User:yair Rand Commenthelper.js

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This code will be executed when previewing this page.

Documentation for this user script can be added at User:Yair rand/CommentHelper.

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if (

  // user is currently editing the page

   'edit', 'submit' ].indexOf( mw.config.get( 'wgAction' ) ) !== -1 &&

  (

    mw.config.get( 'wgNamespaceNumber' ) & 1 || // is a talk namespace or...

    // is other namespace that uses signatures sometimes (eg project)

    mw.config.get( 'wgExtraSignatureNamespaces' ).indexOf( mw.config.get( 'wgNamespaceNumber' ) ) !== -1

  )

) {

  $( function () {

    $( '#wpTextbox1' ).on( 'keydown', function ( e ) {

      // Check if key pressed was enter key.

      if ( e.which === 13 ) {

        var s = this.selectionStart,

          caretIsAtEndOfLine = this.value s  === '\n' || s === this.value.length,

          isAfterSig = caretIsAtEndOfLine && this.value.substr( s - 6, 6 ) === ' (UTC)', // TODO: Actually check things reliably.

          startPriorLine = this.value.lastIndexOf( '\n', s - 1 ) + 1,

          priorComment = this.value.substr( startPriorLine, s - startPriorLine ),

          startIndent = priorComment.match( /^[:*]*/ )[ 0 ],

          noHighlight = s === this.selectionEnd;

        

        if ( noHighlight && ( isAfterSig || startIndent ) ) {

          var preToInsert = '\n' + startIndent + ( isAfterSig ? ': ' : ' ' ),

            highlightedText = isAfterSig ? 'Add your comment here' : '',

            afterText = isAfterSig ? ' --~~' + '~~' : '';

          this.value = this.value.substr( 0, s ) + preToInsert + highlightedText + afterText + this.value.substr( s );

          this.selectionStart = s + preToInsert.length;

          this.selectionEnd = this.selectionStart + highlightedText.length;

          e.preventDefault();

          return false;

        }

      }

    } );

  } );

}