function getFileExtension(file) {
  	var parts = file.split('.');
  	return parts[parts.length - 1];
  }
  
  function setSyntaxMode(ext) {
  	// Loads the syntax mode files and tells the editor
  	var filetype = new Array();
  	// add file extensions like this: filetype["extension"] = "filetype":
  	filetype["h"] = "c_cpp";
  	filetype["c"] = "c_cpp";
  	filetype["clj"] = "clojure";
  	filetype["coffee"] = "coffee"; // coffescript can be compiled to javascript
  	filetype["coldfusion"] = "cfc";
  	filetype["cpp"] = "c_cpp";
  	filetype["cs"] = "csharp";
  	filetype["css"] = "css";
  	filetype["groovy"] = "groovy";
  	filetype["haxe"] = "hx";
  	filetype["htm"] = "html";
  	filetype["html"] = "html";

  	filetype["tt"] = "html";

  	filetype["java"] = "java";
  	filetype["js"] = "javascript";
  	filetype["jsm"] = "javascript";
  	filetype["json"] = "json";
  	filetype["latex"] = "latex";

  	filetype["tex"] = "latex";

  	filetype["less"] = "less";
  	filetype["ly"] = "latex";
  	filetype["ily"] = "latex";
  	filetype["lua"] = "lua";
  	filetype["markdown"] = "markdown";
  	filetype["md"] = "markdown";
  	filetype["mdown"] = "markdown";
  	filetype["mdwn"] = "markdown";
  	filetype["mkd"] = "markdown";
  	filetype["ml"] = "ocaml";
  	filetype["mli"] = "ocaml";
  	filetype["pl"] = "perl";
  	filetype["php"] = "php";
  	filetype["powershell"] = "ps1";
  	filetype["py"] = "python";
  	filetype["rb"] = "ruby";
  	filetype["scad"] = "scad"; // seems to be something like 3d model files printed with e.g. reprap
  	filetype["scala"] = "scala";
  	filetype["scss"] = "scss"; // "sassy css"
  	filetype["sh"] = "sh";
  	filetype["sql"] = "sql";
  	filetype["svg"] = "svg";
  	filetype["textile"] = "textile"; // related to markdown
  	filetype["xml"] = "xml";
  
  	if (filetype[ext] != null) {
  		// Then it must be in the array, so load the custom syntax mode
  		// Set the syntax mode
  		OC.addScript('files_texteditor', 'vendor/ace/src-noconflict/mode-' + filetype[ext], function () {
  			var SyntaxMode = ace.require("ace/mode/" + filetype[ext]).Mode;
  			window.aceEditor.getSession().setMode(new SyntaxMode());
  		});
  	}
  }
  
  function showControls(dir, filename, writeable) {
  	// Loads the control bar at the top.
  	OC.Breadcrumb.show(dir, filename, '#');
  	// Load the new toolbar.
  	var editorbarhtml = '<div id="editorcontrols" style="display: none;">';
  	if (writeable) {
  		editorbarhtml += '<button id="editor_save">' + t('files_texteditor', 'Save') + '</button>';
  	}
  	editorbarhtml += '<label for="editorseachval">' + t('files_texteditor', 'Search');
  	editorbarhtml += '</label><input type="text" name="editorsearchval" id="editorsearchval">';

  	editorbarhtml += '<button id="editor_close" class="icon-close svg"></button>';
  	editorbarhtml += '</div>';

  
  	$('#controls').append(editorbarhtml);
  	$('#editorcontrols').show();

  	if (!OC.Util.hasSVGSupport()) {
  		OC.Util.replaceSVG($('#editorcontrols'));
  	}

  }
  
  function bindControlEvents() {
  	$('#content').on('click', '#editor_save', doFileSave);
  	$('#content').on('click', '#editor_close', hideFileEditor);
  	$('#content').on('keyup', '#editorsearchval', doSearch);
  	$('#content').on('click', '#clearsearchbtn', resetSearch);
  	$('#content').on('click', '#nextsearchbtn', nextSearchResult);
  }
  
