310 lines
12 KiB
Objective-C
310 lines
12 KiB
Objective-C
//
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// SpotlightWindowController.m
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// Cog
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//
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// Created by Matthew Grinshpun on 10/02/08.
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// Copyright 2008 Matthew Leon Grinshpun. All rights reserved.
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//
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#import "SpotlightWindowController.h"
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#import "PlaylistLoader.h"
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#import "SpotlightPlaylistEntry.h"
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#import "NSComparisonPredicate+CogPredicate.h"
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#import "NSArray+CogSort.h"
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#import "NSString+CogSort.h"
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#import "NSNumber+CogSort.h"
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#import "SpotlightTransformers.h"
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// Minimum length of a search string (searching for very small strings gets ugly)
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#define MINIMUM_SEARCH_STRING_LENGTH 3
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// Store a class predicate for searching for music
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static NSPredicate * musicOnlyPredicate = nil;
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@implementation SpotlightWindowController
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+ (void)initialize
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{
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musicOnlyPredicate = [[NSPredicate predicateWithFormat:
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@"kMDItemContentTypeTree==\'public.audio\'"] retain];
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// Register value transformers
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NSValueTransformer *pausingQueryTransformer = [[[PausingQueryTransformer alloc]init]autorelease];
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[NSValueTransformer setValueTransformer:pausingQueryTransformer forName:@"PausingQueryTransformer"];
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NSValueTransformer *authorToArtistTransformer = [[[AuthorToArtistTransformer alloc]init]autorelease];
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[NSValueTransformer setValueTransformer:authorToArtistTransformer forName:@"AuthorToArtistTransformer"];
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NSValueTransformer *pathToURLTransformer = [[[PathToURLTransformer alloc]init]autorelease];
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[NSValueTransformer setValueTransformer:pathToURLTransformer forName:@"PathToURLTransformers"];
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NSValueTransformer *stringToSearchScopeTransformer = [[[StringToSearchScopeTransformer alloc]init]autorelease];
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[NSValueTransformer setValueTransformer:stringToSearchScopeTransformer forName:@"StringToSearchScopeTransformer"];
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}
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- (void)registerDefaults
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{
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// Set the home directory as the default search directory
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NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
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NSString * homeDir = @"~";
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homeDir = [homeDir stringByExpandingTildeInPath];
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homeDir = [[NSURL fileURLWithPath:homeDir isDirectory:YES] absoluteString];
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NSDictionary *searchDefault =
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[NSDictionary dictionaryWithObject:homeDir
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forKey:@"spotlightSearchPath"];
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[defaults registerDefaults:searchDefault];
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}
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- (id)init
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{
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if (self = [super initWithWindowNibName:@"SpotlightPanel"]) {
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self.query = [[[NSMetadataQuery alloc]init]autorelease];
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[self.query setDelegate:self];
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self.query.sortDescriptors = [NSArray arrayWithObjects:
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[[[NSSortDescriptor alloc]initWithKey:@"kMDItemAuthors"
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ascending:YES
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selector:@selector(compareFirstString:)] autorelease],
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[[[NSSortDescriptor alloc]initWithKey:@"kMDItemAlbum"
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ascending:YES
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selector:@selector(caseInsensitiveCompare:)] autorelease],
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[[[NSSortDescriptor alloc]initWithKey:@"kMDItemAudioTrackNumber"
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ascending:YES
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selector:@selector(compareTrackNumbers:)] autorelease],
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nil];
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// hook my query transformer up to me
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[PausingQueryTransformer setSearchController:self];
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[self registerDefaults];
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// We want to bind the query's search scope to the user default that is
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// set from the NSPathControl.
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NSDictionary *bindOptions =
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[NSDictionary dictionaryWithObject:@"StringToSearchScopeTransformer"
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forKey:NSValueTransformerNameBindingOption];
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[self.query bind:@"searchScopes"
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toObject:[NSUserDefaultsController sharedUserDefaultsController]
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withKeyPath:@"values.spotlightSearchPath"
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options:bindOptions];
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}
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return self;
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}
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- (void)awakeFromNib
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{
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}
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- (IBAction)toggleWindow:(id)sender
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{
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if ([[self window] isVisible])
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[[self window] orderOut:self];
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else
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[self showWindow:self];
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}
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- (void)performSearch
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{
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NSPredicate *searchPredicate;
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// Process the search string into a compound predicate. If Nil is returned do nothing
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if(searchPredicate = [self processSearchString])
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{
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// spotlightPredicate, which is what will finally be used for the spotlight search
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// is the union of the (potentially) compound searchPredicate and the static
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// musicOnlyPredicate
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NSPredicate *spotlightPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:
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[NSArray arrayWithObjects: musicOnlyPredicate,
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searchPredicate,
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nil]];
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// Only preform a new search if the predicate has changed or there is a new path
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if(![self.query.predicate isEqual:spotlightPredicate]
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|| ![self.query.searchScopes isEqualToArray:
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[NSArray arrayWithObjects:pathControl.URL, nil]])
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{
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if([self.query isStarted])
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[self.query stopQuery];
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self.query.predicate = spotlightPredicate;
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// Set scope to contents of pathControl
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self.query.searchScopes = [NSArray arrayWithObjects:pathControl.URL, nil];
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[self.query startQuery];
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NSLog(@"Started query: %@", [self.query.predicate description]);
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}
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}
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}
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- (NSPredicate *)processSearchString
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{
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NSMutableArray *subpredicates = [NSMutableArray arrayWithCapacity:10];
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NSScanner *scanner = [NSScanner scannerWithString:self.searchString];
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BOOL exactString;
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NSString * scannedString;
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NSMutableString * parsingString;
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while (![scanner isAtEnd])
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{
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exactString = NO;
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if ([scanner scanUpToString:@" " intoString:&scannedString])
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{
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if ([scannedString length] < MINIMUM_SEARCH_STRING_LENGTH)
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continue;
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// We use NSMutableString because this string will get abused a bit
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// It potentially could be reading the entire search string
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parsingString = [NSMutableString stringWithCapacity: [self.searchString length]];
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[parsingString setString: scannedString];
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if ([parsingString characterAtIndex:0] == '%')
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{
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if ([parsingString length] < (MINIMUM_SEARCH_STRING_LENGTH + 2))
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continue;
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if ([parsingString characterAtIndex:2] == '\"')
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{
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exactString = YES;
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// If the string does not end in a quotation mark and we're not at the end,
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// scan until we find one.
