J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #ifdef HEADLESS |
| 27 | #error This file should not be included in headless library |
| 28 | #endif |
| 29 | |
| 30 | #include <Xm/Display.h> |
| 31 | #include "awt_Component.h" |
| 32 | #include "awt_Cursor.h" |
| 33 | #include "java_awt_Cursor.h" |
| 34 | #include <X11/cursorfont.h> |
| 35 | |
| 36 | #include "jni.h" |
| 37 | #include "jni_util.h" |
| 38 | |
| 39 | /* fieldIDs for Cursor fields that may be accessed from C */ |
| 40 | struct CursorIDs cursorIDs; |
| 41 | extern struct MComponentPeerIDs mComponentPeerIDs; |
| 42 | |
| 43 | static jweak curComp = 0; |
| 44 | |
| 45 | /* |
| 46 | * Class: java_awt_Cursor |
| 47 | * Method: initIDs |
| 48 | * Signature: ()V |
| 49 | */ |
| 50 | /* |
| 51 | * This function gets called from the static initializer for Cursor.java |
| 52 | * to initialize the fieldIDs for fields that may be accessed from C |
| 53 | */ |
| 54 | JNIEXPORT void JNICALL |
| 55 | Java_java_awt_Cursor_initIDs(JNIEnv *env, jclass cls) |
| 56 | { |
| 57 | cursorIDs.type = (*env)->GetFieldID(env, cls, "type", "I"); |
| 58 | cursorIDs.mSetPData = (*env)->GetMethodID(env, cls, "setPData", "(J)V"); |
| 59 | cursorIDs.pData = (*env)->GetFieldID(env, cls, "pData", "J"); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * A utility to retrieve cursor from java.awt.Cursor |
| 64 | * Create and save the cursor first if it is not yet |
| 65 | */ |
| 66 | Cursor getCursor(JNIEnv *env, jobject jCur) |
| 67 | { |
| 68 | int32_t cursorType = 0; |
| 69 | Cursor xcursor; |
| 70 | |
| 71 | xcursor = (Cursor)(*env)->GetLongField(env, jCur, cursorIDs.pData); |
| 72 | |
| 73 | if (xcursor != None) { |
| 74 | return xcursor; |
| 75 | } |
| 76 | |
| 77 | cursorType = (*env)->GetIntField(env, jCur, cursorIDs.type); |
| 78 | |
| 79 | DASSERT(cursorType != java_awt_Cursor_CUSTOM_CURSOR); |
| 80 | |
| 81 | switch (cursorType) { |
| 82 | case java_awt_Cursor_DEFAULT_CURSOR: |
| 83 | cursorType = XC_left_ptr; |
| 84 | break; |
| 85 | case java_awt_Cursor_CROSSHAIR_CURSOR: |
| 86 | cursorType = XC_crosshair; |
| 87 | break; |
| 88 | case java_awt_Cursor_TEXT_CURSOR: |
| 89 | cursorType = XC_xterm; |
| 90 | break; |
| 91 | case java_awt_Cursor_WAIT_CURSOR: |
| 92 | cursorType = XC_watch; |
| 93 | break; |
| 94 | case java_awt_Cursor_SW_RESIZE_CURSOR: |
| 95 | cursorType = XC_bottom_left_corner; |
| 96 | break; |
| 97 | case java_awt_Cursor_NW_RESIZE_CURSOR: |
| 98 | cursorType = XC_top_left_corner; |
| 99 | break; |
| 100 | case java_awt_Cursor_SE_RESIZE_CURSOR: |
| 101 | cursorType = XC_bottom_right_corner; |
| 102 | break; |
| 103 | case java_awt_Cursor_NE_RESIZE_CURSOR: |
| 104 | cursorType = XC_top_right_corner; |
| 105 | break; |
| 106 | case java_awt_Cursor_S_RESIZE_CURSOR: |
| 107 | cursorType = XC_bottom_side; |
| 108 | break; |
| 109 | case java_awt_Cursor_N_RESIZE_CURSOR: |
| 110 | cursorType = XC_top_side; |
| 111 | break; |
| 112 | case java_awt_Cursor_W_RESIZE_CURSOR: |
| 113 | cursorType = XC_left_side; |
| 114 | break; |
| 115 | case java_awt_Cursor_E_RESIZE_CURSOR: |
| 116 | cursorType = XC_right_side; |
| 117 | break; |
| 118 | case java_awt_Cursor_HAND_CURSOR: |
| 119 | cursorType = XC_hand2; |
| 120 | break; |
| 121 | case java_awt_Cursor_MOVE_CURSOR: |
| 122 | cursorType = XC_fleur; |
| 123 | break; |
| 124 | } |
| 125 | xcursor = XCreateFontCursor(awt_display, cursorType); |
