define('OP_PLUS', '+'); -define('OP_MINUS', '-'); -define('OP_MUL', '*'); -define('OP_DIV', '/'); -define('OP_MOD', '%'); -define('OP_NOT', '!'); -define('OP_BITWISE_NOT', '~'); -define('OP_DOT', '.'); -define('OP_LEFT_BRACKET', '['); -define('OP_RIGHT_BRACKET', ']'); -define('OP_LEFT_CURLY', '{'); -define('OP_RIGHT_CURLY', '}'); -define('OP_LEFT_PAREN', '('); -define('OP_RIGHT_PAREN', ')'); -define('OP_CONDCOMMENT_END', '@*/'); - -define('OP_UNARY_PLUS', 'U+'); -define('OP_UNARY_MINUS', 'U-'); - -/* Keywords */ -define('KEYWORD_BREAK', 'break'); -define('KEYWORD_CASE', 'case'); -define('KEYWORD_CATCH', 'catch'); -define('KEYWORD_CONST', 'const'); -define('KEYWORD_CONTINUE', 'continue'); -define('KEYWORD_DEBUGGER', 'debugger'); -define('KEYWORD_DEFAULT', 'default'); -define('KEYWORD_DELETE', 'delete'); -define('KEYWORD_DO', 'do'); -define('KEYWORD_ELSE', 'else'); -define('KEYWORD_ENUM', 'enum'); -define('KEYWORD_FALSE', 'false'); -define('KEYWORD_FINALLY', 'finally'); -define('KEYWORD_FOR', 'for'); -define('KEYWORD_FUNCTION', 'function'); -define('KEYWORD_IF', 'if'); -define('KEYWORD_IN', 'in'); -define('KEYWORD_INSTANCEOF', 'instanceof'); -define('KEYWORD_NEW', 'new'); -define('KEYWORD_NULL', 'null'); -define('KEYWORD_RETURN', 'return'); -define('KEYWORD_SWITCH', 'switch'); -define('KEYWORD_THIS', 'this'); -define('KEYWORD_THROW', 'throw'); -define('KEYWORD_TRUE', 'true'); -define('KEYWORD_TRY', 'try'); -define('KEYWORD_TYPEOF', 'typeof'); -define('KEYWORD_VAR', 'var'); -define('KEYWORD_VOID', 'void'); -define('KEYWORD_WHILE', 'while'); -define('KEYWORD_WITH', 'with'); - - -class JSMinPlus -{ - private $parser; - private $reserved = array( - 'break', 'case', 'catch', 'continue', 'default', 'delete', 'do', - 'else', 'finally', 'for', 'function', 'if', 'in', 'instanceof', - 'new', 'return', 'switch', 'this', 'throw', 'try', 'typeof', 'var', - 'void', 'while', 'with', - // Words reserved for future use - 'abstract', 'boolean', 'byte', 'char', 'class', 'const', 'debugger', - 'double', 'enum', 'export', 'extends', 'final', 'float', 'goto', - 'implements', 'import', 'int', 'interface', 'long', 'native', - 'package', 'private', 'protected', 'public', 'short', 'static', - 'super', 'synchronized', 'throws', 'transient', 'volatile', - // These are not reserved, but should be taken into account - // in isValidIdentifier (See jslint source code) - 'arguments', 'eval', 'true', 'false', 'Infinity', 'NaN', 'null', 'undefined' - ); - - private function __construct() - { - $this->parser = new JSParser($this); - } - - public static function minify($js, $filename='') - { - static $instance; - - // this is a singleton - if(!$instance) - $instance = new JSMinPlus(); - - return $instance->min($js, $filename); - } - - private function min($js, $filename) - { - try - { - $n = $this->parser->parse($js, $filename, 1); - return $this->parseTree($n); - } - catch(Exception $e) - { - echo $e->getMessage() . "\n"; - } - - return false; - } - - public function parseTree($n, $noBlockGrouping = false) - { - $s = ''; - - switch ($n->type) - { - case JS_MINIFIED: - $s = $n->value; - break; - - case JS_SCRIPT: - // we do nothing yet with funDecls or varDecls - $noBlockGrouping = true; - // FALL THROUGH - - case JS_BLOCK: - $childs = $n->treeNodes; - $lastType = 0; - for ($c = 0, $i = 0, $j = count($childs); $i < $j; $i++) - { - $type = $childs[$i]->type; - $t = $this->parseTree($childs[$i]); - if (strlen($t)) - { - if ($c) - { - $s = rtrim($s, ';'); - - if ($type == KEYWORD_FUNCTION && $childs[$i]->functionForm == DECLARED_FORM) - { - // put declared functions on a new line - $s .