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gecko-dev/layout/generic/nsImageFrame.cpp

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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 for replaced elements with image data */
#include "nsImageFrame.h"
#include "TextDrawTarget.h"
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "gfxUtils.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Encoding.h"
#include "mozilla/EventStates.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/dom/ImageTracker.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Helpers.h"
#include "mozilla/gfx/PathHelpers.h"
#include "mozilla/dom/GeneratedImageContent.h"
#include "mozilla/dom/HTMLAreaElement.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/ResponsiveImageSelector.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresShellInlines.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/Unused.h"
#include "nsCOMPtr.h"
#include "nsFontMetrics.h"
#include "nsIImageLoadingContent.h"
#include "nsImageLoadingContent.h"
#include "nsString.h"
#include "nsPrintfCString.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "mozilla/dom/Document.h"
#include "nsContentUtils.h"
#include "nsCSSAnonBoxes.h"
#include "nsStyleConsts.h"
#include "nsStyleUtil.h"
#include "nsTransform2D.h"
#include "nsImageMap.h"
#include "nsILoadGroup.h"
#include "nsNetUtil.h"
#include "nsNetCID.h"
#include "nsCSSRendering.h"
#include "nsNameSpaceManager.h"
#include <algorithm>
#ifdef ACCESSIBILITY
# include "nsAccessibilityService.h"
#endif
#include "nsLayoutUtils.h"
#include "nsDisplayList.h"
#include "nsIContent.h"
#include "FrameLayerBuilder.h"
#include "mozilla/dom/Selection.h"
#include "nsIURIMutator.h"
#include "imgIContainer.h"
#include "imgLoader.h"
#include "imgRequestProxy.h"
#include "nsCSSFrameConstructor.h"
#include "nsRange.h"
#include "nsError.h"
#include "nsBidiUtils.h"
#include "nsBidiPresUtils.h"
#include "gfxRect.h"
#include "ImageLayers.h"
#include "ImageContainer.h"
#include "mozilla/ServoStyleSet.h"
#include "nsBlockFrame.h"
#include "nsStyleStructInlines.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Link.h"
#include "SVGImageContext.h"
#include "mozilla/dom/HTMLAnchorElement.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
using namespace mozilla::layers;
using mozilla::layout::TextDrawTarget;
// sizes (pixels) for image icon, padding and border frame
#define ICON_SIZE (16)
#define ICON_PADDING (3)
#define ALT_BORDER_WIDTH (1)
// Default alignment value (so we can tell an unset value from a set value)
#define ALIGN_UNSET uint8_t(-1)
// static icon information
StaticRefPtr<nsImageFrame::IconLoad> nsImageFrame::gIconLoad;
// test if the width and height are fixed, looking at the style data
// This is used by nsImageFrame::ShouldCreateImageFrameFor and should
// not be used for layout decisions.
static bool HaveSpecifiedSize(const nsStylePosition* aStylePosition) {
// check the width and height values in the reflow input's style struct
// - if width and height are specified as either coord or percentage, then
// the size of the image frame is constrained
return aStylePosition->mWidth.IsLengthPercentage() &&
aStylePosition->mHeight.IsLengthPercentage();
}
template <typename SizeOrMaxSize>
static bool DependsOnIntrinsicSize(const SizeOrMaxSize& aMinOrMaxSize) {
if (!aMinOrMaxSize.IsExtremumLength()) {
return false;
}
auto keyword = aMinOrMaxSize.AsExtremumLength();
switch (keyword) {
case StyleExtremumLength::MinContent:
case StyleExtremumLength::MaxContent:
case StyleExtremumLength::MozFitContent:
return true;
case StyleExtremumLength::MozAvailable:
return false;
}
MOZ_ASSERT_UNREACHABLE("Unknown sizing keyword?");
return false;
}
// Decide whether we can optimize away reflows that result from the
// image's intrinsic size changing.
static bool SizeDependsOnIntrinsicSize(const ReflowInput& aReflowInput) {
const auto& position = *aReflowInput.mStylePosition;
WritingMode wm = aReflowInput.GetWritingMode();
// Don't try to make this optimization when an image has percentages
// in its 'width' or 'height'. The percentages might be treated like
// auto (especially for intrinsic width calculations and for heights).
//
// min-width: min-content and such can also affect our intrinsic size.
// but note that those keywords on the block axis behave like auto, so we
// don't need to check them.
return !position.mHeight.ConvertsToLength() ||
!position.mWidth.ConvertsToLength() ||
DependsOnIntrinsicSize(position.MinISize(wm)) ||
DependsOnIntrinsicSize(position.MaxISize(wm));
}
nsIFrame* NS_NewImageFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell) nsImageFrame(aStyle, aPresShell->GetPresContext(),
nsImageFrame::Kind::ImageElement);
}
nsIFrame* NS_NewImageFrameForContentProperty(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell) nsImageFrame(aStyle, aPresShell->GetPresContext(),
nsImageFrame::Kind::ContentProperty);
}
nsIFrame* NS_NewImageFrameForGeneratedContentIndex(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell)
nsImageFrame(aStyle, aPresShell->GetPresContext(),
nsImageFrame::Kind::ContentPropertyAtIndex);
}
bool nsImageFrame::ShouldShowBrokenImageIcon() const {
// NOTE(emilio, https://github.com/w3c/csswg-drafts/issues/2832): WebKit and
// Blink behave differently here for content: url(..), for now adapt to
// Blink's behavior.
if (mKind != Kind::ImageElement) {
return false;
}
// <img alt=""> is special, and it shouldn't draw the broken image icon,
// unlike the no-alt attribute or non-empty-alt-attribute case.
if (auto* image = HTMLImageElement::FromNode(mContent)) {
const nsAttrValue* alt = image->GetParsedAttr(nsGkAtoms::alt);
if (alt && alt->IsEmptyString()) {
return false;
}
}
// check for broken images. valid null images (eg. img src="") are
// not considered broken because they have no image requests
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
uint32_t imageStatus;
return NS_SUCCEEDED(currentRequest->GetImageStatus(&imageStatus)) &&
(imageStatus & imgIRequest::STATUS_ERROR);
}
nsCOMPtr<nsIImageLoadingContent> loader = do_QueryInterface(mContent);
MOZ_ASSERT(loader);
return loader->GetImageBlockingStatus() != nsIContentPolicy::ACCEPT;
}
nsImageFrame* nsImageFrame::CreateContinuingFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle) const {
return new (aPresShell)
nsImageFrame(aStyle, aPresShell->GetPresContext(), mKind);
}
NS_IMPL_FRAMEARENA_HELPERS(nsImageFrame)
nsImageFrame::nsImageFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
ClassID aID, Kind aKind)
: nsAtomicContainerFrame(aStyle, aPresContext, aID),
mComputedSize(0, 0),
mIntrinsicSize(0, 0),
mKind(aKind),
mContentURLRequestRegistered(false),
mDisplayingIcon(false),
mFirstFrameComplete(false),
mReflowCallbackPosted(false),
mForceSyncDecoding(false) {
EnableVisibilityTracking();
}
nsImageFrame::~nsImageFrame() = default;
NS_QUERYFRAME_HEAD(nsImageFrame)
NS_QUERYFRAME_ENTRY(nsImageFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsAtomicContainerFrame)
#ifdef ACCESSIBILITY
a11y::AccType nsImageFrame::AccessibleType() {
// Don't use GetImageMap() to avoid reentrancy into accessibility.
if (HasImageMap()) {
return a11y::eHTMLImageMapType;
}
return a11y::eImageType;
}
#endif
void nsImageFrame::DisconnectMap() {
if (!mImageMap) {
return;
}
mImageMap->Destroy();
mImageMap = nullptr;
#ifdef ACCESSIBILITY
if (nsAccessibilityService* accService = GetAccService()) {
accService->RecreateAccessible(PresShell(), mContent);
}
#endif
}
void nsImageFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (mReflowCallbackPosted) {
PresShell()->CancelReflowCallback(this);
mReflowCallbackPosted = false;
}
// Tell our image map, if there is one, to clean up
// This causes the nsImageMap to unregister itself as
// a DOM listener.
