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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
*/
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
*/
function toHTML() {
if ( $this->mPerRow > 0 ) {
$maxwidth = $this->mPerRow * ( $this->mWidths + $this->getAllPadding() );
$oldStyle = isset( $this->mAttribs['style'] ) ? $this->mAttribs['style'] : '';
# _width is ignored by any sane browser. IE6 doesn't know max-width
# so it uses _width instead
$this->mAttribs['style'] = "max-width: {$maxwidth}px;_width: {$maxwidth}px;" .
$oldStyle;
}
$attribs = Sanitizer::mergeAttributes(
[ 'class' => 'gallery mw-gallery-' . $this->mMode ], $this->mAttribs );
$modules = $this->getModules();
if ( $this->mParser ) {
$this->mParser->getOutput()->addModules( $modules );
$this->mParser->getOutput()->addModuleStyles( 'mediawiki.page.gallery.styles' );
} else {
$this->getOutput()->addModules( $modules );
$this->getOutput()->addModuleStyles( 'mediawiki.page.gallery.styles' );
}
$output = Xml::openElement( 'ul', $attribs );
if ( $this->mCaption ) {
$output .= "\n\t<li class='gallerycaption'>{$this->mCaption}</li>";
}
if ( $this->mShowFilename ) {
// Preload LinkCache info for when generating links
// of the filename below
$lb = new LinkBatch();
foreach ( $this->mImages as $img ) {
$lb->addObj( $img[0] );
}
$lb->execute();
}
$lang = $this->getRenderLang();
# Output each image...
foreach ( $this->mImages as $pair ) {
/** @var Title $nt */
$nt = $pair[0];
$text = $pair[1]; # "text" means "caption" here
$alt = $pair[2];
$link = $pair[3];
$descQuery = false;
if ( $nt->getNamespace() === NS_FILE ) {
# Get the file...
if ( $this->mParser instanceof Parser ) {
# Give extensions a chance to select the file revision for us
$options = [];
Hooks::run( 'BeforeParserFetchFileAndTitle',
[ $this->mParser, $nt, &$options, &$descQuery ] );
# Fetch and register the file (file title may be different via hooks)
list( $img, $nt ) = $this->mParser->fetchFileAndTitle( $nt, $options );
} else {
$img = wfFindFile( $nt );
}
} else {
$img = false;
}
$params = $this->getThumbParams( $img );
// $pair[4] is per image handler options
$transformOptions = $params + $pair[4];
$thumb = false;
if ( !$img ) {
# We're dealing with a non-image, spit out the name and be done with it.
$thumbhtml = "\n\t\t\t" . '<div class="thumb" style="height: '
. ( $this->getThumbPadding() + $this->mHeights ) . 'px;">'
. htmlspecialchars( $nt->getText() ) . '</div>';
if ( $this->mParser instanceof Parser ) {
$this->mParser->addTrackingCategory( 'broken-file-category' );
}
} elseif ( $this->mHideBadImages
&& wfIsBadImage( $nt->getDBkey(), $this->getContextTitle() )
) {
# The image is blacklisted, just show it as a text link.
$thumbhtml = "\n\t\t\t" . '<div class="thumb" style="height: ' .
( $this->getThumbPadding() + $this->mHeights ) . 'px;">' .
Linker::linkKnown(
$nt,
htmlspecialchars( $nt->getText() )
) .
