1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 // MARKER(update_precomp.py): autogen include statement, do not remove 25 #include "precompiled_accessibility_accessbridge.hxx" 26 27 //------------------------------------------------------------------------ 28 // includes 29 //------------------------------------------------------------------------ 30 31 #include <tools/prewin.h> 32 #include <wtypes.h> 33 #include <tools/postwin.h> 34 #include <rtl/process.h> 35 #include <tools/link.hxx> 36 37 #ifndef _SVAPP_HXX 38 #include <vcl/svapp.hxx> 39 #endif 40 #include <vcl/window.hxx> 41 #include <vcl/sysdata.hxx> 42 #include <uno/current_context.hxx> 43 #include <uno/environment.h> 44 #include <uno/mapping.hxx> 45 #include <com/sun/star/accessibility/AccessibleRole.hpp> 46 #include <com/sun/star/accessibility/XAccessible.hpp> 47 48 #ifndef _JVMACCESS_UNOVIRTUALMACHINE_HXX_ 49 #include "jvmaccess/unovirtualmachine.hxx" 50 #endif 51 52 #ifndef _JVMACCESS_VIRTUALMACHINE_HXX_ 53 #include "jvmaccess/virtualmachine.hxx" 54 #endif 55 56 #include <osl/diagnose.h> 57 58 using ::rtl::OUString; 59 using ::com::sun::star::uno::Mapping; 60 using ::com::sun::star::uno::Reference; 61 using ::com::sun::star::uno::RuntimeException; 62 using namespace ::com::sun::star::accessibility; 63 64 long VCLEventListenerLinkFunc(void * pInst, void * pData); 65 66 //------------------------------------------------------------------------ 67 // global vatiables 68 //------------------------------------------------------------------------ 69 70 Link g_aEventListenerLink(NULL, VCLEventListenerLinkFunc); 71 72 rtl::Reference< jvmaccess::UnoVirtualMachine > g_xUnoVirtualMachine; 73 typelib_InterfaceTypeDescription * g_pTypeDescription = NULL; 74 Mapping g_unoMapping; 75 76 jclass g_jcWindowsAccessBridgeAdapter = NULL; 77 jmethodID g_jmRegisterTopWindow = 0; 78 jmethodID g_jmRevokeTopWindow = 0; 79 80 //------------------------------------------------------------------------ 81 // functions 82 //------------------------------------------------------------------------ 83 84 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *, void *) 85 { 86 return JNI_VERSION_1_2; 87 } 88 89 JNIEXPORT jbyteArray JNICALL 90 Java_org_openoffice_accessibility_WindowsAccessBridgeAdapter_getProcessID(JNIEnv *pJNIEnv, jclass clazz) 91 { 92 // Initialize global class and method references 93 g_jcWindowsAccessBridgeAdapter = 94 static_cast< jclass > (pJNIEnv->NewGlobalRef(clazz)); 95 if (NULL == g_jcWindowsAccessBridgeAdapter) { 96 return 0; /* jni error occurred */ 97 } 98 g_jmRegisterTopWindow = 99 pJNIEnv->GetStaticMethodID(clazz, "registerTopWindow", "(ILcom/sun/star/accessibility/XAccessible;)V"); 100 if (0 == g_jmRegisterTopWindow) { 101 return 0; /* jni error occurred */ 102 } 103 g_jmRevokeTopWindow = 104 pJNIEnv->GetStaticMethodID(clazz, "revokeTopWindow", "(ILcom/sun/star/accessibility/XAccessible;)V"); 105 if (0 == g_jmRevokeTopWindow) { 106 return 0; /* jni error occurred */ 107 } 108 109 // Use the special protocol of XJavaVM.getJavaVM: If the passed in 110 // process ID has an extra 17th byte of value one, the returned any 111 // contains a pointer to a jvmaccess::UnoVirtualMachine, instead of 112 // the underlying JavaVM pointer: 113 jbyte processID[17]; 114 rtl_getGlobalProcessId(reinterpret_cast<sal_uInt8 *> (processID)); 115 // #i51265# we need a jvmaccess::UnoVirtualMachine pointer for the 116 // uno_getEnvironment() call later. 