/*

 * Copyright 2000-2005 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

#include <stdio.h>

#include <dlfcn.h>

#include <string.h>

#include <stdlib.h>

#include <jni.h>

#include <jni_util.h>

#include <jvm.h>

#include "gdefs.h"

#include <sys/param.h>

#include <sys/utsname.h>

#include "awt_Plugin.h"

#ifdef DEBUG

#define VERBOSE_AWT_DEBUG

#endif

static void *awtHandle = NULL;

typedef JNIEXPORT jint JNICALL JNI_OnLoad_type(JavaVM *vm, void *reserved);

/* Initialize the Java VM instance variable when the library is

   first loaded */

JavaVM *jvm;

JNIEXPORT jboolean JNICALL AWTIsHeadless() {

    static JNIEnv *env = NULL;

    static jboolean isHeadless;

    jmethodID headlessFn;

    jclass graphicsEnvClass;

    if (env == NULL) {

        env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);

        graphicsEnvClass = (*env)->FindClass(env,

                                             "java/awt/GraphicsEnvironment");

        if (graphicsEnvClass == NULL) {

            return JNI_TRUE;

        }

        headlessFn = (*env)->GetStaticMethodID(env,

                                               graphicsEnvClass, "isHeadless", "()Z");

        if (headlessFn == NULL) {

            return JNI_TRUE;

        }

        isHeadless = (*env)->CallStaticBooleanMethod(env, graphicsEnvClass,

                                                     headlessFn);

    }

    return isHeadless;

}

jint

AWT_OnLoad(JavaVM *vm, void *reserved)

{

    Dl_info dlinfo;

    char buf[MAXPATHLEN];

    int32_t len;

    char *p;

    JNI_OnLoad_type *JNI_OnLoad_ptr;

    struct utsname name;

    JNIEnv *env = (JNIEnv *)JNU_GetEnv(vm, JNI_VERSION_1_2);

    void *v;

    char *envvar;

    int xt_before_xm = 0;

    int XAWT = 0;

    jstring toolkit = NULL;

    jstring propname = NULL;

    if (awtHandle != NULL) {

        /* Avoid several loading attempts */

        return JNI_VERSION_1_2;

    }

    jvm = vm;

    /* Get address of this library and the directory containing it. */

    dladdr((void *)JNI_OnLoad, &dlinfo);

    realpath((char *)dlinfo.dli_fname, buf);

    len = strlen(buf);

    p = strrchr(buf, '/');

    /*

     * The code below is responsible for:

     * 1. Loading appropriate awt library, i.e. xawt/libmawt or headless/libwawt

     * 2. Setting "awt.toolkit" system property to use the appropriate Java toolkit class,

     *    (if user has specified the toolkit in env varialble)

     */

    propname = (*env)->NewStringUTF(env, "awt.toolkit");

    /* Check if toolkit is specified in env variable */

    envvar = getenv("AWT_TOOLKIT");

    if (envvar) {

        if (strstr(envvar, "XToolkit")) {

            toolkit = (*env)->NewStringUTF(env, "sun.awt.X11.XToolkit");

        }

        /* If user specified toolkit then set java system property */

        if (toolkit && propname) {

            JNU_CallStaticMethodByName (env,

                                        NULL,

                                        "java/lang/System",

                                        "setProperty",

                                        "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;",

                                        propname,toolkit);

        }

    }

    /* Calculate toolkit name, kind of toolkit (XAWT, Motif) and library to load */

    if (AWTIsHeadless()) {

        strcpy(p, "/headless/libmawt");

    } else {

        /* Default AWT Toolkit on Linux and Solaris is XAWT. */

        strcpy(p, "/xawt/libmawt");

    }

    if (toolkit) {

        (*env)->DeleteLocalRef(env, toolkit);

    }

    if (propname) {

        (*env)->DeleteLocalRef(env, propname);

    }

    strcat(p, ".so");

    JNU_CallStaticMethodByName(env, NULL, "java/lang/System", "load",

                               "(Ljava/lang/String;)V",

                               JNU_NewStringPlatform(env, buf));

    awtHandle = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);

/*

  if (dlsym(awtHandle, "AWTCharRBearing") == NULL) {

  printf("========= AWTCharRBearing not found\n"); fflush(stdout);

  }

  else {

  printf("========= AWTCharRBearing was found\n"); fflush(stdout);

  }

*/

    return JNI_VERSION_1_2;

}

JNIEXPORT jint JNICALL

JNI_OnLoad(JavaVM *vm, void *reserved)

{

    return AWT_OnLoad(vm, reserved);

}

/*

 * This entry point must remain in libawt.so as part of a contract

 * with the CDE variant of Java Media Framework. (sdtjmplay)

 * Reflect this call over to the correct libmawt.so.

