mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
d5de0be854
This changes nsDisplayImage::GetDestRect and nsImageFrame::PredictedDestRect to return the true dest rect of the image, without intersecting it with the image content box. The only caller of these functions that actually requires a rectangle that's within the image's content bounds is nsDisplayImage::GetOpaqueRegion, so I'm changing that to intersect with the display item's bounds. I'm pretty sure nsImageFrame::MaybeDecodeForPredictedSize() also prefers the unclipped dest rect, because it cares about the scale at which the image is painted, and not about which parts of the image are painted.
471 lines
16 KiB
C++
471 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering object for replaced elements with image data */
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#ifndef nsImageFrame_h___
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#define nsImageFrame_h___
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#include "nsSplittableFrame.h"
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#include "nsIIOService.h"
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#include "nsIObserver.h"
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#include "imgINotificationObserver.h"
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#include "nsDisplayList.h"
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#include "imgIContainer.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/DebugOnly.h"
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#include "nsIReflowCallback.h"
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#include "nsTObserverArray.h"
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class nsFontMetrics;
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class nsImageMap;
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class nsIURI;
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class nsILoadGroup;
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struct nsHTMLReflowState;
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class nsHTMLReflowMetrics;
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class nsDisplayImage;
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class nsPresContext;
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class nsImageFrame;
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class nsTransform2D;
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class nsImageLoadingContent;
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namespace mozilla {
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namespace layers {
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class ImageContainer;
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class ImageLayer;
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class LayerManager;
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} // namespace layers
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} // namespace mozilla
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class nsImageListener : public imgINotificationObserver
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{
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protected:
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virtual ~nsImageListener();
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public:
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explicit nsImageListener(nsImageFrame *aFrame);
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NS_DECL_ISUPPORTS
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NS_DECL_IMGINOTIFICATIONOBSERVER
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void SetFrame(nsImageFrame *frame) { mFrame = frame; }
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private:
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nsImageFrame *mFrame;
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};
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typedef nsSplittableFrame ImageFrameSuper;
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class nsImageFrame : public ImageFrameSuper,
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public nsIReflowCallback {
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public:
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typedef mozilla::image::DrawResult DrawResult;
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typedef mozilla::layers::ImageContainer ImageContainer;
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typedef mozilla::layers::ImageLayer ImageLayer;
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typedef mozilla::layers::LayerManager LayerManager;
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NS_DECL_FRAMEARENA_HELPERS
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explicit nsImageFrame(nsStyleContext* aContext);
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NS_DECL_QUERYFRAME_TARGET(nsImageFrame)
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NS_DECL_QUERYFRAME
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
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virtual mozilla::IntrinsicSize GetIntrinsicSize() override;
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virtual nsSize GetIntrinsicRatio() override;
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virtual void Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) override;
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virtual nsresult GetContentForEvent(mozilla::WidgetEvent* aEvent,
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nsIContent** aContent) override;
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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virtual nsresult GetCursor(const nsPoint& aPoint,
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nsIFrame::Cursor& aCursor) override;
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
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virtual nsIAtom* GetType() const override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return ImageFrameSuper::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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void List(FILE* out = stderr, const char* aPrefix = "",
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uint32_t aFlags = 0) const override;
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#endif
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virtual LogicalSides GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const override;
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nsresult GetIntrinsicImageSize(nsSize& aSize);
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static void ReleaseGlobals() {
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if (gIconLoad) {
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gIconLoad->Shutdown();
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NS_RELEASE(gIconLoad);
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}
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NS_IF_RELEASE(sIOService);
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}
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nsresult Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData);
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/**
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* Function to test whether aContent, which has aStyleContext as its style,
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* should get an image frame. Note that this method is only used by the
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* frame constructor; it's only here because it uses gIconLoad for now.
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*/
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static bool ShouldCreateImageFrameFor(mozilla::dom::Element* aElement,
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nsStyleContext* aStyleContext);
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DrawResult DisplayAltFeedback(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsPoint aPt,
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uint32_t aFlags);
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nsRect GetInnerArea() const;
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/**
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* Return a map element associated with this image.
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*/
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mozilla::dom::Element* GetMapElement() const;
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/**
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* Return true if the image has associated image map.
