mirror of
https://github.com/mauiaaron/apple2.git
synced 2024-09-08 10:54:35 +00:00
223 lines
6.7 KiB
Objective-C
223 lines
6.7 KiB
Objective-C
/*
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* Copyright (c) 2007 Dave Dribin, Lucas Newman
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#import "DDHidKeyboardBarcodeScanner.h"
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#import "DDHidElement.h"
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#import "DDHidUsage.h"
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#import "DDHidQueue.h"
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#import "DDHidEvent.h"
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#include <IOKit/hid/IOHIDUsageTables.h>
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@interface DDHidKeyboardBarcodeScanner (DDHidKeyboardBarcodeDelegate)
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- (void) ddhidKeyboardBarcodeScanner: (DDHidKeyboardBarcodeScanner *) keyboardBarcodeScanner
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gotBarcode: (NSString *) barcode;
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@end
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@interface DDHidKeyboardBarcodeScanner (Private)
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- (void) initKeyboardElements: (NSArray *) elements;
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- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
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- (void) processBarcodeDigit: (unsigned) usageId;
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- (void) clearAccumulatedInput;
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- (void) invalidateBarcodeInputTimer;
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@end
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@implementation DDHidKeyboardBarcodeScanner
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+ (NSArray *) allPossibleKeyboardBarcodeScanners;
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{
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return [DDHidDevice allDevicesMatchingUsagePage: kHIDPage_GenericDesktop
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usageId: kHIDUsage_GD_Keyboard
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withClass: self
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skipZeroLocations: YES];
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}
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- (id) initWithDevice: (io_object_t) device error: (NSError **) error_;
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{
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self = [super initWithDevice: device error: error_];
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if (self == nil)
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return nil;
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mKeyElements = [[NSMutableArray alloc] init];
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mAccumulatedDigits = [[NSMutableString alloc] init];
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mBarcodeInputTimer = nil;
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if ([[self productName] rangeOfString:@"Apple"].location != NSNotFound || [[self productName] rangeOfString:@"Internal"].location != NSNotFound)
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mIsLikelyKeyboardBarcodeScanner = NO;
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else
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mIsLikelyKeyboardBarcodeScanner = YES; // if we see invalid barcodes, we can change our mind
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[self initKeyboardElements: [self elements]];
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return self;
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}
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//===========================================================
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// dealloc
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//===========================================================
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- (void) dealloc
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{
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[self invalidateBarcodeInputTimer];
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[mKeyElements release];
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[mAccumulatedDigits release];
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mKeyElements = nil;
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mAccumulatedDigits = nil;
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[super dealloc];
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}
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#pragma mark -
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#pragma mark Keyboard Elements
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- (NSArray *) keyElements;
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{
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return mKeyElements;
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}
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- (NSUInteger) numberOfKeys;
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{
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return [mKeyElements count];
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}
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- (void) addElementsToQueue: (DDHidQueue *) queue;
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{
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[queue addElements: mKeyElements];
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}
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#pragma mark -
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#pragma mark Asynchronous Notification
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- (void) setDelegate: (id) delegate;
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{
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mDelegate = delegate;
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}
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- (void) addElementsToDefaultQueue;
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{
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[self addElementsToQueue: mDefaultQueue];
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}
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#pragma mark -
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#pragma mark Properties
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- (BOOL) isLikelyKeyboardBarcodeScanner;
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{
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return mIsLikelyKeyboardBarcodeScanner;
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}
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@end
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@implementation DDHidKeyboardBarcodeScanner (DDHidKeyboardDelegate)
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- (void) ddhidKeyboardBarcodeScanner: (DDHidKeyboardBarcodeScanner *) keyboardBarcodeScanner
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gotBarcode: (NSString *) barcode;
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{
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if ([mDelegate respondsToSelector: _cmd])
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[mDelegate ddhidKeyboardBarcodeScanner: keyboardBarcodeScanner gotBarcode: barcode];
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}
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@end
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@implementation DDHidKeyboardBarcodeScanner (Private)
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- (void) initKeyboardElements: (NSArray *) elements;
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{
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NSEnumerator * e = [elements objectEnumerator];
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DDHidElement * element;
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while ((element = [e nextObject]))
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{
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unsigned usagePage = [[element usage] usagePage];
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unsigned usageId = [[element usage] usageId];
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if (usagePage == kHIDPage_KeyboardOrKeypad)
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{
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if ((usageId >= kHIDUsage_KeyboardA) && (usageId <= kHIDUsage_Keyboard0))
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{
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[mKeyElements addObject: element];
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}
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}
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NSArray * subElements = [element elements];
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if (subElements != nil)
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[self initKeyboardElements: subElements];
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}
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}
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- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
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{
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DDHidEvent * event;
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while ((event = [hidQueue nextEvent]))
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{
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DDHidElement * element = [self elementForCookie: [event elementCookie]];
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unsigned usageId = [[element usage] usageId];
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SInt32 value = [event value];
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if (value == 1) // key down
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[self processBarcodeDigit: usageId];
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}
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}
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#define UPC_A_BARCODE_LENGTH (12)
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#define BARCODE_INPUT_TIMEOUT (0.5)
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- (void) processBarcodeDigit: (unsigned) usageId;
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{
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if (usageId <= kHIDUsage_KeyboardZ || usageId >= kHIDUsage_KeyboardCapsLock) { // an alphabetic key was pressed => probably not a barcode scanner
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[self willChangeValueForKey:@"isLikelyKeyboardBarcodeScanner"];
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mIsLikelyKeyboardBarcodeScanner = NO;
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[self didChangeValueForKey:@"isLikelyKeyboardBarcodeScanner"];
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[self clearAccumulatedInput];
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return;
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}
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if (!mBarcodeInputTimer) // schedule a timer to make sure we get the rest of the digits in a timely manner
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mBarcodeInputTimer = [[NSTimer scheduledTimerWithTimeInterval:BARCODE_INPUT_TIMEOUT target:self selector:@selector(fireBarcodeInputTimeout:) userInfo:nil repeats:NO] retain];
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[mAccumulatedDigits appendString:[NSString stringWithFormat:@"%d", (usageId + 1) % 10]];
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}
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- (void) fireBarcodeInputTimeout: (NSTimer *) timer;
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{
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if ([mAccumulatedDigits length] >= UPC_A_BARCODE_LENGTH)
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[self ddhidKeyboardBarcodeScanner: self gotBarcode: [[mAccumulatedDigits copy] autorelease]];
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[self clearAccumulatedInput];
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}
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- (void) clearAccumulatedInput;
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{
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[mAccumulatedDigits deleteCharactersInRange:NSMakeRange(0, [mAccumulatedDigits length])];
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[self invalidateBarcodeInputTimer];
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}
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- (void) invalidateBarcodeInputTimer;
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{
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[mBarcodeInputTimer invalidate];
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[mBarcodeInputTimer release];
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mBarcodeInputTimer = nil;
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}
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@end
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