--- /dev/null
+<?php
+// @codingStandardsIgnoreFile
+// @ignore comment_docblock_file:file
+// @ignore style_curly_braces:file
+// @ignore style_string_spacing:file
+// @ignore style_else_spacing:file
+// @ignore comment_comment_docblock_missing:file
+// @ignore comment_comment_eg:file
+// @ignore production_code:file
+// @ignore druplart_unary:file
+// @ignore style_uppercase_constants:file
+// @ignore comment_comment_space:file
+// @ignore druplart_conditional_assignment:file
+// @ignore style_paren_spacing:file
+// @ignore style_no_tabs:file
+// @ignore comment_docblock_comment:file
+// @ignore style_control_spacing:file
+// @ignore comment_comment_indent:file
+// @ignore :file
+
+/*
+ * This file is part of the JShrink package.
+ *
+ * (c) Robert Hafner <tedivm@tedivm.com>
+ */
+
+/*
+Copyright (c) 2009, Robert Hafner
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ * Neither the name of the Stash Project nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL Robert Hafner BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/**
+ * JShrink
+ *
+ *
+ * @package JShrink
+ * @author Robert Hafner <tedivm@tedivm.com>
+ */
+
+namespace JShrink;
+
+/**
+ * Minifier
+ *
+ * Usage - Minifier::minify($js);
+ * Usage - Minifier::minify($js, $options);
+ * Usage - Minifier::minify($js, array('flaggedComments' => false));
+ *
+ * @package JShrink
+ * @author Robert Hafner <tedivm@tedivm.com>
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+class Minifier
+{
+ /**
+ * The input javascript to be minified.
+ *
+ * @var string
+ */
+ protected $input;
+
+ /**
+ * The location of the character (in the input string) that is next to be
+ * processed.
+ *
+ * @var int
+ */
+ protected $index = 0;
+
+ /**
+ * The first of the characters currently being looked at.
+ *
+ * @var string
+ */
+ protected $a = '';
+
+ /**
+ * The next character being looked at (after a);
+ *
+ * @var string
+ */
+ protected $b = '';
+
+ /**
+ * This character is only active when certain look ahead actions take place.
+ *
+ * @var string
+ */
+ protected $c;
+
+ /**
+ * Contains the options for the current minification process.
+ *
+ * @var array
+ */
+ protected $options;
+
+ /**
+ * Contains the default options for minification. This array is merged with
+ * the one passed in by the user to create the request specific set of
+ * options (stored in the $options attribute).
+ *
+ * @var array
+ */
+ protected static $defaultOptions = array('flaggedComments' => true);
+
+ /**
+ * Contains lock ids which are used to replace certain code patterns and
+ * prevent them from being minified
+ *
+ * @var array
+ */
+ protected $locks = array();
+
+ /**
+ * Takes a string containing javascript and removes unneeded characters in
+ * order to shrink the code without altering it's functionality.
+ *
+ * @param string $js The raw javascript to be minified
+ * @param array $options Various runtime options in an associative array
+ * @throws \Exception
+ * @return bool|string
+ */
+ public static function minify($js, $options = array())
+ {
+ try {
+ ob_start();
+
+ $jshrink = new Minifier();
+ $js = $jshrink->lock($js);
+ $jshrink->minifyDirectToOutput($js, $options);
+
+ // Sometimes there's a leading new line, so we trim that out here.
+ $js = ltrim(ob_get_clean());
+ $js = $jshrink->unlock($js);
+ unset($jshrink);
+
+ return $js;
+
+ } catch (\Exception $e) {
+
+ if (isset($jshrink)) {
+ // Since the breakdownScript function probably wasn't finished
+ // we clean it out before discarding it.
+ $jshrink->clean();
+ unset($jshrink);
+ }
+
+ // without this call things get weird, with partially outputted js.
+ ob_end_clean();
+ throw $e;
+ }
+ }
+
+ /**
+ * Processes a javascript string and outputs only the required characters,
+ * stripping out all unneeded characters.
