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<?php
use MediaWiki\FileRepo\File\File;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\Language\Language;
use MediaWiki\Linker\Linker;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Parser\Parser;
use MediaWiki\Title\Title;
use Wikimedia\Assert\Assert;
/**
* 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
*/
class TraditionalImageGallery extends ImageGalleryBase {
/**
* Return a HTML representation of the image gallery
*
* For each image in the gallery, display
* - a thumbnail
* - the image name
* - the additional text provided when adding the image
* - the size of the image
*
* @return string
*/
public function toHTML() {
$resolveFilesViaParser = $this->mParser instanceof Parser;
if ( $resolveFilesViaParser ) {
$parserOutput = $this->mParser->getOutput();
$repoGroup = null;
$linkRenderer = $this->mParser->getLinkRenderer();
$badFileLookup = $this->mParser->getBadFileLookup();
} else {
$parserOutput = $this->getOutput();
$services = MediaWikiServices::getInstance();
$repoGroup = $services->getRepoGroup();
$linkRenderer = $services->getLinkRenderer();
$badFileLookup = $services->getBadFileLookup();
}
Html::addClass( $this->mAttribs['class'], 'gallery' );
Html::addClass( $this->mAttribs['class'], 'mw-gallery-' . $this->mMode );
if ( $this->mPerRow > 0 ) {
$maxwidth = $this->mPerRow * ( $this->mWidths + $this->getAllPadding() );
$oldStyle = $this->mAttribs['style'] ?? '';
$this->mAttribs['style'] = "max-width: {$maxwidth}px;" . $oldStyle;
}
$parserOutput->addModules( $this->getModules() );
$parserOutput->addModuleStyles( [ 'mediawiki.page.gallery.styles' ] );
$output = Html::openElement( 'ul', $this->mAttribs );
if ( $this->mCaption ) {
$output .= "\n\t" . Html::rawElement( 'li', [ 'class' => 'gallerycaption' ], $this->mCaption );
}
if ( $this->mShowFilename ) {
// Preload LinkCache info for when generating links
// of the filename below
$linkBatchFactory = MediaWikiServices::getInstance()->getLinkBatchFactory();
$lb = $linkBatchFactory->newLinkBatch()->setCaller( __METHOD__ );
foreach ( $this->mImages as [ $title, /* see below */ ] ) {
$lb->addObj( $title );
}
$lb->execute();
}
$lang = $this->getRenderLang();
$enableLegacyMediaDOM =
$this->getConfig()->get( MainConfigNames::ParserEnableLegacyMediaDOM );
$hookRunner = new HookRunner( MediaWikiServices::getInstance()->getHookContainer() );
# Output each image...
foreach ( $this->mImages as [ $nt, $text, $alt, $link, $handlerOpts, $loading, $imageOptions ] ) {
// "text" means "caption" here
/** @var Title $nt */
$descQuery = false;
if ( $nt->inNamespace( NS_FILE ) && !$nt->isExternal() ) {
# Get the file...
if ( $resolveFilesViaParser ) {
# Give extensions a chance to select the file revision for us
$options = [];
$hookRunner->onBeforeParserFetchFileAndTitle(
// @phan-suppress-next-line PhanTypeMismatchArgument Type mismatch on pass-by-ref args
$this->mParser, $nt, $options, $descQuery );
# Fetch and register the file (file title may be different via hooks)
[ $img, $nt ] = $this->mParser->fetchFileAndTitle( $nt, $options );
} else {
$img = $repoGroup->findFile( $nt );
}
} else {
$img = false;
}
$transformOptions = $this->getThumbParams( $img ) + $handlerOpts;
$thumb = $img ? $img->transform( $transformOptions ) : false;
$rdfaType = 'mw:File';
$isBadFile = $img && $thumb && $this->mHideBadImages &&
$badFileLookup->isBadFile( $nt->getDBkey(), $this->getContextTitle() );
if ( !$img || !$thumb || ( !$enableLegacyMediaDOM && $thumb->isError() ) || $isBadFile ) {
$rdfaType = 'mw:Error ' . $rdfaType;
if ( $enableLegacyMediaDOM ) {
if ( $isBadFile ) {
$thumbhtml = $linkRenderer->makeKnownLink( $nt, $nt->getText() );
} else {
$thumbhtml = htmlspecialchars( $img ? $img->getLastError() : $nt->getText() );
}
} else {
$currentExists = $img && $img->exists();
if ( $currentExists && !$thumb ) {
$label = wfMessage( 'thumbnail_error', '' )->text();
} elseif ( $thumb && $thumb->isError() ) {
Assert::invariant(
$thumb instanceof MediaTransformError,
'Unknown MediaTransformOutput: ' . get_class( $thumb )
);
$label = $thumb->toText();
} else {
$label = $alt ?? '';
}
$thumbhtml = Linker::makeBrokenImageLinkObj(
$nt, $label, '', '', '', false, $transformOptions, $currentExists
);
$thumbhtml = Html::rawElement( 'span', [ 'typeof' => $rdfaType ], $thumbhtml );
}
$thumbhtml = "\n\t\t\t" . Html::rawElement(
'div',
[
'class' => 'thumb',
'style' => 'height: ' . ( $this->getThumbPadding() + $this->mHeights ) . 'px;'
],
$thumbhtml
);
if ( !$img && $resolveFilesViaParser ) {
$this->mParser->addTrackingCategory( 'broken-file-category' );
}
} else {
/** @var MediaTransformOutput $thumb */
$vpad = $this->getVPad( $this->mHeights, $thumb->getHeight() );
// Backwards compat before the $imageOptions existed
if ( $imageOptions === null ) {
$imageParameters = [
'desc-link' => true,
'desc-query' => $descQuery,
'alt' => $alt ?? '',
'custom-url-link' => $link
];
} else {
$params = [];
// An empty alt indicates an image is not a key part of the
// content and that non-visual browsers may omit it from
// rendering. Only set the parameter if it's explicitly
// requested.
