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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ios/web/crw_network_activity_indicator_manager.h"
#import <UIKit/UIKit.h>
#include "base/logging.h"
#include "base/mac/scoped_nsobject.h"
#include "base/threading/thread_checker.h"
@interface CRWNetworkActivityIndicatorManager () {
base::scoped_nsobject<NSMutableDictionary> _groupCounts;
NSUInteger _totalCount;
base::ThreadChecker _threadChecker;
}
@end
@implementation CRWNetworkActivityIndicatorManager
+ (CRWNetworkActivityIndicatorManager*)sharedInstance {
static CRWNetworkActivityIndicatorManager* instance =
[[CRWNetworkActivityIndicatorManager alloc] init];
return instance;
}
- (instancetype)init {
self = [super init];
if (self) {
_groupCounts.reset([[NSMutableDictionary alloc] init]);
_totalCount = 0;
}
return self;
}
- (void)startNetworkTaskForGroup:(NSString*)group {
[self startNetworkTasks:1 forGroup:group];
}
- (void)stopNetworkTaskForGroup:(NSString*)group {
[self stopNetworkTasks:1 forGroup:group];
}
- (void)startNetworkTasks:(NSUInteger)numTasks forGroup:(NSString*)group {
DCHECK(_threadChecker.CalledOnValidThread());
DCHECK(group);
DCHECK_GT(numTasks, 0U);
NSUInteger count = 0;
NSNumber* number = [_groupCounts objectForKey:group];
if (number) {
count = [number unsignedIntegerValue];
DCHECK_GT(count, 0U);
}
count += numTasks;
[_groupCounts setObject:@(count) forKey:group];
_totalCount += numTasks;
if (_totalCount == numTasks) {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
}
}
- (void)stopNetworkTasks:(NSUInteger)numTasks forGroup:(NSString*)group {
DCHECK(_threadChecker.CalledOnValidThread());
DCHECK(group);
DCHECK_GT(numTasks, 0U);
NSNumber* number = [_groupCounts objectForKey:group];
DCHECK(number);
NSUInteger count = [number unsignedIntegerValue];
DCHECK(count >= numTasks);
count -= numTasks;
if (count == 0) {
[_groupCounts removeObjectForKey:group];
} else {
[_groupCounts setObject:@(count) forKey:group];
}
_totalCount -= numTasks;
if (_totalCount == 0) {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
}
}
- (NSUInteger)clearNetworkTasksForGroup:(NSString*)group {
DCHECK(_threadChecker.CalledOnValidThread());
DCHECK(group);
NSNumber* number = [_groupCounts objectForKey:group];
if (!number) {
return 0;
}
NSUInteger count = [number unsignedIntegerValue];
DCHECK_GT(count, 0U);
[self stopNetworkTasks:count forGroup:group];
return count;
}
- (NSUInteger)numNetworkTasksForGroup:(NSString*)group {
DCHECK(_threadChecker.CalledOnValidThread());
DCHECK(group);
NSNumber* number = [_groupCounts objectForKey:group];
if (!number) {
return 0;
}
return [number unsignedIntegerValue];
}
- (NSUInteger)numTotalNetworkTasks {
DCHECK(_threadChecker.CalledOnValidThread());
return _totalCount;
}
@end
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