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/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 2; -*- */
/* vim: set sw=2 ts=8 et 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 "PopupQueue.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/Element.h"
#include "nsThreadUtils.h"
using namespace mozilla;
void PopupQueue::Enqueue(Element* aPopup,
MoveOnlyFunction<void(Element*)>&& aCallback) {
if (!aCallback) {
return;
}
if (Store(aPopup, false, std::move(aCallback)) && !mShowing) {
MaybeShowNext();
}
}
void PopupQueue::Show(Element* aPopup,
MoveOnlyFunction<void(Element*)>&& aCallback) {
if (!aCallback) {
return;
}
MoveOnlyFunction<void(Element*)> callback = std::move(aCallback);
if (Store(aPopup, true, nullptr)) {
++mShowing;
callback(aPopup);
}
}
bool PopupQueue::Store(Element* aPopup, bool aShown,
MoveOnlyFunction<void(Element*)>&& aCallback) {
// Let's avoid the same popup shown multiple time, if it's already on screen.
if (!aShown) {
for (const PendingPopup& popup : mQueue) {
if (popup.mPopup == aPopup) {
return false;
}
}
}
mQueue.AppendElement(PendingPopup{aPopup,
/* if not shown, it's qeueable */ !aShown,
aShown, std::move(aCallback)});
return true;
}
void PopupQueue::NotifyDismissed(Element* aPopup, bool aRemoveAll) {
if (mQueue.IsEmpty()) {
return;
}
for (uint32_t i = 0; i < mQueue.Length();) {
if (mQueue[i].mPopup == aPopup) {
if (mShowing && mQueue[i].mShown) {
--mShowing;
}
mQueue.RemoveElementAt(i);
if (!aRemoveAll) {
break;
}
continue;
}
++i;
}
if (!mQueue.IsEmpty() && !mShowing) {
NS_DispatchToMainThread(NewRunnableMethod("PopupQueue::MaybeShowNext", this,
&PopupQueue::MaybeShowNext));
}
}
void PopupQueue::MaybeShowNext() {
if (mQueue.IsEmpty() || mShowing) {
return;
}
PendingPopup& popup = mQueue[0];
++mShowing;
MOZ_ASSERT(!popup.mShown);
popup.mShown = true;
MoveOnlyFunction<void(Element*)> callback = std::move(popup.mCallback);
MOZ_ASSERT(!popup.mCallback);
callback(mQueue[0].mPopup);
}
PopupQueue::Element* PopupQueue::RetrieveQueueableShownPopup() const {
for (auto& popup : mQueue) {
if (popup.mQueueable && popup.mShown) {
return popup.mPopup;
}
}
return nullptr;
}
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