ImagePage.php

2008-12-18T19:08:57Z

PasdoMacel: bocmontroc

cvivicnasite
[[User:Scott]] made some modifications to ImagePage.php, so when following redirects from image pages, the image is not displayed.
[[Category:Source Code]]

<pre>
<?php
/**
* @package MediaWiki
*/

/**
*
*/
if( !defined( 'MEDIAWIKI' ) )
die();

require_once( 'Image.php' );

/**
* Special handling for image description pages
* @package MediaWiki
*/
class ImagePage extends Article {

/* private */ var $img; // Image object this page is shown for. Initilaized in openShowImage, not
// available in doDelete etc.

function view() {
if ( Namespace::getImage() == $this->mTitle->getNamespace() ) {
$this->openShowImage();
}

Article::view();

# If the article we've just shown is in the "Image" namespace,
# follow it with the history list and link list for the image
# it describes.

if ( Namespace::getImage() == $this->mTitle->getNamespace() ) {
$this->closeShowImage();
$this->imageHistory();
$this->imageLinks();
}
}

function openShowImage()
{
global $wgOut, $wgUser, $wgImageLimits, $wgRequest, $wgUseImageResize;
$this->img = Image::newFromTitle( $this->mTitle );
$full_url = $this->img->getViewURL();
$anchoropen = '';
$anchorclose = '';

if( $wgUser->getOption( 'imagesize' ) == '' ) {
$sizeSel = User::getDefaultOption( 'imagesize' );
} else {
$sizeSel = IntVal( $wgUser->getOption( 'imagesize' ) );
}
if( !isset( $wgImageLimits[$sizeSel] ) ) {
$sizeSel = User::getDefaultOption( 'imagesize' );
}
$max = $wgImageLimits[$sizeSel];
$maxWidth = $max[0];
$maxHeight = $max[1];

if ( $this->img->exists() ) {

$sk = $wgUser->getSkin();

if ( $this->img->getType() != '' ) {
# image
$width = $this->img->getWidth();
$height = $this->img->getHeight();
$msg = wfMsg('showbigimage', $width, $height, intval( $this->img->getSize()/1024 ) );
if ( $width > $maxWidth ) {
$height = floor( $height * $maxWidth / $width );
$width = $maxWidth;
}
if ( $height > $maxHeight ) {
$width = floor( $width * $maxHeight / $height );
$height = $maxHeight;
}
if ( $width != $this->img->getWidth() || $height != $this->img->getHeight() ) {
if( $wgUseImageResize ) {
$thumbnail = $this->img->getThumbnail( $width );
if ( ( $thumbnail == null )
|| ( ( ! $this->img->mustRender() )
&& ( $thumbnail->getSize() > $this->img->getSize() ) ) ) {
# the thumbnail is bigger thatn the original image.
# show the original image instead of the thumb.
$url = $full_url;
$width = $this->img->getWidth();
$height = $this->img->getHeight();
} else {
$url = $thumbnail->getUrl();
}
} else {
# No resize ability? Show the full image, but scale
# it down in the browser so it fits on the page.
$url = $full_url;
}
$anchoropen = "<a href=\"{$full_url}\">";
$anchorclose = "</a><br />\n$anchoropen{$msg}</a>";
} else {
$url = $full_url;
}
# Changes by Scott Morrison, Aug 30, 2005. No rights reserved.
# try to determine if the image page we're on contains an image, without messing anything else up!
# this is a hack, and someone who knows better should fix it!
# in particular, the literal string "Image:" needs to be fixed.
$pageTitle = $this->getTitle();
$pageTitle = $pageTitle->getText();
$article = & new Article( Title::newFromText( "Image:".$pageTitle ) );
$content = $article->getContent( true );
# now if we've been specifically asked not to redirect, or we're on a normal image page, or , show the image
# otherwise, we're about to be redirected somewhere else, so don't show the image!
if($wgRequest->getVal( 'redirect' ) == 'no' || substr($content, 0 , 9) != '#REDIRECT') {
$s = '<div class="fullImageLink">' . $anchoropen .
"<img border=\"0\" src=\"{$url}\" width=\"{$width}\" height=\"{$height}\" alt=\"" .
htmlspecialchars( $wgRequest->getVal( 'image' ) ).'" />' . $anchorclose . '</div>';
} else {
$s = '';
}
} else {
$s = "<div class=\"fullMedia\">" . $sk->makeMediaLink( $this->img->getName(),'' ) . '</div>';
}
$wgOut->addHTML( $s );
if($this->img->fromSharedDirectory) {
$wgOut->addWikiText("<div class=\"sharedUploadNotice\">".wfMsg("sharedupload")."</div>");
}
}
}

function closeShowImage()
{
# For overloading
}

/**
* If the page we've just displayed is in the "Image" namespace,
* we follow it with an upload history of the image and its usage.
*/
function imageHistory()
{
global $wgUser, $wgOut;

