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#ifndef RENDER_WIDGET_HOST_VIEW_QT_H
#define RENDER_WIDGET_HOST_VIEW_QT_H

#include "render_widget_host_view_qt_delegate.h"

#include "base/memory/weak_ptr.h"
#include "components/viz/common/frame_sinks/begin_frame_source.h"
#include "components/viz/common/resources/transferable_resource.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "content/browser/renderer_host/text_input_manager.h"
#include "content/common/view_messages.h"
#include "gpu/ipc/common/gpu_messages.h"
#include "ui/events/gesture_detection/filtered_gesture_provider.h"
#include "qtwebenginecoreglobal_p.h"
#include <QMap>
#include <QPoint>
#include <QtGlobal>
#include <QtGui/qaccessible.h>
#include <QtGui/QTouchEvent>

#include "delegated_frame_node.h"

QT_BEGIN_NAMESPACE
class QAccessibleInterface;
QT_END_NAMESPACE

namespace content {
class RenderFrameHost;
class RenderWidgetHostImpl;
}

namespace QtWebEngineCore {

struct MultipleMouseClickHelper
{
    QPoint lastPressPosition;
    Qt::MouseButton lastPressButton;
    int clickCounter;
    ulong lastPressTimestamp;

    MultipleMouseClickHelper()
        : lastPressPosition(QPoint())
        , lastPressButton(Qt::NoButton)
        , clickCounter(0)
        , lastPressTimestamp(0)
    {
    }
};

class RenderWidgetHostViewQt
    : public content::RenderWidgetHostViewBase
    , public ui::GestureProviderClient
    , public RenderWidgetHostViewQtDelegateClient
    , public base::SupportsWeakPtr<RenderWidgetHostViewQt>
    , public viz::BeginFrameObserverBase
#ifndef QT_NO_ACCESSIBILITY
    , public QAccessible::ActivationObserver
#endif // QT_NO_ACCESSIBILITY
    , public content::TextInputManager::Observer
{
public:
    enum LoadVisuallyCommittedState {
        NotCommitted,
        DidFirstVisuallyNonEmptyPaint,
        DidFirstCompositorFrameSwap
    };

    RenderWidgetHostViewQt(content::RenderWidgetHost* widget);
    ~RenderWidgetHostViewQt();

    RenderWidgetHostViewQtDelegate *delegate() { return m_delegate.get(); }
    void setDelegate(RenderWidgetHostViewQtDelegate *delegate);
    void setAdapterClient(WebContentsAdapterClient *adapterClient);

    void InitAsChild(gfx::NativeView) override;
    void InitAsPopup(content::RenderWidgetHostView*, const gfx::Rect&) override;
    void InitAsFullscreen(content::RenderWidgetHostView*) override;
    void SetSize(const gfx::Size& size) override;
    void SetBounds(const gfx::Rect&) override;
    gfx::Vector2d GetOffsetFromRootSurface() override;
    gfx::Size GetCompositorViewportPixelSize() const override;
    gfx::NativeView GetNativeView() const override;
    gfx::NativeViewAccessible GetNativeViewAccessible() override;
    void Focus() override;
    bool HasFocus() const override;
    bool IsSurfaceAvailableForCopy() const override;
    void Show() override;
    void Hide() override;
    bool IsShowing() override;
    gfx::Rect GetViewBounds() const override;
    SkColor background_color() const override;
    void SetBackgroundColor(SkColor color) override;
    bool LockMouse() override;
    void UnlockMouse() override;
    void UpdateCursor(const content::WebCursor&) override;
    void DisplayCursor(const content::WebCursor&) override;
    void SetIsLoading(bool) override;
    void ImeCancelComposition() override;
    void ImeCompositionRangeChanged(const gfx::Range&, const std::vector<gfx::Rect>&) override;
    void RenderProcessGone(base::TerminationStatus, int) override;
    void Destroy() override;
    void SetTooltipText(const base::string16 &tooltip_text) override;
    void DisplayTooltipText(const base::string16& tooltip_text) override;
    void DidCreateNewRendererCompositorFrameSink(viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink) override;
    void SubmitCompositorFrame(const viz::LocalSurfaceId&, viz::CompositorFrame, viz::mojom::HitTestRegionListPtr) override;
    void WheelEventAck(const blink::WebMouseWheelEvent &event, content::InputEventAckState ack_result) override;

    void GetScreenInfo(content::ScreenInfo* results) const override;
    gfx::Rect GetBoundsInRootWindow() override;
    void ProcessAckedTouchEvent(const content::TouchEventWithLatencyInfo &touch, content::InputEventAckState ack_result) override;
    void ClearCompositorFrame() override;
    void SetNeedsBeginFrames(bool needs_begin_frames) override;
    void SetWantsAnimateOnlyBeginFrames() override;
    viz::SurfaceId GetCurrentSurfaceId() const override;
    void TakeFallbackContentFrom(content::RenderWidgetHostView *view) override;

    // Overridden from ui::GestureProviderClient.
    void OnGestureEvent(const ui::GestureEventData& gesture) override;

    // Overridden from RenderWidgetHostViewQtDelegateClient.
    QSGNode *updatePaintNode(QSGNode *) override;
    void notifyResize() override;
    void notifyShown() override;
    void notifyHidden() override;
    void windowBoundsChanged() override;
    void windowChanged() override;
    bool forwardEvent(QEvent *) override;
    QVariant inputMethodQuery(Qt::InputMethodQuery query) override;
    void closePopup() override;