DisconnectMap();
MOZ_ASSERT(mListener);
if (mKind == Kind::ImageElement) {
MOZ_ASSERT(!mContentURLRequest);
MOZ_ASSERT(!mContentURLRequestRegistered);
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
MOZ_ASSERT(imageLoader);
// Notify our image loading content that we are going away so it can
// deregister with our refresh driver.
imageLoader->FrameDestroyed(this);
imageLoader->RemoveNativeObserver(mListener);
} else if (mContentURLRequest) {
PresContext()->Document()->ImageTracker()->Remove(mContentURLRequest);
nsLayoutUtils::DeregisterImageRequest(PresContext(), mContentURLRequest,
&mContentURLRequestRegistered);
mContentURLRequest->Cancel(NS_BINDING_ABORTED);
}
// set the frame to null so we don't send messages to a dead object.
mListener->SetFrame(nullptr);
mListener = nullptr;
// If we were displaying an icon, take ourselves off the list
if (mDisplayingIcon) gIconLoad->RemoveIconObserver(this);
nsAtomicContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
void nsImageFrame::DidSetComputedStyle(ComputedStyle* aOldStyle) {
nsAtomicContainerFrame::DidSetComputedStyle(aOldStyle);
auto newOrientation = StyleVisibility()->mImageOrientation;
// We need to update our orientation either if we had no ComputedStyle before
// because this is the first time it's been set, or if the image-orientation
// property changed from its previous value.
bool shouldUpdateOrientation =
mImage &&
(!aOldStyle ||
aOldStyle->StyleVisibility()->mImageOrientation != newOrientation);
if (shouldUpdateOrientation) {
nsCOMPtr<imgIContainer> image(mImage->Unwrap());
mImage = nsLayoutUtils::OrientImage(image, newOrientation);
UpdateIntrinsicSize();
UpdateIntrinsicRatio();
} else if (!aOldStyle || aOldStyle->StylePosition()->mAspectRatio !=
StylePosition()->mAspectRatio) {
UpdateIntrinsicRatio();
}
}
static bool SizeIsAvailable(imgIRequest* aRequest) {
if (!aRequest) {
return false;
}
uint32_t imageStatus = 0;
nsresult rv = aRequest->GetImageStatus(&imageStatus);
return NS_SUCCEEDED(rv) && (imageStatus & imgIRequest::STATUS_SIZE_AVAILABLE);
}
void nsImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
MOZ_ASSERT_IF(aPrevInFlow,
aPrevInFlow->Type() == Type() &&
static_cast<nsImageFrame*>(aPrevInFlow)->mKind == mKind);
nsAtomicContainerFrame::Init(aContent, aParent, aPrevInFlow);
mListener = new nsImageListener(this);
if (!gIconLoad) {
LoadIcons(PresContext());
}
if (mKind == Kind::ImageElement) {
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aContent);
MOZ_ASSERT(imageLoader);
imageLoader->AddNativeObserver(mListener);
// We have a PresContext now, so we need to notify the image content node
// that it can register images.
imageLoader->FrameCreated(this);
} else {
uint32_t contentIndex = 0;
const nsStyleContent* styleContent = StyleContent();
if (mKind == Kind::ContentPropertyAtIndex) {
MOZ_RELEASE_ASSERT(
aParent->GetContent()->IsGeneratedContentContainerForMarker() ||
aParent->GetContent()->IsGeneratedContentContainerForAfter() ||
aParent->GetContent()->IsGeneratedContentContainerForBefore());
MOZ_RELEASE_ASSERT(
aContent->IsHTMLElement(nsGkAtoms::mozgeneratedcontentimage));
nsIFrame* nonAnonymousParent = aParent;
while (nonAnonymousParent->Style()->IsAnonBox()) {
nonAnonymousParent = nonAnonymousParent->GetParent();
}
MOZ_RELEASE_ASSERT(aParent->GetContent() ==
nonAnonymousParent->GetContent());
styleContent = nonAnonymousParent->StyleContent();
contentIndex = static_cast<GeneratedImageContent*>(aContent)->Index();
}
MOZ_RELEASE_ASSERT(contentIndex < styleContent->ContentCount());
MOZ_RELEASE_ASSERT(styleContent->ContentAt(contentIndex).IsUrl());
auto& url = const_cast<StyleComputedUrl&>(
styleContent->ContentAt(contentIndex).AsUrl());
Document* doc = PresContext()->Document();
if (imgRequestProxy* proxy = url.GetImage()) {
proxy->Clone(mListener, doc, getter_AddRefs(mContentURLRequest));
SetupForContentURLRequest();
}
}
// Give image loads associated with an image frame a small priority boost.
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
uint32_t categoryToBoostPriority = imgIRequest::CATEGORY_FRAME_INIT;
// Increase load priority further if intrinsic size might be important for
// layout.
if (!HaveSpecifiedSize(StylePosition())) {
categoryToBoostPriority |= imgIRequest::CATEGORY_SIZE_QUERY;
}
currentRequest->BoostPriority(categoryToBoostPriority);
}
}
void nsImageFrame::SetupForContentURLRequest() {
MOZ_ASSERT(mKind != Kind::ImageElement);
if (!mContentURLRequest) {
return;
}
// We're not using AssociateRequestToFrame for the content property, so we
// need to add it to the image tracker manually.
PresContext()->Document()->ImageTracker()->Add(mContentURLRequest);
uint32_t status = 0;
nsresult rv = mContentURLRequest->GetImageStatus(&status);
if (NS_FAILED(rv)) {
return;
}
if (status & imgIRequest::STATUS_SIZE_AVAILABLE) {
nsCOMPtr<imgIContainer> image;
mContentURLRequest->GetImage(getter_AddRefs(image));
OnSizeAvailable(mContentURLRequest, image);
}
if (status & imgIRequest::STATUS_FRAME_COMPLETE) {
mFirstFrameComplete = true;
}
if (status & imgIRequest::STATUS_IS_ANIMATED) {
nsLayoutUtils::RegisterImageRequest(PresContext(), mContentURLRequest,
&mContentURLRequestRegistered);
}
}
static void ScaleIntrinsicSizeForDensity(nsIContent& aContent,
IntrinsicSize& aSize) {
auto* image = HTMLImageElement::FromNode(aContent);
if (!image) {
return;
}
ResponsiveImageSelector* selector = image->GetResponsiveImageSelector();
if (!selector) {
return;
}
double density = selector->GetSelectedImageDensity();
MOZ_ASSERT(density >= 0.0);
if (density == 1.0) {
return;
}
if (aSize.width) {
aSize.width = Some(NSToCoordRound(double(*aSize.width) / density));
}
if (aSize.height) {
aSize.height = Some(NSToCoordRound(double(*aSize.height) / density));
}
}
static IntrinsicSize ComputeIntrinsicSize(imgIContainer* aImage,
bool aUseMappedRatio,
nsImageFrame::Kind aKind,
const nsImageFrame& aFrame) {
const ComputedStyle& style = *aFrame.Style();
if (style.StyleDisplay()->IsContainSize()) {
return IntrinsicSize(0, 0);
}
nsSize size;
if (aImage && NS_SUCCEEDED(aImage->GetIntrinsicSize(&size))) {
IntrinsicSize intrinsicSize;
intrinsicSize.width = size.width == -1 ? Nothing() : Some(size.width);
intrinsicSize.height = size.height == -1 ? Nothing() : Some(size.height);
if (aKind == nsImageFrame::Kind::ImageElement) {
ScaleIntrinsicSizeForDensity(*aFrame.GetContent(), intrinsicSize);
}
return intrinsicSize;
}
if (aFrame.ShouldShowBrokenImageIcon()) {
nscoord edgeLengthToUse = nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
return IntrinsicSize(edgeLengthToUse, edgeLengthToUse);
}
if (aUseMappedRatio && style.StylePosition()->mAspectRatio != 0.0f) {
return IntrinsicSize();
}
return IntrinsicSize(0, 0);
}
// For compat reasons, see bug 1602047, we don't use the intrinsic ratio from
// width="" and height="" for images with no src attribute (no request).
//
// But we shouldn't get fooled by <img loading=lazy>. We do want to apply the
// ratio then...
bool nsImageFrame::ShouldUseMappedAspectRatio() const {
if (mKind != Kind::ImageElement) {
return true;
}
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
if (currentRequest) {
return true;
}
// TODO(emilio): Investigate the compat situation of the above check, maybe we
// can just check for empty src attribute or something...
auto* image = HTMLImageElement::FromNode(mContent);
return image && image->IsAwaitingLoadOrLazyLoading();
}
bool nsImageFrame::UpdateIntrinsicSize() {
IntrinsicSize oldIntrinsicSize = mIntrinsicSize;
mIntrinsicSize =
ComputeIntrinsicSize(mImage, ShouldUseMappedAspectRatio(), mKind, *this);
return mIntrinsicSize != oldIntrinsicSize;
}
static AspectRatio ComputeAspectRatio(imgIContainer* aImage,
bool aUseMappedRatio,
const nsImageFrame& aFrame) {
const ComputedStyle& style = *aFrame.Style();
if (style.StyleDisplay()->IsContainSize()) {
return AspectRatio();
}
if (aImage) {
if (Maybe<AspectRatio> fromImage = aImage->GetIntrinsicRatio()) {
return *fromImage;
}
}
if (aUseMappedRatio && style.StylePosition()->mAspectRatio != 0.0f) {
return AspectRatio(style.StylePosition()->mAspectRatio);
}
if (aFrame.ShouldShowBrokenImageIcon()) {
return AspectRatio(1.0f);
}
return AspectRatio();
}
bool nsImageFrame::UpdateIntrinsicRatio() {
AspectRatio oldIntrinsicRatio = mIntrinsicRatio;
mIntrinsicRatio =
ComputeAspectRatio(mImage, ShouldUseMappedAspectRatio(), *this);
return mIntrinsicRatio != oldIntrinsicRatio;
}
bool nsImageFrame::GetSourceToDestTransform(nsTransform2D& aTransform) {
// First, figure out destRect (the rect we're rendering into).
