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<?php
/**
* Image gallery.
*
* 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
*/
/**
* Image gallery
*
* Add images to the gallery using add(), then render that list to HTML using toHTML().
*
* @ingroup Media
*/
abstract class ImageGalleryBase extends ContextSource {
/**
* @var array Gallery images
*/
protected $mImages;
/**
* @var bool Whether to show the filesize in bytes in categories
*/
protected $mShowBytes;
/**
* @var bool Whether to show the filename. Default: true
*/
protected $mShowFilename;
/**
* @var string Gallery mode. Default: traditional
*/
protected $mMode;
/**
* @var bool|string Gallery caption. Default: false
*/
protected $mCaption = false;
/**
* @var bool Hide blacklisted images?
*/
protected $mHideBadImages;
/**
* @var Parser Registered parser object for output callbacks
*/
public $mParser;
/**
* @var Title Contextual title, used when images are being screened against
* the bad image list
*/
protected $contextTitle = false;
/** @var array */
protected $mAttribs = [];
/** @var bool */
static private $modeMapping = false;
/**
* Get a new image gallery. This is the method other callers
* should use to get a gallery.
*
* @param string|bool $mode Mode to use. False to use the default
* @param IContextSource|null $context
* @return ImageGalleryBase
* @throws MWException
*/
static function factory( $mode = false, IContextSource $context = null ) {
global $wgContLang;
self::loadModes();
if ( !$context ) {
$context = RequestContext::getMainAndWarn( __METHOD__ );
}
if ( !$mode ) {
$galleryOptions = $context->getConfig()->get( 'GalleryOptions' );
$mode = $galleryOptions['mode'];
}
$mode = $wgContLang->lc( $mode );
if ( isset( self::$modeMapping[$mode] ) ) {
$class = self::$modeMapping[$mode];
return new $class( $mode, $context );
} else {
throw new MWException( "No gallery class registered for mode $mode" );
}
}
private static function loadModes() {
if ( self::$modeMapping === false ) {
self::$modeMapping = [
'traditional' => 'TraditionalImageGallery',
'nolines' => 'NolinesImageGallery',
'packed' => 'PackedImageGallery',
'packed-hover' => 'PackedHoverImageGallery',
'packed-overlay' => 'PackedOverlayImageGallery',
];
// Allow extensions to make a new gallery format.
Hooks::run( 'GalleryGetModes', [ &self::$modeMapping ] );
}
}
/**
* Create a new image gallery object.
*
* You should not call this directly, but instead use
* ImageGalleryBase::factory().
* @param string $mode
* @param IContextSource|null $context
*/
function __construct( $mode = 'traditional', IContextSource $context = null ) {
if ( $context ) {
$this->setContext( $context );
}
$galleryOptions = $this->getConfig()->get( 'GalleryOptions' );
$this->mImages = [];
$this->mShowBytes = $galleryOptions['showBytes'];
$this->mShowFilename = true;
$this->mParser = false;
$this->mHideBadImages = false;
$this->mPerRow = $galleryOptions['imagesPerRow'];
$this->mWidths = $galleryOptions['imageWidth'];
$this->mHeights = $galleryOptions['imageHeight'];
$this->mCaptionLength = $galleryOptions['captionLength'];
$this->mMode = $mode;
}
/**
* Register a parser object. If you do not set this
* and the output of this gallery ends up in parser
* cache, the javascript will break!
*
* @note This also triggers using the page's target
* language instead of the user language.
*
* @param Parser $parser
*/
function setParser( $parser ) {
$this->mParser = $parser;
}
/**
* Set bad image flag
* @param bool $flag
*/
function setHideBadImages( $flag = true ) {
$this->mHideBadImages = $flag;
}
/**
* Set the caption (as plain text)
*
* @param string $caption Caption
*/
function setCaption( $caption ) {
$this->mCaption = htmlspecialchars( $caption );
}
/**
* Set the caption (as HTML)
*
* @param string $caption Caption
*/
public function setCaptionHtml( $caption ) {
$this->mCaption = $caption;
}
/**
* Set how many images will be displayed per row.
