GeckoProcessManager.h

/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
 * 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 GeckoProcessManager_h
#define GeckoProcessManager_h

#include "GeneratedJNINatives.h"
#include "WidgetUtils.h"
#include "nsAppShell.h"
#include "nsWindow.h"

#include "mozilla/RefPtr.h"
#include "mozilla/dom/ContentProcessManager.h"

namespace mozilla {

class GeckoProcessManager final
    : public java::GeckoProcessManager::Natives<GeckoProcessManager>
{
    GeckoProcessManager() = delete;

    static already_AddRefed<nsIWidget>
    GetWidget(int64_t aContentId, int64_t aTabId)
    {
        using namespace dom;
        MOZ_ASSERT(NS_IsMainThread());

        ContentProcessManager* const cpm =
            ContentProcessManager::GetSingleton();
        NS_ENSURE_TRUE(cpm, nullptr);

        RefPtr<TabParent> tab = cpm->GetTopLevelTabParentByProcessAndTabId(
                ContentParentId(aContentId), TabId(aTabId));
        NS_ENSURE_TRUE(tab, nullptr);

        nsCOMPtr<nsPIDOMWindowOuter> domWin = tab->GetParentWindowOuter();
        NS_ENSURE_TRUE(domWin, nullptr);

        return widget::WidgetUtils::DOMWindowToWidget(domWin);
    }

public:
    static jni::Object::LocalRef
    GetEditableParent(int64_t aContentId, int64_t aTabId)
    {
        // On binder thread.
        jni::Object::GlobalRef ret;
        nsAppShell::SyncRunEvent([aContentId, aTabId, &ret] {
            nsCOMPtr<nsIWidget> widget = GetWidget(aContentId, aTabId);
            if (widget) {
                ret = static_cast<nsWindow*>(widget.get())->GetEditableParent();
            }
        });
        return ret;
    }
};

} // namespace mozilla

#endif // GeckoProcessManager_h