// NOTE: We use mComputedSize instead of just GetInnerArea()'s own size here,
// because GetInnerArea() might be smaller if we're fragmented, whereas
// mComputedSize has our full content-box size (which we need for
// ComputeObjectDestRect to work correctly).
nsRect constraintRect(GetInnerArea().TopLeft(), mComputedSize);
constraintRect.y -= GetContinuationOffset();
nsRect destRect = nsLayoutUtils::ComputeObjectDestRect(
constraintRect, mIntrinsicSize, mIntrinsicRatio, StylePosition());
// Set the translation components, based on destRect
// XXXbz does this introduce rounding errors because of the cast to
// float? Should we just manually add that stuff in every time
// instead?
aTransform.SetToTranslate(float(destRect.x), float(destRect.y));
// NOTE(emilio): This intrinsicSize is not the same as the layout intrinsic
// size (mIntrinsicSize), which can be scaled due to ResponsiveImageSelector,
// see ScaleIntrinsicSizeForDensity.
nsSize intrinsicSize;
if (!mImage || !NS_SUCCEEDED(mImage->GetIntrinsicSize(&intrinsicSize)) ||
intrinsicSize.IsEmpty()) {
return false;
}
aTransform.SetScale(float(destRect.width) / float(intrinsicSize.width),
float(destRect.height) / float(intrinsicSize.height));
return true;
}
// This function checks whether the given request is the current request for our
// mContent.
bool nsImageFrame::IsPendingLoad(imgIRequest* aRequest) const {
// Default to pending load in case of errors
if (mKind != Kind::ImageElement) {
MOZ_ASSERT(aRequest == mContentURLRequest);
return false;
}
nsCOMPtr<nsIImageLoadingContent> imageLoader(do_QueryInterface(mContent));
MOZ_ASSERT(imageLoader);
int32_t requestType = nsIImageLoadingContent::UNKNOWN_REQUEST;
imageLoader->GetRequestType(aRequest, &requestType);
return requestType != nsIImageLoadingContent::CURRENT_REQUEST;
}
nsRect nsImageFrame::SourceRectToDest(const nsIntRect& aRect) {
// When scaling the image, row N of the source image may (depending on
// the scaling function) be used to draw any row in the destination image
// between floor(F * (N-1)) and ceil(F * (N+1)), where F is the
// floating-point scaling factor. The same holds true for columns.
// So, we start by computing that bound without the floor and ceiling.
nsRect r(nsPresContext::CSSPixelsToAppUnits(aRect.x - 1),
nsPresContext::CSSPixelsToAppUnits(aRect.y - 1),
nsPresContext::CSSPixelsToAppUnits(aRect.width + 2),
nsPresContext::CSSPixelsToAppUnits(aRect.height + 2));
nsTransform2D sourceToDest;
if (!GetSourceToDestTransform(sourceToDest)) {
// Failed to generate transform matrix. Return our whole inner area,
// to be on the safe side (since this method is used for generating
// invalidation rects).
return GetInnerArea();
}
sourceToDest.TransformCoord(&r.x, &r.y, &r.width, &r.height);
// Now, round the edges out to the pixel boundary.
nscoord scale = nsPresContext::CSSPixelsToAppUnits(1);
nscoord right = r.x + r.width;
nscoord bottom = r.y + r.height;
r.x -= (scale + (r.x % scale)) % scale;
r.y -= (scale + (r.y % scale)) % scale;
r.width = right + ((scale - (right % scale)) % scale) - r.x;
r.height = bottom + ((scale - (bottom % scale)) % scale) - r.y;
return r;
}
// Note that we treat NS_EVENT_STATE_SUPPRESSED images as "OK". This means
// that we'll construct image frames for them as needed if their display is
// toggled from "none" (though we won't paint them, unless their visibility
// is changed too).
#define BAD_STATES (NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)
static bool ImageOk(EventStates aState) {
return !aState.HasAtLeastOneOfStates(BAD_STATES);
}
static bool HasAltText(const Element& aElement) {
// We always return some alternate text for <input>, see
// nsCSSFrameConstructor::GetAlternateTextFor.
if (aElement.IsHTMLElement(nsGkAtoms::input)) {
return true;
}
MOZ_ASSERT(aElement.IsHTMLElement(nsGkAtoms::img));
return aElement.HasNonEmptyAttr(nsGkAtoms::alt);
}
// Check if we want to use an image frame or just let the frame constructor make
// us into an inline.
/* static */
bool nsImageFrame::ShouldCreateImageFrameFor(const Element& aElement,
ComputedStyle& aStyle) {
if (ImageOk(aElement.State())) {
// Image is fine or loading; do the image frame thing
return true;
}
if (aStyle.StyleUIReset()->mMozForceBrokenImageIcon) {
return true;
}
// if our "do not show placeholders" pref is set, skip the icon
if (gIconLoad && gIconLoad->mPrefForceInlineAltText) {
return false;
}
if (!HasAltText(aElement)) {
return true;
}
if (aElement.OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks) {
// FIXME(emilio): We definitely don't reframe when this changes...
return HaveSpecifiedSize(aStyle.StylePosition());
}
return false;
}
void nsImageFrame::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aRect) {
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
return OnSizeAvailable(aRequest, image);
}
if (aType == imgINotificationObserver::FRAME_UPDATE) {
return OnFrameUpdate(aRequest, aRect);
}
if (aType == imgINotificationObserver::FRAME_COMPLETE) {
mFirstFrameComplete = true;
}
if (aType == imgINotificationObserver::IS_ANIMATED &&
mKind != Kind::ImageElement) {
nsLayoutUtils::RegisterImageRequest(PresContext(), mContentURLRequest,
&mContentURLRequestRegistered);
}
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
uint32_t imgStatus;
aRequest->GetImageStatus(&imgStatus);
nsresult status =
imgStatus & imgIRequest::STATUS_ERROR ? NS_ERROR_FAILURE : NS_OK;
return OnLoadComplete(aRequest, status);
}
}
void nsImageFrame::OnSizeAvailable(imgIRequest* aRequest,
imgIContainer* aImage) {
if (!aImage) {
return;
}
/* Get requested animation policy from the pres context:
* normal = 0
* one frame = 1
* one loop = 2
*/
aImage->SetAnimationMode(PresContext()->ImageAnimationMode());
if (IsPendingLoad(aRequest)) {
// We don't care
return;
}
UpdateImage(aRequest, aImage);
}
void nsImageFrame::UpdateImage(imgIRequest* aRequest, imgIContainer* aImage) {
MOZ_ASSERT(aRequest);
if (SizeIsAvailable(aRequest)) {
// This is valid and for the current request, so update our stored image
// container, orienting according to our style.
mImage = nsLayoutUtils::OrientImage(aImage,
StyleVisibility()->mImageOrientation);
MOZ_ASSERT(mImage);
} else {
// We no longer have a valid image, so release our stored image container.
mImage = mPrevImage = nullptr;
}
// NOTE(emilio): Intentionally using `|` instead of `||` to avoid
// short-circuiting.
bool intrinsicSizeChanged = UpdateIntrinsicSize() | UpdateIntrinsicRatio();
if (!GotInitialReflow()) {
return;
}
// We're going to need to repaint now either way.
InvalidateFrame();
if (intrinsicSizeChanged) {
// Now we need to reflow if we have an unconstrained size and have
// already gotten the initial reflow.
if (!(mState & IMAGE_SIZECONSTRAINED)) {
#ifdef ACCESSIBILITY
if (nsAccessibilityService* accService = GetAccService()) {
accService->NotifyOfImageSizeAvailable(PresShell(), mContent);
}
#endif
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
NS_FRAME_IS_DIRTY);
} else if (PresShell()->IsActive()) {
// We've already gotten the initial reflow, and our size hasn't changed,
// so we're ready to request a decode.
MaybeDecodeForPredictedSize();
}
}
}
void nsImageFrame::OnFrameUpdate(imgIRequest* aRequest,
const nsIntRect* aRect) {
if (NS_WARN_IF(!aRect)) {
return;
}
if (!GotInitialReflow()) {
// Don't bother to do anything; we have a reflow coming up!
return;
}
if (mFirstFrameComplete && !StyleVisibility()->IsVisible()) {
return;
}
if (IsPendingLoad(aRequest)) {
// We don't care
return;
}
nsIntRect layerInvalidRect =
mImage ? mImage->GetImageSpaceInvalidationRect(*aRect) : *aRect;
if (layerInvalidRect.IsEqualInterior(GetMaxSizedIntRect())) {
// Invalidate our entire area.
