Don't show tools on history view when no revisions can be shown

Change-Id: I31c1d22a444928bf73d7ae0c0904cd1fb93865f4

diff --git a/includes/actions/pagers/HistoryPager.php b/includes/actions/pagers/HistoryPager.php
index c9c1b51..bc456fe 100644 (file)
--- a/includes/actions/pagers/HistoryPager.php
+++ b/includes/actions/pagers/HistoryPager.php
@@ -185,34 +185,40 @@ class HistoryPager extends ReverseChronologicalPager {
                $s .= Html::hidden( 'type', 'revision' ) . "\n";
 
                // Button container stored in $this->buttons for re-use in getEndBody()
-               $this->buttons = Html::openElement( 'div', [ 'class' => 'mw-history-compareselectedversions' ] );
-               $className = 'historysubmit mw-history-compareselectedversions-button';
-               $attrs = [ 'class' => $className ]
-                       + Linker::tooltipAndAccesskeyAttribs( 'compareselectedversions' );
-               $this->buttons .= $this->submitButton( $this->msg( 'compareselectedversions' )->text(),
-                       $attrs
-               ) . "\n";
-
-               $user = $this->getUser();
-               $actionButtons = '';
-               if ( $user->isAllowed( 'deleterevision' ) ) {
-                       $actionButtons .= $this->getRevisionButton( 'revisiondelete', 'showhideselectedversions' );
-               }
-               if ( $this->showTagEditUI ) {
-                       $actionButtons .= $this->getRevisionButton( 'editchangetags', 'history-edit-tags' );
-               }
-               if ( $actionButtons ) {
-                       $this->buttons .= Xml::tags( 'div', [ 'class' =>
-                               'mw-history-revisionactions' ], $actionButtons );
-               }
+               $this->buttons = '';
+               if ( $this->getNumRows() > 0 ) {
+                       $this->buttons .= Html::openElement(
+                               'div', [ 'class' => 'mw-history-compareselectedversions' ] );
+                       $className = 'historysubmit mw-history-compareselectedversions-button';
+                       $attrs = [ 'class' => $className ]
+                               + Linker::tooltipAndAccesskeyAttribs( 'compareselectedversions' );
+                       $this->buttons .= $this->submitButton( $this->msg( 'compareselectedversions' )->text(),
+                               $attrs
+                       ) . "\n";
+
+                       $user = $this->getUser();
+                       $actionButtons = '';
+                       if ( $user->isAllowed( 'deleterevision' ) ) {
+                               $actionButtons .= $this->getRevisionButton(
+                                       'revisiondelete', 'showhideselectedversions' );
+                       }
+                       if ( $this->showTagEditUI ) {
+                               $actionButtons .= $this->getRevisionButton(
+                                       'editchangetags', 'history-edit-tags' );
+                       }
+                       if ( $actionButtons ) {
+                               $this->buttons .= Xml::tags( 'div', [ 'class' =>
+                                       'mw-history-revisionactions' ], $actionButtons );
+                       }
 
-               if ( $user->isAllowed( 'deleterevision' ) || $this->showTagEditUI ) {
-                       $this->buttons .= ( new ListToggle( $this->getOutput() ) )->getHTML();
-               }
+                       if ( $user->isAllowed( 'deleterevision' ) || $this->showTagEditUI ) {
+                               $this->buttons .= ( new ListToggle( $this->getOutput() ) )->getHTML();
+                       }
 
-               $this->buttons .= '</div>';
+                       $this->buttons .= '</div>';
 
-               $s .= $this->buttons;
+                       $s .= $this->buttons;
+               }
                $s .= '<ul id="pagehistory">' . "\n";
 
                return $s;