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/*
* Copyright (C) 2006, 2008, 2011, 2014 Apple Inc. All rights reserved.
* Copyright (C) 2012 Research In Motion Limited. 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 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 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.
*/
#pragma once
#include "BackForwardItemIdentifier.h"
#include "FloatRect.h"
#include "FrameLoaderTypes.h"
#include "IntPoint.h"
#include "IntRect.h"
#include "LengthBox.h"
#include "SerializedScriptValue.h"
#include <memory>
#include <wtf/RefCounted.h>
#include <wtf/text/WTFString.h>
#if PLATFORM(IOS_FAMILY)
#include "ViewportArguments.h"
#endif
#if PLATFORM(COCOA)
#import <wtf/RetainPtr.h>
typedef struct objc_object* id;
#endif
namespace WebCore {
class CachedPage;
class Document;
class FormData;
class HistoryItem;
class Image;
class ResourceRequest;
enum class PruningReason;
WEBCORE_EXPORT extern void (*notifyHistoryItemChanged)(HistoryItem&);
class HistoryItem : public RefCounted<HistoryItem> {
friend class BackForwardCache;
public:
static Ref<HistoryItem> create()
{
return adoptRef(*new HistoryItem);
}
static Ref<HistoryItem> create(const String& urlString, const String& title)
{
return adoptRef(*new HistoryItem(urlString, title));
}
static Ref<HistoryItem> create(const String& urlString, const String& title, const String& alternateTitle)
{
return adoptRef(*new HistoryItem(urlString, title, alternateTitle));
}
static Ref<HistoryItem> create(const String& urlString, const String& title, const String& alternateTitle, BackForwardItemIdentifier identifier)
{
return adoptRef(*new HistoryItem(urlString, title, alternateTitle, identifier));
}
WEBCORE_EXPORT ~HistoryItem();
WEBCORE_EXPORT Ref<HistoryItem> copy() const;
const BackForwardItemIdentifier& identifier() const { return m_identifier; }
// Resets the HistoryItem to its initial state, as returned by create().
void reset();
WEBCORE_EXPORT const String& originalURLString() const;
WEBCORE_EXPORT const String& urlString() const;
WEBCORE_EXPORT const String& title() const;
bool isInBackForwardCache() const { return m_cachedPage.get(); }
WEBCORE_EXPORT bool hasCachedPageExpired() const;
WEBCORE_EXPORT void setAlternateTitle(const String&);
WEBCORE_EXPORT const String& alternateTitle() const;
WEBCORE_EXPORT URL url() const;
WEBCORE_EXPORT URL originalURL() const;
WEBCORE_EXPORT const String& referrer() const;
WEBCORE_EXPORT const String& target() const;
WEBCORE_EXPORT bool isTargetItem() const;
WEBCORE_EXPORT FormData* formData();
WEBCORE_EXPORT String formContentType() const;
bool lastVisitWasFailure() const { return m_lastVisitWasFailure; }
WEBCORE_EXPORT const IntPoint& scrollPosition() const;
WEBCORE_EXPORT void setScrollPosition(const IntPoint&);
void clearScrollPosition();
WEBCORE_EXPORT bool shouldRestoreScrollPosition() const;
WEBCORE_EXPORT void setShouldRestoreScrollPosition(bool);
WEBCORE_EXPORT float pageScaleFactor() const;
WEBCORE_EXPORT void setPageScaleFactor(float);
WEBCORE_EXPORT const Vector<String>& documentState() const;
WEBCORE_EXPORT void setDocumentState(const Vector<String>&);
void clearDocumentState();
WEBCORE_EXPORT void setShouldOpenExternalURLsPolicy(ShouldOpenExternalURLsPolicy);
WEBCORE_EXPORT ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy() const;
void setURL(const URL&);
WEBCORE_EXPORT void setURLString(const String&);
WEBCORE_EXPORT void setOriginalURLString(const String&);
WEBCORE_EXPORT void setReferrer(const String&);
WEBCORE_EXPORT void setTarget(const String&);
WEBCORE_EXPORT void setTitle(const String&);
WEBCORE_EXPORT void setIsTargetItem(bool);
WEBCORE_EXPORT void setStateObject(RefPtr<SerializedScriptValue>&&);
SerializedScriptValue* stateObject() const { return m_stateObject.get(); }
void setItemSequenceNumber(long long number) { m_itemSequenceNumber = number; }
long long itemSequenceNumber() const { return m_itemSequenceNumber; }
void setDocumentSequenceNumber(long long number) { m_documentSequenceNumber = number; }
long long documentSequenceNumber() const { return m_documentSequenceNumber; }
void setFormInfoFromRequest(const ResourceRequest&);
WEBCORE_EXPORT void setFormData(RefPtr<FormData>&&);
WEBCORE_EXPORT void setFormContentType(const String&);
void setLastVisitWasFailure(bool wasFailure) { m_lastVisitWasFailure = wasFailure; }
WEBCORE_EXPORT void addChildItem(Ref<HistoryItem>&&);
void setChildItem(Ref<HistoryItem>&&);
WEBCORE_EXPORT HistoryItem* childItemWithTarget(const String&);
HistoryItem* childItemWithDocumentSequenceNumber(long long number);
WEBCORE_EXPORT const Vector<Ref<HistoryItem>>& children() const;
WEBCORE_EXPORT bool hasChildren() const;
void clearChildren();
