RCTDevLoadingView.m
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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTDevLoadingView.h"
#import <QuartzCore/QuartzCore.h>
#import "RCTBridge.h"
#import "RCTDefines.h"
#import "RCTModalHostViewController.h"
#import "RCTUtils.h"
#if RCT_DEV
static BOOL isEnabled = YES;
@implementation RCTDevLoadingView
{
UIWindow *_window;
UILabel *_label;
NSDate *_showDate;
}
@synthesize bridge = _bridge;
RCT_EXPORT_MODULE()
+ (void)setEnabled:(BOOL)enabled
{
isEnabled = enabled;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
+ (BOOL)requiresMainQueueSetup
{
return YES;
}
- (void)setBridge:(RCTBridge *)bridge
{
_bridge = bridge;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(hide)
name:RCTJavaScriptDidLoadNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(hide)
name:RCTJavaScriptDidFailToLoadNotification
object:nil];
if (bridge.loading) {
[self showWithURL:bridge.bundleURL];
}
}
RCT_EXPORT_METHOD(showMessage:(NSString *)message color:(UIColor *)color backgroundColor:(UIColor *)backgroundColor)
{
if (!isEnabled) {
return;
}
dispatch_async(dispatch_get_main_queue(), ^{
self->_showDate = [NSDate date];
if (!self->_window && !RCTRunningInTestEnvironment()) {
CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
self->_window = [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, screenWidth, 22)];
#if TARGET_OS_TV
self->_window.windowLevel = UIWindowLevelNormal + 1;
#else
self->_window.windowLevel = UIWindowLevelStatusBar + 1;
#endif
// set a root VC so rotation is supported
self->_window.rootViewController = [UIViewController new];
self->_label = [[UILabel alloc] initWithFrame:self->_window.bounds];
self->_label.font = [UIFont systemFontOfSize:12.0];
self->_label.textAlignment = NSTextAlignmentCenter;
[self->_window addSubview:self->_label];
}
self->_label.text = message;
self->_label.textColor = color;
self->_window.backgroundColor = backgroundColor;
self->_window.hidden = NO;
});
}
RCT_EXPORT_METHOD(hide)
{
if (!isEnabled) {
return;
}
dispatch_async(dispatch_get_main_queue(), ^{
const NSTimeInterval MIN_PRESENTED_TIME = 0.6;
NSTimeInterval presentedTime = [[NSDate date] timeIntervalSinceDate:self->_showDate];
NSTimeInterval delay = MAX(0, MIN_PRESENTED_TIME - presentedTime);
CGRect windowFrame = self->_window.frame;
[UIView animateWithDuration:0.25
delay:delay
options:0
animations:^{
self->_window.frame = CGRectOffset(windowFrame, 0, -windowFrame.size.height);
} completion:^(__unused BOOL finished) {
self->_window.frame = windowFrame;
self->_window.hidden = YES;
self->_window = nil;
}];
});
}
- (void)showWithURL:(NSURL *)URL
{
UIColor *color;
UIColor *backgroundColor;
NSString *source;
if (URL.fileURL) {
color = [UIColor grayColor];
backgroundColor = [UIColor blackColor];
source = @"pre-bundled file";
} else {
color = [UIColor whiteColor];
backgroundColor = [UIColor colorWithHue:1./3 saturation:1 brightness:.35 alpha:1];
source = [NSString stringWithFormat:@"%@:%@", URL.host, URL.port];
}
[self showMessage:[NSString stringWithFormat:@"Loading from %@...", source]
color:color
backgroundColor:backgroundColor];
}
- (void)updateProgress:(RCTLoadingProgress *)progress
{
if (!progress) {
return;
}
dispatch_async(dispatch_get_main_queue(), ^{
self->_label.text = [progress description];
});
}
@end
#else
@implementation RCTDevLoadingView
+ (NSString *)moduleName { return nil; }
+ (void)setEnabled:(BOOL)enabled { }
- (void)showWithURL:(NSURL *)URL { }
- (void)updateProgress:(RCTLoadingProgress *)progress { }
- (void)hide { }
@end
#endif