qnp.cpp

这个是Linux的qt源代码

/****************************************************************************
** $Id: qt/qnp.cpp   3.2.3   edited Jun 24 17:13 $
**
** Implementation of Qt extension classes for Netscape Plugin support.
**
** Created : 970601
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email [e-mail] for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/


// Remaining Q_WS_X11 considerations:
//   - What if !piApp upon NPP_NewStream?  Are we safe?
//      - Yes, but users need to know of this:  that no GUI can be
//         done until after setWindow is called.
//   - Use NPN_GetValue in Communicator4.0 to get the display earlier!
//   - For ClientMessage events, trap them, and if they are not for us,
//	untrap them and retransmit them and set a timer to retrap them
//	after N seconds.

// Remaining Q_WS_WIN considerations:
//   - we need to activateZeroTimers() at some time.
//   - we need to call winEventFilter on events
//   - timers:
//    if ( msg.message == WM_TIMER ) {            // timer message received
//        activateTimer( msg.wParam );
//        return TRUE;
//    }
//    if ( msg.message == WM_KEYDOWN || msg.message == WM_KEYUP ) {
//        if ( translateKeyCode(msg.wParam) == 0 ) {
//            TranslateMessage( &msg );           // translate to WM_CHAR
//            return TRUE;
//        }
//    }
//   - qWinProcessConfigRequests?

// Remaining general stuff:
//   - Provide the "reason" parameter to streamDestroyed

// Qt stuff
#include <qapplication.h>
#include <qeventloop.h>
#include <qwidget.h>
#include <qobjectlist.h>
#include <qcursor.h>
#include <qprinter.h>
#include <qfile.h>
#include <qpainter.h>

#include "qnp.h"

#include <stdlib.h>		// Must be here for Borland C++
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <limits.h>

#ifdef Q_WS_X11
#include <X11/Intrinsic.h>

class QNPXtPrivate;

class QNPXt : public QEventLoop
{
public:
    QNPXt( const char *applicationClass, XtAppContext context = NULL, XrmOptionDescRec *options = 0, int numOptions = 0);
    ~QNPXt();

    XtAppContext applicationContext() const;

    void registerSocketNotifier( QSocketNotifier * );
    void unregisterSocketNotifier( QSocketNotifier * );

    static void registerWidget( QWidget* );
    static void unregisterWidget( QWidget* );
    static bool redeliverEvent( XEvent *event );
    static XEvent* lastEvent();

protected:
    bool processEvents( ProcessEventsFlags flags );

private:
    void appStartingUp();
    void appClosingDown();
    QNPXtPrivate *d;

};

#define	 GC GC_QQQ
#endif

extern "C" {
//
// Netscape plugin API
//
#ifdef Q_WS_WIN
#ifndef _WINDOWS
#define _WINDOWS
#endif
#endif
#ifdef Q_WS_X11
#define XP_UNIX
#endif


// This is to allow mingw support on windows without altering the sun header files
#if defined(Q_CC_GNU) && defined(Q_WS_WIN) && !defined(_MSC_VER)
#define _MSC_VER 1
#include "npapi.h"
#undef _MSC_VER
#else
#include "npapi.h"
#endif

#ifdef Q_WS_X11
#undef XP_UNIX
#include "npunix.c"
#endif

//
// Stuff for the NPP_SetWindow function:
//
#ifdef Q_WS_X11
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include <X11/IntrinsicP.h> // for XtCreateWindow
#include <X11/Shell.h>
#include <X11/StringDefs.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
//#include <dlfcn.h>
#endif
#ifdef Q_WS_WIN
#include <windows.h>
#endif
}

#ifdef Q_WS_WIN
#include "npwin.cpp"
#endif

static QEventLoop* event_loop = 0;
static QApplication* application = 0;

struct _NPInstance
{
    uint16            fMode;

#ifdef Q_WS_WIN
    HWND            window;
#endif

    NPP npp;

#ifdef Q_WS_X11
    Window window;
    Display *display;
#endif

    uint32 x, y;
    uint32 width, height;

    QNPWidget* widget;
    QNPInstance* instance;

    int16 argc;
    QString *argn;
    QString *argv;
};



// The single global plugin
static QNPlugin *qNP=0;
static int instance_count=0;

