Thirdiron feature/unsafe for alert speedup (#215)

Add `disableJavscriptAlertBoxSafetyTimeout` feature by @jordanpwood.

Author: marcuswestin

Example Apps/ExampleApp-iOS/ExampleUIWebViewController.m

@@ -46,21 +46,32 @@ - (void)webViewDidFinishLoad:(UIWebView *)webView {
 }
 
 - (void)renderButtons:(UIWebView*)webView {
-    UIFont* font = [UIFont fontWithName:@"HelveticaNeue" size:12.0];
+    UIFont* font = [UIFont fontWithName:@"HelveticaNeue" size:11.0];
 
     UIButton *callbackButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
     [callbackButton setTitle:@"Call handler" forState:UIControlStateNormal];
     [callbackButton addTarget:self action:@selector(callHandler:) forControlEvents:UIControlEventTouchUpInside];
     [self.view insertSubview:callbackButton aboveSubview:webView];
-    callbackButton.frame = CGRectMake(10, 400, 100, 35);
+    callbackButton.frame = CGRectMake(0, 400, 100, 35);
     callbackButton.titleLabel.font = font;
 
     UIButton* reloadButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
     [reloadButton setTitle:@"Reload webview" forState:UIControlStateNormal];
     [reloadButton addTarget:webView action:@selector(reload) forControlEvents:UIControlEventTouchUpInside];
     [self.view insertSubview:reloadButton aboveSubview:webView];
-    reloadButton.frame = CGRectMake(110, 400, 100, 35);
+    reloadButton.frame = CGRectMake(90, 400, 100, 35);
     reloadButton.titleLabel.font = font;
+    
+    UIButton* safetyTimeoutButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
+    [safetyTimeoutButton setTitle:@"Disable safety timeout" forState:UIControlStateNormal];
+    [safetyTimeoutButton addTarget:self action:@selector(disableSafetyTimeout) forControlEvents:UIControlEventTouchUpInside];
+    [self.view insertSubview:safetyTimeoutButton aboveSubview:webView];
+    safetyTimeoutButton.frame = CGRectMake(190, 400, 120, 35);
+    safetyTimeoutButton.titleLabel.font = font;
+}
+
+- (void)disableSafetyTimeout {
+    [self.bridge disableJavscriptAlertBoxSafetyTimeout];
 }
 
 - (void)callHandler:(id)sender {

README.md

@@ -22,6 +22,7 @@ WebViewJavascriptBridge is used by a range of companies and projects. This is a
 - [鼎盛中华](https://itunes.apple.com/us/app/ding-sheng-zhong-hua/id537273940?mt=8)
 - [FRIL](https://fril.jp)
 - [留白·WHITE](http://liubaiapp.com)
+- [BrowZine](http://thirdiron.com/browzine/)
 
 Installation (iOS & OSX)
 ------------------------
@@ -198,6 +199,13 @@ Example:
 
 Optionally, set a `UIWebViewDelegate` if you need to respond to the [web view's lifecycle events](http://developer.apple.com/library/ios/documentation/uikit/reference/UIWebViewDelegate_Protocol/Reference/Reference.html).
 
+##### `[bridge disableJavscriptAlertBoxSafetyTimeout]`
+
+UNSAFE. Speed up bridge message passing by disabling the setTimeout safety check. It is only safe to disable this safety check if you do not call any of the javascript popup box functions (alert, confirm, and prompt). If you call any of these functions from the bridged javascript code, the app will hang.
+
+Example:
+
+	[self.bridge disableJavscriptAlertBoxSafetyTimeout];
 
 
 
