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mediawiki_ynh/sources/mediawiki/includes/Html.php

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<?php
/**
* Collection of methods to generate HTML content
*
* Copyright © 2009 Aryeh Gregor
* http://www.mediawiki.org/
*
* 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
*/
/**
* This class is a collection of static functions that serve two purposes:
*
* 1) Implement any algorithms specified by HTML5, or other HTML
* specifications, in a convenient and self-contained way.
*
* 2) Allow HTML elements to be conveniently and safely generated, like the
* current Xml class but a) less confused (Xml supports HTML-specific things,
* but only sometimes!) and b) not necessarily confined to XML-compatible
* output.
*
* There are two important configuration options this class uses:
*
* $wgMimeType: If this is set to an xml mimetype then output should be
* valid XHTML5.
* $wgWellFormedXml: If this is set to true, then all output should be
* well-formed XML (quotes on attributes, self-closing tags, etc.).
*
* This class is meant to be confined to utility functions that are called from
* trusted code paths. It does not do enforcement of policy like not allowing
* <a> elements.
*
* @since 1.16
*/
class Html {
// List of void elements from HTML5, section 8.1.2 as of 2011-08-12
private static $voidElements = array(
'area',
'base',
'br',
'col',
'command',
'embed',
'hr',
'img',
'input',
'keygen',
'link',
'meta',
'param',
'source',
'track',
'wbr',
);
// Boolean attributes, which may have the value omitted entirely. Manually
// collected from the HTML5 spec as of 2011-08-12.
private static $boolAttribs = array(
'async',
'autofocus',
'autoplay',
'checked',
'controls',
'default',
'defer',
'disabled',
'formnovalidate',
'hidden',
'ismap',
'itemscope',
'loop',
'multiple',
'muted',
'novalidate',
'open',
'pubdate',
'readonly',
'required',
'reversed',
'scoped',
'seamless',
'selected',
'truespeed',
'typemustmatch',
// HTML5 Microdata
'itemscope',
);
/**
* Returns an HTML element in a string. The major advantage here over
* manually typing out the HTML is that it will escape all attribute
* values. If you're hardcoding all the attributes, or there are none, you
* should probably just type out the html element yourself.
*
* This is quite similar to Xml::tags(), but it implements some useful
* HTML-specific logic. For instance, there is no $allowShortTag
* parameter: the closing tag is magically omitted if $element has an empty
* content model. If $wgWellFormedXml is false, then a few bytes will be
* shaved off the HTML output as well.
*
* @param string $element The element's name, e.g., 'a'
* @param array $attribs Associative array of attributes, e.g., array(
* 'href' => 'http://www.mediawiki.org/' ). See expandAttributes() for
* further documentation.
* @param string $contents The raw HTML contents of the element: *not*
* escaped!
* @return string Raw HTML
*/
public static function rawElement( $element, $attribs = array(), $contents = '' ) {
global $wgWellFormedXml;
$start = self::openElement( $element, $attribs );
if ( in_array( $element, self::$voidElements ) ) {
if ( $wgWellFormedXml ) {
// Silly XML.
return substr( $start, 0, -1 ) . ' />';
}
return $start;
} else {
return "$start$contents" . self::closeElement( $element );
}
}
/**
* Identical to rawElement(), but HTML-escapes $contents (like
* Xml::element()).
*
* @param $element string
* @param $attribs array
* @param $contents string
*
* @return string
*/
public static function element( $element, $attribs = array(), $contents = '' ) {
return self::rawElement( $element, $attribs, strtr( $contents, array(
// There's no point in escaping quotes, >, etc. in the contents of
// elements.
'&' => '&amp;',
'<' => '&lt;'
) ) );
}
/**
* Identical to rawElement(), but has no third parameter and omits the end
* tag (and the self-closing '/' in XML mode for empty elements).
