space-ios/iOSClient/Library/VFR Pdf Reader/Sources/ReaderViewController.m

//
//	ReaderViewController.m
//	Reader v2.8.6
//
//	Created by Julius Oklamcak on 2011-07-01.
//	Copyright © 2011-2015 Julius Oklamcak. All rights reserved.
//
//	Permission is hereby granted, free of charge, to any person obtaining a copy
//	of this software and associated documentation files (the "Software"), to deal
//	in the Software without restriction, including without limitation the rights to
//	use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
//	of the Software, and to permit persons to whom the Software is furnished to
//	do so, subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in all
//	copies or substantial portions of the Software.
//
//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
//	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
//	WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
//	CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#import "ReaderConstants.h"
#import "ReaderViewController.h"
#import "ThumbsViewController.h"
#import "ReaderMainToolbar.h"
#import "ReaderMainPagebar.h"
#import "ReaderContentView.h"
#import "ReaderThumbCache.h"
#import "ReaderThumbQueue.h"

#import <MessageUI/MessageUI.h>

@interface ReaderViewController () <UIScrollViewDelegate, UIGestureRecognizerDelegate, MFMailComposeViewControllerDelegate, UIDocumentInteractionControllerDelegate,
									ReaderMainToolbarDelegate, ReaderMainPagebarDelegate, ReaderContentViewDelegate, ThumbsViewControllerDelegate>
@end

@implementation ReaderViewController
{
	ReaderDocument *document;

	UIScrollView *theScrollView;

	ReaderMainToolbar *mainToolbar;

	ReaderMainPagebar *mainPagebar;

	NSMutableDictionary *contentViews;

	UIUserInterfaceIdiom userInterfaceIdiom;

	NSInteger currentPage, minimumPage, maximumPage;

	UIDocumentInteractionController *documentInteraction;

	UIPrintInteractionController *printInteraction;

	CGFloat scrollViewOutset;

	CGSize lastAppearSize;

	NSDate *lastHideTime;

	BOOL ignoreDidScroll;
}

#pragma mark - Constants

#define STATUS_HEIGHT 20.0f

#define TOOLBAR_HEIGHT 44.0f
#define PAGEBAR_HEIGHT 48.0f

#define SCROLLVIEW_OUTSET_SMALL 4.0f
#define SCROLLVIEW_OUTSET_LARGE 8.0f

#define TAP_AREA_SIZE 48.0f

#pragma mark - Properties

@synthesize delegate;

#pragma mark - ReaderViewController methods

- (void)updateContentSize:(UIScrollView *)scrollView
{
	CGFloat contentHeight = scrollView.bounds.size.height; // Height

	CGFloat contentWidth = (scrollView.bounds.size.width * maximumPage);

	scrollView.contentSize = CGSizeMake(contentWidth, contentHeight);
}

- (void)updateContentViews:(UIScrollView *)scrollView
{
	[self updateContentSize:scrollView]; // Update content size first

	[contentViews enumerateKeysAndObjectsUsingBlock: // Enumerate content views
		^(NSNumber *key, ReaderContentView *contentView, BOOL *stop)
		{
			NSInteger page = [key integerValue]; // Page number value

			CGRect viewRect = CGRectZero; viewRect.size = scrollView.bounds.size;

			viewRect.origin.x = (viewRect.size.width * (page - 1)); // Update X

			contentView.frame = CGRectInset(viewRect, scrollViewOutset, 0.0f);
		}
	];

	NSInteger page = currentPage; // Update scroll view offset to current page

	CGPoint contentOffset = CGPointMake((scrollView.bounds.size.width * (page - 1)), 0.0f);

	if (CGPointEqualToPoint(scrollView.contentOffset, contentOffset) == false) // Update
	{
		scrollView.contentOffset = contentOffset; // Update content offset
	}

	[mainToolbar setBookmarkState:[document.bookmarks containsIndex:page]];

