1 files changed, 111 insertions, 0 deletions
diff --git a/resources/src/mediawiki.action/mediawiki.action.history.js b/resources/src/mediawiki.action/mediawiki.action.history.js
new file mode 100644
index 00000000..ac48c596
--- /dev/null
+++ b/resources/src/mediawiki.action/mediawiki.action.history.js
@@ -0,0 +1,111 @@
+/*!
+ * JavaScript for History action
+ */
+jQuery( function ( $ ) {
+	var	$historyCompareForm = $( '#mw-history-compare' ),
+		$historySubmitter,
+		$lis = $( '#pagehistory > li' );
+
+	/**
+	 * @ignore
+	 * @context {Element} input
+	 * @param e {jQuery.Event}
+	 */
+	function updateDiffRadios() {
+		var nextState = 'before',
+			$li,
+			$inputs,
+			$oldidRadio,
+			$diffRadio;
+
+		if ( !$lis.length ) {
+			return true;
+		}
+
+		$lis
+		.each( function () {
+			$li = $( this );
+			$inputs = $li.find( 'input[type="radio"]' );
+			$oldidRadio = $inputs.filter( '[name="oldid"]' ).eq( 0 );
+			$diffRadio = $inputs.filter( '[name="diff"]' ).eq( 0 );
+
+			$li.removeClass( 'selected between before after' );
+
+			if ( !$oldidRadio.length || !$diffRadio.length ) {
+				return true;
+			}
+
+			if ( $oldidRadio.prop( 'checked' ) ) {
+				$li.addClass( 'selected after' );
+				nextState = 'after';
+			} else if ( $diffRadio.prop( 'checked' ) ) {
+				$li.addClass( 'selected ' + nextState );
+				nextState = 'between';
+			} else {
+				// This list item has neither checked
+				// apply the appropriate class following the previous item.
+				$li.addClass( nextState );
+			}
+		} );
+
+		return true;
+	}
+
+	$lis.find( 'input[name="diff"], input[name="oldid"]' ).click( updateDiffRadios );
+
+	// Set initial state
+	updateDiffRadios();
+
+	// Prettify url output for HistoryAction submissions,
+	// to cover up action=historysubmit construction.
+
+	// Ideally we'd use e.target instead of $historySubmitter, but e.target points
+	// to the form element for submit actions, so.
+	$historyCompareForm.find( '.historysubmit' ).click( function () {
+		$historySubmitter = $( this );
+	} );
+
+	// On submit we clone the form element, remove unneeded fields in the clone
+	// that pollute the query parameter with stuff from the other "use case",
+	// and then submit the clone.
+	// Without the cloning we'd be changing the real form, which is slower, could make
+	// the page look broken for a second in slow browsers and might show the form broken
+	// again when coming back from a "next" page.
+	$historyCompareForm.submit( function ( e ) {
+		var	$copyForm, $copyRadios, $copyAction;
+
+		if ( $historySubmitter ) {
+			$copyForm = $historyCompareForm.clone();
+			$copyRadios = $copyForm.find( '#pagehistory > li' ).find( 'input[name="diff"], input[name="oldid"]' );
+			$copyAction = $copyForm.find( '> [name="action"]' );
+
+			// Remove action=historysubmit and ids[..]=..
+			if ( $historySubmitter.hasClass( 'mw-history-compareselectedversions-button' ) ) {
+				$copyAction.remove();
+				$copyForm.find( 'input[name^="ids["]:checked' ).prop( 'checked', false );
+
+			// Remove diff=&oldid=, change action=historysubmit to revisiondelete, remove revisiondelete
+			} else if ( $historySubmitter.hasClass( 'mw-history-revisiondelete-button' ) ) {
+				$copyRadios.remove();
+				$copyAction.val( $historySubmitter.attr( 'name' ) );
+				$copyForm.find( ':submit' ).remove();
+			}
+
+			// IE7 doesn't do submission from an off-DOM clone, so insert hidden into document first
+			// Also remove potentially conflicting id attributes that we don't need anyway
+			$copyForm
+				.css( 'display', 'none' )
+				.find( '[id]' )
+					.removeAttr( 'id' )
+				.end()
+				.insertAfter( $historyCompareForm )
+				.submit();
+
+			e.preventDefault();
+			return false; // Because the submit is special, return false as well.
+		}
+
+		// Continue natural browser handling other wise
+		return true;
+	} );
+} );