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*/
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bool HasImageMap() const { return mImageMap || GetMapElement(); }
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nsImageMap* GetImageMap();
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nsImageMap* GetExistingImageMap() const { return mImageMap; }
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virtual void AddInlineMinISize(nsRenderingContext *aRenderingContext,
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InlineMinISizeData *aData) override;
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void DisconnectMap();
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// nsIReflowCallback
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virtual bool ReflowFinished() override;
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virtual void ReflowCallbackCanceled() override;
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protected:
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virtual ~nsImageFrame();
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void EnsureIntrinsicSizeAndRatio();
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virtual mozilla::LogicalSize
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ComputeSize(nsRenderingContext *aRenderingContext,
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mozilla::WritingMode aWritingMode,
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const mozilla::LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorder,
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const mozilla::LogicalSize& aPadding,
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ComputeSizeFlags aFlags) override;
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bool IsServerImageMap();
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void TranslateEventCoords(const nsPoint& aPoint,
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nsIntPoint& aResult);
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bool GetAnchorHREFTargetAndNode(nsIURI** aHref, nsString& aTarget,
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nsIContent** aNode);
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/**
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* Computes the width of the string that fits into the available space
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*
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* @param in aLength total length of the string in PRUnichars
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* @param in aMaxWidth width not to be exceeded
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* @param out aMaxFit length of the string that fits within aMaxWidth
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* in PRUnichars
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* @return width of the string that fits within aMaxWidth
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*/
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nscoord MeasureString(const char16_t* aString,
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int32_t aLength,
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nscoord aMaxWidth,
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uint32_t& aMaxFit,
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nsRenderingContext& aContext,
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nsFontMetrics& aFontMetrics);
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void DisplayAltText(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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const nsString& aAltText,
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const nsRect& aRect);
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DrawResult PaintImage(nsRenderingContext& aRenderingContext, nsPoint aPt,
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const nsRect& aDirtyRect, imgIContainer* aImage,
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uint32_t aFlags);
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/**
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* If we're ready to decode - that is, if our current request's image is
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* available and our decoding heuristics are satisfied - then trigger a decode
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* for our image at the size we predict it will be drawn next time it's
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* painted.
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*/
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void MaybeDecodeForPredictedSize();
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protected:
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friend class nsImageListener;
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friend class nsImageLoadingContent;
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friend class PresShell;
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nsresult OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
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nsresult OnFrameUpdate(imgIRequest* aRequest, const nsIntRect* aRect);
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nsresult OnLoadComplete(imgIRequest* aRequest, nsresult aStatus);
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/**
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* Notification that aRequest will now be the current request.
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*/
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void NotifyNewCurrentRequest(imgIRequest *aRequest, nsresult aStatus);
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/// Always sync decode our image when painting if @aForce is true.
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void SetForceSyncDecoding(bool aForce) { mForceSyncDecoding = aForce; }
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/**
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* Computes the predicted dest rect that we'll draw into, in app units, based
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* upon the provided frame content box. (The content box is what
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* nsDisplayImage::GetBounds() returns.)
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* The result is not necessarily contained in the frame content box.
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*/
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nsRect PredictedDestRect(const nsRect& aFrameContentBox);
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private:
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// random helpers
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inline void SpecToURI(const nsAString& aSpec, nsIIOService *aIOService,
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nsIURI **aURI);
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inline void GetLoadGroup(nsPresContext *aPresContext,
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nsILoadGroup **aLoadGroup);
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nscoord GetContinuationOffset() const;
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void GetDocumentCharacterSet(nsACString& aCharset) const;
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bool ShouldDisplaySelection();
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/**
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* Recalculate mIntrinsicSize from the image.
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*
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* @return whether aImage's size did _not_
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* match our previous intrinsic size.
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*/
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bool UpdateIntrinsicSize(imgIContainer* aImage);
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/**
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* Recalculate mIntrinsicRatio from the image.
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*
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* @return whether aImage's ratio did _not_
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* match our previous intrinsic ratio.
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*/
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bool UpdateIntrinsicRatio(imgIContainer* aImage);
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/**
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* This function calculates the transform for converting between
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* source space & destination space. May fail if our image has a
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* percent-valued or zero-valued height or width.
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*
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* @param aTransform The transform object to populate.
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*
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* @return whether we succeeded in creating the transform.
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*/
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bool GetSourceToDestTransform(nsTransform2D& aTransform);
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/**
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* Helper function to check whether the request corresponds to a load we don't
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* care about. Most of the decoder observer methods will bail early if this
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* returns true.
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*/
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bool IsPendingLoad(imgIRequest* aRequest) const;
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/**
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* Function to convert a dirty rect in the source image to a dirty
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* rect for the image frame.
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*/
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nsRect SourceRectToDest(const nsIntRect & aRect);
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/**
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* Triggers invalidation for both our image display item and, if appropriate,
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* our alt-feedback display item.
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*
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* @param aLayerInvalidRect The area to invalidate in layer space. If null, the
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* entire layer will be invalidated.
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* @param aFrameInvalidRect The area to invalidate in frame space. If null, the
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* entire frame will be invalidated.
