/*
 * Copyright (C) 2010-2016 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 INC. AND ITS 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 APPLE INC. OR ITS 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 "APIInjectedBundleEditorClient.h"
#include "APIInjectedBundleFormClient.h"
#include "APIInjectedBundlePageContextMenuClient.h"
#include "APIInjectedBundlePageUIClient.h"
#include "APIObject.h"
#include "Download.h"
#include "EditingRange.h"
#include "FindController.h"
#include "GeolocationPermissionRequestManager.h"
#include "ImageOptions.h"
#include "InjectedBundlePageFullScreenClient.h"
#include "InjectedBundlePageLoaderClient.h"
#include "InjectedBundlePagePolicyClient.h"
#include "InjectedBundlePageResourceLoadClient.h"
#include "LayerTreeContext.h"
#include "MessageReceiver.h"
#include "MessageSender.h"
#include "Plugin.h"
#include "SandboxExtension.h"
#include "ShareableBitmap.h"
#include "UserData.h"
#include "UserMediaPermissionRequestManager.h"
#include <WebCore/ActivityState.h>
#include <WebCore/DictationAlternative.h>
#include <WebCore/DictionaryPopupInfo.h>
#include <WebCore/DragData.h>
#include <WebCore/Editor.h>
#include <WebCore/FrameLoaderTypes.h>
#include <WebCore/HitTestResult.h>
#include <WebCore/HysteresisActivity.h>
#include <WebCore/IntRect.h>
#include <WebCore/IntSizeHash.h>
#include <WebCore/Page.h>
#include <WebCore/PageOverlay.h>
#include <WebCore/PageVisibilityState.h>
#include <WebCore/PlatformMouseEvent.h>
#include <WebCore/ScrollTypes.h>
#include <WebCore/TextChecking.h>
#include <WebCore/TextIndicator.h>
#include <WebCore/UserActivity.h>
#include <WebCore/UserContentTypes.h>
#include <WebCore/UserInterfaceLayoutDirection.h>
#include <WebCore/UserScriptTypes.h>
#include <WebCore/ViewportConfiguration.h>
#include <WebCore/WebCoreKeyboardUIMode.h>
#include <memory>
#include <wtf/HashMap.h>
#include <wtf/MonotonicTime.h>
#include <wtf/RefPtr.h>
#include <wtf/RunLoop.h>
#include <wtf/Seconds.h>
#include <wtf/text/WTFString.h>

#if HAVE(ACCESSIBILITY) && PLATFORM(GTK)
#include "WebPageAccessibilityObject.h"
#include <wtf/glib/GRefPtr.h>
#endif

#if PLATFORM(GTK)
#include "ArgumentCodersGtk.h"
#include "WebPrintOperationGtk.h"
#endif

#if PLATFORM(IOS)
#include "GestureTypes.h"
#import "WebPageMessages.h"
#endif

#if ENABLE(IOS_TOUCH_EVENTS)
#include <WebKitAdditions/PlatformTouchEventIOS.h>
#elif ENABLE(TOUCH_EVENTS)
#include <WebCore/PlatformTouchEvent.h>
#endif

#if ENABLE(MAC_GESTURE_EVENTS)
#include <WebKitAdditions/PlatformGestureEventMac.h>
#endif

#if ENABLE(CONTEXT_MENUS)
#include "InjectedBundlePageContextMenuClient.h"
#endif

#if PLATFORM(COCOA)
#include "ViewGestureGeometryCollector.h"
#include <wtf/RetainPtr.h>
OBJC_CLASS CALayer;
OBJC_CLASS NSArray;
OBJC_CLASS NSDictionary;
OBJC_CLASS NSObject;
OBJC_CLASS WKAccessibilityWebPageObject;
#endif

namespace API {
class Array;
}

namespace IPC {
class Decoder;
class Connection;
}

namespace WebCore {
class DocumentLoader;
class GraphicsContext;
class Frame;
class FrameView;
class HTMLPlugInElement;
class HTMLPlugInImageElement;
class IntPoint;
class KeyboardEvent;
class MediaPlaybackTargetContext;
class Page;
class PrintContext;
class Range;
class ResourceResponse;
class ResourceRequest;
class SharedBuffer;
class SubstituteData;
class TextCheckingRequest;
class URL;
class VisibleSelection;
struct Highlight;
struct KeypressCommand;
struct TextCheckingResult;

#if ENABLE(VIDEO) && USE(GSTREAMER)
class MediaPlayerRequestInstallMissingPluginsCallback;
#endif
}

namespace WebKit {
class DrawingArea;
class InjectedBundleBackForwardList;
class NotificationPermissionRequestManager;
class PDFPlugin;
class PageBanner;
class PluginView;
class RemoteWebInspectorUI;
class VisibleContentRectUpdateInfo;
class WebColorChooser;
class WebContextMenu;
class WebContextMenuItemData;
class WebDocumentLoader;
class WebEvent;
class WebFrame;
class WebFullScreenManager;
class WebImage;
class WebInspector;
class WebInspectorClient;
class WebInspectorUI;
class WebGestureEvent;
class WebKeyboardEvent;
class WebMouseEvent;
class WebNotificationClient;
class WebOpenPanelResultListener;
class WebPageGroupProxy;
class WebPageOverlay;
class WebPlaybackSessionManager;
class WebPopupMenu;
class WebUndoStep;
class WebUserContentController;
class WebVideoFullscreenManager;
class WebWheelEvent;
struct AssistedNodeInformation;
struct AttributedString;
struct BackForwardListItemState;
struct EditingRange;
struct EditorState;
class GamepadData;
struct InteractionInformationAtPosition;
struct InteractionInformationRequest;
struct LoadParameters;
struct PrintInfo;
struct WebsitePolicies;
struct WebPageCreationParameters;
struct WebPreferencesStore;
struct WebSelectionData;

#if PLATFORM(COCOA)
class RemoteLayerTreeTransaction;
#endif

#if ENABLE(TOUCH_EVENTS)
class WebTouchEvent;
#endif

class WebPage : public API::ObjectImpl<API::Object::Type::BundlePage>, public IPC::MessageReceiver, public IPC::MessageSender {
public:
    static Ref<WebPage> create(uint64_t pageID, WebPageCreationParameters&&);
    virtual ~WebPage();

    void reinitializeWebPage(WebPageCreationParameters&&);

    void close();

    static WebPage* fromCorePage(WebCore::Page*);

    WebCore::Page* corePage() const { return m_page.get(); }
    uint64_t pageID() const { return m_pageID; }
    WebCore::SessionID sessionID() const { return m_page->sessionID(); }
    bool usesEphemeralSession() const { return m_page->usesEphemeralSession(); }

    void setSessionID(WebCore::SessionID);

    void setSize(const WebCore::IntSize&);
    const WebCore::IntSize& size() const { return m_viewSize; }
    WebCore::IntRect bounds() const { return WebCore::IntRect(WebCore::IntPoint(), size()); }
    
    InjectedBundleBackForwardList* backForwardList();
    DrawingArea* drawingArea() const { return m_drawingArea.get(); }
#if ENABLE(ASYNC_SCROLLING)
    WebCore::ScrollingCoordinator* scrollingCoordinator() const;
#endif

    WebPageGroupProxy* pageGroup() const { return m_pageGroup.get(); }

    void scrollMainFrameIfNotAtMaxScrollPosition(const WebCore::IntSize& scrollOffset);

    bool scrollBy(uint32_t scrollDirection, uint32_t scrollGranularity);

    void centerSelectionInVisibleArea();

#if PLATFORM(COCOA)
    void willCommitLayerTree(RemoteLayerTreeTransaction&);
    void didFlushLayerTreeAtTime(MonotonicTime);
#endif

    enum class LazyCreationPolicy { UseExistingOnly, CreateIfNeeded };

    WebInspector* inspector(LazyCreationPolicy = LazyCreationPolicy::CreateIfNeeded);
    WebInspectorUI* inspectorUI();
    RemoteWebInspectorUI* remoteInspectorUI();
    bool isInspectorPage() { return !!m_inspectorUI || !!m_remoteInspectorUI; }

#if PLATFORM(IOS) || (PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE))
    WebPlaybackSessionManager& playbackSessionManager();
    WebVideoFullscreenManager& videoFullscreenManager();
#endif
#if PLATFORM(IOS)
    void setAllowsMediaDocumentInlinePlayback(bool);
    bool allowsMediaDocumentInlinePlayback() const { return m_allowsMediaDocumentInlinePlayback; }
#endif

#if ENABLE(FULLSCREEN_API)
    WebFullScreenManager* fullScreenManager();
#endif

    // -- Called by the DrawingArea.
    // FIXME: We could genericize these into a DrawingArea client interface. Would that be beneficial?
    void drawRect(WebCore::GraphicsContext&, const WebCore::IntRect&);
    void layoutIfNeeded();