  // returns true or false if the editor is in view or not
  function editorIsShown() {
  	return is_editor_shown;
  }
  
  //resets the search
  function resetSearch() {
  	$('#editorsearchval').val('');
  	$('#nextsearchbtn').remove();
  	$('#clearsearchbtn').remove();
  	window.aceEditor.gotoLine(0);
  }
  
  // moves the cursor to the next search resukt
  function nextSearchResult() {
  	window.aceEditor.findNext();
  }
  // Performs the initial search
  function doSearch() {
  	// check if search box empty?
  	if ($('#editorsearchval').val() == '') {
  		// Hide clear button
  		window.aceEditor.gotoLine(0);
  		$('#nextsearchbtn').remove();
  		$('#clearsearchbtn').remove();
  	} else {
  		// New search
  		// Reset cursor
  		window.aceEditor.gotoLine(0);
  		// Do search
  		window.aceEditor.find($('#editorsearchval').val(), {
  			backwards: false,
  			wrap: false,
  			caseSensitive: false,
  			wholeWord: false,
  			regExp: false
  		});
  		// Show next and clear buttons
  		// check if already there
  		if ($('#nextsearchbtn').length == 0) {
  			var nextbtnhtml = '<button id="nextsearchbtn">' + t('files_texteditor', 'Next') + '</button>';
  			var clearbtnhtml = '<button id="clearsearchbtn">' + t('files_texteditor', 'Clear') + '</button>';
  			$('#editorsearchval').after(nextbtnhtml).after(clearbtnhtml);
  		}
  	}
  }
  
  // Tries to save the file.
  function doFileSave() {
  	if (editorIsShown()) {
  		// Changed contents?
  		if ($('#editor').attr('data-edited') == 'true') {

  			$('#editor').attr('data-edited', 'false');
  			$('#editor').attr('data-saving', 'true');

  			// Get file path
  			var path = $('#editor').attr('data-dir') + '/' + $('#editor').attr('data-filename');
  			// Get original mtime
  			var mtime = $('#editor').attr('data-mtime');
  			// Show saving spinner
  			$("#editor_save").die('click', doFileSave);
  			$('#save_result').remove();
  			$('#editor_save').text(t('files_texteditor', 'Saving...'));
  			// Get the data
  			var filecontents = window.aceEditor.getSession().getValue();
  			// Send the data
  			$.post(OC.filePath('files_texteditor', 'ajax', 'savefile.php'), { filecontents: filecontents, path: path, mtime: mtime }, function (jsondata) {
  				if (jsondata.status != 'success') {
  					// Save failed
  					$('#editor_save').text(t('files_texteditor', 'Save'));
  					$('#notification').html(t('files_texteditor', 'Failed to save file'));
  					$('#notification').fadeIn();

  					$('#editor').attr('data-edited', 'true');
  					$('#editor').attr('data-saving', 'false');

  				} else {
  					// Save OK
  					// Update mtime
  					$('#editor').attr('data-mtime', jsondata.data.mtime);
  					$('#editor_save').text(t('files_texteditor', 'Save'));

  					// Update titles

  					if($('#editor').attr('data-edited') != 'true') {
  						$('.crumb.last a').text($('#editor').attr('data-filename'));
  						document.title = $('#editor').attr('data-filename') + ' - ownCloud';
  					}
  					$('#editor').attr('data-saving', 'false');

  				}

  				$('#editor_save').live('click', doFileSave);

  			}, 'json');
  		}
  	}
  	giveEditorFocus();
  };
  
  // Gives the editor focus
  function giveEditorFocus() {
  	window.aceEditor.focus();
  };
  