    // Overridden from content::TextInputManager::Observer
    void OnUpdateTextInputStateCalled(content::TextInputManager *text_input_manager, RenderWidgetHostViewBase *updated_view, bool did_update_state) override;
    void OnSelectionBoundsChanged(content::TextInputManager *text_input_manager, RenderWidgetHostViewBase *updated_view) override;
    void OnTextSelectionChanged(content::TextInputManager *text_input_manager, RenderWidgetHostViewBase *updated_view) override;

    // cc::BeginFrameObserverBase implementation.
    bool OnBeginFrameDerivedImpl(const viz::BeginFrameArgs& args) override;
    void OnBeginFrameSourcePausedChanged(bool paused) override;

    void handleMouseEvent(QMouseEvent*);
    void handleKeyEvent(QKeyEvent*);
    void handleWheelEvent(QWheelEvent*);
    void handleTouchEvent(QTouchEvent*);
#if QT_CONFIG(tabletevent)
    void handleTabletEvent(QTabletEvent *ev);
#endif
#ifndef QT_NO_GESTURES
    void handleGestureEvent(QNativeGestureEvent *);
#endif
    void handleHoverEvent(QHoverEvent*);
    void handleFocusEvent(QFocusEvent*);
    void handleInputMethodEvent(QInputMethodEvent*);
    void handleInputMethodQueryEvent(QInputMethodQueryEvent*);

    template<class T> void handlePointerEvent(T*);

#if defined(OS_MACOSX)
    void SetActive(bool active) override { QT_NOT_YET_IMPLEMENTED }
    void SpeakSelection() override { QT_NOT_YET_IMPLEMENTED }
    void ShowDefinitionForSelection() override { QT_NOT_YET_IMPLEMENTED }
#endif // defined(OS_MACOSX)


    // Overridden from content::BrowserAccessibilityDelegate
    content::BrowserAccessibilityManager* CreateBrowserAccessibilityManager(content::BrowserAccessibilityDelegate* delegate, bool for_root_frame) override;
#ifndef QT_NO_ACCESSIBILITY
    void accessibilityActiveChanged(bool active) override;
#endif // QT_NO_ACCESSIBILITY
    LoadVisuallyCommittedState getLoadVisuallyCommittedState() const { return m_loadVisuallyCommittedState; }
    void setLoadVisuallyCommittedState(LoadVisuallyCommittedState state) { m_loadVisuallyCommittedState = state; }

    gfx::SizeF lastContentsSize() const { return m_lastContentsSize; }
    gfx::Vector2dF lastScrollOffset() const { return m_lastScrollOffset; }

private:
    void sendDelegatedFrameAck();
    void processMotionEvent(const ui::MotionEvent &motionEvent);
    void clearPreviousTouchMotionState();
    QList<QTouchEvent::TouchPoint> mapTouchPointIds(const QList<QTouchEvent::TouchPoint> &inputPoints);
    float dpiScale() const;
    void updateNeedsBeginFramesInternal();

    bool IsPopup() const;

    void selectionChanged();
    content::RenderFrameHost *getFocusedFrameHost();
    ui::TextInputType getTextInputType() const;

    ui::FilteredGestureProvider m_gestureProvider;
    base::TimeDelta m_eventsToNowDelta;
    bool m_sendMotionActionDown;
    bool m_touchMotionStarted;
    QMap<int, int> m_touchIdMapping;
    QList<QTouchEvent::TouchPoint> m_previousTouchPoints;
    std::unique_ptr<RenderWidgetHostViewQtDelegate> m_delegate;

    QExplicitlySharedDataPointer<ChromiumCompositorData> m_chromiumCompositorData;
    std::vector<viz::ReturnedResource> m_resourcesToRelease;
    bool m_needsDelegatedFrameAck;
    LoadVisuallyCommittedState m_loadVisuallyCommittedState;

    QMetaObject::Connection m_adapterClientDestroyedConnection;
    WebContentsAdapterClient *m_adapterClient;
    MultipleMouseClickHelper m_clickHelper;
    viz::mojom::CompositorFrameSinkClient *m_rendererCompositorFrameSink;

    bool m_imeInProgress;
    bool m_receivedEmptyImeEvent;
    QPoint m_previousMousePosition;

    bool m_initPending;

    std::unique_ptr<viz::SyntheticBeginFrameSource> m_beginFrameSource;
    bool m_needsBeginFrames;
    bool m_addedFrameObserver;

    gfx::Vector2dF m_lastScrollOffset;
    gfx::SizeF m_lastContentsSize;
    SkColor m_backgroundColor;
    viz::LocalSurfaceId m_localSurfaceId;

    uint m_imState;
    int m_anchorPositionWithinSelection;
    int m_cursorPositionWithinSelection;
    uint m_cursorPosition;
    bool m_emptyPreviousSelection;
    QString m_surroundingText;

    bool m_imeHasHiddenTextCapability;

    bool m_wheelAckPending;
    QList<blink::WebMouseWheelEvent> m_pendingWheelEvents;

    std::string m_editCommand;
};

} // namespace QtWebEngineCore

#endif // RENDER_WIDGET_HOST_VIEW_QT_H