+ *
+ * @param string $js The raw javascript to be minified
+ * @param array $options Various runtime options in an associative array
+ */
+ protected function minifyDirectToOutput($js, $options)
+ {
+ $this->initialize($js, $options);
+ $this->loop();
+ $this->clean();
+ }
+
+ /**
+ * Initializes internal variables, normalizes new lines,
+ *
+ * @param string $js The raw javascript to be minified
+ * @param array $options Various runtime options in an associative array
+ */
+ protected function initialize($js, $options)
+ {
+ $this->options = array_merge(static::$defaultOptions, $options);
+ $js = str_replace("\r\n", "\n", $js);
+ $js = str_replace('/**/', '', $js);
+ $this->input = str_replace("\r", "\n", $js);
+
+ // We add a newline to the end of the script to make it easier to deal
+ // with comments at the bottom of the script- this prevents the unclosed
+ // comment error that can otherwise occur.
+ $this->input .= PHP_EOL;
+
+ // Populate "a" with a new line, "b" with the first character, before
+ // entering the loop
+ $this->a = "\n";
+ $this->b = $this->getReal();
+ }
+
+ /**
+ * The primary action occurs here. This function loops through the input string,
+ * outputting anything that's relevant and discarding anything that is not.
+ */
+ protected function loop()
+ {
+ while ($this->a !== false && !is_null($this->a) && $this->a !== '') {
+
+ switch ($this->a) {
+ // new lines
+ case "\n":
+ // if the next line is something that can't stand alone preserve the newline
+ if (strpos('(-+{[@', $this->b) !== false) {
+ echo $this->a;
+ $this->saveString();
+ break;
+ }
+
+ // if B is a space we skip the rest of the switch block and go down to the
+ // string/regex check below, resetting $this->b with getReal
+ if($this->b === ' ')
+ break;
+
+ // otherwise we treat the newline like a space
+
+ case ' ':
+ if(static::isAlphaNumeric($this->b))
+ echo $this->a;
+
+ $this->saveString();
+ break;
+
+ default:
+ switch ($this->b) {
+ case "\n":
+ if (strpos('}])+-"\'', $this->a) !== false) {
+ echo $this->a;
+ $this->saveString();
+ break;
+ } else {
+ if (static::isAlphaNumeric($this->a)) {
+ echo $this->a;
+ $this->saveString();
+ }
+ }
+ break;
+
+ case ' ':
+ if(!static::isAlphaNumeric($this->a))
+ break;
+
+ default:
+ // check for some regex that breaks stuff
+ if ($this->a === '/' && ($this->b === '\'' || $this->b === '"')) {
+ $this->saveRegex();
+ continue;
+ }
+
+ echo $this->a;
+ $this->saveString();
+ break;
+ }
+ }
+
+ // do reg check of doom
+ $this->b = $this->getReal();
+
+ if(($this->b == '/' && strpos('(,=:[!&|?', $this->a) !== false))
+ $this->saveRegex();
+ }
+ }
+
+ /**
+ * Resets attributes that do not need to be stored between requests so that
+ * the next request is ready to go. Another reason for this is to make sure
+ * the variables are cleared and are not taking up memory.
+ */
+ protected function clean()
+ {
+ unset($this->input);
+ $this->index = 0;
+ $this->a = $this->b = '';
+ unset($this->c);
+ unset($this->options);
+ }
+
+ /**
+ * Returns the next string for processing based off of the current index.
+ *
+ * @return string
+ */
+ protected function getChar()
+ {
+ // Check to see if we had anything in the look ahead buffer and use that.
+ if (isset($this->c)) {
+ $char = $this->c;
+ unset($this->c);
+
+ // Otherwise we start pulling from the input.
+ } else {
+ $char = substr($this->input, $this->index, 1);
+
+ // If the next character doesn't exist return false.
+ if (isset($char) && $char === false) {
+ return false;
+ }
+
+ // Otherwise increment the pointer and use this char.
+ $this->index++;
+ }
+
+ // Normalize all whitespace except for the newline character into a
+ // standard space.