  // Loads the file editor. Accepts two parameters, dir and filename.
  function showFileEditor(dir, filename) {
  	// Check if unsupported file format
  	if(FileActions.getCurrentMimeType() === 'text/rtf') {
  		// Download the file instead.
  		window.location = OC.filePath('files', 'ajax', 'download.php') + '?files=' + encodeURIComponent(filename) + '&dir=' + encodeURIComponent($('#dir').val());
  	} else {
  		if (!editorIsShown()) {
  			is_editor_shown = true;
  			// Delete any old editors
  			if ($('#notification').data('reopeneditor')) {
  				OC.Notification.hide();
  			}
  			$('#editor').remove();
  			// Loads the file editor and display it.
  			$('#content').append('<div id="editor_container"><div id="editor"></div></div>');

  
  			// bigger text for better readability
  			document.getElementById('editor').style.fontSize = '16px';

  			var data = $.getJSON(
  				OC.filePath('files_texteditor', 'ajax', 'loadfile.php'),
  				{file: filename, dir: dir},
  				function (result) {
  					if (result.status === 'success') {
  						// Save mtime
  						$('#editor').attr('data-mtime', result.data.mtime);
  						// Initialise the editor
  						if (window.FileList){
  							FileList.setViewerMode(true);
  							enableEditorUnsavedWarning(true);
  							$('#fileList').on('changeDirectory.texteditor', textEditorOnChangeDirectory);
  						}
  						// Show the control bar
  						showControls(dir, filename, result.data.writeable);
  						// Update document title
  						$('body').attr('old_title', document.title);
  						document.title = filename + ' - ownCloud';
  						$('#editor').text(result.data.filecontents);
  						$('#editor').attr('data-dir', dir);
  						$('#editor').attr('data-filename', filename);
  						$('#editor').attr('data-edited', 'false');
  						window.aceEditor = ace.edit("editor");
  						aceEditor.setShowPrintMargin(false);
  						aceEditor.getSession().setUseWrapMode(true);
  						if ( ! result.data.writeable ) {
  							aceEditor.setReadOnly(true);
  						}
  						if (result.data.mime && result.data.mime === 'text/html') {
  							setSyntaxMode('html');
  						} else {
  							setSyntaxMode(getFileExtension(filename));
  						}
  						OC.addScript('files_texteditor', 'vendor/ace/src-noconflict/theme-clouds', function () {
  							window.aceEditor.setTheme("ace/theme/clouds");
  						});
  						window.aceEditor.getSession().on('change', function () {
  							if ($('#editor').attr('data-edited') != 'true') {
  								$('#editor').attr('data-edited', 'true');

  								if($('#editor').attr('data-saving') != 'true') {
  									$('.crumb.last a').text($('.crumb.last a').text() + ' *');
  									document.title = $('#editor').attr('data-filename') + ' * - ownCloud';
  								}

  							}
  						});
  						// Add the ctrl+s event
  						window.aceEditor.commands.addCommand({
  							name: "save",
  							bindKey: {
  								win: "Ctrl-S",
  								mac: "Command-S",
  								sender: "editor"
  							},
  							exec: function () {

  								if(!$('#editor').attr('data-saving')){
  									doFileSave();
  								}

  							}
  						});
  						giveEditorFocus();
  					} else {
  						// Failed to get the file.
  						OC.dialogs.alert(result.data.message, t('files_texteditor', 'An error occurred!'));
  					}
  					// End success
  				}
  				// End ajax
  			);
  			return data;
  		}
  	}
  }
  
  function enableEditorUnsavedWarning(enable) {
  	$(window).unbind('beforeunload.texteditor');
  	if (enable) {
  		$(window).bind('beforeunload.texteditor', function () {
  			if ($('#editor').attr('data-edited') == 'true') {
  				return t('files_texteditor', 'There are unsaved changes in the text editor');
  			}
  		});
  	}
  }
  
  function textEditorOnChangeDirectory(ev){
  	// if the directory is changed, it is usually due to browser back
  	// navigation. In this case, simply close the editor
  	hideFileEditor();
  }
  
