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this;Object.keys(this.screens).forEach(function(path){if(path===_this4.activePath)_this4.activeScreen.clearCache();else if(!(_this4.isNavigationPending&&_this4.pendingNavigate.path===path))_this4.removeScreen(path)})}},{key:"createScreenInstance",value:function createScreenInstance(path,route){if(!this.pendingNavigate&&path===this.activePath)return this.activeScreen;var screen=this.screens[path];if(!screen){var handler=route.getHandler();if(handler===_Screen2.default||_Screen2.default.isImplementedBy(handler.prototype))screen=
new handler;else screen=handler(route)||new _Screen2.default}return screen}},{key:"disposeInternal",value:function disposeInternal(){if(this.activeScreen)this.removeScreen(this.activePath);this.clearScreensCache();this.formEventHandler_.removeListener();this.linkEventHandler_.removeListener();this.appEventHandlers_.removeAllListeners();_get(App.prototype.__proto__||Object.getPrototypeOf(App.prototype),"disposeInternal",this).call(this)}},{key:"dispatch",value:function dispatch(){return this.navigate(_utils2.default.getCurrentBrowserPath(),
true)}},{key:"doNavigate_",value:function doNavigate_(path,opt_replaceHistory){var _this5=this;var route=this.findRoute(path);if(!route){this.pendingNavigate=_metalPromise2.default.reject(new _metalPromise2.default.CancellationError("No route for "+path));return this.pendingNavigate}this.stopPendingNavigate_();this.isNavigationPending=true;var nextScreen=this.createScreenInstance(path,route);return this.maybePreventDeactivate_().then(function(){return _this5.maybePreventActivate_(nextScreen)}).then(function(){return nextScreen.load(path)}).then(function(){_this5.navigationStrategy=
NavigationStrategy.SCHEDULE_LAST;if(_this5.activeScreen)_this5.activeScreen.deactivate();_this5.prepareNavigateHistory_(path,nextScreen,opt_replaceHistory);_this5.prepareNavigateSurfaces_(nextScreen,_this5.surfaces,_this5.extractParams(route,path))}).then(function(){return nextScreen.evaluateStyles(_this5.surfaces)}).then(function(){return nextScreen.flip(_this5.surfaces)}).then(function(){return nextScreen.evaluateScripts(_this5.surfaces)}).then(function(){return _this5.maybeUpdateScrollPositionState_()}).then(function(){return _this5.syncScrollPositionSyncThenAsync_()}).then(function(){return _this5.finalizeNavigate_(path,
nextScreen)}).then(function(){return _this5.maybeOverloadBeforeUnload_()}).catch(function(reason){_this5.isNavigationPending=false;_this5.handleNavigateError_(path,nextScreen,reason);throw reason;}).thenAlways(function(){_this5.navigationStrategy=NavigationStrategy.IMMEDIATE;if(_this5.scheduledNavigationQueue.length){var scheduledNavigation=_this5.scheduledNavigationQueue.shift();_this5.maybeNavigate_(scheduledNavigation.href,scheduledNavigation)}})}},{key:"extractParams",value:function extractParams(route,
path){return route.extractParams(this.getRoutePath(path))}},{key:"finalizeNavigate_",value:function finalizeNavigate_(path,nextScreen){nextScreen.activate();if(this.activeScreen&&!this.activeScreen.isCacheable())if(this.activeScreen!==nextScreen)this.removeScreen(this.activePath);this.activePath=path;this.activeScreen=nextScreen;this.browserPathBeforeNavigate=_utils2.default.getCurrentBrowserPathWithoutHash();this.screens[path]=nextScreen;this.isNavigationPending=false;this.pendingNavigate=null;_globals2.default.capturedFormElement=
null;_globals2.default.capturedFormButtonElement=null}},{key:"findRoute",value:function findRoute(path){path=this.getRoutePath(path);for(var i=0;i<this.routes.length;i++){var route=this.routes[i];if(route.matchesPath(path))return route}return null}},{key:"getAllowPreventNavigate",value:function getAllowPreventNavigate(){return this.allowPreventNavigate}},{key:"getBasePath",value:function getBasePath(){return this.basePath}},{key:"getDefaultTitle",value:function getDefaultTitle(){return this.defaultTitle}},