	[mainPagebar updatePagebar]; // Update page bar
}

- (void)addContentView:(UIScrollView *)scrollView page:(NSInteger)page
{
	CGRect viewRect = CGRectZero; viewRect.size = scrollView.bounds.size;

	viewRect.origin.x = (viewRect.size.width * (page - 1)); viewRect = CGRectInset(viewRect, scrollViewOutset, 0.0f);

	NSURL *fileURL = document.fileURL; NSString *phrase = document.password; NSString *guid = document.guid; // Document properties

	ReaderContentView *contentView = [[ReaderContentView alloc] initWithFrame:viewRect fileURL:fileURL page:page password:phrase]; // ReaderContentView

	contentView.message = self; [contentViews setObject:contentView forKey:[NSNumber numberWithInteger:page]]; [scrollView addSubview:contentView];

	[contentView showPageThumb:fileURL page:page password:phrase guid:guid]; // Request page preview thumb
}

- (void)layoutContentViews:(UIScrollView *)scrollView
{
	CGFloat viewWidth = scrollView.bounds.size.width; // View width

	CGFloat contentOffsetX = scrollView.contentOffset.x; // Content offset X

	NSInteger pageB = ((contentOffsetX + viewWidth - 1.0f) / viewWidth); // Pages

	NSInteger pageA = (contentOffsetX / viewWidth); pageB += 2; // Add extra pages

	if (pageA < minimumPage) pageA = minimumPage; if (pageB > maximumPage) pageB = maximumPage;

	NSRange pageRange = NSMakeRange(pageA, (pageB - pageA + 1)); // Make page range (A to B)

	NSMutableIndexSet *pageSet = [NSMutableIndexSet indexSetWithIndexesInRange:pageRange];

	for (NSNumber *key in [contentViews allKeys]) // Enumerate content views
	{
		NSInteger page = [key integerValue]; // Page number value

		if ([pageSet containsIndex:page] == NO) // Remove content view
		{
			ReaderContentView *contentView = [contentViews objectForKey:key];

			[contentView removeFromSuperview]; [contentViews removeObjectForKey:key];
		}
		else // Visible content view - so remove it from page set
		{
			[pageSet removeIndex:page];
		}
	}

	NSInteger pages = pageSet.count;

	if (pages > 0) // We have pages to add
	{
		NSEnumerationOptions options = 0; // Default

		if (pages == 2) // Handle case of only two content views
		{
			if ((maximumPage > 2) && ([pageSet lastIndex] == maximumPage)) options = NSEnumerationReverse;
		}
		else if (pages == 3) // Handle three content views - show the middle one first
		{
			NSMutableIndexSet *workSet = [pageSet mutableCopy]; options = NSEnumerationReverse;

			[workSet removeIndex:[pageSet firstIndex]]; [workSet removeIndex:[pageSet lastIndex]];

			NSInteger page = [workSet firstIndex]; [pageSet removeIndex:page];

			[self addContentView:scrollView page:page];
		}

		[pageSet enumerateIndexesWithOptions:options usingBlock: // Enumerate page set
			^(NSUInteger page, BOOL *stop)
			{
				[self addContentView:scrollView page:page];
			}
		];
	}
}

- (void)handleScrollViewDidEnd:(UIScrollView *)scrollView
{
	CGFloat viewWidth = scrollView.bounds.size.width; // Scroll view width

	CGFloat contentOffsetX = scrollView.contentOffset.x; // Content offset X

	NSInteger page = (contentOffsetX / viewWidth); page++; // Page number

	if (page != currentPage) // Only if on different page
	{
		currentPage = page; document.pageNumber = [NSNumber numberWithInteger:page];

		[contentViews enumerateKeysAndObjectsUsingBlock: // Enumerate content views
			^(NSNumber *key, ReaderContentView *contentView, BOOL *stop)
			{
				if ([key integerValue] != page) [contentView zoomResetAnimated:NO];
			}
		];

		[mainToolbar setBookmarkState:[document.bookmarks containsIndex:page]];

