protected async override Task ProcessResponseImplAsync(NavigationResponse response)
{
Guard.ArgumentNotNull(response, "response");
// we won't handle it the response, if it is not the active request!
if (!response.Request.Equals(base.ActiveNavigationRequest))
{
return;
}
// we check if the navigation was not successful we let the base class handle it
if (response.Status != ResponseStatus.Success)
{
await base.ProcessResponseImplAsync(response);
return;
}
// note_ we don't send this request to the base class, hereon
// we add to the journal the current page info
if (base.CurrentNavigationRequest != null)
{
if (_states.ContainsKey(base.CurrentNavigationRequest.RequestUrl))
{
_states[base.CurrentNavigationRequest.RequestUrl] = GetCurrentPageContentState();
}
else
{
_states.Add(base.CurrentNavigationRequest.RequestUrl, GetCurrentPageContentState());
base.NotifyPropertyChanged(() => CanPurgeJournal);
}
}
// we save our supporters and use them - note_ we need to save this to access later
CurrentNavigationLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationLifecycle>(response.Content);
CurrentNavigationViewLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationViewLifecycle>(response.Content);
CurrentNavigationStateSupporter = NavigationService.GetSupporter <ISupportNavigationState>(response.Content);
CurrentNavigationViewStateSupporter = NavigationService.GetSupporter <ISupportNavigationViewState>(response.Content);
// we save the url and the content
CurrentNavigationRequest = response.Request;
SetValue(ContentProperty, response.Content);
// if the content support navigation, we pass in the request/response merged parameters
if (this.CurrentNavigationLifecycleSupporter != null)
{
CurrentNavigationLifecycleSupporter.Initialize(response.ResponseParameters);
await CurrentNavigationLifecycleSupporter.InitializeAsync(response.ResponseParameters);
Title = CurrentNavigationLifecycleSupporter.Title ??
nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
else
{
Title = nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
// we get the page state manager and restore the state
if (CurrentNavigationStateSupporter != null)
{
// restore state, if we have a state
if (_states.ContainsKey(response.Request.RequestUrl))
{
CurrentNavigationStateSupporter.RestoreState(_states[response.Request.RequestUrl].State); // note_ with stored state
}
}
// if the content supports view state, and we are navigating back/forward
if (CurrentNavigationViewStateSupporter != null)
{
if (_states.ContainsKey(response.Request.RequestUrl))
{
CurrentNavigationViewStateSupporter.RestoreState(_states[response.Request.RequestUrl].VisualState); // note_ with stored state
}
}
// and raise the event navigation completed
OnNavigationCompleted(new NavigatedEventArgs(this, response.Request));
// and once we have set the transition state, then we call the view's initialize
if (CurrentNavigationViewLifecycleSupporter != null)
{
CurrentNavigationViewLifecycleSupporter.Initialize(response);
}
}
private PageContentState GetCurrentPageContentState()
{
// we check the page has a url
if (base.CurrentNavigationRequest == null)
{
return(null);
}
// we return the state
return(new PageContentState(this.Url, CurrentNavigationRequest != null ? CurrentNavigationRequest.SiteArea : null, this.Title,
(CurrentNavigationStateSupporter == null ? null : CurrentNavigationStateSupporter.SaveState()),
(CurrentNavigationViewStateSupporter == null) ? null : CurrentNavigationViewStateSupporter.SaveState()));
}
protected override async Task ProcessResponseImplAsync(NavigationResponse response)
{
Guard.ArgumentNotNull(response, "response");
// we won't handle it the response, if it is not the active request!
