/*

 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. 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.  Oracle designates this

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

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.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>

#ifdef AIX

#include "porting_aix.h" /* For the 'dladdr' function. */

#endif

#ifdef DEBUG

#define VERBOSE_AWT_DEBUG

#endif

static void *awtHandle = NULL;

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

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

   first loaded */

JavaVM *jvm;

    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);

        if ((*env)->ExceptionCheck(env)) {

            (*env)->ExceptionClear(env);

            return JNI_TRUE;

        }

    }

    return isHeadless;

}

#define CHECK_EXCEPTION_FATAL(env, message) \

    if ((*env)->ExceptionCheck(env)) { \

        (*env)->ExceptionClear(env); \

        (*env)->FatalError(env, message); \

    }

/*

 * Pathnames to the various awt toolkits

 */

#ifdef MACOSX

  #define LWAWT_PATH "/libawt_lwawt.dylib"

  #define DEFAULT_PATH LWAWT_PATH

#else

  #define XAWT_PATH "/libawt_xawt.so"

  #define DEFAULT_PATH XAWT_PATH

  #define HEADLESS_PATH "/libawt_headless.so"

#endif

jint

AWT_OnLoad(JavaVM *vm, void *reserved)

{

    Dl_info dlinfo;

    char buf[MAXPATHLEN];

    int32_t len;

    char *p, *tk;

    JNI_OnLoad_type *JNI_OnLoad_ptr;

    struct utsname name;

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

    void *v;

    jstring fmanager = NULL;

    jstring fmProp = 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 *)AWT_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. libawt_xawt or libawt_headless

     * 2. Set the "sun.font.fontmanager" system property.

     */

    fmProp = (*env)->NewStringUTF(env, "sun.font.fontmanager");

    CHECK_EXCEPTION_FATAL(env, "Could not allocate font manager property");

#ifdef MACOSX

        fmanager = (*env)->NewStringUTF(env, "sun.font.CFontManager");

        tk = LWAWT_PATH;

#else

        fmanager = (*env)->NewStringUTF(env, "sun.awt.X11FontManager");

        tk = XAWT_PATH;

#endif

    CHECK_EXCEPTION_FATAL(env, "Could not allocate font manager name");

    if (fmanager && fmProp) {

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

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

                                   fmProp, fmanager);

        CHECK_EXCEPTION_FATAL(env, "Could not allocate set properties");

    }

#ifndef MACOSX

    if (AWTIsHeadless()) {

        tk = HEADLESS_PATH;

    }

#endif

    /* Calculate library name to load */

    strncpy(p, tk, MAXPATHLEN-len-1);

    if (fmProp) {

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

    }

    if (fmanager) {

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

    }

    jstring jbuf = JNU_NewStringPlatform(env, buf);

    CHECK_EXCEPTION_FATAL(env, "Could not allocate library name");

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

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

                               jbuf);

    awtHandle = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);

    return JNI_VERSION_1_2;

}

JNIEXPORT jint JNICALL

DEF_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 libawt_<toolkit>.so.

 */

JNIEXPORT void JNICALL

Java_sun_awt_motif_XsessionWMcommand(JNIEnv *env, jobject this,

                                     jobject frame, jstring jcommand)

{

    /* type of the old backdoor function */

    typedef 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 libawt_<toolkit>.so.

 */

JNIEXPORT void JNICALL

Java_sun_awt_motif_XsessionWMcommand_New(JNIEnv *env, jobjectArray jargv)

{

    typedef 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);

}