/**
 * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */

( function() {
	var eventNameList = [ 'click', 'keydown', 'mousedown', 'keypress', 'mouseover', 'mouseout' ];

	// Inline event callbacks assigned via innerHTML/outerHTML, such as
	// onclick/onmouseover, are ignored in AIR.
	// Use DOM2 event listeners to substitue inline handlers instead.
	function convertInlineHandlers( container ) {
		// TODO: document.querySelectorAll is not supported in AIR.
		var children = container.getElementsByTag( '*' ),
			count = children.count(),
			child;

		for ( var i = 0; i < count; i++ ) {
			child = children.getItem( i );

			( function( node ) {
				for ( var j = 0; j < eventNameList.length; j++ ) {
					( function( eventName ) {
						var inlineEventHandler = node.getAttribute( 'on' + eventName );
						if ( node.hasAttribute( 'on' + eventName ) ) {
							node.removeAttribute( 'on' + eventName );
							node.on( eventName, function( evt ) {
								var callFunc = /(return\s*)?CKEDITOR\.tools\.callFunction\(([^)]+)\)/.exec( inlineEventHandler ),
									hasReturn = callFunc && callFunc[ 1 ],
									callFuncArgs = callFunc && callFunc[ 2 ].split( ',' ),
									preventDefault = /return false;/.test( inlineEventHandler );

								if ( callFuncArgs ) {
									var nums = callFuncArgs.length,
										argName;

									for ( var i = 0; i < nums; i++ ) {
										// Trim spaces around param.
										callFuncArgs[ i ] = argName = CKEDITOR.tools.trim( callFuncArgs[ i ] );

										// String form param.
										var strPattern = argName.match( /^(["'])([^"']*?)\1$/ );
										if ( strPattern ) {
											callFuncArgs[ i ] = strPattern[ 2 ];
											continue;
										}

										// Integer form param.
										if ( argName.match( /\d+/ ) ) {
											callFuncArgs[ i ] = parseInt( argName, 10 );
											continue;
										}

										// Speical variables.
										switch ( argName ) {
											case 'this':
												callFuncArgs[ i ] = node.$;
												break;
											case 'event':
												callFuncArgs[ i ] = evt.data.$;
												break;
											case 'null':
												callFuncArgs[ i ] = null;
												break;
										}
									}

									var retval = CKEDITOR.tools.callFunction.apply( window, callFuncArgs );
									if ( hasReturn && retval === false )
										preventDefault = 1;
								}

								if ( preventDefault )
									evt.data.preventDefault();
							} );
						}
					} )( eventNameList[ j ] );
				}
			} )( child );
		}
	}

	CKEDITOR.plugins.add( 'adobeair', {
		onLoad: function() {
			if ( !CKEDITOR.env.air )
				return;

			CKEDITOR.dom.document.prototype.write = CKEDITOR.tools.override( CKEDITOR.dom.document.prototype.write, function( original_write ) {
				function appendElement( parent, tagName, fullTag, text ) {
					var node = parent.append( tagName ),
						attrs = CKEDITOR.htmlParser.fragment.fromHtml( fullTag ).children[ 0 ].attributes;
					attrs && node.setAttributes( attrs );
					text && node.append( parent.getDocument().createText( text ) );
				}

				return function( html ) {
					// document.write() or document.writeln() fail silently after
					// the page load event in Adobe AIR.
					// DOM manipulation could be used instead.
					if ( this.getBody() ) {
						// We're taking the below extra work only because innerHTML
						// on <html> element doesn't work as expected.
						var doc = this,
							head = this.getHead();

						// Create style nodes for inline css. ( <style> content doesn't applied when setting via innerHTML )
						html = html.replace( /(<style[^>]*>)([\s\S]*?)<\/style>/gi, function( match, startTag, styleText ) {
							appendElement( head, 'style', startTag, styleText );
							return '';
						} );

						html = html.replace( /<base\b[^>]*\/>/i, function( match ) {
							appendElement( head, 'base', match );
							return '';
						} );

						html = html.replace( /<title>([\s\S]*)<\/title>/i, function( match, title ) {
							doc.$.title = title;
							return '';
						} );

						// Move the rest of head stuff.
						html = html.replace( /<head>([\s\S]*)<\/head>/i, function( headHtml ) {
							// Inject the <head> HTML inside a <div>.
							// Do that before getDocumentHead because WebKit moves
							// <link css> elements to the <head> at this point.
							var div = new CKEDITOR.dom.element( 'div', doc );
							div.setHtml( headHtml );
							// Move the <div> nodes to <head>.
							div.moveChildren( head );
							return '';
						} );

						html.replace( /(<body[^>]*>)([\s\S]*)(?=$|<\/body>)/i, function( match, startTag, innerHTML ) {
							doc.getBody().setHtml( innerHTML );
							var attrs = CKEDITOR.htmlParser.fragment.fromHtml( startTag ).children[ 0 ].attributes;
							attrs && doc.getBody().setAttributes( attrs );
						} );
					} else {
						original_write.apply( this, arguments );
					}
				};
			} );

			// Body doesn't get default margin on AIR.
			CKEDITOR.addCss( 'body.cke_editable { padding: 8px }' );
			CKEDITOR.ui.on( 'ready', function( evt ) {
				var ui = evt.data;
				// richcombo, panelbutton and menu
				if ( ui._.panel ) {
					var panel = ui._.panel._.panel,
						holder;

					( function() {
						// Adding dom event listeners off-line are not supported in AIR,
						// waiting for panel iframe loaded.
						if ( !panel.isLoaded ) {
							setTimeout( arguments.callee, 30 );
							return;
						}
						holder = panel._.holder;
						convertInlineHandlers( holder );
					} )();
				} else if ( ui instanceof CKEDITOR.dialog ) {
					convertInlineHandlers( ui._.element );
				}
			} );
		},
		init: function( editor ) {
			if ( !CKEDITOR.env.air )
				return;

			editor.on( 'uiReady', function() {
				convertInlineHandlers( editor.container );

				editor.on( 'elementsPathUpdate', function( evt ) {
					convertInlineHandlers( evt.data.space );
				} );
			} );

			editor.on( 'contentDom', function() {
				// Hyperlinks are enabled in editable documents in Adobe
				// AIR. Prevent their click behavior.
				editor.document.on( 'click', function( ev ) {
					ev.data.preventDefault( true );
				} );
			} );
		}
	} );
} )();