'</div>';
} else {
$thumb = $img->transform( $transformOptions );
if ( !$thumb ) {
# Error generating thumbnail.
$thumbhtml = "\n\t\t\t" . '<div class="thumb" style="height: '
. ( $this->getThumbPadding() + $this->mHeights ) . 'px;">'
. htmlspecialchars( $img->getLastError() ) . '</div>';
} else {
/** @var MediaTransformOutput $thumb */
$vpad = $this->getVPad( $this->mHeights, $thumb->getHeight() );
$imageParameters = [
'desc-link' => true,
'desc-query' => $descQuery,
'alt' => $alt,
'custom-url-link' => $link
];
// In the absence of both alt text and caption, fall back on
// providing screen readers with the filename as alt text
if ( $alt == '' && $text == '' ) {
$imageParameters['alt'] = $nt->getText();
}
$this->adjustImageParameters( $thumb, $imageParameters );
Linker::processResponsiveImages( $img, $thumb, $transformOptions );
# Set both fixed width and min-height.
$thumbhtml = "\n\t\t\t"
. '<div class="thumb" style="width: '
. $this->getThumbDivWidth( $thumb->getWidth() ) . 'px;">'
# 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
. '<div style="margin:' . $vpad . 'px auto;">'
. $thumb->toHtml( $imageParameters ) . '</div></div>';
// Call parser transform hook
/** @var MediaHandler $handler */
$handler = $img->getHandler();
if ( $this->mParser && $handler ) {
$handler->parserTransformHook( $this->mParser, $img );
}
}
}
// @todo Code is incomplete.
// $linkTarget = Title::newFromText( $wgContLang->getNsText( MWNamespace::getUser() ) .
// ":{$ut}" );
// $ul = Linker::link( $linkTarget, $ut );
if ( $this->mShowBytes ) {
if ( $img ) {
$fileSize = htmlspecialchars( $lang->formatSize( $img->getSize() ) );
} else {
$fileSize = $this->msg( 'filemissing' )->escaped();
}
$fileSize = "$fileSize<br />\n";
} else {
$fileSize = '';
}
$textlink = $this->mShowFilename ?
// Preloaded into LinkCache above
Linker::linkKnown(
$nt,
htmlspecialchars(
$this->mCaptionLength !== true ?
$lang->truncate( $nt->getText(), $this->mCaptionLength ) :
$nt->getText()
),
[
'class' => 'galleryfilename' .
( $this->mCaptionLength === true ? ' galleryfilename-truncate' : '' )
]
) . "\n" :
'';
$galleryText = $textlink . $text . $fileSize;
$galleryText = $this->wrapGalleryText( $galleryText, $thumb );
# 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" . '<li class="gallerybox" style="width: '
. $this->getGBWidth( $thumb ) . 'px">'
. '<div style="width: ' . $this->getGBWidth( $thumb ) . 'px">'
. $thumbhtml
. $galleryText
. "\n\t\t</div></li>";
}
$output .= "\n</ul>";
return $output;
}
/**
* Add the wrapper html around the thumb's caption
*
* @param string $galleryText The caption
* @param MediaTransformOutput|bool $thumb The thumb this caption is for
* or false for bad image.
* @return string
*/
protected function wrapGalleryText( $galleryText, $thumb ) {
# ATTENTION: The newline after <div class="gallerytext"> is needed to
# accommodate htmltidy which in version 4.8.6 generated crackpot html in
# its absence, see: https://phabricator.wikimedia.org/T3765
# -Ævar
return "\n\t\t\t" . '<div class="gallerytext">' . "\n"
. $galleryText
. "\n\t\t\t</div>";
}
/**
* 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;
}
/**
* 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 int 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 $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 int Width of inner thumb div.
*/
protected function getThumbDivWidth( $thumbWidth ) {
return $this->mWidths + $this->getThumbPadding();
}
/**
* 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|bool $thumb MediaTransformObject object or false.
* @return int Width of gallerybox element
*/
protected function getGBWidth( $thumb ) {
return $this->mWidths + $this->getThumbPadding() + $this->getGBPadding();
}
/**
* 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 ) {
}
}
/**
* Backwards compatibility. This always uses traditional mode
* if called the old way, for extensions that may expect traditional
* mode.
*
* @deprecated since 1.22 Use ImageGalleryBase::factory instead.
*/
class ImageGallery extends TraditionalImageGallery {
function __construct( $mode = 'traditional' ) {
wfDeprecated( __METHOD__, '1.22' );
parent::__construct( $mode );
}
}