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@@ -1,481 +0,0 @@
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-/*****************************************************************************
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- * VLCFolderCollectionViewFlowLayout.m
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- * VLC for iOS
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- *****************************************************************************
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- * Copyright (c) 2014 VideoLAN. All rights reserved.
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- * $Id$
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- *
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- * Authors: Carola Nitz <nitz.carola # googlemail.com>
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- *
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- * Refer to the COPYING file of the official project for license.
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- *****************************************************************************/
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-
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-#import "VLCFolderCollectionViewFlowLayout.h"
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-#import <objc/runtime.h>
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-#import "VLCLibraryViewController.h"
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-
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-//framrate were motion appears fluent
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-#define LX_FRAMES_PER_SECOND 60.0
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-
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-#ifndef CGGEOMETRY_LXSUPPORT_H_
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-CG_INLINE CGPoint
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-LXS_CGPointAdd(CGPoint point1, CGPoint point2) {
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- return CGPointMake(point1.x + point2.x, point1.y + point2.y);
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-}
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-#endif
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-
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-typedef NS_ENUM(NSInteger, LXScrollingDirection) {
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- LXScrollingDirectionUnknown = 0,
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- LXScrollingDirectionUp,
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- LXScrollingDirectionDown,
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- LXScrollingDirectionLeft,
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- LXScrollingDirectionRight
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-};
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-
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-static NSString * const kLXScrollingDirectionKey = @"LXScrollingDirection";
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-static NSString * const kLXCollectionViewKeyPath = @"collectionView";
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-
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-@interface CADisplayLink (LX_userInfo)
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-@property (nonatomic, copy) NSDictionary *LX_userInfo;
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-@end
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-
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-@implementation CADisplayLink (LX_userInfo)
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-- (void) setLX_userInfo:(NSDictionary *) LX_userInfo {
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- objc_setAssociatedObject(self, "LX_userInfo", LX_userInfo, OBJC_ASSOCIATION_COPY);
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-}
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-
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-- (NSDictionary *) LX_userInfo {
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- return objc_getAssociatedObject(self, "LX_userInfo");
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-}
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-@end
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-
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-@interface UICollectionViewCell (VLCFolderCollectionViewLayout)
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-
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-- (UIImage *)LX_rasterizedImage;
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-
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-@end
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-
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-@implementation UICollectionViewCell (VLCFolderCollectionViewLayout)
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-
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-- (UIImage *)LX_rasterizedImage {
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- UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.isOpaque, 0.0f);
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- [self.layer renderInContext:UIGraphicsGetCurrentContext()];
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- UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
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- UIGraphicsEndImageContext();
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- return image;
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-}
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-
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-@end
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-
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-@interface VLCFolderCollectionViewFlowLayout ()
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-{
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- NSIndexPath *_selectedItemIndexPath;
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- UIView *_currentView;
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- CGPoint _currentViewCenter;
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- CGPoint _panTranslationInCollectionView;
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- CADisplayLink *_displayLink;
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- UIView *_folderView;
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- BOOL _didPan;
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-}
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-
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-@end
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-
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-@implementation VLCFolderCollectionViewFlowLayout
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-
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-- (void)setDefaults {
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- _scrollingSpeed = 300.0f;
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- _scrollingTriggerEdgeInsets = UIEdgeInsetsMake(50.0f, 50.0f, 50.0f, 50.0f);
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-}
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-
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-- (void)setupCollectionView {
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- _longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self
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- action:@selector(handleLongPressGesture:)];
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- _longPressGestureRecognizer.delegate = self;
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-
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- // Links the default long press gesture recognizer to the custom long press gesture recognizer we are creating now
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- // by enforcing failure dependency so that they doesn't clash.