@@ -230,3 +238,14 @@ bridge.callHandler("getScreenHeight", null, function(response) {
 	alert('Screen height:' + response)
 })
 ```
+
+
+##### `bridge.disableJavscriptAlertBoxSafetyTimeout()`
+
+Calling `bridge.disableJavscriptAlertBoxSafetyTimeout()` has the same effect as calling `[bridge disableJavscriptAlertBoxSafetyTimeout];` in ObjC.
+
+Example:
+
+```javascript
+bridge.disableJavscriptAlertBoxSafetyTimeout()
+```

Tests/WebViewJavascriptBridgeTests/BridgeTests.m

@@ -139,6 +139,26 @@ - (void)classSpecificTestJavascriptReceiveResponse:(Class)cls webView:(id)webVie
     }];
 }
 
+- (void)testJavascriptReceiveResponseWithoutSafetyTimeout {
+    [self classSpecificTestJavascriptReceiveResponseWithoutSafetyTimeout:[WebViewJavascriptBridge class] webView:_uiWebView];
+    [self classSpecificTestJavascriptReceiveResponseWithoutSafetyTimeout:[WKWebViewJavascriptBridge class] webView:_wkWebView];
+    [self waitForExpectationsWithTimeout:3 handler:NULL];
+}
+- (void)classSpecificTestJavascriptReceiveResponseWithoutSafetyTimeout:(Class)cls webView:(id)webView {
+    WebViewJavascriptBridge *bridge = [self bridgeForCls:cls webView:webView];
+    [bridge disableJavscriptAlertBoxSafetyTimeout];
+    loadEchoSample(webView);
+    XCTestExpectation *callbackInvocked = [self expectationWithDescription:@"Callback invoked"];
+    [bridge registerHandler:@"objcEchoToJs" handler:^(id data, WVJBResponseCallback responseCallback) {
+        responseCallback(data);
+    }];
+    [bridge callHandler:@"jsRcvResponseTest" data:nil responseCallback:^(id responseData) {
+        XCTAssertEqualObjects(responseData, @"Response from JS");
+        [callbackInvocked fulfill];
+    }];
+}
+
+
 - (WebViewJavascriptBridge*)bridgeForCls:(Class)cls webView:(id)webView {
     if (cls == [WebViewJavascriptBridge class]) {
         return [WebViewJavascriptBridge bridgeForWebView:webView];

WebViewJavascriptBridge/WKWebViewJavascriptBridge.h

@@ -26,6 +26,7 @@
 - (void)callHandler:(NSString*)handlerName data:(id)data responseCallback:(WVJBResponseCallback)responseCallback;
 - (void)reset;
 - (void)setWebViewDelegate:(id<WKNavigationDelegate>)webViewDelegate;
+- (void)disableJavscriptAlertBoxSafetyTimeout;
 
 @end
 

WebViewJavascriptBridge/WKWebViewJavascriptBridge.m

@@ -61,6 +61,10 @@ - (void)setWebViewDelegate:(id<WKNavigationDelegate>)webViewDelegate {
     _webViewDelegate = webViewDelegate;
 }
 
+- (void)disableJavscriptAlertBoxSafetyTimeout {
+    [_base disableJavscriptAlertBoxSafetyTimeout];
+}
+
 /* Internals
  ***********/
 

WebViewJavascriptBridge/WebViewJavascriptBridge.h

@@ -34,4 +34,6 @@
 - (void)callHandler:(NSString*)handlerName data:(id)data;
 - (void)callHandler:(NSString*)handlerName data:(id)data responseCallback:(WVJBResponseCallback)responseCallback;
 - (void)setWebViewDelegate:(WVJB_WEBVIEW_DELEGATE_TYPE*)webViewDelegate;
+- (void)disableJavscriptAlertBoxSafetyTimeout;
+
 @end

WebViewJavascriptBridge/WebViewJavascriptBridge.m

@@ -61,6 +61,11 @@ - (void)registerHandler:(NSString *)handlerName handler:(WVJBHandler)handler {
     _base.messageHandlers[handlerName] = [handler copy];
 }
 
+- (void)disableJavscriptAlertBoxSafetyTimeout {
+    [_base disableJavscriptAlertBoxSafetyTimeout];
+}
+
+
 /* Platform agnostic internals
  *****************************/
 

WebViewJavascriptBridge/WebViewJavascriptBridgeBase.h

@@ -40,5 +40,6 @@ typedef NSDictionary WVJBMessage;
 - (void)logUnkownMessage:(NSURL*)url;
 - (NSString *)webViewJavascriptCheckCommand;
 - (NSString *)webViewJavascriptFetchQueyCommand;
+- (void)disableJavscriptAlertBoxSafetyTimeout;
 
 @end

WebViewJavascriptBridge/WebViewJavascriptBridgeBase.m

@@ -153,6 +153,10 @@ -(NSString *)webViewJavascriptFetchQueyCommand {
     return @"WebViewJavascriptBridge._fetchQueue();";
 }
 
+- (void)disableJavscriptAlertBoxSafetyTimeout {
+    [self sendData:nil responseCallback:nil handlerName:@"_disableJavascriptAlertBoxSafetyTimeout"];
+}
+
 // Private
 // -------------------------------------------
 

WebViewJavascriptBridge/WebViewJavascriptBridge_JS.m

@@ -28,6 +28,7 @@
 	window.WebViewJavascriptBridge = {
 		registerHandler: registerHandler,
 		callHandler: callHandler,
+		disableJavscriptAlertBoxSafetyTimeout: disableJavscriptAlertBoxSafetyTimeout,
 		_fetchQueue: _fetchQueue,
 		_handleMessageFromObjC: _handleMessageFromObjC
 	};
@@ -41,6 +42,7 @@
 
 	var responseCallbacks = {};
 	var uniqueId = 1;
+	var dispatchMessagesWithTimeoutSafety = true;
 
 	function registerHandler(handlerName, handler) {
 		messageHandlers[handlerName] = handler;
@@ -53,6 +55,9 @@ function callHandler(handlerName, data, responseCallback) {
 		}
 		_doSend({ handlerName:handlerName, data:data }, responseCallback);
 	}
+	function disableJavscriptAlertBoxSafetyTimeout() {
+		dispatchMessagesWithTimeoutSafety = false;
+	}
 
 	function _doSend(message, responseCallback) {
 		if (responseCallback) {
@@ -71,7 +76,13 @@ function _fetchQueue() {
 	}
 
 	function _dispatchMessageFromObjC(messageJSON) {
-		setTimeout(function _timeoutDispatchMessageFromObjC() {
+		if (dispatchMessagesWithTimeoutSafety) {
+			setTimeout(_doDispatchMessageFromObjC);
+		} else {
+			 _doDispatchMessageFromObjC();
+		}
+		
+		function _doDispatchMessageFromObjC() {
 			var message = JSON.parse(messageJSON);
 			var messageHandler;
 			var responseCallback;
@@ -98,7 +109,7 @@ function _dispatchMessageFromObjC(messageJSON) {
 					handler(message.data, responseCallback);
 				}
 			}
-		});
+		}
 	}
 
 	function _handleMessageFromObjC(messageJSON) {
@@ -110,6 +121,8 @@ function _handleMessageFromObjC(messageJSON) {
 	messagingIframe.src = CUSTOM_PROTOCOL_SCHEME + '://' + QUEUE_HAS_MESSAGE;
 	document.documentElement.appendChild(messagingIframe);
 
+	registerHandler("_disableJavascriptAlertBoxSafetyTimeout", disableJavscriptAlertBoxSafetyTimeout);
+	
 	setTimeout(_callWVJBCallbacks, 0);
 	function _callWVJBCallbacks() {
 		var callbacks = window.WVJBCallbacks;