new version of quick cursor

BBAppSessionLoginState.h

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+//
+//  NSLoginItems.h
+//
+//  Created by BrotherBard on 4/18/09.
+//  Copyright 2009 BrotherBard <nkinsinger at earthlink dot net>. All rights reserved.
+//
+//  Redistribution and use in source and binary forms, with or without modification,
+//  are permitted provided that the following conditions are met:
+//     * Redistributions of source code must retain the above copyright notice, this
+//       list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright notice,
+//       this list of conditions and the following disclaimer in the documentation 
+//       and/or other materials provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+//  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+//  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+//  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+//  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+//  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#import <Cocoa/Cocoa.h>
+
+
+// This singleton class handles the state of the running app in the users login items list (called
+// Session Login items by the LSSharedFileList API).
+
+// It sets up an observer of the Session Login List and keeps track if the user changes the state
+// in System Preferences or any other outside app. The property isAppInSessionLoginList will be updated 
+// when that happens.
+
+// isAppInSessionLoginList is only meant to represent the state, so do not set it yourself. 
+// Use the four instance methods for that. When changing the state, the state is re-read from LSSharedFileList 
+// so isAppInSessionLoginList should never not represent the current state.
+
+// Since there is no way to recover or re-apply a state change there are no returned errors. If it doesn't
+// work then isAppInSessionLoginList will not be updated.
+
+// NOTE: The LSSharedFileList API is only documented in the header file at:
+// file://localhost/Developer/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Headers/LSSharedFileList.h
+
+
+
+@interface BBAppSessionLoginState : NSObject
+{
+    LSSharedFileListRef _sessionLoginItemsList;
+    NSString           *_appPath;
+
+    BOOL                isAppInSessionLoginList;
+}
+// this is the latest state of whether the app is in the login list
+// observe it for KVC changes, setting it will have no effect, use the methods below
+@property (assign) BOOL isAppInSessionLoginList;
+
+
+// designated init/access of singleton
++ (id)sharedController;
+
+
+- (void)toggleAppSessionLoginListState;
+- (void)setAppSessionLoginListState:(BOOL)state;
+
+- (void)removeAppFromSessionLoginList;
+- (void)addAppToSessionLoginList;
+
+@end

