/* global tinymce */

/**

 * WP Fullscreen (Distraction-Free Writing) TinyMCE plugin

 */

tinymce.PluginManager.add( 'wpfullscreen', function( editor ) {

	var settings = editor.settings;

	function fullscreenOn() {

		settings.wp_fullscreen = true;

		editor.dom.addClass( editor.getDoc().documentElement, 'wp-fullscreen' );

		// Start auto-resizing

		editor.execCommand( 'wpAutoResizeOn' );

	}

	function fullscreenOff() {

		settings.wp_fullscreen = false;

		editor.dom.removeClass( editor.getDoc().documentElement, 'wp-fullscreen' );

		// Stop auto-resizing

		editor.execCommand( 'wpAutoResizeOff' );

	}

	// For use from outside the editor.

	editor.addCommand( 'wpFullScreenOn', fullscreenOn );

	editor.addCommand( 'wpFullScreenOff', fullscreenOff );

	function getExtAPI() {

		return ( typeof wp !== 'undefined' && wp.editor && wp.editor.fullscreen );

	}

	// Toggle DFW mode. For use from inside the editor.

	function toggleFullscreen() {

		var fullscreen = getExtAPI();

		if ( fullscreen ) {

			if ( editor.getParam('wp_fullscreen') ) {

				fullscreen.off();

			} else {

				fullscreen.on();

			}

		}

	}

	editor.addCommand( 'wpFullScreen', toggleFullscreen );

	editor.on( 'keydown', function( event ) {

		var fullscreen;

		// Turn fullscreen off when Esc is pressed.

		if ( event.keyCode === 27 && ( fullscreen = getExtAPI() ) && fullscreen.settings.visible ) {

			fullscreen.off();

		}

	});

	editor.on( 'init', function() {

		// Set the editor when initializing from whitin DFW

		if ( editor.getParam('wp_fullscreen') ) {

			fullscreenOn();

		}

	});

	// Register buttons

	editor.addButton( 'wp_fullscreen', {

		tooltip: 'Distraction-free writing mode',

		shortcut: 'Alt+Shift+W',

		onclick: toggleFullscreen,

		classes: 'wp-fullscreen btn widget' // This overwrites all classes on the container!

	});

	editor.addMenuItem( 'wp_fullscreen', {

		text: 'Distraction-free writing mode',

		icon: 'wp_fullscreen',

		shortcut: 'Alt+Shift+W',

		context: 'view',

		onclick: toggleFullscreen

	});

});