Java example source code file (XToolkit.c)
The XToolkit.c Java example source code
/*
* Copyright (c) 2002, 2013, 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_Font.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);
struct XFontPeerIDs xFontPeerIDs;
JNIEXPORT void JNICALL
Java_sun_awt_X11_XFontPeer_initIDs
(JNIEnv *env, jclass cls)
{
xFontPeerIDs.xfsname =
(*env)->GetFieldID(env, cls, "xfsname", "Ljava/lang/String;");
}
#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");
awt_NumLockMask = (*env)->GetStaticIntField(env, clazz, fid);
DTRACE_PRINTLN1("awt_NumLockMask = %u", awt_NumLockMask);
fid = (*env)->GetStaticFieldID(env, clazz, "modLockIsShiftLock", "I");
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)
{
#ifndef JAVASE_EMBEDDED
return (jlong) 2000;
#else
return (jlong) 10000;
#endif
}
/*
* 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
JNI_OnLoad(JavaVM *vm, void *reserved)
{
jvm = vm;
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");
componentIDs.y = (*env)->GetFieldID(env, cls, "y", "I");
componentIDs.width = (*env)->GetFieldID(env, cls, "width", "I");
componentIDs.height = (*env)->GetFieldID(env, cls, "height", "I");
componentIDs.isPacked = (*env)->GetFieldID(env, cls, "isPacked", "Z");
componentIDs.peer =
(*env)->GetFieldID(env, cls, "peer", "Ljava/awt/peer/ComponentPeer;");
componentIDs.background =
(*env)->GetFieldID(env, cls, "background", "Ljava/awt/Color;");
componentIDs.foreground =
(*env)->GetFieldID(env, cls, "foreground", "Ljava/awt/Color;");
componentIDs.graphicsConfig =
(*env)->GetFieldID(env, cls, "graphicsConfig",
"Ljava/awt/GraphicsConfiguration;");
componentIDs.name =
(*env)->GetFieldID(env, cls, "name", "Ljava/lang/String;");
/* 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;");
componentIDs.getLocationOnScreen =
(*env)->GetMethodID(env, cls, "getLocationOnScreen_NoTreeLock",
"()Ljava/awt/Point;");
keyclass = (*env)->FindClass(env, "java/awt/event/KeyEvent");
if (JNU_IsNull(env, keyclass)) {
return;
}
componentIDs.isProxyActive =
(*env)->GetFieldID(env, keyclass, "isProxyActive",
"Z");
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 void processOneEvent(XtInputMask iMask);
static void 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])
#ifdef JAVASE_EMBEDDED
#define DEF_AWT_MAX_POLL_TIMEOUT ((uint32_t)4000000000) /* milliseconds */
#else
#define DEF_AWT_MAX_POLL_TIMEOUT ((uint32_t)500) /* milliseconds */
#endif
#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
#ifdef JAVASE_EMBEDDED
static int awt_poll_alg = AWT_POLL_AGING_FAST;
#else
static int awt_poll_alg = AWT_POLL_AGING_SLOW;
#endif
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
*/
static void update_poll_timeout(int timeout_control) {
PRINT2("tout: %d\n", timeout_control);
// If static_poll_timeout is set, curPollTimeout has the fixed value
if (static_poll_timeout != 0) return;
// Update it otherwise
switch(awt_poll_alg) {
case AWT_POLL_AGING_SLOW:
if (timeout_control == TIMEOUT_TIMEDOUT) {
/* add 1/4 (plus 1, in case the division truncates to 0) */
curPollTimeout += ((curPollTimeout>>2) + 1);
curPollTimeout = min(AWT_MAX_POLL_TIMEOUT, curPollTimeout);
} else if (timeout_control == TIMEOUT_EVENTS) {
/* subtract 1/4 (plus 1, in case the division truncates to 0) */
curPollTimeout -= ((curPollTimeout>>2) + 1);
curPollTimeout = max(AWT_MIN_POLL_TIMEOUT, curPollTimeout);
}
break;
case AWT_POLL_AGING_FAST:
if (timeout_control == TIMEOUT_TIMEDOUT) {
curPollTimeout += ((curPollTimeout>>2) + 1);
curPollTimeout = min(AWT_MAX_POLL_TIMEOUT, curPollTimeout);
if((int)curPollTimeout > AWT_POLL_THRESHOLD || (int)curPollTimeout == AWT_POLL_BLOCK)
curPollTimeout = AWT_POLL_BLOCK;
} else if (timeout_control == TIMEOUT_EVENTS) {
curPollTimeout = max(AWT_MIN_POLL_TIMEOUT, 1);
}
break;
}
}
/*
* Gets the best timeout for the next call to poll().