$sk = $wgUser->getSkin();

$line = $this->img->nextHistoryLine();

if ( $line ) {
$list =& new ImageHistoryList( $sk );
$s = $list->beginImageHistoryList() .
$list->imageHistoryLine( true, $line->img_timestamp,
$this->mTitle->getDBkey(), $line->img_user,
$line->img_user_text, $line->img_size, $line->img_description );

while ( $line = $this->img->nextHistoryLine() ) {
$s .= $list->imageHistoryLine( false, $line->img_timestamp,
$line->oi_archive_name, $line->img_user,
$line->img_user_text, $line->img_size, $line->img_description );
}
$s .= $list->endImageHistoryList();
} else { $s=''; }
$wgOut->addHTML( $s );
}

function imageLinks()
{
global $wgUser, $wgOut;

$wgOut->addHTML( '<h2>' . wfMsg( 'imagelinks' ) . "</h2>\n" );

$dbr =& wfGetDB( DB_SLAVE );
$cur = $dbr->tableName( 'cur' );
$imagelinks = $dbr->tableName( 'imagelinks' );

$sql = "SELECT cur_namespace,cur_title FROM $imagelinks,$cur WHERE il_to=" .
$dbr->addQuotes( $this->mTitle->getDBkey() ) . " AND il_from=cur_id"
. " LIMIT 500"; # quickie emergency brake
$res = $dbr->query( $sql, "ImagePage::imageLinks" );

if ( 0 == $dbr->numRows( $res ) ) {
$wgOut->addHtml( '<p>' . wfMsg( "nolinkstoimage" ) . "</p>\n" );
return;
}
$wgOut->addHTML( '<p>' . wfMsg( 'linkstoimage' ) . "</p>\n<ul>" );

$sk = $wgUser->getSkin();
while ( $s = $dbr->fetchObject( $res ) ) {
$name = Title::MakeTitle( $s->cur_namespace, $s->cur_title );
$link = $sk->makeKnownLinkObj( $name, "" );
$wgOut->addHTML( "<li>{$link}</li>\n" );
}
$wgOut->addHTML( "</ul>\n" );
}

function delete()
{
global $wgUser, $wgOut, $wgRequest;

$confirm = $wgRequest->getBool( 'wpConfirm' );
$image = $wgRequest->getVal( 'image' );
$oldimage = $wgRequest->getVal( 'oldimage' );

# Only sysops can delete images. Previously ordinary users could delete
# old revisions, but this is no longer the case.
if ( !$wgUser->isAllowed('delete') ) {
$wgOut->sysopRequired();
return;
}
if ( $wgUser->isBlocked() ) {
return $this->blockedIPpage();
}
if ( wfReadOnly() ) {
$wgOut->readOnlyPage();
return;
}

# Better double-check that it hasn't been deleted yet!
$wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
if ( !is_null( $image ) ) {
if ( '' == trim( $image ) ) {
$wgOut->fatalError( wfMsg( 'cannotdelete' ) );
return;
}
}

# Deleting old images doesn't require confirmation
if ( !is_null( $oldimage ) || $confirm ) {
if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
$this->doDelete();
} else {
$wgOut->fatalError( wfMsg( 'sessionfailure' ) );
}
return;
}

if ( !is_null( $image ) ) {
$q = '&image=' . urlencode( $image );
} else if ( !is_null( $oldimage ) ) {
$q = '&oldimage=' . urlencode( $oldimage );
} else {
$q = '';
}
return $this->confirmDelete( $q, $wgRequest->getText( 'wpReason' ) );
}

function doDelete()
{
global $wgOut, $wgUser, $wgContLang, $wgRequest;
global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;
$fname = 'ImagePage::doDelete';

$reason = $wgRequest->getVal( 'wpReason' );
$oldimage = $wgRequest->getVal( 'oldimage' );

