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/* -*- Mode: c++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4; -*- */
/* 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/. */
#ifndef nsAppShell_h__
#define nsAppShell_h__
#include "mozilla/HangMonitor.h"
#include "mozilla/LinkedList.h"
#include "mozilla/Monitor.h"
#include "mozilla/Move.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "mozilla/jni/Natives.h"
#include "nsBaseAppShell.h"
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "nsInterfaceHashtable.h"
#include "nsIAndroidBridge.h"
namespace mozilla {
bool ProcessNextEvent();
void NotifyEvent();
}
class nsWindow;
class nsAppShell :
public nsBaseAppShell
{
public:
struct Event : mozilla::LinkedListElement<Event>
{
typedef mozilla::HangMonitor::ActivityType Type;
bool HasSameTypeAs(const Event* other) const
{
// Compare vtable addresses to determine same type.
return *reinterpret_cast<const uintptr_t*>(this)
== *reinterpret_cast<const uintptr_t*>(other);
}
virtual ~Event() {}
virtual void Run() = 0;
virtual void PostTo(mozilla::LinkedList<Event>& queue)
{
queue.insertBack(this);
}
virtual Type ActivityType() const
{
return Type::kGeneralActivity;
}
};
template<typename T>
class LambdaEvent : public Event
{
protected:
T lambda;
public:
LambdaEvent(T&& l) : lambda(mozilla::Move(l)) {}
void Run() override { return lambda(); }
};
class ProxyEvent : public Event
{
protected:
mozilla::UniquePtr<Event> baseEvent;
public:
ProxyEvent(mozilla::UniquePtr<Event>&& event)
: baseEvent(mozilla::Move(event))
{}
void PostTo(mozilla::LinkedList<Event>& queue) override
{
baseEvent->PostTo(queue);
}
void Run() override
{
baseEvent->Run();
}
};
static nsAppShell* Get()
{
MOZ_ASSERT(NS_IsMainThread());
return sAppShell;
}
nsAppShell();
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIOBSERVER
nsresult Init();
void NotifyNativeEvent();
bool ProcessNextNativeEvent(bool mayWait) override;
// Post a subclass of Event.
// e.g. PostEvent(mozilla::MakeUnique<MyEvent>());
template<typename T, typename D>
static void PostEvent(mozilla::UniquePtr<T, D>&& event)
{
mozilla::MutexAutoLock lock(*sAppShellLock);
if (!sAppShell) {
return;
}
sAppShell->mEventQueue.Post(mozilla::Move(event));
}
// Post a event that will call a lambda
// e.g. PostEvent([=] { /* do something */ });
template<typename T>
static void PostEvent(T&& lambda)
{
mozilla::MutexAutoLock lock(*sAppShellLock);
if (!sAppShell) {
return;
}
sAppShell->mEventQueue.Post(mozilla::MakeUnique<LambdaEvent<T>>(
mozilla::Move(lambda)));
}
// Post a event and wait for it to finish running on the Gecko thread.
static void SyncRunEvent(Event&& event,
mozilla::UniquePtr<Event>(*eventFactory)(
mozilla::UniquePtr<Event>&&) = nullptr);
static already_AddRefed<nsIURI> ResolveURI(const nsCString& aUriStr);
void SetBrowserApp(nsIAndroidBrowserApp* aBrowserApp) {
mBrowserApp = aBrowserApp;
}
nsIAndroidBrowserApp* GetBrowserApp() {
return mBrowserApp;
}
protected:
static nsAppShell* sAppShell;
static mozilla::StaticAutoPtr<mozilla::Mutex> sAppShellLock;
virtual ~nsAppShell();
nsresult AddObserver(const nsAString &aObserverKey, nsIObserver *aObserver);
class NativeCallbackEvent : public Event
{
// Capturing the nsAppShell instance is safe because if the app
// shell is detroyed, this lambda will not be called either.
nsAppShell* const appShell;
public:
NativeCallbackEvent(nsAppShell* as) : appShell(as) {}
void Run() override { appShell->NativeEventCallback(); }
};
void ScheduleNativeEventCallback() override
{
mEventQueue.Post(mozilla::MakeUnique<NativeCallbackEvent>(this));
}
class Queue
{
private:
mozilla::Monitor mMonitor;
mozilla::LinkedList<Event> mQueue;
public:
Queue() : mMonitor("nsAppShell.Queue")
{}
void Signal()
{
mozilla::MonitorAutoLock lock(mMonitor);
lock.NotifyAll();
}
void Post(mozilla::UniquePtr<Event>&& event)
{
MOZ_ASSERT(event && !event->isInList());
mozilla::MonitorAutoLock lock(mMonitor);
event->PostTo(mQueue);
if (event->isInList()) {
// Ownership of event object transfers to the queue.
mozilla::Unused << event.release();
}
lock.NotifyAll();
}
mozilla::UniquePtr<Event> Pop(bool mayWait)
{
mozilla::MonitorAutoLock lock(mMonitor);
if (mayWait && mQueue.isEmpty()) {
lock.Wait();
}
// Ownership of event object transfers to the return value.
return mozilla::UniquePtr<Event>(mQueue.popFirst());
}
} mEventQueue;
mozilla::CondVar mSyncRunFinished;
bool mSyncRunQuit;
bool mAllowCoalescingTouches;
nsCOMPtr<nsIAndroidBrowserApp> mBrowserApp;
nsInterfaceHashtable<nsStringHashKey, nsIObserver> mObserversHash;
};
#endif // nsAppShell_h__
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