<?php
/**
* Methods to generate XML.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Module of static functions for generating XML
*/
class Xml {
/**
* Format an XML element with given attributes and, optionally, text content.
* Element and attribute names are assumed to be ready for literal inclusion.
* Strings are assumed to not contain XML-illegal characters; special
* characters (<, >, &) are escaped but illegals are not touched.
*
* @param string $element Element name
* @param array $attribs Name=>value pairs. Values will be escaped.
* @param string $contents Null to make an open tag only; '' for a contentless closed tag (default)
* @param bool $allowShortTag Whether '' in $contents will result in a contentless closed tag
* @return string
*/
public static function element( $element, $attribs = null, $contents = '',
$allowShortTag = true
) {
$out = '<' . $element;
if ( !is_null( $attribs ) ) {
$out .= self::expandAttributes( $attribs );
}
if ( is_null( $contents ) ) {
$out .= '>';
} else {
if ( $allowShortTag && $contents === '' ) {
$out .= ' />';
} else {
$out .= '>' . htmlspecialchars( $contents ) . "</$element>";
}
}
return $out;
}
/**
* Given an array of ('attributename' => 'value'), it generates the code
* to set the XML attributes : attributename="value".
* The values are passed to Sanitizer::encodeAttribute.
* Return null if no attributes given.
* @param array $attribs Array of attributes for an XML element
* @throws MWException
* @return null|string
*/
public static function expandAttributes( $attribs ) {
$out = '';
if ( is_null( $attribs ) ) {
return null;
} elseif ( is_array( $attribs ) ) {
foreach ( $attribs as $name => $val ) {
$out .= " {$name}=\"" . Sanitizer::encodeAttribute( $val ) . '"';
}
return $out;
} else {
throw new MWException( 'Expected attribute array, got something else in ' . __METHOD__ );
}
}
/**
* Format an XML element as with self::element(), but run text through the
* $wgContLang->normalize() validator first to ensure that no invalid UTF-8
* is passed.
*
* @param string $element
* @param array $attribs Name=>value pairs. Values will be escaped.
* @param string $contents Null to make an open tag only; '' for a contentless closed tag (default)
* @return string
*/
public static function elementClean( $element, $attribs = array(), $contents = '' ) {
global $wgContLang;
if ( $attribs ) {
$attribs = array_map( array( 'UtfNormal', 'cleanUp' ), $attribs );
}
if ( $contents ) {
$contents = $wgContLang->normalize( $contents );
}
return self::element( $element, $attribs, $contents );
}
/**
* This opens an XML element
*
* @param string $element Name of the element
* @param array $attribs Array of attributes, see Xml::expandAttributes()
* @return string
*/
public static function openElement( $element, $attribs = null ) {
return '<' . $element . self::expandAttributes( $attribs ) . '>';
}
/**
* Shortcut to close an XML element
* @param string $element Element name
* @return string
*/
public static function closeElement( $element ) {
return "</$element>";
}
/**
* Same as Xml::element(), but does not escape contents. Handy when the
* content you have is already valid xml.
*
* @param string $element Element name
* @param array $attribs Array of attributes
* @param string $contents Content of the element
* @return string
*/
public static function tags( $element, $attribs = null, $contents ) {
return self::openElement( $element, $attribs ) . $contents . "</$element>";
}
/**
* Create a date selector
*
* @param string $selected The month which should be selected, default ''.
* @param string $allmonths Value of a special item denoting all month.
* Null to not include (default).
