1 /*

     2  * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 #ifdef HEADLESS

    27     #error This file should not be included in headless library

    28 #endif

    29 

    30 #include "awt_p.h"

    31 #include "awt_Component.h"

    32 

    33 #include <jni.h>

    34 #include <jni_util.h>

    35 

    36 extern int awt_numScreens;

    37 extern AwtScreenDataPtr x11Screens;

    38 extern struct ComponentIDs componentIDs;

    39 extern struct MComponentPeerIDs mComponentPeerIDs;

    40 

    41 /*

    42  * Class:     sun_awt_DefaultMouseInfoPeer

    43  * Method:    fillPointWithCoords

    44  * Signature: (Ljava/awt/Point)I

    45  */

    46 JNIEXPORT jint JNICALL

    47 Java_sun_awt_DefaultMouseInfoPeer_fillPointWithCoords(JNIEnv *env, jclass cls,

    48                                                           jobject point)

    49 {

    50      static jclass pointClass = NULL;

    51      jclass pointClassLocal;

    52      static jfieldID xID, yID;

    53      Window rootWindow, childWindow;

    54      int i;

    55      int32_t xr, yr, xw, yw;

    56      uint32_t keys;

    57      Bool pointerFound;

    58 

    59      AWT_LOCK();

    60      if (pointClass == NULL) {

    61          pointClassLocal = (*env)->FindClass(env, "java/awt/Point");

    62          DASSERT(pointClassLocal != NULL);

    63          if (pointClassLocal == NULL) {

    64              AWT_UNLOCK();

    65              return (jint)0;

    66          }

    67          pointClass = (jclass)(*env)->NewGlobalRef(env, pointClassLocal);

    68          (*env)->DeleteLocalRef(env, pointClassLocal);

    69          xID = (*env)->GetFieldID(env, pointClass, "x", "I");

    70          yID = (*env)->GetFieldID(env, pointClass, "y", "I");

    71      }

    72 

    73      for (i = 0; i < awt_numScreens; i++) {

    74          pointerFound = XQueryPointer(awt_display, x11Screens[i].root,

    75                            &rootWindow, &childWindow,

    76                            &xr, &yr, &xw, &yw, &keys);

    77          if (pointerFound) {

    78              (*env)->SetIntField(env, point, xID, xr);

    79              (*env)->SetIntField(env, point, yID, yr);

    80              AWT_UNLOCK();

    81              return (jint)i;

    82          }

    83      }

    84      /* This should never happen */

    85      DASSERT(FALSE);

    86      AWT_UNLOCK();

    87      return (jint)0;

    88 }

    89 

    90 /*

    91  * Class:     sun_awt_DefaultMouseInfoPeer

    92  * Method:    isWindowUnderMouse

    93  * Signature: (Ljava/awt/Window)Z

    94  */

    95 JNIEXPORT jboolean JNICALL Java_sun_awt_DefaultMouseInfoPeer_isWindowUnderMouse

    96   (JNIEnv * env, jclass cls, jobject window)

    97 {

    98     Window rootWindow = None, parentWindow = None, siblingWindow = None;

    99     Window * children = NULL;

   100     int i = 0;

   101     int is_the_same_screen = 0;

   102     int32_t xr = 0, yr = 0, xw = 0, yw = 0;

   103     uint32_t keys = 0;

   104     uint32_t nchildren = 0;

   105     Bool pointerFound = 0;

   106     struct FrameData *wdata = NULL;

   107     jobject winPeer = NULL;

   108 

   109     if ((*env)->EnsureLocalCapacity(env, 1) < 0) {

   110         return JNI_FALSE;

   111     }

   112     winPeer = (*env)->GetObjectField(env, window, componentIDs.peer);

   113     if (JNU_IsNull(env, winPeer)) {

   114         return JNI_FALSE;

   115     }

   116 

   117     wdata = (struct FrameData *)

   118         JNU_GetLongFieldAsPtr(env, winPeer, mComponentPeerIDs.pData);

   119     (*env)->DeleteLocalRef(env, winPeer);

   120 

   121     if (wdata == NULL) {

   122         return JNI_FALSE;

   123     }

   124 

   125     AWT_LOCK();

   126 

   127     XQueryTree(awt_display, XtWindow(wdata->winData.comp.widget),

   128                     &rootWindow, &parentWindow, &children, &nchildren);

   129 

   130     is_the_same_screen = XQueryPointer(awt_display, parentWindow,

   131             &rootWindow, &siblingWindow, &xr, &yr, &xw, &yw, &keys);

   132 

   133     if (siblingWindow == XtWindow(wdata->winData.comp.widget) && is_the_same_screen) {

   134         AWT_UNLOCK();

   135         return JNI_TRUE;

   136     }

   137 

   138     AWT_UNLOCK();

   139     return JNI_FALSE ;

   140 

   141 }