Tools/WinSN5.0Ver.iso/NETSCAP.50/WIN1998.ZIP/ns/cmd/xfe/plugins/javatest/npshell.c

C/C++ Source or Header | 1998-04-08 | 17.1 KB | 623 lines

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */
/*
 * npshell.c
 *
 * Netscape Client Plugin API
 * - Function that need to be implemented by plugin developers
 *
 * This file defines a "shell" plugin that plugin developers can use
 * as the basis for a real plugin.  This shell just provides empty
 * implementations of all functions that the plugin can implement
 * that will be called by Netscape (the NPP_xxx methods defined in
 * npapi.h).
 *
 * dp Suresh <[e-mail]>
 * Modified by Warren Harris to test Java stuff. <[e-mail]>
 *
 *----------------------------------------------------------------------
 * PLUGIN DEVELOPERS:
 *    Implement your plugins here.
 *    A sample text plugin is implemented here.
 *    All the sample plugin does is displays any file with a
 *    ".txt" extension in a scrolled text window. It uses Motif.
 *----------------------------------------------------------------------
 */

#include <stdio.h>
#include "prosdep.h"    /* include first to get the right #defines */
#include "npapi.h"

#include "JavaTestPlugin.h"
#include "java_lang_Class.h"
#include "java_lang_String.h"
#ifdef EMBEDDED_FRAMES
#include "java_awt_EmbeddedFrame.h"
#include "java_awt_Component.h"
#include "java_awt_Color.h"
#include "java_awt_Window.h"
#endif /* EMBEDDED_FRAMES */

#define TEXT_PLUGIN

#ifdef TEXT_PLUGIN
#include <Xm/Xm.h>
#include <Xm/Form.h>
#include <Xm/Text.h>
#endif /* TEXT_PLUGIN */

/***********************************************************************
 * Instance state information about the plugin.
 *
 * PLUGIN DEVELOPERS:
 *    Use this struct to hold per-instance information that you'll
 *    need in the various functions in this file.
 ***********************************************************************/

typedef struct _PluginInstance
{
    uint16 mode;
    Window window;
    Display *display;
    uint32 x, y;
    uint32 width, height;

#ifdef TEXT_PLUGIN
    Widget text;        /* Text widget */
#endif /* TEXT_PLUGIN */
} PluginInstance;


/***********************************************************************
 *
 * Empty implementations of plugin API functions
 *
 * PLUGIN DEVELOPERS:
 *    You will need to implement these functions as required by your
 *    plugin.
 *
 ***********************************************************************/

char*
NPP_GetMIMEDescription(void)
{
#ifdef TEXT_PLUGIN
    return("text/plain:.txt");
#else
    return("application/x-data:.sample");
#endif
}

#define PLUGIN_NAME        "Java Test Plugin"
#define PLUGIN_DESCRIPTION    "Tests java natives and reflection stuff."

NPError
NPP_GetValue(void *future, NPPVariable variable, void *value)
{
    NPError err = NPERR_NO_ERROR;
    if (variable == NPPVpluginNameString)
        *((char **)value) = PLUGIN_NAME;
    else if (variable == NPPVpluginDescriptionString)
        *((char **)value) = PLUGIN_DESCRIPTION;
    else
        err = NPERR_GENERIC_ERROR;

    return err;
}

JRIEnv* env;
JRIGlobalRef classString;
JRIGlobalRef classColor;
JRIGlobalRef classFrame;
JRIGlobalRef classJavaTestPlugin;

NPError
NPP_Initialize(void)
{
    return NPERR_NO_ERROR;
}

jref
NPP_GetJavaClass(void)
{
    jref myClass;

    env = NPN_GetJavaEnv();
    myClass = init_JavaTestPlugin(env);