*
* @param nextTaskTime -1, if there are no tasks; next time when
* timeout task needs to be run, in millis(of currentTimeMillis)
*/
static uint32_t get_poll_timeout(jlong nextTaskTime)
{
uint32_t ret_timeout;
uint32_t timeout;
uint32_t taskTimeout;
uint32_t flushTimeout;
jlong curTime = awtJNI_TimeMillis();
timeout = curPollTimeout;
switch(awt_poll_alg) {
case AWT_POLL_AGING_SLOW:
case AWT_POLL_AGING_FAST:
taskTimeout = (nextTaskTime == -1) ? AWT_MAX_POLL_TIMEOUT : (uint32_t)max(0, (int32_t)(nextTaskTime - curTime));
flushTimeout = (awt_next_flush_time > 0) ? (uint32_t)max(0, (int32_t)(awt_next_flush_time - curTime)) : AWT_MAX_POLL_TIMEOUT;
PRINT2("to: %d, ft: %d, to: %d, tt: %d, mil: %d\n", taskTimeout, flushTimeout, timeout, (int)nextTaskTime, (int)curTime);
// Adjust timeout to flush_time and task_time
ret_timeout = min(flushTimeout, min(taskTimeout, timeout));
if((int)curPollTimeout == AWT_POLL_BLOCK)
ret_timeout = AWT_POLL_BLOCK;
break;
case AWT_POLL_FALSE:
ret_timeout = (nextTaskTime > curTime) ?
(nextTaskTime - curTime) :
((nextTaskTime == -1) ? -1 : 0);
break;
}
return ret_timeout;
} /* get_poll_timeout() */
/*
* Waits for X/Xt events to appear on the pipe. Returns only when
* it is likely (but not definite) that there are events waiting to
* be processed.
*
* This routine also flushes the outgoing X queue, when the
* awt_next_flush_time has been reached.
*
* If fdAWTPipe is greater or equal than zero the routine also
* checks if there are events pending on the putback queue.
*/
void
waitForEvents(JNIEnv *env, jlong nextTaskTime) {
performPoll(env, nextTaskTime);
if ((awt_next_flush_time > 0) && (awtJNI_TimeMillis() >= awt_next_flush_time)) {
XFlush(awt_display);
awt_last_flush_time = awt_next_flush_time;
awt_next_flush_time = 0LL;
}
} /* waitForEvents() */
JNIEXPORT void JNICALL Java_sun_awt_X11_XToolkit_waitForEvents (JNIEnv *env, jclass class, jlong nextTaskTime) {
waitForEvents(env, nextTaskTime);
}
JNIEXPORT void JNICALL Java_sun_awt_X11_XToolkit_awt_1toolkit_1init (JNIEnv *env, jclass class) {
awt_MainThread = pthread_self();
awt_pipe_init();
readEnv();
}
JNIEXPORT void JNICALL Java_sun_awt_X11_XToolkit_awt_1output_1flush (JNIEnv *env, jclass class) {
awt_output_flush();
}
JNIEXPORT void JNICALL Java_sun_awt_X11_XToolkit_wakeup_1poll (JNIEnv *env, jclass class) {
wakeUp();
}
/*
* Polls both the X pipe and our AWT utility pipe. Returns
* when there is data on one of the pipes, or the operation times
* out.
*
* Not all Xt events come across the X pipe (e.g., timers
* and alternate inputs), so we must time out every now and
* then to check the Xt event queue.
*
* The fdAWTPipe will be empty when this returns.
