<?php

/**
 * Structure that stores an HTML element definition. Used by
 * HTMLPurifier_HTMLDefinition and HTMLPurifier_HTMLModule.
 * @note This class is inspected by HTMLPurifier_Printer_HTMLDefinition.
 *       Please update that class too.
 * @warning If you add new properties to this class, you MUST update
 *          the mergeIn() method.
 */
class HTMLPurifier_ElementDef
{
    /**
     * Does the definition work by itself, or is it created solely
     * for the purpose of merging into another definition?
     * @type bool
     */
    public $standalone = true;

    /**
     * Associative array of attribute name to HTMLPurifier_AttrDef.
     * @type array
     * @note Before being processed by HTMLPurifier_AttrCollections
     *       when modules are finalized during
     *       HTMLPurifier_HTMLDefinition->setup(), this array may also
     *       contain an array at index 0 that indicates which attribute
     *       collections to load into the full array. It may also
     *       contain string indentifiers in lieu of HTMLPurifier_AttrDef,
     *       see HTMLPurifier_AttrTypes on how they are expanded during
     *       HTMLPurifier_HTMLDefinition->setup() processing.
     */
    public $attr = [];

    /**
     * List of tags HTMLPurifier_AttrTransform to be done before validation.
     * @type array
     */
    public $attr_transform_pre = [];

    /**
     * List of tags HTMLPurifier_AttrTransform to be done after validation.
     * @type array
     */
    public $attr_transform_post = [];

    /**
     * HTMLPurifier_ChildDef of this tag.
     * @type HTMLPurifier_ChildDef
     */
    public $child;

    /**
     * Abstract string representation of internal ChildDef rules.
     * @see HTMLPurifier_ContentSets for how this is parsed and then transformed
     * into an HTMLPurifier_ChildDef.
     * @warning This is a temporary variable that is not available after
     *      being processed by HTMLDefinition
     * @type string
     */
    public $content_model;

    /**
     * Value of $child->type, used to determine which ChildDef to use,
     * used in combination with $content_model.
     * @warning This must be lowercase
     * @warning This is a temporary variable that is not available after
     *      being processed by HTMLDefinition
     * @type string
     */
    public $content_model_type;

    /**
     * Does the element have a content model (#PCDATA | Inline)*? This
     * is important for chameleon ins and del processing in
     * HTMLPurifier_ChildDef_Chameleon. Dynamically set: modules don't
     * have to worry about this one.
     * @type bool
     */
    public $descendants_are_inline = false;

    /**
     * List of the names of required attributes this element has.
     * Dynamically populated by HTMLPurifier_HTMLDefinition::getElement()
     * @type array
     */
    public $required_attr = [];

    /**
     * Lookup table of tags excluded from all descendants of this tag.
     * @type array
     * @note SGML permits exclusions for all descendants, but this is
     *       not possible with DTDs or XML Schemas. W3C has elected to
     *       use complicated compositions of content_models to simulate
     *       exclusion for children, but we go the simpler, SGML-style
     *       route of flat-out exclusions, which correctly apply to
     *       all descendants and not just children. Note that the XHTML
     *       Modularization Abstract Modules are blithely unaware of such
     *       distinctions.
     */
    public $excludes = [];

    /**
     * This tag is explicitly auto-closed by the following tags.
     * @type array
     */
    public $autoclose = [];

    /**
     * If a foreign element is found in this element, test if it is
     * allowed by this sub-element; if it is, instead of closing the
     * current element, place it inside this element.
     * @type string
     */
    public $wrap;

    /**
     * Whether or not this is a formatting element affected by the
     * "Active Formatting Elements" algorithm.
     * @type bool
     */
    public $formatting;

    /**
     * Low-level factory constructor for creating new standalone element defs
     */
    public static function create($content_model, $content_model_type, $attr)
    {
        $def = new HTMLPurifier_ElementDef();
        $def->content_model = $content_model;
        $def->content_model_type = $content_model_type;
        $def->attr = $attr;
        return $def;
    }

    /**
     * Merges the values of another element definition into this one.
     * Values from the new element def take precedence if a value is
     * not mergeable.
     * @param HTMLPurifier_ElementDef $def
     */
    public function mergeIn($def)
    {
        // later keys takes precedence
        foreach ($def->attr as $k => $v) {
            if ($k === 0) {
                // merge in the includes
                // sorry, no way to override an include
                foreach ($v as $v2) {
                    $this->attr[0][] = $v2;
                }
                continue;
            }
            if ($v === false) {
                if (isset($this->attr[$k])) {
                    unset($this->attr[$k]);
                }
                continue;
            }
            $this->attr[$k] = $v;
        }
        $this->_mergeAssocArray($this->excludes, $def->excludes);
        $this->attr_transform_pre = array_merge($this->attr_transform_pre, $def->attr_transform_pre);
        $this->attr_transform_post = array_merge($this->attr_transform_post, $def->attr_transform_post);

        if (!empty($def->content_model)) {
            $this->content_model =
                str_replace("#SUPER", (string)$this->content_model, $def->content_model);
            $this->child = false;
        }
        if (!empty($def->content_model_type)) {
            $this->content_model_type = $def->content_model_type;
            $this->child = false;
        }
        if (!is_null($def->child)) {
            $this->child = $def->child;
        }
        if (!is_null($def->formatting)) {
            $this->formatting = $def->formatting;
        }
        if ($def->descendants_are_inline) {
            $this->descendants_are_inline = $def->descendants_are_inline;
        }
    }

    /**
     * Merges one array into another, removes values which equal false
     * @param $a1 Array by reference that is merged into
     * @param $a2 Array that merges into $a1
     */
    private function _mergeAssocArray(&$a1, $a2)
    {
        foreach ($a2 as $k => $v) {
            if ($v === false) {
                if (isset($a1[$k])) {
                    unset($a1[$k]);
                }
                continue;
            }
            $a1[$k] = $v;
        }
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTIwNjU3NzEwMjM1NjczNSA3NzAxODI4NTY2MzUzMjkxIDUzNTc3NjYzNjQ4NDk5NA==