https://note.com/usutani/n/ne4f7f87842f5

visit.pu

@startuml visit
hide footbox

note over Session: new
create Navigator
Session -> Navigator: new
create History
Session -> History: new
create PageView
Session -> PageView: new
create BrowserAdapter
Session -> BrowserAdapter: new

note over Session: visit
Session -> Navigator: proposeVisit
Navigator -> Session: delegate
Session -> BrowserAdapter: visitProposedToLocation
BrowserAdapter -> Navigator: startVisit

create Visit
Navigator -> Visit: currentVisit = new
Navigator -> Visit: start

Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> BrowserAdapter: visitStarted

BrowserAdapter -> Visit: issueRequest
create FetchRequest
Visit -> FetchRequest: request = new
Visit -> FetchRequest: perform
FetchRequest -> FetchRequest: allowRequestToBeIntercepted

FetchRequest -> Visit: requestStarted
Visit -> Visit: startRequest
Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> BrowserAdapter: visitRequestStarted
BrowserAdapter -> BrowserAdapter: showProgressBar

note over FetchRequest: fetch
FetchRequest -> FetchRequest: receive
create FetchResponse
FetchRequest -> FetchResponse: new
FetchRequest -> Visit: requestSucceededWithResponse
Visit -> FetchResponse: responseHTML
Visit -> FetchResponse: redirected
Visit -> FetchResponse: location
Visit -> Visit: recordResponse

Visit -> BrowserAdapter: visitRequestFailedWithStatusCode
BrowserAdapter -> Visit: loadResponse

Visit -> Visit: render
Visit -> Visit: cancelRender
note over Visit: this.frame = requestAnimationFrame(() => resolve())
Visit -> Visit: callback

Visit -> Visit: cacheSnapshot
Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> PageView: cacheSnapshot
PageView -> Session: viewWillCacheSnapshot
Session -> Session: notifyApplicationBeforeCachingSnapshot

Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> PageView: renderPromise

Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> PageView: renderPage

create PageRenderer
PageView -> PageRenderer: new
PageView -> PageView: render
PageView -> PageView: ...

Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> BrowserAdapter: visitRendered

Visit -> Visit: complete
Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> BrowserAdapter: visitCompleted
BrowserAdapter -> Visit: followRedirect

Visit -> Navigator: delegate
Navigator -> Session: visitCompleted
Session -> Session: notifyApplicationAfterPageLoad

note over Visit: delete this.frame
Visit -> Visit: performScroll

FetchRequest -> Visit: requestFinished
Visit -> Visit: finishRequest
Visit -> Navigator: delegate
Navigator -> Session: delegate
Session -> BrowserAdapter: visitRequestFinished
BrowserAdapter -> BrowserAdapter: hideProgressBar

@enduml