1 files changed, 51 insertions, 0 deletions
diff --git a/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.js b/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.js
new file mode 100644
index 00000000..a85e740a
--- /dev/null
+++ b/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.js
@@ -0,0 +1,51 @@
+/*!
+ * Scripts for action=edit at domready
+ */
+( function ( mw, $ ) {
+	'use strict';
+
+	/**
+	 * Fired when the editform is added to the edit page
+	 *
+	 * Similar to the {@link mw.hook#event-wikipage_content wikipage.content hook}
+	 * $editForm can still be detached when this hook is fired.
+	 *
+	 * @event wikipage_editform
+	 * @member mw.hook
+	 * @param {jQuery} $editForm The most appropriate element containing the
+	 *   editform, usually #editform.
+	 */
+
+	$( function () {
+		var editBox, scrollTop, $editForm,
+			summaryCodePointLimit = mw.config.get( 'wgCommentCodePointLimit' ),
+			summaryByteLimit = mw.config.get( 'wgCommentByteLimit' ),
+			wpSummary = OO.ui.infuse( $( '#wpSummaryWidget' ) );
+
+		// Show a byte-counter to users with how many bytes are left for their edit summary.
+		// TODO: This looks a bit weird, as there is no unit in the UI, just numbers; showing
+		// 'bytes' confused users in testing, and showing 'chars' would be a lie. See T42035.
+		// (Showing 'chars' is still confusing with the code point limit, since it's not obvious
+		// that e.g. combining diacritics or zero-width punctuation count as characters.)
+		if ( summaryCodePointLimit ) {
+			mw.widgets.visibleCodePointLimit( wpSummary, summaryCodePointLimit );
+		} else if ( summaryByteLimit ) {
+			mw.widgets.visibleByteLimit( wpSummary, summaryByteLimit );
+		}
+
+		// Restore the edit box scroll state following a preview operation,
+		// and set up a form submission handler to remember this state.
+		editBox = document.getElementById( 'wpTextbox1' );
+		scrollTop = document.getElementById( 'wpScrolltop' );
+		$editForm = $( '#editform' );
+		mw.hook( 'wikipage.editform' ).fire( $editForm );
+		if ( $editForm.length && editBox && scrollTop ) {
+			if ( scrollTop.value ) {
+				editBox.scrollTop = scrollTop.value;
+			}
+			$editForm.submit( function () {
+				scrollTop.value = editBox.scrollTop;
+			} );
+		}
+	} );
+}( mediaWiki, jQuery ) );