    // -- Called from WebCore clients.
    bool handleEditingKeyboardEvent(WebCore::KeyboardEvent*);

    void didStartPageTransition();
    void didCompletePageTransition();
    void didCommitLoad(WebFrame*);
    void willReplaceMultipartContent(const WebFrame&);
    void didReplaceMultipartContent(const WebFrame&);
    void didFinishLoad(WebFrame*);
    void show();
    String userAgent(const WebCore::URL&) const;
    String userAgent(WebFrame*, const WebCore::URL&) const;
    String platformUserAgent(const WebCore::URL&) const;
    WebCore::KeyboardUIMode keyboardUIMode();

    const String& overrideContentSecurityPolicy() const { return m_overrideContentSecurityPolicy; }

    WebUndoStep* webUndoStep(uint64_t);
    void addWebUndoStep(uint64_t, WebUndoStep*);
    void removeWebEditCommand(uint64_t);
    bool isInRedo() const { return m_isInRedo; }

    bool isAlwaysOnLoggingAllowed() const;
    void setActivePopupMenu(WebPopupMenu*);

    void setHiddenPageTimerThrottlingIncreaseLimit(std::chrono::milliseconds limit)
    {
        m_page->setTimerAlignmentIntervalIncreaseLimit(limit);
    }

#if ENABLE(INPUT_TYPE_COLOR)
    WebColorChooser* activeColorChooser() const { return m_activeColorChooser; }
    void setActiveColorChooser(WebColorChooser*);
    void didChooseColor(const WebCore::Color&);
    void didEndColorPicker();
#endif

    WebOpenPanelResultListener* activeOpenPanelResultListener() const { return m_activeOpenPanelResultListener.get(); }
    void setActiveOpenPanelResultListener(Ref<WebOpenPanelResultListener>&&);

    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
    void didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder>&) override;

    // -- InjectedBundle methods
#if ENABLE(CONTEXT_MENUS)
    void setInjectedBundleContextMenuClient(std::unique_ptr<API::InjectedBundle::PageContextMenuClient>);
#endif
    void setInjectedBundleEditorClient(std::unique_ptr<API::InjectedBundle::EditorClient>);
    void setInjectedBundleFormClient(std::unique_ptr<API::InjectedBundle::FormClient>);
    void initializeInjectedBundleLoaderClient(WKBundlePageLoaderClientBase*);
    void initializeInjectedBundlePolicyClient(WKBundlePagePolicyClientBase*);
    void initializeInjectedBundleResourceLoadClient(WKBundlePageResourceLoadClientBase*);
    void setInjectedBundleUIClient(std::unique_ptr<API::InjectedBundle::PageUIClient>);
#if ENABLE(FULLSCREEN_API)
    void initializeInjectedBundleFullScreenClient(WKBundlePageFullScreenClientBase*);
#endif

#if ENABLE(CONTEXT_MENUS)
    API::InjectedBundle::PageContextMenuClient& injectedBundleContextMenuClient() { return *m_contextMenuClient.get(); }
#endif
    API::InjectedBundle::EditorClient& injectedBundleEditorClient() { return *m_editorClient.get(); }
    API::InjectedBundle::FormClient& injectedBundleFormClient() { return *m_formClient.get(); }
    InjectedBundlePageLoaderClient& injectedBundleLoaderClient() { return m_loaderClient; }
    InjectedBundlePagePolicyClient& injectedBundlePolicyClient() { return m_policyClient; }
    InjectedBundlePageResourceLoadClient& injectedBundleResourceLoadClient() { return m_resourceLoadClient; }
    API::InjectedBundle::PageUIClient& injectedBundleUIClient() { return *m_uiClient.get(); }
#if ENABLE(FULLSCREEN_API)
    InjectedBundlePageFullScreenClient& injectedBundleFullScreenClient() { return m_fullScreenClient; }
#endif

    bool findStringFromInjectedBundle(const String&, FindOptions);

    WebFrame* mainWebFrame() const { return m_mainFrame.get(); }

    WebCore::MainFrame* mainFrame() const; // May return 0.
    WebCore::FrameView* mainFrameView() const; // May return 0.

    RefPtr<WebCore::Range> currentSelectionAsRange();

#if ENABLE(NETSCAPE_PLUGIN_API)
    RefPtr<Plugin> createPlugin(WebFrame*, WebCore::HTMLPlugInElement*, const Plugin::Parameters&, String& newMIMEType);
#endif

#if ENABLE(WEBGL)
    WebCore::WebGLLoadPolicy webGLPolicyForURL(WebFrame*, const String&);
    WebCore::WebGLLoadPolicy resolveWebGLPolicyForURL(WebFrame*, const String&);
#endif
    
    enum class IncludePostLayoutDataHint { No, Yes };
    EditorState editorState(IncludePostLayoutDataHint = IncludePostLayoutDataHint::Yes) const;
    void sendPostLayoutEditorStateIfNeeded();
    void updateEditorStateAfterLayoutIfEditabilityChanged();

    String renderTreeExternalRepresentation() const;
    String renderTreeExternalRepresentationForPrinting() const;
    uint64_t renderTreeSize() const;

    void setTracksRepaints(bool);
    bool isTrackingRepaints() const;
    void resetTrackedRepaints();
    Ref<API::Array> trackedRepaintRects();

    void executeEditingCommand(const String& commandName, const String& argument);
    bool isEditingCommandEnabled(const String& commandName);
    void clearMainFrameName();
    void sendClose();

    void sendSetWindowFrame(const WebCore::FloatRect&);

    double textZoomFactor() const;
    void setTextZoomFactor(double);
    double pageZoomFactor() const;
    void setPageZoomFactor(double);
    void setPageAndTextZoomFactors(double pageZoomFactor, double textZoomFactor);
    void windowScreenDidChange(uint32_t);

    void accessibilitySettingsDidChange();

    void scalePage(double scale, const WebCore::IntPoint& origin);
    void scalePageInViewCoordinates(double scale, WebCore::IntPoint centerInViewCoordinates);
    double pageScaleFactor() const;
    double totalScaleFactor() const;
    double viewScaleFactor() const;
    void scaleView(double scale);

    void setUseFixedLayout(bool);
    bool useFixedLayout() const { return m_useFixedLayout; }
    bool setFixedLayoutSize(const WebCore::IntSize&);
    WebCore::IntSize fixedLayoutSize() const;

    void listenForLayoutMilestones(uint32_t /* LayoutMilestones */);

    void setSuppressScrollbarAnimations(bool);
    
    void setEnableVerticalRubberBanding(bool);
    void setEnableHorizontalRubberBanding(bool);
    
    void setBackgroundExtendsBeyondPage(bool);

    void setPaginationMode(uint32_t /* WebCore::Pagination::Mode */);
    void setPaginationBehavesLikeColumns(bool);
    void setPageLength(double);
    void setGapBetweenPages(double);
    void setPaginationLineGridEnabled(bool);
    
    void postInjectedBundleMessage(const String& messageName, const UserData&);

    bool drawsBackground() const { return m_drawsBackground; }

    void setUnderlayColor(const WebCore::Color& color) { m_underlayColor = color; }
    WebCore::Color underlayColor() const { return m_underlayColor; }

    void stopLoading();
    void stopLoadingFrame(uint64_t frameID);
    bool defersLoading() const;
    void setDefersLoading(bool deferLoading);

    void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*);
    void exitAcceleratedCompositingMode();

    void addPluginView(PluginView*);
    void removePluginView(PluginView*);

    bool isVisible() const { return m_activityState & WebCore::ActivityState::IsVisible; }
    bool isVisibleOrOccluded() const { return m_activityState & WebCore::ActivityState::IsVisibleOrOccluded; }

    LayerHostingMode layerHostingMode() const { return m_layerHostingMode; }
    void setLayerHostingMode(LayerHostingMode);

#if PLATFORM(COCOA)
    void updatePluginsActiveAndFocusedState();
    const WebCore::FloatRect& windowFrameInScreenCoordinates() const { return m_windowFrameInScreenCoordinates; }
    const WebCore::FloatRect& windowFrameInUnflippedScreenCoordinates() const { return m_windowFrameInUnflippedScreenCoordinates; }
    const WebCore::FloatRect& viewFrameInWindowCoordinates() const { return m_viewFrameInWindowCoordinates; }

    bool hasCachedWindowFrame() const { return m_hasCachedWindowFrame; }

    void updateHeaderAndFooterLayersForDeviceScaleChange(float scaleFactor);
#endif

#if PLATFORM(MAC)
    void setTopOverhangImage(WebImage*);
    void setBottomOverhangImage(WebImage*);
#endif

    bool windowIsFocused() const;
    bool windowAndWebPageAreFocused() const;

#if !PLATFORM(IOS)
    void setHeaderPageBanner(PageBanner*);
    PageBanner* headerPageBanner();
    void setFooterPageBanner(PageBanner*);
    PageBanner* footerPageBanner();

    void hidePageBanners();
    void showPageBanners();
    
    void setHeaderBannerHeightForTesting(int);
    void setFooterBannerHeightForTesting(int);
#endif

    WebCore::IntPoint screenToRootView(const WebCore::IntPoint&);
    WebCore::IntRect rootViewToScreen(const WebCore::IntRect&);
    