{key:"getFormSelector",value:function getFormSelector(){return this.formSelector}},{key:"getIgnoreQueryStringFromRoutePath",value:function getIgnoreQueryStringFromRoutePath(){return this.ignoreQueryStringFromRoutePath}},{key:"getLinkSelector",value:function getLinkSelector(){return this.linkSelector}},{key:"getLoadingCssClass",value:function getLoadingCssClass(){return this.loadingCssClass}},{key:"getRoutePath",value:function getRoutePath(path){if(this.getIgnoreQueryStringFromRoutePath()){path=_utils2.default.getUrlPathWithoutHashAndSearch(path);
return _utils2.default.getUrlPathWithoutHashAndSearch(path.substr(this.basePath.length))}path=_utils2.default.getUrlPathWithoutHash(path);return _utils2.default.getUrlPathWithoutHash(path.substr(this.basePath.length))}},{key:"getUpdateScrollPosition",value:function getUpdateScrollPosition(){return this.updateScrollPosition}},{key:"handleNavigateError_",value:function handleNavigateError_(path,nextScreen,error){var _this6=this;this.emit("navigationError",{error:error,nextScreen:nextScreen,path:path});
if(!_utils2.default.isCurrentBrowserPath(path))if(this.isNavigationPending&&this.pendingNavigate)this.pendingNavigate.thenAlways(function(){return _this6.removeScreen(path)},this);else this.removeScreen(path)}},{key:"hasRoutes",value:function hasRoutes(){return this.routes.length>0}},{key:"isLinkSameOrigin_",value:function isLinkSameOrigin_(host){var hostUri=new _metalUri2.default(host);var locationHostUri=new _metalUri2.default(_globals2.default.window.location.host);return hostUri.getPort()===locationHostUri.getPort()&&
hostUri.getHostname()===locationHostUri.getHostname()}},{key:"isSameBasePath_",value:function isSameBasePath_(path){return path.indexOf(this.basePath)===0}},{key:"lockHistoryScrollPosition_",value:function lockHistoryScrollPosition_(){var state=_globals2.default.window.history.state;if(!state)return;var winner=false;var switchScrollPositionRace=function switchScrollPositionRace(){_globals2.default.document.removeEventListener("scroll",switchScrollPositionRace,false);if(!winner){_globals2.default.window.scrollTo(state.scrollLeft,
state.scrollTop);winner=true}};_metal.async.nextTick(switchScrollPositionRace);_globals2.default.document.addEventListener("scroll",switchScrollPositionRace,false)}},{key:"maybeDisableNativeScrollRestoration",value:function maybeDisableNativeScrollRestoration(){if(this.nativeScrollRestorationSupported){this.nativeScrollRestoration_=_globals2.default.window.history.scrollRestoration;_globals2.default.window.history.scrollRestoration="manual"}}},{key:"maybeScheduleNavigation_",value:function maybeScheduleNavigation_(href,
event){if(this.isNavigationPending&&this.navigationStrategy===NavigationStrategy.SCHEDULE_LAST){this.scheduledNavigationQueue=[_metal.object.mixin({href:href,isScheduledNavigation:true},event)];return true}return false}},{key:"maybeNavigate_",value:function maybeNavigate_(href,event){if(!this.canNavigate(href))return;var isNavigationScheduled=this.maybeScheduleNavigation_(href,event);if(isNavigationScheduled){event.preventDefault();return}var navigateFailed=false;try{this.navigate(_utils2.default.getUrlPath(href),
false,event)}catch(err){navigateFailed=true}if(!navigateFailed&&!event.isScheduledNavigation)event.preventDefault()}},{key:"maybeOverloadBeforeUnload_",value:function maybeOverloadBeforeUnload_(){var _this7=this;if("function"===typeof window.onbeforeunload){window._onbeforeunload=window.onbeforeunload;window.onbeforeunload=function(event){_this7.emit("beforeUnload",event);if(event&&event.defaultPrevented)return true};window.onbeforeunload._overloaded=true}}},{key:"maybePreventActivate_",value:function maybePreventActivate_(nextScreen){var _this8=
