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//
// ReaderContentView.m
// Reader v2.6.1
//
// Created by Julius Oklamcak on 2011-07-01.
// Copyright © 2011-2013 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 "ReaderContentView.h"
#import "ReaderContentPage.h"
#import "ReaderThumbCache.h"
#import <QuartzCore/QuartzCore.h>
@implementation ReaderContentView
{
ReaderContentPage *theContentView;
ReaderContentThumb *theThumbView;
UIView *theContainerView;
CGFloat zoomAmount;
}
#pragma mark Constants
#define ZOOM_LEVELS 4
#if (READER_SHOW_SHADOWS == TRUE) // Option
#define CONTENT_INSET 4.0f
#else
#define CONTENT_INSET 2.0f
#endif // end of READER_SHOW_SHADOWS Option
#define PAGE_THUMB_LARGE 240
#define PAGE_THUMB_SMALL 144
static void *ReaderContentViewContext = &ReaderContentViewContext;
#pragma mark Properties
@synthesize message;
#pragma mark ReaderContentView functions
static inline CGFloat ZoomScaleThatFits(CGSize target, CGSize source)
{
CGFloat w_scale = (target.width / source.width);
CGFloat h_scale = (target.height / source.height);
return ((w_scale < h_scale) ? w_scale : h_scale);
}
#pragma mark ReaderContentView instance methods
- (void)updateMinimumMaximumZoom
{
CGRect targetRect = CGRectInset(self.bounds, CONTENT_INSET, CONTENT_INSET);
CGFloat zoomScale = ZoomScaleThatFits(targetRect.size, theContentView.bounds.size);
self.minimumZoomScale = zoomScale; // Set the minimum and maximum zoom scales
self.maximumZoomScale = (zoomScale * ZOOM_LEVELS); // Max number of zoom levels
zoomAmount = ((self.maximumZoomScale - self.minimumZoomScale) / ZOOM_LEVELS);
}
- (id)initWithFrame:(CGRect)frame fileURL:(NSURL *)fileURL page:(NSUInteger)page password:(NSString *)phrase
{
if ((self = [super initWithFrame:frame]))
{
self.scrollsToTop = NO;
self.delaysContentTouches = NO;
self.showsVerticalScrollIndicator = NO;
self.showsHorizontalScrollIndicator = NO;
self.contentMode = UIViewContentModeRedraw;
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.backgroundColor = [UIColor clearColor];
self.userInteractionEnabled = YES;
self.autoresizesSubviews = NO;
self.bouncesZoom = YES;
self.delegate = self;
theContentView = [[ReaderContentPage alloc] initWithURL:fileURL page:page password:phrase];
if (theContentView != nil) // Must have a valid and initialized content view
{
theContainerView = [[UIView alloc] initWithFrame:theContentView.bounds];
theContainerView.autoresizesSubviews = NO;
theContainerView.userInteractionEnabled = NO;
theContainerView.contentMode = UIViewContentModeRedraw;
theContainerView.autoresizingMask = UIViewAutoresizingNone;
theContainerView.backgroundColor = [UIColor whiteColor];
#if (READER_SHOW_SHADOWS == TRUE) // Option
theContainerView.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);
theContainerView.layer.shadowRadius = 4.0f; theContainerView.layer.shadowOpacity = 1.0f;
theContainerView.layer.shadowPath = [UIBezierPath bezierPathWithRect:theContainerView.bounds].CGPath;
#endif // end of READER_SHOW_SHADOWS Option
self.contentSize = theContentView.bounds.size; // Content size same as view size
self.contentOffset = CGPointMake((0.0f - CONTENT_INSET), (0.0f - CONTENT_INSET)); // Offset
self.contentInset = UIEdgeInsetsMake(CONTENT_INSET, CONTENT_INSET, CONTENT_INSET, CONTENT_INSET);
#if (READER_ENABLE_PREVIEW == TRUE) // Option
theThumbView = [[ReaderContentThumb alloc] initWithFrame:theContentView.bounds]; // Page thumb view
[theContainerView addSubview:theThumbView]; // Add the thumb view to the container view
#endif // end of READER_ENABLE_PREVIEW Option
[theContainerView addSubview:theContentView]; // Add the content view to the container view
[self addSubview:theContainerView]; // Add the container view to the scroll view
[self updateMinimumMaximumZoom]; // Update the minimum and maximum zoom scales
self.zoomScale = self.minimumZoomScale; // Set zoom to fit page content
}
[self addObserver:self forKeyPath:@"frame" options:0 context:ReaderContentViewContext];