  // Fades out the editor.
  function hideFileEditor() {
  	$('#fileList').off('changeDirectory.texteditor');
  	enableEditorUnsavedWarning(false);
  	if (window.FileList){
  		// reload the directory content with the updated file size + thumbnail
  		// and also the breadcrumb
  		window.FileList.reload();
  	}
  	if ($('#editor').attr('data-edited') == 'true') {
  		// Hide, not remove
  		$('#editorcontrols,#editor_container').hide();
  		// Fade out editor
  		// Reset document title
  		document.title = $('body').attr('old_title');
  		FileList.setViewerMode(false);
  		$('#content table').show();
  		OC.Notification.show(t('files_texteditor', 'There were unsaved changes, click here to go back'));
  		$('#notification').data('reopeneditor', true);
  		is_editor_shown = false;
  	} else {
  		// Fade out editor
  		$('#editor_container, #editorcontrols').remove();
  		// Reset document title
  		document.title = $('body').attr('old_title');
  		FileList.setViewerMode(false);
  		$('#content table').show();
  		is_editor_shown = false;
  	}
  }
  
  // Reopens the last document
  function reopenEditor() {
  	FileList.setViewerMode(true);
  	enableEditorUnsavedWarning(true);
  	$('#fileList').on('changeDirectory.texteditor', textEditorOnChangeDirectory);
  	$('#controls .last').not('#breadcrumb_file').removeClass('last');
  	$('#editor_container').show();
  	$('#editorcontrols').show();
  	OC.Breadcrumb.show($('#editor').attr('data-dir'), $('#editor').attr('data-filename') + ' *', '#');
  	document.title = $('#editor').attr('data-filename') + ' * - ownCloud';
  	is_editor_shown = true;
  	giveEditorFocus();
  }
  
  var is_editor_shown = false;
  $(document).ready(function () {
  	if ($('#isPublic').val()){
  		// disable editor in public mode (not supported yet)
  		return;
  	}
  	if (typeof FileActions !== 'undefined') {
  		FileActions.register('text', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('text', 'Edit');
  		FileActions.register('application/xml', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/xml', 'Edit');
  		FileActions.register('application/x-empty', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/x-empty', 'Edit');
  		FileActions.register('inode/x-empty', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('inode/x-empty', 'Edit');
  		FileActions.register('application/x-php', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/x-php', 'Edit');
  		FileActions.register('application/javascript', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/javascript', 'Edit');
  		FileActions.register('application/x-pearl', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/x-pearl', 'Edit');

  		FileActions.register('application/x-tex', 'Edit', OC.PERMISSION_READ, '', function (filename) {
  			showFileEditor($('#dir').val(), filename);
  		});
  		FileActions.setDefault('application/x-tex', 'Edit');

  
  	}
  	
  	//legacy search result customization
  	OC.search.customResults.Text = function (row, item) {
  		var text = item.link.substr(item.link.indexOf('download') + 8);
  		var a = row.find('td.result a');
  		a.data('file', text);
  		a.attr('href', '#');
  		a.click(function () {
  			text = decodeURIComponent(text);
  			var pos = text.lastIndexOf('/');
  			var file = text.substr(pos + 1);
  			var dir = text.substr(0, pos);
  			showFileEditor(dir, file);
  		});
  	};
  	// customize file results when we can edit them
  	OC.search.customResults.file = function (row, item) {
  		var validFile = /(text\/*|application\/xml)/;
  		if (validFile.test(item.mime_type)) {
  			var a = row.find('td.result a');
  			a.data('file', item.name);
  			a.attr('href', '#');
  			a.click(function () {
  				showFileEditor(OC.dirname(item.path), item.name);
  			});
  		}
  	};
  	// Binds the file save and close editor events, and gotoline button
  	bindControlEvents();
  	$('#editor_container').remove();
  	$('#notification').click(function () {
  		if ($('#notification').data('reopeneditor')) {
  			reopenEditor();
  			OC.Notification.hide();
  		}
  	});
  });