react-native/React/Modules/RCTDevLoadingView.m

142 lines
3.8 KiB
Objective-C

/**
* 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 <QuartzCore/QuartzCore.h>
#import "RCTBridge.h"
#import "RCTDevLoadingView.h"
#import "RCTDefines.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];
}
- (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];
[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(), ^{
_showDate = [NSDate date];
if (!_window && !RCTRunningInTestEnvironment()) {
CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
_window = [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, screenWidth, 22)];
_window.windowLevel = UIWindowLevelStatusBar + 1;
_label = [[UILabel alloc] initWithFrame:_window.bounds];
_label.font = [UIFont systemFontOfSize:12.0];
_label.textAlignment = NSTextAlignmentCenter;
[_window addSubview:_label];
[_window makeKeyAndVisible];
}
_label.text = message;
_label.textColor = color;
_window.backgroundColor = backgroundColor;
_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:_showDate];
NSTimeInterval delay = MAX(0, MIN_PRESENTED_TIME - presentedTime);
CGRect windowFrame = _window.frame;
[UIView animateWithDuration:0.25
delay:delay
options:0
animations:^{
_window.frame = CGRectOffset(windowFrame, 0, -windowFrame.size.height);
} completion:^(__unused BOOL finished) {
_window.frame = windowFrame;
_window.hidden = YES;
_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];
}
@end
#else
@implementation RCTDevLoadingView
+ (NSString *)moduleName { return nil; }
+ (void)setEnabled:(BOOL)enabled { }
@end
#endif