InvalidateSelf(nullptr, nullptr);
return;
}
nsRect frameInvalidRect = SourceRectToDest(layerInvalidRect);
InvalidateSelf(&layerInvalidRect, &frameInvalidRect);
}
void nsImageFrame::InvalidateSelf(const nsIntRect* aLayerInvalidRect,
const nsRect* aFrameInvalidRect) {
// Check if WebRender has interacted with this frame. If it has
// we need to let it know that things have changed.
const auto type = DisplayItemType::TYPE_IMAGE;
const auto producerId =
mImage ? mImage->GetProducerId() : kContainerProducerID_Invalid;
if (WebRenderUserData::ProcessInvalidateForImage(this, type, producerId)) {
return;
}
InvalidateLayer(type, aLayerInvalidRect, aFrameInvalidRect);
if (!mFirstFrameComplete) {
InvalidateLayer(DisplayItemType::TYPE_ALT_FEEDBACK, aLayerInvalidRect,
aFrameInvalidRect);
}
}
void nsImageFrame::OnLoadComplete(imgIRequest* aRequest, nsresult aStatus) {
NotifyNewCurrentRequest(aRequest, aStatus);
}
void nsImageFrame::ResponsiveContentDensityChanged() {
if (!GotInitialReflow()) {
return;
}
if (!mImage) {
return;
}
if (!UpdateIntrinsicSize() && !UpdateIntrinsicRatio()) {
return;
}
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
NS_FRAME_IS_DIRTY);
}
void nsImageFrame::NotifyNewCurrentRequest(imgIRequest* aRequest,
nsresult aStatus) {
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
NS_ASSERTION(image || NS_FAILED(aStatus),
"Successful load with no container?");
UpdateImage(aRequest, image);
}
void nsImageFrame::MaybeDecodeForPredictedSize() {
// Check that we're ready to decode.
if (!mImage) {
return; // Nothing to do yet.
}
if (mComputedSize.IsEmpty()) {
return; // We won't draw anything, so no point in decoding.
}
if (GetVisibility() != Visibility::ApproximatelyVisible) {
return; // We're not visible, so don't decode.
}
// OK, we're ready to decode. Compute the scale to the screen...
mozilla::PresShell* presShell = PresContext()->PresShell();
LayoutDeviceToScreenScale2D resolutionToScreen(
presShell->GetCumulativeResolution() *
nsLayoutUtils::GetTransformToAncestorScaleExcludingAnimated(this));
// ...and this frame's content box...
const nsPoint offset =
GetOffsetToCrossDoc(nsLayoutUtils::GetReferenceFrame(this));
const nsRect frameContentBox = GetInnerArea() + offset;
// ...and our predicted dest rect...
const int32_t factor = PresContext()->AppUnitsPerDevPixel();
const LayoutDeviceRect destRect = LayoutDeviceRect::FromAppUnits(
PredictedDestRect(frameContentBox), factor);
// ...and use them to compute our predicted size in screen pixels.
const ScreenSize predictedScreenSize = destRect.Size() * resolutionToScreen;
const ScreenIntSize predictedScreenIntSize =
RoundedToInt(predictedScreenSize);
if (predictedScreenIntSize.IsEmpty()) {
return;
}
// Determine the optimal image size to use.
uint32_t flags = imgIContainer::FLAG_HIGH_QUALITY_SCALING |
imgIContainer::FLAG_ASYNC_NOTIFY;
SamplingFilter samplingFilter =
nsLayoutUtils::GetSamplingFilterForFrame(this);
gfxSize gfxPredictedScreenSize =
gfxSize(predictedScreenIntSize.width, predictedScreenIntSize.height);
nsIntSize predictedImageSize = mImage->OptimalImageSizeForDest(
gfxPredictedScreenSize, imgIContainer::FRAME_CURRENT, samplingFilter,
flags);
// Request a decode.
mImage->RequestDecodeForSize(predictedImageSize, flags);
}
nsRect nsImageFrame::PredictedDestRect(const nsRect& aFrameContentBox) {
// Note: To get the "dest rect", we have to provide the "constraint rect"
// (which is the content-box, with the effects of fragmentation undone).
nsRect constraintRect(aFrameContentBox.TopLeft(), mComputedSize);
constraintRect.y -= GetContinuationOffset();
return nsLayoutUtils::ComputeObjectDestRect(constraintRect, mIntrinsicSize,
mIntrinsicRatio, StylePosition());
}
void nsImageFrame::EnsureIntrinsicSizeAndRatio() {
if (StyleDisplay()->IsContainSize()) {
// If we have 'contain:size', then our intrinsic size and ratio are 0,0
// regardless of what our underlying image may think.
mIntrinsicSize = IntrinsicSize(0, 0);
mIntrinsicRatio = AspectRatio();
return;
}
// If mIntrinsicSize.width and height are 0, then we need to update from the
// image container.
if (mIntrinsicSize != IntrinsicSize(0, 0)) {
return;
}
UpdateIntrinsicSize();
UpdateIntrinsicRatio();
}
LogicalSize nsImageFrame::ComputeSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorder, const LogicalSize& aPadding,
ComputeSizeFlags aFlags) {
EnsureIntrinsicSizeAndRatio();
return ComputeSizeWithIntrinsicDimensions(
aRenderingContext, aWM, mIntrinsicSize, mIntrinsicRatio, aCBSize, aMargin,
aBorder, aPadding, aFlags);
}
// XXXdholbert This function's clients should probably just be calling
// GetContentRectRelativeToSelf() directly.
nsRect nsImageFrame::GetInnerArea() const {
return GetContentRectRelativeToSelf();
}
Element* nsImageFrame::GetMapElement() const {
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
return imageLoader ? static_cast<nsImageLoadingContent*>(imageLoader.get())
->FindImageMap()
: nullptr;
}
// get the offset into the content area of the image where aImg starts if it is
// a continuation.
nscoord nsImageFrame::GetContinuationOffset() const {
nscoord offset = 0;
for (nsIFrame* f = GetPrevInFlow(); f; f = f->GetPrevInFlow()) {
offset += f->GetContentRect().height;
}
NS_ASSERTION(offset >= 0, "bogus GetContentRect");
return offset;
}
nscoord nsImageFrame::GetMinISize(gfxContext* aRenderingContext) {
// XXX The caller doesn't account for constraints of the block-size,
// min-block-size, and max-block-size properties.
DebugOnly<nscoord> result;
DISPLAY_MIN_INLINE_SIZE(this, result);
EnsureIntrinsicSizeAndRatio();
const auto& iSize = GetWritingMode().IsVertical() ? mIntrinsicSize.height
: mIntrinsicSize.width;
return iSize.valueOr(0);
}
nscoord nsImageFrame::GetPrefISize(gfxContext* aRenderingContext) {
// XXX The caller doesn't account for constraints of the block-size,
// min-block-size, and max-block-size properties.
DebugOnly<nscoord> result;
DISPLAY_PREF_INLINE_SIZE(this, result);
EnsureIntrinsicSizeAndRatio();
const auto& iSize = GetWritingMode().IsVertical() ? mIntrinsicSize.height
: mIntrinsicSize.width;
// convert from normal twips to scaled twips (printing...)
return iSize.valueOr(0);
}
void nsImageFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsImageFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_FRAME_TRACE(
NS_FRAME_TRACE_CALLS,
("enter nsImageFrame::Reflow: availSize=%d,%d",
aReflowInput.AvailableWidth(), aReflowInput.AvailableHeight()));
MOZ_ASSERT(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
// see if we have a frozen size (i.e. a fixed width and height)
if (!SizeDependsOnIntrinsicSize(aReflowInput)) {
AddStateBits(IMAGE_SIZECONSTRAINED);
} else {
RemoveStateBits(IMAGE_SIZECONSTRAINED);
}
mComputedSize =
nsSize(aReflowInput.ComputedWidth(), aReflowInput.ComputedHeight());
aMetrics.Width() = mComputedSize.width;
aMetrics.Height() = mComputedSize.height;
// add borders and padding
aMetrics.Width() += aReflowInput.ComputedPhysicalBorderPadding().LeftRight();
aMetrics.Height() += aReflowInput.ComputedPhysicalBorderPadding().TopBottom();
if (GetPrevInFlow()) {
aMetrics.Width() = GetPrevInFlow()->GetSize().width;
nscoord y = GetContinuationOffset();
aMetrics.Height() -= y + aReflowInput.ComputedPhysicalBorderPadding().top;
aMetrics.Height() = std::max(0, aMetrics.Height());
}
// we have to split images if we are:
// in Paginated mode, we need to have a constrained height, and have a height
// larger than our available height
uint32_t loadStatus = imgIRequest::STATUS_NONE;
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
currentRequest->GetImageStatus(&loadStatus);
}
if (aPresContext->IsPaginated() &&
((loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) ||
(mState & IMAGE_SIZECONSTRAINED)) &&
NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableHeight() &&
aMetrics.Height() > aReflowInput.AvailableHeight()) {
// our desired height was greater than 0, so to avoid infinite
// splitting, use 1 pixel as the min
aMetrics.Height() = std::max(nsPresContext::CSSPixelsToAppUnits(1),
aReflowInput.AvailableHeight());
aStatus.SetIncomplete();
}
aMetrics.SetOverflowAreasToDesiredBounds();
bool imageOK =
mKind != Kind::ImageElement || ImageOk(mContent->AsElement()->State());
// Determine if the size is available
bool haveSize = false;
if (loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) {
haveSize = true;
}
if (!imageOK || !haveSize) {
nsRect altFeedbackSize(
0, 0,
nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + 2 * (ICON_PADDING + ALT_BORDER_WIDTH)),
nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + 2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
// We include the altFeedbackSize in our visual overflow, but not in our
// scrollable overflow, since it doesn't really need to be scrolled to
// outside the image.
static_assert(eOverflowType_LENGTH == 2, "Unknown overflow types?");
nsRect& visualOverflow = aMetrics.VisualOverflow();
visualOverflow.UnionRect(visualOverflow, altFeedbackSize);
} else if (PresShell()->IsActive()) {
// We've just reflowed and we should have an accurate size, so we're ready
// to request a decode.