+ if($char !== "\n" && ord($char) < 32)
+
+ return ' ';
+
+ return $char;
+ }
+
+ /**
+ * This function gets the next "real" character. It is essentially a wrapper
+ * around the getChar function that skips comments. This has significant
+ * performance benefits as the skipping is done using native functions (ie,
+ * c code) rather than in script php.
+ *
+ *
+ * @return string Next 'real' character to be processed.
+ * @throws \RuntimeException
+ */
+ protected function getReal()
+ {
+ $startIndex = $this->index;
+ $char = $this->getChar();
+
+ // Check to see if we're potentially in a comment
+ if ($char !== '/') {
+ return $char;
+ }
+
+ $this->c = $this->getChar();
+
+ if ($this->c === '/') {
+ return $this->processOneLineComments($startIndex);
+
+ } elseif ($this->c === '*') {
+ return $this->processMultiLineComments($startIndex);
+ }
+
+ return $char;
+ }
+
+ /**
+ * Removed one line comments, with the exception of some very specific types of
+ * conditional comments.
+ *
+ * @param int $startIndex The index point where "getReal" function started
+ * @return string
+ */
+ protected function processOneLineComments($startIndex)
+ {
+ $thirdCommentString = substr($this->input, $this->index, 1);
+
+ // kill rest of line
+ $this->getNext("\n");
+
+ if ($thirdCommentString == '@') {
+ $endPoint = $this->index - $startIndex;
+ unset($this->c);
+ $char = "\n" . substr($this->input, $startIndex, $endPoint);
+ } else {
+ // first one is contents of $this->c
+ $this->getChar();
+ $char = $this->getChar();
+ }
+
+ return $char;
+ }
+
+ /**
+ * Skips multiline comments where appropriate, and includes them where needed.
+ * Conditional comments and "license" style blocks are preserved.
+ *
+ * @param int $startIndex The index point where "getReal" function started
+ * @return bool|string False if there's no character
+ * @throws \RuntimeException Unclosed comments will throw an error
+ */
+ protected function processMultiLineComments($startIndex)
+ {
+ $this->getChar(); // current C
+ $thirdCommentString = $this->getChar();
+
+ // kill everything up to the next */ if it's there
+ if ($this->getNext('*/')) {
+
+ $this->getChar(); // get *
+ $this->getChar(); // get /
+ $char = $this->getChar(); // get next real character
+
+ // Now we reinsert conditional comments and YUI-style licensing comments
+ if (($this->options['flaggedComments'] && $thirdCommentString === '!')
+ || ($thirdCommentString === '@') ) {
+
+ // If conditional comments or flagged comments are not the first thing in the script
+ // we need to echo a and fill it with a space before moving on.
+ if ($startIndex > 0) {
+ echo $this->a;
+ $this->a = " ";
+
+ // If the comment started on a new line we let it stay on the new line
+ if ($this->input[($startIndex - 1)] === "\n") {
+ echo "\n";
+ }
+ }
+
+ $endPoint = ($this->index - 1) - $startIndex;
+ echo substr($this->input, $startIndex, $endPoint);
+
+ return $char;
+ }
+
+ } else {
+ $char = false;
+ }
+
+ if($char === false)
+ throw new \RuntimeException('Unclosed multiline comment at position: ' . ($this->index - 2));
+
+ // if we're here c is part of the comment and therefore tossed
+ if(isset($this->c))
+ unset($this->c);
+
+ return $char;
+ }
+
+ /**
+ * Pushes the index ahead to the next instance of the supplied string. If it
+ * is found the first character of the string is returned and the index is set
+ * to it's position.
+ *
+ * @param string $string
+ * @return string|false Returns the first character of the string or false.
+ */
+ protected function getNext($string)
+ {
+ // Find the next occurrence of "string" after the current position.
+ $pos = strpos($this->input, $string, $this->index);
+
+ // If it's not there return false.
+ if($pos === false)
+
+ return false;
+
+ // Adjust position of index to jump ahead to the asked for string
+ $this->index = $pos;
+
+ // Return the first character of that string.
+ return substr($this->input, $this->index, 1);
+ }
+
+ /**
+ * When a javascript string is detected this function crawls for the end of
+ * it and saves the whole string.
