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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "BackForwardListClientImpl.h"
#include "HistoryItem.h"
#include "WebViewClient.h"
#include "WebViewImpl.h"
using namespace WebCore;
namespace WebKit {
const char backForwardNavigationScheme[] = "chrome-back-forward";
BackForwardListClientImpl::BackForwardListClientImpl(WebViewImpl* webView)
: m_webView(webView)
{
}
BackForwardListClientImpl::~BackForwardListClientImpl()
{
}
void BackForwardListClientImpl::setCurrentHistoryItem(HistoryItem* item)
{
m_previousItem = m_currentItem;
m_currentItem = item;
}
HistoryItem* BackForwardListClientImpl::previousHistoryItem() const
{
return m_previousItem.get();
}
void BackForwardListClientImpl::addItem(PassRefPtr<HistoryItem> item)
{
m_previousItem = m_currentItem;
m_currentItem = item;
// If WebCore adds a new HistoryItem, it means this is a new navigation (ie,
// not a reload or back/forward).
m_webView->observeNewNavigation();
if (m_webView->client())
m_webView->client()->didAddHistoryItem();
}
void BackForwardListClientImpl::goToItem(HistoryItem* item)
{
m_previousItem = m_currentItem;
m_currentItem = item;
if (m_pendingHistoryItem == item)
m_pendingHistoryItem = 0;
}
HistoryItem* BackForwardListClientImpl::currentItem()
{
return m_currentItem.get();
}
HistoryItem* BackForwardListClientImpl::itemAtIndex(int index)
{
if (!m_webView->client() || index > forwardListCount() || -index > backListCount())
return 0;
// Since we don't keep the entire back/forward list, we have no way to
// properly implement this method. We return a dummy entry instead that we
// intercept in our FrameLoaderClient implementation in case WebCore asks
// to navigate to this HistoryItem.
// FIXME: We should change WebCore to handle history.{back,forward,go}
// differently. It should perhaps just ask the FrameLoaderClient to
// perform those navigations.
String url_string = String::format(
"%s://go/%d", backForwardNavigationScheme, index);
m_pendingHistoryItem =
HistoryItem::create(url_string, String(), 0.0);
return m_pendingHistoryItem.get();
}
int BackForwardListClientImpl::backListCount()
{
if (!m_webView->client())
return 0;
return m_webView->client()->historyBackListCount();
}
int BackForwardListClientImpl::forwardListCount()
{
if (!m_webView->client())
return 0;
return m_webView->client()->historyForwardListCount();
}
void BackForwardListClientImpl::close()
{
m_currentItem = 0;
m_previousItem = 0;
m_pendingHistoryItem = 0;
}
} // namespace WebKit
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