| /* | |
| * Copyright (c) 2005, 2024, 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. | |
| */ | |
| /* | |
| * A class to track key AT instance info from the JavaAccessBridge | |
| */ | |
| #include "AccessBridgeDebug.h" | |
| #include "AccessBridgeATInstance.h" | |
| #include "AccessBridgeMessages.h" | |
| #include <windows.h> | |
| #include <winbase.h> | |
| /** | |
| * AccessBridgeATInstance constructor | |
| */ | |
| AccessBridgeATInstance::AccessBridgeATInstance(HWND ourABWindow, HWND winABWindow, | |
| char *memoryFilename, | |
| AccessBridgeATInstance *next) { | |
| ourAccessBridgeWindow = ourABWindow; | |
| winAccessBridgeWindow = winABWindow; | |
| nextATInstance = next; | |
| javaEventMask = 0; | |
| accessibilityEventMask = 0; | |
| strncpy(memoryMappedFileName, memoryFilename, cMemoryMappedNameSize); | |
| } | |
| /** | |
| * AccessBridgeATInstance descructor | |
| */ | |
| AccessBridgeATInstance::~AccessBridgeATInstance() { | |
| PrintDebugString("[INFO]: in AccessBridgeATInstance::~AccessBridgeATInstance"); | |
| // if IPC memory mapped file view is valid, unmap it | |
| if (memoryMappedView != (char *) 0) { | |
| PrintDebugString("[INFO]: unmapping memoryMappedView; view = %p", memoryMappedView); | |
| UnmapViewOfFile(memoryMappedView); | |
| memoryMappedView = (char *) 0; | |
| } | |
| // if IPC memory mapped file handle map is open, close it | |
| if (memoryMappedFileMapHandle != (HANDLE) 0) { | |
| PrintDebugString("[INFO]: closing memoryMappedFileMapHandle; handle = %p", memoryMappedFileMapHandle); | |
| CloseHandle(memoryMappedFileMapHandle); | |
| memoryMappedFileMapHandle = (HANDLE) 0; | |
| } | |
| } | |
| /** | |
| * Sets up the memory-mapped file to do IPC messaging | |
| * 1 files is created: to handle requests for information | |
| * initiated from Windows AT. The package is placed into | |
| * the memory-mapped file (char *memoryMappedView), | |
| * and then a special SendMessage() is sent. When the | |
| * JavaDLL returns from SendMessage() processing, the | |
| * data will be in memoryMappedView. The SendMessage() | |
| * return value tells us if all is right with the world. | |
| * | |
| * The set-up proces involves creating the memory-mapped | |
| * file, and writing a special string to it so that the | |
| * WindowsDLL so it knows about it as well. | |
| */ | |
| LRESULT | |
| AccessBridgeATInstance::initiateIPC() { | |
| DWORD errorCode; | |
| PrintDebugString("[INFO]: In AccessBridgeATInstance::initiateIPC()"); | |
| // open Windows-initiated IPC filemap & map it to a ptr | |
| memoryMappedFileMapHandle = OpenFileMapping(FILE_MAP_READ | FILE_MAP_WRITE, | |
| FALSE, memoryMappedFileName); | |
| if (memoryMappedFileMapHandle == NULL) { | |
| errorCode = GetLastError(); | |
| PrintDebugString("[ERROR]: Failed to CreateFileMapping for %s, error: %X", memoryMappedFileName, errorCode); | |
| return errorCode; | |
| } else { | |
| PrintDebugString("[INFO]: CreateFileMapping worked - filename: %s", memoryMappedFileName); | |
| } | |
| memoryMappedView = (char *) MapViewOfFile(memoryMappedFileMapHandle, | |
| FILE_MAP_READ | FILE_MAP_WRITE, | |
| 0, 0, 0); | |
| if (memoryMappedView == NULL) { | |
| errorCode = GetLastError(); | |
| PrintDebugString("[ERROR]: Failed to MapViewOfFile for %s, error: %X", memoryMappedFileName, errorCode); | |
| return errorCode; | |
| } else { | |
| PrintDebugString("[INFO]: MapViewOfFile worked - view: %p", memoryMappedView); | |
| } | |
| // look for the JavaDLL's answer to see if it could read the file | |
| if (strcmp(memoryMappedView, AB_MEMORY_MAPPED_FILE_OK_QUERY) != 0) { | |
| PrintDebugString("[ERROR]: JavaVM failed to write to memory mapped file %s", | |
| memoryMappedFileName); | |
| return -1; | |
| } else { | |
| PrintDebugString("[INFO]: JavaVM successfully wrote to file!"); | |
| } | |
| // write some data to the memory mapped file for WindowsDLL to verify | |
| strcpy(memoryMappedView, AB_MEMORY_MAPPED_FILE_OK_ANSWER); | |
| return 0; | |
| } | |
| typedef struct EVENT_STRUCT | |
| { | |
| char *buffer; | |
| int bufsize; | |
| ABHWND64 winAccessBridgeWindow; | |
| ABHWND64 ourAccessBridgeWindow; | |
| }EVENT_STRUCT; | |
| #include <process.h> | |
| #define THREAD_PROC unsigned int | |