    /* other classes I'll need: */
    classString = JRI_NewGlobalRef(env, init_java_lang_String(env));
#ifdef EMBEDDED_FRAMES
    classColor = JRI_NewGlobalRef(env, init_java_awt_Color(env));
    classFrame = JRI_NewGlobalRef(env, java_awt_EmbeddedFrame__init(env));
#endif
    classJavaTestPlugin = JRI_NewGlobalRef(env, myClass);

    return myClass;
}

void
NPP_Shutdown(void)
{
}


NPError
NPP_New(NPMIMEType pluginType,
    NPP instance,
    uint16 mode,
    int16 argc,
    char* argn[],
    char* argv[],
    NPSavedData* saved)
{
        NPError result = NPERR_NO_ERROR;
        PluginInstance* This;

    if (instance == NULL)
        return NPERR_INVALID_INSTANCE_ERROR;

    instance->pdata = NPN_MemAlloc(sizeof(PluginInstance));

    This = (PluginInstance*) instance->pdata;

    if (This == NULL)
        return NPERR_OUT_OF_MEMORY_ERROR;

    {
        /* mode is NP_EMBED, NP_FULL, or NP_BACKGROUND (see npapi.h) */
        This->mode = mode;
        This->window = (Window) 0;

        /* PLUGIN DEVELOPERS:
         *    Initialize fields of your plugin
         *    instance data here.  If the NPSavedData is non-
         *    NULL, you can use that data (returned by you from
         *    NPP_Destroy to set up the new plugin instance).
         */
    }

    /* Java Test */
    {
        jref plugin;
        jref fact;
        int val;

        plugin = JRI_GetGlobalRef(env, classJavaTestPlugin);
        val = JavaTestPlugin_fact(env, plugin, 10);    /* static method */
        if (JRI_ExceptionOccurred(env)) {
            fprintf(stderr, "fact failed\n");
            result = NPERR_INVALID_INSTANCE_ERROR;
            goto done;
        }
        printf("Plugin: Java sez: fact(10) = %d\n", val);

        fact = NPN_GetJavaPeer(instance);
        if (JRI_ExceptionOccurred(env)) {
            fprintf(stderr, "couldn't create a JavaTestPlugin object\n");
            result = NPERR_INVALID_INSTANCE_ERROR;
            goto done;
        }
        printf("Plugin: setting foo field to %d\n", 11111);
        set_JavaTestPlugin_foo(env, fact, 11111);
        printf("Plugin: reading foo field as %ld\n",
               get_JavaTestPlugin_foo(env, fact));
        printf("Plugin: calling into java to test plugin native methods\n");
        JavaTestPlugin_testPluginCalls(env, fact);
        printf("Plugin: reading foo field as %ld\n",
               get_JavaTestPlugin_foo(env, fact));
        if (JRI_ExceptionOccurred(env)) {
            fprintf(stderr, "test returned an error\n");
            result = NPERR_INVALID_INSTANCE_ERROR;
            goto done;
        }

      done:
        if (JRI_ExceptionOccurred(env)) {
            JRI_ExceptionDescribe(env);
            JRI_ExceptionClear(env);
        }
    }
    return result;
}


NPError
NPP_Destroy(NPP instance, NPSavedData** save)
{
    PluginInstance* This;

    if (instance == NULL)
        return NPERR_INVALID_INSTANCE_ERROR;

    This = (PluginInstance*) instance->pdata;

    /* PLUGIN DEVELOPERS:
     *    If desired, call NP_MemAlloc to create a
     *    NPSavedDate structure containing any state information
     *    that you want restored if this plugin instance is later
     *    recreated.
     */

    if (This != NULL) {
        NPN_MemFree(instance->pdata);
        instance->pdata = NULL;
    }

    return NPERR_NO_ERROR;
}



NPError
NPP_SetWindow(NPP instance, NPWindow* window)
{
    NPError result = NPERR_NO_ERROR;
    PluginInstance* This;

    if (instance == NULL)
        return NPERR_INVALID_INSTANCE_ERROR;

    This = (PluginInstance*) instance->pdata;