		[mainPagebar updatePagebar]; // Update page bar
	}
}

- (void)showDocumentPage:(NSInteger)page
{
	if (page != currentPage) // Only if on different page
	{
		if ((page < minimumPage) || (page > maximumPage)) return;

		currentPage = page; document.pageNumber = [NSNumber numberWithInteger:page];

		CGPoint contentOffset = CGPointMake((theScrollView.bounds.size.width * (page - 1)), 0.0f);

		if (CGPointEqualToPoint(theScrollView.contentOffset, contentOffset) == true)
			[self layoutContentViews:theScrollView];
		else
			[theScrollView setContentOffset:contentOffset];

		[contentViews enumerateKeysAndObjectsUsingBlock: // Enumerate content views
			^(NSNumber *key, ReaderContentView *contentView, BOOL *stop)
			{
				if ([key integerValue] != page) [contentView zoomResetAnimated:NO];
			}
		];

		[mainToolbar setBookmarkState:[document.bookmarks containsIndex:page]];

		[mainPagebar updatePagebar]; // Update page bar
	}
}

- (void)showDocument
{
	[self updateContentSize:theScrollView]; // Update content size first

	[self showDocumentPage:[document.pageNumber integerValue]]; // Show page

	document.lastOpen = [NSDate date]; // Update document last opened date
}

- (void)closeDocument
{
	if (printInteraction != nil) [printInteraction dismissAnimated:NO];

	[document archiveDocumentProperties]; // Save any ReaderDocument changes

	[[ReaderThumbQueue sharedInstance] cancelOperationsWithGUID:document.guid];

	[[ReaderThumbCache sharedInstance] removeAllObjects]; // Empty the thumb cache

	if ([delegate respondsToSelector:@selector(dismissReaderViewController:)] == YES)
	{
		[delegate dismissReaderViewController:self]; // Dismiss the ReaderViewController
	}
	else // We have a "Delegate must respond to -dismissReaderViewController:" error
	{
		NSAssert(NO, @"Delegate must respond to -dismissReaderViewController:");
	}
}

#pragma mark - UIViewController methods

- (instancetype)initWithReaderDocument:(ReaderDocument *)object
{
	if ((self = [super initWithNibName:nil bundle:nil])) // Initialize superclass
	{
		if ((object != nil) && ([object isKindOfClass:[ReaderDocument class]])) // Valid object
		{
			userInterfaceIdiom = [UIDevice currentDevice].userInterfaceIdiom; // User interface idiom

			NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter]; // Default notification center

			[notificationCenter addObserver:self selector:@selector(applicationWillResign:) name:UIApplicationWillTerminateNotification object:nil];

			[notificationCenter addObserver:self selector:@selector(applicationWillResign:) name:UIApplicationWillResignActiveNotification object:nil];

			scrollViewOutset = ((userInterfaceIdiom == UIUserInterfaceIdiomPad) ? SCROLLVIEW_OUTSET_LARGE : SCROLLVIEW_OUTSET_SMALL);

			[object updateDocumentProperties]; document = object; // Retain the supplied ReaderDocument object for our use

			[ReaderThumbCache touchThumbCacheWithGUID:object.guid]; // Touch the document thumb cache directory
		}
		else // Invalid ReaderDocument object
		{
			self = nil;
		}
	}

	return self;
}

- (void)dealloc
{
	[[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewDidLoad
{
	[super viewDidLoad];

	assert(document != nil); // Must have a valid ReaderDocument

	self.view.backgroundColor = [UIColor grayColor]; // Neutral gray

	UIView *fakeStatusBar = nil; CGRect viewRect = self.view.bounds; // View bounds

	if ([self respondsToSelector:@selector(edgesForExtendedLayout)]) // iOS 7+
	{
		if ([self prefersStatusBarHidden] == NO) // Visible status bar
		{
			CGRect statusBarRect = viewRect; statusBarRect.size.height = STATUS_HEIGHT;
			fakeStatusBar = [[UIView alloc] initWithFrame:statusBarRect]; // UIView
			fakeStatusBar.autoresizingMask = UIViewAutoresizingFlexibleWidth;
			fakeStatusBar.backgroundColor = [UIColor blackColor];
			fakeStatusBar.contentMode = UIViewContentModeRedraw;
			fakeStatusBar.userInteractionEnabled = NO;

			viewRect.origin.y += STATUS_HEIGHT; viewRect.size.height -= STATUS_HEIGHT;
		}
	}

