/*

 * Copyright (c) 2002, 2019, 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 <X11/Xlib.h>

#include <X11/Xutil.h>

#include <X11/Xos.h>

#include <X11/Xatom.h>

#ifdef __linux__

#include <execinfo.h>

#endif

#include <jvm.h>

#include <jni.h>

#include <jlong.h>

#include <jni_util.h>

#include "awt_p.h"

#include "awt_Component.h"

#include "awt_MenuComponent.h"

#include "awt_util.h"

#include "sun_awt_X11_XToolkit.h"

#include "java_awt_SystemColor.h"

#include "java_awt_TrayIcon.h"

#include <X11/extensions/XTest.h>

#include <unistd.h>

uint32_t awt_NumLockMask = 0;

Boolean  awt_ModLockIsShiftLock = False;

static int32_t num_buttons = 0;

int32_t getNumButtons();

extern JavaVM *jvm;

// Tracing level

static int tracing = 0;

#ifdef PRINT

#undef PRINT

#endif

#ifdef PRINT2

#undef PRINT2

#endif

#define PRINT if (tracing) printf

#define PRINT2 if (tracing > 1) printf

struct ComponentIDs componentIDs;

struct MenuComponentIDs menuComponentIDs;

#ifndef HEADLESS

extern Display* awt_init_Display(JNIEnv *env, jobject this);

extern void freeNativeStringArray(char **array, jsize length);

extern char** stringArrayToNative(JNIEnv *env, jobjectArray array, jsize * ret_length);

#endif /* !HEADLESS */

/* This function gets called from the static initializer for FileDialog.java

   to initialize the fieldIDs for fields that may be accessed from C */

JNIEXPORT void JNICALL

Java_java_awt_FileDialog_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_sun_awt_X11_XToolkit_initIDs

  (JNIEnv *env, jclass clazz)

{

    jfieldID fid = (*env)->GetStaticFieldID(env, clazz, "numLockMask", "I");

    CHECK_NULL(fid);

    awt_NumLockMask = (*env)->GetStaticIntField(env, clazz, fid);

    DTRACE_PRINTLN1("awt_NumLockMask = %u", awt_NumLockMask);

    fid = (*env)->GetStaticFieldID(env, clazz, "modLockIsShiftLock", "I");

    CHECK_NULL(fid);

    awt_ModLockIsShiftLock = (*env)->GetStaticIntField(env, clazz, fid) != 0 ? True : False;

}

/*

 * Class:     sun_awt_X11_XToolkit

 * Method:    getTrayIconDisplayTimeout

 * Signature: ()J

 */

JNIEXPORT jlong JNICALL Java_sun_awt_X11_XToolkit_getTrayIconDisplayTimeout

  (JNIEnv *env, jclass clazz)

{

    return (jlong) 2000;

}

/*

 * Class:     sun_awt_X11_XToolkit

 * Method:    getDefaultXColormap

 * Signature: ()J

 */

JNIEXPORT jlong JNICALL Java_sun_awt_X11_XToolkit_getDefaultXColormap

  (JNIEnv *env, jclass clazz)

{

    AwtGraphicsConfigDataPtr defaultConfig =

        getDefaultConfig(DefaultScreen(awt_display));

    return (jlong) defaultConfig->awt_cmap;

}

JNIEXPORT jlong JNICALL Java_sun_awt_X11_XToolkit_getDefaultScreenData

  (JNIEnv *env, jclass clazz)

{

    return ptr_to_jlong(getDefaultConfig(DefaultScreen(awt_display)));

}

JNIEXPORT jint JNICALL

DEF_JNI_OnLoad(JavaVM *vm, void *reserved)

{

    jvm = vm;

    //Set the gtk backend to x11 on all the systems

    putenv("GDK_BACKEND=x11");

    return JNI_VERSION_1_2;

}

/*

 * Class:     sun_awt_X11_XToolkit

 * Method:    nativeLoadSystemColors

 * Signature: ([I)V

 */

JNIEXPORT void JNICALL Java_sun_awt_X11_XToolkit_nativeLoadSystemColors

  (JNIEnv *env, jobject this, jintArray systemColors)

{

    AwtGraphicsConfigDataPtr defaultConfig =

        getDefaultConfig(DefaultScreen(awt_display));

    awtJNI_CreateColorData(env, defaultConfig, 1);

}

JNIEXPORT void JNICALL

Java_java_awt_Component_initIDs

  (JNIEnv *env, jclass cls)

{

    jclass keyclass = NULL;

    componentIDs.x = (*env)->GetFieldID(env, cls, "x", "I");

    CHECK_NULL(componentIDs.x);

    componentIDs.y = (*env)->GetFieldID(env, cls, "y", "I");

    CHECK_NULL(componentIDs.y);

    componentIDs.width = (*env)->GetFieldID(env, cls, "width", "I");

    CHECK_NULL(componentIDs.width);

    componentIDs.height = (*env)->GetFieldID(env, cls, "height", "I");

    CHECK_NULL(componentIDs.height);

    componentIDs.isPacked = (*env)->GetFieldID(env, cls, "isPacked", "Z");