* @param string $id Element identifier
* @return string Html string containing the month selector
*/
public static function monthSelector( $selected = '', $allmonths = null, $id = 'month' ) {
global $wgLang;
$options = array();
$data = new XmlSelect( 'month', $id, $selected );
if ( is_null( $selected ) ) {
$selected = '';
}
if ( !is_null( $allmonths ) ) {
$options[wfMessage( 'monthsall' )->text()] = $allmonths;
}
for ( $i = 1; $i < 13; $i++ ) {
$options[$wgLang->getMonthName( $i )] = $i;
}
$data->addOptions( $options );
$data->setAttribute( 'class', 'mw-month-selector' );
return $data->getHTML();
}
/**
* @param int $year
* @param int $month
* @return string Formatted HTML
*/
public static function dateMenu( $year, $month ) {
# Offset overrides year/month selection
if ( $month && $month !== -1 ) {
$encMonth = intval( $month );
} else {
$encMonth = '';
}
if ( $year ) {
$encYear = intval( $year );
} elseif ( $encMonth ) {
$timestamp = MWTimestamp::getInstance();
$thisMonth = intval( $timestamp->format( 'n' ) );
$thisYear = intval( $timestamp->format( 'Y' ) );
if ( intval( $encMonth ) > $thisMonth ) {
$thisYear--;
}
$encYear = $thisYear;
} else {
$encYear = '';
}
$inputAttribs = array( 'id' => 'year', 'maxlength' => 4, 'size' => 7 );
return self::label( wfMessage( 'year' )->text(), 'year' ) . ' ' .
Html::input( 'year', $encYear, 'number', $inputAttribs ) . ' ' .
self::label( wfMessage( 'month' )->text(), 'month' ) . ' ' .
self::monthSelector( $encMonth, -1 );
}
/**
* Construct a language selector appropriate for use in a form or preferences
*
* @param string $selected The language code of the selected language
* @param bool $customisedOnly If true only languages which have some content are listed
* @param string $inLanguage The ISO code of the language to display the select list in (optional)
* @param array $overrideAttrs Override the attributes of the select tag (since 1.20)
* @param Message|null $msg Label message key (since 1.20)
* @return array Array containing 2 items: label HTML and select list HTML
*/
public static function languageSelector( $selected, $customisedOnly = true,
$inLanguage = null, $overrideAttrs = array(), Message $msg = null
) {
global $wgLanguageCode;
$include = $customisedOnly ? 'mwfile' : 'mw';
$languages = Language::fetchLanguageNames( $inLanguage, $include );
// Make sure the site language is in the list;
// a custom language code might not have a defined name...
if ( !array_key_exists( $wgLanguageCode, $languages ) ) {
$languages[$wgLanguageCode] = $wgLanguageCode;
}
ksort( $languages );
/**
* If a bogus value is set, default to the content language.
* Otherwise, no default is selected and the user ends up
* with Afrikaans since it's first in the list.
*/
$selected = isset( $languages[$selected] ) ? $selected : $wgLanguageCode;
$options = "\n";
foreach ( $languages as $code => $name ) {
$options .= Xml::option( "$code - $name", $code, $code == $selected ) . "\n";
}
$attrs = array( 'id' => 'wpUserLanguage', 'name' => 'wpUserLanguage' );
$attrs = array_merge( $attrs, $overrideAttrs );
if ( $msg === null ) {
$msg = wfMessage( 'yourlanguage' );
}
return array(
Xml::label( $msg->text(), $attrs['id'] ),
Xml::tags( 'select', $attrs, $options )
);
}
/**
* Shortcut to make a span element
* @param string $text Content of the element, will be escaped
* @param string $class Class name of the span element
* @param array $attribs Other attributes
* @return string
*/
public static function span( $text, $class, $attribs = array() ) {
return self::element( 'span', array( 'class' => $class ) + $attribs, $text );
}
/**
* Shortcut to make a specific element with a class attribute
* @param string $text Content of the element, will be escaped
* @param string $class Class name of the span element
* @param string $tag Element name
* @param array $attribs Other attributes
* @return string
*/
public static function wrapClass( $text, $class, $tag = 'span', $attribs = array() ) {
return self::tags( $tag, array( 'class' => $class ) + $attribs, $text );
}
/**
* Convenience function to build an HTML text input field
* @param string $name Value of the name attribute
* @param int $size Value of the size attribute
* @param mixed $value Value of the value attribute
* @param array $attribs Other attributes
* @return string HTML
*/
public static function input( $name, $size = false, $value = false, $attribs = array() ) {
$attributes = array( 'name' => $name );
if ( $size ) {
$attributes['size'] = $size;
}
if ( $value !== false ) { // maybe 0
$attributes['value'] = $value;
}
return self::element( 'input',
Html::getTextInputAttributes( $attributes + $attribs ) );
}
/**
* Convenience function to build an HTML password input field
* @param string $name Value of the name attribute
* @param int $size Value of the size attribute
* @param mixed $value Value of the value attribute
* @param array $attribs Other attributes
* @return string HTML
*/
public static function password( $name, $size = false, $value = false,
$attribs = array()
) {
return self::input( $name, $size, $value,
array_merge( $attribs, array( 'type' => 'password' ) ) );
}
/**
* Internal function for use in checkboxes and radio buttons and such.
