基于Php和Mysql的项目管理软件

												require_once 'HTMLPurifier/AttrDef.php';								/**				 * Validates shorthand CSS property font.				 */				class HTMLPurifier_AttrDef_Font extends HTMLPurifier_AttrDef				{				    				    /**				     * Local copy of component validators.				     * 				     * @note If we moved specific CSS property definitions to their own				     *       classes instead of having them be assembled at run time by				     *       CSSDefinition, this wouldn't be necessary.  We'd instantiate				     *       our own copies.				     */				    var $info = array();				    				    /**				     * System font keywords.				     */				    var $system_fonts = array(				        'caption' => true,				        'icon' => true,				        'menu' => true,				        'message-box' => true,				        'small-caption' => true,				        'status-bar' => true				    );				    				    function HTMLPurifier_AttrDef_Font($config) {				        $def = $config->getCSSDefinition();				        $this->info['font-style']   = $def->info['font-style'];				        $this->info['font-variant'] = $def->info['font-variant'];				        $this->info['font-weight']  = $def->info['font-weight'];				        $this->info['font-size']    = $def->info['font-size'];				        $this->info['line-height']  = $def->info['line-height'];				        $this->info['font-family']  = $def->info['font-family'];				    }				    				    function validate($string, $config, &$context) {				        				        // regular pre-processing				        $string = $this->parseCDATA($string);				        if ($string === '') return false;				        				        // check if it's one of the keywords				        $lowercase_string = strtolower($string);				        if (isset($this->system_fonts[$lowercase_string])) {				            return $lowercase_string;				        }				        				        $bits = explode(' ', $string); // bits to process				        $stage = 0; // this indicates what we're looking for				        $caught = array(); // which stage 0 properties have we caught?				        $stage_1 = array('font-style', 'font-variant', 'font-weight');				        $final = ''; // output				        				        for ($i = 0, $size = count($bits); $i < $size; $i++) {				            if ($bits[$i] === '') continue;				            switch ($stage) {				                				                // attempting to catch font-style, font-variant or font-weight				                case 0:				                    foreach ($stage_1 as $validator_name) {				                        if (isset($caught[$validator_name])) continue;				                        $r = $this->info[$validator_name]->validate(				                                                $bits[$i], $config, $context);				                        if ($r !== false) {				                            $final .= $r . ' ';				                            $caught[$validator_name] = true;				                            break;				                        }				                    }				                    // all three caught, continue on				                    if (count($caught) >= 3) $stage = 1;				                    if ($r !== false) break;				                				                // attempting to catch font-size and perhaps line-height				                case 1:				                    $found_slash = false;				                    if (strpos($bits[$i], '/') !== false) {				                        list($font_size, $line_height) =				                                                    explode('/', $bits[$i]);				                        if ($line_height === '') {				                            // ooh, there's a space after the slash!				                            $line_height = false;				                            $found_slash = true;				                        }				                    } else {				                        $font_size = $bits[$i];				                        $line_height = false;				                    }				                    $r = $this->info['font-size']->validate(				                                              $font_size, $config, $context);				                    if ($r !== false) {				                        $final .= $r;				                        // attempt to catch line-height				                        if ($line_height === false) {				                            // we need to scroll forward				                            for ($j = $i + 1; $j < $size; $j++) {				                                if ($bits[$j] === '') continue;				                                if ($bits[$j] === '/') {				                                    if ($found_slash) {				                                        return false;				                                    } else {				                                        $found_slash = true;				                                        continue;				                                    }				                                }				                                $line_height = $bits[$j];				                                break;				                            }				                        } else {				                            // slash already found				                            $found_slash = true;				                            $j = $i;				                        }				                        if ($found_slash) {				                            $i = $j;				                            $r = $this->info['line-height']->validate(				                                              $line_height, $config, $context);				                            if ($r !== false) {				                                $final .= '/' . $r;				                            }				                        }				                        $final .= ' ';				                        $stage = 2;				                        break;				                    }				                    return false;				                				                // attempting to catch font-family				                case 2:				                    $font_family =				                        implode(' ', array_slice($bits, $i, $size - $i));				                    $r = $this->info['font-family']->validate(				                                              $font_family, $config, $context);				                    if ($r !== false) {				                        $final .= $r . ' ';				                        // processing completed successfully				                        return rtrim($final);				                    }				                    return false;				            }				        }				        return false;				    }				    				}								?>