/* * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 2011 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <IOKit/system.h> #include <IOKit/hidsystem/IOHIDShared.h> #include "IOFixedPoint64.h" //=========================================================================== /* IOHIDSystemCursorHelper tracks 4 things. * The location of the cursor on the desktop. (location) * The change in location since the previous cursor update. (locationDelta) * The change in location that is currently being posted. (locationDeltaPosting) * The accumulated change since the last posting. (locationDeltaAccumulated) It also calculates one more. * The location of the cursor on the screen. (screenLocation) */ class IOHIDSystemCursorHelper { public: // the creator/destructor cannot be relied upon. use init/finalize instead. boolean_t init(); void finalize() { } IOFixedPoint64& desktopLocation() { return location; } IOFixedPoint64& desktopLocationDelta() { return locationDelta; } IOFixedPoint64& desktopLocationPosting() { return locationDeltaPosting; } void applyPostingDelta(); void startPosting(); IOFixedPoint64& desktopLocationAccumulated() { return locationDeltaAccumulated; } void incrementEventCount() { eventCount++; } SInt32 getEventCount() { return eventCount; } SInt32 getEventCountPosting() { return eventCountPosting; } void clearEventCounts() { eventCount = eventCountPosting = 0; } IOFixed64& expectedCount() { return expectedCountValue; } IOFixedPoint64 getScreenLocation() { return screenLocation; } void updateScreenLocation(IOGBounds *desktop, IOGBounds *screen); void logPosition(const char *name, uint64_t ts); void klogPosition(const char *name, uint64_t ts); void setOverdueTime(UInt64 time) { overdueTime = time; } bool isPosting(UInt64 time = 0); private: // all locations in desktop coordinates unless noted otherwise IOFixedPoint64 location; // aka pointerLoc IOFixedPoint64 locationDelta; // aka pointerDelta IOFixedPoint64 locationDeltaPosting; // aka postDeltaX/Y IOFixedPoint64 locationDeltaAccumulated; // aka accumDX/Y IOFixedPoint64 screenLocation; IOFixed64 expectedCountValue; SInt32 eventCount; SInt32 eventCountPosting; UInt64 overdueTime; }; //===========================================================================