this;return _metalPromise2.default.resolve().then(function(){return nextScreen.beforeActivate()}).then(function(prevent){if(prevent){_this8.pendingNavigate=_metalPromise2.default.reject(new _metalPromise2.default.CancellationError("Cancelled by next screen"));return _this8.pendingNavigate}})}},{key:"maybePreventDeactivate_",value:function maybePreventDeactivate_(){var _this9=this;return _metalPromise2.default.resolve().then(function(){if(_this9.activeScreen)return _this9.activeScreen.beforeDeactivate()}).then(function(prevent){if(prevent){_this9.pendingNavigate=
_metalPromise2.default.reject(new _metalPromise2.default.CancellationError("Cancelled by active screen"));return _this9.pendingNavigate}})}},{key:"maybeRepositionScrollToHashedAnchor",value:function maybeRepositionScrollToHashedAnchor(){var hash=_globals2.default.window.location.hash;if(hash){var anchorElement=_globals2.default.document.getElementById(hash.substring(1));if(anchorElement){var _utils$getNodeOffset=_utils2.default.getNodeOffset(anchorElement),offsetLeft=_utils$getNodeOffset.offsetLeft,
offsetTop=_utils$getNodeOffset.offsetTop;_globals2.default.window.scrollTo(offsetLeft,offsetTop)}}}},{key:"maybeRestoreNativeScrollRestoration",value:function maybeRestoreNativeScrollRestoration(){if(this.nativeScrollRestorationSupported&&this.nativeScrollRestoration_)_globals2.default.window.history.scrollRestoration=this.nativeScrollRestoration_}},{key:"maybeRestoreRedirectPathHash_",value:function maybeRestoreRedirectPathHash_(path,redirectPath,hash){if(redirectPath===_utils2.default.getUrlPathWithoutHash(path))return redirectPath+
hash;return redirectPath}},{key:"maybeUpdateScrollPositionState_",value:function maybeUpdateScrollPositionState_(){var hash=_globals2.default.window.location.hash;var anchorElement=_globals2.default.document.getElementById(hash.substring(1));if(anchorElement){var _utils$getNodeOffset2=_utils2.default.getNodeOffset(anchorElement),offsetLeft=_utils$getNodeOffset2.offsetLeft,offsetTop=_utils$getNodeOffset2.offsetTop;this.saveHistoryCurrentPageScrollPosition_(offsetTop,offsetLeft)}}},{key:"navigate",
value:function navigate(path,opt_replaceHistory,opt_event){if(!_utils2.default.isHtml5HistorySupported())throw new Error("HTML5 History is not supported. Senna will not intercept navigation.");if(opt_event){_globals2.default.capturedFormElement=opt_event.capturedFormElement;_globals2.default.capturedFormButtonElement=opt_event.capturedFormButtonElement}if(path===this.activePath)opt_replaceHistory=true;this.emit("beforeNavigate",{event:opt_event,path:path,replaceHistory:!!opt_replaceHistory});return this.pendingNavigate}},
{key:"onBeforeNavigate_",value:function onBeforeNavigate_(event){if(_globals2.default.capturedFormElement)event.form=_globals2.default.capturedFormElement}},{key:"onBeforeNavigateDefault_",value:function onBeforeNavigateDefault_(event){if(this.pendingNavigate)if(this.pendingNavigate.path===event.path||this.navigationStrategy===NavigationStrategy.SCHEDULE_LAST)return;this.emit("beforeUnload",event);this.emit("startNavigate",{form:event.form,path:event.path,replaceHistory:event.replaceHistory})}},{key:"onBeforeUnloadDefault_",
value:function onBeforeUnloadDefault_(event){var func=window._onbeforeunload;if(func&&!func._overloaded&&func())event.preventDefault()}},{key:"onDocClickDelegate_",value:function onDocClickDelegate_(event){if(event.altKey||event.ctrlKey||event.metaKey||event.shiftKey||event.button)return;this.maybeNavigate_(event.delegateTarget.href,event)}},{key:"onDocSubmitDelegate_",value:function onDocSubmitDelegate_(event){var form=event.delegateTarget;if(form.method==="get")return;event.capturedFormElement=