*
* @param string $name
* @param bool $present
*
* @return array
*/
public static function attrib( $name, $present = true ) {
return $present ? array( $name => $name ) : array();
}
/**
* Convenience function to build an HTML checkbox
* @param string $name Value of the name attribute
* @param bool $checked Whether the checkbox is checked or not
* @param array $attribs Array other attributes
* @return string HTML
*/
public static function check( $name, $checked = false, $attribs = array() ) {
return self::element( 'input', array_merge(
array(
'name' => $name,
'type' => 'checkbox',
'value' => 1 ),
self::attrib( 'checked', $checked ),
$attribs ) );
}
/**
* Convenience function to build an HTML radio button
* @param string $name Value of the name attribute
* @param string $value Value of the value attribute
* @param bool $checked Whether the checkbox is checked or not
* @param array $attribs Other attributes
* @return string HTML
*/
public static function radio( $name, $value, $checked = false, $attribs = array() ) {
return self::element( 'input', array(
'name' => $name,
'type' => 'radio',
'value' => $value ) + self::attrib( 'checked', $checked ) + $attribs );
}
/**
* Convenience function to build an HTML form label
* @param string $label Text of the label
* @param string $id
* @param array $attribs An attribute array. This will usually be
* the same array as is passed to the corresponding input element,
* so this function will cherry-pick appropriate attributes to
* apply to the label as well; only class and title are applied.
* @return string HTML
*/
public static function label( $label, $id, $attribs = array() ) {
$a = array( 'for' => $id );
foreach ( array( 'class', 'title' ) as $attr ) {
if ( isset( $attribs[$attr] ) ) {
$a[$attr] = $attribs[$attr];
}
}
return self::element( 'label', $a, $label );
}
/**
* Convenience function to build an HTML text input field with a label
* @param string $label Text of the label
* @param string $name Value of the name attribute
* @param string $id Id of the input
* @param int|bool $size Value of the size attribute
* @param string|bool $value Value of the value attribute
* @param array $attribs Other attributes
* @return string HTML
*/
public static function inputLabel( $label, $name, $id, $size = false,
$value = false, $attribs = array()
) {
list( $label, $input ) = self::inputLabelSep( $label, $name, $id, $size, $value, $attribs );
return $label . ' ' . $input;
}
/**
* Same as Xml::inputLabel() but return input and label in an array
*
* @param string $label
* @param string $name
* @param string $id
* @param int|bool $size
* @param string|bool $value
* @param array $attribs
*
* @return array
*/
public static function inputLabelSep( $label, $name, $id, $size = false,
$value = false, $attribs = array()
) {
return array(
Xml::label( $label, $id, $attribs ),
self::input( $name, $size, $value, array( 'id' => $id ) + $attribs )
);
}
/**
* Convenience function to build an HTML checkbox with a label
*
* @param string $label
* @param string $name
* @param string $id
* @param bool $checked
* @param array $attribs
*
* @return string HTML
*/
public static function checkLabel( $label, $name, $id, $checked = false, $attribs = array() ) {
global $wgUseMediaWikiUIEverywhere;
$chkLabel = self::check( $name, $checked, array( 'id' => $id ) + $attribs ) .
' ' .
self::label( $label, $id, $attribs );
if ( $wgUseMediaWikiUIEverywhere ) {
$chkLabel = self::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
$chkLabel . self::closeElement( 'div' );
}
return $chkLabel;
}
/**
* Convenience function to build an HTML radio button with a label
*
* @param string $label
* @param string $name
* @param string $value
* @param string $id
* @param bool $checked
* @param array $attribs
*
* @return string HTML
*/
public static function radioLabel( $label, $name, $value, $id,
$checked = false, $attribs = array()
) {
return self::radio( $name, $value, $checked, array( 'id' => $id ) + $attribs ) .