*/
static void
performPoll(JNIEnv *env, jlong nextTaskTime) {
static Bool pollFdsInited = False;
static char read_buf[AWT_POLL_BUFSIZE + 1]; /* dummy buf to empty pipe */
uint32_t timeout = get_poll_timeout(nextTaskTime);
int32_t result;
if (!pollFdsInited) {
pollFds[0].fd = ConnectionNumber(awt_display);
pollFds[0].events = POLLRDNORM;
pollFds[0].revents = 0;
pollFds[1].fd = AWT_READPIPE;
pollFds[1].events = POLLRDNORM;
pollFds[1].revents = 0;
pollFdsInited = True;
} else {
pollFds[0].revents = 0;
pollFds[1].revents = 0;
}
AWT_NOFLUSH_UNLOCK();
/* ACTUALLY DO THE POLL() */
if (timeout == 0) {
// be sure other threads get a chance
awtJNI_ThreadYield(env);
}
if (tracing) poll_sleep_time = awtJNI_TimeMillis();
result = poll( pollFds, 2, (int32_t) timeout );
if (tracing) poll_wakeup_time = awtJNI_TimeMillis();
PRINT("%d of %d, res: %d\n", (int)(poll_wakeup_time-poll_sleep_time), (int)timeout, result);
AWT_LOCK();
if (result == 0) {
/* poll() timed out -- update timeout value */
update_poll_timeout(TIMEOUT_TIMEDOUT);
PRINT2("performPoll(): TIMEOUT_TIMEDOUT curPollTimeout = %d \n", curPollTimeout);
}
if (pollFds[1].revents) {
int count;
PRINT("Woke up\n");
/* There is data on the AWT pipe - empty it */
do {
count = read(AWT_READPIPE, read_buf, AWT_POLL_BUFSIZE );
} while (count == AWT_POLL_BUFSIZE );
PRINT2("performPoll(): data on the AWT pipe: curPollTimeout = %d \n", curPollTimeout);
}
if (pollFds[0].revents) {
// Events in X pipe
update_poll_timeout(TIMEOUT_EVENTS);
PRINT2("performPoll(): TIMEOUT_EVENTS curPollTimeout = %ld \n", curPollTimeout);
}
return;
} /* performPoll() */
/**
* Schedules next auto-flush event or performs forced flush depending
* on the time of the previous flush.
*/
void awt_output_flush() {
if (awt_next_flush_time == 0) {
JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
jlong curTime = awtJNI_TimeMillis(); // current time
jlong l_awt_last_flush_time = awt_last_flush_time; // last time we flushed queue
jlong next_flush_time = l_awt_last_flush_time + AWT_FLUSH_TIMEOUT;
if (curTime >= next_flush_time) {
// Enough time passed from last flush
PRINT("f1\n");
AWT_LOCK();
XFlush(awt_display);
awt_last_flush_time = curTime;
AWT_NOFLUSH_UNLOCK();
} else {
awt_next_flush_time = next_flush_time;
PRINT("f2\n");
wakeUp();
}
}
}
/**
* Wakes-up poll() in performPoll
*/
static void wakeUp() {
static char wakeUp_char = 'p';
if (!isMainThread() && awt_pipe_inited) {
write ( AWT_WRITEPIPE, &wakeUp_char, 1 );
}
}
/* ========================== End poll section ================================= */
/*
* Class: java_awt_KeyboardFocusManager
* Method: initIDs
* Signature: ()V
*/
JNIEXPORT void JNICALL
Java_java_awt_KeyboardFocusManager_initIDs
(JNIEnv *env, jclass cls)
{
}
/*
* Class: sun_awt_X11_XToolkit
* Method: getEnv
* Signature: (Ljava/lang/String;)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_sun_awt_X11_XToolkit_getEnv
(JNIEnv *env , jclass clazz, jstring key) {
char *ptr = NULL;
const char *keystr = NULL;
jstring ret = NULL;
keystr = JNU_GetStringPlatformChars(env, key, NULL);
if (keystr) {
ptr = getenv(keystr);
if (ptr) {
ret = JNU_NewStringPlatform(env, (const char *) ptr);
}
JNU_ReleaseStringPlatformChars(env, key, (const char*)keystr);
}
return ret;
}
#ifdef __linux__
void print_stack(void)
{
void *array[10];
size_t size;
char **strings;
size_t i;
size = backtrace (array, 10);
strings = backtrace_symbols (array, size);
fprintf (stderr, "Obtained %zd stack frames.\n", size);
for (i = 0; i < size; i++)
fprintf (stderr, "%s\n", strings[i]);
free (strings);
}
#endif
Window get_xawt_root_shell(JNIEnv *env) {
static jclass classXRootWindow = NULL;
static jmethodID methodGetXRootWindow = NULL;
static Window xawt_root_shell = None;
if (xawt_root_shell == None){
if (classXRootWindow == NULL){
jclass cls_tmp = (*env)->FindClass(env, "sun/awt/X11/XRootWindow");
if (!JNU_IsNull(env, cls_tmp)) {
classXRootWindow = (jclass)(*env)->NewGlobalRef(env, cls_tmp);
(*env)->DeleteLocalRef(env, cls_tmp);
}
}
if( classXRootWindow != NULL) {
methodGetXRootWindow = (*env)->GetStaticMethodID(env, classXRootWindow, "getXRootWindow", "()J");
}
if( classXRootWindow != NULL && methodGetXRootWindow !=NULL ) {
xawt_root_shell = (Window) (*env)->CallStaticLongMethod(env, classXRootWindow, methodGetXRootWindow);
}
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
}
return xawt_root_shell;
}
/*
* Old, compatibility, backdoor for DT. This is a different
* implementation. It keeps the signature, but acts on
* awt_root_shell, not the frame passed as an argument. Note, that
* the code that uses the old backdoor doesn't work correctly with
* gnome session proxy that checks for WM_COMMAND when the window is
* firts mapped, because DT code calls this old backdoor *after* the
* frame is shown or it would get NPE with old AWT (previous
* implementation of this backdoor) otherwise. Old style session
* managers (e.g. CDE) that check WM_COMMAND only during session
* checkpoint should work fine, though.