+ *
+ * @throws \RuntimeException Unclosed strings will throw an error
+ */
+ protected function saveString()
+ {
+ $startpos = $this->index;
+
+ // saveString is always called after a gets cleared, so we push b into
+ // that spot.
+ $this->a = $this->b;
+
+ // If this isn't a string we don't need to do anything.
+ if ($this->a !== "'" && $this->a !== '"') {
+ return;
+ }
+
+ // String type is the quote used, " or '
+ $stringType = $this->a;
+
+ // Echo out that starting quote
+ echo $this->a;
+
+ // Loop until the string is done
+ while (true) {
+
+ // Grab the very next character and load it into a
+ $this->a = $this->getChar();
+
+ switch ($this->a) {
+
+ // If the string opener (single or double quote) is used
+ // output it and break out of the while loop-
+ // The string is finished!
+ case $stringType:
+ break 2;
+
+ // New lines in strings without line delimiters are bad- actual
+ // new lines will be represented by the string \n and not the actual
+ // character, so those will be treated just fine using the switch
+ // block below.
+ case "\n":
+ throw new \RuntimeException('Unclosed string at position: ' . $startpos );
+ break;
+
+ // Escaped characters get picked up here. If it's an escaped new line it's not really needed
+ case '\\':
+
+ // a is a slash. We want to keep it, and the next character,
+ // unless it's a new line. New lines as actual strings will be
+ // preserved, but escaped new lines should be reduced.
+ $this->b = $this->getChar();
+
+ // If b is a new line we discard a and b and restart the loop.
+ if ($this->b === "\n") {
+ break;
+ }
+
+ // echo out the escaped character and restart the loop.
+ echo $this->a . $this->b;
+ break;
+
+
+ // Since we're not dealing with any special cases we simply
+ // output the character and continue our loop.
+ default:
+ echo $this->a;
+ }
+ }
+ }
+
+ /**
+ * When a regular expression is detected this function crawls for the end of
+ * it and saves the whole regex.
+ *
+ * @throws \RuntimeException Unclosed regex will throw an error
+ */
+ protected function saveRegex()
+ {
+ echo $this->a . $this->b;
+
+ while (($this->a = $this->getChar()) !== false) {
+ if($this->a === '/')
+ break;
+
+ if ($this->a === '\\') {
+ echo $this->a;
+ $this->a = $this->getChar();
+ }
+
+ if($this->a === "\n")
+ throw new \RuntimeException('Unclosed regex pattern at position: ' . $this->index);
+
+ echo $this->a;
+ }
+ $this->b = $this->getReal();
+ }
+
+ /**
+ * Checks to see if a character is alphanumeric.
+ *
+ * @param string $char Just one character
+ * @return bool
+ */
+ protected static function isAlphaNumeric($char)
+ {
+ return preg_match('/^[\w\$\pL]$/', $char) === 1 || $char == '/';
+ }
+
+ /**
+ * Replace patterns in the given string and store the replacement
+ *
+ * @param string $js The string to lock
+ * @return bool
+ */
+ protected function lock($js)
+ {
+ /* lock things like <code>"asd" + ++x;</code> */
+ $lock = '"LOCK---' . crc32(time()) . '"';
+
+ $matches = array();
+ preg_match('/([+-])(\s+)([+-])/S', $js, $matches);
+ if (empty($matches)) {
+ return $js;
+ }
+
+ $this->locks[$lock] = $matches[2];
+
+ $js = preg_replace('/([+-])\s+([+-])/S', "$1{$lock}$2", $js);
+ /* -- */
+
+ return $js;
+ }
+
+ /**
+ * Replace "locks" with the original characters
+ *
+ * @param string $js The string to unlock
+ * @return bool
+ */
+ protected function unlock($js)
+ {
+ if (empty($this->locks)) {
+ return $js;
+ }
+
+ foreach ($this->locks as $lock => $replacement) {
+ $js = str_replace($lock, $replacement, $js);
+ }
+
+ return $js;
+ }
+
+}
projects / yaffs-website / blobdiff