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- for (UIGestureRecognizer *gestureRecognizer in self.collectionView.gestureRecognizers) {
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- if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
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- [gestureRecognizer requireGestureRecognizerToFail:_longPressGestureRecognizer];
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- }
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- }
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-
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- [self.collectionView addGestureRecognizer:_longPressGestureRecognizer];
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-
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- _panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self
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- action:@selector(handlePanGesture:)];
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- _panGestureRecognizer.delegate = self;
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- [self.collectionView addGestureRecognizer:_panGestureRecognizer];
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-
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- // Useful in multiple scenarios: one common scenario being when the Notification Center drawer is pulled down
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- [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleApplicationWillResignActive:) name: UIApplicationWillResignActiveNotification object:nil];
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-}
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-
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-- (id)init {
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- self = [super init];
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- if (self) {
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- [self setDefaults];
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- [self addObserver:self forKeyPath:kLXCollectionViewKeyPath options:NSKeyValueObservingOptionNew context:nil];
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- }
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- return self;
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-}
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-
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-- (id)initWithCoder:(NSCoder *)aDecoder {
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- self = [super initWithCoder:aDecoder];
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- if (self) {
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- [self setDefaults];
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- [self addObserver:self forKeyPath:kLXCollectionViewKeyPath options:NSKeyValueObservingOptionNew context:nil];
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- }
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- return self;
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-}
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-
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-- (void)dealloc {
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- [self invalidatesScrollTimer];
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- [self removeObserver:self forKeyPath:kLXCollectionViewKeyPath];
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- [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillResignActiveNotification object:nil];
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-}
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-
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-- (void)applyLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes {
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- if ([layoutAttributes.indexPath isEqual:_selectedItemIndexPath])
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- layoutAttributes.hidden = YES;
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-}
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-
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-- (id<VLCFolderCollectionViewDelegateFlowLayout>)delegate {
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- return (id<VLCFolderCollectionViewDelegateFlowLayout>)self.collectionView.delegate;
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-}
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-
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-- (void)invalidateLayoutIfNecessary {
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- NSIndexPath *newIndexPath = [self.collectionView indexPathForItemAtPoint:_currentView.center];
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- NSIndexPath *previousIndexPath = _selectedItemIndexPath;
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-
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- if ((newIndexPath == nil) || [newIndexPath isEqual:previousIndexPath]) {
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- _currentView.transform = CGAffineTransformMakeScale(1.1f, 1.1f);
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- [_folderView removeFromSuperview];
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- return;
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- }
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-
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- UICollectionViewCell *cell = [self.collectionView.dataSource collectionView:self.collectionView cellForItemAtIndexPath:newIndexPath];
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- if (!_folderView) {
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- _folderView = [[UIView alloc] initWithFrame:cell.frame];
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- _folderView.backgroundColor = [UIColor VLCOrangeTintColor];
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- _folderView.layer.cornerRadius = 8;
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- }
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- [self.collectionView insertSubview:_folderView atIndex:0];
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-
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- if (!CGPointEqualToPoint(_folderView.center,cell.center))
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- _folderView.frame = cell.frame;
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-
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- [UIView
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- animateWithDuration:0.3
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- delay:0.0
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- options:UIViewAnimationOptionBeginFromCurrentState
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- animations:^{
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- _currentView.transform = CGAffineTransformMakeScale(1.0f, 1.0f);
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- }
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- completion:nil];
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-}
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-
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-- (void)invalidatesScrollTimer {
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- if (!_displayLink.paused)
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- [_displayLink invalidate];
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- _displayLink = nil;
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-}
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-
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-- (void)setupScrollTimerInDirection:(LXScrollingDirection)direction {
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- if (!_displayLink.paused) {
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- LXScrollingDirection oldDirection = [_displayLink.LX_userInfo[kLXScrollingDirectionKey] integerValue];
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-
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- if (direction == oldDirection)
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- return;
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- }
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-
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- [self invalidatesScrollTimer];
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-
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- _displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(handleScroll:)];
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- _displayLink.LX_userInfo = @{ kLXScrollingDirectionKey : @(direction) };
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-
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- [_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
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-}
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-
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-#pragma mark - Target/Action methods
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-// Tight loop, allocate memory sparely, even if they are stack allocation.
