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// Copyright (c) 2006-2008 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 "chrome/browser/alternate_nav_url_fetcher.h"
#include "chrome/browser/navigation_controller.h"
#include "chrome/browser/navigation_entry.h"
#include "chrome/browser/views/info_bar_alternate_nav_url_view.h"
#include "chrome/browser/web_contents.h"
AlternateNavURLFetcher::AlternateNavURLFetcher(
const std::wstring& alternate_nav_url)
: alternate_nav_url_(alternate_nav_url),
controller_(NULL),
state_(NOT_STARTED),
navigated_to_entry_(false) {
NotificationService::current()->AddObserver(this,
NOTIFY_NAV_ENTRY_PENDING, NotificationService::AllSources());
}
AlternateNavURLFetcher::~AlternateNavURLFetcher() {
if (state_ == NOT_STARTED) {
// Never caught the NavigationController notification.
NotificationService::current()->RemoveObserver(this,
NOTIFY_NAV_ENTRY_PENDING, NotificationService::AllSources());
} // Otherwise, Observe() removed the observer already.
}
void AlternateNavURLFetcher::OnNavigatedToEntry() {
if (navigated_to_entry_)
return;
navigated_to_entry_ = true;
if (state_ == SUCCEEDED)
ShowInfobar();
}
void AlternateNavURLFetcher::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
controller_ = Source<NavigationController>(source).ptr();
if (!controller_->GetPendingEntry())
return; // No entry to attach ourselves to.
controller_->SetAlternateNavURLFetcher(this);
NotificationService::current()->RemoveObserver(this,
NOTIFY_NAV_ENTRY_PENDING, NotificationService::AllSources());
DCHECK_EQ(NOT_STARTED, state_);
state_ = IN_PROGRESS;
fetcher_.reset(new URLFetcher(GURL(alternate_nav_url_), URLFetcher::HEAD,
this));
fetcher_->set_request_context(controller_->profile()->GetRequestContext());
fetcher_->Start();
}
void AlternateNavURLFetcher::OnURLFetchComplete(const URLFetcher* source,
const GURL& url,
const URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data) {
DCHECK(fetcher_.get() == source);
if (status.is_success() &&
// HTTP 2xx, 401, and 407 all indicate that the target address exists.
(((response_code / 100) == 2) ||
(response_code == 401) || (response_code == 407))) {
state_ = SUCCEEDED;
if (navigated_to_entry_)
ShowInfobar();
} else {
state_ = FAILED;
}
}
void AlternateNavURLFetcher::ShowInfobar() {
const NavigationEntry* const entry = controller_->GetActiveEntry();
DCHECK(entry);
if (entry->GetType() != TAB_CONTENTS_WEB)
return;
TabContents* tab_contents =
controller_->GetTabContents(TAB_CONTENTS_WEB);
DCHECK(tab_contents);
WebContents* web_contents = tab_contents->AsWebContents();
// The infobar will auto-expire this view on the next user-initiated
// navigation, so we don't need to keep track of it.
web_contents->GetInfoBarView()->AddChildView(new InfoBarAlternateNavURLView(
alternate_nav_url_));
}
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