// Temporary parameter passed `around the side' of calls to user functions
static _NPInstance* next_pi=0;

// To avoid looping when browser OR plugin can delete streams
static int qnps_no_call_back = 0;

#ifdef Q_WS_WIN
// defined in qapplication_win.cpp
Q_EXPORT extern bool qt_win_use_simple_timers;
static HHOOK hhook = 0;

LRESULT CALLBACK FilterProc( int nCode, WPARAM wParam, LPARAM lParam )
{
    if ( qApp )
	qApp->sendPostedEvents();

    return CallNextHookEx( hhook, nCode, wParam, lParam );
}

#endif

#ifdef Q_WS_X11
static int (*original_x_errhandler)( Display *dpy, XErrorEvent * ) = 0;
static int dummy_x_errhandler( Display *, XErrorEvent * )
{
    return 0;
}
#endif

/******************************************************************************
 * Plug-in Calls - these are called by Netscape
 *****************************************************************************/


// Instance state information about the plugin.

#ifdef Q_WS_X11

extern "C" char*
NPP_GetMIMEDescription(void)
{
    if (!qNP) qNP = QNPlugin::create();
    return (char*)qNP->getMIMEDescription();
}



extern "C" NPError
NPP_GetValue(void * /*future*/, NPPVariable variable, void *value)
{
    if (!qNP) qNP = QNPlugin::create();
    NPError err = NPERR_NO_ERROR;
    if (variable == NPPVpluginNameString)
	*((const char **)value) = qNP->getPluginNameString();
    else if (variable == NPPVpluginDescriptionString)
	*((const char **)value) = qNP->getPluginDescriptionString();
    else
	err = NPERR_GENERIC_ERROR;

    return err;
}

#endif

/*
** NPP_Initialize is called when your DLL is being loaded to do any
** DLL-specific initialization.
*/
extern "C" NPError
NPP_Initialize(void)
{
#ifdef Q_WS_WIN
    qt_win_use_simple_timers = TRUE;
    // Nothing more - we do it in DLLMain
#endif

    if (!qNP) qNP = QNPlugin::create();
    return NPERR_NO_ERROR;
}

static jref plugin_java_class = 0;

/*
** NPP_GetJavaClass is called during initialization to ask your plugin
** what its associated Java class is. If you don't have one, just return
** NULL. Otherwise, use the javah-generated "use_" function to both
** initialize your class and return it. If you can't find your class, an
** error will be signalled by "use_" and will cause the Navigator to
** complain to the user.
*/
extern "C" jref
NPP_GetJavaClass(void)
{
    if (!qNP) qNP = QNPlugin::create();
    plugin_java_class = (jref)qNP->getJavaClass();
    return plugin_java_class;
}

/*
** NPP_Shutdown is called when your DLL is being unloaded to do any
** DLL-specific shut-down. You should be a good citizen and declare that
** you're not using your java class any more. This allows java to unload
** it, freeing up memory.
*/
extern "C" void
NPP_Shutdown(void)
{
    if (qNP) {
	if (plugin_java_class)
	    qNP->unuseJavaClass();
	delete qNP;
	qNP = 0;
    }

#ifdef Q_WS_X11
    if ( original_x_errhandler )
    	XSetErrorHandler( original_x_errhandler );
#endif
    if ( qApp) {
#ifdef Q_WS_WIN32
	if ( hhook )
	    UnhookWindowsHookEx( hhook );
	hhook = 0;
#endif
	delete application;
	delete event_loop;
    }

}


struct NS_Private {
    uchar* a;
    uchar* b;
};

/*
** NPP_New is called when your plugin is instantiated (i.e. when an EMBED
** tag appears on a page).
*/
extern "C" NPError
NPP_New(NPMIMEType /*pluginType*/,
    NPP instance,
    uint16 mode,
    int16 argc,
    char* argn[],
    char* argv[],
    NPSavedData* /*saved*/)
{
    NPError result = NPERR_NO_ERROR;
    _NPInstance* This;

    if (instance == NULL)
	return NPERR_INVALID_INSTANCE_ERROR;

    instance->pdata = new _NPInstance;

    This = (_NPInstance*) instance->pdata;

    if (This == NULL)
	return NPERR_OUT_OF_MEMORY_ERROR;