$dbw =& wfGetDB( DB_MASTER );

if ( !is_null( $oldimage ) ) {
if ( strlen( $oldimage ) < 16 ) {
$wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
return;
}
if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
$wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
return;
}
# Squid purging
if ( $wgUseSquid ) {
$archUrl = wfImageArchiveUrl( $oldimage );
# don't prefix with internal server if we share one (-> Commons)
$prefix = preg_match("/^http:\/\//",$archUrl) ? '' : $wgInternalServer;
$urlArr = Array(
$prefix.$archUrl
);
wfPurgeSquidServers($urlArr);
}
$this->doDeleteOldImage( $oldimage );
$dbw->delete( 'oldimage', array( 'oi_archive_name' => $oldimage ) );
$deleted = $oldimage;
} else {
$image = $this->mTitle->getDBkey();
$dest = wfImageDir( $image );
$archive = wfImageDir( $image );

# Delete the image file if it exists; due to sync problems
# or manual trimming sometimes the file will be missing.
$targetFile = "{$dest}/{$image}";
if( file_exists( $targetFile ) && ! @unlink( $targetFile ) ) {
# If the deletion operation actually failed, bug out:
$wgOut->fileDeleteError( $targetFile );
return;
}
$dbw->delete( 'image', array( 'img_name' => $image ) );
$res = $dbw->select( 'oldimage', array( 'oi_archive_name' ), array( 'oi_name' => $image ) );

# Squid purging
if ( $wgUseSquid ) {
$curUrl = Image::wfImageUrl( $image );
# don't prefix with internal server if we share one (-> Commons)
$prefix = preg_match("/^http:\/\//",$curUrl) ? '' : $wgInternalServer;
$urlArr = Array(
$prefix.$curUrl
);
wfPurgeSquidServers($urlArr);
}

$urlArr = Array();
while ( $s = $dbw->fetchObject( $res ) ) {
$this->doDeleteOldImage( $s->oi_archive_name );
$urlArr[] = $wgInternalServer.wfImageArchiveUrl( $s->oi_archive_name );
}

# Squid purging, part II
if ( $wgUseSquid ) {
/* this needs to be done after LinksUpdate */
$u = new SquidUpdate( $urlArr );
array_push( $wgDeferredUpdateList, $u );
}

$dbw->delete( 'oldimage', array( 'oi_name' => $image ) );

# Image itself is now gone, and database is cleaned.
# Now we remove the image description page.

$nt = Title::newFromText( $wgContLang->getNsText( Namespace::getImage() ) . ":" . $image );
$article = new Article( $nt );
$article->doDeleteArticle( $reason ); # ignore errors

/* refresh image metadata cache */
new Image( $image, true );

$deleted = $image;
}

$wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
$wgOut->setRobotpolicy( 'noindex,nofollow' );

$sk = $wgUser->getSkin();
$loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_SPECIAL ) .
':Log/delete', wfMsg( 'deletionlog' ) );

$text = wfMsg( 'deletedtext', $deleted, $loglink );

$wgOut->addHTML( '<p>' . $text . "</p>\n" );
$wgOut->returnToMain( false );
}

function doDeleteOldImage( $oldimage )
{
global $wgOut;

$name = substr( $oldimage, 15 );
$archive = wfImageArchiveDir( $name );

# Delete the image if it exists. Sometimes the file will be missing
# due to manual intervention or weird sync problems; treat that
# condition gracefully and continue to delete the database entry.
# Also some records may end up with an empty oi_archive_name field
# if the original file was missing when a new upload was made;
# don't try to delete the directory then!
#
$targetFile = "{$archive}/{$oldimage}";
if( $oldimage != '' && file_exists( $targetFile ) && !@unlink( $targetFile ) ) {
# If we actually have a file and can't delete it, throw an error.
$wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
} else {
# Log the deletion
$log = new LogPage( 'delete' );
$log->addEntry( 'delete', $this->mTitle, wfMsg('deletedrevision',$oldimage) );
}
}

function revert()
{
global $wgOut, $wgRequest, $wgUser;
global $wgUseSquid, $wgInternalServer, $wgDeferredUpdateList;

$oldimage = $wgRequest->getText( 'oldimage' );
if ( strlen( $oldimage ) < 16 ) {
$wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
return;
}
if ( strstr( $oldimage, "/" ) || strstr( $oldimage, "\\" ) ) {
$wgOut->unexpectedValueError( 'oldimage', htmlspecialchars($oldimage) );
return;
}

if ( wfReadOnly() ) {
$wgOut->readOnlyPage();
return;
}
if( $wgUser->getId() == 0 ) {
$wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
return;
}
if ( ! $this->mTitle->userCanEdit() ) {
$wgOut->sysopRequired();
return;
}
if ( $wgUser->isBlocked() ) {
return $this->blockedIPpage();
}
if( !$wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $oldimage ) ) {
$wgOut->errorpage( 'internalerror', 'sessionfailure' );
return;
}
$name = substr( $oldimage, 15 );

