106 lines
3.3 KiB
Objective-C
106 lines
3.3 KiB
Objective-C
//
|
|
// SCManagedFrontFlashController.m
|
|
// Snapchat
|
|
//
|
|
// Created by Liu Liu on 5/4/15.
|
|
// Copyright (c) 2015 Liu Liu. All rights reserved.
|
|
//
|
|
|
|
#import "SCManagedFrontFlashController.h"
|
|
|
|
#import <SCFoundation/SCAssertWrapper.h>
|
|
#import <SCFoundation/SCLog.h>
|
|
#import <SCFoundation/SCThreadHelpers.h>
|
|
#import <SCFoundation/SCTrace.h>
|
|
|
|
@import UIKit;
|
|
|
|
@implementation SCManagedFrontFlashController {
|
|
BOOL _active;
|
|
UIView *_brightView;
|
|
CGFloat _brightnessWhenFlashAndTorchOff;
|
|
}
|
|
|
|
- (void)_setScreenWithFrontViewFlashActive:(BOOL)flashActive torchActive:(BOOL)torchActive
|
|
{
|
|
SCTraceStart();
|
|
SCAssertMainThread();
|
|
BOOL wasActive = _active;
|
|
_active = flashActive || torchActive;
|
|
if (!wasActive && _active) {
|
|
[self _activateFlash:flashActive];
|
|
} else if (wasActive && !_active) {
|
|
[self _deactivateFlash];
|
|
}
|
|
}
|
|
|
|
- (void)_activateFlash:(BOOL)flashActive
|
|
{
|
|
UIWindow *mainWindow = [[UIApplication sharedApplication] keyWindow];
|
|
if (!_brightView) {
|
|
CGRect frame = [mainWindow bounds];
|
|
CGFloat maxLength = MAX(CGRectGetWidth(frame), CGRectGetHeight(frame));
|
|
frame.size = CGSizeMake(maxLength, maxLength);
|
|
// Using the max length on either side to be compatible with different orientations
|
|
_brightView = [[UIView alloc] initWithFrame:frame];
|
|
_brightView.userInteractionEnabled = NO;
|
|
_brightView.backgroundColor = [UIColor whiteColor];
|
|
}
|
|
_brightnessWhenFlashAndTorchOff = [UIScreen mainScreen].brightness;
|
|
SCLogGeneralInfo(@"[SCManagedFrontFlashController] Activating flash, setting screen brightness from %f to 1.0",
|
|
_brightnessWhenFlashAndTorchOff);
|
|
[self _brightenLoop];
|
|
_brightView.alpha = flashActive ? 1.0 : 0.75;
|
|
[mainWindow addSubview:_brightView];
|
|
}
|
|
|
|
- (void)_deactivateFlash
|
|
{
|
|
SCLogGeneralInfo(@"[SCManagedFrontFlashController] Deactivating flash, setting screen brightness from %f to %f",
|
|
[UIScreen mainScreen].brightness, _brightnessWhenFlashAndTorchOff);
|
|
[UIScreen mainScreen].brightness = _brightnessWhenFlashAndTorchOff;
|
|
if (_brightView) {
|
|
[_brightView removeFromSuperview];
|
|
}
|
|
}
|
|
|
|
- (void)_brightenLoop
|
|
{
|
|
if (_active) {
|
|
SCLogGeneralInfo(@"[SCManagedFrontFlashController] In brighten loop, setting brightness from %f to 1.0",
|
|
[UIScreen mainScreen].brightness);
|
|
[UIScreen mainScreen].brightness = 1.0;
|
|
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC / 2), dispatch_get_main_queue(), ^(void) {
|
|
[self _brightenLoop];
|
|
});
|
|
} else {
|
|
SCLogGeneralInfo(@"[SCManagedFrontFlashController] Recording is done, brighten loop ends");
|
|
}
|
|
}
|
|
|
|
- (void)setFlashActive:(BOOL)flashActive
|
|
{
|
|
SCTraceStart();
|
|
if (_flashActive != flashActive) {
|
|
_flashActive = flashActive;
|
|
BOOL torchActive = _torchActive;
|
|
runOnMainThreadAsynchronously(^{
|
|
[self _setScreenWithFrontViewFlashActive:flashActive torchActive:torchActive];
|
|
});
|
|
}
|
|
}
|
|
|
|
- (void)setTorchActive:(BOOL)torchActive
|
|
{
|
|
SCTraceStart();
|
|
if (_torchActive != torchActive) {
|
|
_torchActive = torchActive;
|
|
BOOL flashActive = _flashActive;
|
|
runOnMainThreadAsynchronously(^{
|
|
[self _setScreenWithFrontViewFlashActive:flashActive torchActive:torchActive];
|
|
});
|
|
}
|
|
}
|
|
|
|
@end
|