if ( $alt !== null ) {
$params['alt'] = $alt;
}
$params['title'] = $imageOptions['title'];
if ( !$enableLegacyMediaDOM ) {
$params['img-class'] = 'mw-file-element';
}
$imageParameters = Linker::getImageLinkMTOParams(
$imageOptions, $descQuery, $this->mParser
) + $params;
}
if ( $loading === ImageGalleryBase::LOADING_LAZY ) {
$imageParameters['loading'] = 'lazy';
}
$this->adjustImageParameters( $thumb, $imageParameters );
Linker::processResponsiveImages( $img, $thumb, $transformOptions );
$thumbhtml = $thumb->toHtml( $imageParameters );
if ( !$enableLegacyMediaDOM ) {
$thumbhtml = Html::rawElement(
'span', [ 'typeof' => $rdfaType ], $thumbhtml
);
} else {
$thumbhtml = Html::rawElement( 'div', [
# Auto-margin centering for block-level elements. Needed
# now that we have video handlers since they may emit block-
# level elements as opposed to simple <img> tags. ref
# http://css-discuss.incutio.com/?page=CenteringBlockElement
'style' => "margin:{$vpad}px auto;",
], $thumbhtml );
}
# Set both fixed width and min-height.
$width = $this->getThumbDivWidth( $thumb->getWidth() );
$height = $this->getThumbPadding() + $this->mHeights;
$thumbhtml = "\n\t\t\t" . Html::rawElement( 'div', [
'class' => 'thumb',
'style' => "width: {$width}px;" .
( !$enableLegacyMediaDOM && $this->mMode === 'traditional' ?
" height: {$height}px;" : '' ),
], $thumbhtml );
// Call parser transform hook
if ( $resolveFilesViaParser ) {
/** @var MediaHandler $handler */
$handler = $img->getHandler();
if ( $handler ) {
$handler->parserTransformHook( $this->mParser, $img );
}
$this->mParser->modifyImageHtml(
$img, [ 'handler' => $imageParameters ], $thumbhtml );
}
}
$meta = [];
if ( $img ) {
if ( $this->mShowDimensions ) {
$meta[] = htmlspecialchars( $img->getDimensionsString() );
}
if ( $this->mShowBytes ) {
$meta[] = htmlspecialchars( $lang->formatSize( $img->getSize() ) );
}
} elseif ( $this->mShowDimensions || $this->mShowBytes ) {
$meta[] = $this->msg( 'filemissing' )->escaped();
}
$meta = $lang->semicolonList( $meta );
if ( $meta ) {
$meta .= Html::rawElement( 'br', [] ) . "\n";
}
$textlink = $this->mShowFilename ?
$this->getCaptionHtml( $nt, $lang, $linkRenderer ) :
'';
$galleryText = $this->wrapGalleryText( $textlink . $text . $meta, $thumb );
$gbWidth = $this->getGBWidthOverwrite( $thumb ) ?: $this->getGBWidth( $thumb ) . 'px';
# Weird double wrapping (the extra div inside the li) needed due to FF2 bug
# Can be safely removed if FF2 falls completely out of existence
$output .= "\n\t\t" .