	CGRect scrollViewRect = CGRectInset(viewRect, -scrollViewOutset, 0.0f);
	theScrollView = [[UIScrollView alloc] initWithFrame:scrollViewRect]; // All
	theScrollView.autoresizesSubviews = NO; theScrollView.contentMode = UIViewContentModeRedraw;
	theScrollView.showsHorizontalScrollIndicator = NO; theScrollView.showsVerticalScrollIndicator = NO;
	theScrollView.scrollsToTop = NO; theScrollView.delaysContentTouches = NO; theScrollView.pagingEnabled = YES;
	theScrollView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
	theScrollView.backgroundColor = [UIColor clearColor]; theScrollView.delegate = self;
	[self.view addSubview:theScrollView];

	CGRect toolbarRect = viewRect; toolbarRect.size.height = TOOLBAR_HEIGHT;
	mainToolbar = [[ReaderMainToolbar alloc] initWithFrame:toolbarRect document:document]; // ReaderMainToolbar
	mainToolbar.delegate = self; // ReaderMainToolbarDelegate
	//TWS [self.view addSubview:mainToolbar];

	CGRect pagebarRect = self.view.bounds; pagebarRect.size.height = PAGEBAR_HEIGHT;
	pagebarRect.origin.y = (self.view.bounds.size.height - pagebarRect.size.height);
	mainPagebar = [[ReaderMainPagebar alloc] initWithFrame:pagebarRect document:document]; // ReaderMainPagebar
	mainPagebar.delegate = self; // ReaderMainPagebarDelegate
	[self.view addSubview:mainPagebar];

	if (fakeStatusBar != nil) [self.view addSubview:fakeStatusBar]; // Add status bar background view

	UITapGestureRecognizer *singleTapOne = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
	singleTapOne.numberOfTouchesRequired = 1; singleTapOne.numberOfTapsRequired = 1; singleTapOne.delegate = self;
	[self.view addGestureRecognizer:singleTapOne];

	UITapGestureRecognizer *doubleTapOne = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
	doubleTapOne.numberOfTouchesRequired = 1; doubleTapOne.numberOfTapsRequired = 2; doubleTapOne.delegate = self;
	[self.view addGestureRecognizer:doubleTapOne];

	UITapGestureRecognizer *doubleTapTwo = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
	doubleTapTwo.numberOfTouchesRequired = 2; doubleTapTwo.numberOfTapsRequired = 2; doubleTapTwo.delegate = self;
	[self.view addGestureRecognizer:doubleTapTwo];
    
    UISwipeGestureRecognizer *swipeUpDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeUpDown:)];
    swipeUpDown.direction = UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionUp;
    [self.view addGestureRecognizer:swipeUpDown];

    // TWS Long Press
    UILongPressGestureRecognizer* longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongTap:)];
    [self.view addGestureRecognizer:longPressRecognizer];

	[singleTapOne requireGestureRecognizerToFail:doubleTapOne]; // Single tap requires double tap to fail

	contentViews = [NSMutableDictionary new]; lastHideTime = [NSDate date];

	minimumPage = 1; maximumPage = [document.pageCount integerValue];
}

- (void)viewWillAppear:(BOOL)animated
{
	[super viewWillAppear:animated];

	if (CGSizeEqualToSize(lastAppearSize, CGSizeZero) == false)
	{
		if (CGSizeEqualToSize(lastAppearSize, self.view.bounds.size) == false)
		{
			[self updateContentViews:theScrollView]; // Update content views
		}

		lastAppearSize = CGSizeZero; // Reset view size tracking
	}
}

- (void)viewDidAppear:(BOOL)animated
{
	[super viewDidAppear:animated];

	if (CGSizeEqualToSize(theScrollView.contentSize, CGSizeZero) == true)
	{
		[self performSelector:@selector(showDocument) withObject:nil afterDelay:0.0];
	}