*
* @param $element string
* @param $attribs array
*
* @return string
*/
public static function openElement( $element, $attribs = array() ) {
global $wgWellFormedXml;
$attribs = (array)$attribs;
// This is not required in HTML5, but let's do it anyway, for
// consistency and better compression.
$element = strtolower( $element );
// In text/html, initial <html> and <head> tags can be omitted under
// pretty much any sane circumstances, if they have no attributes. See:
// <http://www.whatwg.org/html/syntax.html#optional-tags>
if ( !$wgWellFormedXml && !$attribs
&& in_array( $element, array( 'html', 'head' ) ) ) {
return '';
}
// Remove invalid input types
if ( $element == 'input' ) {
$validTypes = array(
'hidden',
'text',
'password',
'checkbox',
'radio',
'file',
'submit',
'image',
'reset',
'button',
// HTML input types
'datetime',
'datetime-local',
'date',
'month',
'time',
'week',
'number',
'range',
'email',
'url',
'search',
'tel',
'color',
);
if ( isset( $attribs['type'] )
&& !in_array( $attribs['type'], $validTypes ) ) {
unset( $attribs['type'] );
}
}
// According to standard the default type for <button> elements is "submit".
// Depending on compatibility mode IE might use "button", instead.
// We enforce the standard "submit".
if ( $element == 'button' && !isset( $attribs['type'] ) ) {
$attribs['type'] = 'submit';
}
return "<$element" . self::expandAttributes(
self::dropDefaults( $element, $attribs ) ) . '>';
}
/**
* Returns "</$element>", except if $wgWellFormedXml is off, in which case
* it returns the empty string when that's guaranteed to be safe.
*
* @since 1.17
* @param string $element Name of the element, e.g., 'a'
* @return string A closing tag, if required
*/
public static function closeElement( $element ) {
global $wgWellFormedXml;
$element = strtolower( $element );
// Reference:
// http://www.whatwg.org/html/syntax.html#optional-tags
if ( !$wgWellFormedXml && in_array( $element, array(
'html',
'head',
'body',
'li',
'dt',
'dd',
'tr',
'td',
'th',
) ) ) {
return '';
}
return "</$element>";
}
/**
* Given an element name and an associative array of element attributes,
* return an array that is functionally identical to the input array, but
* possibly smaller. In particular, attributes might be stripped if they
* are given their default values.
*
* This method is not guaranteed to remove all redundant attributes, only
* some common ones and some others selected arbitrarily at random. It
* only guarantees that the output array should be functionally identical
* to the input array (currently per the HTML 5 draft as of 2009-09-06).
*
* @param string $element Name of the element, e.g., 'a'
* @param array $attribs Associative array of attributes, e.g., array(
* 'href' => 'http://www.mediawiki.org/' ). See expandAttributes() for
* further documentation.
* @return array An array of attributes functionally identical to $attribs
*/
private static function dropDefaults( $element, $attribs ) {
// Whenever altering this array, please provide a covering test case
// in HtmlTest::provideElementsWithAttributesHavingDefaultValues
static $attribDefaults = array(
'area' => array( 'shape' => 'rect' ),
'button' => array(
'formaction' => 'GET',
'formenctype' => 'application/x-www-form-urlencoded',
),
'canvas' => array(
'height' => '150',
'width' => '300',
),
'command' => array( 'type' => 'command' ),
'form' => array(
'action' => 'GET',
'autocomplete' => 'on',
'enctype' => 'application/x-www-form-urlencoded',
),
'input' => array(
'formaction' => 'GET',
'type' => 'text',
),
'keygen' => array( 'keytype' => 'rsa' ),
'link' => array( 'media' => 'all' ),
'menu' => array( 'type' => 'list' ),
// Note: the use of text/javascript here instead of other JavaScript
// MIME types follows the HTML5 spec.
