NpapiPluginX11.cpp

/**********************************************************\
Original Author: Richard Bateman (taxilian)

Created:    Dec 3, 2009
License:    Dual license model; choose one of two:
            New BSD License
            http://www.opensource.org/licenses/bsd-license.php
            - or -
            GNU Lesser General Public License, version 2.1
            http://www.gnu.org/licenses/lgpl-2.1.html

Copyright 2009 PacketPass, Inc and the Firebreath development team
\**********************************************************/

#include <dlfcn.h>

#include "NpapiTypes.h"
#include "PluginCore.h"
#include "X11/PluginWindowX11.h"
#include "FactoryBase.h"

#include "X11/NpapiPluginX11.h"
#include "NpapiPluginFactory.h"
#include <boost/make_shared.hpp>

FB::Npapi::NpapiPluginPtr FB::Npapi::createNpapiPlugin(const FB::Npapi::NpapiBrowserHostPtr& host, const std::string& mimetype)
{
    return boost::make_shared<NpapiPluginX11>(host, mimetype);
}

using namespace FB::Npapi;

inline GdkNativeWindow getGdkWindow(void *in)
{
    // This is one of the ugliest hacks known to man; it was neccesary to make 64 bit work.
    // Don't change it without testing on 32 and 64, and don't ask -- you don't want to know
    return (char*)in - (char*)0;
}

namespace
{
    std::string getPluginPath()
    {
        ::Dl_info dlinfo;
        if (::dladdr((void*)::NP_Initialize, &dlinfo) != 0) {
            return dlinfo.dli_fname;
        } else {
            return "";
        }
    }
}

NpapiPluginX11::NpapiPluginX11(const FB::Npapi::NpapiBrowserHostPtr& host, const std::string& mimetype)
    : NpapiPlugin(host, mimetype), pluginWin(NULL)
{
    PluginCore::setPlatform("X11", "NPAPI");

    // Get the path to the shared lib

    static const std::string pluginPath = getPluginPath();
    setFSPath(pluginPath);
}

NpapiPluginX11::~NpapiPluginX11()
{
    delete pluginWin;
    pluginWin = NULL;
}

NPError NpapiPluginX11::GetValue(NPPVariable variable, void *value)
{
    switch (variable) {
    /* Tell browser we use XEmbed, this is required for Chrome on Unix */
    case NPPVpluginNeedsXEmbed:
        *((bool *)value) = true;
        return NPERR_NO_ERROR;
    default:
        return NpapiPlugin::GetValue(variable, value);
    }
}

NPError NpapiPluginX11::SetWindow(NPWindow* window)
{
#if FB_GUI_DISABLED != 1
    if (window != NULL && window->window != NULL) {
        /* Require XEmbed support from browser, see:
         * https://developer.mozilla.org/en/XEmbed_Extension_for_Mozilla_Plugins
         */
        int xembedSupported = 0;

        m_npHost->GetValue(NPNVSupportsXEmbedBool, &xembedSupported);
        if (!xembedSupported)
        {
            FBLOG_ERROR("FB.NpapiPluginX11", "XEmbed not supported! Cannot create pluginwindow!");
            return NPERR_GENERIC_ERROR;
        }

        if (pluginWin != NULL && pluginWin->getTopLevelWindow() != getGdkWindow(window->window)) {
            pluginMain->ClearWindow();
            delete pluginWin;
            pluginWin = NULL;
        }

        if (pluginWin == NULL) {
            GdkNativeWindow browserWindow;
            m_npHost->GetValue(NPNVnetscapeWindow, (void*)&browserWindow);

            pluginWin = getFactoryInstance()->createPluginWindowX11(WindowContextX11(getGdkWindow(window->window)));
            pluginWin->setBrowserWindow(browserWindow);
            pluginWin->setWindowPosition(window->x, window->y, window->width, window->height);
            pluginWin->setWindowClipping(window->clipRect.top, window->clipRect.left,
                                         window->clipRect.bottom, window->clipRect.right);
            pluginMain->SetWindow(pluginWin);
        } else {
            pluginWin->setWindowPosition(window->x, window->y, window->width, window->height);
            pluginWin->setWindowClipping(window->clipRect.top, window->clipRect.left,
                                         window->clipRect.bottom, window->clipRect.right);
        }

    } else if (pluginWin != NULL) {
        // If the handle goes to NULL, our window is gone and we need to stop using it
        pluginMain->ClearWindow();
        delete pluginWin; pluginWin = NULL;
    }
#endif
    return NPERR_NO_ERROR;
}