    This->npp = instance;

    /* mode is NP_EMBED, NP_FULL, or NP_BACKGROUND (see npapi.h) */
    This->fMode = mode;

    This->window = 0;
    This->widget = 0;

    This->argc = argc;
    This->argn = new QString[argc+1];
    This->argv = new QString[argc+1];
    for (int i=0; i<This->argc; i++) {
	This->argn[i] = argn[i];
	This->argv[i] = argv[i];
    }

    // Everything is set up - we can let QNPInstance be created now.
    next_pi = This;
    qNP->newInstance();
    instance_count++;

    return result;
}

extern "C" NPError
NPP_Destroy(NPP instance, NPSavedData** /*save*/)
{
    _NPInstance* This;

    if (instance == NULL)
	return NPERR_INVALID_INSTANCE_ERROR;

    This = (_NPInstance*) instance->pdata;

    if (This != NULL) {
	delete This->widget;
	delete This->instance;
	delete [] This->argn;
	delete [] This->argv;

	delete This;
	instance->pdata = NULL;

	instance_count--;
    }

    return NPERR_NO_ERROR;
}

extern "C" NPError
NPP_SetWindow(NPP instance, NPWindow* window)
{
    if (!qNP) qNP = QNPlugin::create();
    NPError result = NPERR_NO_ERROR;
    _NPInstance* This;

    if (instance == NULL)
	return NPERR_INVALID_INSTANCE_ERROR;

    This = (_NPInstance*) instance->pdata;


    // take a shortcut if all that was changed is the geometry
    if ( This->widget && window
#ifdef Q_WS_X11
	 && This->window == (Window) window->window
#endif
#ifdef Q_WS_WIN
	 && This->window == (HWND) window->window
#endif
	) {
	This->x = window->x;
	This->y = window->y;
	This->width = window->width;
	This->height = window->height;
	This->widget->resize( This->width, This->height );
	return result;
    }

    delete This->widget;

    if ( !window )
	return result;

#ifdef Q_WS_X11
    This->window = (Window) window->window;
    This->display =
	((NPSetWindowCallbackStruct *)window->ws_info)->display;
#endif
#ifdef Q_WS_WIN
    This->window = (HWND) window->window;
#endif

    This->x = window->x;
    This->y = window->y;
    This->width = window->width;
    This->height = window->height;


    if (!qApp) {
#ifdef Q_WS_X11
	// We are the first Qt-based plugin to arrive
	event_loop = new QNPXt( "qnp", XtDisplayToApplicationContext(This->display) );
	application = new QApplication(This->display);
#endif
#ifdef Q_WS_WIN
	static int argc=0;
	static char **argv={ 0 };
	application = new QApplication( argc, argv );
#ifdef UNICODE
	if ( qWinVersion() & Qt::WV_NT_based )
	    hhook = SetWindowsHookExW( WH_GETMESSAGE, FilterProc, 0, GetCurrentThreadId() );
	else
#endif
	    hhook = SetWindowsHookExA( WH_GETMESSAGE, FilterProc, 0, GetCurrentThreadId() );
#endif
    }

#ifdef Q_WS_X11
    if ( !original_x_errhandler )
    	original_x_errhandler = XSetErrorHandler( dummy_x_errhandler );
#endif

    // New widget on this new window.
    next_pi = This;
    /* This->widget = */ // (happens sooner - in QNPWidget constructor)
    This->instance->newWindow();

    if ( !This->widget )
	return result;

#ifdef Q_WS_X11
    This->widget->resize( This->width, This->height );
    XReparentWindow( This->widget->x11Display(), This->widget->winId(), This->window, 0, 0 );
    XSync( This->widget->x11Display(), False );
#endif
#ifdef Q_WS_WIN
    ::SetWindowLong( This->widget->winId(), GWL_STYLE, WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS );
    ::SetParent( This->widget->winId(), This->window );
    This->widget->raise();
    This->widget->setGeometry( 0, 0, This->width, This->height );
#endif
    This->widget->show();
    return result;
}


extern "C" NPError
NPP_NewStream(NPP instance,
	  NPMIMEType type,
	  NPStream *stream,
	  NPBool seekable,