'script' => array( 'type' => 'text/javascript' ),
'style' => array(
'media' => 'all',
'type' => 'text/css',
),
'textarea' => array( 'wrap' => 'soft' ),
);
$element = strtolower( $element );
foreach ( $attribs as $attrib => $value ) {
$lcattrib = strtolower( $attrib );
if ( is_array( $value ) ) {
$value = implode( ' ', $value );
} else {
$value = strval( $value );
}
// Simple checks using $attribDefaults
if ( isset( $attribDefaults[$element][$lcattrib] ) &&
$attribDefaults[$element][$lcattrib] == $value ) {
unset( $attribs[$attrib] );
}
if ( $lcattrib == 'class' && $value == '' ) {
unset( $attribs[$attrib] );
}
}
// More subtle checks
if ( $element === 'link' && isset( $attribs['type'] )
&& strval( $attribs['type'] ) == 'text/css' ) {
unset( $attribs['type'] );
}
if ( $element === 'input' ) {
$type = isset( $attribs['type'] ) ? $attribs['type'] : null;
$value = isset( $attribs['value'] ) ? $attribs['value'] : null;
if ( $type === 'checkbox' || $type === 'radio' ) {
// The default value for checkboxes and radio buttons is 'on'
// not ''. By stripping value="" we break radio boxes that
// actually wants empty values.
if ( $value === 'on' ) {
unset( $attribs['value'] );
}
} elseif ( $type === 'submit' ) {
// The default value for submit appears to be "Submit" but
// let's not bother stripping out localized text that matches
// that.
} else {
// The default value for nearly every other field type is ''
// The 'range' and 'color' types use different defaults but
// stripping a value="" does not hurt them.
if ( $value === '' ) {
unset( $attribs['value'] );
}
}
}
if ( $element === 'select' && isset( $attribs['size'] ) ) {
if ( in_array( 'multiple', $attribs )
|| ( isset( $attribs['multiple'] ) && $attribs['multiple'] !== false )
) {
// A multi-select
if ( strval( $attribs['size'] ) == '4' ) {
unset( $attribs['size'] );
}
} else {
// Single select
if ( strval( $attribs['size'] ) == '1' ) {
unset( $attribs['size'] );
}
}
}
return $attribs;
}
/**
* Given an associative array of element attributes, generate a string
* to stick after the element name in HTML output. Like array( 'href' =>
* 'http://www.mediawiki.org/' ) becomes something like
* ' href="http://www.mediawiki.org"'. Again, this is like
* Xml::expandAttributes(), but it implements some HTML-specific logic.
* For instance, it will omit quotation marks if $wgWellFormedXml is false,
* and will treat boolean attributes specially.
*
* Attributes that should contain space-separated lists (such as 'class') array
* values are allowed as well, which will automagically be normalized
* and converted to a space-separated string. In addition to a numerical
* array, the attribute value may also be an associative array. See the
* example below for how that works.
*
* @par Numerical array
* @code
* Html::element( 'em', array(
* 'class' => array( 'foo', 'bar' )
* ) );
* // gives '<em class="foo bar"></em>'
* @endcode
*
* @par Associative array
* @code
* Html::element( 'em', array(
* 'class' => array( 'foo', 'bar', 'foo' => false, 'quux' => true )
* ) );
* // gives '<em class="bar quux"></em>'
* @endcode
*
* @param array $attribs Associative array of attributes, e.g., array(
* 'href' => 'http://www.mediawiki.org/' ). Values will be HTML-escaped.
* A value of false means to omit the attribute. For boolean attributes,
* you can omit the key, e.g., array( 'checked' ) instead of
* array( 'checked' => 'checked' ) or such.
* @return string HTML fragment that goes between element name and '>'
* (starting with a space if at least one attribute is output)
*/
public static function expandAttributes( $attribs ) {
global $wgWellFormedXml;
$ret = '';
$attribs = (array)$attribs;
foreach ( $attribs as $key => $value ) {
// Support intuitive array( 'checked' => true/false ) form
if ( $value === false || is_null( $value ) ) {
continue;
}
// For boolean attributes, support array( 'foo' ) instead of
// requiring array( 'foo' => 'meaningless' ).
if ( is_int( $key )
&& in_array( strtolower( $value ), self::$boolAttribs ) ) {
$key = $value;
}
// Not technically required in HTML5 but we'd like consistency
// and better compression anyway.