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-- (void)handleScroll:(CADisplayLink *)displayLink {
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- LXScrollingDirection direction = (LXScrollingDirection)[displayLink.LX_userInfo[kLXScrollingDirectionKey] integerValue];
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- if (direction == LXScrollingDirectionUnknown)
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- return;
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-
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- CGSize frameSize = self.collectionView.bounds.size;
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- CGSize contentSize = self.collectionView.contentSize;
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- CGPoint contentOffset = self.collectionView.contentOffset;
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- // Important to have an integer `distance` as the `contentOffset` property automatically gets rounded
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- // and it would diverge from the view's center resulting in a "cell is slipping away under finger"-bug.
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- CGFloat distance = rint(self.scrollingSpeed / LX_FRAMES_PER_SECOND);
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- CGPoint translation = CGPointZero;
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-
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- switch(direction) {
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- case LXScrollingDirectionUp: {
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- distance = -distance;
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- CGFloat minY = 0.0f;
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-
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- if ((contentOffset.y + distance) <= minY)
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- distance = -contentOffset.y;
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-
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- translation = CGPointMake(0.0f, distance);
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- } break;
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- case LXScrollingDirectionDown: {
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- CGFloat maxY = MAX(contentSize.height, frameSize.height) - frameSize.height;
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-
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- if ((contentOffset.y + distance) >= maxY)
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- distance = maxY - contentOffset.y;
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-
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- translation = CGPointMake(0.0f, distance);
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- } break;
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- case LXScrollingDirectionLeft: {
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-
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- distance = -distance;
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- CGFloat minX = 0.0f;
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-
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- if ((contentOffset.x + distance) <= minX)
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- distance = -contentOffset.x;
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-
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- translation = CGPointMake(distance, 0.0f);
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- } break;
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- case LXScrollingDirectionRight: {
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- CGFloat maxX = MAX(contentSize.width, frameSize.width) - frameSize.width;
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-
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- if ((contentOffset.x + distance) >= maxX)
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- distance = maxX - contentOffset.x;
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-
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- translation = CGPointMake(distance, 0.0f);
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- } break;
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- default: {
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- // Do nothing...
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- } break;
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- }
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- _currentViewCenter = LXS_CGPointAdd(_currentViewCenter, translation);
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- _currentView.center = LXS_CGPointAdd(_currentViewCenter, _panTranslationInCollectionView);
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- self.collectionView.contentOffset = LXS_CGPointAdd(contentOffset, translation);
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-}
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-
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-- (void)handleLongPressGesture:(UILongPressGestureRecognizer *)gestureRecognizer {
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- //keeps the controller from dragging while not in editmode
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- if (!((VLCLibraryViewController *)self.delegate).isEditing) return;
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-
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- switch(gestureRecognizer.state) {
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- case UIGestureRecognizerStateBegan: {
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- NSIndexPath *currentIndexPath = [self.collectionView indexPathForItemAtPoint:[gestureRecognizer locationInView:self.collectionView]];
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- _selectedItemIndexPath = currentIndexPath;
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-
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- UICollectionViewCell *collectionViewCell = [self.collectionView cellForItemAtIndexPath:_selectedItemIndexPath];
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-
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- _currentView = [[UIView alloc] initWithFrame:collectionViewCell.frame];
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-
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- collectionViewCell.highlighted = YES;
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- UIImageView *highlightedImageView = [[UIImageView alloc] initWithImage:[collectionViewCell LX_rasterizedImage]];
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- highlightedImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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- highlightedImageView.alpha = 1.0f;
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-
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- collectionViewCell.highlighted = NO;
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- UIImageView *imageView = [[UIImageView alloc] initWithImage:[collectionViewCell LX_rasterizedImage]];
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- imageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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- imageView.alpha = 0.0f;
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-
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- [_currentView addSubview:imageView];
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- [_currentView addSubview:highlightedImageView];
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- [self.collectionView addSubview:_currentView];
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-
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- _currentViewCenter = _currentView.center;
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-
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- [UIView
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- animateWithDuration:0.3
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- delay:0.0
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- options:UIViewAnimationOptionBeginFromCurrentState
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- animations:^{
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- _currentView.transform = CGAffineTransformMakeScale(1.1f, 1.1f);
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- highlightedImageView.alpha = 0.0f;
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- imageView.alpha = 1.0f;
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- }
