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// Copyright 2014 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.
#include "ios/web/public/web_state/web_state_observer.h"
#include "ios/web/public/load_committed_details.h"
#include "ios/web/public/web_state/web_state.h"
namespace web {
int WebStateObserver::kInvalidFormKeyCode = -1;
WebStateObserver::WebStateObserver(WebState* web_state) : web_state_(nullptr) {
Observe(web_state);
}
WebStateObserver::WebStateObserver() : web_state_(nullptr) {}
WebStateObserver::~WebStateObserver() {
if (web_state_)
web_state_->RemoveObserver(this);
}
void WebStateObserver::Observe(WebState* web_state) {
if (web_state == web_state_) {
// Early exit to avoid infinite loops if we're in the middle of a callback.
return;
}
if (web_state_)
web_state_->RemoveObserver(this);
web_state_ = web_state;
if (web_state_)
web_state_->AddObserver(this);
}
void WebStateObserver::ResetWebState() {
web_state_->RemoveObserver(this);
web_state_ = nullptr;
}
} // namespace web
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