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//
// SDLHapticManager.m
// SmartDeviceLink-iOS
//
// Copyright © 2017 smartdevicelink. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "SDLFocusableItemLocator.h"
#import "SDLLogMacros.h"
#import "SDLNotificationConstants.h"
#import "SDLRectangle.h"
#import "SDLHapticRect.h"
#import "SDLSendHapticData.h"
#import "SDLTouch.h"
NS_ASSUME_NONNULL_BEGIN
@interface SDLFocusableItemLocator()
/**
Array of focusable view objects extracted from the projection window
*/
@property (nonatomic, strong) NSMutableArray<UIView *> *focusableViews;
/**
reference to SDLConnectionManager
*/
@property (nonatomic, weak) id<SDLConnectionManagerType> connectionManager;
@end
@implementation SDLFocusableItemLocator
- (instancetype)initWithViewController:(UIViewController *)viewController connectionManager:(id<SDLConnectionManagerType>)connectionManager {
self = [super init];
if(!self) {
return nil;
}
_viewController = viewController;
_connectionManager = connectionManager;
_enableHapticDataRequests = NO;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_projectionViewUpdated:) name:SDLDidUpdateProjectionView object:nil];
return self;
}
- (void)updateInterfaceLayout {
if (@available(iOS 9.0, *)) {
self.focusableViews = [[NSMutableArray alloc] init];
[self sdl_parseViewHierarchy:self.viewController.view];
// If there is a preferred view bring that into top of the array
NSUInteger preferredViewIndex = [self.focusableViews indexOfObject:self.viewController.view.subviews.lastObject.preferredFocusedView];
if (preferredViewIndex != NSNotFound && self.focusableViews.count > 1) {
[self.focusableViews exchangeObjectAtIndex:preferredViewIndex withObjectAtIndex:0];
}
[self sdl_sendHapticRPC];
}
}
/**
Crawls through the views recursively and adds focusable view into the member array
@param currentView is the view hierarchy to be processed
*/
- (void)sdl_parseViewHierarchy:(UIView *)currentView {
if (currentView == nil) {
SDLLogW(@"Error: Cannot parse nil view");
return;
}
if (@available(iOS 9.0, *)) {
NSArray *focusableSubviews = [currentView.subviews filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(UIView * _Nullable evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings) {
return (evaluatedObject.canBecomeFocused || [evaluatedObject isKindOfClass:[UIButton class]]);
}]];
BOOL isButton = [currentView isKindOfClass:[UIButton class]];
if ((currentView.canBecomeFocused || isButton) && focusableSubviews.count == 0) {
//if current view is focusable and it doesn't have any focusable sub views then add the current view and return
[self.focusableViews addObject:currentView];
return;
} else if (currentView.subviews.count > 0) {
// if current view has focusable sub views parse them recursively
NSArray<UIView *> *subviews = currentView.subviews;
for (UIView *childView in subviews) {
[self sdl_parseViewHierarchy:childView];
}
} else {
return;
}
}
}
/**
Iterates through the focusable views, extracts rectangular parameters, creates Haptic RPC request and sends it
*/
- (void)sdl_sendHapticRPC {
if (!self.enableHapticDataRequests) {
return;
}
NSMutableArray<SDLHapticRect *> *hapticRects = [[NSMutableArray alloc] init];
for (UIView *view in self.focusableViews) {
CGPoint originOnScreen = [self.viewController.view convertPoint:view.frame.origin toView:nil];
CGRect convertedRect = {originOnScreen, view.bounds.size};
SDLRectangle* rect = [[SDLRectangle alloc] initWithCGRect:(convertedRect)];
// using the view index as the id field in SendHapticData request (should be guaranteed unique)
NSUInteger rectId = [self.focusableViews indexOfObject:view];
SDLHapticRect *hapticRect = [[SDLHapticRect alloc] initWithId:(UInt32)rectId rect:rect];
[hapticRects addObject:hapticRect];
}
SDLSendHapticData* hapticRPC = [[SDLSendHapticData alloc] initWithHapticRectData:hapticRects];
[self.connectionManager sendConnectionManagerRequest:hapticRPC withResponseHandler:nil];
}
#pragma mark SDLFocusableItemHitTester functions
- (nullable UIView *)viewForPoint:(CGPoint)point {
UIView *selectedView = nil;
for (UIView *view in self.focusableViews) {
//Convert the absolute location to local location and check if that falls within view boundary
CGPoint localPoint = [view convertPoint:point fromView:self.viewController.view];
if ([view pointInside:localPoint withEvent:nil]) {
if (selectedView != nil) {
selectedView = nil;
break;
//the point has been indentified in two views. We cannot identify which with confidence.
} else {
selectedView = view;
}
}
}
return selectedView;
}
#pragma mark notifications
/**
Function that gets called when projection view updated notification occurs.
@param notification object with notification data
*/
- (void)sdl_projectionViewUpdated:(NSNotification *)notification {
[self updateInterfaceLayout];
}
@end
NS_ASSUME_NONNULL_END
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