react-native/React/Base/Surface/SurfaceHostingView/RCTSurfaceHostingProxyRootView.mm

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import "RCTSurfaceHostingProxyRootView.h"

#import <objc/runtime.h>

#import "RCTAssert.h"
#import "RCTBridge.h"
#import "RCTLog.h"
#import "RCTPerformanceLogger.h"
#import "RCTProfile.h"
#import "RCTRootContentView.h"
#import "RCTRootViewDelegate.h"
#import "RCTSurface.h"
#import "UIView+React.h"

static RCTSurfaceSizeMeasureMode convertToSurfaceSizeMeasureMode(RCTRootViewSizeFlexibility sizeFlexibility) {
  switch (sizeFlexibility) {
    case RCTRootViewSizeFlexibilityWidthAndHeight:
      return RCTSurfaceSizeMeasureModeWidthUndefined | RCTSurfaceSizeMeasureModeHeightUndefined;
    case RCTRootViewSizeFlexibilityWidth:
      return RCTSurfaceSizeMeasureModeWidthUndefined | RCTSurfaceSizeMeasureModeHeightExact;
    case RCTRootViewSizeFlexibilityHeight:
      return RCTSurfaceSizeMeasureModeWidthExact | RCTSurfaceSizeMeasureModeHeightUndefined;
    case RCTRootViewSizeFlexibilityNone:
      return RCTSurfaceSizeMeasureModeWidthExact | RCTSurfaceSizeMeasureModeHeightExact;
  }
}

static RCTRootViewSizeFlexibility convertToRootViewSizeFlexibility(RCTSurfaceSizeMeasureMode sizeMeasureMode) {
  switch (sizeMeasureMode) {
    case RCTSurfaceSizeMeasureModeWidthUndefined | RCTSurfaceSizeMeasureModeHeightUndefined:
      return RCTRootViewSizeFlexibilityWidthAndHeight;
    case RCTSurfaceSizeMeasureModeWidthUndefined | RCTSurfaceSizeMeasureModeHeightExact:
      return RCTRootViewSizeFlexibilityWidth;
    case RCTSurfaceSizeMeasureModeWidthExact | RCTSurfaceSizeMeasureModeHeightUndefined:
      return RCTRootViewSizeFlexibilityHeight;
    case RCTSurfaceSizeMeasureModeWidthExact | RCTSurfaceSizeMeasureModeHeightExact:
    default:
      return RCTRootViewSizeFlexibilityNone;
  }
}

@implementation RCTSurfaceHostingProxyRootView

- (instancetype)initWithBridge:(RCTBridge *)bridge
                    moduleName:(NSString *)moduleName
             initialProperties:(NSDictionary *)initialProperties
{
  RCTAssertMainQueue();
  RCTAssert(bridge, @"A bridge instance is required to create an RCTSurfaceHostingProxyRootView");
  RCTAssert(moduleName, @"A moduleName is required to create an RCTSurfaceHostingProxyRootView");

  RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"-[RCTSurfaceHostingProxyRootView init]", nil);

  _bridge = bridge;

  if (!bridge.isLoading) {
    [bridge.performanceLogger markStartForTag:RCTPLTTI];
  }

  // `RCTRootViewSizeFlexibilityNone` is the RCTRootView's default.
  RCTSurfaceSizeMeasureMode sizeMeasureMode = convertToSurfaceSizeMeasureMode(RCTRootViewSizeFlexibilityNone);

  if (self = [super initWithBridge:bridge moduleName:moduleName initialProperties:initialProperties sizeMeasureMode:sizeMeasureMode]) {
    self.backgroundColor = [UIColor whiteColor];
  }

  RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");

  return self;
}

- (instancetype)initWithBundleURL:(NSURL *)bundleURL
                       moduleName:(NSString *)moduleName
                initialProperties:(NSDictionary *)initialProperties
                    launchOptions:(NSDictionary *)launchOptions
{
  RCTBridge *bridge = [[RCTBridge alloc] initWithBundleURL:bundleURL
                                            moduleProvider:nil
                                             launchOptions:launchOptions];

  return [self initWithBridge:bridge moduleName:moduleName initialProperties:initialProperties];
}

RCT_NOT_IMPLEMENTED(- (instancetype)initWithFrame:(CGRect)frame)
RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)aDecoder)

# pragma mark proxy methods to RCTSurfaceHostingView

- (NSString *)moduleName
{
  return super.surface.moduleName;
}

- (UIView *)contentView
{
  return self;
}

- (NSNumber *)reactTag
{
  return super.surface.rootViewTag;
}

- (RCTRootViewSizeFlexibility)sizeFlexibility
{
  return convertToRootViewSizeFlexibility(super.sizeMeasureMode);
}

- (void)setSizeFlexibility:(RCTRootViewSizeFlexibility)sizeFlexibility
{
  super.sizeMeasureMode = convertToSurfaceSizeMeasureMode(sizeFlexibility);
}

- (NSDictionary *)appProperties
{
  return super.surface.properties;
}

- (void)setAppProperties:(NSDictionary *)appProperties
{
  [super.surface setProperties:appProperties];
}

- (UIView *)loadingView
{
  return super.activityIndicatorViewFactory ? super.activityIndicatorViewFactory() : nil;
}

- (void)setLoadingView:(UIView *)loadingView
{
  super.activityIndicatorViewFactory = ^UIView *(void) {
    return loadingView;
  };
}

#pragma mark RCTSurfaceDelegate proxying

- (void)surface:(RCTSurface *)surface didChangeStage:(RCTSurfaceStage)stage
{
  [super surface:surface didChangeStage:stage];
  if (RCTSurfaceStageIsRunning(stage)) {
    [_bridge.performanceLogger markStopForTag:RCTPLTTI];
    dispatch_async(dispatch_get_main_queue(), ^{
      [[NSNotificationCenter defaultCenter] postNotificationName:RCTContentDidAppearNotification
                                                          object:self];
    });
  }
}

- (void)surface:(RCTSurface *)surface didChangeIntrinsicSize:(CGSize)intrinsicSize
{
  [super surface:surface didChangeIntrinsicSize:intrinsicSize];

  [_delegate rootViewDidChangeIntrinsicSize:(RCTRootView *)self];
}

#pragma mark legacy

- (UIViewController *)reactViewController
{
  return _reactViewController ?: [super reactViewController];
}

#pragma mark unsupported

- (void)cancelTouches
{
  // Not supported.
}

@end