text: /*\
  title: $:/core/modules/startup.js
  type: application/javascript
  module-type: startup
  
  Miscellaneous startup logic for both the client and server.
  
  \*/
  (function(){
  
  /*jslint node: true, browser: true */
  /*global $tw: false */
  "use strict";
  
  // Export name and synchronous status
  exports.name = "startup";
  exports.after = ["load-modules"];
  exports.synchronous = true;
  
  // Set to `true` to enable performance instrumentation
  var PERFORMANCE_INSTRUMENTATION_CONFIG_TITLE = "$:/config/Performance/Instrumentation";
  
  var widget = require("$:/core/modules/widgets/widget.js");
  
  exports.startup = function() {
  	var modules,n,m,f;
  	// Minimal browser detection
  	if($tw.browser) {
  		$tw.browser.isIE = (/msie|trident/i.test(navigator.userAgent));
  		$tw.browser.isFirefox = !!document.mozFullScreenEnabled;
  	}
  	// Platform detection
  	$tw.platform = {};
  	if($tw.browser) {
  		$tw.platform.isMac = /Mac/.test(navigator.platform);
  		$tw.platform.isWindows = /win/i.test(navigator.platform);
  		$tw.platform.isLinux = /Linux/i.test(navigator.appVersion);
  	} else {
  		switch(require("os").platform()) {
  			case "darwin":
  				$tw.platform.isMac = true;
  				break;
  			case "win32":
  				$tw.platform.isWindows = true;
  				break;
  			case "freebsd":
  				$tw.platform.isLinux = true;
  				break;
  			case "linux":
  				$tw.platform.isLinux = true;
  				break;
  		}
  	}
  	// Initialise version
  	$tw.version = $tw.utils.extractVersionInfo();
  	// Set up the performance framework
  	$tw.perf = new $tw.Performance($tw.wiki.getTiddlerText(PERFORMANCE_INSTRUMENTATION_CONFIG_TITLE,"no") === "yes");
  	// Kick off the language manager and switcher
  	$tw.language = new $tw.Language();
  	$tw.languageSwitcher = new $tw.PluginSwitcher({
  		wiki: $tw.wiki,
  		pluginType: "language",
  		controllerTitle: "$:/language",
  		defaultPlugins: [
  			"$:/languages/en-US"
  		],
  		onSwitch: function(plugins) {
  			if($tw.browser) {
  				var pluginTiddler = $tw.wiki.getTiddler(plugins[0]);
  				if(pluginTiddler) {
  					document.documentElement.setAttribute("dir",pluginTiddler.getFieldString("text-direction") || "auto");
  				} else {
  					document.documentElement.removeAttribute("dir");
  				}
  			}
  		}
  	});
  	// Kick off the theme manager
  	$tw.themeManager = new $tw.PluginSwitcher({
  		wiki: $tw.wiki,
  		pluginType: "theme",
  		controllerTitle: "$:/theme",
  		defaultPlugins: [
  			"$:/themes/tiddlywiki/snowwhite",
  			"$:/themes/tiddlywiki/vanilla"
  		]
  	});
  	// Kick off the keyboard manager
  	$tw.keyboardManager = new $tw.KeyboardManager();
  	// Listen for shortcuts
  	if($tw.browser) {
  		$tw.utils.addEventListeners(document,[{
  			name: "keydown",
  			handlerObject: $tw.keyboardManager,
  			handlerMethod: "handleKeydownEvent"
  		}]);
  	}
  	// Create a root widget for attaching event handlers. By using it as the parentWidget for another widget tree, one can reuse the event handlers
  	$tw.rootWidget = new widget.widget({
  		type: "widget",
  		children: []
  	},{
  		wiki: $tw.wiki,
  		document: $tw.browser ? document : $tw.fakeDocument
  	});
  	// Execute any startup actions
  	var executeStartupTiddlers = function(tag) {
  		$tw.utils.each($tw.wiki.filterTiddlers("[all[shadows+tiddlers]tag[" + tag + "]!has[draft.of]]"),function(title) {
  			$tw.rootWidget.invokeActionString($tw.wiki.getTiddlerText(title),$tw.rootWidget);
  		});
  	};
  	executeStartupTiddlers("$:/tags/StartupAction");
  	if($tw.browser) {
  		executeStartupTiddlers("$:/tags/StartupAction/Browser");		
  	}
  	if($tw.node) {
  		executeStartupTiddlers("$:/tags/StartupAction/Node");		
  	}
  	// Clear outstanding tiddler store change events to avoid an unnecessary refresh cycle at startup
  	$tw.wiki.clearTiddlerEventQueue();
  	// Find a working syncadaptor
  	$tw.syncadaptor = undefined;
  	$tw.modules.forEachModuleOfType("syncadaptor",function(title,module) {
  		if(!$tw.syncadaptor && module.adaptorClass) {
  			$tw.syncadaptor = new module.adaptorClass({wiki: $tw.wiki});
  		}
  	});
  	// Set up the syncer object if we've got a syncadaptor
  	if($tw.syncadaptor) {
  		$tw.syncer = new $tw.Syncer({wiki: $tw.wiki, syncadaptor: $tw.syncadaptor});
  	} 
  	// Setup the saver handler
  	$tw.saverHandler = new $tw.SaverHandler({wiki: $tw.wiki, dirtyTracking: !$tw.syncadaptor});
  	// Host-specific startup
  	if($tw.browser) {
  		// Install the popup manager
  		$tw.popup = new $tw.utils.Popup();
  		// Install the animator
  		$tw.anim = new $tw.utils.Animator();
  	}
  };
  
  })();
  