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/*
* Copyright (C) 2007 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "core/frame/History.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/Document.h"
#include "core/dom/ExceptionCode.h"
#include "core/frame/LocalFrame.h"
#include "core/loader/DocumentLoader.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/FrameLoaderClient.h"
#include "core/loader/HistoryItem.h"
#include "core/page/Page.h"
#include "platform/weborigin/KURL.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "wtf/MainThread.h"
namespace blink {
History::History(LocalFrame* frame)
: DOMWindowProperty(frame)
, m_lastStateObjectRequested(nullptr)
{
}
void History::trace(Visitor* visitor)
{
DOMWindowProperty::trace(visitor);
}
unsigned History::length() const
{
if (!m_frame || !m_frame->loader().client())
return 0;
return m_frame->loader().client()->backForwardLength();
}
SerializedScriptValue* History::state()
{
m_lastStateObjectRequested = stateInternal();
return m_lastStateObjectRequested.get();
}
SerializedScriptValue* History::stateInternal() const
{
if (!m_frame)
return 0;
if (HistoryItem* historyItem = m_frame->loader().currentItem())
return historyItem->stateObject();
return 0;
}
bool History::stateChanged() const
{
return m_lastStateObjectRequested != stateInternal();
}
bool History::isSameAsCurrentState(SerializedScriptValue* state) const
{
return state == stateInternal();
}
void History::back(ExecutionContext* context)
{
go(context, -1);
}
void History::forward(ExecutionContext* context)
{
go(context, 1);
}
void History::go(ExecutionContext* context, int distance)
{
if (!m_frame || !m_frame->loader().client())
return;
ASSERT(isMainThread());
Document* activeDocument = toDocument(context);
if (!activeDocument)
return;
if (!activeDocument->frame() || !activeDocument->frame()->canNavigate(*m_frame))
return;
if (distance)
m_frame->loader().client()->navigateBackForward(distance);
else
m_frame->reload(NormalReload, ClientRedirect);
}
KURL History::urlForState(const String& urlString)
{
Document* document = m_frame->document();
if (urlString.isNull())
return document->url();
if (urlString.isEmpty())
return document->baseURL();
return KURL(document->baseURL(), urlString);
}
void History::stateObjectAdded(PassRefPtr<SerializedScriptValue> data, const String& /* title */, const String& urlString, FrameLoadType type, ExceptionState& exceptionState)
{
if (!m_frame || !m_frame->page() || !m_frame->loader().documentLoader())
return;
KURL fullURL = urlForState(urlString);
if (!fullURL.isValid() || !m_frame->document()->securityOrigin()->canRequest(fullURL)) {
// We can safely expose the URL to JavaScript, as a) no redirection takes place: JavaScript already had this URL, b) JavaScript can only access a same-origin History object.
exceptionState.throwSecurityError("A history state object with URL '" + fullURL.elidedString() + "' cannot be created in a document with origin '" + m_frame->document()->securityOrigin()->toString() + "'.");
return;
}
m_frame->loader().updateForSameDocumentNavigation(fullURL, SameDocumentNavigationHistoryApi, data, type);
}
} // namespace blink
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