#if (READER_DISABLE_IDLE == TRUE) // Option

	[UIApplication sharedApplication].idleTimerDisabled = YES;

#endif // end of READER_DISABLE_IDLE Option
}

- (void)viewWillDisappear:(BOOL)animated
{
	[super viewWillDisappear:animated];

	lastAppearSize = self.view.bounds.size; // Track view size

#if (READER_DISABLE_IDLE == TRUE) // Option

	[UIApplication sharedApplication].idleTimerDisabled = NO;

#endif // end of READER_DISABLE_IDLE Option
}

- (void)viewDidDisappear:(BOOL)animated
{
	[super viewDidDisappear:animated];
}

- (void)viewDidUnload
{
#ifdef DEBUG
	NSLog(@"%s", __FUNCTION__);
#endif

	mainToolbar = nil; mainPagebar = nil;

	theScrollView = nil; contentViews = nil; lastHideTime = nil;

	documentInteraction = nil; printInteraction = nil;

	lastAppearSize = CGSizeZero; currentPage = 0;

	[super viewDidUnload];
}

- (BOOL)prefersStatusBarHidden
{
	return YES;
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
	return UIStatusBarStyleLightContent;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
	return YES;
}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
	if (userInterfaceIdiom == UIUserInterfaceIdiomPad) if (printInteraction != nil) [printInteraction dismissAnimated:NO];

	ignoreDidScroll = YES;
}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
{
	if (CGSizeEqualToSize(theScrollView.contentSize, CGSizeZero) == false)
	{
		[self updateContentViews:theScrollView]; lastAppearSize = CGSizeZero;
	}
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
	ignoreDidScroll = NO;
}

//TWS
- (void)updateContentViews
{
    if (currentPage > 0) {
        [self updateContentViews:theScrollView];
    }
}

- (void)didReceiveMemoryWarning
{
#ifdef DEBUG
	NSLog(@"%s", __FUNCTION__);
#endif

	[super didReceiveMemoryWarning];
}

#pragma mark - UIScrollViewDelegate methods

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
	if (ignoreDidScroll == NO) [self layoutContentViews:scrollView];
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
	[self handleScrollViewDidEnd:scrollView];
}

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
	[self handleScrollViewDidEnd:scrollView];
}

#pragma mark - UIGestureRecognizerDelegate methods

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)recognizer shouldReceiveTouch:(UITouch *)touch
{
	if ([touch.view isKindOfClass:[UIScrollView class]]) return YES;

	return NO;
}

#pragma mark - UIGestureRecognizer action methods

- (void)decrementPageNumber
{
	if ((maximumPage > minimumPage) && (currentPage != minimumPage))
	{
		CGPoint contentOffset = theScrollView.contentOffset; // Offset

		contentOffset.x -= theScrollView.bounds.size.width; // View X--

		[theScrollView setContentOffset:contentOffset animated:YES];
	}
}

- (void)incrementPageNumber
{
	if ((maximumPage > minimumPage) && (currentPage != maximumPage))
	{
		CGPoint contentOffset = theScrollView.contentOffset; // Offset

		contentOffset.x += theScrollView.bounds.size.width; // View X++

		[theScrollView setContentOffset:contentOffset animated:YES];
	}
}

- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer
{
	if (recognizer.state == UIGestureRecognizerStateRecognized)
	{
        //TWS
        if ([self.delegate respondsToSelector:@selector(handleSingleTapReader)])
            [self.delegate handleSingleTapReader];
        
