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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CloseWatcher.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/CloseWatcherBinding.h"
#include "mozilla/dom/CloseWatcherManager.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventBinding.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/dom/WindowContext.h"
#include "nsGlobalWindowInner.h"
namespace mozilla::dom {
NS_IMPL_ISUPPORTS_INHERITED0(CloseWatcher, DOMEventTargetHelper)
already_AddRefed<CloseWatcher> CloseWatcher::Constructor(
const GlobalObject& aGlobal, const CloseWatcherOptions& aOptions,
ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
RefPtr<nsPIDOMWindowInner> window = global->GetAsInnerWindow();
if (!window || !window->IsFullyActive()) {
aRv.ThrowInvalidStateError("The document is not fully active.");
return nullptr;
}
RefPtr<CloseWatcher> watcher = new CloseWatcher(window);
AbortSignal* signal = nullptr;
if (aOptions.mSignal.WasPassed()) {
signal = &aOptions.mSignal.Value();
}
if (signal && signal->Aborted()) {
return watcher.forget();
}
if (signal) {
watcher->Follow(signal);
}
watcher->AddToWindowsCloseWatcherManager();
return watcher.forget();
}
JSObject* CloseWatcher::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return CloseWatcher_Binding::Wrap(aCx, this, aGivenProto);
}
// https://html.spec.whatwg.org/multipage/interaction.html#close-watcher-request-close
bool CloseWatcher::RequestToClose(bool aRequireHistoryActionActivation) {
// 1. If closeWatcher is not active, then return true.
// 2. If the result of running closeWatcher's get enabled state is false, then
// return true.
// 3. If closeWatcher's is running cancel action is true, then return true.
// 4. Let window be closeWatcher's window.
// 5. If window's associated Document is not fully active, then return true.
if (!IsActive() || mIsRunningCancelAction) {
return true;
}
MOZ_ASSERT(GetOwnerWindow());
RefPtr<WindowContext> winCtx = GetOwnerWindow()->GetWindowContext();
RefPtr<CloseWatcherManager> manager =
GetOwnerWindow()->EnsureCloseWatcherManager();
EventInit init;
init.mBubbles = false;
// 6. Let canPreventClose be true if window's close watcher manager's groups's
// size is less than window's close watcher manager's allowed number of
// groups, and window has history-action activation; otherwise false.
init.mCancelable =
!aRequireHistoryActionActivation ||
(manager->CanGrow() && winCtx->HasValidHistoryActivation());
RefPtr<Event> event = Event::Constructor(this, u"cancel"_ns, init);
event->SetTrusted(true);
// 7. Set closeWatcher's is running cancel action to true.
mIsRunningCancelAction = true;
// 8. Let shouldContinue be the result of running closeWatcher's cancel action
// given canPreventClose.
DispatchEvent(*event);
// 9. Set closeWatcher's is running cancel action to false.
mIsRunningCancelAction = false;
// 10. If shouldContinue is false, then:
if (event->DefaultPrevented()) {
// 10.2. Consume history-action user activation given window.
winCtx->ConsumeHistoryActivation();
// 10.3. Return false.
return false;
}
// 11. Close closeWatcher.
Close();
// 12. Return true.
return true;
}
// https://html.spec.whatwg.org/multipage/interaction.html#close-watcher-close
void CloseWatcher::Close() {
// 1. If closeWatcher is not active, then return.
// 2. If the result of running closeWatcher's get enabled state is false, then
// return true.
// 3. If closeWatcher's window's associated Document is not fully active, then
// return.
if (!IsActive()) {
return;
}
// 4. Destroy closeWatcher.
Destroy();
EventInit init;
init.mBubbles = false;
init.mCancelable = false;
RefPtr<Event> event = Event::Constructor(this, u"close"_ns, init);
event->SetTrusted(true);
DispatchEvent(*event);
}
void CloseWatcher::AddToWindowsCloseWatcherManager() {
if (auto* window = GetOwnerWindow()) {
window->EnsureCloseWatcherManager()->Add(*this);
window->NotifyCloseWatcherAdded();
}
}
void CloseWatcher::Destroy() {
if (auto* window = GetOwnerWindow()) {
window->EnsureCloseWatcherManager()->Remove(*this);
window->NotifyCloseWatcherRemoved();
}
}
bool CloseWatcher::IsActive() const {
if (!mEnabled) {
return false;
}
if (auto* window = GetOwnerWindow()) {
return window->IsFullyActive() &&
window->EnsureCloseWatcherManager()->Contains(*this);
}
return false;
}
void CloseWatcher::RunAbortAlgorithm() { Destroy(); }
} // namespace mozilla::dom
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