#if PLATFORM(IOS)
    WebCore::IntPoint accessibilityScreenToRootView(const WebCore::IntPoint&);
    WebCore::IntRect rootViewToAccessibilityScreen(const WebCore::IntRect&);
#endif
    
    PassRefPtr<WebImage> scaledSnapshotWithOptions(const WebCore::IntRect&, double additionalScaleFactor, SnapshotOptions);
    PassRefPtr<WebImage> snapshotAtSize(const WebCore::IntRect&, const WebCore::IntSize& bitmapSize, SnapshotOptions);
    PassRefPtr<WebImage> snapshotNode(WebCore::Node&, SnapshotOptions, unsigned maximumPixelCount = std::numeric_limits<unsigned>::max());

    static const WebEvent* currentEvent();

    FindController& findController() { return m_findController; }

#if ENABLE(GEOLOCATION)
    GeolocationPermissionRequestManager& geolocationPermissionRequestManager() { return m_geolocationPermissionRequestManager; }
#endif

#if PLATFORM(IOS)
    void savePageState(WebCore::HistoryItem&);
    void restorePageState(const WebCore::HistoryItem&);
#endif

#if ENABLE(MEDIA_STREAM)
    UserMediaPermissionRequestManager& userMediaPermissionRequestManager() { return m_userMediaPermissionRequestManager; }
#endif

    void elementDidFocus(WebCore::Node*);
    void elementDidBlur(WebCore::Node*);
    void resetAssistedNodeForFrame(WebFrame*);

    void viewportPropertiesDidChange(const WebCore::ViewportArguments&);

#if PLATFORM(IOS)
    WebCore::FloatSize screenSize() const;
    WebCore::FloatSize availableScreenSize() const;
    int32_t deviceOrientation() const { return m_deviceOrientation; }
    void didReceiveMobileDocType(bool);

    void setUseTestingViewportConfiguration(bool useTestingViewport) { m_useTestingViewportConfiguration = useTestingViewport; }
    bool isUsingTestingViewportConfiguration() const { return m_useTestingViewportConfiguration; }

    double minimumPageScaleFactor() const;
    double maximumPageScaleFactor() const;
    double maximumPageScaleFactorIgnoringAlwaysScalable() const;
    bool allowsUserScaling() const;
    bool hasStablePageScaleFactor() const { return m_hasStablePageScaleFactor; }

    void handleTap(const WebCore::IntPoint&, uint64_t lastLayerTreeTransactionId);
    void potentialTapAtPosition(uint64_t requestID, const WebCore::FloatPoint&);
    void commitPotentialTap(uint64_t lastLayerTreeTransactionId);
    void commitPotentialTapFailed();
    void cancelPotentialTap();
    void cancelPotentialTapInFrame(WebFrame&);
    void tapHighlightAtPosition(uint64_t requestID, const WebCore::FloatPoint&);

    void inspectorNodeSearchMovedToPosition(const WebCore::FloatPoint&);
    void inspectorNodeSearchEndedAtPosition(const WebCore::FloatPoint&);

    void blurAssistedNode();
    void selectWithGesture(const WebCore::IntPoint&, uint32_t granularity, uint32_t gestureType, uint32_t gestureState, bool isInteractingWithAssistedNode, uint64_t callbackID);
    void updateSelectionWithTouches(const WebCore::IntPoint& point, uint32_t touches, bool baseIsStart, uint64_t callbackID);
    void updateBlockSelectionWithTouch(const WebCore::IntPoint&, uint32_t touch, uint32_t handlePosition);
    void selectWithTwoTouches(const WebCore::IntPoint& from, const WebCore::IntPoint& to, uint32_t gestureType, uint32_t gestureState, uint64_t callbackID);
    void extendSelection(uint32_t granularity);
    void selectWordBackward();
    void moveSelectionByOffset(int32_t offset, uint64_t callbackID);
    void selectTextWithGranularityAtPoint(const WebCore::IntPoint&, uint32_t granularity, bool isInteractingWithAssistedNode, uint64_t callbackID);
    void selectPositionAtBoundaryWithDirection(const WebCore::IntPoint&, uint32_t granularity, uint32_t direction, bool isInteractingWithAssistedNode, uint64_t callbackID);
    void moveSelectionAtBoundaryWithDirection(uint32_t granularity, uint32_t direction, uint64_t callbackID);
    void selectPositionAtPoint(const WebCore::IntPoint&, bool isInteractingWithAssistedNode, uint64_t callbackID);
    void beginSelectionInDirection(uint32_t direction, uint64_t callbackID);
    void updateSelectionWithExtentPoint(const WebCore::IntPoint&, bool isInteractingWithAssistedNode, uint64_t callbackID);
    void updateSelectionWithExtentPointAndBoundary(const WebCore::IntPoint&, uint32_t granularity, bool isInteractingWithAssistedNode, uint64_t callbackID);

    void requestDictationContext(uint64_t callbackID);
    void replaceDictatedText(const String& oldText, const String& newText);
    void replaceSelectedText(const String& oldText, const String& newText);
    void requestAutocorrectionData(const String& textForAutocorrection, uint64_t callbackID);
    void applyAutocorrection(const String& correction, const String& originalText, uint64_t callbackID);
    void syncApplyAutocorrection(const String& correction, const String& originalText, bool& correctionApplied);
    void requestAutocorrectionContext(uint64_t callbackID);
    void getAutocorrectionContext(String& beforeText, String& markedText, String& selectedText, String& afterText, uint64_t& location, uint64_t& length);
    void getPositionInformation(const InteractionInformationRequest&, InteractionInformationAtPosition&);
    void requestPositionInformation(const InteractionInformationRequest&);
    void startInteractionWithElementAtPosition(const WebCore::IntPoint&);
    void stopInteraction();
    void performActionOnElement(uint32_t action);
    void focusNextAssistedNode(bool isForward, uint64_t callbackID);
    void setAssistedNodeValue(const String&);
    void setAssistedNodeValueAsNumber(double);
    void setAssistedNodeSelectedIndex(uint32_t index, bool allowMultipleSelection);
    WebCore::IntRect rectForElementAtInteractionLocation();
    void updateSelectionAppearance();
    void getSelectionContext(uint64_t callbackID);
    void handleTwoFingerTapAtPoint(const WebCore::IntPoint&, uint64_t requestID);
    void getRectsForGranularityWithSelectionOffset(uint32_t, int32_t, uint64_t callbackID);
    void getRectsAtSelectionOffsetWithText(int32_t, const String&, uint64_t callbackID);
#if ENABLE(IOS_TOUCH_EVENTS)
    void dispatchAsynchronousTouchEvents(const Vector<WebTouchEvent, 1>& queue);
#endif

    void contentSizeCategoryDidChange(const String&);
    void executeEditCommandWithCallback(const String&, uint64_t callbackID);

    Seconds eventThrottlingDelay() const;

    void showInspectorHighlight(const WebCore::Highlight&);
    void hideInspectorHighlight();

    void showInspectorIndication();
    void hideInspectorIndication();

    void enableInspectorNodeSearch();
    void disableInspectorNodeSearch();
    
    void setForceAlwaysUserScalable(bool);
#endif

    void setLayerTreeStateIsFrozen(bool);
    void markLayersVolatile(std::function<void ()> completionHandler = { });
    void cancelMarkLayersVolatile();

    NotificationPermissionRequestManager* notificationPermissionRequestManager();

    void pageDidScroll();
#if USE(COORDINATED_GRAPHICS)
    void pageDidRequestScroll(const WebCore::IntPoint&);
#endif

#if ENABLE(CONTEXT_MENUS)
    WebContextMenu* contextMenu();
    WebContextMenu* contextMenuAtPointInWindow(const WebCore::IntPoint&);
#endif
    
    bool hasLocalDataForURL(const WebCore::URL&);
    String cachedResponseMIMETypeForURL(const WebCore::URL&);
    String cachedSuggestedFilenameForURL(const WebCore::URL&);
    RefPtr<WebCore::SharedBuffer> cachedResponseDataForURL(const WebCore::URL&);

    static bool canHandleRequest(const WebCore::ResourceRequest&);

    class SandboxExtensionTracker {
    public:
        ~SandboxExtensionTracker();

        void invalidate();

        void beginLoad(WebFrame*, const SandboxExtension::Handle& handle);
        void willPerformLoadDragDestinationAction(PassRefPtr<SandboxExtension> pendingDropSandboxExtension);
        void didStartProvisionalLoad(WebFrame*);
        void didCommitProvisionalLoad(WebFrame*);
        void didFailProvisionalLoad(WebFrame*);

    private:
        void setPendingProvisionalSandboxExtension(PassRefPtr<SandboxExtension>);

        RefPtr<SandboxExtension> m_pendingProvisionalSandboxExtension;
        RefPtr<SandboxExtension> m_provisionalSandboxExtension;
        RefPtr<SandboxExtension> m_committedSandboxExtension;
    };

    SandboxExtensionTracker& sandboxExtensionTracker() { return m_sandboxExtensionTracker; }

