Upstream (most of) ios/web/public

ios/web/public/web_state/web_state_observer_bridge.h

Index: ios/web/public/web_state/web_state_observer_bridge.h
diff --git a/ios/web/public/web_state/web_state_observer_bridge.h b/ios/web/public/web_state/web_state_observer_bridge.h
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+// Copyright 2015 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.
+
+#ifndef IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_BRIDGE_H_
+#define IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_BRIDGE_H_
+
+#import <Foundation/Foundation.h>
+
+#include <string>
+
+#import "base/ios/weak_nsobject.h"
+#import "ios/web/public/web_state/web_state_observer.h"
+
+// Observes page lifecyle events from Objective-C. To use as a
+// web::WebStateObserver, wrap in a web::WebStateObserverBridge.
+// NOTE: This is far from complete. Add new methods as needed.
+@protocol CRWWebStateObserver<NSObject>
+@optional
+
+// Page lifecycle methods. These are equivalent to the corresponding methods
+// in web::WebStateObserver.
+- (void)pageLoaded:(web::WebState*)webState;
+- (void)documentSubmitted:(web::WebState*)webState
+                 formName:(const std::string&)formName
+          userInteraction:(BOOL)userInteraction;
+- (void)formActivity:(web::WebState*)webState
+            formName:(const std::string&)formName
+           fieldName:(const std::string&)fieldName
+                type:(const std::string&)type
+               value:(const std::string&)value
+             keyCode:(int)keyCode
+               error:(BOOL)error;
+// Note: after |webStateDestroyed:| is invoked, the WebState being observed
+// is no longer valid.
+- (void)webStateDestroyed:(web::WebState*)webState;
+
+@end
+
+namespace web {
+
+class WebState;
+
+// Bridge to use an id<CRWWebStateObserver> as a web::WebStateObserver.
+// Will be added/removed as an observer of the underlying WebState during
+// construction/destruction. Instances should be owned by instances of the
+// class they're bridging.
+class WebStateObserverBridge : public web::WebStateObserver {
+ public:
+  WebStateObserverBridge(web::WebState* web_state,
+                         id<CRWWebStateObserver> observer);
+  ~WebStateObserverBridge() override;
+
+  // web::WebStateObserver:
+  // NOTE: This is far from complete. Add new methods as needed.
+  void PageLoaded(
+      web::PageLoadCompletionStatus load_completion_status) override;
+  void DocumentSubmitted(const std::string& form_name,
+                         bool user_interaction) override;
+  void FormActivityRegistered(const std::string& form_name,
+                              const std::string& field_name,
+                              const std::string& type,
+                              const std::string& value,
+                              int key_code,
+                              bool error) override;
+  void WebStateDestroyed() override;
+
+ private:
+  base::WeakNSProtocol<id<CRWWebStateObserver>> observer_;
+  DISALLOW_COPY_AND_ASSIGN(WebStateObserverBridge);
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_BRIDGE_H_