2014 snapchat source code
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//
// SCFeatureTapToFocusImpl.m
// SCCamera
//
// Created by Michel Loenngren on 4/5/18.
//
#import "SCFeatureTapToFocusAndExposureImpl.h"
#import "SCCameraTweaks.h"
#import "SCCapturer.h"
#import "SCFeatureContainerView.h"
#import "SCTapAnimationView.h"
#import <SCFoundation/SCLog.h>
#import <SCFoundation/SCTraceODPCompatible.h>
@interface SCFeatureTapToFocusAndExposureImpl ()
@property (nonatomic, weak) id<SCCapturer> capturer;
@property (nonatomic, weak) UIView<SCFeatureContainerView> *containerView;
@property (nonatomic) BOOL userTappedToFocusAndExposure;
@property (nonatomic) NSArray<id<SCFeatureCameraTapCommand>> *commands;
@end
@implementation SCFeatureTapToFocusAndExposureImpl
- (instancetype)initWithCapturer:(id<SCCapturer>)capturer commands:(NSArray<id<SCFeatureCameraTapCommand>> *)commands
{
if (self = [super init]) {
_capturer = capturer;
_commands = commands;
}
return self;
}
- (void)reset
{
SC_GUARD_ELSE_RETURN(_userTappedToFocusAndExposure);
_userTappedToFocusAndExposure = NO;
[_capturer continuousAutofocusAndExposureAsynchronouslyWithCompletionHandler:nil context:SCCapturerContext];
}
#pragma mark - SCFeature
- (void)configureWithView:(UIView<SCFeatureContainerView> *)view
{
SCTraceODPCompatibleStart(2);
_containerView = view;
}
- (void)forwardCameraOverlayTapGesture:(UIGestureRecognizer *)gestureRecognizer
{
SCTraceODPCompatibleStart(2);
CGPoint point = [gestureRecognizer locationInView:gestureRecognizer.view];
@weakify(self);
[_capturer convertViewCoordinates:[gestureRecognizer locationInView:_containerView]
completionHandler:^(CGPoint pointOfInterest) {
@strongify(self);
SC_GUARD_ELSE_RETURN(self);
SCLogCameraFeatureInfo(@"Tapped to focus: %@", NSStringFromCGPoint(pointOfInterest));
[self _applyTapCommands:pointOfInterest];
[self _showTapAnimationAtPoint:point forGesture:gestureRecognizer];
}
context:SCCapturerContext];
}
#pragma mark - Private helpers
- (void)_applyTapCommands:(CGPoint)pointOfInterest
{
SCTraceODPCompatibleStart(2);
for (id<SCFeatureCameraTapCommand> command in _commands) {
[command execute:pointOfInterest capturer:_capturer];
}
self.userTappedToFocusAndExposure = YES;
}
- (void)_showTapAnimationAtPoint:(CGPoint)point forGesture:(UIGestureRecognizer *)gestureRecognizer
{
SCTraceODPCompatibleStart(2);
SC_GUARD_ELSE_RETURN([self.containerView isTapGestureRecognizer:gestureRecognizer])
SCTapAnimationView *tapAnimationView = [SCTapAnimationView tapAnimationView];
[_containerView addSubview:tapAnimationView];
tapAnimationView.center = point;
[tapAnimationView showWithCompletion:^(SCTapAnimationView *view) {
[view removeFromSuperview];
}];
}
@end
@implementation SCFeatureCameraFocusTapCommand
- (void)execute:(CGPoint)pointOfInterest capturer:(id<SCCapturer>)capturer
{
[capturer setAutofocusPointOfInterestAsynchronously:pointOfInterest
completionHandler:nil
context:SCCapturerContext];
}
@end
@implementation SCFeatureCameraExposureTapCommand
- (void)execute:(CGPoint)pointOfInterest capturer:(id<SCCapturer>)capturer
{
[capturer setExposurePointOfInterestAsynchronously:pointOfInterest
fromUser:YES
completionHandler:nil
context:SCCapturerContext];
}
@end
@implementation SCFeatureCameraPortraitTapCommand
- (void)execute:(CGPoint)pointOfInterest capturer:(id<SCCapturer>)capturer
{
[capturer setPortraitModePointOfInterestAsynchronously:pointOfInterest
completionHandler:nil
context:SCCapturerContext];
}
@end