Subversion-Projekte lars-tiefland.php_share

<?php

// $Header: /cvsroot/html2ps/css.inc.php,v 1.28 2007/04/07 11:16:34 Konstantin Exp $

class CSS {

  var $_handlers;

  var $_mapping;

  var $_defaultState;

  var $_defaultStateFlags;

  function _getDefaultState() {

    if (!isset($this->_defaultState)) {

      $this->_defaultState = array();

      $handlers = $this->getHandlers();

      foreach ($handlers as $property => $handler) {

        $this->_defaultState[$property] = $handler->default_value();

      };

    };

    return $this->_defaultState;

  }

  function _getDefaultStateFlags() {

    if (!isset($this->_defaultStateFlags)) {

      $this->_defaultStateFlags = array();

      $handlers = $this->getHandlers();

      foreach ($handlers as $property => $handler) {

        $this->_defaultStateFlags[$property] = true;

      };

    };

    return $this->_defaultStateFlags;

  }

  function getHandlers() {

    return $this->_handlers;

  }

  function getInheritableTextHandlers() {

    if (!isset($this->_handlersInheritableText)) {

      $this->_handlersInheritabletext = array();

      foreach ($this->_handlers as $property => $handler) {

        if ($handler->isInheritableText()) {

          $this->_handlersInheritableText[$property] =& $this->_handlers[$property];

        };

      }

    }

    return $this->_handlersInheritableText;

  }

  function getInheritableHandlers() {

    if (!isset($this->_handlersInheritable)) {

      $this->_handlersInheritable = array();

      foreach ($this->_handlers as $property => $handler) {

        if ($handler->isInheritable()) {

          $this->_handlersInheritable[$property] =& $this->_handlers[$property];

        };

      }

    }

    return $this->_handlersInheritable;

  }

  function &get() {

    global $__g_css_handler_set;

    if (!isset($__g_css_handler_set)) {

      $__g_css_handler_set = new CSS();

    };

    return $__g_css_handler_set;

  }

  function CSS() {

    $this->_handlers = array();

    $this->_mapping  = array();

  }

  function getDefaultValue($property) {

    $css =& CSS::get();

    $handler =& $css->_get_handler($property);

    $value = $handler->default_value();

    if (is_object($value)) {

      return $value->copy();

    } else {

      return $value;

    };

  }

  function &get_handler($property) {

    $css =& CSS::get();

    $handler =& $css->_get_handler($property);

    return $handler;

  }

  function &_get_handler($property) {

    if (isset($this->_handlers[$property])) {

      return $this->_handlers[$property];

    } else {

      $dumb = null;

      return $dumb;

    };

  }

  function _name2code($key) {

    if (!isset($this->_mapping[$key])) {

      return null;

    };

    return $this->_mapping[$key];

  }

  function name2code($key) {

    $css =& CSS::get();

    return $css->_name2code($key);

  }

  function register_css_property(&$handler) {

    $property = $handler->get_property_code();

    $name     = $handler->get_property_name();

    $css =& CSS::get();

    $css->_handlers[$property] =& $handler;

    $css->_mapping[$name] = $property;

  }

  /**

   * Refer to CSS 2.1 G.2 Lexical scanner

   * h		[0-9a-f]

   * nonascii	[\200-\377]

   * unicode		\\{h}{1,6}(\r\n|[ \t\r\n\f])?

   * escape		{unicode}|\\[^\r\n\f0-9a-f]

   * nmstart		[_a-z]|{nonascii}|{escape}

   * nmchar		[_a-z0-9-]|{nonascii}|{escape}

   * ident		-?{nmstart}{nmchar}*

   */

  function get_identifier_regexp() {

    return '-?(?:[_a-z]|[\200-\377]|\\[0-9a-f]{1,6}(?:\r\n|[ \t\r\n\f])?|\\[^\r\n\f0-9a-f])(?:[_a-z0-9-]|[\200-\377]|\\[0-9a-f]{1,6}(?:\r\n|[ \t\r\n\f])?|\\[^\r\n\f0-9a-f])*';

  }

  function is_identifier($string) {

    return preg_match(sprintf('/%s/',

                              CSS::get_identifier_regexp()),

                      $string);

  }

  function parse_string($string) {

    if (preg_match(sprintf('/^(%s)\s*(.*)$/s', CSS_STRING1_REGEXP), $string, $matches)) {

      $value = $matches[1];

      $rest = $matches[2];

      $value = CSS::remove_backslash_at_newline($value);

      return array($value, $rest);

    };

    if (preg_match(sprintf('/^(%s)\s*(.*)$/s', CSS_STRING2_REGEXP), $string, $matches)) {

      $value = $matches[1];

      $rest = $matches[2];

      $value = CSS::remove_backslash_at_newline($value);

      return array($value, $rest);

    };

    return array(null, $string);

  }

  function remove_backslash_at_newline($value) {

    return preg_replace("/\\\\\n/", '', $value);

  }

}

?>