#if PLATFORM(GTK)
    void setComposition(const String& text, const Vector<WebCore::CompositionUnderline>& underlines, uint64_t selectionStart, uint64_t selectionEnd, uint64_t replacementRangeStart, uint64_t replacementRangeLength);
    void confirmComposition(const String& text, int64_t selectionStart, int64_t selectionLength);
    void cancelComposition();

    void collapseSelectionInFrame(uint64_t frameID);
#endif

#if PLATFORM (GTK) && HAVE(GTK_GESTURES)
    void getCenterForZoomGesture(const WebCore::IntPoint& centerInViewCoordinates, WebCore::IntPoint& result);
#endif

    void didApplyStyle();
    void didChangeSelection();
    void discardedComposition();
    void canceledComposition();

#if PLATFORM(COCOA)
    void registerUIProcessAccessibilityTokens(const IPC::DataReference& elemenToken, const IPC::DataReference& windowToken);
    WKAccessibilityWebPageObject* accessibilityRemoteObject();
    NSObject *accessibilityObjectForMainFramePlugin();
    const WebCore::FloatPoint& accessibilityPosition() const { return m_accessibilityPosition; }
    
    void sendComplexTextInputToPlugin(uint64_t pluginComplexTextInputIdentifier, const String& textInput);

    void insertTextAsync(const String& text, const EditingRange& replacementRange, bool registerUndoGroup = false, uint32_t editingRangeIsRelativeTo = (uint32_t)EditingRangeIsRelativeTo::EditableRoot, bool suppressSelectionUpdate = false);
    void getMarkedRangeAsync(uint64_t callbackID);
    void getSelectedRangeAsync(uint64_t callbackID);
    void characterIndexForPointAsync(const WebCore::IntPoint&, uint64_t callbackID);
    void firstRectForCharacterRangeAsync(const EditingRange&, uint64_t callbackID);
    void setCompositionAsync(const String& text, Vector<WebCore::CompositionUnderline> underlines, const EditingRange& selectionRange, const EditingRange& replacementRange);
    void confirmCompositionAsync();

#if PLATFORM(MAC)
    void insertDictatedTextAsync(const String& text, const EditingRange& replacementRange, const Vector<WebCore::DictationAlternative>& dictationAlternativeLocations, bool registerUndoGroup = false);
    void attributedSubstringForCharacterRangeAsync(const EditingRange&, uint64_t callbackID);
    void fontAtSelection(uint64_t callbackID);
#endif

    void readSelectionFromPasteboard(const WTF::String& pasteboardName, bool& result);
    void getStringSelectionForPasteboard(WTF::String& stringValue);
    void getDataSelectionForPasteboard(const WTF::String pasteboardType, SharedMemory::Handle& handle, uint64_t& size);
    void shouldDelayWindowOrderingEvent(const WebKit::WebMouseEvent&, bool& result);
    void acceptsFirstMouse(int eventNumber, const WebKit::WebMouseEvent&, bool& result);
    bool performNonEditingBehaviorForSelector(const String&, WebCore::KeyboardEvent*);

#if ENABLE(SERVICE_CONTROLS)
    void replaceSelectionWithPasteboardData(const Vector<String>& types, const IPC::DataReference&);
#endif
#endif

#if HAVE(ACCESSIBILITY) && PLATFORM(GTK)
    void updateAccessibilityTree();
#endif

    void setCompositionForTesting(const String& compositionString, uint64_t from, uint64_t length);
    bool hasCompositionForTesting();
    void confirmCompositionForTesting(const String& compositionString);

    // FIXME: This a dummy message, to avoid breaking the build for platforms that don't require
    // any synchronous messages, and should be removed when <rdar://problem/8775115> is fixed.
    void dummy(bool&);

#if PLATFORM(COCOA)
    bool isSpeaking();
    void speak(const String&);
    void stopSpeaking();

    void performDictionaryLookupForSelection(WebCore::Frame*, const WebCore::VisibleSelection&, WebCore::TextIndicatorPresentationTransition);
#endif

    bool isSmartInsertDeleteEnabled();
    void setSmartInsertDeleteEnabled(bool);

    bool isSelectTrailingWhitespaceEnabled();
    void setSelectTrailingWhitespaceEnabled(bool);

    void replaceSelectionWithText(WebCore::Frame*, const String&);
    void clearSelection();
    void restoreSelectionInFocusedEditableElement();

#if ENABLE(DRAG_SUPPORT)
#if PLATFORM(GTK)
    void performDragControllerAction(uint64_t action, const WebCore::IntPoint& clientPosition, const WebCore::IntPoint& globalPosition, uint64_t draggingSourceOperationMask, WebSelectionData&&, uint32_t flags);
#else
    void performDragControllerAction(uint64_t action, const WebCore::DragData&, const SandboxExtension::Handle&, const SandboxExtension::HandleArray&);
#endif
    void dragEnded(WebCore::IntPoint clientPosition, WebCore::IntPoint globalPosition, uint64_t operation);

    void willPerformLoadDragDestinationAction();
    void mayPerformUploadDragDestinationAction();

    void willStartDrag() { ASSERT(!m_isStartingDrag); m_isStartingDrag = true; }
    void didStartDrag() { ASSERT(m_isStartingDrag); m_isStartingDrag = false; }
    void dragCancelled() { m_isStartingDrag = false; }
#endif // ENABLE(DRAG_SUPPORT)

    void beginPrinting(uint64_t frameID, const PrintInfo&);
    void endPrinting();
    void computePagesForPrinting(uint64_t frameID, const PrintInfo&, uint64_t callbackID);
    void computePagesForPrintingImpl(uint64_t frameID, const PrintInfo&, Vector<WebCore::IntRect>& pageRects, double& totalScaleFactor);
#if PLATFORM(COCOA)
    void drawRectToImage(uint64_t frameID, const PrintInfo&, const WebCore::IntRect&, const WebCore::IntSize&, uint64_t callbackID);
    void drawPagesToPDF(uint64_t frameID, const PrintInfo&, uint32_t first, uint32_t count, uint64_t callbackID);
    void drawPagesToPDFImpl(uint64_t frameID, const PrintInfo&, uint32_t first, uint32_t count, RetainPtr<CFMutableDataRef>& pdfPageData);
#if PLATFORM(IOS)
    void computePagesForPrintingAndDrawToPDF(uint64_t frameID, const PrintInfo&, uint64_t callbackID, PassRefPtr<Messages::WebPage::ComputePagesForPrintingAndDrawToPDF::DelayedReply>);
#endif
#elif PLATFORM(GTK)
    void drawPagesForPrinting(uint64_t frameID, const PrintInfo&, uint64_t callbackID);
    void didFinishPrintOperation(const WebCore::ResourceError&, uint64_t callbackID);
#endif

    void addResourceRequest(unsigned long, const WebCore::ResourceRequest&);
    void removeResourceRequest(unsigned long);

    void setMediaVolume(float);
    void setMuted(WebCore::MediaProducer::MutedStateFlags);
    void setMayStartMediaWhenInWindow(bool);

#if ENABLE(MEDIA_SESSION)
    void handleMediaEvent(uint32_t /* WebCore::MediaEventType */);
    void setVolumeOfMediaElement(double, uint64_t);
#endif

    void updateMainFrameScrollOffsetPinning();

    bool mainFrameHasCustomContentProvider() const;
    void addMIMETypeWithCustomContentProvider(const String&);

    void mainFrameDidLayout();

    bool canRunBeforeUnloadConfirmPanel() const { return m_canRunBeforeUnloadConfirmPanel; }
    void setCanRunBeforeUnloadConfirmPanel(bool canRunBeforeUnloadConfirmPanel) { m_canRunBeforeUnloadConfirmPanel = canRunBeforeUnloadConfirmPanel; }

    bool canRunModal() const { return m_canRunModal; }
    void setCanRunModal(bool canRunModal) { m_canRunModal = canRunModal; }

    void runModal();

    void setDeviceScaleFactor(float);
    float deviceScaleFactor() const;

    void forceRepaintWithoutCallback();

    void unmarkAllMisspellings();
    void unmarkAllBadGrammar();
#if PLATFORM(COCOA)
    void handleAlternativeTextUIResult(const String&);
#endif

    // For testing purpose.
    void simulateMouseDown(int button, WebCore::IntPoint, int clickCount, WKEventModifiers, double time);
    void simulateMouseUp(int button, WebCore::IntPoint, int clickCount, WKEventModifiers, double time);
    void simulateMouseMotion(WebCore::IntPoint, double time);

#if ENABLE(CONTEXT_MENUS)
    void contextMenuShowing() { m_isShowingContextMenu = true; }
#endif

    void wheelEvent(const WebWheelEvent&);

    void wheelEventHandlersChanged(bool);
    void recomputeShortCircuitHorizontalWheelEventsState();

#if ENABLE(MAC_GESTURE_EVENTS)
    void gestureEvent(const WebGestureEvent&);
#endif

    void updateVisibilityState(bool isInitialState = false);