    /*
     * PLUGIN DEVELOPERS:
     *    Before setting window to point to the
     *    new window, you may wish to compare the new window
     *    info to the previous window (if any) to note window
     *    size changes, etc.
     */

    This->window = (Window) window->window;
    This->x = window->x;
    This->y = window->y;
    This->width = window->width;
    This->height = window->height;
    This->display = ((NPSetWindowCallbackStruct *)window->ws_info)->display;

#ifdef TEXT_PLUGIN
    {
        Widget netscape_widget;
        Widget form;
        Arg av[20];
        int ac;

        netscape_widget = XtWindowToWidget(This->display, This->window);

        ac = 0;
        XtSetArg(av[ac], XmNx, 0); ac++;
        XtSetArg(av[ac], XmNy, 0); ac++;
        XtSetArg(av[ac], XmNwidth, This->width); ac++;
        XtSetArg(av[ac], XmNheight, This->height); ac++;
        XtSetArg(av[ac], XmNborderWidth, 0); ac++;
        XtSetArg(av[ac], XmNnoResize, True); ac++;
        form = XmCreateForm(netscape_widget, "pluginForm",
                    av, ac);

        ac = 0;
        XtSetArg(av[ac], XmNleftAttachment, XmATTACH_FORM); ac++;
        XtSetArg(av[ac], XmNrightAttachment, XmATTACH_FORM); ac++;
        XtSetArg(av[ac], XmNtopAttachment, XmATTACH_FORM); ac++;
        XtSetArg(av[ac], XmNbottomAttachment, XmATTACH_FORM); ac++;
        XtSetArg (av[ac], XmNeditMode, XmMULTI_LINE_EDIT); ac++;
        This->text = XmCreateScrolledText (form, "pluginText", av, ac);

        XtManageChild(This->text);
        XtManageChild(form);

#ifdef EMBEDDED_FRAMES
    {
        JavaStatus err;
        jref frame;

        /* Create a window! */
        frame = java_awt_EmbeddedFrame_make_1(env,
            JRI_GetGlobalRef(env, classFrame), form);
        if ((err = JRI_GetError(env)) != JavaStatusOk) {
        fprintf(stderr, "couldn't create an EmbeddedFrame (%d)\n", err);
        result = NPERR_INVALID_INSTANCE_ERROR;
        goto done;
        }
        fprintf(stderr, "frame = %p\n", frame);

        java_awt_Component_resize(env, frame, 30, 30);
        java_awt_Component_setBackground(env, frame,
        java_awt_Color_red_get(env, JRI_GetGlobalRef(env, classColor)));

        java_awt_Window_show(env, frame);
        if ((err = JRI_GetError(env)) != JavaStatusOk) {
        fprintf(stderr, "couldn't show EmbeddedFrame (%d)\n", err);
        result = NPERR_INVALID_INSTANCE_ERROR;
        goto done;
        }
        fprintf(stderr, "frame shown\n");

      done:
    }
#endif
    }
#endif /* TEXT_PLUGIN */

    return result;
}


NPError
NPP_NewStream(NPP instance,
          NPMIMEType type,
          NPStream *stream,
          NPBool seekable,
          uint16 *stype)
{
    PluginInstance* This;

    if (instance == NULL)
        return NPERR_INVALID_INSTANCE_ERROR;

    This = (PluginInstance*) instance->pdata;

    return NPERR_NO_ERROR;
}


/* PLUGIN DEVELOPERS:
 *    These next 2 functions are directly relevant in a plug-in which
 *    handles the data in a streaming manner. If you want zero bytes
 *    because no buffer space is YET available, return 0. As long as
 *    the stream has not been written to the plugin, Navigator will
 *    continue trying to send bytes.  If the plugin doesn't want them,
 *    just return some large number from NPP_WriteReady(), and
 *    ignore them in NPP_Write().  For a NP_ASFILE stream, they are
 *    still called but can safely be ignored using this strategy.
 */

int32 STREAMBUFSIZE = 0X0FFFFFFF; /* If we are reading from a file in NPAsFile
                   * mode so we can take any size stream in our
                   * write call (since we ignore it) */

int32
NPP_WriteReady(NPP instance, NPStream *stream)
{
    PluginInstance* This;
    if (instance != NULL)
        This = (PluginInstance*) instance->pdata;