    CHECK_NULL(componentIDs.isPacked);

    componentIDs.peer =

      (*env)->GetFieldID(env, cls, "peer", "Ljava/awt/peer/ComponentPeer;");

    CHECK_NULL(componentIDs.peer);

    componentIDs.background =

      (*env)->GetFieldID(env, cls, "background", "Ljava/awt/Color;");

    CHECK_NULL(componentIDs.background);

    componentIDs.foreground =

      (*env)->GetFieldID(env, cls, "foreground", "Ljava/awt/Color;");

    CHECK_NULL(componentIDs.foreground);

    componentIDs.graphicsConfig =

        (*env)->GetFieldID(env, cls, "graphicsConfig",

                           "Ljava/awt/GraphicsConfiguration;");

    CHECK_NULL(componentIDs.graphicsConfig);

    componentIDs.name =

      (*env)->GetFieldID(env, cls, "name", "Ljava/lang/String;");

    CHECK_NULL(componentIDs.name);

    /* Use _NoClientCode() methods for trusted methods, so that we

     *  know that we are not invoking client code on trusted threads

     */

    componentIDs.getParent =

      (*env)->GetMethodID(env, cls, "getParent_NoClientCode",

                         "()Ljava/awt/Container;");

    CHECK_NULL(componentIDs.getParent);

    componentIDs.getLocationOnScreen =

      (*env)->GetMethodID(env, cls, "getLocationOnScreen_NoTreeLock",

                         "()Ljava/awt/Point;");

    CHECK_NULL(componentIDs.getLocationOnScreen);

    keyclass = (*env)->FindClass(env, "java/awt/event/KeyEvent");

    CHECK_NULL(keyclass);

    componentIDs.isProxyActive =

        (*env)->GetFieldID(env, keyclass, "isProxyActive",

                           "Z");

    CHECK_NULL(componentIDs.isProxyActive);

    componentIDs.appContext =

        (*env)->GetFieldID(env, cls, "appContext",

                           "Lsun/awt/AppContext;");

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

}

JNIEXPORT void JNICALL

Java_java_awt_Container_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_Button_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_Scrollbar_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_Window_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_Frame_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_MenuComponent_initIDs(JNIEnv *env, jclass cls)

{

    menuComponentIDs.appContext =

      (*env)->GetFieldID(env, cls, "appContext", "Lsun/awt/AppContext;");

}

JNIEXPORT void JNICALL

Java_java_awt_Cursor_initIDs(JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL Java_java_awt_MenuItem_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL Java_java_awt_Menu_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_TextArea_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_Checkbox_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL Java_java_awt_ScrollPane_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT void JNICALL

Java_java_awt_TextField_initIDs

  (JNIEnv *env, jclass cls)

{

}

JNIEXPORT jboolean JNICALL AWTIsHeadless() {

#ifdef HEADLESS

    return JNI_TRUE;

#else

    return JNI_FALSE;

#endif

}

JNIEXPORT void JNICALL Java_java_awt_Dialog_initIDs (JNIEnv *env, jclass cls)

{

}

/* ========================== Begin poll section ================================ */

// Includes

#include <sys/time.h>

#include <limits.h>

#include <locale.h>

#include <pthread.h>

#include <dlfcn.h>

#include <fcntl.h>

#include <poll.h>

#ifndef POLLRDNORM

#define POLLRDNORM POLLIN

#endif

// Prototypes

static void     waitForEvents(JNIEnv *, jlong);

static void     awt_pipe_init();

static Boolean  performPoll(JNIEnv *, jlong);

static void     wakeUp();

static void     update_poll_timeout(int timeout_control);

static uint32_t get_poll_timeout(jlong nextTaskTime);

// Defines

#ifndef bzero

#define bzero(a,b) memset(a, 0, b)

#endif

#define AWT_POLL_BUFSIZE        100 /* bytes */

#define AWT_READPIPE            (awt_pipe_fds[0])

#define AWT_WRITEPIPE           (awt_pipe_fds[1])

#define DEF_AWT_MAX_POLL_TIMEOUT ((uint32_t)500) /* milliseconds */

#define DEF_AWT_FLUSH_TIMEOUT ((uint32_t)100) /* milliseconds */

#define AWT_MIN_POLL_TIMEOUT ((uint32_t)0) /* milliseconds */

#define TIMEOUT_TIMEDOUT 0

#define TIMEOUT_EVENTS 1

/* awt_poll_alg - AWT Poll Events Aging Algorithms */

#define AWT_POLL_FALSE        1

#define AWT_POLL_AGING_SLOW   2

#define AWT_POLL_AGING_FAST   3

#define AWT_POLL_THRESHOLD 1000  // msec, Block if delay is larger

#define AWT_POLL_BLOCK       -1  // cause poll() block

// Static fields

static int          awt_poll_alg = AWT_POLL_AGING_SLOW;

static uint32_t AWT_FLUSH_TIMEOUT  =  DEF_AWT_FLUSH_TIMEOUT; /* milliseconds */

static uint32_t AWT_MAX_POLL_TIMEOUT = DEF_AWT_MAX_POLL_TIMEOUT; /* milliseconds */