form;var buttonSelector="button:not([type]),button[type\x3dsubmit],input[type\x3dsubmit]";if((0,_metalDom.match)(_globals2.default.document.activeElement,buttonSelector))event.capturedFormButtonElement=_globals2.default.document.activeElement;else event.capturedFormButtonElement=form.querySelector(buttonSelector);this.maybeNavigate_(form.action,event)}},{key:"onLoad_",value:function onLoad_(){var _this10=this;this.skipLoadPopstate=true;setTimeout(function(){_this10.skipLoadPopstate=false},0);this.maybeRepositionScrollToHashedAnchor()}},
{key:"onPopstate_",value:function onPopstate_(event){if(this.skipLoadPopstate)return;if(_utils2.default.isCurrentBrowserPath(this.browserPathBeforeNavigate)){this.maybeRepositionScrollToHashedAnchor();return}var state=event.state;if(!state){if(_globals2.default.window.location.hash){if(this.redirectPath&&!_utils2.default.isCurrentBrowserPath(this.redirectPath))this.reloadPage();this.maybeRepositionScrollToHashedAnchor()}else this.reloadPage();return}if(state.senna){this.popstateScrollTop=state.scrollTop;
this.popstateScrollLeft=state.scrollLeft;if(!this.nativeScrollRestorationSupported)this.lockHistoryScrollPosition_();this.once("endNavigate",function(){if(state.referrer)_utils2.default.setReferrer(state.referrer)});var uri=new _metalUri2.default(state.path);uri.setHostname(_globals2.default.window.location.hostname);uri.setPort(_globals2.default.window.location.port);var isNavigationScheduled=this.maybeScheduleNavigation_(uri.toString(),{});if(isNavigationScheduled)return;this.navigate(state.path,
true)}}},{key:"onScroll_",value:function onScroll_(){if(this.captureScrollPositionFromScrollEvent)this.saveHistoryCurrentPageScrollPosition_(_globals2.default.window.pageYOffset,_globals2.default.window.pageXOffset)}},{key:"onStartNavigate_",value:function onStartNavigate_(event){var _this11=this;this.maybeDisableNativeScrollRestoration();this.captureScrollPositionFromScrollEvent=false;(0,_metalDom.addClasses)(_globals2.default.document.documentElement,this.loadingCssClass);var endNavigatePayload=
{form:event.form,path:event.path};this.pendingNavigate=this.doNavigate_(event.path,event.replaceHistory).catch(function(reason){endNavigatePayload.error=reason;throw reason;}).thenAlways(function(){if(!_this11.pendingNavigate&&!_this11.scheduledNavigationQueue.length){(0,_metalDom.removeClasses)(_globals2.default.document.documentElement,_this11.loadingCssClass);_this11.maybeRestoreNativeScrollRestoration();_this11.captureScrollPositionFromScrollEvent=true}_this11.emit("endNavigate",endNavigatePayload)});
this.pendingNavigate.path=event.path}},{key:"prefetch",value:function prefetch(path){var _this12=this;var route=this.findRoute(path);if(!route)return _metalPromise2.default.reject(new _metalPromise2.default.CancellationError("No route for "+path));var nextScreen=this.createScreenInstance(path,route);return nextScreen.load(path).then(function(){return _this12.screens[path]=nextScreen}).catch(function(reason){_this12.handleNavigateError_(path,nextScreen,reason);throw reason;})}},{key:"prepareNavigateHistory_",
value:function prepareNavigateHistory_(path,nextScreen,opt_replaceHistory){var title=nextScreen.getTitle();if(!(0,_metal.isString)(title))title=this.getDefaultTitle();var redirectPath=nextScreen.beforeUpdateHistoryPath(path);var historyState={form:(0,_metal.isDefAndNotNull)(_globals2.default.capturedFormElement),path:path,redirectPath:redirectPath,scrollLeft:0,scrollTop:0,senna:true};if(opt_replaceHistory){historyState.scrollTop=this.popstateScrollTop;historyState.scrollLeft=this.popstateScrollLeft}var hash=
