From f718e2b0db0fe3477212a8dd6c3ec067f4432862 Mon Sep 17 00:00:00 2001
From: Klaus Weidenbach <Klaus.Weidenbach@gmx.net>
Date: Sat, 18 Mar 2017 17:50:05 +0100
Subject: :arrow_up: Update HTML Purifier library.

Updated HTML Purifier from 4.6.0 to 4.9.2 with better PHP7 compatibility.
Used composer to manage this library.
---
 .../library/HTMLPurifier/DoctypeRegistry.php       | 142 +++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 vendor/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php

(limited to 'vendor/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php')

diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php
new file mode 100644
index 000000000..acc1d64a6
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DoctypeRegistry.php
@@ -0,0 +1,142 @@
+<?php
+
+class HTMLPurifier_DoctypeRegistry
+{
+
+    /**
+     * Hash of doctype names to doctype objects.
+     * @type array
+     */
+    protected $doctypes;
+
+    /**
+     * Lookup table of aliases to real doctype names.
+     * @type array
+     */
+    protected $aliases;
+
+    /**
+     * Registers a doctype to the registry
+     * @note Accepts a fully-formed doctype object, or the
+     *       parameters for constructing a doctype object
+     * @param string $doctype Name of doctype or literal doctype object
+     * @param bool $xml
+     * @param array $modules Modules doctype will load
+     * @param array $tidy_modules Modules doctype will load for certain modes
+     * @param array $aliases Alias names for doctype
+     * @param string $dtd_public
+     * @param string $dtd_system
+     * @return HTMLPurifier_Doctype Editable registered doctype
+     */
+    public function register(
+        $doctype,
+        $xml = true,
+        $modules = array(),
+        $tidy_modules = array(),
+        $aliases = array(),
+        $dtd_public = null,
+        $dtd_system = null
+    ) {
+        if (!is_array($modules)) {
+            $modules = array($modules);
+        }
+        if (!is_array($tidy_modules)) {
+            $tidy_modules = array($tidy_modules);
+        }
+        if (!is_array($aliases)) {
+            $aliases = array($aliases);
+        }
+        if (!is_object($doctype)) {
+            $doctype = new HTMLPurifier_Doctype(
+                $doctype,
+                $xml,
+                $modules,
+                $tidy_modules,
+                $aliases,
+                $dtd_public,
+                $dtd_system
+            );
+        }
+        $this->doctypes[$doctype->name] = $doctype;
+        $name = $doctype->name;
+        // hookup aliases
+        foreach ($doctype->aliases as $alias) {
+            if (isset($this->doctypes[$alias])) {
+                continue;
+            }
+            $this->aliases[$alias] = $name;
+        }
+        // remove old aliases
+        if (isset($this->aliases[$name])) {
+            unset($this->aliases[$name]);
+        }
+        return $doctype;
+    }
+
+    /**
+     * Retrieves reference to a doctype of a certain name
+     * @note This function resolves aliases
+     * @note When possible, use the more fully-featured make()
+     * @param string $doctype Name of doctype
+     * @return HTMLPurifier_Doctype Editable doctype object
+     */
+    public function get($doctype)
+    {
+        if (isset($this->aliases[$doctype])) {
+            $doctype = $this->aliases[$doctype];
+        }
+        if (!isset($this->doctypes[$doctype])) {
+            trigger_error('Doctype ' . htmlspecialchars($doctype) . ' does not exist', E_USER_ERROR);
+            $anon = new HTMLPurifier_Doctype($doctype);
+            return $anon;
+        }
+        return $this->doctypes[$doctype];
+    }
+
+    /**
+     * Creates a doctype based on a configuration object,
+     * will perform initialization on the doctype
+     * @note Use this function to get a copy of doctype that config
+     *       can hold on to (this is necessary in order to tell
+     *       Generator whether or not the current document is XML
+     *       based or not).
+     * @param HTMLPurifier_Config $config
+     * @return HTMLPurifier_Doctype
+     */
+    public function make($config)
+    {
+        return clone $this->get($this->getDoctypeFromConfig($config));
+    }
+
+    /**
+     * Retrieves the doctype from the configuration object
+     * @param HTMLPurifier_Config $config
+     * @return string
+     */
+    public function getDoctypeFromConfig($config)
+    {
+        // recommended test
+        $doctype = $config->get('HTML.Doctype');
+        if (!empty($doctype)) {
+            return $doctype;
+        }
+        $doctype = $config->get('HTML.CustomDoctype');
+        if (!empty($doctype)) {
+            return $doctype;
+        }
+        // backwards-compatibility
+        if ($config->get('HTML.XHTML')) {
+            $doctype = 'XHTML 1.0';
+        } else {
+            $doctype = 'HTML 4.01';
+        }
+        if ($config->get('HTML.Strict')) {
+            $doctype .= ' Strict';
+        } else {
+            $doctype .= ' Transitional';
+        }
+        return $doctype;
+    }
+}
+
+// vim: et sw=4 sts=4
-- 
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