Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
5766 changed files with 423223 additions and 0 deletions
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+//
+//  NJKWebViewProgress.m
+//
+//  Created by Satoshi Aasano on 4/20/13.
+//  Copyright (c) 2013 Satoshi Asano. All rights reserved.
+//
+
+#import "NJKWebViewProgress.h"
+
+NSString *completeRPCURLPath = @"/njkwebviewprogressproxy/complete";
+
+const float NJKInitialProgressValue = 0.1f;
+const float NJKInteractiveProgressValue = 0.5f;
+const float NJKFinalProgressValue = 0.9f;
+
+@implementation NJKWebViewProgress
+{
+    NSUInteger _loadingCount;
+    NSUInteger _maxLoadCount;
+    NSURL *_currentURL;
+    BOOL _interactive;
+}
+
+- (id)init
+{
+    self = [super init];
+    if (self) {
+        _maxLoadCount = _loadingCount = 0;
+        _interactive = NO;
+    }
+    return self;
+}
+
+- (void)startProgress
+{
+    if (_progress < NJKInitialProgressValue) {
+        [self setProgress:NJKInitialProgressValue];
+    }
+}
+
+- (void)incrementProgress
+{
+    float progress = self.progress;
+    float maxProgress = _interactive ? NJKFinalProgressValue : NJKInteractiveProgressValue;
+    float remainPercent = (float)_loadingCount / (float)_maxLoadCount;
+    float increment = (maxProgress - progress) * remainPercent;
+    progress += increment;
+    progress = fmin(progress, maxProgress);
+    [self setProgress:progress];
+}
+
+- (void)completeProgress
+{
+    [self setProgress:1.0];
+}
+
+- (void)setProgress:(float)progress
+{
+    // progress should be incremental only
+    if (progress > _progress || progress == 0) {
+        _progress = progress;
+        if ([_progressDelegate respondsToSelector:@selector(webViewProgress:updateProgress:)]) {
+            [_progressDelegate webViewProgress:self updateProgress:progress];
+        }
+        if (_progressBlock) {
+            _progressBlock(progress);
+        }
+    }
+}
+
+- (void)reset
+{
+    _maxLoadCount = _loadingCount = 0;
+    _interactive = NO;
+    [self setProgress:0.0];
+}
+
+#pragma mark -
+#pragma mark UIWebViewDelegate
+
+- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
+{
+    if ([request.URL.path isEqualToString:completeRPCURLPath]) {
+        [self completeProgress];
+        return NO;
+    }
+    
+    BOOL ret = YES;
+    if ([_webViewProxyDelegate respondsToSelector:@selector(webView:shouldStartLoadWithRequest:navigationType:)]) {
+        ret = [_webViewProxyDelegate webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
+    }
+    
+    BOOL isFragmentJump = NO;
+    if (request.URL.fragment) {
+        NSString *nonFragmentURL = [request.URL.absoluteString stringByReplacingOccurrencesOfString:[@"#" stringByAppendingString:request.URL.fragment] withString:@""];
+        isFragmentJump = [nonFragmentURL isEqualToString:webView.request.URL.absoluteString];
+    }
+
+    BOOL isTopLevelNavigation = [request.mainDocumentURL isEqual:request.URL];
+
+    BOOL isHTTPOrLocalFile = [request.URL.scheme isEqualToString:@"http"] || [request.URL.scheme isEqualToString:@"https"] || [request.URL.scheme isEqualToString:@"file"];
+    if (ret && !isFragmentJump && isHTTPOrLocalFile && isTopLevelNavigation) {
+        _currentURL = request.URL;
+        [self reset];
+    }
+    return ret;
+}
+
+- (void)webViewDidStartLoad:(UIWebView *)webView
+{
+    if ([_webViewProxyDelegate respondsToSelector:@selector(webViewDidStartLoad:)]) {
+        [_webViewProxyDelegate webViewDidStartLoad:webView];
+    }
+
+    _loadingCount++;
+    _maxLoadCount = fmax(_maxLoadCount, _loadingCount);
+
+    [self startProgress];
+}
+
+- (void)webViewDidFinishLoad:(UIWebView *)webView
+{
+    if ([_webViewProxyDelegate respondsToSelector:@selector(webViewDidFinishLoad:)]) {
+        [_webViewProxyDelegate webViewDidFinishLoad:webView];
+    }
+    
+    _loadingCount--;
+    [self incrementProgress];
+    
+    NSString *readyState = [webView stringByEvaluatingJavaScriptFromString:@"document.readyState"];
+
+    BOOL interactive = [readyState isEqualToString:@"interactive"];
+    if (interactive) {
+        _interactive = YES;
+        NSString *waitForCompleteJS = [NSString stringWithFormat:@"window.addEventListener('load',function() { var iframe = document.createElement('iframe'); iframe.style.display = 'none'; iframe.src = '%@://%@%@'; document.body.appendChild(iframe);  }, false);", webView.request.mainDocumentURL.scheme, webView.request.mainDocumentURL.host, completeRPCURLPath];
+        [webView stringByEvaluatingJavaScriptFromString:waitForCompleteJS];
+    }
+    
+    BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.mainDocumentURL];
+    BOOL complete = [readyState isEqualToString:@"complete"];
+    if (complete && isNotRedirect) {
+        [self completeProgress];
+    }
+}
+
+- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
+{
+    if ([_webViewProxyDelegate respondsToSelector:@selector(webView:didFailLoadWithError:)]) {
+        [_webViewProxyDelegate webView:webView didFailLoadWithError:error];
+    }
+    
+    _loadingCount--;
+    [self incrementProgress];
+
+    NSString *readyState = [webView stringByEvaluatingJavaScriptFromString:@"document.readyState"];
+
+    BOOL interactive = [readyState isEqualToString:@"interactive"];
+    if (interactive) {
+        _interactive = YES;
+        NSString *waitForCompleteJS = [NSString stringWithFormat:@"window.addEventListener('load',function() { var iframe = document.createElement('iframe'); iframe.style.display = 'none'; iframe.src = '%@://%@%@'; document.body.appendChild(iframe);  }, false);", webView.request.mainDocumentURL.scheme, webView.request.mainDocumentURL.host, completeRPCURLPath];
+        [webView stringByEvaluatingJavaScriptFromString:waitForCompleteJS];
+    }
+    
+    BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.mainDocumentURL];
+    BOOL complete = [readyState isEqualToString:@"complete"];
+    if ((complete && isNotRedirect) || error) {
+        [self completeProgress];
+    }
+}
+
+#pragma mark - 
+#pragma mark Method Forwarding
+// for future UIWebViewDelegate impl
+
+- (BOOL)respondsToSelector:(SEL)aSelector
+{
+    if ( [super respondsToSelector:aSelector] )
+        return YES;
+    
+    if ([self.webViewProxyDelegate respondsToSelector:aSelector])
+        return YES;
+    
+    return NO;
+}
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector
+{
+    NSMethodSignature *signature = [super methodSignatureForSelector:selector];
+    if(!signature) {
+        if([_webViewProxyDelegate respondsToSelector:selector]) {
+            return [(NSObject *)_webViewProxyDelegate methodSignatureForSelector:selector];
+        }
+    }
+    return signature;
+}
+
+- (void)forwardInvocation:(NSInvocation*)invocation
+{
+    if ([_webViewProxyDelegate respondsToSelector:[invocation selector]]) {
+        [invocation invokeWithTarget:_webViewProxyDelegate];
+    }
+}
+
+@end