/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Alibaba Group
*
* 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 "FLBFlutterViewContainer.h"
#import "FLBFlutterApplication.h"
#import "FLBStackCache.h"
#import "FLBStackCacheObjectImg.h"
#import "FLBMemoryInspector.h"
#import "Service_NavigationService.h"
#import "FlutterBoostConfig.h"
#define FLUTTER_VIEW [FLBFlutterApplication sharedApplication].flutterViewController.view
#define FLUTTER_VC [FLBFlutterApplication sharedApplication].flutterViewController
#define FLUTTER_APP [FLBFlutterApplication sharedApplication]
@interface FLBFlutterViewContainer ()
@property (nonatomic,copy,readwrite) NSString *name;
@property (nonatomic,strong,readwrite) NSDictionary *params;
@property (nonatomic,strong) UIImageView *screenShotView;
@property (nonatomic,assign) long long identifier;
@property (nonatomic,assign) BOOL interactiveGestureActive;
@end
@implementation FLBFlutterViewContainer
- (void)setName:(NSString *)name params:(NSDictionary *)params
{
if(!_name && name){
_name = name;
_params = params;
[Service_NavigationService didInitPageContainer:^(NSNumber *r) {}
pageName:name
params:params
uniqueId:[self uniqueIDString]];
}
}
static NSUInteger kInstanceCounter = 0;
+ (NSUInteger)instanceCounter
{
return kInstanceCounter;
}
+ (void)instanceCounterIncrease
{
kInstanceCounter++;
if(kInstanceCounter == 1){
[FLUTTER_APP resume];
}
}
+ (void)instanceCounterDecrease
{
kInstanceCounter--;
if([self.class instanceCounter] == 0){
[[FLBStackCache sharedInstance] clear];
[[FLBFlutterApplication sharedApplication] pause];
}
}
- (NSString *)uniqueIDString
{
return @(_identifier).stringValue;
}
- (instancetype)init
{
if(self = [super init]){
static long long sCounter = 0;
_identifier = sCounter++;
[self.class instanceCounterIncrease];
[NSNotificationCenter.defaultCenter addObserver:self
selector:@selector(flutterViewDidShow:) name:@"flutter_boost_container_showed"
object:nil];
}
return self;
}
- (void)flutterViewDidAppear:(NSDictionary *)params
{
//Notify flutter view appeared.
}
- (void)flutterViewDidShow:(NSNotification *)notification
{
__weak typeof(self) weakSelf = self;
if([notification.object isEqual: self.uniqueIDString]){
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf showFlutterView];
});
}
}
- (void)dealloc
{
[self notifyWillDealloc];
[NSNotificationCenter.defaultCenter removeObserver:self];
}
- (void)notifyWillDealloc
{
[Service_NavigationService willDeallocPageContainer:^(NSNumber *r) {}
pageName:_name params:_params
uniqueId:[self uniqueIDString]];
[[FLBStackCache sharedInstance] remove:self.uniqueIDString];
[[FLBFlutterApplication sharedApplication] removeViewController:self];
[self.class instanceCounterDecrease];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = UIColor.whiteColor;
self.screenShotView = [[UIImageView alloc] initWithFrame:self.view.bounds];
self.screenShotView.backgroundColor = [UIColor whiteColor];
[self.view addSubview:self.screenShotView];
}
#pragma mark - ScreenShots
- (UIImage *)takeScreenShot
{
CGFloat scale = 1;
switch ([FLBMemoryInspector.sharedInstance currentCondition]) {
case FLBMemoryConditionNormal:
scale = 2;
break;
case FLBMemoryConditionLowMemory:
scale = 1;
break;
case FLBMemoryConditionExtremelyLow:
scale = 0.75;
break;
case FLBMemoryConditionAboutToDie:
return [UIImage new];
break;
case FLBMemoryConditionUnknown:
if([[FLBMemoryInspector sharedInstance] smallMemoryDevice]){
scale = 1;
}else{
scale = 2;
}
break;
}
self.screenShotView.opaque = YES;
CGRect flutterBounds = self.view.bounds;
CGSize snapshotSize = CGSizeMake(flutterBounds.size.width ,
flutterBounds.size.height);
UIGraphicsBeginImageContextWithOptions(snapshotSize, NO, scale);
[self.view drawViewHierarchyInRect:flutterBounds
afterScreenUpdates:NO];
UIImage *snapImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return snapImage;
}
- (void)saveScreenShot
{
UIImage *snapImage = [self takeScreenShot];
if(snapImage){
FLBStackCacheObjectImg *cImg = [[FLBStackCacheObjectImg alloc] initWithImage:snapImage];
[[FLBStackCache sharedInstance] pushObject:cImg key:self.uniqueIDString];
}
}
- (void)clearCurrentScreenShotImage
{
self.screenShotView.image = nil;
}
- (UIImage *)getSavedScreenShot
{
FLBStackCacheObjectImg *cImg = [[FLBStackCache sharedInstance] objectForKey:self.uniqueIDString];
return [cImg image];
}
- (BOOL)isFlutterViewAttatched
{
return FLUTTER_VIEW.superview == self.view;