MaybeDecodeForPredictedSize();
}
FinishAndStoreOverflow(&aMetrics, aReflowInput.mStyleDisplay);
if ((GetStateBits() & NS_FRAME_FIRST_REFLOW) && !mReflowCallbackPosted) {
mReflowCallbackPosted = true;
PresShell()->PostReflowCallback(this);
}
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("exit nsImageFrame::Reflow: size=%d,%d",
aMetrics.Width(), aMetrics.Height()));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
}
bool nsImageFrame::ReflowFinished() {
mReflowCallbackPosted = false;
// XXX(seth): We don't need this. The purpose of updating visibility
// synchronously is to ensure that animated images start animating
// immediately. In the short term, however,
// nsImageLoadingContent::OnUnlockedDraw() is enough to ensure that
// animations start as soon as the image is painted for the first time, and in
// the long term we want to update visibility information from the display
// list whenever we paint, so we don't actually need to do this. However, to
// avoid behavior changes during the transition from the old image visibility
// code, we'll leave it in for now.
UpdateVisibilitySynchronously();
return false;
}
void nsImageFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
// Computes the width of the specified string. aMaxWidth specifies the maximum
// width available. Once this limit is reached no more characters are measured.
// The number of characters that fit within the maximum width are returned in
// aMaxFit. NOTE: it is assumed that the fontmetrics have already been selected
// into the rendering context before this is called (for performance). MMP
nscoord nsImageFrame::MeasureString(const char16_t* aString, int32_t aLength,
nscoord aMaxWidth, uint32_t& aMaxFit,
gfxContext& aContext,
nsFontMetrics& aFontMetrics) {
nscoord totalWidth = 0;
aFontMetrics.SetTextRunRTL(false);
nscoord spaceWidth = aFontMetrics.SpaceWidth();
aMaxFit = 0;
while (aLength > 0) {
// Find the next place we can line break
uint32_t len = aLength;
bool trailingSpace = false;
for (int32_t i = 0; i < aLength; i++) {
if (dom::IsSpaceCharacter(aString[i]) && (i > 0)) {
len = i; // don't include the space when measuring
trailingSpace = true;
break;
}
}
// Measure this chunk of text, and see if it fits
nscoord width = nsLayoutUtils::AppUnitWidthOfStringBidi(
aString, len, this, aFontMetrics, aContext);
bool fits = (totalWidth + width) <= aMaxWidth;
// If it fits on the line, or it's the first word we've processed then
// include it
if (fits || (0 == totalWidth)) {
// New piece fits
totalWidth += width;
// If there's a trailing space then see if it fits as well
if (trailingSpace) {
if ((totalWidth + spaceWidth) <= aMaxWidth) {
totalWidth += spaceWidth;
} else {
// Space won't fit. Leave it at the end but don't include it in
// the width
fits = false;
}
len++;
}
aMaxFit += len;
aString += len;
aLength -= len;
}
if (!fits) {
break;
}
}
return totalWidth;
}
// Formats the alt-text to fit within the specified rectangle. Breaks lines
// between words if a word would extend past the edge of the rectangle
void nsImageFrame::DisplayAltText(nsPresContext* aPresContext,
gfxContext& aRenderingContext,
const nsString& aAltText,
const nsRect& aRect) {
// Set font and color
aRenderingContext.SetColor(
sRGBColor::FromABGR(StyleText()->mColor.ToColor()));
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
// Format the text to display within the formatting rect
nscoord maxAscent = fm->MaxAscent();
nscoord maxDescent = fm->MaxDescent();
nscoord lineHeight = fm->MaxHeight(); // line-relative, so an x-coordinate
// length if writing mode is vertical
WritingMode wm = GetWritingMode();
bool isVertical = wm.IsVertical();
fm->SetVertical(isVertical);
fm->SetTextOrientation(StyleVisibility()->mTextOrientation);
// XXX It would be nice if there was a way to have the font metrics tell
// use where to break the text given a maximum width. At a minimum we need
// to be able to get the break character...
const char16_t* str = aAltText.get();
int32_t strLen = aAltText.Length();
nsPoint pt = wm.IsVerticalRL() ? aRect.TopRight() - nsPoint(lineHeight, 0)
: aRect.TopLeft();
nscoord iSize = isVertical ? aRect.height : aRect.width;
if (!aPresContext->BidiEnabled() && HasRTLChars(aAltText)) {
aPresContext->SetBidiEnabled();
}
// Always show the first line, even if we have to clip it below
bool firstLine = true;
while (strLen > 0) {
if (!firstLine) {
// If we've run out of space, break out of the loop
if ((!isVertical && (pt.y + maxDescent) >= aRect.YMost()) ||
(wm.IsVerticalRL() && (pt.x + maxDescent < aRect.x)) ||
(wm.IsVerticalLR() && (pt.x + maxDescent >= aRect.XMost()))) {
break;
}
}
// Determine how much of the text to display on this line
uint32_t maxFit; // number of characters that fit
nscoord strWidth =
MeasureString(str, strLen, iSize, maxFit, aRenderingContext, *fm);
// Display the text
nsresult rv = NS_ERROR_FAILURE;
if (aPresContext->BidiEnabled()) {
nsBidiDirection dir;
nscoord x, y;
if (isVertical) {
x = pt.x + maxDescent;
if (wm.IsBidiLTR()) {
y = aRect.y;
dir = NSBIDI_LTR;
} else {
y = aRect.YMost() - strWidth;
dir = NSBIDI_RTL;
}
} else {
y = pt.y + maxAscent;
if (wm.IsBidiLTR()) {
x = aRect.x;
dir = NSBIDI_LTR;
} else {
x = aRect.XMost() - strWidth;
dir = NSBIDI_RTL;
}
}
rv = nsBidiPresUtils::RenderText(
str, maxFit, dir, aPresContext, aRenderingContext,
aRenderingContext.GetDrawTarget(), *fm, x, y);
}
if (NS_FAILED(rv)) {
nsLayoutUtils::DrawUniDirString(str, maxFit,
isVertical
? nsPoint(pt.x + maxDescent, pt.y)
: nsPoint(pt.x, pt.y + maxAscent),
*fm, aRenderingContext);
}
// Move to the next line
str += maxFit;
strLen -= maxFit;
if (wm.IsVerticalRL()) {
pt.x -= lineHeight;
} else if (wm.IsVerticalLR()) {
pt.x += lineHeight;
} else {
pt.y += lineHeight;
}
firstLine = false;
}
}
struct nsRecessedBorder : public nsStyleBorder {
nsRecessedBorder(nscoord aBorderWidth, nsPresContext* aPresContext)
: nsStyleBorder(*aPresContext->Document()) {
for (const auto side : mozilla::AllPhysicalSides()) {
BorderColorFor(side) = StyleColor::Black();
mBorder.Side(side) = aBorderWidth;
// Note: use SetBorderStyle here because we want to affect
// mComputedBorder
SetBorderStyle(side, StyleBorderStyle::Inset);
}
}
};
class nsDisplayAltFeedback final : public nsPaintedDisplayItem {
public:
nsDisplayAltFeedback(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {}
nsDisplayItemGeometry* AllocateGeometry(
nsDisplayListBuilder* aBuilder) final {
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const final {
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry,
aInvalidRegion);
}
nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) const final {
*aSnap = false;
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}
void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) final {
// Always sync decode, because these icons are UI, and since they're not
// discardable we'll pay the price of sync decoding at most once.
uint32_t flags = imgIContainer::FLAG_SYNC_DECODE;
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
ImgDrawResult result =
f->DisplayAltFeedback(*aCtx, GetPaintRect(), ToReferenceFrame(), flags);
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) final {
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
ImgDrawResult result = f->DisplayAltFeedbackWithoutLayer(
this, aBuilder, aResources, aSc, aManager, aDisplayListBuilder,
ToReferenceFrame(), flags);
return result == ImgDrawResult::SUCCESS;
}
NS_DISPLAY_DECL_NAME("AltFeedback", TYPE_ALT_FEEDBACK)
};
ImgDrawResult nsImageFrame::DisplayAltFeedback(gfxContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt, uint32_t aFlags) {
// We should definitely have a gIconLoad here.