BBAppSessionLoginState.m

@@ -0,0 +1,220 @@
+//
+//  NSLoginItems.m
+//
+//  Created by BrotherBard on 4/18/09.
+//  Copyright 2009 BrotherBard <nkinsinger at earthlink dot net>. All rights reserved.
+//
+//  Redistribution and use in source and binary forms, with or without modification,
+//  are permitted provided that the following conditions are met:
+//     * Redistributions of source code must retain the above copyright notice, this
+//       list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright notice,
+//       this list of conditions and the following disclaimer in the documentation 
+//       and/or other materials provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+//  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+//  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+//  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+//  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+//  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#import "BBAppSessionLoginState.h"
+
+// Private
+@interface BBAppSessionLoginState()
+
+- (LSSharedFileListItemRef)itemRefForApp;
+- (void)updateLoginItemState;
+
+@end
+
+
+
+@implementation BBAppSessionLoginState
+
+@synthesize isAppInSessionLoginList;
+
+
+- (void)setIsAppInSessionLoginList:(BOOL)isInList {
+	if (isAppInSessionLoginList != isInList) {
+		isAppInSessionLoginList = isInList;
+		if (isInList) {
+			[self addAppToSessionLoginList];
+		} else {
+			[self removeAppFromSessionLoginList];
+		}
+	}
+}
+
+// When something changes I get six calls to this method. The first two have the same seed and 
+// the last four do too. I'm not sure if it is something wierd on my computer, but I compare the
+// seed to the previous one to stop updating the login state too often.
+static void SharedFileListChanged(LSSharedFileListRef list, void *context)
+{
+    static UInt32 previousSeed = 0;
+
+    // there are other types of lists, so make sure we are just looking at the Session Login list
+    LSSharedFileListRef sessionLoginList = (LSSharedFileListRef)context;
+
+    if (list == sessionLoginList) {
+        UInt32 seed = LSSharedFileListGetSeedValue(list);
+        if (seed > previousSeed) {
+            [[BBAppSessionLoginState sharedController] updateLoginItemState];
+            previousSeed = seed;
+        }
+    }
+}
+
+
++ (id)sharedController
+{
+    static BBAppSessionLoginState *sharedController = nil;
+    if (!sharedController)
+        sharedController = [[self alloc] init];
+
+    return sharedController;
+}
+
+
+- (id)init
+{
+    self = [super init];
+    if(!self) return nil;
+
+    _sessionLoginItemsList = LSSharedFileListCreate(kCFAllocatorDefault,               // inAllocator
+													kLSSharedFileListSessionLoginItems, // inListType
+													NULL);                              // listOptions
+    if(!_sessionLoginItemsList) {
+        [self release];
+        return nil;
+    } 
+
+    LSSharedFileListAddObserver(_sessionLoginItemsList,                 // inList
+                                [[NSRunLoop mainRunLoop] getCFRunLoop], // inRunloop
+                                kCFRunLoopDefaultMode,                  // inRunloopMode
+                                SharedFileListChanged,                  // callback
+                                _sessionLoginItemsList);                // context
+
+    _appPath = [[NSBundle mainBundle] bundlePath];
+    [self updateLoginItemState];
+
+    return self;
+}
+
+
+- (void)dealloc
+{
+    if (_sessionLoginItemsList) {
+        LSSharedFileListRemoveObserver(_sessionLoginItemsList,                 // inList
+                                       [[NSRunLoop mainRunLoop] getCFRunLoop], // inRunloop
+                                       kCFRunLoopDefaultMode,                  // inRunloopMode
+                                       SharedFileListChanged,                  // callback
+                                       _sessionLoginItemsList);                // context
+
+        CFRelease(_sessionLoginItemsList);
+    }
+
+    [super dealloc];
+}
+
+
+- (LSSharedFileListItemRef)itemRefForApp
+{
+    UInt32 seed;
+    NSArray *items = (NSArray *)LSSharedFileListCopySnapshot(_sessionLoginItemsList, &seed);
+
+    for (id item in items) {
+        LSSharedFileListItemRef itemRef = (LSSharedFileListItemRef)item;
+
+        NSURL *theURL;
+        LSSharedFileListItemResolve(itemRef,                            // inItem
+                                    kLSSharedFileListNoUserInteraction, // inFlags
+                                    (CFURLRef*)&theURL,                 // outURL
+                                    NULL);                              // outFSRef
+        [theURL autorelease];
+
+        if ([_appPath isEqualToString:[theURL path]])
+            return itemRef;
+    }
+
+    return NULL;
+}
+
+
+- (void)updateLoginItemState
+{
+    BOOL currentState = [self itemRefForApp] ? YES : NO;
+    if (self.isAppInSessionLoginList != currentState)
+    	isAppInSessionLoginList = currentState;
+}
+
+
+- (void)toggleAppSessionLoginListState
+{
+    if (isAppInSessionLoginList)
+        [self removeAppFromSessionLoginList];
+    else
+        [self addAppToSessionLoginList];
+}
+
+
+- (void)setAppSessionLoginListState:(BOOL)state
+{
+    if (state)
+        [self addAppToSessionLoginList];
+    else
+        [self removeAppFromSessionLoginList];
+}
+
+
+- (void)removeAppFromSessionLoginList
+{
+    LSSharedFileListItemRef itemRef = [self itemRefForApp];
+
+    if (itemRef) {
+        OSStatus error = LSSharedFileListItemRemove(_sessionLoginItemsList, itemRef);
+        if (error != noErr)
+            NSLog(@"Failed to remove App from Session Login Items");
+    }
+
+    [self updateLoginItemState];
+}
+
+
+- (void)addAppToSessionLoginList
+{
+    LSSharedFileListItemRef itemRef = [self itemRefForApp];
+
+    if (!itemRef) {
+        // I believe the default is to not Hide the app, but I'm not really sure because the 
+        // kLSSharedFileListItemHidden property is not read corretly by LSSharedFileListItemCopyProperty.
+        // I'm just setting it here to have a default value.
+        NSDictionary* propertiesToSet = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]
+                                                                    forKey:(id)kLSSharedFileListItemHidden];
+        NSURL *url = [NSURL fileURLWithPath:_appPath];
+        NSLog(@"%@", url);
+
+        itemRef = LSSharedFileListInsertItemURL(_sessionLoginItemsList,           // inList
+                                                kLSSharedFileListItemLast,        // insertAfterThisItem
+                                                NULL,                             // inDisplayName - NULL = will use app name
+                                                NULL,                             // inIconRef     - NULL = will use app icon
+                                                (CFURLRef)url,                    // inURL
+                                                (CFDictionaryRef)propertiesToSet, // inPropertiesToSet
+                                                NULL);                            // inPropertiesToClear
+
+        if (itemRef)
+            CFRelease(itemRef);
+        else
+            NSLog(@"Failed to add App to Session Login Items");
+    }
+
+    [self updateLoginItemState];
+}
+
+@end