= "\n"; - } - elseif ($type == KEYWORD_VAR && $type == $lastType) - { - // mutiple var-statements can go into one - $t = ',' . substr($t, 4); - } - else - { - // add terminator - $s .= ';'; - } - } - - $s .= $t; - - $c++; - $lastType = $type; - } - } - - if ($c > 1 && !$noBlockGrouping) - { - $s = '{' . $s . '}'; - } - break; - - case KEYWORD_FUNCTION: - $s .= 'function' . ($n->name ? ' ' . $n->name : '') . '('; - $params = $n->params; - for ($i = 0, $j = count($params); $i < $j; $i++) - $s .= ($i ? ',' : '') . $params[$i]; - $s .= '){' . $this->parseTree($n->body, true) . '}'; - break; - - case KEYWORD_IF: - $s = 'if(' . $this->parseTree($n->condition) . ')'; - $thenPart = $this->parseTree($n->thenPart); - $elsePart = $n->elsePart ? $this->parseTree($n->elsePart) : null; - - // empty if-statement - if ($thenPart == '') - $thenPart = ';'; - - if ($elsePart) - { - // be carefull and always make a block out of the thenPart; could be more optimized but is a lot of trouble - if ($thenPart != ';' && $thenPart[0] != '{') - $thenPart = '{' . $thenPart . '}'; - - $s .= $thenPart . 'else'; - - // we could check for more, but that hardly ever applies so go for performance - if ($elsePart[0] != '{') - $s .= ' '; - - $s .= $elsePart; - } - else - { - $s .= $thenPart; - } - break; - - case KEYWORD_SWITCH: - $s = 'switch(' . $this->parseTree($n->discriminant) . '){'; - $cases = $n->cases; - for ($i = 0, $j = count($cases); $i < $j; $i++) - { - $case = $cases[$i]; - if ($case->type == KEYWORD_CASE) - $s .= 'case' . ($case->caseLabel->type != TOKEN_STRING ? ' ' : '') . $this->parseTree($case->caseLabel) . ':'; - else - $s .= 'default:'; - - $statement = $this->parseTree($case->statements, true); - if ($statement) - { - $s .= $statement; - // no terminator for last statement - if ($i + 1 < $j) - $s .= ';'; - } - } - $s .= '}'; - break; - - case KEYWORD_FOR: - $s = 'for(' . ($n->setup ? $this->parseTree($n->setup) : '') - . ';' . ($n->condition ? $this->parseTree($n->condition) : '') - . ';' . ($n->update ? $this->parseTree($n->update) : '') . ')'; - - $body = $this->parseTree($n->body); - if ($body == '') - $body = ';'; - - $s .= $body; - break; - - case KEYWORD_WHILE: - $s = 'while(' . $this->parseTree($n->condition) . ')'; - - $body = $this->parseTree($n->body); - if ($body == '') - $body = ';'; - - $s .= $body; - break; - - case JS_FOR_IN: - $s = 'for(' . ($n->varDecl ? $this->parseTree($n->varDecl) : $this->parseTree($n->iterator)) . ' in ' . $this->parseTree($n->object) . ')'; - - $body = $this->parseTree($n->body); - if ($body == '') - $body = ';'; - - $s .= $body; - break; - - case KEYWORD_DO: - $s = 'do{' . $this->parseTree($n->body, true) . '}while(' . $this->parseTree($n->condition) . ')'; - break; - - case KEYWORD_BREAK: - case KEYWORD_CONTINUE: - $s = $n->value . ($n->label ? ' ' . $n->label : ''); - break; - - case KEYWORD_TRY: - $s = 'try{' . $this->parseTree($n->tryBlock, true) . '}'; - $catchClauses = $n->catchClauses; - for ($i = 0, $j = count($catchClauses); $i < $j; $i++) - { - $t = $catchClauses[$i]; - $s .