User:Timotheus Canens/displaymessage.js

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Documentation for this user script can be added at User:Timotheus Canens/displaymessage.

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/**
 * The old mw.util.jsMessage function before https://gerrit.wikimedia.org/r/#/c/17605/, which
 * introduced the silly auto-hide function. Also with the original styles.
 * Add a little box at the top of the screen to inform the user of
 * something, replacing any previous message.
 * Calling with no arguments, with an empty string or null will hide the message
 *
 * @param message {mixed} The DOM-element, jQuery object or HTML-string to be put inside the message box.
 * @param className {String} Used in adding a class; should be different for each call
 * to allow CSS/JS to hide different boxes. null = no class used.
 * @return {Boolean} True on success, false on failure.
 */
function displayMessage( message, className ){
	if ( !arguments.length || message === '' || message === null ) {
		$( '#display-message' ).empty().hide();
		return true; // Emptying and hiding message is intended behaviour, return true
	} else {
		// We special-case skin structures provided by the software. Skins that
		// choose to abandon or significantly modify our formatting can just define
		// an mw-js-message div to start with.
		var $messageDiv = $( '#display-message' );
		if ( !$messageDiv.length ) {
			$messageDiv = $( '<div id="display-message" style="margin:1em;padding:0.5em 2.5%;border:solid 1px var(--border-color-interactive, #ddd);background-color:var(--background-color-interactive, #fcfcfc);font-size: 0.8em"></div>' );
			if ( mw.util.$content.length ) {
				mw.util.$content.prepend( $messageDiv );
			} else {
				return false;
			}
		}
		if ( className ) {
			$messageDiv.prop( 'class', 'display-message-' + className );
		}
		if ( typeof message === 'object' ) {
			$messageDiv.empty();
			$messageDiv.append( message );
		} else {
			$messageDiv.html( message );
		}
		$messageDiv.slideDown();
		return true;
	}
}