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// Copyright 2017 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.
#import <Foundation/Foundation.h>
#include "ios/web/public/web_state_observer.h"
#import "ios/web/public/web_state_user_data.h"
namespace web {
class NavigationItem;
// A helper object that tracks whether JavaScript dialogs should be blocked for
// a given WebState. State is reset every time a navigation is committed.
class JavaScriptDialogBlockingState
: public web::WebStateUserData<JavaScriptDialogBlockingState>,
public web::WebStateObserver {
~JavaScriptDialogBlockingState() override;
// Whether to show the blocking option for the next JavaScript dialog from its
// WebState.
bool show_blocking_option() { return dialog_count_ > 0; }
// Whether the blocking option has been selected for its WebState's most
// recent navigation.
bool blocked() { return blocked_item_ != nullptr; }
// Notifies the blocking state that a JavaScript dialog has been shown for its
// WebState.
void JavaScriptDialogWasShown() { ++dialog_count_; }
// Notifies the blocking state that the JavaScript dialog blocking option has
// been selected for its WebState's most recent navigation.
void JavaScriptDialogBlockingOptionSelected();
friend class web::WebStateUserData<JavaScriptDialogBlockingState>;
// Private constructor.
explicit JavaScriptDialogBlockingState(web::WebState* web_state);
// WebStateObserver:
void DidStartNavigation(web::WebState* web_state,
web::NavigationContext* navigation_context) override;
void WebStateDestroyed(web::WebState* web_state) override;
// The WebState this instance is observing. Will be null after
// WebStateDestroyed has been called.
web::WebState* web_state_ = nullptr;
// Whether to show the blocking option.
size_t dialog_count_ = 0;
// The NavigationItem for which JavaScript dialogs were blocked.
web::NavigationItem* blocked_item_ = nullptr;