Merge MatrixKit develop with commit hash: b85b736313bec0592bd1cabc68035d97f5331137

Riot/Modules/MatrixKit/Animators/MXKAttachmentAnimator.m

@@ -0,0 +1,161 @@
+/*
+ Copyright 2017 Aram Sargsyan
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "MXKAttachmentAnimator.h"
+#import "MXLog.h"
+
+@interface MXKAttachmentAnimator ()
+
+@property (nonatomic) PhotoBrowserAnimationType animationType;
+@property (nonatomic, weak) UIViewController <MXKSourceAttachmentAnimatorDelegate> *sourceViewController;
+
+@end
+
+@implementation MXKAttachmentAnimator
+
+#pragma mark - Lifecycle
+
+- (instancetype)initWithAnimationType:(PhotoBrowserAnimationType)animationType sourceViewController:(UIViewController <MXKSourceAttachmentAnimatorDelegate> *)viewController
+{
+    self = [self init];
+    if (self) {
+        self.animationType = animationType;
+        self.sourceViewController = viewController;
+    }
+    return self;
+}
+
+#pragma mark - Public
+
++ (CGRect)aspectFitImage:(UIImage *)image inFrame:(CGRect)targetFrame
+{
+    // Sanity check
+    if (!image)
+    {
+        MXLogDebug(@"[MXKAttachmentAnimator] aspectFitImage failed: image is nil");
+        return CGRectZero;
+    }
+    
+    if (CGSizeEqualToSize(image.size, targetFrame.size))
+    {
+        return targetFrame;
+    }
+    
+    CGFloat targetWidth = CGRectGetWidth(targetFrame);
+    CGFloat targetHeight = CGRectGetHeight(targetFrame);
+    CGFloat imageWidth = image.size.width;
+    CGFloat imageHeight = image.size.height;
+    
+    CGFloat factor = MIN(targetWidth/imageWidth, targetHeight/imageHeight);
+    
+    CGSize finalSize = CGSizeMake(imageWidth * factor, imageHeight * factor);
+    CGRect finalFrame = CGRectMake((targetWidth - finalSize.width)/2 + targetFrame.origin.x, (targetHeight - finalSize.height)/2 + targetFrame.origin.y, finalSize.width, finalSize.height);
+    
+    return finalFrame;
+}
+
+#pragma mark - Animations
+
+- (void)animateZoomInAnimation:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    //originalImageView
+    UIImageView *originalImageView = [self.sourceViewController originalImageView];
+    originalImageView.hidden = YES;
+    CGRect convertedFrame = [self.sourceViewController convertedFrameForOriginalImageView];
+    
+    //toViewController
+    UIViewController<MXKDestinationAttachmentAnimatorDelegate> *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
+    toViewController.view.frame = [transitionContext finalFrameForViewController:toViewController];
+    [[transitionContext containerView] addSubview:toViewController.view];
+    toViewController.view.alpha = 0.0;
+    
+    //destinationImageView
+    UIImageView *destinationImageView = [toViewController finalImageView];
+    destinationImageView.hidden = YES;
+    
+    //transitioningImageView
+    UIImageView *transitioningImageView = [[UIImageView alloc] initWithImage:originalImageView.image];
+    transitioningImageView.frame = convertedFrame;
+    [[transitionContext containerView] addSubview:transitioningImageView];
+    CGRect finalFrameForTransitioningView = [[self class] aspectFitImage:originalImageView.image inFrame:toViewController.view.frame];
+    
+    
+    //animation
+    [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
+        toViewController.view.alpha = 1.0;
+        transitioningImageView.frame = finalFrameForTransitioningView;
+    } completion:^(BOOL finished) {
+        [transitioningImageView removeFromSuperview];
+        destinationImageView.hidden = NO;
+        originalImageView.hidden = NO;
+        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
+    }];
+}
+
+- (void)animateZoomOutAnimation:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    //fromViewController
+    UIViewController<MXKDestinationAttachmentAnimatorDelegate> *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
+    UIImageView *destinationImageView = [fromViewController finalImageView];
+    destinationImageView.hidden = YES;
+    
+    //toViewController
+    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
+    toViewController.view.frame = [transitionContext finalFrameForViewController:toViewController];
+    [[transitionContext containerView] insertSubview:toViewController.view belowSubview:fromViewController.view];
+    UIImageView *originalImageView = [self.sourceViewController originalImageView];
+    originalImageView.hidden = YES;
+    CGRect convertedFrame = [self.sourceViewController convertedFrameForOriginalImageView];
+    
+    //transitioningImageView
+    UIImageView *transitioningImageView = [[UIImageView alloc] initWithImage:destinationImageView.image];
+    transitioningImageView.frame = [[self class] aspectFitImage:destinationImageView.image inFrame:destinationImageView.frame];
+    [[transitionContext containerView] addSubview:transitioningImageView];
+    
+    //animation
+    [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
+        fromViewController.view.alpha = 0.0;
+        transitioningImageView.frame = convertedFrame;
+    } completion:^(BOOL finished) {
+        [transitioningImageView removeFromSuperview];
+        destinationImageView.hidden = NO;
+        originalImageView.hidden = NO;
+        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
+    }];
+}
+
+#pragma mark - UIViewControllerAnimatedTransitioning
+
+- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    return 0.3;
+}
+
+- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    switch (self.animationType) {
+        case PhotoBrowserZoomInAnimation:
+            [self animateZoomInAnimation:transitionContext];
+            break;
+            
+        case PhotoBrowserZoomOutAnimation:
+            [self animateZoomOutAnimation:transitionContext];
+            break;
+    }
+}
+
+
+@end