QuickLookDownloader/DownloadItem.m
/* |
Copyright (C) 2017 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
DownloadItem stores information of a downloaded item used by MyDocument. |
*/ |
#import "DownloadItem.h" |
#include <QuickLook/QuickLook.h> |
static NSString *originalURLKey = @"downloadURL"; |
static NSString *bookmarkKey = @"bookmark"; |
static NSOperationQueue *downloadIconQueue = nil; |
static NSDictionary *quickLookOptions = nil; |
#define ICON_SIZE 48.0 |
@implementation DownloadItem |
- (id)initWithOriginalURL:(NSURL *)downloadURL fileURL:(NSURL *)onDiskURL |
{ |
self = [super init]; |
if (self != nil) |
{ |
_originalURL = [downloadURL copy]; |
_resolvedFileURL = [onDiskURL copy]; |
} |
return self; |
} |
- (id)initWithSavedPropertyList:(id)propertyList |
{ |
self = [super init]; |
if (self != nil) |
{ |
if (![propertyList isKindOfClass:[NSDictionary class]]) |
{ |
return nil; |
} |
NSString *originalURLString = propertyList[originalURLKey]; |
if (!originalURLString || ![originalURLString isKindOfClass:[NSString class]]) |
{ |
return nil; |
} |
_originalURL = [[NSURL alloc] initWithString:originalURLString]; |
if (!self.originalURL) |
{ |
return nil; |
} |
NSData *bookmarkData = propertyList[bookmarkKey]; |
if (!bookmarkData || ![bookmarkData isKindOfClass:[NSData class]]) |
{ |
return nil; |
} |
// test if the file still exists |
_resolvedFileURL = [NSURL URLByResolvingBookmarkData:bookmarkData |
options:(NSURLBookmarkResolutionWithoutUI | NSURLBookmarkResolutionWithoutMounting) |
relativeToURL:nil bookmarkDataIsStale:NULL error:NULL]; |
if (!self.resolvedFileURL) |
{ |
return nil; |
} |
} |
return self; |
} |
- (NSImage *)iconImage |
{ |
if (_iconImage == nil) |
{ |
_iconImage = [[NSWorkspace sharedWorkspace] iconForFile:[self.resolvedFileURL path]]; |
[_iconImage setSize:NSMakeSize(ICON_SIZE, ICON_SIZE)]; |
if (!downloadIconQueue) |
{ |
downloadIconQueue = [[NSOperationQueue alloc] init]; |
[downloadIconQueue setMaxConcurrentOperationCount:2]; |
quickLookOptions = @{(id)kQLThumbnailOptionIconModeKey: (id)kCFBooleanTrue}; |
} |
[downloadIconQueue addOperationWithBlock:^{ |
CGImageRef quickLookIcon = QLThumbnailImageCreate(NULL, (__bridge CFURLRef)self.resolvedFileURL, CGSizeMake(ICON_SIZE, ICON_SIZE), (__bridge CFDictionaryRef)quickLookOptions); |
if (quickLookIcon != NULL) |
{ |
NSImage* betterIcon = [[NSImage alloc] initWithCGImage:quickLookIcon size:NSMakeSize(ICON_SIZE, ICON_SIZE)]; |
[self performSelectorOnMainThread:@selector(setIconImage:) withObject:betterIcon waitUntilDone:NO]; |
CFRelease(quickLookIcon); |
} |
}]; |
} |
return _iconImage; |
} |
- (NSString *)displayName |
{ |
return [[self.resolvedFileURL path] lastPathComponent]; |
} |
- (id)propertyListForSaving |
{ |
NSData *bookmarkData = [self.resolvedFileURL bookmarkDataWithOptions:NSURLBookmarkCreationMinimalBookmark includingResourceValuesForKeys:nil relativeToURL:nil error:NULL]; |
if (!bookmarkData) |
{ |
return nil; |
} |
return @{originalURLKey: [self.originalURL absoluteString], |
bookmarkKey: bookmarkData}; |
} |
- (NSString *)description |
{ |
return [NSString stringWithFormat:@"<%@ %@ (from %@)>", [self class], self.resolvedFileURL, self.originalURL]; |
} |
@end |
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