    /* Number of bytes ready to accept in NPP_Write() */
    return STREAMBUFSIZE;
}


int32
NPP_Write(NPP instance, NPStream *stream, int32 offset, int32 len, void *buffer)
{
    if (instance != NULL)
    {
        PluginInstance* This = (PluginInstance*) instance->pdata;
#ifdef TEXT_PLUGIN
        char *cbuf;
        XmTextPosition pos = 0;

        cbuf = (char *) NPN_MemAlloc(len + 1);
        if (!cbuf) return 0;
        memcpy(cbuf, ((char *)buffer)+offset, len);
        cbuf[len] = '\0';
        XtVaGetValues(This->text, XmNcursorPosition, &pos, 0);
        XmTextInsert(This->text, pos, cbuf);
        NPN_MemFree(cbuf);
#endif /* TEXT_PLUGIN */
    }

    return len;        /* The number of bytes accepted */
}


NPError
NPP_DestroyStream(NPP instance, NPStream *stream, NPError reason)
{
    PluginInstance* This;

    if (instance == NULL)
        return NPERR_INVALID_INSTANCE_ERROR;
    This = (PluginInstance*) instance->pdata;

    return NPERR_NO_ERROR;
}


void
NPP_StreamAsFile(NPP instance, NPStream *stream, const char* fname)
{
    PluginInstance* This;
    if (instance != NULL)
        This = (PluginInstance*) instance->pdata;
}


void
NPP_Print(NPP instance, NPPrint* printInfo)
{
    if(printInfo == NULL)
        return;

    if (instance != NULL) {
        PluginInstance* This = (PluginInstance*) instance->pdata;

        if (printInfo->mode == NP_FULL) {
            /*
             * PLUGIN DEVELOPERS:
             *    If your plugin would like to take over
             *    printing completely when it is in full-screen mode,
             *    set printInfo->pluginPrinted to TRUE and print your
             *    plugin as you see fit.  If your plugin wants Netscape
             *    to handle printing in this case, set
             *    printInfo->pluginPrinted to FALSE (the default) and
             *    do nothing.  If you do want to handle printing
             *    yourself, printOne is true if the print button
             *    (as opposed to the print menu) was clicked.
             *    On the Macintosh, platformPrint is a THPrint; on
             *    Windows, platformPrint is a structure
             *    (defined in npapi.h) containing the printer name, port,
             *    etc.
             */

            void* platformPrint =
                printInfo->print.fullPrint.platformPrint;
            NPBool printOne =
                printInfo->print.fullPrint.printOne;

            /* Do the default*/
            printInfo->print.fullPrint.pluginPrinted = FALSE;
        }
        else {    /* If not fullscreen, we must be embedded */
            /*
             * PLUGIN DEVELOPERS:
             *    If your plugin is embedded, or is full-screen
             *    but you returned false in pluginPrinted above, NPP_Print
             *    will be called with mode == NP_EMBED.  The NPWindow
             *    in the printInfo gives the location and dimensions of
             *    the embedded plugin on the printed page.  On the
             *    Macintosh, platformPrint is the printer port; on
             *    Windows, platformPrint is the handle to the printing
             *    device context.
             */

            NPWindow* printWindow =
                &(printInfo->print.embedPrint.window);
            void* platformPrint =
                printInfo->print.embedPrint.platformPrint;
        }
    }
}

/******************************************************************************/

/* public native doPluginStuff(Ljava/lang/String;I)C */
jchar
JavaTestPlugin_doPluginStuff(JRIEnv* env, struct JavaTestPlugin* self,
                             struct java_lang_String * s, jint i)
{
    const jchar* chars = JRI_GetStringChars(env, s);
    return chars[0];
}

