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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxUserExperience-date.html">User Experience</a> > <A HREF="javascript:location.replace('index.html');">SpotlightFortunes</A> >
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<td><h1><div id="pagehead">SpotlightFortunes</div></h1></td>
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<h2>/Fortunes/FortunesAppDelegate.m</h2>
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<p><strong><a href="SpotlightFortunes.zip">Download Sample</a></strong> (“SpotlightFortunes.zip”, 121.4K)<BR>
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<pre class="sourcecodebox">/*
File: FortunesAppDelegate.m
Abstract: Fortunes example application delegate
Version: 1.0
Disclaimer: IMPORTANT: This Apple software is supplied to you by
Apple Inc. ("Apple") in consideration of your agreement to the
following terms, and your use, installation, modification or
redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use,
install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc.
may be used to endorse or promote products derived from the Apple
Software without specific prior written permission from Apple. Except
as expressly stated in this notice, no other rights or licenses, express
or implied, are granted by Apple herein, including but not limited to
any patent rights that may be infringed by your derivative works or by
other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2008 Apple Inc. All Rights Reserved.
*/
#import "FortunesAppDelegate.h"
#import <CommonCrypto/CommonDigest.h>
@interface NSString (MD5)
- (NSString *)MD5String;
@end
@implementation FortunesAppDelegate
/*
Allocate and initialize an NSMetadataQuery, and set its sort descriptors,
but don't start it executing yet. Let the application finish launching
before we start Spotlight doing work that will compete for I/O cycles.
*/
- (id)init;
{
if ((self = [super init]) != nil) {
self.query = [[[NSMetadataQuery alloc] init] autorelease];
// Prepare the query
[self.query setSortDescriptors:
[NSArray arrayWithObjects:
[[[NSSortDescriptor alloc] initWithKey:(id)kMDItemTimestamp
ascending:NO] autorelease],
[[[NSSortDescriptor alloc] initWithKey:(id)kMDItemDisplayName
ascending:NO] autorelease],
[[[NSSortDescriptor alloc] initWithKey:@"com_example_fortuneID"
ascending:NO] autorelease],
nil]];
}
return self;
}
- (void)dealloc;
{
[query release];
[searchString release];
[libraryFolder release];
[super dealloc];
}
/*
Reset the query predicate and then start query execution. If the user has
provided a search string, use it to build a compound predicate that will
perform a word prefix match. (This is a simplified version of what the
Spotlight menu does.)
*/
- (void)resetQueryPredicate;
{
NSPredicate * predicate = [NSPredicate predicateWithFormat:
@"kMDItemContentType == 'com.example.fortune-cookie'"];
if (self.searchString != nil) {
NSPredicate * subPredicate = [NSPredicate predicateWithFormat:
@"kMDItemTextContent like[cd] %@",
[self.searchString stringByAppendingString:@"*"]];
predicate = [NSCompoundPredicate andPredicateWithSubpredicates:
[NSArray arrayWithObjects:predicate, subPredicate, nil]];
}
[self.query setPredicate:predicate];
[self.query startQuery];
}
/*
Call -resetQueryPredicate whenever the user provides a new search string.
*/
- (void)setSearchString:(NSString *)value;
{
if (![searchString isEqualToString:value]) {
[searchString release];
searchString = [value copy];
[self resetQueryPredicate];
}
}
#pragma mark Support code
- (void)addToFortunes:(NSPasteboard *)pasteboard
userData:(NSString *)userData
error:(NSString **)error;
{
NSString * text = [pasteboard stringForType:NSStringPboardType];
if (text != nil) {
NSString * fortuneID = [text MD5String];
NSString * fortuneFile = [fortuneID stringByAppendingPathExtension:@"fortune"];
NSString * fortunePath = [self.libraryFolder stringByAppendingPathComponent:fortuneFile];
NSDictionary * plist = [NSDictionary dictionaryWithObjectsAndKeys:
[NSDate date], @"date",
fortuneID, @"fortuneID",
text, @"text",
nil];
NSData * data = [NSPropertyListSerialization dataFromPropertyList:plist
format:NSPropertyListXMLFormat_v1_0
errorDescription:NULL];
NSError * error = nil;
if (![data writeToFile:fortunePath
options:0
error:&error]) {
[NSApp presentError:error];
return;
}
NSLog(@"Added: %@", fortunePath);
}
}
- (void)insertFortune:(NSPasteboard *)pasteboard
userData:(NSString *)userData
error:(NSString **)error;
{
[pasteboard declareTypes:[NSArray arrayWithObject:NSStringPboardType]
owner:nil];
[pasteboard setString:@"No matter where you go, there you are..."