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- completion:^(BOOL finished) {
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- [highlightedImageView removeFromSuperview];
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- }];
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-
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- [self invalidateLayout];
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- } break;
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- case UIGestureRecognizerStateCancelled:
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- case UIGestureRecognizerStateEnded: {
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- if (_didPan) return;
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-
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- NSIndexPath *currentIndexPath = _selectedItemIndexPath;
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-
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- if (currentIndexPath) {
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- _selectedItemIndexPath = nil;
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- _currentViewCenter = CGPointZero;
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-
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- UICollectionViewLayoutAttributes *layoutAttributes = [self layoutAttributesForItemAtIndexPath:currentIndexPath];
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-
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- [UIView
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- animateWithDuration:0.3
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- delay:0.0
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- options:UIViewAnimationOptionBeginFromCurrentState
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- animations:^{
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- _currentView.transform = CGAffineTransformMakeScale(1.0f, 1.0f);
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- _currentView.center = layoutAttributes.center;
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- }
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- completion:^(BOOL finished) {
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-
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- [_currentView removeFromSuperview];
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- _currentView = nil;
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- [self invalidateLayout];
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-
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- }];
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- }
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- } break;
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-
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- default: break;
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- }
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-}
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-
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-- (void)handlePanGesture:(UIPanGestureRecognizer *)gestureRecognizer {
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-
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- switch (gestureRecognizer.state) {
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- case UIGestureRecognizerStateBegan:
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- _didPan = YES;
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- case UIGestureRecognizerStateChanged: {
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- _panTranslationInCollectionView = [gestureRecognizer translationInView:self.collectionView];
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- CGPoint viewCenter = _currentView.center = LXS_CGPointAdd(_currentViewCenter, _panTranslationInCollectionView);
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- [self invalidateLayoutIfNecessary];
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-
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- switch (self.scrollDirection) {
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- case UICollectionViewScrollDirectionVertical: {
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- if (viewCenter.y < (CGRectGetMinY(self.collectionView.bounds) + self.scrollingTriggerEdgeInsets.top)) {
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- [self setupScrollTimerInDirection:LXScrollingDirectionUp];
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- } else {
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- if (viewCenter.y > (CGRectGetMaxY(self.collectionView.bounds) - self.scrollingTriggerEdgeInsets.bottom)) {
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- [self setupScrollTimerInDirection:LXScrollingDirectionDown];
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- } else {
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- [self invalidatesScrollTimer];
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- }
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- }
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- } break;
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- case UICollectionViewScrollDirectionHorizontal: {
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- if (viewCenter.x < (CGRectGetMinX(self.collectionView.bounds) + self.scrollingTriggerEdgeInsets.left)) {
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- [self setupScrollTimerInDirection:LXScrollingDirectionLeft];
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- } else {
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- if (viewCenter.x > (CGRectGetMaxX(self.collectionView.bounds) - self.scrollingTriggerEdgeInsets.right)) {
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- [self setupScrollTimerInDirection:LXScrollingDirectionRight];
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- } else {
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- [self invalidatesScrollTimer];
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- }
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- }
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- } break;
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- }
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- } break;
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- case UIGestureRecognizerStateCancelled:
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- case UIGestureRecognizerStateEnded: {
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- _didPan = NO;
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- [_folderView removeFromSuperview];
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- _folderView = nil;
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- NSIndexPath *newIndexPath = [self.collectionView indexPathForItemAtPoint:_currentView.center];
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- NSIndexPath *currentIndexPath = _selectedItemIndexPath;
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-
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- if (newIndexPath != nil && ![currentIndexPath isEqual:newIndexPath] && ((VLCLibraryViewController *)self.delegate).isEditing) {
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- [UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
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- _currentView.transform = CGAffineTransformMakeScale(0.1f, 0.1f);
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- _currentView.center = [self layoutAttributesForItemAtIndexPath:newIndexPath].center;
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- } completion:^(BOOL finished) {
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- [self.delegate collectionView:self.collectionView requestToMoveItemAtIndexPath:currentIndexPath intoFolderAtIndexPath:newIndexPath];
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- _selectedItemIndexPath = nil;
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- _currentViewCenter = CGPointZero;
|
|
|
- [_currentView removeFromSuperview];
|
|
|
- _currentView = nil;
|
|
|
- }];
|
|
|
- } else if (currentIndexPath) {
|
|
|
- [UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
|
|
|
- _currentView.center = [self layoutAttributesForItemAtIndexPath:currentIndexPath].center;
|
|
|
- } completion:^(BOOL finished) {
|
|
|
- _selectedItemIndexPath = nil;
|
|
|
- _currentViewCenter = CGPointZero;
|
|
|
- [_currentView removeFromSuperview];
|
|
|
- _currentView = nil;
|
|
|
- [self invalidateLayout];
|
|
|
- }];
|
|
|
- }
|
|
|
- [self invalidatesScrollTimer];
|
|
|
- } break;
|
|
|
- default: {
|
|
|
- // Do nothing...