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// Allows strings within quotation marks to include spaces
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if ([parsingString characterAtIndex:([parsingString length] - 1)] != '\"' &&
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![scanner isAtEnd])
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{
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NSString *restOfString;
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[scanner scanUpToString:@"\"" intoString:&restOfString];
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[parsingString appendFormat:@" %@", restOfString];
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}
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else if ([parsingString characterAtIndex:([parsingString length] - 1)] == '\"')
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{
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// pick off the quotation mark at the end
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[parsingString deleteCharactersInRange:
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NSMakeRange([parsingString length] - 1, 1)];
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}
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// eliminate beginning quotation mark
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[parsingString deleteCharactersInRange: NSMakeRange(2, 1)];
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}
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// Search for artist
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if([parsingString characterAtIndex:1] == 'a')
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{
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[subpredicates addObject:
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[NSComparisonPredicate predicateForMdKey:@"kMDItemAuthors"
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withString:[parsingString substringFromIndex:2]
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exactString:exactString]];
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}
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// Search for album
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if([parsingString characterAtIndex:1] == 'l')
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{
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[subpredicates addObject:
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[NSComparisonPredicate predicateForMdKey:@"kMDItemAlbum"
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withString:[parsingString substringFromIndex:2]
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exactString:exactString]];
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}
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// Search for title
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if([parsingString characterAtIndex:1] == 't')
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{
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[subpredicates addObject:
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[NSComparisonPredicate predicateForMdKey:@"kMDItemTitle"
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withString:[parsingString substringFromIndex:2]
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exactString:exactString]];
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}
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// Search for genre
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if([parsingString characterAtIndex:1] == 'g')
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{
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[subpredicates addObject:
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[NSComparisonPredicate predicateForMdKey:@"kMDItemMusicalGenre"
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withString:[parsingString substringFromIndex:2]
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exactString:exactString]];
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}
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// Search for comment
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if([parsingString characterAtIndex:1] == 'c')
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{
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[subpredicates addObject:
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[NSComparisonPredicate predicateForMdKey:@"kMDItemComment"
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withString:[parsingString substringFromIndex:2]
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exactString:exactString]];
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}
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}
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else
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{
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NSString * wildcardString = [NSString stringWithFormat:@"*%@*", parsingString];
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NSPredicate * pred = [NSPredicate predicateWithFormat:@"(kMDItemTitle LIKE[cd] %@) OR (kMDItemAlbum LIKE[cd] %@) OR (kMDItemAuthors LIKE[cd] %@)",
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wildcardString, wildcardString, wildcardString];
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[subpredicates addObject: pred];
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}
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}
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}
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if ([subpredicates count] == 0)
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return nil;
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else if ([subpredicates count] == 1)
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return [subpredicates objectAtIndex: 0];
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// Create a compound predicate from subPredicates
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return [NSCompoundPredicate andPredicateWithSubpredicates: subpredicates];
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}
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- (void)searchForArtist:(NSString *)artist
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{
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[self showWindow:self];
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self.searchString = [NSString stringWithFormat:@"%%a\"%@\"", artist];
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}
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- (void)searchForAlbum:(NSString *)album
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{
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[self showWindow:self];
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self.searchString = [NSString stringWithFormat:@"%%l\"%@\"", album];
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}
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- (void)dealloc
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{
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self.query = nil;
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self.searchString = nil;
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[super dealloc];
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}
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- (IBAction)addToPlaylist:(id)sender
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{
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NSArray *tracks;
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[self.query disableUpdates];
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tracks = playlistController.selectedObjects;
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if ([tracks count] == 0)
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tracks = playlistController.arrangedObjects;
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[playlistLoader willInsertURLs:[tracks valueForKey:@"URL"] origin:URLOriginExternal];
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[playlistLoader didInsertURLs:[playlistLoader addURLs:[tracks valueForKey:@"URL"] sort:NO] origin:URLOriginExternal];
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[self.query enableUpdates];
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}
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#pragma mark NSMetadataQuery delegate methods
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// replace the NSMetadataItem with a PlaylistEntry
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- (id)metadataQuery:(NSMetadataQuery*)query
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replacementObjectForResultObject:(NSMetadataItem*)result
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{
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return [SpotlightPlaylistEntry playlistEntryWithMetadataItem: result];
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}
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#pragma mark Getters and setters
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@synthesize query;
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@synthesize searchString;
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- (void)setSearchString:(NSString *)aString
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{
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// Make sure the string is changed
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if (![searchString isEqualToString:aString])
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{
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searchString = [aString copy];
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[self performSearch];
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}
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}
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@end
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