#if PLATFORM(IOS)
    void setViewportConfigurationMinimumLayoutSize(const WebCore::FloatSize&);
    void setMaximumUnobscuredSize(const WebCore::FloatSize&);
    void setDeviceOrientation(int32_t);
    void dynamicViewportSizeUpdate(const WebCore::FloatSize& minimumLayoutSize, const WebCore::FloatSize& maximumUnobscuredSize, const WebCore::FloatRect& targetExposedContentRect, const WebCore::FloatRect& targetUnobscuredRect, const WebCore::FloatRect& targetUnobscuredRectInScrollViewCoordinates, double scale, int32_t deviceOrientation, uint64_t dynamicViewportSizeUpdateID);
    void synchronizeDynamicViewportUpdate(double& newTargetScale, WebCore::FloatPoint& newScrollPosition, uint64_t& nextValidLayerTreeTransactionID);
    void updateVisibleContentRects(const VisibleContentRectUpdateInfo&, MonotonicTime oldestTimestamp);
    bool scaleWasSetByUIProcess() const { return m_scaleWasSetByUIProcess; }
    void willStartUserTriggeredZooming();
    void applicationWillResignActive();
    void applicationDidEnterBackground(bool isSuspendedUnderLock);
    void applicationDidFinishSnapshottingAfterEnteringBackground();
    void applicationWillEnterForeground(bool isSuspendedUnderLock);
    void applicationDidBecomeActive();
    void zoomToRect(WebCore::FloatRect, double minimumScale, double maximumScale);
    void completePendingSyntheticClickForContentChangeObserver();
#endif

#if ENABLE(IOS_TOUCH_EVENTS)
    void dispatchTouchEvent(const WebTouchEvent&, bool& handled);
#endif

#if PLATFORM(GTK) && USE(TEXTURE_MAPPER_GL)
    uint64_t nativeWindowHandle() { return m_nativeWindowHandle; }
#endif

    bool shouldUseCustomContentProviderForResponse(const WebCore::ResourceResponse&);

    bool asynchronousPluginInitializationEnabled() const { return m_asynchronousPluginInitializationEnabled; }
    void setAsynchronousPluginInitializationEnabled(bool enabled) { m_asynchronousPluginInitializationEnabled = enabled; }
    bool asynchronousPluginInitializationEnabledForAllPlugins() const { return m_asynchronousPluginInitializationEnabledForAllPlugins; }
    void setAsynchronousPluginInitializationEnabledForAllPlugins(bool enabled) { m_asynchronousPluginInitializationEnabledForAllPlugins = enabled; }
    bool artificialPluginInitializationDelayEnabled() const { return m_artificialPluginInitializationDelayEnabled; }
    void setArtificialPluginInitializationDelayEnabled(bool enabled) { m_artificialPluginInitializationDelayEnabled = enabled; }
    void setTabToLinksEnabled(bool enabled) { m_tabToLinks = enabled; }
    bool tabToLinksEnabled() const { return m_tabToLinks; }

    bool scrollingPerformanceLoggingEnabled() const { return m_scrollingPerformanceLoggingEnabled; }
    void setScrollingPerformanceLoggingEnabled(bool);

#if PLATFORM(COCOA)
    bool shouldUsePDFPlugin() const;
    bool pdfPluginEnabled() const { return m_pdfPluginEnabled; }
    void setPDFPluginEnabled(bool enabled) { m_pdfPluginEnabled = enabled; }

    NSDictionary *dataDetectionContext() const { return m_dataDetectionContext.get(); }
#endif

    void savePDFToFileInDownloadsFolder(const String& suggestedFilename, const String& originatingURLString, const uint8_t* data, unsigned long size);
#if PLATFORM(COCOA)
    void savePDFToTemporaryFolderAndOpenWithNativeApplication(const String& suggestedFilename, const String& originatingURLString, const uint8_t* data, unsigned long size, const String& pdfUUID);
#endif

    bool mainFrameIsScrollable() const { return m_mainFrameIsScrollable; }

    void setMinimumLayoutSize(const WebCore::IntSize&);
    WebCore::IntSize minimumLayoutSize() const { return m_minimumLayoutSize; }

    void setAutoSizingShouldExpandToViewHeight(bool shouldExpand);
    bool autoSizingShouldExpandToViewHeight() { return m_autoSizingShouldExpandToViewHeight; }

    bool canShowMIMEType(const String& MIMEType) const;

    void addTextCheckingRequest(uint64_t requestID, PassRefPtr<WebCore::TextCheckingRequest>);
    void didFinishCheckingText(uint64_t requestID, const Vector<WebCore::TextCheckingResult>&);
    void didCancelCheckingText(uint64_t requestID);

#if ENABLE(PRIMARY_SNAPSHOTTED_PLUGIN_HEURISTIC)
    void determinePrimarySnapshottedPlugIn();
    void determinePrimarySnapshottedPlugInTimerFired();
    void resetPrimarySnapshottedPlugIn();
    bool matchesPrimaryPlugIn(const String& pageOrigin, const String& pluginOrigin, const String& mimeType) const;
    bool plugInIntersectsSearchRect(WebCore::HTMLPlugInImageElement& pluginImageElement);
    bool plugInIsPrimarySize(WebCore::HTMLPlugInImageElement& pluginImageElement, unsigned &pluginArea);
#endif

#if ENABLE(DATA_DETECTION)
    void setDataDetectionResults(NSArray *);
#endif

    unsigned extendIncrementalRenderingSuppression();
    void stopExtendingIncrementalRenderingSuppression(unsigned token);
    bool shouldExtendIncrementalRenderingSuppression() { return !m_activeRenderingSuppressionTokens.isEmpty(); }

    WebCore::ScrollPinningBehavior scrollPinningBehavior() { return m_scrollPinningBehavior; }
    void setScrollPinningBehavior(uint32_t /* WebCore::ScrollPinningBehavior */ pinning);

    std::optional<WebCore::ScrollbarOverlayStyle> scrollbarOverlayStyle() { return m_scrollbarOverlayStyle; }
    void setScrollbarOverlayStyle(std::optional<uint32_t /* WebCore::ScrollbarOverlayStyle */> scrollbarStyle);

    Ref<WebCore::DocumentLoader> createDocumentLoader(WebCore::Frame&, const WebCore::ResourceRequest&, const WebCore::SubstituteData&);
    void updateCachedDocumentLoader(WebDocumentLoader&, WebCore::Frame&);

    void getBytecodeProfile(uint64_t callbackID);
    void getSamplingProfilerOutput(uint64_t callbackID);
    
#if ENABLE(SERVICE_CONTROLS) || ENABLE(TELEPHONE_NUMBER_DETECTION)
    void handleTelephoneNumberClick(const String& number, const WebCore::IntPoint&);
    void handleSelectionServiceClick(WebCore::FrameSelection&, const Vector<String>& telephoneNumbers, const WebCore::IntPoint&);
#endif

    void didChangeScrollOffsetForFrame(WebCore::Frame*);

    void setMainFrameProgressCompleted(bool completed) { m_mainFrameProgressCompleted = completed; }
    bool shouldDispatchFakeMouseMoveEvents() const { return m_shouldDispatchFakeMouseMoveEvents; }

    void postMessage(const String& messageName, API::Object* messageBody);
    void postSynchronousMessageForTesting(const String& messageName, API::Object* messageBody, RefPtr<API::Object>& returnData);

#if PLATFORM(GTK)
    void setInputMethodState(bool);
#endif

    void imageOrMediaDocumentSizeChanged(const WebCore::IntSize&);
#if ENABLE(VIDEO)
#if USE(GSTREAMER)
    void requestInstallMissingMediaPlugins(const String& details, const String& description, WebCore::MediaPlayerRequestInstallMissingPluginsCallback&);
#endif
#endif

    void addUserScript(const String& source, WebCore::UserContentInjectedFrames, WebCore::UserScriptInjectionTime);
    void addUserStyleSheet(const String& source, WebCore::UserContentInjectedFrames);
    void removeAllUserContent();

    void dispatchDidReachLayoutMilestone(WebCore::LayoutMilestones);

    void didRestoreScrollPosition();

    bool isControlledByAutomation() const;
    void setControlledByAutomation(bool);

    void insertNewlineInQuotedContent();

#if USE(OS_STATE)
    std::chrono::system_clock::time_point loadCommitTime() const { return m_loadCommitTime; }
#endif

#if ENABLE(GAMEPAD)
    void gamepadActivity(const Vector<GamepadData>&, bool shouldMakeGamepadsVisible);
#endif
    
#if ENABLE(POINTER_LOCK)
    void didAcquirePointerLock();
    void didNotAcquirePointerLock();
    void didLosePointerLock();
#endif

    void didGetLoadDecisionForIcon(bool decision, uint64_t loadIdentifier, uint64_t newCallbackID);
    void setUseIconLoadingClient(bool);

private:
    WebPage(uint64_t pageID, WebPageCreationParameters&&);

    void updateThrottleState();
    void updateUserActivity();