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*/
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void InvalidateSelf(const nsIntRect* aLayerInvalidRect,
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const nsRect* aFrameInvalidRect);
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RefPtr<nsImageMap> mImageMap;
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nsCOMPtr<imgINotificationObserver> mListener;
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nsCOMPtr<imgIContainer> mImage;
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nsSize mComputedSize;
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mozilla::IntrinsicSize mIntrinsicSize;
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nsSize mIntrinsicRatio;
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bool mDisplayingIcon;
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bool mFirstFrameComplete;
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bool mReflowCallbackPosted;
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bool mForceSyncDecoding;
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static nsIIOService* sIOService;
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/* loading / broken image icon support */
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// XXXbz this should be handled by the prescontext, I think; that
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// way we would have a single iconload per mozilla session instead
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// of one per document...
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// LoadIcons: initiate the loading of the static icons used to show
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// loading / broken images
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nsresult LoadIcons(nsPresContext *aPresContext);
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nsresult LoadIcon(const nsAString& aSpec, nsPresContext *aPresContext,
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imgRequestProxy **aRequest);
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class IconLoad final : public nsIObserver,
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public imgINotificationObserver
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{
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// private class that wraps the data and logic needed for
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// broken image and loading image icons
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public:
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IconLoad();
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void Shutdown();
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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NS_DECL_IMGINOTIFICATIONOBSERVER
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void AddIconObserver(nsImageFrame *frame) {
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MOZ_ASSERT(!mIconObservers.Contains(frame),
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"Observer shouldn't aleady be in array");
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mIconObservers.AppendElement(frame);
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}
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void RemoveIconObserver(nsImageFrame *frame) {
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mozilla::DebugOnly<bool> didRemove = mIconObservers.RemoveElement(frame);
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MOZ_ASSERT(didRemove, "Observer not in array");
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}
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private:
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~IconLoad() {}
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void GetPrefs();
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nsTObserverArray<nsImageFrame*> mIconObservers;
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public:
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RefPtr<imgRequestProxy> mLoadingImage;
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RefPtr<imgRequestProxy> mBrokenImage;
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bool mPrefForceInlineAltText;
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bool mPrefShowPlaceholders;
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bool mPrefShowLoadingPlaceholder;
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};
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public:
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static IconLoad* gIconLoad; // singleton pattern: one LoadIcons instance is used
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friend class nsDisplayImage;
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};
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/**
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* Note that nsDisplayImage does not receive events. However, an image element
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* is replaced content so its background will be z-adjacent to the
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* image itself, and hence receive events just as if the image itself
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* received events.
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*/
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class nsDisplayImage : public nsDisplayImageContainer {
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public:
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typedef mozilla::layers::LayerManager LayerManager;
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nsDisplayImage(nsDisplayListBuilder* aBuilder, nsImageFrame* aFrame,
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imgIContainer* aImage)
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: nsDisplayImageContainer(aBuilder, aFrame), mImage(aImage) {
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MOZ_COUNT_CTOR(nsDisplayImage);
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}
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virtual ~nsDisplayImage() {
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MOZ_COUNT_DTOR(nsDisplayImage);
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}
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virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
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virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
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const nsDisplayItemGeometry* aGeometry,
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nsRegion* aInvalidRegion) override;
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx) override;
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virtual bool CanOptimizeToImageLayer(LayerManager* aManager,
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nsDisplayListBuilder* aBuilder) override;
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/**
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* Returns an ImageContainer for this image if the image type
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* supports it (TYPE_RASTER only).
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*/
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virtual already_AddRefed<ImageContainer> GetContainer(LayerManager* aManager,
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nsDisplayListBuilder* aBuilder) override;
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/**
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* @return The dest rect we'll use when drawing this image, in app units.
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* Not necessarily contained in this item's bounds.
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*/
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nsRect GetDestRect(bool* aSnap = nullptr);
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virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aParameters) override;
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nsRect GetBounds(bool* aSnap)
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{
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*aSnap = true;
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nsImageFrame* imageFrame = static_cast<nsImageFrame*>(mFrame);
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return imageFrame->GetInnerArea() + ToReferenceFrame();
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}
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
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bool* aSnap) override
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{
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return GetBounds(aSnap);
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}
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virtual nsRegion GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
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bool* aSnap) override;
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virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aContainerParameters) override;
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/**
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* Configure an ImageLayer for this display item.
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* Set the required filter and scaling transform.
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*/
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virtual void ConfigureLayer(ImageLayer* aLayer,
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const ContainerLayerParameters& aParameters) override;
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NS_DISPLAY_DECL_NAME("Image", TYPE_IMAGE)
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private:
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nsCOMPtr<imgIContainer> mImage;
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};
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#endif /* nsImageFrame_h___ */
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