		CGRect viewRect = recognizer.view.bounds; // View bounds

		CGPoint point = [recognizer locationInView:recognizer.view]; // Point

		CGRect areaRect = CGRectInset(viewRect, TAP_AREA_SIZE, 0.0f); // Area rect

		if (CGRectContainsPoint(areaRect, point) == true) // Single tap is inside area
		{
			NSNumber *key = [NSNumber numberWithInteger:currentPage]; // Page number key

			ReaderContentView *targetView = [contentViews objectForKey:key]; // View

			id target = [targetView processSingleTap:recognizer]; // Target object

			if (target != nil) // Handle the returned target object
			{
				if ([target isKindOfClass:[NSURL class]]) // Open a URL
				{
					NSURL *url = (NSURL *)target; // Cast to a NSURL object

					if (url.scheme == nil) // Handle a missing URL scheme
					{
						NSString *www = url.absoluteString; // Get URL string

						if ([www hasPrefix:@"www"] == YES) // Check for 'www' prefix
						{
							NSString *http = [[NSString alloc] initWithFormat:@"http://%@", www];

							url = [NSURL URLWithString:http]; // Proper http-based URL
						}
					}

					if ([[UIApplication sharedApplication] openURL:url] == NO)
					{
						#ifdef DEBUG
							NSLog(@"%s '%@'", __FUNCTION__, url); // Bad or unknown URL
						#endif
					}
				}
				else // Not a URL, so check for another possible object type
				{
					if ([target isKindOfClass:[NSNumber class]]) // Goto page
					{
						NSInteger number = [target integerValue]; // Number

						[self showDocumentPage:number]; // Show the page
					}
				}
			}
			else // Nothing active tapped in the target content view
			{
				if ([lastHideTime timeIntervalSinceNow] < -0.75) // Delay since hide
				{
					if ((mainToolbar.alpha < 1.0f) || (mainPagebar.alpha < 1.0f)) // Hidden
					{
						[mainToolbar showToolbar]; [mainPagebar showPagebar]; // Show
					}
				}
			}

			return;
		}

		CGRect nextPageRect = viewRect;
		nextPageRect.size.width = TAP_AREA_SIZE;
		nextPageRect.origin.x = (viewRect.size.width - TAP_AREA_SIZE);

		if (CGRectContainsPoint(nextPageRect, point) == true) // page++
		{
			[self incrementPageNumber]; return;
		}

		CGRect prevPageRect = viewRect;
		prevPageRect.size.width = TAP_AREA_SIZE;

		if (CGRectContainsPoint(prevPageRect, point) == true) // page--
		{
			[self decrementPageNumber]; return;
		}
	}
}

- (void)handleDoubleTap:(UITapGestureRecognizer *)recognizer
{
	if (recognizer.state == UIGestureRecognizerStateRecognized)
	{
		CGRect viewRect = recognizer.view.bounds; // View bounds

		CGPoint point = [recognizer locationInView:recognizer.view]; // Point

		CGRect zoomArea = CGRectInset(viewRect, TAP_AREA_SIZE, TAP_AREA_SIZE); // Area

		if (CGRectContainsPoint(zoomArea, point) == true) // Double tap is inside zoom area
		{
			NSNumber *key = [NSNumber numberWithInteger:currentPage]; // Page number key

			ReaderContentView *targetView = [contentViews objectForKey:key]; // View

			switch (recognizer.numberOfTouchesRequired) // Touches count
			{
				case 1: // One finger double tap: zoom++
				{
					[targetView zoomIncrement:recognizer]; break;
				}

				case 2: // Two finger double tap: zoom--
				{
					[targetView zoomDecrement:recognizer]; break;
				}
			}

			return;
		}

		CGRect nextPageRect = viewRect;
		nextPageRect.size.width = TAP_AREA_SIZE;
		nextPageRect.origin.x = (viewRect.size.width - TAP_AREA_SIZE);

		if (CGRectContainsPoint(nextPageRect, point) == true) // page++
		{
			[self incrementPageNumber]; return;
		}

