AtomicGameEngine/Source/AtomicWebView/WebBrowserHost.cpp

#include <SDL/include/SDL.h>
#include <ThirdParty/SDL/include/SDL_syswm.h>

#include <include/cef_app.h>
#include <include/cef_client.h>
#include <include/wrapper/cef_helpers.h>
#include <include/base/cef_bind.h>
#include <include/wrapper/cef_closure_task.h>

#include <Atomic/Core/ProcessUtils.h>
#include <Atomic/Core/CoreEvents.h>
#include <Atomic/IO/Log.h>

#include <Atomic/Graphics/Graphics.h>

#include "Internal/WebAppBrowser.h"

#include "WebSchemeHandler.h"
#include "WebClient.h"
#include "WebBrowserHost.h"

#ifdef ATOMIC_PLATFORM_LINUX

#include <X11/Xlib.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>

static int XErrorHandlerImpl(Display *display, XErrorEvent *event) {
  return 0;
}

static int XIOErrorHandlerImpl(Display *display) {
  return 0;
}

static void TerminationSignalHandler(int signatl) {

}

#endif



namespace Atomic
{

class WebBrowserHostPrivate
{
    friend class WebBrowserHost;

public:

    WebBrowserHostPrivate(WebBrowserHost* host)
    {

        host_ = host;
        app_ = new WebAppBrowser();
    }

    virtual ~WebBrowserHostPrivate()
    {
        host_ = 0;
    }

private:

    WeakPtr<WebBrowserHost> host_;
    CefRefPtr<CefApp> app_;

};

WebBrowserHost::WebBrowserHost(Context* context) : Object (context)
{

    const Vector<String>& arguments = GetArguments();

    #ifdef ATOMIC_PLATFORM_LINUX
      XSetErrorHandler(XErrorHandlerImpl);
      XSetIOErrorHandler(XIOErrorHandlerImpl);

      // Install a signal handler so we clean up after ourselves.
      signal(SIGINT, TerminationSignalHandler);
      signal(SIGTERM, TerminationSignalHandler);

    #endif


    // IMPORTANT: Cef::App contains virtual void OnBeforeCommandLineProcessing(), which should make it possible
    // to setup args on Windows

#ifdef ATOMIC_PLATFORM_OSX
    const char* _argv[3] = { "", "--enable-media-stream", "--enable-usermedia-screen-capturing" };
    CefMainArgs args(3, (char**) &_argv);
#elif ATOMIC_PLATFORM_LINUX
    static const char* _argv[3] = { "AtomicWebView", "--disable-setuid-sandbox", "--off-screen-rendering-enabled" };
    CefMainArgs args(3, (char**) &_argv);
#else
    CefMainArgs args;
#endif

    CefSettings settings;
    settings.windowless_rendering_enabled = true;

    d_ = new WebBrowserHostPrivate(this);

    // If losing OSX system menu, it means we're calling this
    // before initializing graphics subsystem
    if (!CefInitialize(args, settings, d_->app_, nullptr))
    {
        LOGERROR("CefInitialize - Error");
    }

    RegisterWebSchemeHandlers(this);

    SubscribeToEvent(E_BEGINFRAME, HANDLER(WebBrowserHost, HandleBeginFrame));

}

WebBrowserHost::~WebBrowserHost()
{
    CefClearSchemeHandlerFactories();
    CefShutdown();
}

void WebBrowserHost::HandleBeginFrame(StringHash eventType, VariantMap& eventData)
{
    CefDoMessageLoopWork();
}

}