$key = strtolower( $key );
// Bug 23769: Blacklist all form validation attributes for now. Current
// (June 2010) WebKit has no UI, so the form just refuses to submit
// without telling the user why, which is much worse than failing
// server-side validation. Opera is the only other implementation at
// this time, and has ugly UI, so just kill the feature entirely until
// we have at least one good implementation.
// As the default value of "1" for "step" rejects decimal
// numbers to be entered in 'type="number"' fields, allow
// the special case 'step="any"'.
if ( in_array( $key, array( 'max', 'min', 'pattern', 'required' ) ) ||
$key === 'step' && $value !== 'any' ) {
continue;
}
// http://www.w3.org/TR/html401/index/attributes.html ("space-separated")
// http://www.w3.org/TR/html5/index.html#attributes-1 ("space-separated")
$spaceSeparatedListAttributes = array(
'class', // html4, html5
'accesskey', // as of html5, multiple space-separated values allowed
// html4-spec doesn't document rel= as space-separated
// but has been used like that and is now documented as such
// in the html5-spec.
'rel',
);
// Specific features for attributes that allow a list of space-separated values
if ( in_array( $key, $spaceSeparatedListAttributes ) ) {
// Apply some normalization and remove duplicates
// Convert into correct array. Array can contain space-separated
// values. Implode/explode to get those into the main array as well.
if ( is_array( $value ) ) {
// If input wasn't an array, we can skip this step
$newValue = array();
foreach ( $value as $k => $v ) {
if ( is_string( $v ) ) {
// String values should be normal `array( 'foo' )`
// Just append them
if ( !isset( $value[$v] ) ) {
// As a special case don't set 'foo' if a
// separate 'foo' => true/false exists in the array
// keys should be authoritative
$newValue[] = $v;
}
} elseif ( $v ) {
// If the value is truthy but not a string this is likely
// an array( 'foo' => true ), falsy values don't add strings
$newValue[] = $k;
}
}
$value = implode( ' ', $newValue );
}
$value = explode( ' ', $value );
// Normalize spacing by fixing up cases where people used
// more than 1 space and/or a trailing/leading space
$value = array_diff( $value, array( '', ' ' ) );
// Remove duplicates and create the string
$value = implode( ' ', array_unique( $value ) );
}
// See the "Attributes" section in the HTML syntax part of HTML5,
// 9.1.2.3 as of 2009-08-10. Most attributes can have quotation
// marks omitted, but not all. (Although a literal " is not
// permitted, we don't check for that, since it will be escaped
// anyway.)
#
// See also research done on further characters that need to be
// escaped: http://code.google.com/p/html5lib/issues/detail?id=93
$badChars = "\\x00- '=<>`/\x{00a0}\x{1680}\x{180e}\x{180F}\x{2000}\x{2001}"
. "\x{2002}\x{2003}\x{2004}\x{2005}\x{2006}\x{2007}\x{2008}\x{2009}"
. "\x{200A}\x{2028}\x{2029}\x{202F}\x{205F}\x{3000}";
if ( $wgWellFormedXml || $value === ''
|| preg_match( "![$badChars]!u", $value ) ) {
$quote = '"';
} else {
$quote = '';
}
if ( in_array( $key, self::$boolAttribs ) ) {
// In HTML5, we can leave the value empty. If we don't need
// well-formed XML, we can omit the = entirely.
if ( !$wgWellFormedXml ) {
$ret .= " $key";
} else {
$ret .= " $key=\"\"";
}
} else {
// Apparently we need to entity-encode \n, \r, \t, although the
// spec doesn't mention that. Since we're doing strtr() anyway,
// and we don't need <> escaped here, we may as well not call
// htmlspecialchars().