MOZ_ASSERT(gIconLoad, "How did we succeed in Init then?");
// Whether we draw the broken or loading icon.
bool isLoading =
mKind != Kind::ImageElement || ImageOk(mContent->AsElement()->State());
// Calculate the inner area
nsRect inner = GetInnerArea() + aPt;
// Display a recessed one pixel border
nscoord borderEdgeWidth =
nsPresContext::CSSPixelsToAppUnits(ALT_BORDER_WIDTH);
// if inner area is empty, then make it big enough for at least the icon
if (inner.IsEmpty()) {
inner.SizeTo(2 * (nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)),
2 * (nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)));
}
// Make sure we have enough room to actually render the border within
// our frame bounds
if ((inner.width < 2 * borderEdgeWidth) ||
(inner.height < 2 * borderEdgeWidth)) {
return ImgDrawResult::SUCCESS;
}
// Paint the border
if (!isLoading || gIconLoad->mPrefShowLoadingPlaceholder) {
nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext());
// Assert that we're not drawing a border-image here; if we were, we
// couldn't ignore the ImgDrawResult that PaintBorderWithStyleBorder
// returns.
MOZ_ASSERT(recessedBorder.mBorderImageSource.IsNone());
Unused << nsCSSRendering::PaintBorderWithStyleBorder(
PresContext(), aRenderingContext, this, inner, inner, recessedBorder,
mComputedStyle, PaintBorderFlags::SyncDecodeImages);
}
// Adjust the inner rect to account for the one pixel recessed border,
// and a six pixel padding on each edge
inner.Deflate(
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH),
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH));
if (inner.IsEmpty()) {
return ImgDrawResult::SUCCESS;
}
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
// Clip so we don't render outside the inner rect
aRenderingContext.Save();
aRenderingContext.Clip(NSRectToSnappedRect(
inner, PresContext()->AppUnitsPerDevPixel(), *drawTarget));
ImgDrawResult result = ImgDrawResult::NOT_READY;
// Check if we should display image placeholders
if (!ShouldShowBrokenImageIcon() || !gIconLoad->mPrefShowPlaceholders ||
(isLoading && !gIconLoad->mPrefShowLoadingPlaceholder)) {
result = ImgDrawResult::SUCCESS;
} else {
nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE);
imgIRequest* request = isLoading ? nsImageFrame::gIconLoad->mLoadingImage
: nsImageFrame::gIconLoad->mBrokenImage;
// If we weren't previously displaying an icon, register ourselves
// as an observer for load and animation updates and flag that we're
// doing so now.
if (request && !mDisplayingIcon) {
gIconLoad->AddIconObserver(this);
mDisplayingIcon = true;
}
WritingMode wm = GetWritingMode();
bool flushRight = wm.IsPhysicalRTL();
// If the icon in question is loaded, draw it.
uint32_t imageStatus = 0;
if (request) request->GetImageStatus(&imageStatus);
if (imageStatus & imgIRequest::STATUS_LOAD_COMPLETE &&
!(imageStatus & imgIRequest::STATUS_ERROR)) {
nsCOMPtr<imgIContainer> imgCon;
request->GetImage(getter_AddRefs(imgCon));
MOZ_ASSERT(imgCon, "Load complete, but no image container?");
nsRect dest(flushRight ? inner.XMost() - size : inner.x, inner.y, size,
size);
result = nsLayoutUtils::DrawSingleImage(
aRenderingContext, PresContext(), imgCon,
nsLayoutUtils::GetSamplingFilterForFrame(this), dest, aDirtyRect,
/* no SVGImageContext */ Nothing(), aFlags);
}
// If we could not draw the icon, just draw some graffiti in the mean time.
if (result == ImgDrawResult::NOT_READY) {
ColorPattern color(ToDeviceColor(sRGBColor(1.f, 0.f, 0.f, 1.f)));
nscoord iconXPos = flushRight ? inner.XMost() - size : inner.x;
// stroked rect:
nsRect rect(iconXPos, inner.y, size, size);
Rect devPxRect = ToRect(nsLayoutUtils::RectToGfxRect(
rect, PresContext()->AppUnitsPerDevPixel()));
drawTarget->StrokeRect(devPxRect, color);
// filled circle in bottom right quadrant of stroked rect:
nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2);
rect = nsRect(iconXPos + size / 2, inner.y + size / 2, size / 2 - twoPX,
size / 2 - twoPX);
devPxRect = ToRect(nsLayoutUtils::RectToGfxRect(
rect, PresContext()->AppUnitsPerDevPixel()));
RefPtr<PathBuilder> builder = drawTarget->CreatePathBuilder();
AppendEllipseToPath(builder, devPxRect.Center(), devPxRect.Size());
RefPtr<Path> ellipse = builder->Finish();
drawTarget->Fill(ellipse, color);
}
// Reduce the inner rect by the width of the icon, and leave an
// additional ICON_PADDING pixels for padding
int32_t paddedIconSize =
nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING);
if (wm.IsVertical()) {
inner.y += paddedIconSize;
inner.height -= paddedIconSize;
} else {
if (!flushRight) {
inner.x += paddedIconSize;
}
inner.width -= paddedIconSize;
}
}
// If there's still room, display the alt-text
if (!inner.IsEmpty()) {
nsAutoString altText;
nsCSSFrameConstructor::GetAlternateTextFor(
mContent->AsElement(), mContent->NodeInfo()->NameAtom(), altText);
DisplayAltText(PresContext(), aRenderingContext, altText, inner);
}
aRenderingContext.Restore();
return result;
}
ImgDrawResult nsImageFrame::DisplayAltFeedbackWithoutLayer(
nsDisplayItem* aItem, mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder, nsPoint aPt, uint32_t aFlags) {
// We should definitely have a gIconLoad here.
MOZ_ASSERT(gIconLoad, "How did we succeed in Init then?");
// Whether we draw the broken or loading icon.
bool isLoading =
mKind != Kind::ImageElement || ImageOk(mContent->AsElement()->State());
// Calculate the inner area
nsRect inner = GetInnerArea() + aPt;
// Display a recessed one pixel border
nscoord borderEdgeWidth =
nsPresContext::CSSPixelsToAppUnits(ALT_BORDER_WIDTH);
// if inner area is empty, then make it big enough for at least the icon
if (inner.IsEmpty()) {
inner.SizeTo(2 * (nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)),
2 * (nsPresContext::CSSPixelsToAppUnits(
ICON_SIZE + ICON_PADDING + ALT_BORDER_WIDTH)));
}
// Make sure we have enough room to actually render the border within
// our frame bounds
if ((inner.width < 2 * borderEdgeWidth) ||
(inner.height < 2 * borderEdgeWidth)) {
return ImgDrawResult::SUCCESS;
}
// If the TextDrawTarget requires fallback we need to rollback everything we
// may have added to the display list, but we don't find that out until the
// end.
bool textDrawResult = true;
class AutoSaveRestore {
public:
explicit AutoSaveRestore(mozilla::wr::DisplayListBuilder& aBuilder,
bool& aTextDrawResult)
: mBuilder(aBuilder), mTextDrawResult(aTextDrawResult) {
mBuilder.Save();
}
~AutoSaveRestore() {
// If we have to use fallback for the text restore the builder and remove
// anything else we added to the display list, we need to use fallback.
if (mTextDrawResult) {
mBuilder.ClearSave();
} else {
mBuilder.Restore();
}
}
private:
mozilla::wr::DisplayListBuilder& mBuilder;
bool& mTextDrawResult;
};
AutoSaveRestore autoSaveRestore(aBuilder, textDrawResult);
// Paint the border
if (!isLoading || gIconLoad->mPrefShowLoadingPlaceholder) {
nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext());
// Assert that we're not drawing a border-image here; if we were, we
// couldn't ignore the ImgDrawResult that PaintBorderWithStyleBorder
// returns.