' ' .
self::label( $label, $id, $attribs );
}
/**
* Convenience function to build an HTML submit button
* When $wgUseMediaWikiUIEverywhere is true it will default to a constructive button
* @param string $value Label text for the button
* @param array $attribs Optional custom attributes
* @return string HTML
*/
public static function submitButton( $value, $attribs = array() ) {
global $wgUseMediaWikiUIEverywhere;
$baseAttrs = array(
'type' => 'submit',
'value' => $value,
);
// Done conditionally for time being as it is possible
// some submit forms
// might need to be mw-ui-destructive (e.g. delete a page)
if ( $wgUseMediaWikiUIEverywhere ) {
$baseAttrs['class'] = 'mw-ui-button mw-ui-constructive';
}
// Any custom attributes will take precendence of anything in baseAttrs e.g. override the class
$attribs = $attribs + $baseAttrs;
return Html::element( 'input', $attribs );
}
/**
* Convenience function to build an HTML drop-down list item.
* @param string $text Text for this item. Will be HTML escaped
* @param string $value Form submission value; if empty, use text
* @param bool $selected If true, will be the default selected item
* @param array $attribs Optional additional HTML attributes
* @return string HTML
*/
public static function option( $text, $value = null, $selected = false,
$attribs = array() ) {
if ( !is_null( $value ) ) {
$attribs['value'] = $value;
}
if ( $selected ) {
$attribs['selected'] = 'selected';
}
return Html::element( 'option', $attribs, $text );
}
/**
* Build a drop-down box from a textual list.
*
* @param string $name Name and id for the drop-down
* @param string $list Correctly formatted text (newline delimited) to be
* used to generate the options.
* @param string $other Text for the "Other reasons" option
* @param string $selected Option which should be pre-selected
* @param string $class CSS classes for the drop-down
* @param int $tabindex Value of the tabindex attribute
* @return string
*/
public static function listDropDown( $name = '', $list = '', $other = '',
$selected = '', $class = '', $tabindex = null
) {
$optgroup = false;
$options = self::option( $other, 'other', $selected === 'other' );
foreach ( explode( "\n", $list ) as $option ) {
$value = trim( $option );
if ( $value == '' ) {
continue;
} elseif ( substr( $value, 0, 1 ) == '*' && substr( $value, 1, 1 ) != '*' ) {
// A new group is starting ...
$value = trim( substr( $value, 1 ) );
if ( $optgroup ) {
$options .= self::closeElement( 'optgroup' );
}
$options .= self::openElement( 'optgroup', array( 'label' => $value ) );
$optgroup = true;
} elseif ( substr( $value, 0, 2 ) == '**' ) {
// groupmember
$value = trim( substr( $value, 2 ) );
$options .= self::option( $value, $value, $selected === $value );
} else {
// groupless reason list
if ( $optgroup ) {
$options .= self::closeElement( 'optgroup' );
}
$options .= self::option( $value, $value, $selected === $value );
$optgroup = false;
}
}
if ( $optgroup ) {
$options .= self::closeElement( 'optgroup' );
}
$attribs = array();
if ( $name ) {
$attribs['id'] = $name;
$attribs['name'] = $name;
}
if ( $class ) {
$attribs['class'] = $class;
}
if ( $tabindex ) {
$attribs['tabindex'] = $tabindex;
}
return Xml::openElement( 'select', $attribs )
. "\n"
. $options
. "\n"
. Xml::closeElement( 'select' );
}
/**
* Shortcut for creating fieldsets.
*
* @param string|bool $legend Legend of the fieldset. If evaluates to false,
* legend is not added.
* @param string $content Pre-escaped content for the fieldset. If false,
* only open fieldset is returned.
* @param array $attribs Any attributes to fieldset-element.
*
* @return string
*/
public static function fieldset( $legend = false, $content = false, $attribs = array() ) {
$s = Xml::openElement( 'fieldset', $attribs ) . "\n";
if ( $legend ) {
$s .= Xml::element( 'legend', null, $legend ) . "\n";
}
if ( $content !== false ) {
$s .= $content . "\n";
$s .= Xml::closeElement( 'fieldset' ) . "\n";
}
return $s;
}
/**
* Shortcut for creating textareas.