(new _metalUri2.default(path)).getHash();redirectPath=this.maybeRestoreRedirectPathHash_(path,redirectPath,hash);this.updateHistory_(title,redirectPath,nextScreen.beforeUpdateHistoryState(historyState),opt_replaceHistory);this.redirectPath=redirectPath}},{key:"prepareNavigateSurfaces_",value:function prepareNavigateSurfaces_(nextScreen,surfaces,params){Object.keys(surfaces).forEach(function(id){var surfaceContent=nextScreen.getSurfaceContent(id,params);surfaces[id].addContent(nextScreen.getId(),surfaceContent)})}},
{key:"reloadPage",value:function reloadPage(){_globals2.default.window.location.reload()}},{key:"removeRoute",value:function removeRoute(route){return _metal.array.remove(this.routes,route)}},{key:"removeScreen",value:function removeScreen(path){var _this13=this;var screen=this.screens[path];if(screen){Object.keys(this.surfaces).forEach(function(surfaceId){return _this13.surfaces[surfaceId].remove(screen.getId())});screen.dispose();delete this.screens[path]}}},{key:"saveHistoryCurrentPageScrollPosition_",
value:function saveHistoryCurrentPageScrollPosition_(scrollTop,scrollLeft){var state=_globals2.default.window.history.state;if(state&&state.senna){var _ref=[scrollTop,scrollLeft];state.scrollTop=_ref[0];state.scrollLeft=_ref[1];_globals2.default.window.history.replaceState(state,null,null)}}},{key:"setAllowPreventNavigate",value:function setAllowPreventNavigate(allowPreventNavigate){this.allowPreventNavigate=allowPreventNavigate}},{key:"setBasePath",value:function setBasePath(basePath){this.basePath=
_utils2.default.removePathTrailingSlash(basePath)}},{key:"setDefaultTitle",value:function setDefaultTitle(defaultTitle){this.defaultTitle=defaultTitle}},{key:"setFormSelector",value:function setFormSelector(formSelector){this.formSelector=formSelector;if(this.formEventHandler_)this.formEventHandler_.removeListener();this.formEventHandler_=(0,_metalDom.delegate)(document,"submit",this.formSelector,this.onDocSubmitDelegate_.bind(this),this.allowPreventNavigate)}},{key:"setIgnoreQueryStringFromRoutePath",
value:function setIgnoreQueryStringFromRoutePath(ignoreQueryStringFromRoutePath){this.ignoreQueryStringFromRoutePath=ignoreQueryStringFromRoutePath}},{key:"setLinkSelector",value:function setLinkSelector(linkSelector){this.linkSelector=linkSelector;if(this.linkEventHandler_)this.linkEventHandler_.removeListener();this.linkEventHandler_=(0,_metalDom.delegate)(document,"click",this.linkSelector,this.onDocClickDelegate_.bind(this),this.allowPreventNavigate)}},{key:"setLoadingCssClass",value:function setLoadingCssClass(loadingCssClass){this.loadingCssClass=
loadingCssClass}},{key:"setUpdateScrollPosition",value:function setUpdateScrollPosition(updateScrollPosition){this.updateScrollPosition=updateScrollPosition}},{key:"stopPendingNavigate_",value:function stopPendingNavigate_(){if(this.pendingNavigate)this.pendingNavigate.cancel("Cancel pending navigation");this.pendingNavigate=null}},{key:"syncScrollPositionSyncThenAsync_",value:function syncScrollPositionSyncThenAsync_(){var _this14=this;var state=_globals2.default.window.history.state;if(!state)return;
var scrollTop=state.scrollTop;var scrollLeft=state.scrollLeft;var sync=function sync(){if(_this14.updateScrollPosition)_globals2.default.window.scrollTo(scrollLeft,scrollTop)};return new _metalPromise2.default(function(resolve){return sync()&_metal.async.nextTick(function(){return sync()&resolve()})})}},{key:"updateHistory_",value:function updateHistory_(title,path,state,opt_replaceHistory){var referrer=_globals2.default.window.location.href;if(state)state.referrer=referrer;if(opt_replaceHistory)_globals2.default.window.history.replaceState(state,
title,path);else _globals2.default.window.history.pushState(state,title,path);_utils2.default.setReferrer(referrer);var titleNode=_globals2.default.document.querySelector("title");if(titleNode)titleNode.innerHTML=title;else _globals2.default.document.title=title}}]);return App}(_metalEvents.EventEmitter);exports.default=App});