|
|
|
- } break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-#pragma mark - UICollectionViewLayout overridden methods
|
|
|
-
|
|
|
-- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
|
|
|
- NSArray *layoutAttributesForElementsInRect = [super layoutAttributesForElementsInRect:rect];
|
|
|
-
|
|
|
- for (UICollectionViewLayoutAttributes *layoutAttributes in layoutAttributesForElementsInRect) {
|
|
|
- switch (layoutAttributes.representedElementCategory) {
|
|
|
- case UICollectionElementCategoryCell: {
|
|
|
- [self applyLayoutAttributes:layoutAttributes];
|
|
|
- } break;
|
|
|
- default: {
|
|
|
- // Do nothing...
|
|
|
- } break;
|
|
|
- }
|
|
|
- }
|
|
|
- return layoutAttributesForElementsInRect;
|
|
|
-}
|
|
|
-
|
|
|
-- (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath {
|
|
|
- UICollectionViewLayoutAttributes *layoutAttributes = [super layoutAttributesForItemAtIndexPath:indexPath];
|
|
|
-
|
|
|
- switch (layoutAttributes.representedElementCategory) {
|
|
|
- case UICollectionElementCategoryCell: {
|
|
|
- [self applyLayoutAttributes:layoutAttributes];
|
|
|
- } break;
|
|
|
- default: {
|
|
|
- // Do nothing...
|
|
|
- } break;
|
|
|
- }
|
|
|
-
|
|
|
- return layoutAttributes;
|
|
|
-}
|
|
|
-#pragma mark - UIGestureRecognizerDelegate methods
|
|
|
-
|
|
|
-- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
|
|
|
- if ([self.panGestureRecognizer isEqual:gestureRecognizer]) {
|
|
|
- return (_selectedItemIndexPath != nil);
|
|
|
- }
|
|
|
- return YES;
|
|
|
-}
|
|
|
-
|
|
|
-- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
|
|
|
- if ([self.longPressGestureRecognizer isEqual:gestureRecognizer]) {
|
|
|
- return [self.panGestureRecognizer isEqual:otherGestureRecognizer];
|
|
|
- }
|
|
|
-
|
|
|
- if ([self.panGestureRecognizer isEqual:gestureRecognizer]) {
|
|
|
- return [self.longPressGestureRecognizer isEqual:otherGestureRecognizer];
|
|
|
- }
|
|
|
- return NO;
|
|
|
-}
|
|
|
-
|
|
|
-#pragma mark - Key-Value Observing methods
|
|
|
-
|
|
|
-- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
|
|
|
- if ([keyPath isEqualToString:kLXCollectionViewKeyPath]) {
|
|
|
- if (self.collectionView != nil) {
|
|
|
- [self setupCollectionView];
|
|
|
- } else {
|
|
|
- [self invalidatesScrollTimer];
|
|
|
- }
|
|
|
- }
|
|
|
-}
|
|
|
-#pragma mark - Notifications
|
|
|
-
|
|
|
-- (void)handleApplicationWillResignActive:(NSNotification *)notification {
|
|
|
- self.panGestureRecognizer.enabled = NO;
|
|
|
- self.panGestureRecognizer.enabled = YES;
|
|
|
-}
|
|
|
-
|
|
|
-@end
|
Carola Nitz