$dest = wfImageDir( $name );
$archive = wfImageArchiveDir( $name );
$curfile = "{$dest}/{$name}";

if ( ! is_file( $curfile ) ) {
$wgOut->fileNotFoundError( htmlspecialchars( $curfile ) );
return;
}
$oldver = wfTimestampNow() . "!{$name}";

$dbr =& wfGetDB( DB_SLAVE );
$size = $dbr->selectField( 'oldimage', 'oi_size', 'oi_archive_name=\'' .
$dbr->strencode( $oldimage ) . "'" );

if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
$wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
return;
}
if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
$wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
}
wfRecordUpload( $name, $oldver, $size, wfMsg( "reverted" ) );

/* refresh image metadata cache */
new Image( $name, true );

# Squid purging
if ( $wgUseSquid ) {
$archUrl = wfImageArchiveUrl( $name );
$curUrl = Image::wfImageUrl( $name );
$prefix = preg_match("/^http:\/\//",$curUrl) ? '' : $wgInternalServer;
$urlArr = Array(
$prefix.$archUrl,
$prefix.$curUrl
);
wfPurgeSquidServers($urlArr);
}

$wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
$wgOut->setRobotpolicy( 'noindex,nofollow' );
$wgOut->addHTML( wfMsg( 'imagereverted' ) );
$wgOut->returnToMain( false );
}

function blockedIPpage() {
# yucky hack
require_once( 'EditPage.php' );
$edit = new EditPage( $this->mTitle );
$edit->blockedIPpage();
return;
}
}

class ImageHistoryList {
function ImageHistoryList( &$skin ) {
$this->skin =& $skin;
}

function beginImageHistoryList() {
$s = "\n<h2>" . wfMsg( 'imghistory' ) . "</h2>\n" .
"<p>" . wfMsg( 'imghistlegend' ) . "</p>\n".'<ul class="special">';
return $s;
}

function endImageHistoryList() {
$s = "</ul>\n";
return $s;
}

function imageHistoryLine( $iscur, $timestamp, $img, $user, $usertext, $size, $description ) {
global $wgUser, $wgLang, $wgContLang, $wgTitle;

$datetime = $wgLang->timeanddate( $timestamp, true );
$del = wfMsg( 'deleteimg' );
$delall = wfMsg( 'deleteimgcompletely' );
$cur = wfMsg( 'cur' );

if ( $iscur ) {
$url = Image::wfImageUrl( $img );
$rlink = $cur;
if ( $wgUser->isAllowed('delete') ) {
$link = $wgTitle->escapeLocalURL( 'image=' . $wgTitle->getPartialURL() .
'&action=delete' );
$style = $this->skin->getInternalLinkAttributes( $link, $delall );

$dlink = '<a href="'.$link.'"'.$style.'>'.$delall.'</a>';
} else {
$dlink = $del;
}
} else {
$url = htmlspecialchars( wfImageArchiveUrl( $img ) );
if( $wgUser->getID() != 0 && $wgTitle->userCanEdit() ) {
$token = urlencode( $wgUser->editToken( $img ) );
$rlink = $this->skin->makeKnownLink( $wgTitle->getPrefixedText(),
wfMsg( 'revertimg' ), 'action=revert&oldimage=' .
urlencode( $img ) . "&wpEditToken=$token" );
$dlink = $this->skin->makeKnownLink( $wgTitle->getPrefixedText(),
$del, 'action=delete&oldimage=' . urlencode( $img ) .
"&wpEditToken=$token" );
} else {
# Having live active links for non-logged in users
# means that bots and spiders crawling our site can
# inadvertently change content. Baaaad idea.
$rlink = wfMsg( 'revertimg' );
$dlink = $del;
}
}
if ( 0 == $user ) {
$userlink = $usertext;
} else {
$userlink = $this->skin->makeLink( $wgContLang->getNsText( Namespace::getUser() ) .
':'.$usertext, $usertext );
}
$nbytes = wfMsg( 'nbytes', $size );
$style = $this->skin->getInternalLinkAttributes( $url, $datetime );

$s = "<li> ({$dlink}) ({$rlink}) <a href=\"{$url}\"{$style}>{$datetime}</a>"
. " . . {$userlink} ({$nbytes})";

if ( '' != $description && '*' != $description ) {
$sk=$wgUser->getSkin();
$s .= $wgContLang->emphasize(' (' . $sk->formatComment($description,$wgTitle) . ')');
}
$s .= "</li>\n";
return $s;
}
}

?>
</pre>

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ImagePage.php