// @todo FIXME: Verify that we actually need to
// escape \n\r\t here, and explain why, exactly.
#
// We could call Sanitizer::encodeAttribute() for this, but we
// don't because we're stubborn and like our marginal savings on
// byte size from not having to encode unnecessary quotes.
$map = array(
'&' => '&amp;',
'"' => '&quot;',
"\n" => '&#10;',
"\r" => '&#13;',
"\t" => '&#9;'
);
if ( $wgWellFormedXml ) {
// This is allowed per spec: <http://www.w3.org/TR/xml/#NT-AttValue>
// But reportedly it breaks some XML tools?
// @todo FIXME: Is this really true?
$map['<'] = '&lt;';
}
$ret .= " $key=$quote" . strtr( $value, $map ) . $quote;
}
}
return $ret;
}
/**
* Output a "<script>" tag with the given contents.
*
* @todo do some useful escaping as well, like if $contents contains
* literal "</script>" or (for XML) literal "]]>".
*
* @param string $contents JavaScript
* @return string Raw HTML
*/
public static function inlineScript( $contents ) {
global $wgWellFormedXml;
$attrs = array();
if ( $wgWellFormedXml && preg_match( '/[<&]/', $contents ) ) {
$contents = "/*<![CDATA[*/$contents/*]]>*/";
}
return self::rawElement( 'script', $attrs, $contents );
}
/**
* Output a "<script>" tag linking to the given URL, e.g.,
* "<script src=foo.js></script>".
*
* @param $url string
* @return string Raw HTML
*/
public static function linkedScript( $url ) {
$attrs = array( 'src' => $url );
return self::element( 'script', $attrs );
}
/**
* Output a "<style>" tag with the given contents for the given media type
* (if any). TODO: do some useful escaping as well, like if $contents
* contains literal "</style>" (admittedly unlikely).
*
* @param string $contents CSS
* @param $media mixed A media type string, like 'screen'
* @return string Raw HTML
*/
public static function inlineStyle( $contents, $media = 'all' ) {
global $wgWellFormedXml;
if ( $wgWellFormedXml && preg_match( '/[<&]/', $contents ) ) {
$contents = "/*<![CDATA[*/$contents/*]]>*/";
}
return self::rawElement( 'style', array(
'type' => 'text/css',
'media' => $media,
), $contents );
}
/**
* Output a "<link rel=stylesheet>" linking to the given URL for the given
* media type (if any).
*
* @param $url string
* @param $media mixed A media type string, like 'screen'
* @return string Raw HTML
*/
public static function linkedStyle( $url, $media = 'all' ) {
return self::element( 'link', array(
'rel' => 'stylesheet',
'href' => $url,
'type' => 'text/css',
'media' => $media,
) );
}
/**
* Convenience function to produce an "<input>" element. This supports the
* new HTML5 input types and attributes.
*
* @param $name string name attribute
* @param $value mixed value attribute
* @param $type string type attribute
* @param array $attribs Associative array of miscellaneous extra
* attributes, passed to Html::element()
* @return string Raw HTML
*/
public static function input( $name, $value = '', $type = 'text', $attribs = array() ) {
$attribs['type'] = $type;
$attribs['value'] = $value;
$attribs['name'] = $name;
return self::element( 'input', $attribs );
}
/**
* Convenience function to produce an input element with type=hidden
*
* @param $name string name attribute
* @param $value string value attribute
* @param array $attribs Associative array of miscellaneous extra
* attributes, passed to Html::element()
* @return string Raw HTML
*/
public static function hidden( $name, $value, $attribs = array() ) {
return self::input( $name, $value, 'hidden', $attribs );
}
/**
* Convenience function to produce an "<input>" element.