		CGRect prevPageRect = viewRect;
		prevPageRect.size.width = TAP_AREA_SIZE;

		if (CGRectContainsPoint(prevPageRect, point) == true) // page--
		{
			[self decrementPageNumber]; return;
		}
	}
}

- (void)handleLongTap:(UITapGestureRecognizer *)recognizer
{
    //TWS
    if ([self.delegate respondsToSelector:@selector(handleLongTappReader)])
        [self.delegate handleLongTappReader];
}

- (void)handleSwipeUpDown:(UITapGestureRecognizer *)recognizer
{
    //TWS
    if ([self.delegate respondsToSelector:@selector(handleSwipeUpDown)])
        [self.delegate handleSwipeUpDown];
}

#pragma mark - ReaderContentViewDelegate methods

- (void)contentView:(ReaderContentView *)contentView touchesBegan:(NSSet *)touches
{
	if ((mainToolbar.alpha > 0.0f) || (mainPagebar.alpha > 0.0f))
	{
		if (touches.count == 1) // Single touches only
		{
			UITouch *touch = [touches anyObject]; // Touch info

			CGPoint point = [touch locationInView:self.view]; // Touch location

			CGRect areaRect = CGRectInset(self.view.bounds, TAP_AREA_SIZE, TAP_AREA_SIZE);

			if (CGRectContainsPoint(areaRect, point) == false) return;
		}

		[mainToolbar hideToolbar]; [mainPagebar hidePagebar]; // Hide

		lastHideTime = [NSDate date]; // Set last hide time
	}
}

#pragma mark - ReaderMainToolbarDelegate methods

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar doneButton:(UIButton *)button
{
#if (READER_STANDALONE == FALSE) // Option

	[self closeDocument]; // Close ReaderViewController

#endif // end of READER_STANDALONE Option
}

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar thumbsButton:(UIButton *)button
{
#if (READER_ENABLE_THUMBS == TRUE) // Option

    //TWS
    [[UIApplication sharedApplication] setStatusBarHidden:YES];
    
	if (printInteraction != nil) [printInteraction dismissAnimated:NO];

	ThumbsViewController *thumbsViewController = [[ThumbsViewController alloc] initWithReaderDocument:document];

	thumbsViewController.title = self.title; thumbsViewController.delegate = self; // ThumbsViewControllerDelegate

	thumbsViewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
	thumbsViewController.modalPresentationStyle = UIModalPresentationFullScreen;

	[self presentViewController:thumbsViewController animated:NO completion:NULL];

#endif // end of READER_ENABLE_THUMBS Option
}

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar exportButton:(UIButton *)button
{
	if (printInteraction != nil) [printInteraction dismissAnimated:YES];

	NSURL *fileURL = document.fileURL; // Document file URL

	documentInteraction = [UIDocumentInteractionController interactionControllerWithURL:fileURL];

	documentInteraction.delegate = self; // UIDocumentInteractionControllerDelegate

	[documentInteraction presentOpenInMenuFromRect:button.bounds inView:button animated:YES];
}

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar printButton:(UIButton *)button
{
	if ([UIPrintInteractionController isPrintingAvailable] == YES)
	{
		NSURL *fileURL = document.fileURL; // Document file URL

		if ([UIPrintInteractionController canPrintURL:fileURL] == YES)
		{
			printInteraction = [UIPrintInteractionController sharedPrintController];

			UIPrintInfo *printInfo = [UIPrintInfo printInfo];
			printInfo.duplex = UIPrintInfoDuplexLongEdge;
			printInfo.outputType = UIPrintInfoOutputGeneral;
			printInfo.jobName = document.fileName;

			printInteraction.printInfo = printInfo;
			printInteraction.printingItem = fileURL;
			printInteraction.showsPageRange = YES;

			if (userInterfaceIdiom == UIUserInterfaceIdiomPad) // Large device printing
			{
				[printInteraction presentFromRect:button.bounds inView:button animated:YES completionHandler:
					^(UIPrintInteractionController *pic, BOOL completed, NSError *error)
					{
						#ifdef DEBUG
							if ((completed == NO) && (error != nil)) NSLog(@"%s %@", __FUNCTION__, error);
						#endif
					}
				];
			}
			else // Handle printing on small device
			{
				[printInteraction presentAnimated:YES completionHandler:
					^(UIPrintInteractionController *pic, BOOL completed, NSError *error)
					{
						#ifdef DEBUG
							if ((completed == NO) && (error != nil)) NSLog(@"%s %@", __FUNCTION__, error);
						#endif
					}
				];
			}
		}
	}
}