*
* NB: The function name looks deceptively like a JNI native method
* name. It's not! It's just a plain function.
*/
JNIEXPORT void JNICALL
Java_sun_awt_motif_XsessionWMcommand(JNIEnv *env, jobject this,
jobject frame, jstring jcommand)
{
const char *command;
XTextProperty text_prop;
char *c[1];
int32_t status;
Window xawt_root_window;
AWT_LOCK();
xawt_root_window = get_xawt_root_shell(env);
if ( xawt_root_window == None ) {
JNU_ThrowNullPointerException(env, "AWT root shell is unrealized");
AWT_UNLOCK();
return;
}
command = (char *) JNU_GetStringPlatformChars(env, jcommand, NULL);
c[0] = (char *)command;
status = XmbTextListToTextProperty(awt_display, c, 1,
XStdICCTextStyle, &text_prop);
if (status == Success || status > 0) {
XSetTextProperty(awt_display, xawt_root_window,
&text_prop, XA_WM_COMMAND);
if (text_prop.value != NULL)
XFree(text_prop.value);
}
JNU_ReleaseStringPlatformChars(env, jcommand, command);
AWT_UNLOCK();
}
/*
* New DT backdoor to set WM_COMMAND. New code should use this
* backdoor and call it *before* the first frame is shown so that
* gnome session proxy can correctly handle it.
*
* NB: The function name looks deceptively like a JNI native method
* name. It's not! It's just a plain function.
*/
JNIEXPORT void JNICALL
Java_sun_awt_motif_XsessionWMcommand_New(JNIEnv *env, jobjectArray jargv)
{
static const char empty[] = "";
int argc;
const char **cargv;
XTextProperty text_prop;
int status;
int i;
Window xawt_root_window;
AWT_LOCK();
xawt_root_window = get_xawt_root_shell(env);
if (xawt_root_window == None) {
JNU_ThrowNullPointerException(env, "AWT root shell is unrealized");
AWT_UNLOCK();
return;
}
argc = (int)(*env)->GetArrayLength(env, jargv);
if (argc == 0) {
AWT_UNLOCK();
return;
}
/* array of C strings */
cargv = (const char **)calloc(argc, sizeof(char *));
if (cargv == NULL) {
JNU_ThrowOutOfMemoryError(env, "Unable to allocate cargv");
AWT_UNLOCK();
return;
}
/* fill C array with platform chars of java strings */
for (i = 0; i < argc; ++i) {
jstring js;
const char *cs;
cs = NULL;
js = (*env)->GetObjectArrayElement(env, jargv, i);
if (js != NULL) {
cs = JNU_GetStringPlatformChars(env, js, NULL);
}
if (cs == NULL) {
cs = empty;
}
cargv[i] = cs;
(*env)->DeleteLocalRef(env, js);
}
/* grr, X prototype doesn't declare cargv as const, thought it really is */
status = XmbTextListToTextProperty(awt_display, (char **)cargv, argc,
XStdICCTextStyle, &text_prop);
if (status < 0) {
switch (status) {
case XNoMemory:
JNU_ThrowOutOfMemoryError(env,
"XmbTextListToTextProperty: XNoMemory");
break;
case XLocaleNotSupported:
JNU_ThrowInternalError(env,
"XmbTextListToTextProperty: XLocaleNotSupported");
break;
case XConverterNotFound:
JNU_ThrowNullPointerException(env,
"XmbTextListToTextProperty: XConverterNotFound");
break;
default:
JNU_ThrowInternalError(env,
"XmbTextListToTextProperty: unknown error");
}
} else {
XSetTextProperty(awt_display, xawt_root_window,
&text_prop, XA_WM_COMMAND);
}
for (i = 0; i < argc; ++i) {
jstring js;
if (cargv[i] == empty)
continue;
js = (*env)->GetObjectArrayElement(env, jargv, i);
JNU_ReleaseStringPlatformChars(env, js, cargv[i]);
(*env)->DeleteLocalRef(env, js);
}
if (text_prop.value != NULL)
XFree(text_prop.value);
AWT_UNLOCK();
}
/*
* Class: java_awt_TrayIcon
* Method: initIDs
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_java_awt_TrayIcon_initIDs(JNIEnv *env , jclass clazz)