forType:NSStringPboardType];
}
- (NSDragOperation)tableView:(NSTableView *)view
validateDrop:(id <NSDraggingInfo>)info
proposedRow:(NSInteger)row
proposedDropOperation:(NSTableViewDropOperation)operation;
{
[tableView setDropRow:0
dropOperation:NSTableViewDropAbove];
return NSDragOperationCopy;
}
- (BOOL)tableView:(NSTableView *)view
acceptDrop:(id <NSDraggingInfo>)info
row:(NSInteger)row
dropOperation:(NSTableViewDropOperation)operation;
{
NSPasteboard * pasteboard = [info draggingPasteboard];
[self addToFortunes:pasteboard
userData:nil
error:NULL];
return YES;
}
- (NSString *)libraryFolder;
{
if (libraryFolder == nil) {
NSFileManager * fileManager = [NSFileManager defaultManager];
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString * basePath = (([paths count] > 0)
? [paths objectAtIndex:0]
: NSTemporaryDirectory());
self.libraryFolder = [basePath stringByAppendingPathComponent:@"Fortunes"];
if (![fileManager fileExistsAtPath:libraryFolder
isDirectory:NULL])
[fileManager createDirectoryAtPath:libraryFolder
attributes:nil];
}
return libraryFolder;
}
- (BOOL)application:(NSApplication *)application
openFile:(NSString *)fortunePath
{
NSLog(@"Opened: %@", fortunePath);
return YES;
}
/*
Start an initial Spotlight query to populate the table view when the
application is launched. Also register for drag-and-drop and as a Services
provider at this time.
*/
- (void)applicationDidFinishLaunching:(NSNotification *)notification;
{
[self resetQueryPredicate];
[self.tableView registerForDraggedTypes:[NSArray arrayWithObject:NSStringPboardType]];
[NSApp setServicesProvider:self];
NSUpdateDynamicServices();
}
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender;
{
return YES;
}
@synthesize query;
@synthesize tableView;
@synthesize searchString;
@synthesize libraryFolder;
@end
@implementation NSString (MD5)
/*
Return the hexadecimal string representation of the MD5 digest of the target
NSString. In this example, this is used to generate a statistically unique
ID for each fortune file.
*/
- (NSString *)MD5String;
{
CC_MD5_CTX digestCtx;
unsigned char digestBytes[CC_MD5_DIGEST_LENGTH];
char digestChars[CC_MD5_DIGEST_LENGTH * 2 + 1];
NSRange stringRange = NSMakeRange(0, [self length]);
unsigned char buffer[128];
NSUInteger usedBufferCount;
CC_MD5_Init(&digestCtx);
while ([self getBytes:buffer
maxLength:sizeof(buffer)
usedLength:&usedBufferCount
encoding:NSUnicodeStringEncoding
options:NSStringEncodingConversionAllowLossy
range:stringRange
remainingRange:&stringRange])
CC_MD5_Update(&digestCtx, buffer, usedBufferCount);
CC_MD5_Final(digestBytes, &digestCtx);
for (int i = 0;
i < CC_MD5_DIGEST_LENGTH;
i++)
sprintf(&digestChars[2 * i], "%02x", digestBytes[i]);
return [NSString stringWithUTF8String:digestChars];
}
@end
</pre>
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