bool shouldDoSameDocumentNavigationTo(HistoryItem& otherItem) const;
bool hasSameFrames(HistoryItem& otherItem) const;
bool isCurrentDocument(Document&) const;
#if PLATFORM(COCOA)
WEBCORE_EXPORT id viewState() const;
WEBCORE_EXPORT void setViewState(id);
#endif
#ifndef NDEBUG
int showTree() const;
int showTreeWithIndent(unsigned indentLevel) const;
#endif
#if PLATFORM(IOS_FAMILY)
FloatRect exposedContentRect() const { return m_exposedContentRect; }
void setExposedContentRect(FloatRect exposedContentRect) { m_exposedContentRect = exposedContentRect; }
IntRect unobscuredContentRect() const { return m_unobscuredContentRect; }
void setUnobscuredContentRect(IntRect unobscuredContentRect) { m_unobscuredContentRect = unobscuredContentRect; }
const FloatBoxExtent& obscuredInsets() const { return m_obscuredInsets; }
void setObscuredInsets(const FloatBoxExtent& insets) { m_obscuredInsets = insets; }
FloatSize minimumLayoutSizeInScrollViewCoordinates() const { return m_minimumLayoutSizeInScrollViewCoordinates; }
void setMinimumLayoutSizeInScrollViewCoordinates(FloatSize minimumLayoutSizeInScrollViewCoordinates) { m_minimumLayoutSizeInScrollViewCoordinates = minimumLayoutSizeInScrollViewCoordinates; }
IntSize contentSize() const { return m_contentSize; }
void setContentSize(IntSize contentSize) { m_contentSize = contentSize; }
float scale() const { return m_scale; }
bool scaleIsInitial() const { return m_scaleIsInitial; }
void setScaleIsInitial(bool scaleIsInitial) { m_scaleIsInitial = scaleIsInitial; }
void setScale(float newScale, bool isInitial)
{
m_scale = newScale;
m_scaleIsInitial = isInitial;
}
const ViewportArguments& viewportArguments() const { return m_viewportArguments; }
void setViewportArguments(const ViewportArguments& viewportArguments) { m_viewportArguments = viewportArguments; }
#endif
void notifyChanged();
void setWasRestoredFromSession(bool wasRestoredFromSession) { m_wasRestoredFromSession = wasRestoredFromSession; }
bool wasRestoredFromSession() const { return m_wasRestoredFromSession; }
#if !LOG_DISABLED
const char* logString() const;
#endif
private:
WEBCORE_EXPORT HistoryItem();
WEBCORE_EXPORT HistoryItem(const String& urlString, const String& title);
WEBCORE_EXPORT HistoryItem(const String& urlString, const String& title, const String& alternateTitle);
WEBCORE_EXPORT HistoryItem(const String& urlString, const String& title, const String& alternateTitle, BackForwardItemIdentifier);
void setCachedPage(std::unique_ptr<CachedPage>&&);
std::unique_ptr<CachedPage> takeCachedPage();
HistoryItem(const HistoryItem&);
static int64_t generateSequenceNumber();
bool hasSameDocumentTree(HistoryItem& otherItem) const;
String m_urlString;
String m_originalURLString;
String m_referrer;
String m_target;
String m_title;
String m_displayTitle;
IntPoint m_scrollPosition;
float m_pageScaleFactor { 0 }; // 0 indicates "unset".
Vector<String> m_documentState;
ShouldOpenExternalURLsPolicy m_shouldOpenExternalURLsPolicy { ShouldOpenExternalURLsPolicy::ShouldNotAllow };
Vector<Ref<HistoryItem>> m_children;
bool m_lastVisitWasFailure { false };
bool m_isTargetItem { false };
bool m_wasRestoredFromSession { false };
bool m_shouldRestoreScrollPosition { true };
// If two HistoryItems have the same item sequence number, then they are
// clones of one another. Traversing history from one such HistoryItem to
// another is a no-op. HistoryItem clones are created for parent and
// sibling frames when only a subframe navigates.
int64_t m_itemSequenceNumber { generateSequenceNumber() };
// If two HistoryItems have the same document sequence number, then they
// refer to the same instance of a document. Traversing history from one
// such HistoryItem to another preserves the document.
int64_t m_documentSequenceNumber { generateSequenceNumber() };
// Support for HTML5 History
RefPtr<SerializedScriptValue> m_stateObject;
// info used to repost form data
RefPtr<FormData> m_formData;
String m_formContentType;
// BackForwardCache controls these fields.
std::unique_ptr<CachedPage> m_cachedPage;
PruningReason m_pruningReason;
#if PLATFORM(IOS_FAMILY)
FloatRect m_exposedContentRect;
IntRect m_unobscuredContentRect;
FloatSize m_minimumLayoutSizeInScrollViewCoordinates;
IntSize m_contentSize;
FloatBoxExtent m_obscuredInsets;
float m_scale { 0 }; // Note that UIWebView looks for a non-zero value, so this has to start as 0.
bool m_scaleIsInitial { false };
ViewportArguments m_viewportArguments;
#endif
#if PLATFORM(COCOA)
RetainPtr<id> m_viewState;
#endif
BackForwardItemIdentifier m_identifier;
};
} // namespace WebCore
#if ENABLE(TREE_DEBUGGING)
// Outside the WebCore namespace for ease of invocation from the debugger.
extern "C" int showTree(const WebCore::HistoryItem*);
#endif