| typedef unsigned int (*THREAD_ROUTINE)(LPVOID lpThreadParameter); | |
| static HANDLE BeginThread(THREAD_ROUTINE thread_func,DWORD *id,DWORD param) | |
| { | |
| HANDLE ret; | |
| ret = (HANDLE) _beginthreadex(NULL,0,thread_func,(void *)param,0,(unsigned int *)id); | |
| if(ret == INVALID_HANDLE_VALUE) | |
| ret = NULL; | |
| return(ret); | |
| } | |
| DWORD JavaBridgeThreadId = 0; | |
| static THREAD_PROC JavaBridgeThread(LPVOID param1) | |
| { | |
| MSG msg; | |
| DWORD rc = 0; | |
| while (GetMessage(&msg, // message structure | |
| NULL, // handle of window receiving the message | |
| 0, // lowest message to examine | |
| 0)) // highest message to examine | |
| { | |
| if(msg.message == WM_USER) | |
| { | |
| EVENT_STRUCT *event_struct = (EVENT_STRUCT *)msg.wParam; | |
| COPYDATASTRUCT toCopy; | |
| toCopy.dwData = 0; // 32-bits we could use for something... | |
| toCopy.cbData = event_struct->bufsize; | |
| toCopy.lpData = event_struct->buffer; | |
| LRESULT ret = SendMessage((HWND)ABLongToHandle(event_struct->winAccessBridgeWindow), WM_COPYDATA, | |
| (WPARAM)event_struct->ourAccessBridgeWindow, (LPARAM) &toCopy); | |
| delete event_struct->buffer; | |
| delete event_struct; | |
| } | |
| if(msg.message == (WM_USER+1)) | |
| PostQuitMessage(0); | |
| } | |
| JavaBridgeThreadId = 0; | |
| return(0); | |
| } | |
| /* | |
| * Handles one event | |
| */ | |
| static void do_event(char *buffer, int bufsize,HWND ourAccessBridgeWindow,HWND winAccessBridgeWindow) | |
| { | |
| EVENT_STRUCT *event_struct = new EVENT_STRUCT; | |
| event_struct->bufsize = bufsize; | |
| event_struct->buffer = new char[bufsize]; | |
| memcpy(event_struct->buffer,buffer,bufsize); | |
| event_struct->ourAccessBridgeWindow = ABHandleToLong(ourAccessBridgeWindow); | |
| event_struct->winAccessBridgeWindow = ABHandleToLong(winAccessBridgeWindow); | |
| if(!JavaBridgeThreadId) | |
| { | |
| HANDLE JavaBridgeThreadHandle = BeginThread(JavaBridgeThread,&JavaBridgeThreadId,(DWORD)event_struct); | |
| CloseHandle(JavaBridgeThreadHandle); | |
| } | |
| PostThreadMessage(JavaBridgeThreadId,WM_USER,(WPARAM)event_struct,0); | |
| } | |
| /** | |
| * sendJavaEventPackage - uses SendMessage(WM_COPYDATA) to do | |
| * IPC messaging with the Java AccessBridge DLL | |
| * to propogate events to those ATs that want 'em | |
| * | |
| */ | |
| LRESULT | |
| AccessBridgeATInstance::sendJavaEventPackage(char *buffer, int bufsize, long eventID) { | |
| PrintDebugString("[INFO]: AccessBridgeATInstance::sendJavaEventPackage() eventID = %X", eventID); | |
| PrintDebugString("[INFO]: AccessBridgeATInstance::sendJavaEventPackage() (using PostMessage) eventID = %X", eventID); | |
| if (eventID & javaEventMask) { | |
| do_event(buffer,bufsize,ourAccessBridgeWindow,winAccessBridgeWindow); | |
| return(0); | |
| } else { | |
| return -1; | |
| } | |
| } | |
| /** | |
| * uses SendMessage(WM_COPYDATA) to do | |
| * IPC messaging with the Java AccessBridge DLL | |
| * to propogate events to those ATs that want 'em | |
| * | |
| */ | |
| LRESULT | |
| AccessBridgeATInstance::sendAccessibilityEventPackage(char *buffer, int bufsize, long eventID) { | |
| PrintDebugString("[INFO]: AccessBridgeATInstance::sendAccessibilityEventPackage() eventID = %X", eventID); | |
| if (eventID & accessibilityEventMask) { | |
| do_event(buffer,bufsize,ourAccessBridgeWindow,winAccessBridgeWindow); | |
| return(0); | |
| } else { | |
| return -1; | |
| } | |
| } | |
| /** | |
| * findABATInstanceFromATHWND - walk through linked list from | |
| * where we are. Return the | |
| * AccessBridgeATInstance | |
| * of the ABATInstance that | |
| * matches the passed in vmID; | |
| * no match: return 0 | |
| */ | |
| AccessBridgeATInstance * | |
| AccessBridgeATInstance::findABATInstanceFromATHWND(HWND window) { | |
| // no need to recurse really | |
| if (winAccessBridgeWindow == window) { | |
| return this; | |
| } else { | |
| AccessBridgeATInstance *current = nextATInstance; | |
| while (current != (AccessBridgeATInstance *) 0) { | |
| if (current->winAccessBridgeWindow == window) { | |
| return current; | |
| } | |
| current = current->nextATInstance; | |
| } | |
| } | |
| return (AccessBridgeATInstance *) 0; | |
| } |