| 126 | |
| 127 | (*env)->CallVoidMethod(env, jCur, cursorIDs.mSetPData, xcursor); |
| 128 | return xcursor; |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * Class: java_awt_Cursor |
| 133 | * Method: finalizeImpl |
| 134 | * Signature: ()V |
| 135 | */ |
| 136 | JNIEXPORT void JNICALL |
| 137 | Java_java_awt_Cursor_finalizeImpl(JNIEnv *env, jclass clazz, jlong pData) |
| 138 | { |
| 139 | Cursor xcursor; |
| 140 | |
| 141 | xcursor = (Cursor)pData; |
| 142 | if (xcursor != None) { |
| 143 | AWT_LOCK(); |
| 144 | XFreeCursor(awt_display, xcursor); |
| 145 | AWT_UNLOCK(); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * normal replace : CACHE_UDPATE => update curComp and updateCursor |
| 151 | * not replace : UPDATE_ONLY => intact curComp but updateCursor |
| 152 | * only replace : CACHE_ONLY => update curComp only, not updateCursor |
| 153 | * |
| 154 | * This function should only be called under AWT_LOCK(). Otherwise |
| 155 | * multithreaded access can corrupt the value of curComp variable. |
| 156 | */ |
| 157 | void updateCursor(XPointer client_data, int32_t replace) { |
| 158 | |
| 159 | static jclass globalCursorManagerClass = NULL; |
| 160 | static jmethodID updateCursorID = NULL; |
| 161 | |
| 162 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 163 | jobject peer = (jobject) client_data; |
| 164 | jobject target; |
| 165 | |
| 166 | if ((*env)->PushLocalFrame(env, 16) < 0) |
| 167 | return; |
| 168 | |
| 169 | target = (*env)->GetObjectField(env, peer, mComponentPeerIDs.target); |
| 170 | if (replace != UPDATE_ONLY) { |
| 171 | if (!JNU_IsNull(env, curComp)) { |
| 172 | (*env)->DeleteWeakGlobalRef(env, curComp); |
| 173 | } |
| 174 | curComp = (*env)->NewWeakGlobalRef(env, target); |
| 175 | if (replace == CACHE_ONLY) { |
| 176 | (*env)->PopLocalFrame(env, 0); |
| 177 | return; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Initialize our java identifiers once. Checking before locking |
| 182 | * is a huge performance win. |
| 183 | */ |
| 184 | if (globalCursorManagerClass == NULL) { |
| 185 | jobject sysClass = (*env)->FindClass(env, "sun/awt/motif/MGlobalCursorManager"); |
| 186 | if (sysClass != NULL) { |
| 187 | /* Make this class 'sticky', we don't want it GC'd */ |
| 188 | globalCursorManagerClass = (*env)->NewGlobalRef(env, sysClass); |
| 189 | |
| 190 | updateCursorID = (*env)->GetStaticMethodID(env, |
| 191 | globalCursorManagerClass, |
| 192 | "nativeUpdateCursor", |
| 193 | "(Ljava/awt/Component;)V" |
| 194 | ); |
| 195 | } |
| 196 | if (JNU_IsNull(env, globalCursorManagerClass) || updateCursorID == NULL) { |
| 197 | JNU_ThrowClassNotFoundException(env, "sun/awt/motif/MGlobalCursorManager"); |
| 198 | (*env)->PopLocalFrame(env, 0); |
| 199 | return; |
| 200 | } |
| 201 | } /* globalCursorManagerClass == NULL*/ |
| 202 | |
| 203 | (*env)->CallStaticVoidMethod(env, globalCursorManagerClass, |
| 204 | updateCursorID, target); |
| 205 | DASSERT(!((*env)->ExceptionOccurred(env))); |
| 206 | (*env)->PopLocalFrame(env, 0); |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Only call this function under AWT_LOCK(). Otherwise multithreaded |
| 211 | * access can corrupt the value of curComp variable. |
| 212 | */ |
| 213 | jobject getCurComponent() { |
| 214 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 215 | return (*env)->NewLocalRef(env, curComp); |
| 216 | } |