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

		var typing,

			env = tinymce.Env,

			ua = window.navigator.userAgent,

			isWin = ua.indexOf( 'Windows' ) > -1,

			isWin8 = ( function() {

				var match = ua.match( /Windows NT 6\.(\d)/ );

				if ( match && match[1] > 1 ) {

					return true;

				}

				return false;

			}());

			return;

		}

		function setImgAttr( image ) {

			image.className = 'emoji';

			image.setAttribute( 'data-mce-resize', 'false' );

			image.setAttribute( 'data-mce-placeholder', '1' );

			image.setAttribute( 'data-wp-emoji', '1' );

		}

		function replaceEmoji( node ) {

			var imgAttr = {

				'data-mce-resize': 'false',

				'data-mce-placeholder': '1',

				'data-wp-emoji': '1'

			};

			wp.emoji.parse( node, { imgAttr: imgAttr } );

		}

		// Test if the node text contains emoji char(s) and replace.

		function parseNode( node ) {

			var selection, bookmark;

			if ( node && window.twemoji && window.twemoji.test( node.textContent || node.innerText ) ) {

				if ( env.webkit ) {

					selection = editor.selection;

					bookmark = selection.getBookmark();

				}

				replaceEmoji( node );

				if ( env.webkit ) {

					selection.moveToBookmark( bookmark );

				}

			}

		}

		if ( isWin8 ) {

			// Windows 8+ emoji can be "typed" with the onscreen keyboard.

			// That triggers the normal keyboard events, but not the 'input' event.

			// Thankfully it sets keyCode 231 when the onscreen keyboard inserts any emoji.

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

				if ( event.keyCode === 231 ) {

					parseNode( editor.selection.getNode() );

				}

			} );

		} else if ( ! isWin ) {

			// In MacOS inserting emoji doesn't trigger the stanradr keyboard events.

			// Thankfully it triggers the 'input' event.

			// This works in Android and iOS as well.

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

				typing = ( event.type === 'keydown' );

			} );

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

				if ( typing ) {

					return;

				}

				parseNode( editor.selection.getNode() );

			});

		}

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

			var selection = editor.selection,

				node = selection.getNode();

			if ( window.twemoji && window.twemoji.test( node.textContent || node.innerText ) ) {

				replaceEmoji( node );

				// In IE all content in the editor is left selected after wp.emoji.parse()...

				// Collapse the selection to the beginning.

				if ( env.ie && env.ie < 9 && event.load && node && node.nodeName === 'BODY' ) {

					selection.collapse( true );

				}

			}

		} );

		// Convert Twemoji compatible pasted emoji replacement images into our format.

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

			if ( window.twemoji ) {

				tinymce.each( editor.dom.$( 'img.emoji', event.node ), function( image ) {

					if ( image.alt && window.twemoji.test( image.alt ) ) {

						setImgAttr( image );

					}

				});

			}

		});

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

			if ( event.content ) {

				event.content = event.content.replace( /<img[^>]+data-wp-emoji="[^>]+>/g, function( img ) {

					var alt = img.match( /alt="([^"]+)"/ );

					if ( alt && alt[1] ) {

						return alt[1];

					}

					return img;

				});

			}

		} );

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

			if ( event.target.nodeName === 'IMG' && editor.dom.getAttrib( event.target, 'data-wp-emoji' ) ) {

				event.preventDefault();

			}

		} );

	} );