| /* |
| * Copyright (c) 2005, 2015, 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("\r\nin AccessBridgeATInstance::~AccessBridgeATInstance"); |
| |
| // if IPC memory mapped file view is valid, unmap it |
| if (memoryMappedView != (char *) 0) { |
| PrintDebugString(" 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(" 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("\r\nIn 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(" Failed to CreateFileMapping for %s, error: %X", memoryMappedFileName, errorCode); |
| return errorCode; |
| } else { |
| PrintDebugString(" CreateFileMapping worked - filename: %s", memoryMappedFileName); |
| } |
| |
| memoryMappedView = (char *) MapViewOfFile(memoryMappedFileMapHandle, |
| FILE_MAP_READ | FILE_MAP_WRITE, |
| 0, 0, 0); |
| if (memoryMappedView == NULL) { |
| errorCode = GetLastError(); |
| PrintDebugString(" Failed to MapViewOfFile for %s, error: %X", memoryMappedFileName, errorCode); |
| return errorCode; |
| } else { |
| PrintDebugString(" 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(" JavaVM failed to write to memory mapped file %s", |
| memoryMappedFileName); |
| return -1; |
| } else { |
| PrintDebugString(" 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 __stdcall |
| typedef unsigned int (__stdcall *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("AccessBridgeATInstance::sendJavaEventPackage() eventID = %X", eventID); |
| PrintDebugString("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("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; |
| } |