| // Copyright 2013 The Flutter 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 "FLTWKProgressionDelegate.h" |
| |
| NSString *const FLTWKEstimatedProgressKeyPath = @"estimatedProgress"; |
| |
| @implementation FLTWKProgressionDelegate { |
| FlutterMethodChannel *_methodChannel; |
| } |
| |
| - (instancetype)initWithWebView:(WKWebView *)webView channel:(FlutterMethodChannel *)channel { |
| self = [super init]; |
| if (self) { |
| _methodChannel = channel; |
| [webView addObserver:self |
| forKeyPath:FLTWKEstimatedProgressKeyPath |
| options:NSKeyValueObservingOptionNew |
| context:nil]; |
| } |
| return self; |
| } |
| |
| - (void)stopObservingProgress:(WKWebView *)webView { |
| [webView removeObserver:self forKeyPath:FLTWKEstimatedProgressKeyPath]; |
| } |
| |
| - (void)observeValueForKeyPath:(NSString *)keyPath |
| ofObject:(id)object |
| change:(NSDictionary<NSKeyValueChangeKey, id> *)change |
| context:(void *)context { |
| if ([keyPath isEqualToString:FLTWKEstimatedProgressKeyPath]) { |
| NSNumber *newValue = |
| change[NSKeyValueChangeNewKey] ?: 0; // newValue is anywhere between 0.0 and 1.0 |
| int newValueAsInt = [newValue floatValue] * 100; // Anywhere between 0 and 100 |
| [_methodChannel invokeMethod:@"onProgress" |
| arguments:@{@"progress" : [NSNumber numberWithInt:newValueAsInt]}]; |
| } |
| } |
| |
| @end |