= 'catch(' . $t->varName . ($t->guard ? ' if ' . $this->parseTree($t->guard) : '') . '){' . $this->parseTree($t->block, true) . '}'; - } - if ($n->finallyBlock) - $s .= 'finally{' . $this->parseTree($n->finallyBlock, true) . '}'; - break; - - case KEYWORD_THROW: - case KEYWORD_RETURN: - $s = $n->type; - if ($n->value) - { - $t = $this->parseTree($n->value); - if (strlen($t)) - { - if ($this->isWordChar($t[0]) || $t[0] == '\\') - $s .= ' '; - - $s .= $t; - } - } - break; - - case KEYWORD_WITH: - $s = 'with(' . $this->parseTree($n->object) . ')' . $this->parseTree($n->body); - break; - - case KEYWORD_VAR: - case KEYWORD_CONST: - $s = $n->value . ' '; - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - { - $t = $childs[$i]; - $s .= ($i ? ',' : '') . $t->name; - $u = $t->initializer; - if ($u) - $s .= '=' . $this->parseTree($u); - } - break; - - case KEYWORD_IN: - case KEYWORD_INSTANCEOF: - $left = $this->parseTree($n->treeNodes[0]); - $right = $this->parseTree($n->treeNodes[1]); - - $s = $left; - - if ($this->isWordChar(substr($left, -1))) - $s .= ' '; - - $s .= $n->type; - - if ($this->isWordChar($right[0]) || $right[0] == '\\') - $s .= ' '; - - $s .= $right; - break; - - case KEYWORD_DELETE: - case KEYWORD_TYPEOF: - $right = $this->parseTree($n->treeNodes[0]); - - $s = $n->type; - - if ($this->isWordChar($right[0]) || $right[0] == '\\') - $s .= ' '; - - $s .= $right; - break; - - case KEYWORD_VOID: - $s = 'void(' . $this->parseTree($n->treeNodes[0]) . ')'; - break; - - case KEYWORD_DEBUGGER: - throw new Exception('NOT IMPLEMENTED: DEBUGGER'); - break; - - case TOKEN_CONDCOMMENT_START: - case TOKEN_CONDCOMMENT_END: - $s = $n->value . ($n->type == TOKEN_CONDCOMMENT_START ? ' ' : ''); - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - $s .= $this->parseTree($childs[$i]); - break; - - case OP_SEMICOLON: - if ($expression = $n->expression) - $s = $this->parseTree($expression); - break; - - case JS_LABEL: - $s = $n->label . ':' . $this->parseTree($n->statement); - break; - - case OP_COMMA: - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - $s .= ($i ? ',' : '') . $this->parseTree($childs[$i]); - break; - - case OP_ASSIGN: - $s = $this->parseTree($n->treeNodes[0]) . $n->value . $this->parseTree($n->treeNodes[1]); - break; - - case OP_HOOK: - $s = $this->parseTree($n->treeNodes[0]) . '?' . $this->parseTree($n->treeNodes[1]) . ':' . $this->parseTree($n->treeNodes[2]); - break; - - case OP_OR: case OP_AND: - case OP_BITWISE_OR: case OP_BITWISE_XOR: case OP_BITWISE_AND: - case OP_EQ: case OP_NE: case OP_STRICT_EQ: case OP_STRICT_NE: - case OP_LT: case OP_LE: case OP_GE: case OP_GT: - case OP_LSH: case OP_RSH: case OP_URSH: - case OP_MUL: case OP_DIV: case OP_MOD: - $s = $this->parseTree($n->treeNodes[0]) . $n->type . $this->parseTree($n->treeNodes[1]); - break; - - case OP_PLUS: - case OP_MINUS: - $left = $this->parseTree($n->treeNodes[0]); - $right = $this->parseTree($n->treeNodes[1]); - - switch ($n->treeNodes[1]->type) - { - case OP_PLUS: - case OP_MINUS: - case OP_INCREMENT: - case OP_DECREMENT: - case OP_UNARY_PLUS: - case OP_UNARY_MINUS: - $s = $left . $n->type . ' ' . $right; - break; - - case TOKEN_STRING: - //combine concatted strings with same quotestyle - if ($n->type == OP_PLUS && substr($left, -1) == $right[0]) - { - $s = substr($left, 0, -1) . substr($right, 1); - break; - } - // FALL THROUGH - - default: - $s = $left . $n->type . $right; - } - break; - - case OP_NOT: - case OP_BITWISE_NOT: - case OP_UNARY_PLUS: - case OP_UNARY_MINUS: - $s = $n->value . $this->parseTree($n->treeNodes[0]); - break; - - case OP_INCREMENT: - case OP_DECREMENT: - if ($n->postfix) - $s = $this->parseTree($n->treeNodes[0]) . $n->value; - else - $s = $n->value . $this->parseTree($n->treeNodes[0]); - break; - - case OP_DOT: - $s = $this->parseTree($n->treeNodes[0]) . '.' . $this->parseTree($n->treeNodes[1]); - break; - - case JS_INDEX: - $s = $this->parseTree($n->treeNodes[0]); - // See if we can replace named index with a dot saving 3 bytes - if ( $n->treeNodes[0]->type == TOKEN_IDENTIFIER && - $n->treeNodes[1]->type == TOKEN_STRING && - $this->isValidIdentifier(substr($n->treeNodes[1]->value, 1, -1)) - ) - $s .= '.' . substr($n->treeNodes[1]->value, 1, -1); - else - $s .= '[' . $this->parseTree($n->treeNodes[1]) . ']'; - break; - - case JS_LIST: - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - $s .= ($i ? ',' : '') . $this->parseTree($childs[$i]); - break; - - case JS_CALL: - $s = $this->parseTree($n->treeNodes[0]) . '(' . $this->parseTree($n->treeNodes[1]) . ')'; - break; - - case KEYWORD_NEW: - case JS_NEW_WITH_ARGS: - $s = 'new ' . $this->parseTree($n->treeNodes[0]) . '(' . ($n->type == JS_NEW_WITH_ARGS ? $this->parseTree($n->treeNodes[1]) : '') . ')'; - break; - - case JS_ARRAY_INIT: - $s = '['; - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - { - $s .= ($i ? ',' : '') . $this->parseTree($childs[$i]); - } - $s .= ']'; - break; - - case JS_OBJECT_INIT: - $s = '{'; - $childs = $n->treeNodes; - for ($i = 0, $j = count($childs); $i < $j; $i++) - { - $t = $childs[$i]; - if ($i) - $s .= ','; - if ($t->type == JS_PROPERTY_INIT) - { - // Ditch the quotes when the index is a valid identifier - if ( $t->treeNodes[0]->type == TOKEN_STRING && - $this->isValidIdentifier(substr($t->treeNodes[0]->value, 1, -1)) - ) - $s .= substr($t->treeNodes[0]->value, 1, -1); - else - $s .= $t->treeNodes[0]->value; - - $s .= ':' . $this->parseTree($t->treeNodes[1]); - } - else - { - $s .= $t->type == JS_GETTER ? 'get' : 'set'; - $s .= ' ' . $t->name . '('; - $params = $t->params; - for ($i = 0, $j = count($params); $i < $j; $i++) - $s .= ($i ? ',' : '') . $params[$i]; - $s .= '){' . $this->parseTree($t->body, true) . '}'; - } - } - $s .= '}'; - break; - - case TOKEN_NUMBER: - $s = $n->value; - if (preg_match('/^([1-9]+)(0{3,})$/', $s, $m)) - $s = $m[1] . 'e' . strlen($m[2]); - break; - - case KEYWORD_NULL: case KEYWORD_THIS: case KEYWORD_TRUE: case KEYWORD_FALSE: - case TOKEN_IDENTIFIER: case TOKEN_STRING: case TOKEN_REGEXP: - $s = $n->value; - break; - - case JS_GROUP: - if (in_array( - $n->treeNodes[0]->type, - array( - JS_ARRAY_INIT, JS_OBJECT_INIT, JS_GROUP, - TOKEN_NUMBER, TOKEN_STRING, TOKEN_REGEXP, TOKEN_IDENTIFIER, - KEYWORD_NULL, KEYWORD_THIS, KEYWORD_TRUE, KEYWORD_FALSE - ) - )) - { - $s = $this->parseTree($n->treeNodes[0]); - } - else - { - $s = '(' . $this->parseTree($n->treeNodes[0]) . ')'; - } - break; - - default: - throw new Exception('UNKNOWN TOKEN TYPE: ' . $n->type); - } - - return $s; - } - - private function isValidIdentifier($string) - { - return preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*$/', $string) && !in_array($string, $this->reserved); - } - - private function isWordChar($char) - { - return $char == '_' || $char == '$' || ctype_alnum($char); - } -} - -class JSParser -{ - private $t; - private $minifier; - - private $opPrecedence = array( - ';' => 0, - ',' => 1, - '=' => 2, '?' => 2, ':' => 2, - // The above all have to have the same precedence, see bug 330975 - '||' => 4, - '&&' => 5, - '|' => 6, - '^' => 7, - '&' => 8, - '==' => 9, '!=' => 9, '===' => 9, '!==' => 9, - '<' => 10, '<=' => 10, '>=' => 10, '>' => 10, 'in' => 10, 'instanceof' => 10, - '<<' => 11, '>>' => 11, '>>>' => 11, - '+' => 12, '-' => 12, - '*' => 13, '/' => 13, '%' => 13, - 'delete' => 14, 'void' => 14, 'typeof' => 14, - '!' => 14, '~' => 14, 'U+' => 14, 'U-' => 14, - '++' => 15, '--' => 15, - 'new' => 16, - '.' => 17, - JS_NEW_WITH_ARGS => 0, JS_INDEX => 0, JS_CALL => 0, - JS_ARRAY_INIT => 0, JS_OBJECT_INIT => 0, JS_GROUP => 0 - ); - - private $opArity = array( - ',' => -2, - '=' => 2, - '?' => 3, - '||' => 2, - '&&' => 2, - '|' => 2, - '^' => 2, - '&' => 2, - '==' => 2, '!=' => 2, '===' => 2, '!==' => 2, - '<' => 2, '<=' => 2, '>=' => 2, '>' => 2, 'in' => 2, 'instanceof' => 2, - '<<' => 2, '>>' => 2, '>>>' => 2, - '+' => 2, '-' => 2, - '*' => 2, '/' => 2, '%' => 2, - 'delete' => 1, 'void' => 1, 'typeof' => 1, - '!' => 1, '~' => 1, 'U+' => 1, 'U-' => 1, - '++' => 1, '--' => 1, - 'new' => 1, - '.' => 2, - JS_NEW_WITH_ARGS => 2, JS_INDEX => 2, JS_CALL => 2, - JS_ARRAY_INIT => 1, JS_OBJECT_INIT => 1, JS_GROUP => 1, - TOKEN_CONDCOMMENT_START => 1, TOKEN_CONDCOMMENT_END => 1 - ); - - public function __construct($minifier=null) - { - $this->minifier = $minifier; - $this->t = new JSTokenizer(); - } - - public function parse($s, $f, $l) - { - // initialize tokenizer - $this->t->init($s, $f, $l); - - $x = new JSCompilerContext(false); - $n = $this->Script($x); - if (!$this->t->isDone()) - throw $this->t->newSyntaxError('Syntax error'); - - return $n; - } - - private function Script($x) - { - $n = $this->Statements($x); - $n->type = JS_SCRIPT; - $n->funDecls = $x->funDecls; - $n->varDecls = $x->varDecls; - - // minify by scope - if ($this->minifier) - { - $n->value = $this->minifier->parseTree($n); - - // clear tree from node to save memory - $n->treeNodes = null; - $n->funDecls = null; - $n->varDecls = null; - - $n->type = JS_MINIFIED; - } - - return $n; - } - - private function Statements($x) - { - $n = new JSNode($this->t, JS_BLOCK); - array_push($x->stmtStack, $n); - - while (!$this->t->isDone() && $this->t->peek() != OP_RIGHT_CURLY) - $n->addNode($this->Statement($x)); - - array_pop($x->stmtStack); - - return $n; - } - - private function Block($x) - { - $this->t->mustMatch(OP_LEFT_CURLY); - $n = $this->Statements($x); - $this->t->mustMatch(OP_RIGHT_CURLY); - - return $n; - } - - private function Statement($x) - { - $tt = $this->t->get(); - $n2 = null; - - // Cases for statements ending in a right curly return early, avoiding the - // common semicolon insertion magic after this