*
* @param int $num Integer >= 0; If perrow=0 the gallery layout will adapt
* to screensize invalid numbers will be rejected
*/
public function setPerRow( $num ) {
if ( $num >= 0 ) {
$this->mPerRow = (int)$num;
}
}
/**
* Set how wide each image will be, in pixels.
*
* @param int $num Integer > 0; invalid numbers will be ignored
*/
public function setWidths( $num ) {
if ( $num > 0 ) {
$this->mWidths = (int)$num;
}
}
/**
* Set how high each image will be, in pixels.
*
* @param int $num Integer > 0; invalid numbers will be ignored
*/
public function setHeights( $num ) {
if ( $num > 0 ) {
$this->mHeights = (int)$num;
}
}
/**
* Allow setting additional options. This is meant
* to allow extensions to add additional parameters to
* <gallery> parser tag.
*
* @param array $options Attributes of gallery tag
*/
public function setAdditionalOptions( $options ) {
}
/**
* Add an image to the gallery.
*
* @param Title $title Title object of the image that is added to the gallery
* @param string $html Additional HTML text to be shown. The name and size
* of the image are always shown.
* @param string $alt Alt text for the image
* @param string $link Override image link (optional)
* @param array $handlerOpts Array of options for image handler (aka page number)
*/
function add( $title, $html = '', $alt = '', $link = '', $handlerOpts = [] ) {
if ( $title instanceof File ) {
// Old calling convention
$title = $title->getTitle();
}
$this->mImages[] = [ $title, $html, $alt, $link, $handlerOpts ];
wfDebug( 'ImageGallery::add ' . $title->getText() . "\n" );
}
/**
* Add an image at the beginning of the gallery.
*
* @param Title $title Title object of the image that is added to the gallery
* @param string $html Additional HTML text to be shown. The name and size
* of the image are always shown.
* @param string $alt Alt text for the image
* @param string $link Override image link (optional)
* @param array $handlerOpts Array of options for image handler (aka page number)
*/
function insert( $title, $html = '', $alt = '', $link = '', $handlerOpts = [] ) {
if ( $title instanceof File ) {
// Old calling convention
$title = $title->getTitle();
}
array_unshift( $this->mImages, [ &$title, $html, $alt, $link, $handlerOpts ] );
}
/**
* Returns the list of images this gallery contains
* @return array
*/
public function getImages() {
return $this->mImages;
}
/**
* isEmpty() returns true if the gallery contains no images
* @return bool
*/
function isEmpty() {
return empty( $this->mImages );
}
/**
* Enable/Disable showing of the file size of an image in the gallery.
* Enabled by default.
*
* @param bool $f Set to false to disable
*/
function setShowBytes( $f ) {
$this->mShowBytes = (bool)$f;
}
/**
* Enable/Disable showing of the filename of an image in the gallery.
* Enabled by default.
*
* @param bool $f Set to false to disable
*/
function setShowFilename( $f ) {
$this->mShowFilename = (bool)$f;
}
/**
* Set arbitrary attributes to go on the HTML gallery output element.
* Should be suitable for a <ul> element.
*
* Note -- if taking from user input, you should probably run through
* Sanitizer::validateAttributes() first.
*
* @param array $attribs Array of HTML attribute pairs
*/
function setAttributes( $attribs ) {
$this->mAttribs = $attribs;
}
/**
* Display an html representation of the gallery
*
* @return string The html
*/
abstract public function toHTML();
/**
* @return int Number of images in the gallery
*/
public function count() {
return count( $this->mImages );
}
/**
* Set the contextual title
*
* @param Title $title Contextual title
*/
public function setContextTitle( $title ) {
$this->contextTitle = $title;
}
/**
* Get the contextual title, if applicable
*
* @return Title|bool Title or false
*/
public function getContextTitle() {
return is_object( $this->contextTitle ) && $this->contextTitle instanceof Title
? $this->contextTitle
: false;
}
/**
* Determines the correct language to be used for this image gallery
* @return Language
*/
protected function getRenderLang() {
return $this->mParser
? $this->mParser->getTargetLanguage()
: $this->getLanguage();
}
}