{
}
/*
* Class: java_awt_Cursor
* Method: finalizeImpl
* Signature: ()V
*/
JNIEXPORT void JNICALL
Java_java_awt_Cursor_finalizeImpl(JNIEnv *env, jclass clazz, jlong pData)
{
Cursor xcursor;
xcursor = (Cursor)pData;
if (xcursor != None) {
AWT_LOCK();
XFreeCursor(awt_display, xcursor);
AWT_UNLOCK();
}
}
/*
* Class: sun_awt_X11_XToolkit
* Method: getNumberOfButtonsImpl
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_sun_awt_X11_XToolkit_getNumberOfButtonsImpl
(JNIEnv * env, jobject cls){
if (num_buttons == 0) {
num_buttons = getNumButtons();
}
return num_buttons;
}
int32_t getNumButtons() {
int32_t major_opcode, first_event, first_error;
int32_t xinputAvailable;
int32_t numDevices, devIdx, clsIdx;
XDeviceInfo* devices;
XDeviceInfo* aDevice;
XButtonInfo* bInfo;
int32_t local_num_buttons = 0;
/* 4700242:
* If XTest is asked to press a non-existant mouse button
* (i.e. press Button3 on a system configured with a 2-button mouse),
* then a crash may happen. To avoid this, we use the XInput
* extension to query for the number of buttons on the XPointer, and check
* before calling XTestFakeButtonEvent().
*/
xinputAvailable = XQueryExtension(awt_display, INAME, &major_opcode, &first_event, &first_error);
DTRACE_PRINTLN3("RobotPeer: XQueryExtension(XINPUT) returns major_opcode = %d, first_event = %d, first_error = %d",
major_opcode, first_event, first_error);
if (xinputAvailable) {
devices = XListInputDevices(awt_display, &numDevices);
for (devIdx = 0; devIdx < numDevices; devIdx++) {
aDevice = &(devices[devIdx]);
#ifdef IsXExtensionPointer
if (aDevice->use == IsXExtensionPointer) {
for (clsIdx = 0; clsIdx < aDevice->num_classes; clsIdx++) {
if (aDevice->inputclassinfo[clsIdx].class == ButtonClass) {
bInfo = (XButtonInfo*)(&(aDevice->inputclassinfo[clsIdx]));
local_num_buttons = bInfo->num_buttons;
DTRACE_PRINTLN1("RobotPeer: XPointer has %d buttons", num_buttons);
break;
}
}
break;
}
#endif
if (local_num_buttons <= 0 ) {
if (aDevice->use == IsXPointer) {
for (clsIdx = 0; clsIdx < aDevice->num_classes; clsIdx++) {
if (aDevice->inputclassinfo[clsIdx].class == ButtonClass) {
bInfo = (XButtonInfo*)(&(aDevice->inputclassinfo[clsIdx]));
local_num_buttons = bInfo->num_buttons;
DTRACE_PRINTLN1("RobotPeer: XPointer has %d buttons", num_buttons);
break;
}
}
break;
}
}
}
XFreeDeviceList(devices);
}
else {
DTRACE_PRINTLN1("RobotPeer: XINPUT extension is unavailable, assuming %d mouse buttons", num_buttons);
}
if (local_num_buttons == 0 ) {
local_num_buttons = 3;
}
return local_num_buttons;
}
/*
* Class: sun_awt_X11_XWindowPeer
* Method: getJvmPID
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_sun_awt_X11_XWindowPeer_getJvmPID
(JNIEnv *env, jclass cls)
{
/* Return the JVM's PID. */
return getpid();
}
#ifndef HOST_NAME_MAX
#define HOST_NAME_MAX 1024 /* Overestimated */
#endif
/*
* Class: sun_awt_X11_XWindowPeer
* Method: getLocalHostname
* Signature: ()Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_sun_awt_X11_XWindowPeer_getLocalHostname
(JNIEnv *env, jclass cls)
{
/* Return the machine's FQDN. */
char hostname[HOST_NAME_MAX + 1];
if (gethostname(hostname, HOST_NAME_MAX + 1) == 0) {
hostname[HOST_NAME_MAX] = '\0';
jstring res = (*env)->NewStringUTF(env, hostname);
return res;
}
return (jstring)NULL;
}
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