/* * Copyright 1998-2005 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. */ #ifdef HEADLESS #error This file should not be included in headless library #endif #include #include "awt_Component.h" #include "awt_Cursor.h" #include "java_awt_Cursor.h" #include #include "jni.h" #include "jni_util.h" /* fieldIDs for Cursor fields that may be accessed from C */ struct CursorIDs cursorIDs; extern struct MComponentPeerIDs mComponentPeerIDs; static jweak curComp = 0; /* * Class: java_awt_Cursor * Method: initIDs * Signature: ()V */ /* * This function gets called from the static initializer for Cursor.java * to initialize the fieldIDs for fields that may be accessed from C */ JNIEXPORT void JNICALL Java_java_awt_Cursor_initIDs(JNIEnv *env, jclass cls) { cursorIDs.type = (*env)->GetFieldID(env, cls, "type", "I"); cursorIDs.mSetPData = (*env)->GetMethodID(env, cls, "setPData", "(J)V"); cursorIDs.pData = (*env)->GetFieldID(env, cls, "pData", "J"); } /* * A utility to retrieve cursor from java.awt.Cursor * Create and save the cursor first if it is not yet */ Cursor getCursor(JNIEnv *env, jobject jCur) { int32_t cursorType = 0; Cursor xcursor; xcursor = (Cursor)(*env)->GetLongField(env, jCur, cursorIDs.pData); if (xcursor != None) { return xcursor; } cursorType = (*env)->GetIntField(env, jCur, cursorIDs.type); DASSERT(cursorType != java_awt_Cursor_CUSTOM_CURSOR); switch (cursorType) { case java_awt_Cursor_DEFAULT_CURSOR: cursorType = XC_left_ptr; break; case java_awt_Cursor_CROSSHAIR_CURSOR: cursorType = XC_crosshair; break; case java_awt_Cursor_TEXT_CURSOR: cursorType = XC_xterm; break; case java_awt_Cursor_WAIT_CURSOR: cursorType = XC_watch; break; case java_awt_Cursor_SW_RESIZE_CURSOR: cursorType = XC_bottom_left_corner; break; case java_awt_Cursor_NW_RESIZE_CURSOR: cursorType = XC_top_left_corner; break; case java_awt_Cursor_SE_RESIZE_CURSOR: cursorType = XC_bottom_right_corner; break; case java_awt_Cursor_NE_RESIZE_CURSOR: cursorType = XC_top_right_corner; break; case java_awt_Cursor_S_RESIZE_CURSOR: cursorType = XC_bottom_side; break; case java_awt_Cursor_N_RESIZE_CURSOR: cursorType = XC_top_side; break; case java_awt_Cursor_W_RESIZE_CURSOR: cursorType = XC_left_side; break; case java_awt_Cursor_E_RESIZE_CURSOR: cursorType = XC_right_side; break; case java_awt_Cursor_HAND_CURSOR: cursorType = XC_hand2; break; case java_awt_Cursor_MOVE_CURSOR: cursorType = XC_fleur; break; } xcursor = XCreateFontCursor(awt_display, cursorType); (*env)->CallVoidMethod(env, jCur, cursorIDs.mSetPData, xcursor); return xcursor; } /* * 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(); } } /* * normal replace : CACHE_UDPATE => update curComp and updateCursor * not replace : UPDATE_ONLY => intact curComp but updateCursor * only replace : CACHE_ONLY => update curComp only, not updateCursor * * This function should only be called under AWT_LOCK(). Otherwise * multithreaded access can corrupt the value of curComp variable. */ void updateCursor(XPointer client_data, int32_t replace) { static jclass globalCursorManagerClass = NULL; static jmethodID updateCursorID = NULL; JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); jobject peer = (jobject) client_data; jobject target; if ((*env)->PushLocalFrame(env, 16) < 0) return; target = (*env)->GetObjectField(env, peer, mComponentPeerIDs.target); if (replace != UPDATE_ONLY) { if (!JNU_IsNull(env, curComp)) { (*env)->DeleteWeakGlobalRef(env, curComp); } curComp = (*env)->NewWeakGlobalRef(env, target); if (replace == CACHE_ONLY) { (*env)->PopLocalFrame(env, 0); return; } } /* Initialize our java identifiers once. Checking before locking * is a huge performance win. */ if (globalCursorManagerClass == NULL) { jobject sysClass = (*env)->FindClass(env, "sun/awt/motif/MGlobalCursorManager"); if (sysClass != NULL) { /* Make this class 'sticky', we don't want it GC'd */ globalCursorManagerClass = (*env)->NewGlobalRef(env, sysClass); updateCursorID = (*env)->GetStaticMethodID(env, globalCursorManagerClass, "nativeUpdateCursor", "(Ljava/awt/Component;)V" ); } if (JNU_IsNull(env, globalCursorManagerClass) || updateCursorID == NULL) { JNU_ThrowClassNotFoundException(env, "sun/awt/motif/MGlobalCursorManager"); (*env)->PopLocalFrame(env, 0); return; } } /* globalCursorManagerClass == NULL*/ (*env)->CallStaticVoidMethod(env, globalCursorManagerClass, updateCursorID, target); DASSERT(!((*env)->ExceptionOccurred(env))); (*env)->PopLocalFrame(env, 0); } /* * Only call this function under AWT_LOCK(). Otherwise multithreaded * access can corrupt the value of curComp variable. */ jobject getCurComponent() { JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); return (*env)->NewLocalRef(env, curComp); }