1 files changed, 173 insertions, 0 deletions
diff --git a/lib/DDHidKeyboard.m b/lib/DDHidKeyboard.m
new file mode 100644
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--- /dev/null
+++ b/lib/DDHidKeyboard.m
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2007 Dave Dribin
+ * 
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#import "DDHidKeyboard.h"
+#import "DDHidElement.h"
+#import "DDHidUsage.h"
+#import "DDHidQueue.h"
+#import "DDHidEvent.h"
+#include <IOKit/hid/IOHIDUsageTables.h>
+
+@interface DDHidKeyboard (DDHidKeyboardDelegate)
+
+- (void) ddhidKeyboard: (DDHidKeyboard *) keyboard
+               keyDown: (unsigned) usageId;
+
+- (void) ddhidKeyboard: (DDHidKeyboard *) keyboard
+                 keyUp: (unsigned) usageId;
+
+@end
+
+@interface DDHidKeyboard (Private)
+
+- (void) initKeyboardElements: (NSArray *) elements;
+- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
+
+@end
+
+@implementation DDHidKeyboard
+
++ (NSArray *) allKeyboards;
+{
+    return
+        [DDHidDevice allDevicesMatchingUsagePage: kHIDPage_GenericDesktop
+                                         usageId: kHIDUsage_GD_Keyboard
+                                       withClass: self
+                               skipZeroLocations: YES];
+}
+
+- (id) initWithDevice: (io_object_t) device error: (NSError **) error_;
+{
+    self = [super initWithDevice: device error: error_];
+    if (self == nil)
+        return nil;
+    
+    mKeyElements = [[NSMutableArray alloc] init];
+    [self initKeyboardElements: [self elements]];
+    
+    return self;
+}
+
+//=========================================================== 
+// dealloc
+//=========================================================== 
+- (void) dealloc
+{
+    [mKeyElements release];
+    
+    mKeyElements = nil;
+    [super dealloc];
+}
+
+#pragma mark -
+#pragma mark Keyboards Elements
+
+- (NSArray *) keyElements;
+{
+    return mKeyElements;
+}
+
+- (unsigned) numberOfKeys;
+{
+    return [mKeyElements count];
+}
+
+- (void) addElementsToQueue: (DDHidQueue *) queue;
+{
+    [queue addElements: mKeyElements];
+}
+
+#pragma mark -
+#pragma mark Asynchronous Notification
+
+- (void) setDelegate: (id) delegate;
+{
+    mDelegate = delegate;
+}
+
+- (void) addElementsToDefaultQueue;
+{
+    [self addElementsToQueue: mDefaultQueue];
+}
+
+@end
+
+@implementation DDHidKeyboard (DDHidKeyboardDelegate)
+
+- (void) ddhidKeyboard: (DDHidKeyboard *) keyboard
+               keyDown: (unsigned) usageId;
+{
+    if ([mDelegate respondsToSelector: _cmd])
+        [mDelegate ddhidKeyboard: keyboard keyDown: usageId];
+}
+
+- (void) ddhidKeyboard: (DDHidKeyboard *) keyboard
+                 keyUp: (unsigned) usageId;
+{
+    if ([mDelegate respondsToSelector: _cmd])
+        [mDelegate ddhidKeyboard: keyboard keyUp: usageId];
+}
+
+@end
+
+@implementation DDHidKeyboard (Private)
+
+- (void) initKeyboardElements: (NSArray *) elements;
+{
+    NSEnumerator * e = [elements objectEnumerator];
+    DDHidElement * element;
+    while (element = [e nextObject])
+    {
+        unsigned usagePage = [[element usage] usagePage];
+        unsigned usageId = [[element usage] usageId];
+        if (usagePage == kHIDPage_KeyboardOrKeypad)
+        {
+            if ((usageId >= 0x04) && (usageId <= 0xA4) ||
+                (usageId >= 0xE0) && (usageId <= 0xE7))
+            {
+                [mKeyElements addObject: element];
+            }
+        }
+        NSArray * subElements = [element elements];
+        if (subElements != nil)
+            [self initKeyboardElements: subElements];
+    }
+}
+
+- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
+{
+    DDHidEvent * event;
+    while (event = [hidQueue nextEvent])
+    {
+        DDHidElement * element = [self elementForCookie: [event elementCookie]];
+        unsigned usageId = [[element usage] usageId];
+        SInt32 value = [event value];
+        if (value == 1)
+            [self ddhidKeyboard: self keyDown: usageId];
+        else
+            [self ddhidKeyboard: self keyUp: usageId];
+    }
+}
+
+@end