global $wgOut, $wgUseExternalEditor;
$this->loadFile();
- $s = '';
- if( $this->img->exists() ) {
- $list = new ImageHistoryList( $this );
- $file = $this->img;
- $s = $list->beginImageHistoryList();
- $s .= $list->imageHistoryLine( true, $file );
- // old image versions
- $hist = $this->img->getHistory();
- foreach( $hist as $file ) {
- $s .= $list->imageHistoryLine( false, $file );
- }
- $s .= $list->endImageHistoryList();
- }
- $wgOut->addHTML( $s );
+ $pager = new ImageHistoryPseudoPager( $this );
+ # Generate prev/next links
+ $wgOut->addHTML( $pager->getBody() );
$this->img->resetHistory(); // free db resources
return $this->img;
}
- public function beginImageHistoryList() {
+ public function beginImageHistoryList( $navLinks = '' ) {
global $wgOut, $wgUser;
return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) )
. $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
+ . $navLinks
. Xml::openElement( 'table', array( 'class' => 'filehistory' ) ) . "\n"
. '<tr><td></td>'
. ( $this->current->isLocal() && ($wgUser->isAllowed('delete') || $wgUser->isAllowed('deleterevision') ) ? '<td></td>' : '' )
. "</tr>\n";
}
- public function endImageHistoryList() {
- return "</table>\n";
+ public function endImageHistoryList( $navLinks = '' ) {
+ return "</table>\n$navLinks\n";
}
public function imageHistoryLine( $iscur, $file ) {
return "<tr{$classAttr}>{$row}</tr>\n";
}
}
+
+class ImageHistoryPseudoPager extends ReverseChronologicalPager {
+ function __construct( $imagePage ) {
+ parent::__construct();
+ $this->mImagePage =& $imagePage;
+ $this->mTitle = $imagePage->getTitle();
+ $this->mImg = NULL;
+ $this->mHist = array();
+ $this->mRange = array( 0, 0 ); // display range
+ }
+
+ function getQueryInfo() {
+ return false;
+ }
+
+ function getIndexField() {
+ return '';
+ }
+
+ function formatRow( $row ) {
+ return '';
+ }
+
+ function getBody() {
+ $s = '';
+ $this->doQuery();
+ if( count($this->mHist) ) {
+ $list = new ImageHistoryList( $this->mImagePage );
+ # Generate prev/next links
+ $navLink = $this->getNavigationBar();
+ $s = $list->beginImageHistoryList($navLink);
+ // Skip rows there just for paging links
+ for( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
+ $file = $this->mHist[$i];
+ $s .= $list->imageHistoryLine( !$file->isOld(), $file );
+ }
+ $s .= $list->endImageHistoryList($navLink);
+ }
+ return $s;
+ }
+
+ function doQuery() {
+ if( $this->mQueryDone ) return;
+ $this->mImg = $this->mImagePage->getFile(); // ensure loading
+ if( !$this->mImg->exists() ) {
+ return;
+ }
+ $queryLimit = $this->mLimit + 1; // limit plus extra row
+ if( $this->mIsBackwards ) {
+ // Fetch the file history
+ $this->mHist = $this->mImg->getHistory($queryLimit,null,$this->mOffset,false);
+ // The current rev may not meet the offset/limit
+ $numRows = count($this->mHist);
+ if( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
+ $this->mHist = array_merge( array($this->mImg), $this->mHist );
+ }
+ } else {
+ // The current rev may not meet the offset
+ if( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
+ $this->mHist[] = $this->mImg;
+ }
+ // Old image versions (fetch extra row for nav links)
+ $oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit+1;
+ // Fetch the file history
+ $this->mHist = array_merge( $this->mHist,
+ $this->mImg->getHistory($oiLimit,$this->mOffset,null,false) );
+ }
+ $numRows = count($this->mHist); // Total number of query results
+ if( $numRows ) {
+ # Index value of top item in the list
+ $firstIndex = $this->mIsBackwards ?
+ $this->mHist[$numRows-1]->getTimestamp() : $this->mHist[0]->getTimestamp();
+ # Discard the extra result row if there is one
+ if( $numRows > $this->mLimit && $numRows > 1 ) {
+ if( $this->mIsBackwards ) {
+ # Index value of item past the index
+ $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
+ # Index value of bottom item in the list
+ $lastIndex = $this->mHist[1]->getTimestamp();
+ # Display range
+ $this->mRange = array( 1, $numRows-1 );
+ } else {
+ # Index value of item past the index
+ $this->mPastTheEndIndex = $this->mHist[$numRows-1]->getTimestamp();
+ # Index value of bottom item in the list
+ $lastIndex = $this->mHist[$numRows-2]->getTimestamp();
+ # Display range
+ $this->mRange = array( 0, $numRows-2 );
+ }
+ } else {
+ # Setting indexes to an empty string means that they will be
+ # omitted if they would otherwise appear in URLs. It just so
+ # happens that this is the right thing to do in the standard
+ # UI, in all the relevant cases.
+ $this->mPastTheEndIndex = '';
+ # Index value of bottom item in the list
+ $lastIndex = $this->mIsBackwards ?
+ $this->mHist[0]->getTimestamp() : $this->mHist[$numRows-1]->getTimestamp();
+ # Display range
+ $this->mRange = array( 0, $numRows-1 );
+ }
+ } else {
+ $firstIndex = '';
+ $lastIndex = '';
+ $this->mPastTheEndIndex = '';
+ }
+ if( $this->mIsBackwards ) {
+ $this->mIsFirst = ( $numRows < $queryLimit );
+ $this->mIsLast = ( $this->mOffset == '' );
+ $this->mLastShown = $firstIndex;
+ $this->mFirstShown = $lastIndex;
+ } else {
+ $this->mIsFirst = ( $this->mOffset == '' );
+ $this->mIsLast = ( $numRows < $queryLimit );
+ $this->mLastShown = $lastIndex;
+ $this->mFirstShown = $firstIndex;
+ }
+ $this->mQueryDone = true;
+ }
+}