 */

JNIEXPORT void JNICALL

Java_sun_awt_motif_XsessionWMcommand(JNIEnv *env, jobject this,

                                     jobject frame, jstring jcommand)

{

    /* type of the old backdoor function */

    typedef JNIEXPORT void JNICALL

        XsessionWMcommand_type(JNIEnv *env, jobject this,

                               jobject frame, jstring jcommand);

    static XsessionWMcommand_type *XsessionWMcommand = NULL;

    if (XsessionWMcommand == NULL && awtHandle == NULL) {

        return;

    }

    XsessionWMcommand = (XsessionWMcommand_type *)

        dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand");

    if (XsessionWMcommand == NULL)

        return;

    (*XsessionWMcommand)(env, this, frame, jcommand);

}

/*

 * This entry point must remain in libawt.so as part of a contract

 * with the CDE variant of Java Media Framework. (sdtjmplay)

 * Reflect this call over to the correct libmawt.so.

 */

JNIEXPORT void JNICALL

Java_sun_awt_motif_XsessionWMcommand_New(JNIEnv *env, jobjectArray jargv)

{

    typedef JNIEXPORT void JNICALL

        XsessionWMcommand_New_type(JNIEnv *env, jobjectArray jargv);

    static XsessionWMcommand_New_type *XsessionWMcommand = NULL;

    if (XsessionWMcommand == NULL && awtHandle == NULL) {

        return;

    }

    XsessionWMcommand = (XsessionWMcommand_New_type *)

        dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand_New");

    if (XsessionWMcommand == NULL)

        return;

    (*XsessionWMcommand)(env, jargv);

}

#define REFLECT_VOID_FUNCTION(name, arglist, paramlist)                 \

typedef name##_type arglist;                                            \

void name arglist                                                       \

{                                                                       \

    static name##_type *name##_ptr = NULL;                              \

    if (name##_ptr == NULL && awtHandle == NULL) {                      \

        return;                                                         \

    }                                                                   \

    name##_ptr = (name##_type *)                                        \

        dlsym(awtHandle, #name);                                        \

    if (name##_ptr == NULL) {                                           \

        return;                                                         \

    }                                                                   \

    (*name##_ptr)paramlist;                                             \

}

#define REFLECT_FUNCTION(return_type, name, arglist, paramlist)         \

typedef return_type name##_type arglist;                                \

return_type name arglist                                                \

{                                                                       \

    static name##_type *name##_ptr = NULL;                              \

    if (name##_ptr == NULL && awtHandle == NULL) {                      \

        return NULL;                                                    \

    }                                                                   \

    name##_ptr = (name##_type *)                                        \

        dlsym(awtHandle, #name);                                        \

    if (name##_ptr == NULL) {                                           \

        return NULL;                                                    \

    }                                                                   \

    return (*name##_ptr)paramlist;                                      \

}

/*

 * These entry point must remain in libawt.so ***for Java Plugin ONLY***

 * Reflect this call over to the correct libmawt.so.

 */

REFLECT_VOID_FUNCTION(getAwtLockFunctions,

                      (void (**AwtLock)(JNIEnv *), void (**AwtUnlock)(JNIEnv *),

                       void (**AwtNoFlushUnlock)(JNIEnv *), void *reserved),

                      (AwtLock, AwtUnlock, AwtNoFlushUnlock, reserved))

REFLECT_VOID_FUNCTION(getAwtData,

                      (int32_t *awt_depth, Colormap *awt_cmap, Visual **awt_visual,

                       int32_t *awt_num_colors, void *pReserved),

                      (awt_depth, awt_cmap, awt_visual,

                       awt_num_colors, pReserved))

REFLECT_FUNCTION(Display *, getAwtDisplay, (void), ())