if (!response.Request.Equals(base.ActiveNavigationRequest))
{
return;
}
// we check if the navigation was successful or not
if (response.Status != ResponseStatus.Success)
{
// we raise navigation failed and return
await base.ProcessResponseImplAsync(response);
return;
}
// note_ we don't send this request to the base class, hereon
// we get the current page info, as in the current page before being navigated
var _currentPageInfo = GetCurrentPageContentState();
var _nextPageInfo = default(PageContentState);
// else as per the navigation mode we change the stacks
switch (response.Request.NavigationMode)
{
// we treat new and unknown alike
case NavigateMode.New:
case NavigateMode.Unknown:
// we check if we were to record
if (_currentPageInfo != null)
{
_backStack.Push(_currentPageInfo);
}
// we also clear the forward stack
_forwardStack.Clear();
// and we say history changed
RaiseHistoryChanged();
break;
case NavigateMode.Back:
if (CanNavigateBack)
{
// we push the current item into the forward stack
_forwardStack.Push(_currentPageInfo);
// we remove one item
_nextPageInfo = _backStack.Pop();
// and we say history changed
RaiseHistoryChanged();
}
break;
case NavigateMode.Forward:
// we push the current item into the back stack
_backStack.Push(_currentPageInfo);
// and we remove one item
_nextPageInfo = _forwardStack.Pop();
// and we say history changed and return
RaiseHistoryChanged();
break;
case NavigateMode.Refresh:
// we don't need to do anything here, as the history remains the same
_nextPageInfo = _currentPageInfo;
break;
}
// we save our supporters and use them - note_ we need to save this to access later
CurrentNavigationLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationLifecycle>(response.Content);
CurrentNavigationViewLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationViewLifecycle>(response.Content);
CurrentNavigationStateSupporter = NavigationService.GetSupporter <ISupportNavigationState>(response.Content);
CurrentNavigationViewStateSupporter = NavigationService.GetSupporter <ISupportNavigationViewState>(response.Content);
// we save the url and the content
CurrentNavigationRequest = response.Request;
SetValue(ContentProperty, response.Content);
// if the content support navigation, we pass in the request/response merged parameters
if (this.CurrentNavigationLifecycleSupporter != null)
{
CurrentNavigationLifecycleSupporter.Initialize(response.ResponseParameters);
await CurrentNavigationLifecycleSupporter.InitializeAsync(response.ResponseParameters);
Title = CurrentNavigationLifecycleSupporter?.Title ??
nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
else
{
Title = nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
// if the content supports state, and we are navigating back/forward
if (CurrentNavigationStateSupporter != null)
{
// if we are navigating back or forward, and we are to - also we treat the unknown state to be like a New navigation
if (response.Request.NavigationMode != NavigateMode.New) // && response.Request.NavigationMode != NavigateMode.Unknown)
{
CurrentNavigationStateSupporter.RestoreState(_nextPageInfo != null ? _nextPageInfo.State : null);
}
}
// if the content supports view state, and we are navigating back/forward
if (CurrentNavigationViewStateSupporter != null)
{
// if we are navigating back or forward, and we are to - also we treat the unknown state to be like a New navigation
if (response.Request.NavigationMode != NavigateMode.New)
{
CurrentNavigationViewStateSupporter.RestoreState(_nextPageInfo != null ? _nextPageInfo.VisualState : null);
}
}
// and raise the event navigation completed
OnNavigationCompleted(new NavigatedEventArgs(this, response.Request));
// and once we have set the transition state, then we call the view's initialize
if (CurrentNavigationViewLifecycleSupporter != null)
{
CurrentNavigationViewLifecycleSupporter.Initialize(response);
}
}
private PageContentState GetCurrentPageContentState()
{
// we check if an intermediate state is available
if (_intermediateState != null)
{
var _state = _intermediateState;
_intermediateState = null; // reset it
return(_state);
}
// we check the page has a url
if (string.IsNullOrEmpty(this.Url))
{
return(null);
}
// we also add
return(new PageContentState(this.Url, this.CurrentNavigationRequest != null ? this.CurrentNavigationRequest.SiteArea : null, this.Title,
(CurrentNavigationStateSupporter == null ? null : CurrentNavigationStateSupporter.SaveState()),
(CurrentNavigationViewStateSupporter == null) ? null : CurrentNavigationViewStateSupporter.SaveState()));
}
private PageContentState GetCurrentPageContentState()
{
// we check the page has a url
if (string.IsNullOrEmpty(this.Url))
{
return(null);
}
// we also add
return(new PageContentState(this.Url, CurrentNavigationRequest != null ? CurrentNavigationRequest.SiteArea : null, this.Title,
(CurrentNavigationStateSupporter == null ? null : CurrentNavigationStateSupporter.SaveState()),
(CurrentNavigationViewStateSupporter == null) ? null : CurrentNavigationViewStateSupporter.SaveState()));
}
protected async override Task ProcessResponseImplAsync(NavigationResponse response)
{
Guard.ArgumentNotNull(response, "response");
// we won't handle it the response, if it is not the active request!