    // IPC::MessageSender
    IPC::Connection* messageSenderConnection() override;
    uint64_t messageSenderDestinationID() override;

    void platformInitialize();
    void platformDetach();
    void platformEditorState(WebCore::Frame&, EditorState& result, IncludePostLayoutDataHint) const;

    void didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&);
    void didReceiveSyncWebPageMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder>&);

#if PLATFORM(IOS)
    void resetViewportDefaultConfiguration(WebFrame* mainFrame);
    void viewportConfigurationChanged();
    void updateViewportSizeForCSSViewportUnits();

    static void convertSelectionRectsToRootView(WebCore::FrameView*, Vector<WebCore::SelectionRect>&);
    PassRefPtr<WebCore::Range> rangeForWebSelectionAtPosition(const WebCore::IntPoint&, const WebCore::VisiblePosition&, SelectionFlags&);
    PassRefPtr<WebCore::Range> rangeForBlockAtPoint(const WebCore::IntPoint&);
    void computeExpandAndShrinkThresholdsForHandle(const WebCore::IntPoint&, SelectionHandlePosition, float& growThreshold, float& shrinkThreshold);
    PassRefPtr<WebCore::Range> changeBlockSelection(const WebCore::IntPoint&, SelectionHandlePosition, float& growThreshold, float& shrinkThreshold, SelectionFlags&);
    PassRefPtr<WebCore::Range> expandedRangeFromHandle(WebCore::Range*, SelectionHandlePosition);
    PassRefPtr<WebCore::Range> contractedRangeFromHandle(WebCore::Range* currentRange, SelectionHandlePosition, SelectionFlags&);
    void getAssistedNodeInformation(AssistedNodeInformation&);
    void platformInitializeAccessibility();
    void handleSyntheticClick(WebCore::Node* nodeRespondingToClick, const WebCore::FloatPoint& location);
    void completeSyntheticClick(WebCore::Node* nodeRespondingToClick, const WebCore::FloatPoint& location, WebCore::SyntheticClickType);
    void sendTapHighlightForNodeIfNecessary(uint64_t requestID, WebCore::Node*);
    void resetTextAutosizing();
    WebCore::VisiblePosition visiblePositionInFocusedNodeForPoint(const WebCore::Frame&, const WebCore::IntPoint&, bool isInteractingWithAssistedNode);
    PassRefPtr<WebCore::Range> rangeForGranularityAtPoint(const WebCore::Frame&, const WebCore::IntPoint&, uint32_t granularity, bool isInteractingWithAssistedNode);
    bool shouldSwitchToBlockModeForHandle(const WebCore::IntPoint& handlePoint, SelectionHandlePosition);
    RefPtr<WebCore::Range> switchToBlockSelectionAtPoint(const WebCore::IntPoint&, SelectionHandlePosition);
#if ENABLE(DATA_INTERACTION)
    void requestStartDataInteraction(const WebCore::IntPoint& clientPosition, const WebCore::IntPoint& globalPosition);
#endif
#endif

#if !PLATFORM(COCOA)
    static const char* interpretKeyEvent(const WebCore::KeyboardEvent*);
#endif

    bool performDefaultBehaviorForKeyEvent(const WebKeyboardEvent&);

#if PLATFORM(MAC)
    bool executeKeypressCommandsInternal(const Vector<WebCore::KeypressCommand>&, WebCore::KeyboardEvent*);
#endif

    bool markLayersVolatileImmediatelyIfPossible();
    void layerVolatilityTimerFired();
    void callVolatilityCompletionHandlers();

    String sourceForFrame(WebFrame*);

    void loadDataImpl(uint64_t navigationID, PassRefPtr<WebCore::SharedBuffer>, const String& MIMEType, const String& encodingName, const WebCore::URL& baseURL, const WebCore::URL& failingURL, const UserData&);
    void loadStringImpl(uint64_t navigationID, const String&, const String& MIMEType, const WebCore::URL& baseURL, const WebCore::URL& failingURL, const UserData&);

    bool platformHasLocalDataForURL(const WebCore::URL&);

    // Actions
    void tryClose();
    void platformDidReceiveLoadParameters(const LoadParameters&);
    void loadRequest(const LoadParameters&);
    void loadData(const LoadParameters&);
    void loadString(const LoadParameters&);
    void loadAlternateHTMLString(const LoadParameters&);
    void navigateToPDFLinkWithSimulatedClick(const String& url, WebCore::IntPoint documentPoint, WebCore::IntPoint screenPoint);
    void reload(uint64_t navigationID, bool reloadFromOrigin, bool contentBlockersEnabled, const SandboxExtension::Handle&);
    void goForward(uint64_t navigationID, uint64_t);
    void goBack(uint64_t navigationID, uint64_t);
    void goToBackForwardItem(uint64_t navigationID, uint64_t);
    void tryRestoreScrollPosition();
    void setInitialFocus(bool forward, bool isKeyboardEventValid, const WebKeyboardEvent&, uint64_t callbackID);
    void updateIsInWindow(bool isInitialState = false);
    void setActivityState(WebCore::ActivityState::Flags, bool wantsDidUpdateActivityState, const Vector<uint64_t>& callbackIDs);
    void validateCommand(const String&, uint64_t);
    void executeEditCommand(const String&, const String&);
    void setEditable(bool);

    void mouseEvent(const WebMouseEvent&);
    void keyEvent(const WebKeyboardEvent&);
#if ENABLE(IOS_TOUCH_EVENTS)
    void touchEventSync(const WebTouchEvent&, bool& handled);
#elif ENABLE(TOUCH_EVENTS)
    void touchEvent(const WebTouchEvent&);
#endif
#if ENABLE(CONTEXT_MENUS)
    void contextMenuHidden() { m_isShowingContextMenu = false; }
    void contextMenuForKeyEvent();
#endif

    static bool scroll(WebCore::Page*, WebCore::ScrollDirection, WebCore::ScrollGranularity);
    static bool logicalScroll(WebCore::Page*, WebCore::ScrollLogicalDirection, WebCore::ScrollGranularity);

    void loadURLInFrame(const String&, uint64_t frameID);

    enum class WasRestoredByAPIRequest { No, Yes };
    void restoreSessionInternal(const Vector<BackForwardListItemState>&, WasRestoredByAPIRequest);
    void restoreSession(const Vector<BackForwardListItemState>&);
    void didRemoveBackForwardItem(uint64_t);

#if ENABLE(REMOTE_INSPECTOR)
    void setAllowsRemoteInspection(bool);
    void setRemoteInspectionNameOverride(const String&);
#endif

    void setDrawsBackground(bool);

#if HAVE(COREANIMATION_FENCES)
    void setTopContentInsetFenced(float, IPC::Attachment);
#endif
    void setTopContentInset(float);

    void viewWillStartLiveResize();
    void viewWillEndLiveResize();

    void getContentsAsString(uint64_t callbackID);
#if ENABLE(MHTML)
    void getContentsAsMHTMLData(uint64_t callbackID);
#endif
    void getMainResourceDataOfFrame(uint64_t frameID, uint64_t callbackID);
    void getResourceDataFromFrame(uint64_t frameID, const String& resourceURL, uint64_t callbackID);
    void getRenderTreeExternalRepresentation(uint64_t callbackID);
    void getSelectionOrContentsAsString(uint64_t callbackID);
    void getSelectionAsWebArchiveData(uint64_t callbackID);
    void getSourceForFrame(uint64_t frameID, uint64_t callbackID);
    void getWebArchiveOfFrame(uint64_t frameID, uint64_t callbackID);
    void runJavaScriptInMainFrame(const String&, uint64_t callbackID);
    void forceRepaint(uint64_t callbackID);
    void takeSnapshot(WebCore::IntRect snapshotRect, WebCore::IntSize bitmapSize, uint32_t options, uint64_t callbackID);

    void preferencesDidChange(const WebPreferencesStore&);
    void platformPreferencesDidChange(const WebPreferencesStore&);
    void updatePreferences(const WebPreferencesStore&);

    void didReceivePolicyDecision(uint64_t frameID, uint64_t listenerID, uint32_t policyAction, uint64_t navigationID, DownloadID);
    void setUserAgent(const String&);
    void setCustomTextEncodingName(const String&);
    void suspendActiveDOMObjectsAndAnimations();
    void resumeActiveDOMObjectsAndAnimations();

#if PLATFORM(COCOA)
    void performDictionaryLookupAtLocation(const WebCore::FloatPoint&);
    void performDictionaryLookupOfCurrentSelection();
    void performDictionaryLookupForRange(WebCore::Frame*, WebCore::Range&, NSDictionary *options, WebCore::TextIndicatorPresentationTransition);
    WebCore::DictionaryPopupInfo dictionaryPopupInfoForRange(WebCore::Frame*, WebCore::Range&, NSDictionary **options, WebCore::TextIndicatorPresentationTransition);
#if ENABLE(PDFKIT_PLUGIN)
    WebCore::DictionaryPopupInfo dictionaryPopupInfoForSelectionInPDFPlugin(PDFSelection *, PDFPlugin&, NSDictionary **options, WebCore::TextIndicatorPresentationTransition);
#endif

    void windowAndViewFramesChanged(const WebCore::FloatRect& windowFrameInScreenCoordinates, const WebCore::FloatRect& windowFrameInUnflippedScreenCoordinates, const WebCore::FloatRect& viewFrameInWindowCoordinates, const WebCore::FloatPoint& accessibilityViewCoordinates);