*
* @param string $name The 'name' for the textarea
* @param string $content Content for the textarea
* @param int $cols The number of columns for the textarea
* @param int $rows The number of rows for the textarea
* @param array $attribs Any other attributes for the textarea
*
* @return string
*/
public static function textarea( $name, $content, $cols = 40, $rows = 5, $attribs = array() ) {
return self::element( 'textarea',
Html::getTextInputAttributes(
array(
'name' => $name,
'id' => $name,
'cols' => $cols,
'rows' => $rows
) + $attribs
),
$content, false );
}
/**
* Returns an escaped string suitable for inclusion in a string literal
* for JavaScript source code.
* Illegal control characters are assumed not to be present.
*
* @deprecated since 1.21; use Xml::encodeJsVar() or Xml::encodeJsCall() instead
* @param string $string String to escape
* @return string
*/
public static function escapeJsString( $string ) {
// See ECMA 262 section 7.8.4 for string literal format
$pairs = array(
"\\" => "\\\\",
"\"" => "\\\"",
'\'' => '\\\'',
"\n" => "\\n",
"\r" => "\\r",
# To avoid closing the element or CDATA section
"<" => "\\x3c",
">" => "\\x3e",
# To avoid any complaints about bad entity refs
"&" => "\\x26",
# Work around https://bugzilla.mozilla.org/show_bug.cgi?id=274152
# Encode certain Unicode formatting chars so affected
# versions of Gecko don't misinterpret our strings;
# this is a common problem with Farsi text.
"\xe2\x80\x8c" => "\\u200c", // ZERO WIDTH NON-JOINER
"\xe2\x80\x8d" => "\\u200d", // ZERO WIDTH JOINER
);
return strtr( $string, $pairs );
}
/**
* Encode a variable of arbitrary type to JavaScript.
* If the value is an XmlJsCode object, pass through the object's value verbatim.
*
* @note Only use this function for generating JavaScript code. If generating output
* for a proper JSON parser, just call FormatJson::encode() directly.
*
* @param mixed $value The value being encoded. Can be any type except a resource.
* @param bool $pretty If true, add non-significant whitespace to improve readability.
* @return string|bool String if successful; false upon failure
*/
public static function encodeJsVar( $value, $pretty = false ) {
if ( $value instanceof XmlJsCode ) {
return $value->value;
}
return FormatJson::encode( $value, $pretty, FormatJson::UTF8_OK );
}
/**
* Create a call to a JavaScript function. The supplied arguments will be
* encoded using Xml::encodeJsVar().
*
* @since 1.17
* @param string $name The name of the function to call, or a JavaScript expression
* which evaluates to a function object which is called.
* @param array $args The arguments to pass to the function.
* @param bool $pretty If true, add non-significant whitespace to improve readability.
* @return string|bool String if successful; false upon failure
*/
public static function encodeJsCall( $name, $args, $pretty = false ) {
foreach ( $args as &$arg ) {
$arg = Xml::encodeJsVar( $arg, $pretty );
if ( $arg === false ) {
return false;
}
}
return "$name(" . ( $pretty
? ( ' ' . implode( ', ', $args ) . ' ' )
: implode( ',', $args )
) . ");";
}
/**
* Check if a string is well-formed XML.
* Must include the surrounding tag.
* This function is a DoS vector if an attacker can define
* entities in $text.
*
* @param string $text String to test.
* @return bool
*
* @todo Error position reporting return
*/
private static function isWellFormed( $text ) {
$parser = xml_parser_create( "UTF-8" );
# case folding violates XML standard, turn it off
xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
if ( !xml_parse( $parser, $text, true ) ) {
//$err = xml_error_string( xml_get_error_code( $parser ) );
//$position = xml_get_current_byte_index( $parser );
//$fragment = $this->extractFragment( $html, $position );
//$this->mXmlError = "$err at byte $position:\n$fragment";
xml_parser_free( $parser );
return false;
}
xml_parser_free( $parser );
return true;
}
/**
* Check if a string is a well-formed XML fragment.
* Wraps fragment in an \<html\> bit and doctype, so it can be a fragment
* and can use HTML named entities.
*
* @param string $text
* @return bool
*/
public static function isWellFormedXmlFragment( $text ) {
$html =
Sanitizer::hackDocType() .