MOZ_ASSERT(recessedBorder.mBorderImageSource.IsNone());
nsRect rect = nsRect(aPt, GetSize());
Unused << nsCSSRendering::CreateWebRenderCommandsForBorderWithStyleBorder(
aItem, this, rect, aBuilder, aResources, aSc, aManager,
aDisplayListBuilder, recessedBorder);
}
// Adjust the inner rect to account for the one pixel recessed border,
// and a six pixel padding on each edge
inner.Deflate(
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH),
nsPresContext::CSSPixelsToAppUnits(ICON_PADDING + ALT_BORDER_WIDTH));
if (inner.IsEmpty()) {
return ImgDrawResult::SUCCESS;
}
// Clip to this rect so we don't render outside the inner rect
LayoutDeviceRect bounds = LayoutDeviceRect::FromAppUnits(
inner, PresContext()->AppUnitsPerDevPixel());
auto wrBounds = wr::ToLayoutRect(bounds);
// Check if we should display image placeholders
if (ShouldShowBrokenImageIcon() && gIconLoad->mPrefShowPlaceholders &&
(!isLoading || gIconLoad->mPrefShowLoadingPlaceholder)) {
ImgDrawResult result = ImgDrawResult::NOT_READY;
nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE);
imgIRequest* request = isLoading ? nsImageFrame::gIconLoad->mLoadingImage
: nsImageFrame::gIconLoad->mBrokenImage;
// If we weren't previously displaying an icon, register ourselves
// as an observer for load and animation updates and flag that we're
// doing so now.
if (request && !mDisplayingIcon) {
gIconLoad->AddIconObserver(this);
mDisplayingIcon = true;
}
WritingMode wm = GetWritingMode();
const bool flushRight = wm.IsPhysicalRTL();
// If the icon in question is loaded, draw it.
uint32_t imageStatus = 0;
if (request) request->GetImageStatus(&imageStatus);
if (imageStatus & imgIRequest::STATUS_LOAD_COMPLETE &&
!(imageStatus & imgIRequest::STATUS_ERROR)) {
nsCOMPtr<imgIContainer> imgCon;
request->GetImage(getter_AddRefs(imgCon));
MOZ_ASSERT(imgCon, "Load complete, but no image container?");
nsRect dest(flushRight ? inner.XMost() - size : inner.x, inner.y, size,
size);
const int32_t factor = PresContext()->AppUnitsPerDevPixel();
LayoutDeviceRect destRect(LayoutDeviceRect::FromAppUnits(dest, factor));
Maybe<SVGImageContext> svgContext;
IntSize decodeSize =
nsLayoutUtils::ComputeImageContainerDrawingParameters(
imgCon, this, destRect, aSc, aFlags, svgContext);
RefPtr<ImageContainer> container;
result = imgCon->GetImageContainerAtSize(aManager->LayerManager(),
decodeSize, svgContext, aFlags,
getter_AddRefs(container));
if (container) {
bool wrResult = aManager->CommandBuilder().PushImage(
aItem, container, aBuilder, aResources, aSc, destRect, bounds);
result &= wrResult ? ImgDrawResult::SUCCESS : ImgDrawResult::NOT_READY;
} else {
// We don't use &= here because we want the result to be NOT_READY so
// the next block executes.
result = ImgDrawResult::NOT_READY;
}
}
// If we could not draw the icon, just draw some graffiti in the mean time.
if (result == ImgDrawResult::NOT_READY) {
auto color = wr::ColorF{1.0f, 0.0f, 0.0f, 1.0f};
bool isBackfaceVisible = !aItem->BackfaceIsHidden();
nscoord iconXPos = flushRight ? inner.XMost() - size : inner.x;
// stroked rect:
nsRect rect(iconXPos, inner.y, size, size);
auto devPxRect = LayoutDeviceRect::FromAppUnits(
rect, PresContext()->AppUnitsPerDevPixel());
auto dest = wr::ToLayoutRect(devPxRect);
auto borderWidths = wr::ToBorderWidths(1.0, 1.0, 1.0, 1.0);
wr::BorderSide side = {color, wr::BorderStyle::Solid};
wr::BorderSide sides[4] = {side, side, side, side};
Range<const wr::BorderSide> sidesRange(sides, 4);
aBuilder.PushBorder(dest, wrBounds, isBackfaceVisible, borderWidths,
sidesRange, wr::EmptyBorderRadius());
// filled circle in bottom right quadrant of stroked rect:
nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2);
rect = nsRect(iconXPos + size / 2, inner.y + size / 2, size / 2 - twoPX,
size / 2 - twoPX);
devPxRect = LayoutDeviceRect::FromAppUnits(
rect, PresContext()->AppUnitsPerDevPixel());
dest = wr::ToLayoutRect(devPxRect);
aBuilder.PushRoundedRect(dest, wrBounds, isBackfaceVisible, color);
}
// Reduce the inner rect by the width of the icon, and leave an
// additional ICON_PADDING pixels for padding
int32_t paddedIconSize =
nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING);
if (wm.IsVertical()) {
inner.y += paddedIconSize;
inner.height -= paddedIconSize;
} else {
if (!flushRight) {
inner.x += paddedIconSize;
}
inner.width -= paddedIconSize;
}
}
// Draw text
if (!inner.IsEmpty()) {
RefPtr<TextDrawTarget> textDrawer =
new TextDrawTarget(aBuilder, aResources, aSc, aManager, aItem, inner,
/* aCallerDoesSaveRestore = */ true);
RefPtr<gfxContext> captureCtx = gfxContext::CreateOrNull(textDrawer);
nsAutoString altText;
nsCSSFrameConstructor::GetAlternateTextFor(
mContent->AsElement(), mContent->NodeInfo()->NameAtom(), altText);
DisplayAltText(PresContext(), *captureCtx.get(), altText, inner);
textDrawer->TerminateShadows();
textDrawResult = !textDrawer->CheckHasUnsupportedFeatures();
}
// Purposely ignore local DrawResult because we handled it not being success
// already.
return textDrawResult ? ImgDrawResult::SUCCESS : ImgDrawResult::NOT_READY;
}
#ifdef DEBUG
static void PaintDebugImageMap(nsIFrame* aFrame, DrawTarget* aDrawTarget,
const nsRect& aDirtyRect, nsPoint aPt) {
nsImageFrame* f = static_cast<nsImageFrame*>(aFrame);
nsRect inner = f->GetInnerArea() + aPt;
gfxPoint devPixelOffset = nsLayoutUtils::PointToGfxPoint(
inner.TopLeft(), aFrame->PresContext()->AppUnitsPerDevPixel());
AutoRestoreTransform autoRestoreTransform(aDrawTarget);
aDrawTarget->SetTransform(
aDrawTarget->GetTransform().PreTranslate(ToPoint(devPixelOffset)));
f->GetImageMap()->Draw(aFrame, *aDrawTarget,
ColorPattern(ToDeviceColor(sRGBColor::OpaqueBlack())));
}
#endif
// We want to sync-decode in this case, as otherwise we either need to flash
// white while waiting to decode the new image, or paint the old image with a
// different aspect-ratio, which would be bad as it'd be stretched.
//
// See bug 1589955.
static bool OldImageHasDifferentRatio(const nsImageFrame& aFrame,
imgIContainer& aImage,
imgIContainer* aPrevImage) {
if (!aPrevImage || aPrevImage == &aImage) {
return false;
}
// If we don't depend on our intrinsic image size / ratio, we're good.
//
// FIXME(emilio): There's the case of the old image being painted
// intrinsically, and src and styles changing at the same time... Maybe we
// should keep track of the old GetPaintRect()'s ratio and the image's ratio,
// instead of checking this bit?
if (aFrame.HasAnyStateBits(IMAGE_SIZECONSTRAINED)) {
return false;
}
auto currentRatio = aFrame.GetComputedIntrinsicRatio();
// If we have an image, we need to have a current request.
// Same if we had an image.
const bool hasRequest = true;
MOZ_ASSERT(currentRatio == ComputeAspectRatio(&aImage, hasRequest, aFrame),
"aspect-ratio got out of sync during paint? How?");
auto oldRatio = ComputeAspectRatio(aPrevImage, hasRequest, aFrame);
return oldRatio != currentRatio;
}
void nsDisplayImage::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
MOZ_ASSERT(mImage);
auto* frame = static_cast<nsImageFrame*>(mFrame);
const bool oldImageIsDifferent =
OldImageHasDifferentRatio(*frame, *mImage, mPrevImage);
uint32_t flags = imgIContainer::FLAG_NONE;
if (aBuilder->ShouldSyncDecodeImages() || oldImageIsDifferent) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
if (aBuilder->IsPaintingToWindow()) {
flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
}
ImgDrawResult result = frame->PaintImage(*aCtx, ToReferenceFrame(),
GetPaintRect(), mImage, flags);
if (result == ImgDrawResult::NOT_READY ||
result == ImgDrawResult::INCOMPLETE ||
result == ImgDrawResult::TEMPORARY_ERROR) {
// If the current image failed to paint because it's still loading or
// decoding, try painting the previous image.
if (mPrevImage) {
result = frame->PaintImage(*aCtx, ToReferenceFrame(), GetPaintRect(),
mPrevImage, flags);
}
}
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
nsDisplayItemGeometry* nsDisplayImage::AllocateGeometry(
nsDisplayListBuilder* aBuilder) {
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void nsDisplayImage::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const {
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayImageContainer::ComputeInvalidationRegion(aBuilder, aGeometry,
aInvalidRegion);
}
already_AddRefed<imgIContainer> nsDisplayImage::GetImage() {
nsCOMPtr<imgIContainer> image = mImage;
return image.forget();
}
nsRect nsDisplayImage::GetDestRect() const {
bool snap = true;
const nsRect frameContentBox = GetBounds(&snap);
nsImageFrame* imageFrame = static_cast<nsImageFrame*>(mFrame);
return imageFrame->PredictedDestRect(frameContentBox);
}
LayerState nsDisplayImage::GetLayerState(
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
const ContainerLayerParameters& aParameters) {
if (!nsDisplayItem::ForceActiveLayers()) {
bool animated = false;
if (!StaticPrefs::layout_animated_image_layers_enabled() ||
mImage->GetType() != imgIContainer::TYPE_RASTER ||
NS_FAILED(mImage->GetAnimated(&animated)) || !animated) {
if (!aManager->IsCompositingCheap() ||
!nsLayoutUtils::GPUImageScalingEnabled()) {
return LayerState::LAYER_NONE;
}
}
if (!animated) {
int32_t imageWidth;
int32_t imageHeight;
mImage->GetWidth(&imageWidth);
mImage->GetHeight(&imageHeight);
NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!");
const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
const LayoutDeviceRect destRect =
LayoutDeviceRect::FromAppUnits(GetDestRect(), factor);
const LayerRect destLayerRect = destRect * aParameters.Scale();
// Calculate the scaling factor for the frame.
