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ExportController.m
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ExportController.m
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//
// ExportController.m
// Geotagalog
//
// Created by Nathan Vander Wilt on 5/13/09.
// Copyright 2009 __MyCompanyName__. All rights reserved.
//
#import "ExportController.h"
#import "TLMainThreadPerformer.h"
@interface ExportController ()
@property (nonatomic, assign) BOOL shouldCancel;
- (void)backgroundExport;
@end
@interface NSMapTable (TLExtensions)
- (NSSet*)tl_allKeys;
@end
@implementation ExportController
@synthesize delegate;
@synthesize projectWindow;
@synthesize itemsWithMetadata;
@synthesize workflow;
@synthesize warnings;
@synthesize shouldCancel;
- (id)init {
self = [super init];
if (self) {
warnings = [NSMutableSet new];
}
return self;
}
- (void)dealloc {
NSAssert(!exportSheet, @"Export controller should not be deallocated with sheet still set");
[self setItemsWithMetadata:nil];
[warnings release];
[super dealloc];
}
- (void)loadSheet {
if (![self projectWindow]) return;
BOOL sheetLoaded = [NSBundle loadNibNamed:@"Export" owner:self];
if (!sheetLoaded) return;
[NSApp beginSheet:exportSheet
modalForWindow:[self projectWindow]
modalDelegate:self
didEndSelector:NULL
contextInfo:NULL];
/* NOTE: while the use of 0 is not documented, it does help the
app keep from getting too antsy. This is corroborated by
http://www.cocoabuilder.com/archive/message/cocoa/2006/2/3/155978 */
[NSApp cancelUserAttentionRequest:0];
}
- (void)unloadSheet {
if (!exportSheet) return;
[NSApp endSheet:exportSheet];
[exportSheet orderOut:self];
[exportSheet release];
exportSheet = nil;
}
- (void)export {
[self loadSheet];
[progressMeter setUsesThreadedAnimation:YES];
[progressMeter setIndeterminate:YES];
[progressMeter startAnimation:self];
[self performSelectorInBackground:@selector(backgroundExport) withObject:nil];
}
- (IBAction)cancel:(id)sender {
(void)sender;
[self setShouldCancel:YES];
[progressText setStringValue:@"Cancelling export."];
[cancelButton setEnabled:NO];
[progressMeter setIndeterminate:YES];
[progressMeter startAnimation:self];
}
#pragma mark Internal export implementation
- (void)notifyCancel {
if ([[self delegate] respondsToSelector:@selector(exportDidCancel:)]) {
[[[self delegate] tlMainThreadWait] exportDidCancel:self];
}
[[self tlMainThreadWait] unloadSheet];
}
- (void)notifyFail:(NSError*)err {
if ([[self delegate] respondsToSelector:@selector(exportDidFail:withError:)]) {
[[[self delegate] tlMainThreadWait] exportDidFail:self withError:err];
}
[[self tlMainThreadWait] unloadSheet];
}
- (void)notifyFinish {
if ([[self delegate] respondsToSelector:@selector(exportDidFinish:)]) {
[[[self delegate] tlMainThreadWait] exportDidFinish:self];
}
[[self tlMainThreadWait] unloadSheet];
}
- (void)backgroundExportMain {
NSProgressIndicator* progressMeterMT = [progressMeter tlMainThreadProxy];
NSTextField* progressTextMT = [progressText tlMainThreadProxy];
[progressTextMT setStringValue:@"Preparing to geotag."];
NSError* internalError;
BOOL prepared = [self prepareForItems:[[self itemsWithMetadata] tl_allKeys]
error:&internalError];
if ([self shouldCancel]) {
[self cancelExport];
[self notifyCancel];
return;
}
if (!prepared) {
[self notifyFail:internalError];
return;
}
[progressTextMT setStringValue:@"Exporting items."];
[progressMeterMT setIndeterminate:NO];
NSUInteger numTotalExport = [[self itemsWithMetadata] count];
NSUInteger geotaggedIdx = 0;
for (TLPhotoSourceItem* item in [self itemsWithMetadata]) {
NSDictionary* metadata = [[self itemsWithMetadata] objectForKey:item];
if ((id)metadata == [NSNull null]) {
metadata = nil;
}
BOOL exported = [self exportItem:item
withMetadata:metadata
error:&internalError];
if (!exported) {
[warnings addObject:internalError];
}
if ([self shouldCancel]) {
break;
}
++geotaggedIdx;
double exportPercent = geotaggedIdx / (double)numTotalExport;
[progressMeterMT setDoubleValue:exportPercent];
}
if ([self shouldCancel]) {
[self cancelExport];
[self notifyCancel];
return;
}
// prevent future cancellation, as we're about to finish export
[[cancelButton tlMainThreadWait] setEnabled:NO];
// user may have already cancelled, though
if ([self shouldCancel]) {
[self cancelExport];
[self notifyCancel];
return;
}
[progressTextMT setStringValue:@"Finishing export."];
[progressMeterMT setIndeterminate:YES];
[progressMeterMT startAnimation:self];
BOOL finished = [self finishExport:&internalError];
if (!finished) {
[self notifyFail:internalError];
return;
}
[self notifyFinish];
}
- (void)backgroundExport {
NSAutoreleasePool* threadPool = [NSAutoreleasePool new];
[self backgroundExportMain];
[threadPool drain];
}
#pragma mark Export implementation stubs
- (BOOL)prepareForItems:(NSSet*)items
error:(NSError**)err
{
(void)items;
(void)err;
return YES;
}
- (BOOL)exportItem:(TLPhotoSourceItem*)item
withMetadata:(NSDictionary*)metadata
error:(NSError**)err
{
(void)item;
(void)metadata;
(void)err;
return YES;
}
- (void)cancelExport {}
- (BOOL)finishExport:(NSError**)err {
(void)err;
return YES;
}
@end
@implementation NSMapTable (TLExtensions)
- (NSSet*)tl_allKeys {
return [NSSet setWithArray:NSAllMapTableKeys(self)];
}
@end