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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* rendering object that goes directly inside the document's scrollbars */
#ifndef nsCanvasFrame_h___
#define nsCanvasFrame_h___
#include "mozilla/Attributes.h"
#include "mozilla/EventForwards.h"
#include "nsContainerFrame.h"
#include "nsDisplayList.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIPopupContainer.h"
#include "nsIScrollPositionListener.h"
class nsPresContext;
class gfxContext;
/**
* Root frame class.
*
* The root frame is the parent frame for the document element's frame.
* It only supports having a single child frame which must be an area
* frame.
* @note nsCanvasFrame keeps overflow container continuations of its child
* frame in the main child list.
*/
class nsCanvasFrame final : public nsContainerFrame,
public nsIScrollPositionListener,
public nsIAnonymousContentCreator,
public nsIPopupContainer {
using Element = mozilla::dom::Element;
public:
explicit nsCanvasFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID),
mDoPaintFocus(false),
mAddedScrollPositionListener(false) {}
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(nsCanvasFrame)
Element* GetDefaultTooltip() override;
void Destroy(DestroyContext&) override;
void SetInitialChildList(ChildListID aListID,
nsFrameList&& aChildList) override;
void AppendFrames(ChildListID aListID, nsFrameList&& aFrameList) override;
void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList&& aFrameList) override;
#ifdef DEBUG
void RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) override;
#endif
nscoord IntrinsicISize(const mozilla::IntrinsicSizeInput& aInput,
mozilla::IntrinsicISizeType aType) override;
void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
// nsIAnonymousContentCreator
nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) override;
/** SetHasFocus tells the CanvasFrame to draw with focus ring
* @param aHasFocus true to show focus ring, false to hide it
*/
NS_IMETHOD SetHasFocus(bool aHasFocus);
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
void PaintFocus(mozilla::gfx::DrawTarget* aRenderingContext, nsPoint aPt);
// nsIScrollPositionListener
void ScrollPositionWillChange(nscoord aX, nscoord aY) override;
void ScrollPositionDidChange(nscoord aX, nscoord aY) override {}
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override;
#endif
nsIContent* GetContentForEvent(const mozilla::WidgetEvent*) const override;
nsRect CanvasArea() const;
protected:
// Data members
bool mDoPaintFocus;
bool mAddedScrollPositionListener;
nsCOMPtr<Element> mTooltipContent;
};
namespace mozilla {
class nsDisplayCanvasBackgroundImage final : public nsDisplayBackgroundImage {
public:
explicit nsDisplayCanvasBackgroundImage(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
const InitData& aInitData)
: nsDisplayBackgroundImage(aBuilder, aFrame, aInitData) {}
void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
// We still need to paint a background color as well as an image for this
// item, so we can't support this yet.
bool SupportsOptimizingToImage() const override { return false; }
bool IsSingleFixedPositionImage(nsDisplayListBuilder* aBuilder,
const nsRect& aClipRect, gfxRect* aDestRect);
NS_DISPLAY_DECL_NAME("CanvasBackgroundImage", TYPE_CANVAS_BACKGROUND_IMAGE)
};
} // namespace mozilla
#endif /* nsCanvasFrame_h___ */
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