117 processID[16] = 1; 118 119 // Copy the result into a java byte[] and return. 120 jbyteArray jbaProcessID = pJNIEnv->NewByteArray(17); 121 pJNIEnv->SetByteArrayRegion(jbaProcessID, 0, 17, processID); 122 return jbaProcessID; 123 } 124 125 JNIEXPORT jboolean JNICALL 126 Java_org_openoffice_accessibility_WindowsAccessBridgeAdapter_createMapping(JNIEnv *, jclass, jlong pointer) 127 { 128 uno_Environment * pJava_environment = NULL; 129 uno_Environment * pUno_environment = NULL; 130 131 try { 132 // We get a non-refcounted pointer to a jvmaccess::VirtualMachine 133 // from the XJavaVM service (the pointer is guaranteed to be valid 134 // as long as our reference to the XJavaVM service lasts), and 135 // convert the non-refcounted pointer into a refcounted one 136 // immediately: 137 g_xUnoVirtualMachine = reinterpret_cast< jvmaccess::UnoVirtualMachine * >(pointer); 138 139 if ( g_xUnoVirtualMachine.is() ) 140 { 141 OUString sJava(RTL_CONSTASCII_USTRINGPARAM("java")); 142 uno_getEnvironment(&pJava_environment, sJava.pData, g_xUnoVirtualMachine.get()); 143 144 OUString sCppu_current_lb_name(RTL_CONSTASCII_USTRINGPARAM(CPPU_CURRENT_LANGUAGE_BINDING_NAME)); 145 uno_getEnvironment(&pUno_environment, sCppu_current_lb_name.pData, NULL); 146 147 if ( pJava_environment && pUno_environment ) 148 { 149 g_unoMapping = Mapping(pUno_environment, pJava_environment); 150 getCppuType((::com::sun::star::uno::Reference< XAccessible > *) 0).getDescription((typelib_TypeDescription **) & g_pTypeDescription); 151 } 152 153 if ( pJava_environment ) 154 { 155 // release java environment 156 pJava_environment->release(pJava_environment); 157 pJava_environment = NULL; 158 } 159 160 if ( pUno_environment ) 161 { 162 // release uno environment 163 pUno_environment->release(pUno_environment); 164 pUno_environment = NULL; 165 } 166 } 167 } 168 169 catch ( RuntimeException e) 170 { 171 OSL_TRACE("RuntimeException caught while initializing the mapping"); 172 } 173 174 if ( (0 != g_jmRegisterTopWindow) && (0 != g_jmRevokeTopWindow) ) 175 { 176 ::Application::AddEventListener(g_aEventListenerLink); 177 } 178 return JNI_TRUE; 179 } 180 181 JNIEXPORT void JNICALL JNI_OnUnload(JavaVM *jvm, void *) 182 { 183 ::Application::RemoveEventListener(g_aEventListenerLink); 184 185 if ( NULL != g_jcWindowsAccessBridgeAdapter ) 186 { 187 JNIEnv * pJNIEnv; 188 if ( ! jvm->GetEnv((void **) &pJNIEnv, JNI_VERSION_1_2) ) 189 { 190 pJNIEnv->DeleteGlobalRef(g_jcWindowsAccessBridgeAdapter); 191 g_jcWindowsAccessBridgeAdapter = NULL; 192 } 193 } 194 195 if ( NULL != g_pTypeDescription ) 196 { 197 typelib_typedescription_release( reinterpret_cast< typelib_TypeDescription * > (g_pTypeDescription) ); 198 g_pTypeDescription = NULL; 199 } 200 201 g_unoMapping.clear(); 202 g_xUnoVirtualMachine.clear(); 203 } 204 205 HWND GetHWND(Window * pWindow) 206 { 207 const SystemEnvData * pEnvData = pWindow->GetSystemData(); 208 if (pEnvData != NULL) 209 { 210 return pEnvData->hWnd; 211 } 212 return (HWND) -1; 213 } 214 215 void handleWindowEvent(Window * pWindow, bool bShow) 216 { 217 if ( pWindow && pWindow->IsTopWindow() ) 218 { 219 ::com::sun::star::uno::Reference< XAccessible > xAccessible; 220 221 // Test for combo box - drop down floating windows first 222 Window * pParentWindow = pWindow->GetParent(); 223 224 if ( pParentWindow ) 225 { 226 try 227 { 228 // The parent window of a combo box floating window should have the role COMBO_BOX 229 ::com::sun::star::uno::Reference< XAccessible > xParentAccessible(pParentWindow->GetAccessible()); 230 if ( xParentAccessible.is() ) 231 { 232 ::com::sun::star::uno::Reference< XAccessibleContext > xParentAC(xParentAccessible->getAccessibleContext()); 233 if ( xParentAC.is() && (AccessibleRole::COMBO_BOX == xParentAC->getAccessibleRole()) ) 234 { 235 // O.k. - this is a combo box floating window corresponding to the child of role LIST of the parent. 236 // Let's not rely on a specific child order, just search for the child with the role LIST 237 sal_Int32 nCount = xParentAC->getAccessibleChildCount(); 238 for ( sal_Int32 n = 0; (n < nCount) && !xAccessible.is(); n++) 239 { 240 ::com::sun::star::uno::Reference< XAccessible > xChild = xParentAC->getAccessibleChild(n); 241 if ( xChild.is() ) 242 { 243 ::com::sun::star::uno::Reference< XAccessibleContext > xChildAC = xChild->getAccessibleContext(); 244 if ( xChildAC.is() && (AccessibleRole::LIST == xChildAC->getAccessibleRole()) ) 245 { 246 xAccessible = xChild; 247 } 248 } 249 } 250 } 251 } 252 } 253 catch (::com::sun::star::uno::RuntimeException e) 254 { 255 // Ignore show events that throw DisposedExceptions in getAccessibleContext(), 256 // but keep revoking these windows in hide(s). 257 if (bShow) 258 return; 259 } 260 } 261 262 // We have to rely on the fact that Window::GetAccessible()->getAccessibleContext() returns a valid XAccessibleContext 263 // also for other menus than menubar or toplevel popup window. Otherwise we had to traverse the hierarchy to find the 264 // context object to this menu floater. This makes the call to Window->IsMenuFloatingWindow() obsolete. 265 if ( ! xAccessible.is() ) 266 xAccessible = pWindow->GetAccessible(); 267 268 if ( xAccessible.is() && g_unoMapping.is() ) 269 { 270 jobject * joXAccessible = reinterpret_cast < jobject * > (g_unoMapping.mapInterface( 271 xAccessible.get(), g_pTypeDescription)); 272 273 if ( NULL != joXAccessible ) 274 { 275 jvmaccess::VirtualMachine::AttachGuard aGuard(g_xUnoVirtualMachine->getVirtualMachine()); 276 JNIEnv * pJNIEnv = aGuard.getEnvironment(); 277 278 if ( NULL != pJNIEnv ) 279 { 280 // g_jmRegisterTopWindow and g_jmRevokeTopWindow are ensured to be != 0 - otherwise 281 // the event listener would not have been attached. 282 pJNIEnv->CallStaticVoidMethod(g_jcWindowsAccessBridgeAdapter, 283 (bShow) ? g_jmRegisterTopWindow : g_jmRevokeTopWindow, 284 (jint) GetHWND(pWindow), joXAccessible ); 285 286 // Clear any exception that might have been occurred. 287 if (pJNIEnv->ExceptionCheck()) { 288 pJNIEnv->ExceptionClear(); 289 } 290 } 291 } 292 } 293 } 294 } 295 296 long VCLEventListenerLinkFunc(void *, void * pData) 297 { 298 ::VclSimpleEvent const * pEvent = (::VclSimpleEvent const *) pData; 299 300 switch (pEvent->GetId()) 301 { 302 case VCLEVENT_WINDOW_SHOW: 303 handleWindowEvent(((::VclWindowEvent const *) pEvent)->GetWindow(), true); 304 break; 305 case VCLEVENT_WINDOW_HIDE: 306 handleWindowEvent(((::VclWindowEvent const *) pEvent)->GetWindow(), false); 307 break; 308 } 309 310 return 0; 311 } 312