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//
// GTMProgressMonitorInputStream.m
//
// Copyright 2007-2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import <Foundation/Foundation.h>
// The monitored input stream calls back into the monitor delegate
// with the number of bytes and total size
//
// - (void)inputStream:(GTMProgressMonitorInputStream *)stream
// hasDeliveredByteCount:(unsigned long long)numberOfBytesRead
// ofTotalByteCount:(unsigned long long)dataLength;
@interface GTMProgressMonitorInputStream : NSInputStream {
NSInputStream *inputStream_; // encapsulated stream that does the work
unsigned long long dataSize_; // size of data in the source
unsigned long long numBytesRead_; // bytes read from the input stream so far
__weak id monitorDelegate_; // WEAK, not retained
SEL monitorSelector_;
__weak id monitorSource_; // WEAK, not retained
}
// Length is passed to the progress callback; it may be zero if the progress
// callback can handle that (mainly meant so the monitor delegate can update the
// bounds/position for a progress indicator.
+ (id)inputStreamWithStream:(NSInputStream *)input
length:(unsigned long long)length;
- (id)initWithStream:(NSInputStream *)input
length:(unsigned long long)length;
// The monitor is called when bytes have been read
//
// monitorDelegate should respond to a selector with a signature matching:
//
// - (void)inputStream:(GTMProgressMonitorInputStream *)stream
// hasDeliveredBytes:(unsigned long long)numReadSoFar
// ofTotalBytes:(unsigned long long)total
//
// |total| will be the length passed when this GTMProgressMonitorInputStream was
// created.
- (void)setMonitorDelegate:(id)monitorDelegate // not retained
selector:(SEL)monitorSelector;
- (id)monitorDelegate;
- (SEL)monitorSelector;
// The source argument lets the delegate know the source of this input stream.
// this class does nothing w/ this, it's just here to provide context to your
// monitorDelegate.
- (void)setMonitorSource:(id)source; // not retained
- (id)monitorSource;
@end
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