    RetainPtr<PDFDocument> pdfDocumentForPrintingFrame(WebCore::Frame*);
    void computePagesForPrintingPDFDocument(uint64_t frameID, const PrintInfo&, Vector<WebCore::IntRect>& resultPageRects);
    void drawPDFDocument(CGContextRef, PDFDocument *, const PrintInfo&, const WebCore::IntRect&);
    void drawPagesToPDFFromPDFDocument(CGContextRef, PDFDocument *, const PrintInfo&, uint32_t first, uint32_t count);
#endif

    void setMainFrameIsScrollable(bool);

    void unapplyEditCommand(uint64_t commandID);
    void reapplyEditCommand(uint64_t commandID);
    void didRemoveEditCommand(uint64_t commandID);

    void findString(const String&, uint32_t findOptions, uint32_t maxMatchCount);
    void findStringMatches(const String&, uint32_t findOptions, uint32_t maxMatchCount);
    void getImageForFindMatch(uint32_t matchIndex);
    void selectFindMatch(uint32_t matchIndex);
    void hideFindUI();
    void countStringMatches(const String&, uint32_t findOptions, uint32_t maxMatchCount);

#if USE(COORDINATED_GRAPHICS)
    void sendViewportAttributesChanged(const WebCore::ViewportArguments&);
#endif

    void didChangeSelectedIndexForActivePopupMenu(int32_t newIndex);
    void setTextForActivePopupMenu(int32_t index);

#if PLATFORM(GTK)
    void failedToShowPopupMenu();
#endif

#if PLATFORM(IOS)
    void didChooseFilesForOpenPanelWithDisplayStringAndIcon(const Vector<String>&, const String& displayString, const IPC::DataReference& iconData);
#endif
    void didChooseFilesForOpenPanel(const Vector<String>&);
    void didCancelForOpenPanel();
#if ENABLE(SANDBOX_EXTENSIONS)
    void extendSandboxForFileFromOpenPanel(const SandboxExtension::Handle&);
#endif

    void didReceiveGeolocationPermissionDecision(uint64_t geolocationID, bool allowed);

    void didReceiveNotificationPermissionDecision(uint64_t notificationID, bool allowed);

#if ENABLE(MEDIA_STREAM)
    void userMediaAccessWasGranted(uint64_t userMediaID, const String& audioDeviceUID, const String& videoDeviceUID);
    void userMediaAccessWasDenied(uint64_t userMediaID, uint64_t reason, String invalidConstraint);

    void didCompleteMediaDeviceEnumeration(uint64_t userMediaID, const Vector<WebCore::CaptureDevice>& devices, const String& deviceIdentifierHashSalt, bool originHasPersistentAccess);
#if ENABLE(SANDBOX_EXTENSIONS)
    void grantUserMediaDeviceSandboxExtensions(const MediaDeviceSandboxExtensions&);
    void revokeUserMediaDeviceSandboxExtensions(const Vector<String>&);
#endif
#endif

    void advanceToNextMisspelling(bool startBeforeSelection);
    void changeSpellingToWord(const String& word);
#if USE(APPKIT)
    void uppercaseWord();
    void lowercaseWord();
    void capitalizeWord();
#endif

#if ENABLE(CONTEXT_MENUS)
    void didSelectItemFromActiveContextMenu(const WebContextMenuItemData&);
#endif

    void changeSelectedIndex(int32_t index);
    void setCanStartMediaTimerFired();

    static bool platformCanHandleRequest(const WebCore::ResourceRequest&);

    static PluginView* focusedPluginViewForFrame(WebCore::Frame&);
    static PluginView* pluginViewForFrame(WebCore::Frame*);

    static RefPtr<WebCore::Range> rangeFromEditingRange(WebCore::Frame&, const EditingRange&, EditingRangeIsRelativeTo = EditingRangeIsRelativeTo::EditableRoot);

    void reportUsedFeatures();

    void updateWebsitePolicies(const WebsitePolicies&);

#if PLATFORM(MAC)
    void performImmediateActionHitTestAtLocation(WebCore::FloatPoint);
    RefPtr<WebCore::Range> lookupTextAtLocation(WebCore::FloatPoint, NSDictionary **options);
    void immediateActionDidUpdate();
    void immediateActionDidCancel();
    void immediateActionDidComplete();
    void setFont(const String& fontFamily, double fontSize, uint64_t fontTraits);

    void dataDetectorsDidPresentUI(WebCore::PageOverlay::PageOverlayID);
    void dataDetectorsDidChangeUI(WebCore::PageOverlay::PageOverlayID);
    void dataDetectorsDidHideUI(WebCore::PageOverlay::PageOverlayID);

    void handleAcceptedCandidate(WebCore::TextCheckingResult);
#endif

#if PLATFORM(COCOA)
    void requestActiveNowPlayingSessionInfo();
#endif

    void setShouldDispatchFakeMouseMoveEvents(bool dispatch) { m_shouldDispatchFakeMouseMoveEvents = dispatch; }

#if ENABLE(WIRELESS_PLAYBACK_TARGET) && !PLATFORM(IOS)
    void playbackTargetSelected(uint64_t, const WebCore::MediaPlaybackTargetContext& outputDevice) const;
    void playbackTargetAvailabilityDidChange(uint64_t, bool);
    void setShouldPlayToPlaybackTarget(uint64_t, bool);
#endif

    void clearWheelEventTestTrigger();

    void setShouldScaleViewToFitDocument(bool);

    void pageStoppedScrolling();

#if ENABLE(VIDEO) && USE(GSTREAMER)
    void didEndRequestInstallMissingMediaPlugins(uint32_t result);
#endif

    void setResourceCachingDisabled(bool);
    void setUserInterfaceLayoutDirection(uint32_t);

    bool canPluginHandleResponse(const WebCore::ResourceResponse&);

#if USE(QUICK_LOOK)
    void didReceivePasswordForQuickLookDocument(const String&);
#endif

    uint64_t m_pageID;

    std::unique_ptr<WebCore::Page> m_page;
    RefPtr<WebFrame> m_mainFrame;
    RefPtr<InjectedBundleBackForwardList> m_backForwardList;

    RefPtr<WebPageGroupProxy> m_pageGroup;

    String m_userAgent;

    WebCore::IntSize m_viewSize;
    std::unique_ptr<DrawingArea> m_drawingArea;

    HashSet<PluginView*> m_pluginViews;
    bool m_hasSeenPlugin { false };

    HashMap<uint64_t, RefPtr<WebCore::TextCheckingRequest>> m_pendingTextCheckingRequestMap;

    bool m_useFixedLayout { false };
    bool m_drawsBackground { true };

    WebCore::Color m_underlayColor;

    bool m_isInRedo { false };
    bool m_isClosed { false };
    bool m_tabToLinks { false };
    
    bool m_asynchronousPluginInitializationEnabled { false };
    bool m_asynchronousPluginInitializationEnabledForAllPlugins { false };
    bool m_artificialPluginInitializationDelayEnabled { false };
    bool m_scrollingPerformanceLoggingEnabled { false };
    bool m_mainFrameIsScrollable { true };

#if PLATFORM(IOS)
    bool m_ignoreViewportScalingConstraints { false };
#endif

#if ENABLE(PRIMARY_SNAPSHOTTED_PLUGIN_HEURISTIC)
    bool m_readyToFindPrimarySnapshottedPlugin { false };
    bool m_didFindPrimarySnapshottedPlugin { false };
    unsigned m_numberOfPrimarySnapshotDetectionAttempts { 0 };
    String m_primaryPlugInPageOrigin;
    String m_primaryPlugInOrigin;
    String m_primaryPlugInMimeType;
    RunLoop::Timer<WebPage> m_determinePrimarySnapshottedPlugInTimer;
#endif

    // The layer hosting mode.
    LayerHostingMode m_layerHostingMode;

#if PLATFORM(COCOA)
    bool m_pdfPluginEnabled { false };
    bool m_hasCachedWindowFrame { false };

    // The frame of the containing window in screen coordinates.
    WebCore::FloatRect m_windowFrameInScreenCoordinates;

    // The frame of the containing window in unflipped screen coordinates.
    WebCore::FloatRect m_windowFrameInUnflippedScreenCoordinates;

    // The frame of the view in window coordinates.
    WebCore::FloatRect m_viewFrameInWindowCoordinates;

    // The accessibility position of the view.
    WebCore::FloatPoint m_accessibilityPosition;
    
    RetainPtr<WKAccessibilityWebPageObject> m_mockAccessibilityElement;

    ViewGestureGeometryCollector m_viewGestureGeometryCollector;

    RetainPtr<NSDictionary> m_dataDetectionContext;

#elif HAVE(ACCESSIBILITY) && PLATFORM(GTK)
    GRefPtr<WebPageAccessibilityObject> m_accessibilityObject;
#endif