}
- (void)attatchFlutterView
{
if([self isFlutterViewAttatched]) return;
[FLUTTER_VC willMoveToParentViewController:nil];
[FLUTTER_VC removeFromParentViewController];
[FLUTTER_VC didMoveToParentViewController:nil];
[FLUTTER_VC willMoveToParentViewController:self];
FLUTTER_VIEW.frame = self.view.bounds;
if(!self.screenShotView.image){
[self.view addSubview: FLUTTER_VIEW];
}else{
[self.view insertSubview:FLUTTER_VIEW belowSubview:self.screenShotView];
}
[self addChildViewController:FLUTTER_VC];
[FLUTTER_VC didMoveToParentViewController:self];
}
- (BOOL)showSnapShotVew
{
self.screenShotView.image = [self getSavedScreenShot];
if([self isFlutterViewAttatched]){
NSUInteger fIdx = [self.view.subviews indexOfObject:FLUTTER_VIEW];
NSUInteger sIdx = [self.view.subviews indexOfObject:self.screenShotView];
if(fIdx > sIdx){
[self.view insertSubview:FLUTTER_VIEW
atIndex:0];
}
}else{
}
return self.screenShotView.image != nil;
}
- (void)showFlutterView
{
if(FLUTTER_VIEW.superview != self.view) return;
if([self isFlutterViewAttatched] ){
NSUInteger fIdx = [self.view.subviews indexOfObject:FLUTTER_VIEW];
NSUInteger sIdx = [self.view.subviews indexOfObject:self.screenShotView];
self.screenShotView.backgroundColor = UIColor.clearColor;
if(sIdx > fIdx){
[self.view insertSubview:self.screenShotView belowSubview:FLUTTER_VIEW];
[self flutterViewDidAppear:@{@"uid":self.uniqueIDString?:@""}];
}
}
[self clearCurrentScreenShotImage];
//Invalidate obsolete screenshot.
[FLBStackCache.sharedInstance invalidate:self.uniqueIDString];
}
#pragma mark - Life circle methods
- (void)viewDidLayoutSubviews
{
[super viewDidLayoutSubviews];
[[FLBFlutterApplication sharedApplication] resume];
}
- (void)viewWillAppear:(BOOL)animated
{
if(self.navigationController.interactivePopGestureRecognizer.state == UIGestureRecognizerStateBegan){
self.interactiveGestureActive = true;
}
[[FLBFlutterApplication sharedApplication] resume];
//For new page we should attach flutter view in view will appear
//for better performance.
if(![[FLBFlutterApplication sharedApplication] contains:self]){
[self attatchFlutterView];
}
[self showSnapShotVew];
[Service_NavigationService willShowPageContainer:^(NSNumber *result) {}
pageName:_name
params:_params
uniqueId:self.uniqueIDString];
//Save some first time page info.
if(![FlutterBoostConfig sharedInstance].fPagename){
[FlutterBoostConfig sharedInstance].fPagename = _name;
[FlutterBoostConfig sharedInstance].fPageId = self.uniqueIDString;
[FlutterBoostConfig sharedInstance].fParams = _params;
}
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[[FLBFlutterApplication sharedApplication] resume];
//Ensure flutter view is attached.
[self attatchFlutterView];
[Service_NavigationService didShowPageContainer:^(NSNumber *result) {}
pageName:_name
params:_params
uniqueId:self.uniqueIDString];
[[FLBFlutterApplication sharedApplication] addUniqueViewController:self];
[super viewDidAppear:animated];
__weak typeof(self) weakSelf = self;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
(int64_t)(2 * NSEC_PER_SEC)),
dispatch_get_main_queue(),^{
if (weakSelf.isViewLoaded && weakSelf.view.window) {
// viewController is visible
[weakSelf showFlutterView];
}
});
self.interactiveGestureActive = NO;
}
- (void)viewWillDisappear:(BOOL)animated
{
//is top.
if([FLUTTER_APP isTop:self.uniqueIDString]
&& self.navigationController.interactivePopGestureRecognizer.state != UIGestureRecognizerStateBegan
&& !self.interactiveGestureActive){
[self saveScreenShot];
}
self.interactiveGestureActive = NO;
self.screenShotView.image = [self getSavedScreenShot];
if(self.screenShotView.image){
[self.view bringSubviewToFront:self.screenShotView];
}
[Service_NavigationService willDisappearPageContainer:^(NSNumber *result) {}
pageName:_name
params:_params
uniqueId:self.uniqueIDString];
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[Service_NavigationService didDisappearPageContainer:^(NSNumber *result) {}
pageName:_name
params:_params
uniqueId:self.uniqueIDString];
[self clearCurrentScreenShotImage];
[super viewDidDisappear:animated];
[FLUTTER_APP inactive];
self.interactiveGestureActive = NO;
}
#pragma mark - FLBViewControllerResultHandler
- (void)onRecievedResult:(NSDictionary *)resultData forKey:(NSString *)key
{
[Service_NavigationService onNativePageResult:^(NSNumber *finished) {}
uniqueId:self.uniqueIDString
key:key
resultData:resultData
params:@{}];
}
@end