Html::rawElement(
'li',
[ 'class' => 'gallerybox', 'style' => 'width: ' . $gbWidth ],
( $enableLegacyMediaDOM ? Html::openElement( 'div', [ 'style' => 'width: ' . $gbWidth ] ) : '' )
. $thumbhtml
. $galleryText
. "\n\t\t"
. ( $enableLegacyMediaDOM ? Html::closeElement( 'div' ) : '' )
);
}
$output .= "\n" . Html::closeElement( 'ul' );
return $output;
}
/**
* @param Title $nt
* @param Language $lang
* @param LinkRenderer $linkRenderer
* @return string HTML
*/
protected function getCaptionHtml( Title $nt, Language $lang, LinkRenderer $linkRenderer ) {
// Preloaded into LinkCache in toHTML
return $linkRenderer->makeKnownLink(
$nt,
is_int( $this->getCaptionLength() ) ?
$lang->truncateForVisual( $nt->getText(), $this->getCaptionLength() ) :
$nt->getText(),
[
'class' => 'galleryfilename' .
( $this->getCaptionLength() === true ? ' galleryfilename-truncate' : '' )
]
) . "\n";
}
/**
* Add the wrapper html around the thumb's caption
*
* @param string $galleryText The caption
* @param MediaTransformOutput|false $thumb The thumb this caption is for
* or false for bad image.
* @return string
*/
protected function wrapGalleryText( $galleryText, $thumb ) {
return "\n\t\t\t" . Html::rawElement( 'div', [ 'class' => "gallerytext" ], $galleryText );
}
/**
* How much padding the thumb has between the image and the inner div
* that contains the border. This is for both vertical and horizontal
* padding. (However, it is cut in half in the vertical direction).
* @return int
*/
protected function getThumbPadding() {
return 30;
}
/**
* @note GB stands for gallerybox (as in the <li class="gallerybox"> element)
*
* @return int
*/
protected function getGBPadding() {
return 5;
}
/**
* Get how much extra space the borders around the image takes up.
*
* For this mode, it is 2px borders on each side + 2px implied padding on
* each side from the stylesheet, giving us 2*2+2*2 = 8.
* @return int
*/
protected function getGBBorders() {
return 8;
}
/**
* Length (in characters) to truncate filename to in caption when using "showfilename" (if int).
* A value of 'true' will truncate the filename to one line using CSS, while
* 'false' will disable truncating.
*
* @return int|bool
*/
protected function getCaptionLength() {
return $this->mCaptionLength;
}
/**
* Get total padding.
*
* @return int Number of pixels of whitespace surrounding the thumbnail.
*/
protected function getAllPadding() {
return $this->getThumbPadding() + $this->getGBPadding() + $this->getGBBorders();
}
/**
* Get vertical padding for a thumbnail
*
* Generally this is the total height minus how high the thumb is.
*
* @param int $boxHeight How high we want the box to be.
* @param int $thumbHeight How high the thumbnail is.
* @return float Vertical padding to add on each side.
*/
protected function getVPad( $boxHeight, $thumbHeight ) {
return ( $this->getThumbPadding() + $boxHeight - $thumbHeight ) / 2;
}
/**
* Get the transform parameters for a thumbnail.
*
* @param File|false $img The file in question. May be false for invalid image
* @return array
*/
protected function getThumbParams( $img ) {
return [
'width' => $this->mWidths,
'height' => $this->mHeights
];
}
/**
* Get the width of the inner div that contains the thumbnail in
* question. This is the div with the class of "thumb".
*
* @param int $thumbWidth The width of the thumbnail.
* @return float Width of inner thumb div.
*/
protected function getThumbDivWidth( $thumbWidth ) {
return $this->mWidths + $this->getThumbPadding();
}
/**
* Computed width of gallerybox <li>.
*
* Generally is the width of the image, plus padding on image
* plus padding on gallerybox.
*
* @note Important: parameter will be false if no thumb used.
* @param MediaTransformOutput|false $thumb
* @return float Width of gallerybox element
*/
protected function getGBWidth( $thumb ) {
return $this->mWidths + $this->getThumbPadding() + $this->getGBPadding();
}
/**
* Allows overwriting the computed width of the gallerybox <li> with a string,
* like '100%'.
*
* Generally is the width of the image, plus padding on image
* plus padding on gallerybox.
*
* @note Important: parameter will be false if no thumb used.
* @param MediaTransformOutput|false $thumb
* @return string|false Ignored if false.
*/
protected function getGBWidthOverwrite( $thumb ) {
return false;
}
/**
* Get a list of modules to include in the page.
*
* Primarily intended for subclasses.
*
* @return array Modules to include
*/
protected function getModules() {
return [];
}
/**
* Adjust the image parameters for a thumbnail.
*
* Used by a subclass to insert extra high resolution images.
* @param MediaTransformOutput $thumb The thumbnail
* @param array &$imageParameters Array of options
*/
protected function adjustImageParameters( $thumb, &$imageParameters ) {
}
}