#if PLATFORM(GTK) && USE(TEXTURE_MAPPER_GL)
    // Our view's window in the UI process.
    uint64_t m_nativeWindowHandle { 0 };
#endif

#if !PLATFORM(IOS)
    RefPtr<PageBanner> m_headerBanner;
    RefPtr<PageBanner> m_footerBanner;
#endif // !PLATFORM(IOS)

    RunLoop::Timer<WebPage> m_setCanStartMediaTimer;
    bool m_mayStartMediaWhenInWindow { false };

    HashMap<uint64_t, RefPtr<WebUndoStep>> m_undoStepMap;

#if ENABLE(CONTEXT_MENUS)
    std::unique_ptr<API::InjectedBundle::PageContextMenuClient> m_contextMenuClient;
#endif
    std::unique_ptr<API::InjectedBundle::EditorClient> m_editorClient;
    std::unique_ptr<API::InjectedBundle::FormClient> m_formClient;
    InjectedBundlePageLoaderClient m_loaderClient;
    InjectedBundlePagePolicyClient m_policyClient;
    InjectedBundlePageResourceLoadClient m_resourceLoadClient;
    std::unique_ptr<API::InjectedBundle::PageUIClient> m_uiClient;
#if ENABLE(FULLSCREEN_API)
    InjectedBundlePageFullScreenClient m_fullScreenClient;
#endif

    FindController m_findController;

    RefPtr<WebInspector> m_inspector;
    RefPtr<WebInspectorUI> m_inspectorUI;
    RefPtr<RemoteWebInspectorUI> m_remoteInspectorUI;

#if (PLATFORM(IOS) && HAVE(AVKIT)) || (PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE))
    RefPtr<WebPlaybackSessionManager> m_playbackSessionManager;
    RefPtr<WebVideoFullscreenManager> m_videoFullscreenManager;
#endif
#if PLATFORM(IOS)
    bool m_allowsMediaDocumentInlinePlayback { false };
#endif
#if ENABLE(FULLSCREEN_API)
    RefPtr<WebFullScreenManager> m_fullScreenManager;
#endif
    RefPtr<WebPopupMenu> m_activePopupMenu;
#if ENABLE(CONTEXT_MENUS)
    RefPtr<WebContextMenu> m_contextMenu;
#endif
#if ENABLE(INPUT_TYPE_COLOR)
    WebColorChooser* m_activeColorChooser { nullptr };
#endif
    RefPtr<WebOpenPanelResultListener> m_activeOpenPanelResultListener;
    RefPtr<NotificationPermissionRequestManager> m_notificationPermissionRequestManager;

    Ref<WebUserContentController> m_userContentController;

#if ENABLE(GEOLOCATION)
    GeolocationPermissionRequestManager m_geolocationPermissionRequestManager;
#endif

#if ENABLE(MEDIA_STREAM)
    UserMediaPermissionRequestManager m_userMediaPermissionRequestManager;
#endif

    std::unique_ptr<WebCore::PrintContext> m_printContext;
#if PLATFORM(GTK)
    RefPtr<WebPrintOperationGtk> m_printOperation;
#endif

    SandboxExtensionTracker m_sandboxExtensionTracker;

    RefPtr<SandboxExtension> m_pendingDropSandboxExtension;
    Vector<RefPtr<SandboxExtension>> m_pendingDropExtensionsForFileUpload;

    WebCore::HysteresisActivity m_pageScrolledHysteresis;

    bool m_canRunBeforeUnloadConfirmPanel { false };

    bool m_canRunModal { false };
    bool m_isRunningModal { false };

#if ENABLE(DRAG_SUPPORT)
    bool m_isStartingDrag { false };
#endif

    bool m_cachedMainFrameIsPinnedToLeftSide { true };
    bool m_cachedMainFrameIsPinnedToRightSide { true };
    bool m_cachedMainFrameIsPinnedToTopSide { true };
    bool m_cachedMainFrameIsPinnedToBottomSide { true };
    bool m_canShortCircuitHorizontalWheelEvents { false };
    bool m_hasWheelEventHandlers { false };

    unsigned m_cachedPageCount { 0 };

    HashSet<unsigned long> m_trackedNetworkResourceRequestIdentifiers;

    WebCore::IntSize m_minimumLayoutSize;
    bool m_autoSizingShouldExpandToViewHeight { false };

    bool m_userIsInteracting { false };
    bool m_isAssistingNodeDueToUserInteraction { false };
    bool m_hasEverFocusedElementDueToUserInteractionSincePageTransition { false };
    bool m_needsHiddenContentEditableQuirk { false };
    bool m_needsPlainTextQuirk { false };

#if ENABLE(CONTEXT_MENUS)
    bool m_isShowingContextMenu { false };
#endif

    RefPtr<WebCore::Node> m_assistedNode;
    bool m_hasPendingBlurNotification { false };
    
#if PLATFORM(IOS)
    RefPtr<WebCore::Range> m_currentWordRange;
    RefPtr<WebCore::Node> m_interactionNode;
    WebCore::IntPoint m_lastInteractionLocation;
    
    enum SelectionAnchor {
        Start,
        End
    };
    SelectionAnchor m_selectionAnchor { Start };

    RefPtr<WebCore::Node> m_potentialTapNode;
    WebCore::FloatPoint m_potentialTapLocation;

    WebCore::ViewportConfiguration m_viewportConfiguration;
    bool m_hasReceivedVisibleContentRectsAfterDidCommitLoad { false };
    bool m_scaleWasSetByUIProcess { false };
    bool m_userHasChangedPageScaleFactor { false };
    bool m_hasStablePageScaleFactor { true };
    bool m_useTestingViewportConfiguration { false };
    bool m_isInStableState { true };
    bool m_forceAlwaysUserScalable { false };
    MonotonicTime m_oldestNonStableUpdateVisibleContentRectsTimestamp;
    Seconds m_estimatedLatency { 0 };
    WebCore::FloatSize m_screenSize;
    WebCore::FloatSize m_availableScreenSize;
    RefPtr<WebCore::Range> m_currentBlockSelection;
    WebCore::IntRect m_blockRectForTextSelection;

    RefPtr<WebCore::Range> m_initialSelection;
    WebCore::IntSize m_blockSelectionDesiredSize;
    WebCore::FloatSize m_maximumUnobscuredSize;
    int32_t m_deviceOrientation { 0 };
    bool m_inDynamicSizeUpdate { false };
    HashMap<std::pair<WebCore::IntSize, double>, WebCore::IntPoint> m_dynamicSizeUpdateHistory;
    RefPtr<WebCore::Node> m_pendingSyntheticClickNode;
    WebCore::FloatPoint m_pendingSyntheticClickLocation;
    WebCore::FloatRect m_previousExposedContentRect;
#endif

    WebCore::Timer m_layerVolatilityTimer;
    Vector<std::function<void ()>> m_markLayersAsVolatileCompletionHandlers;
    bool m_isSuspendedUnderLock { false };

    HashSet<String, ASCIICaseInsensitiveHash> m_mimeTypesWithCustomContentProviders;
    WebCore::Color m_backgroundColor { WebCore::Color::white };

    HashSet<unsigned> m_activeRenderingSuppressionTokens;
    unsigned m_maximumRenderingSuppressionToken { 0 };
    
    WebCore::ScrollPinningBehavior m_scrollPinningBehavior { WebCore::DoNotPin };
    std::optional<WebCore::ScrollbarOverlayStyle> m_scrollbarOverlayStyle;

    bool m_useAsyncScrolling { false };

    WebCore::ActivityState::Flags m_activityState;

    bool m_processSuppressionEnabled;
    UserActivity m_userActivity;
    WebCore::HysteresisActivity m_userActivityHysteresis;

    uint64_t m_pendingNavigationID { 0 };

#if ENABLE(WEBGL)
    WebCore::WebGLLoadPolicy m_systemWebGLPolicy { WebCore::WebGLAllowCreation };
#endif

    bool m_mainFrameProgressCompleted { false };
    bool m_shouldDispatchFakeMouseMoveEvents { true };
    bool m_isEditorStateMissingPostLayoutData { false };
    bool m_isSelectingTextWhileInsertingAsynchronously { false };

    enum class EditorStateIsContentEditable { No, Yes, Unset };
    mutable EditorStateIsContentEditable m_lastEditorStateWasContentEditable { EditorStateIsContentEditable::Unset };

#if PLATFORM(GTK)
    bool m_inputMethodEnabled { false };
#endif

#if ENABLE(VIDEO) && USE(GSTREAMER)
    RefPtr<WebCore::MediaPlayerRequestInstallMissingPluginsCallback> m_installMediaPluginsCallback;
#endif

#if USE(OS_STATE)
    std::chrono::system_clock::time_point m_loadCommitTime;
#endif

    WebCore::UserInterfaceLayoutDirection m_userInterfaceLayoutDirection { WebCore::UserInterfaceLayoutDirection::LTR };

    const String m_overrideContentSecurityPolicy;
};

} // namespace WebKit