static pthread_t    awt_MainThread = 0;

static int32_t      awt_pipe_fds[2];                   /* fds for wkaeup pipe */

static Boolean      awt_pipe_inited = False;           /* make sure pipe is initialized before write */

static jlong        awt_next_flush_time = 0LL; /* 0 == no scheduled flush */

static jlong        awt_last_flush_time = 0LL; /* 0 == no scheduled flush */

static uint32_t     curPollTimeout;

static struct pollfd pollFds[2];

static jlong        poll_sleep_time = 0LL; // Used for tracing

static jlong        poll_wakeup_time = 0LL; // Used for tracing

// AWT static poll timeout.  Zero means "not set", aging algorithm is

// used.  Static poll timeout values higher than 50 cause application

// look "slow" - they don't respond to user request fast

// enough. Static poll timeout value less than 10 are usually

// considered by schedulers as zero, so this might cause unnecessary

// CPU consumption by Java.  The values between 10 - 50 are suggested

// for single client desktop configurations.  For SunRay servers, it

// is highly recomended to use aging algorithm (set static poll timeout

// to 0).

static int32_t static_poll_timeout = 0;

static Bool isMainThread() {

    return awt_MainThread == pthread_self();

}

/*

 * Creates the AWT utility pipe. This pipe exists solely so that

 * we can cause the main event thread to wake up from a poll() or

 * select() by writing to this pipe.

 */

static void

awt_pipe_init() {

    if (awt_pipe_inited) {

        return;

    }

    if ( pipe ( awt_pipe_fds ) == 0 )

    {

        /*

        ** the write wakes us up from the infinite sleep, which

        ** then we cause a delay of AWT_FLUSHTIME and then we

        ** flush.

        */

        int32_t flags = 0;

        /* set the pipe to be non-blocking */

        flags = fcntl ( AWT_READPIPE, F_GETFL, 0 );

        fcntl( AWT_READPIPE, F_SETFL, flags | O_NDELAY | O_NONBLOCK );

        flags = fcntl ( AWT_WRITEPIPE, F_GETFL, 0 );

        fcntl( AWT_WRITEPIPE, F_SETFL, flags | O_NDELAY | O_NONBLOCK );

        awt_pipe_inited = True;

    }

    else

    {

        AWT_READPIPE = -1;

        AWT_WRITEPIPE = -1;

    }

} /* awt_pipe_init() */

/**

 * Reads environment variables to initialize timeout fields.

 */

static void readEnv() {

    char * value;

    int tmp_poll_alg;

    static Boolean env_read = False;

    if (env_read) return;

    env_read = True;

    value = getenv("_AWT_MAX_POLL_TIMEOUT");

    if (value != NULL) {

        AWT_MAX_POLL_TIMEOUT = atoi(value);

        if (AWT_MAX_POLL_TIMEOUT == 0) {

            AWT_MAX_POLL_TIMEOUT = DEF_AWT_MAX_POLL_TIMEOUT;

        }

    }

    curPollTimeout = AWT_MAX_POLL_TIMEOUT/2;

    value = getenv("_AWT_FLUSH_TIMEOUT");

    if (value != NULL) {

        AWT_FLUSH_TIMEOUT = atoi(value);

        if (AWT_FLUSH_TIMEOUT == 0) {

            AWT_FLUSH_TIMEOUT = DEF_AWT_FLUSH_TIMEOUT;

        }

    }

    value = getenv("_AWT_POLL_TRACING");

    if (value != NULL) {

        tracing = atoi(value);

    }

    value = getenv("_AWT_STATIC_POLL_TIMEOUT");

    if (value != NULL) {

        static_poll_timeout = atoi(value);

    }

    if (static_poll_timeout != 0) {

        curPollTimeout = static_poll_timeout;

    }

    // non-blocking poll()

    value = getenv("_AWT_POLL_ALG");

    if (value != NULL) {

        tmp_poll_alg = atoi(value);

        switch(tmp_poll_alg) {

        case AWT_POLL_FALSE:

        case AWT_POLL_AGING_SLOW:

        case AWT_POLL_AGING_FAST:

            awt_poll_alg = tmp_poll_alg;

            break;

        default:

            PRINT("Unknown value of _AWT_POLL_ALG, assuming Slow Aging Algorithm by default");

            awt_poll_alg = AWT_POLL_AGING_SLOW;

            break;

        }

    }

}

/**

 * Returns the amount of milliseconds similar to System.currentTimeMillis()

 */

static jlong

awtJNI_TimeMillis(void)

{

    struct timeval t;

    gettimeofday(&t, 0);

    return jlong_add(jlong_mul(jint_to_jlong(t.tv_sec), jint_to_jlong(1000)),

             jint_to_jlong(t.tv_usec / 1000));

}

/**

 * Updates curPollTimeout according to the aging algorithm.

 * @param timeout_control Either TIMEOUT_TIMEDOUT or TIMEOUT_EVENTS