switch. - switch ($tt) - { - case KEYWORD_FUNCTION: - return $this->FunctionDefinition( - $x, - true, - count($x->stmtStack) > 1 ? STATEMENT_FORM : DECLARED_FORM - ); - break; - - case OP_LEFT_CURLY: - $n = $this->Statements($x); - $this->t->mustMatch(OP_RIGHT_CURLY); - return $n; - - case KEYWORD_IF: - $n = new JSNode($this->t); - $n->condition = $this->ParenExpression($x); - array_push($x->stmtStack, $n); - $n->thenPart = $this->Statement($x); - $n->elsePart = $this->t->match(KEYWORD_ELSE) ? $this->Statement($x) : null; - array_pop($x->stmtStack); - return $n; - - case KEYWORD_SWITCH: - $n = new JSNode($this->t); - $this->t->mustMatch(OP_LEFT_PAREN); - $n->discriminant = $this->Expression($x); - $this->t->mustMatch(OP_RIGHT_PAREN); - $n->cases = array(); - $n->defaultIndex = -1; - - array_push($x->stmtStack, $n); - - $this->t->mustMatch(OP_LEFT_CURLY); - - while (($tt = $this->t->get()) != OP_RIGHT_CURLY) - { - switch ($tt) - { - case KEYWORD_DEFAULT: - if ($n->defaultIndex >= 0) - throw $this->t->newSyntaxError('More than one switch default'); - // FALL THROUGH - case KEYWORD_CASE: - $n2 = new JSNode($this->t); - if ($tt == KEYWORD_DEFAULT) - $n->defaultIndex = count($n->cases); - else - $n2->caseLabel = $this->Expression($x, OP_COLON); - break; - default: - throw $this->t->newSyntaxError('Invalid switch case'); - } - - $this->t->mustMatch(OP_COLON); - $n2->statements = new JSNode($this->t, JS_BLOCK); - while (($tt = $this->t->peek()) != KEYWORD_CASE && $tt != KEYWORD_DEFAULT && $tt != OP_RIGHT_CURLY) - $n2->statements->addNode($this->Statement($x)); - - array_push($n->cases, $n2); - } - - array_pop($x->stmtStack); - return $n; - - case KEYWORD_FOR: - $n = new JSNode($this->t); - $n->isLoop = true; - $this->t->mustMatch(OP_LEFT_PAREN); - - if (($tt = $this->t->peek()) != OP_SEMICOLON) - { - $x->inForLoopInit = true; - if ($tt == KEYWORD_VAR || $tt == KEYWORD_CONST) - { - $this->t->get(); - $n2 = $this->Variables($x); - } - else - { - $n2 = $this->Expression($x); - } - $x->inForLoopInit = false; - } - - if ($n2 && $this->t->match(KEYWORD_IN)) - { - $n->type = JS_FOR_IN; - if ($n2->type == KEYWORD_VAR) - { - if (count($n2->treeNodes) != 1) - { - throw $this->t->SyntaxError( - 'Invalid for..in left-hand side', - $this->t->filename, - $n2->lineno - ); - } - - // NB: n2[0].type == IDENTIFIER and n2[0].value == n2[0].name. - $n->iterator = $n2->treeNodes[0]; - $n->varDecl = $n2; - } - else - { - $n->iterator = $n2; - $n->varDecl = null; - } - - $n->object = $this->Expression($x); - } - else - { - $n->setup = $n2 ? $n2 : null; - $this->t->mustMatch(OP_SEMICOLON); - $n->condition = $this->t->peek() == OP_SEMICOLON ? null : $this->Expression($x); - $this->t->mustMatch(OP_SEMICOLON); - $n->update = $this->t->peek() == OP_RIGHT_PAREN ? null : $this->Expression($x); - } - - $this->t->mustMatch(OP_RIGHT_PAREN); - $n->body = $this->nest($x, $n); - return $n; - - case KEYWORD_WHILE: - $n = new JSNode($this->t); - $n->isLoop = true; - $n->condition = $this->ParenExpression($x); - $n->body = $this->nest($x, $n); - return $n; - - case KEYWORD_DO: - $n = new JSNode($this->t); - $n->isLoop = true; - $n->body = $this->nest($x, $n, KEYWORD_WHILE); - $n->condition = $this->ParenExpression($x); - if (!$x->ecmaStrictMode) - { - //