import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/android/nsAppShell.h

@@ -0,0 +1,223 @@
+/* -*- 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__
+