'<html>' .
$text .
'</html>';
return Xml::isWellFormed( $html );
}
/**
* Replace " > and < with their respective HTML entities ( ",
* >, <)
*
* @param string $in Text that might contain HTML tags.
* @return string Escaped string
*/
public static function escapeTagsOnly( $in ) {
return str_replace(
array( '"', '>', '<' ),
array( '"', '>', '<' ),
$in );
}
/**
* Generate a form (without the opening form element).
* Output optionally includes a submit button.
* @param array $fields Associative array, key is the name of a message that
* contains a description for the field, value is an HTML string
* containing the appropriate input.
* @param string $submitLabel The name of a message containing a label for
* the submit button.
* @param array $submitAttribs The attributes to add to the submit button
* @return string HTML form.
*/
public static function buildForm( $fields, $submitLabel = null, $submitAttribs = array() ) {
$form = '';
$form .= "<table><tbody>";
foreach ( $fields as $labelmsg => $input ) {
$id = "mw-$labelmsg";
$form .= Xml::openElement( 'tr', array( 'id' => $id ) );
// TODO use a <label> here for accessibility purposes - will need
// to either not use a table to build the form, or find the ID of
// the input somehow.
$form .= Xml::tags( 'td', array( 'class' => 'mw-label' ), wfMessage( $labelmsg )->parse() );
$form .= Xml::openElement( 'td', array( 'class' => 'mw-input' ) )
. $input . Xml::closeElement( 'td' );
$form .= Xml::closeElement( 'tr' );
}
if ( $submitLabel ) {
$form .= Xml::openElement( 'tr' );
$form .= Xml::tags( 'td', array(), '' );
$form .= Xml::openElement( 'td', array( 'class' => 'mw-submit' ) )
. Xml::submitButton( wfMessage( $submitLabel )->text(), $submitAttribs )
. Xml::closeElement( 'td' );
$form .= Xml::closeElement( 'tr' );
}
$form .= "</tbody></table>";
return $form;
}
/**
* Build a table of data
* @param array $rows An array of arrays of strings, each to be a row in a table
* @param array $attribs An array of attributes to apply to the table tag [optional]
* @param array $headers An array of strings to use as table headers [optional]
* @return string
*/
public static function buildTable( $rows, $attribs = array(), $headers = null ) {
$s = Xml::openElement( 'table', $attribs );
if ( is_array( $headers ) ) {
$s .= Xml::openElement( 'thead', $attribs );
foreach ( $headers as $id => $header ) {
$attribs = array();
if ( is_string( $id ) ) {
$attribs['id'] = $id;
}
$s .= Xml::element( 'th', $attribs, $header );
}
$s .= Xml::closeElement( 'thead' );
}
foreach ( $rows as $id => $row ) {
$attribs = array();
if ( is_string( $id ) ) {
$attribs['id'] = $id;
}
$s .= Xml::buildTableRow( $attribs, $row );
}
$s .= Xml::closeElement( 'table' );
return $s;
}
/**
* Build a row for a table
* @param array $attribs An array of attributes to apply to the tr tag
* @param array $cells An array of strings to put in <td>
* @return string
*/
public static function buildTableRow( $attribs, $cells ) {
$s = Xml::openElement( 'tr', $attribs );
foreach ( $cells as $id => $cell ) {
$attribs = array();
if ( is_string( $id ) ) {
$attribs['id'] = $id;
}
$s .= Xml::element( 'td', $attribs, $cell );
}
$s .= Xml::closeElement( 'tr' );
return $s;
}
}
/**
* A wrapper class which causes Xml::encodeJsVar() and Xml::encodeJsCall() to
* interpret a given string as being a JavaScript expression, instead of string
* data.
*
* Example:
*
* Xml::encodeJsVar( new XmlJsCode( 'a + b' ) );
*
* Returns "a + b".
*
* @note As of 1.21, XmlJsCode objects cannot be nested inside objects or arrays. The sole
* exception is the $args argument to Xml::encodeJsCall() because Xml::encodeJsVar() is
* called for each individual element in that array.
*
* @since 1.17
*/
class XmlJsCode {
public $value;
function __construct( $value ) {
$this->value = $value;
}
}