*
* This supports leaving out the cols= and rows= which Xml requires and are
* required by HTML4/XHTML but not required by HTML5.
*
* @param $name string name attribute
* @param $value string value attribute
* @param array $attribs Associative array of miscellaneous extra
* attributes, passed to Html::element()
* @return string Raw HTML
*/
public static function textarea( $name, $value = '', $attribs = array() ) {
$attribs['name'] = $name;
if ( substr( $value, 0, 1 ) == "\n" ) {
// Workaround for bug 12130: browsers eat the initial newline
// assuming that it's just for show, but they do keep the later
// newlines, which we may want to preserve during editing.
// Prepending a single newline
$spacedValue = "\n" . $value;
} else {
$spacedValue = $value;
}
return self::element( 'textarea', $attribs, $spacedValue );
}
/**
* Build a drop-down box for selecting a namespace
*
* @param $params array:
* - selected: [optional] Id of namespace which should be pre-selected
* - all: [optional] Value of item for "all namespaces". If null or unset, no "<option>" is generated to select all namespaces
* - label: text for label to add before the field
* - exclude: [optional] Array of namespace ids to exclude
* - disable: [optional] Array of namespace ids for which the option should be disabled in the selector
* @param array $selectAttribs HTML attributes for the generated select element.
* - id: [optional], default: 'namespace'
* - name: [optional], default: 'namespace'
* @return string HTML code to select a namespace.
*/
public static function namespaceSelector( array $params = array(), array $selectAttribs = array() ) {
global $wgContLang;
ksort( $selectAttribs );
// Is a namespace selected?
if ( isset( $params['selected'] ) ) {
// If string only contains digits, convert to clean int. Selected could also
// be "all" or "" etc. which needs to be left untouched.
// PHP is_numeric() has issues with large strings, PHP ctype_digit has other issues
// and returns false for already clean ints. Use regex instead..
if ( preg_match( '/^\d+$/', $params['selected'] ) ) {
$params['selected'] = intval( $params['selected'] );
}
// else: leaves it untouched for later processing
} else {
$params['selected'] = '';
}
if ( !isset( $params['exclude'] ) || !is_array( $params['exclude'] ) ) {
$params['exclude'] = array();
}
if ( !isset( $params['disable'] ) || !is_array( $params['disable'] ) ) {
$params['disable'] = array();
}
// Associative array between option-values and option-labels
$options = array();
if ( isset( $params['all'] ) ) {
// add an option that would let the user select all namespaces.
// Value is provided by user, the name shown is localized for the user.
$options[$params['all']] = wfMessage( 'namespacesall' )->text();
}
// Add all namespaces as options (in the content language)
$options += $wgContLang->getFormattedNamespaces();
// Convert $options to HTML and filter out namespaces below 0
$optionsHtml = array();
foreach ( $options as $nsId => $nsName ) {
if ( $nsId < NS_MAIN || in_array( $nsId, $params['exclude'] ) ) {
continue;
}
if ( $nsId === NS_MAIN ) {
// For other namespaces use use the namespace prefix as label, but for
// main we don't use "" but the user message describing it (e.g. "(Main)" or "(Article)")
$nsName = wfMessage( 'blanknamespace' )->text();
} elseif ( is_int( $nsId ) ) {
$nsName = $wgContLang->convertNamespace( $nsId );
}
$optionsHtml[] = Html::element(
'option', array(
'disabled' => in_array( $nsId, $params['disable'] ),
'value' => $nsId,
'selected' => $nsId === $params['selected'],
), $nsName
);
}
if ( !array_key_exists( 'id', $selectAttribs ) ) {
$selectAttribs['id'] = 'namespace';
}
if ( !array_key_exists( 'name', $selectAttribs ) ) {
$selectAttribs['name'] = 'namespace';
}
$ret = '';
if ( isset( $params['label'] ) ) {
$ret .= Html::element(
'label', array(
'for' => isset( $selectAttribs['id'] ) ? $selectAttribs['id'] : null,
), $params['label']
) . '&#160;';
}
// Wrap options in a <select>
$ret .= Html::openElement( 'select', $selectAttribs )
. "\n"
. implode( "\n", $optionsHtml )
. "\n"
. Html::closeElement( 'select' );
return $ret;
}
/**
* Constructs the opening html-tag with necessary doctypes depending on
* global variables.