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar emailButton:(UIButton *)button
{
	if ([MFMailComposeViewController canSendMail] == NO) return;

	if (printInteraction != nil) [printInteraction dismissAnimated:YES];

	unsigned long long fileSize = [document.fileSize unsignedLongLongValue];

	if (fileSize < 15728640ull) // Check attachment size limit (15MB)
	{
		NSURL *fileURL = document.fileURL; NSString *fileName = document.fileName;

		NSData *attachment = [NSData dataWithContentsOfURL:fileURL options:(NSDataReadingMapped|NSDataReadingUncached) error:nil];

		if (attachment != nil) // Ensure that we have valid document file attachment data available
		{
			MFMailComposeViewController *mailComposer = [MFMailComposeViewController new];

			[mailComposer addAttachmentData:attachment mimeType:@"application/pdf" fileName:fileName];

			[mailComposer setSubject:fileName]; // Use the document file name for the subject

			mailComposer.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
			mailComposer.modalPresentationStyle = UIModalPresentationFormSheet;

			mailComposer.mailComposeDelegate = self; // MFMailComposeViewControllerDelegate

			[self presentViewController:mailComposer animated:YES completion:NULL];
		}
	}
}

- (void)tappedInToolbar:(ReaderMainToolbar *)toolbar markButton:(UIButton *)button
{
#if (READER_BOOKMARKS == TRUE) // Option

	if (printInteraction != nil) [printInteraction dismissAnimated:YES];

	if ([document.bookmarks containsIndex:currentPage]) // Remove bookmark
	{
		[document.bookmarks removeIndex:currentPage]; [mainToolbar setBookmarkState:NO];
	}
	else // Add the bookmarked page number to the bookmark index set
	{
		[document.bookmarks addIndex:currentPage]; [mainToolbar setBookmarkState:YES];
	}

#endif // end of READER_BOOKMARKS Option
}

#pragma mark - MFMailComposeViewControllerDelegate methods

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
#ifdef DEBUG
	if ((result == MFMailComposeResultFailed) && (error != NULL)) NSLog(@"%@", error);
#endif

	[self dismissViewControllerAnimated:YES completion:NULL];
}

#pragma mark - UIDocumentInteractionControllerDelegate methods

- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller
{
	documentInteraction = nil;
}

#pragma mark - ThumbsViewControllerDelegate methods

- (void)thumbsViewController:(ThumbsViewController *)viewController gotoPage:(NSInteger)page
{
#if (READER_ENABLE_THUMBS == TRUE) // Option

	[self showDocumentPage:page];

#endif // end of READER_ENABLE_THUMBS Option
}

- (void)dismissThumbsViewController:(ThumbsViewController *)viewController
{
#if (READER_ENABLE_THUMBS == TRUE) // Option

	[self dismissViewControllerAnimated:NO completion:NULL];

#endif // end of READER_ENABLE_THUMBS Option
}

#pragma mark - ReaderMainPagebarDelegate methods

- (void)pagebar:(ReaderMainPagebar *)pagebar gotoPage:(NSInteger)page
{
	[self showDocumentPage:page];
}

#pragma mark - UIApplication notification methods

- (void)applicationWillResign:(NSNotification *)notification
{
	[document archiveDocumentProperties]; // Save any ReaderDocument changes

	if (userInterfaceIdiom == UIUserInterfaceIdiomPad) if (printInteraction != nil) [printInteraction dismissAnimated:NO];
}

@end