self.tag = page; // Tag the view with the page number
}
return self;
}
- (void)dealloc
{
[self removeObserver:self forKeyPath:@"frame" context:ReaderContentViewContext];
}
- (void)showPageThumb:(NSURL *)fileURL page:(NSInteger)page password:(NSString *)phrase guid:(NSString *)guid
{
#if (READER_ENABLE_PREVIEW == TRUE) // Option
BOOL large = ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad); // Page thumb size
CGSize size = (large ? CGSizeMake(PAGE_THUMB_LARGE, PAGE_THUMB_LARGE) : CGSizeMake(PAGE_THUMB_SMALL, PAGE_THUMB_SMALL));
ReaderThumbRequest *request = [ReaderThumbRequest newForView:theThumbView fileURL:fileURL password:phrase guid:guid page:page size:size];
UIImage *image = [[ReaderThumbCache sharedInstance] thumbRequest:request priority:YES]; // Request the page thumb
if ([image isKindOfClass:[UIImage class]]) [theThumbView showImage:image]; // Show image from cache
#endif // end of READER_ENABLE_PREVIEW Option
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
if (context == ReaderContentViewContext) // Our context
{
if ((object == self) && [keyPath isEqualToString:@"frame"])
{
CGFloat oldMinimumZoomScale = self.minimumZoomScale;
[self updateMinimumMaximumZoom]; // Update zoom scale limits
if (self.zoomScale == oldMinimumZoomScale) // Old minimum
{
self.zoomScale = self.minimumZoomScale;
}
else // Check against minimum zoom scale
{
if (self.zoomScale < self.minimumZoomScale)
{
self.zoomScale = self.minimumZoomScale;
}
else // Check against maximum zoom scale
{
if (self.zoomScale > self.maximumZoomScale)
{
self.zoomScale = self.maximumZoomScale;
}
}
}
}
}
}
- (void)layoutSubviews
{
[super layoutSubviews];
CGSize boundsSize = self.bounds.size;
CGRect viewFrame = theContainerView.frame;
if (viewFrame.size.width < boundsSize.width)
viewFrame.origin.x = (((boundsSize.width - viewFrame.size.width) / 2.0f) + self.contentOffset.x);
else
viewFrame.origin.x = 0.0f;
if (viewFrame.size.height < boundsSize.height)
viewFrame.origin.y = (((boundsSize.height - viewFrame.size.height) / 2.0f) + self.contentOffset.y);
else
viewFrame.origin.y = 0.0f;
theContainerView.frame = viewFrame;
}
- (id)processSingleTap:(UITapGestureRecognizer *)recognizer
{
return [theContentView processSingleTap:recognizer];
}
- (void)zoomIncrement
{
CGFloat zoomScale = self.zoomScale;
if (zoomScale < self.maximumZoomScale)
{
zoomScale += zoomAmount; // += value
if (zoomScale > self.maximumZoomScale)
{
zoomScale = self.maximumZoomScale;
}
[self setZoomScale:zoomScale animated:YES];
}
}
- (void)zoomDecrement
{
CGFloat zoomScale = self.zoomScale;
if (zoomScale > self.minimumZoomScale)
{
zoomScale -= zoomAmount; // -= value
if (zoomScale < self.minimumZoomScale)
{
zoomScale = self.minimumZoomScale;
}
[self setZoomScale:zoomScale animated:YES];
}
}
- (void)zoomReset
{
if (self.zoomScale > self.minimumZoomScale)
{
self.zoomScale = self.minimumZoomScale;
}
}
#pragma mark UIScrollViewDelegate methods
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return theContainerView;
}
#pragma mark UIResponder instance methods
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event]; // Message superclass
[message contentView:self touchesBegan:touches]; // Message delegate
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesCancelled:touches withEvent:event]; // Message superclass
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesEnded:touches withEvent:event]; // Message superclass
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesMoved:touches withEvent:event]; // Message superclass
}
@end
#pragma mark -
//
// ReaderContentThumb class implementation
//
@implementation ReaderContentThumb
#pragma mark ReaderContentThumb instance methods
- (id)initWithFrame:(CGRect)frame
{
if ((self = [super initWithFrame:frame])) // Superclass init
{
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.clipsToBounds = YES; // Needed for aspect fill
}
return self;
}
@end