if (!response.Request.Equals(base.ActiveNavigationRequest))
{
return;
}
// we check if the navigation was successful or not
if (response.Status != ResponseStatus.Success)
{
// we raise navigation failed and return
await base.ProcessResponseImplAsync(response);
return;
}
// note_ we don't send this request to the base class, hereon
// we get the current page info
var _currentPageStatelessInfo = GetCurrentPageStatelessContentState();
// else as per the navigation mode we change the stacks
switch (response.Request.NavigationMode)
{
// we treat new and unknown alike
case NavigateMode.New:
case NavigateMode.Unknown:
// we check if we were to record
if (_currentPageStatelessInfo != null)
{
_backStack.Push(_currentPageStatelessInfo);
}
// we also clear the forward stack
_forwardStack.Clear();
// and we say history changed
RaiseHistoryChanged();
break;
case NavigateMode.Back:
// we push the current item into the forward stack
_forwardStack.Push(_currentPageStatelessInfo);
// we remove one item
_backStack.Pop();
// and we say history changed
RaiseHistoryChanged();
break;
case NavigateMode.Forward:
// we push the current item into the back stack
_backStack.Push(_currentPageStatelessInfo);
// and we remove one item
_forwardStack.Pop();
// and we say history changed and return
RaiseHistoryChanged();
break;
case NavigateMode.Refresh:
// we don't need to do anything here, as the history remains the same
break;
}
// we add to the journal the current page info - note we don't save the state when refreshing
if (base.CurrentNavigationRequest != null && !_isRestoring)
{
if (_states.ContainsKey(base.CurrentNavigationRequest.RequestUrl))
{
_states[base.CurrentNavigationRequest.RequestUrl] = GetCurrentPageContentState();
}
else
{
_states.Add(base.CurrentNavigationRequest.RequestUrl, GetCurrentPageContentState());
base.NotifyPropertyChanged(() => CanPurgeJournal);
}
}
// we save our supporters and use them - note_ we need to save this to access later
CurrentNavigationLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationLifecycle>(response.Content);
CurrentNavigationViewLifecycleSupporter = NavigationService.GetSupporter <ISupportNavigationViewLifecycle>(response.Content);
CurrentNavigationStateSupporter = NavigationService.GetSupporter <ISupportNavigationState>(response.Content);
CurrentNavigationViewStateSupporter = NavigationService.GetSupporter <ISupportNavigationViewState>(response.Content);
// we save the url and the content
CurrentNavigationRequest = response.Request;
SetValue(ContentProperty, response.Content);
// if the content support navigation, we pass in the request/response merged parameters
if (this.CurrentNavigationLifecycleSupporter != null)
{
CurrentNavigationLifecycleSupporter.Initialize(response.ResponseParameters);
await CurrentNavigationLifecycleSupporter.InitializeAsync(response.ResponseParameters);
Title = CurrentNavigationLifecycleSupporter.Title ??
nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
else
{
Title = nRoute.Navigation.Navigation.GetTitle(response.Content as DependencyObject);
}
// if the content supports state, and we are navigating back/forward
if (CurrentNavigationStateSupporter != null)
{
// restore state, if we have a state
if (_states.ContainsKey(response.Request.RequestUrl))
{
CurrentNavigationStateSupporter.RestoreState(_states[response.Request.RequestUrl].State); // note_ with stored state
}
}
// if the content supports view state, and we are navigating back/forward
if (CurrentNavigationViewStateSupporter != null)
{
if (_states.ContainsKey(response.Request.RequestUrl))
{
CurrentNavigationViewStateSupporter.RestoreState(_states[response.Request.RequestUrl].VisualState); // note_ with stored state
}
}
// and raise the event navigation completed
OnNavigationCompleted(new NavigatedEventArgs(this, response.Request));
// and once we have set the transition state, then we call the view's initialize
if (CurrentNavigationViewLifecycleSupporter != null)
{
CurrentNavigationViewLifecycleSupporter.Initialize(response);
}
}