/* public native native1()V */
void
JavaTestPlugin_native1(JRIEnv* env,struct JavaTestPlugin* self)
{
    fprintf(stderr, "Plugin: native1 called!\n");
}

/* public native native2(B)B */
jbyte
JavaTestPlugin_native2(JRIEnv* env,struct JavaTestPlugin* self,jbyte b)
{
    return b + 4;
}

/* public native native3(C)C */
jchar
JavaTestPlugin_native3(JRIEnv* env,struct JavaTestPlugin* self,jchar c)
{
    return c + 1;
}

/* public native native4(S)S */
jshort

JavaTestPlugin_native4(JRIEnv* env,struct JavaTestPlugin* self,jshort s)
{
    return s + 1;
}

/* public native native5(I)I */
jint
JavaTestPlugin_native5(JRIEnv* env,struct JavaTestPlugin* self,jint i)
{
    return i + 1;
}

/* public native native6(J)J */
jlong
JavaTestPlugin_native6(JRIEnv* env,struct JavaTestPlugin* self,jlong l)
{
    jlong result, tmp;
    jlong_I2L(tmp, 65536);
    jlong_ADD(result, l, tmp);
    return result;
}

/* public native native7(F)F */
jfloat
JavaTestPlugin_native7(JRIEnv* env,struct JavaTestPlugin* self,jfloat f)
{
    return f + 1.0;
}

/* public native native8(D)D */
jdouble
JavaTestPlugin_native8(JRIEnv* env,struct JavaTestPlugin* self,jdouble d)
{
    return d + 1e10;
}

/* public native native9(Ljava/lang/String;ISCB)Ljava/lang/String; */
struct java_lang_String *
JavaTestPlugin_native9(JRIEnv* env, struct JavaTestPlugin* self,
                       struct java_lang_String * s, jint j, jlong x,
                       jfloatArray floats, jbooleanArray bools)
{
    jref clazz, ba;
    jbool* b;
    char* c;
    jsize len = JRI_GetFloatArrayLength(env, floats);
    jfloat* f = JRI_GetFloatArrayData(env, floats);
    jsize i;
    for (i = 0; i < len; i++) {
        fprintf(stderr, "float %d: %f", i, f[i]);
        f[i] *= 2.2;
        fprintf(stderr, " => %f\n", f[i]);
    }
    len = JRI_GetBooleanArrayLength(env, bools);
    b = JRI_GetBooleanArrayData(env, bools);
    for (i = 0; i < len; i++) {
        fprintf(stderr, "boolean %d: %d\n", i, b[i]);
    }
    ba = JRI_FindClass(env, JRISigArray(JRISigBoolean));
    c = JRI_CopyStringUTF(env, java_lang_Class_getName(ba, env));
    fprintf(stderr, "class [b => %p (%s)\n", enamed NPN_GetJavaInstance & Plugin.getNativeInstance -> NPN_GetJavaPeer & Plugin.getPeer.
    free(c);

    clazz = JRI_GetObjectClass(env, shorts);
    c = JRI_CopyStringUTF(env, java_lang_Class_getName(env, clazz));
    fprintf(stderr, "class of shorts => %p (%s)\n", clazz, c);
    free(c);

    na = JRI_NewShortArray(env, 2, ss);
    clazz = JRI_GetObjectClass(env, na);
    c = JRI_CopyStringUTF(env, java_lang_Class_getName(env, clazz));
    fprintf(stderr, "class of the new short array => %p (%s)\n", clazz, c);

    /* can we call methods with double results properly */
    d = JavaTestPlugin_native8(env, self, 2e10);
    fprintf(stderr, "calling native8(2e10) => %lf %s\n", d,
            (d == 3e10 ? "ok" : "error"));

    /* can we call a system function */
    return java_lang_String_substring(env, s, j);
}