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Code Issues Releases Wiki Activity

Implement center, menu and dir tag transformations. Font transform pending.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@140 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
2006-08-02 02:24:03 +00:00
parent d243545142
commit 626cfc1172
6 changed files with 220 additions and 1 deletions
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9
library/HTMLPurifier/Definition.php
View File

@@ -6,6 +6,7 @@ require_once 'HTMLPurifier/AttrDef.php';
require_once 'HTMLPurifier/ChildDef.php';
require_once 'HTMLPurifier/Generator.php';
require_once 'HTMLPurifier/Token.php';
require_once 'HTMLPurifier/TagTransform.php';
/**
* Defines the purified HTML type with large amounts of objects.
@@ -39,6 +40,9 @@ class HTMLPurifier_Definition
// used solely by HTMLPurifier_Strategy_FixNesting
var $info_parent = 'div';
// used solely by HTMLPurifier_Strategy_RemoveForeignElements
var $info_tag_transform = array();
function instance() {
static $instance = null;
if (!$instance) {
@@ -212,6 +216,11 @@ class HTMLPurifier_Definition
// dir -> ul
// center -> div / css: text-align: center;
//$this->info_tag_transform['font'] = new HTMLPurifier_TagTransform_Font();
$this->info_tag_transform['menu'] = new HTMLPurifier_TagTransform_Simple('ul');
$this->info_tag_transform['dir'] = new HTMLPurifier_TagTransform_Simple('ul');
$this->info_tag_transform['center'] = new HTMLPurifier_TagTransform_Center();
//////////////////////////////////////////////////////////////////////
// info[]->auto_close : tags that automatically close another

14
library/HTMLPurifier/Strategy/RemoveForeignElements.php
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@@ -3,6 +3,7 @@
require_once 'HTMLPurifier/Strategy.php';
require_once 'HTMLPurifier/Definition.php';
require_once 'HTMLPurifier/Generator.php';
require_once 'HTMLPurifier/TagTransform.php';
/**
* Removes all unrecognized tags from the list of tokens.
@@ -27,7 +28,18 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
foreach($tokens as $token) {
if (!empty( $token->is_tag )) {
// DEFINITION CALL
if (!isset($this->definition->info[$token->name])) {
if (isset($this->definition->info[$token->name])) {
// leave untouched
} elseif (
isset($this->definition->info_tag_transform[$token->name])
) {
// there is a transformation for this tag
// DEFINITION CALL
$token = $this->
definition->
info_tag_transform[$token->name]->
transform($token);
} else {
// invalid tag, generate HTML and insert in
$token = new HTMLPurifier_Token_Text(
$this->generator->generateFromToken($token)

88
library/HTMLPurifier/TagTransform.php Normal file
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@@ -0,0 +1,88 @@
<?php
require_once('HTMLPurifier/Token.php');
class HTMLPurifier_TagTransform
{
function transform($tag) {
trigger_error('Call to abstract function', E_USER_ERROR);
}
function normalizeAttributes($attributes) {
$keys = array_keys($attributes);
foreach ($keys as $key) {
// normalization only necessary when key is not lowercase
if (!ctype_lower($key)) {
$new_key = strtolower($key);
if (!isset($attributes[$new_key])) {
$attributes[$new_key] = $attributes[$key];
}
unset($attributes[$key]);
}
}
return $attributes;
}
}
class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
{
var $transform_to;
function HTMLPurifier_TagTransform_Simple($transform_to) {
$this->transform_to = $transform_to;
}
function transform($tag) {
switch ($tag->type) {
case 'end':
$new_tag = new HTMLPurifier_Token_End($this->transform_to);
break;
case 'start':
$new_tag = new HTMLPurifier_Token_Start($this->transform_to,
$tag->attributes);
break;
case 'empty':
$new_tag = new HTMLPurifier_Token_Empty($this->transform_to,
$tag->attributes);
break;
default:
trigger_error('Failed tag transformation', E_USER_WARNING);
return;
}
return $new_tag;
}
}
class HTMLPurifier_TagTransform_Center extends HTMLPurifier_TagTransform
{
function transform($tag) {
$attributes = $this->normalizeAttributes($tag->attributes);
$prepend_css = 'text-align:center;';
if (isset($attributes['style'])) {
$attributes['style'] = $prepend_css . $attributes['style'];
} else {
$attributes['style'] = $prepend_css;
}
switch ($tag->type) {
case 'end':
$new_tag = new HTMLPurifier_Token_End('div');
break;
case 'start':
$new_tag = new HTMLPurifier_Token_Start('div', $attributes);
break;
case 'empty':
$new_tag = new HTMLPurifier_Token_Empty('div', $attributes);
break;
default:
trigger_error('Failed tag transformation', E_USER_WARNING);
return;
}
return $new_tag;
}
}
?>