*
* @param array $attribs Associative array of miscellaneous extra
* attributes, passed to Html::element() of html tag.
* @return string Raw HTML
*/
public static function htmlHeader( $attribs = array() ) {
$ret = '';
global $wgHtml5Version, $wgMimeType, $wgXhtmlNamespaces;
$isXHTML = self::isXmlMimeType( $wgMimeType );
if ( $isXHTML ) { // XHTML5
// XML mimetyped markup should have an xml header.
// However a DOCTYPE is not needed.
$ret .= "<?xml version=\"1.0\" encoding=\"UTF-8\" ?" . ">\n";
// Add the standard xmlns
$attribs['xmlns'] = 'http://www.w3.org/1999/xhtml';
// And support custom namespaces
foreach ( $wgXhtmlNamespaces as $tag => $ns ) {
$attribs["xmlns:$tag"] = $ns;
}
} else { // HTML5
// DOCTYPE
$ret .= "<!DOCTYPE html>\n";
}
if ( $wgHtml5Version ) {
$attribs['version'] = $wgHtml5Version;
}
$html = Html::openElement( 'html', $attribs );
if ( $html ) {
$html .= "\n";
}
$ret .= $html;
return $ret;
}
/**
* Determines if the given mime type is xml.
*
* @param $mimetype string MimeType
* @return Boolean
*/
public static function isXmlMimeType( $mimetype ) {
# http://www.whatwg.org/html/infrastructure.html#xml-mime-type
# * text/xml
# * application/xml
# * Any mimetype with a subtype ending in +xml (this implicitly includes application/xhtml+xml)
return (bool)preg_match( '!^(text|application)/xml$|^.+/.+\+xml$!', $mimetype );
}
/**
* Get HTML for an info box with an icon.
*
* @param string $text wikitext, get this with wfMessage()->plain()
* @param string $icon icon name, file in skins/common/images
* @param string $alt alternate text for the icon
* @param string $class additional class name to add to the wrapper div
* @param $useStylePath
*
* @return string
*/
static function infoBox( $text, $icon, $alt, $class = false, $useStylePath = true ) {
global $wgStylePath;
if ( $useStylePath ) {
$icon = $wgStylePath . '/common/images/' . $icon;
}
$s = Html::openElement( 'div', array( 'class' => "mw-infobox $class" ) );
$s .= Html::openElement( 'div', array( 'class' => 'mw-infobox-left' ) ) .
Html::element( 'img',
array(
'src' => $icon,
'alt' => $alt,
)
) .
Html::closeElement( 'div' );
$s .= Html::openElement( 'div', array( 'class' => 'mw-infobox-right' ) ) .
$text .
Html::closeElement( 'div' );
$s .= Html::element( 'div', array( 'style' => 'clear: left;' ), ' ' );
$s .= Html::closeElement( 'div' );
$s .= Html::element( 'div', array( 'style' => 'clear: left;' ), ' ' );
return $s;
}
/**
* Generate a srcset attribute value from an array mapping pixel densities
* to URLs. Note that srcset supports width and height values as well, which
* are not used here.
*
* @param array $urls
* @return string
*/
static function srcSet( $urls ) {
$candidates = array();
foreach ( $urls as $density => $url ) {
// Image candidate syntax per current whatwg live spec, 2012-09-23:
// http://www.whatwg.org/html/embedded-content-1.html#attr-img-srcset
$candidates[] = "{$url} {$density}x";
}
return implode( ", ", $candidates );
}
}
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