const gfxSize scale = gfxSize(destLayerRect.width / imageWidth,
destLayerRect.height / imageHeight);
// If we are not scaling at all, no point in separating this into a layer.
if (scale.width == 1.0f && scale.height == 1.0f) {
return LayerState::LAYER_NONE;
}
// If the target size is pretty small, no point in using a layer.
if (destLayerRect.width * destLayerRect.height < 64 * 64) {
return LayerState::LAYER_NONE;
}
}
}
if (!CanOptimizeToImageLayer(aManager, aBuilder)) {
return LayerState::LAYER_NONE;
}
// Image layer doesn't support draw focus ring for image map.
nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
if (f->HasImageMap()) {
return LayerState::LAYER_NONE;
}
return LayerState::LAYER_ACTIVE;
}
nsRegion nsDisplayImage::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
bool* aSnap) const {
*aSnap = false;
if (mImage && mImage->WillDrawOpaqueNow()) {
const nsRect frameContentBox = GetBounds(aSnap);
return GetDestRect().Intersect(frameContentBox);
}
return nsRegion();
}
already_AddRefed<Layer> nsDisplayImage::BuildLayer(
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
const ContainerLayerParameters& aParameters) {
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
if (aBuilder->ShouldSyncDecodeImages()) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
RefPtr<ImageContainer> container = mImage->GetImageContainer(aManager, flags);
if (!container || !container->HasCurrentImage()) {
return nullptr;
}
RefPtr<ImageLayer> layer = static_cast<ImageLayer*>(
aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
if (!layer) {
layer = aManager->CreateImageLayer();
if (!layer) return nullptr;
}
layer->SetContainer(container);
ConfigureLayer(layer, aParameters);
return layer.forget();
}
bool nsDisplayImage::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc, RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
if (!mImage) {
return false;
}
MOZ_ASSERT(mFrame->IsImageFrame() || mFrame->IsImageControlFrame());
// Image layer doesn't support draw focus ring for image map.
auto* frame = static_cast<nsImageFrame*>(mFrame);
if (frame->HasImageMap()) {
return false;
}
const bool oldImageIsDifferent =
OldImageHasDifferentRatio(*frame, *mImage, mPrevImage);
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
if (aDisplayListBuilder->ShouldSyncDecodeImages() || oldImageIsDifferent) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
if (aDisplayListBuilder->IsPaintingToWindow()) {
flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
}
const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
LayoutDeviceRect destRect(
LayoutDeviceRect::FromAppUnits(GetDestRect(), factor));
Maybe<SVGImageContext> svgContext;
IntSize decodeSize = nsLayoutUtils::ComputeImageContainerDrawingParameters(
mImage, mFrame, destRect, aSc, flags, svgContext);
RefPtr<layers::ImageContainer> container;
ImgDrawResult drawResult = mImage->GetImageContainerAtSize(
aManager->LayerManager(), decodeSize, svgContext, flags,
getter_AddRefs(container));
// While we got a container, it may not contain a fully decoded surface. If
// that is the case, and we have an image we were previously displaying which
// has a fully decoded surface, then we should prefer the previous image.
bool updatePrevImage = false;
switch (drawResult) {
case ImgDrawResult::NOT_READY:
case ImgDrawResult::INCOMPLETE:
case ImgDrawResult::TEMPORARY_ERROR:
if (mPrevImage && mPrevImage != mImage) {
RefPtr<ImageContainer> prevContainer;
drawResult = mPrevImage->GetImageContainerAtSize(
aManager->LayerManager(), decodeSize, svgContext, flags,
getter_AddRefs(prevContainer));
if (prevContainer && drawResult == ImgDrawResult::SUCCESS) {
container = std::move(prevContainer);
break;
}
// Previous image was unusable; we can forget about it.
updatePrevImage = true;
}
break;
case ImgDrawResult::NOT_SUPPORTED:
return false;
default:
updatePrevImage = mPrevImage != mImage;
break;
}
// The previous image was not used, and is different from the current image.
// We should forget about it. We need to update the frame as well because the
// display item may get recreated.
if (updatePrevImage) {
mPrevImage = mImage;
frame->mPrevImage = frame->mImage;
}
// If the image container is empty, we don't want to fallback. Any other
// failure will be due to resource constraints and fallback is unlikely to
// help us. Hence we can ignore the return value from PushImage.
if (container) {
aManager->CommandBuilder().PushImage(this, container, aBuilder, aResources,
aSc, destRect, destRect);
}
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, drawResult);
return true;
}
ImgDrawResult nsImageFrame::PaintImage(gfxContext& aRenderingContext,
nsPoint aPt, const nsRect& aDirtyRect,
imgIContainer* aImage, uint32_t aFlags) {
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
// Render the image into our content area (the area inside
// the borders and padding)
NS_ASSERTION(GetInnerArea().width == mComputedSize.width, "bad width");
// NOTE: We use mComputedSize instead of just GetInnerArea()'s own size here,
// because GetInnerArea() might be smaller if we're fragmented, whereas
// mComputedSize has our full content-box size (which we need for
// ComputeObjectDestRect to work correctly).
nsRect constraintRect(aPt + GetInnerArea().TopLeft(), mComputedSize);
constraintRect.y -= GetContinuationOffset();
nsPoint anchorPoint;
nsRect dest = nsLayoutUtils::ComputeObjectDestRect(
constraintRect, mIntrinsicSize, mIntrinsicRatio, StylePosition(),
&anchorPoint);
uint32_t flags = aFlags;
if (mForceSyncDecoding) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
Maybe<SVGImageContext> svgContext;
SVGImageContext::MaybeStoreContextPaint(svgContext, this, aImage);
ImgDrawResult result = nsLayoutUtils::DrawSingleImage(
aRenderingContext, PresContext(), aImage,
nsLayoutUtils::GetSamplingFilterForFrame(this), dest, aDirtyRect,
svgContext, flags, &anchorPoint);
if (nsImageMap* map = GetImageMap()) {
gfxPoint devPixelOffset = nsLayoutUtils::PointToGfxPoint(
dest.TopLeft(), PresContext()->AppUnitsPerDevPixel());
AutoRestoreTransform autoRestoreTransform(drawTarget);
drawTarget->SetTransform(
drawTarget->GetTransform().PreTranslate(ToPoint(devPixelOffset)));
// solid white stroke:
ColorPattern white(ToDeviceColor(sRGBColor::OpaqueWhite()));
map->Draw(this, *drawTarget, white);
// then dashed black stroke over the top:
ColorPattern black(ToDeviceColor(sRGBColor::OpaqueBlack()));
StrokeOptions strokeOptions;
nsLayoutUtils::InitDashPattern(strokeOptions, StyleBorderStyle::Dotted);
map->Draw(this, *drawTarget, black, strokeOptions);
}
if (result == ImgDrawResult::SUCCESS) {
mPrevImage = aImage;
} else if (result == ImgDrawResult::BAD_IMAGE) {
mPrevImage = nullptr;
}
return result;
}
already_AddRefed<imgIRequest> nsImageFrame::GetCurrentRequest() const {
if (mKind != Kind::ImageElement) {
return do_AddRef(mContentURLRequest);
}
MOZ_ASSERT(!mContentURLRequest);
nsCOMPtr<imgIRequest> request;
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
MOZ_ASSERT(imageLoader);
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(request));
return request.forget();
}
void nsImageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (!IsVisibleForPainting()) return;
DisplayBorderBackgroundOutline(aBuilder, aLists);
uint32_t clipFlags =
nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())
? 0
: DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT;
DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(
aBuilder, this, clipFlags);
if (mComputedSize.width != 0 && mComputedSize.height != 0) {
bool imageOK =
mKind != Kind::ImageElement || ImageOk(mContent->AsElement()->State());
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
// XXX(seth): The SizeIsAvailable check here should not be necessary - the
// intention is that a non-null mImage means we have a size, but there is
// currently some code that violates this invariant.
if (!imageOK || !mImage || !SizeIsAvailable(currentRequest)) {
// No image yet, or image load failed. Draw the alt-text and an icon
// indicating the status
aLists.Content()->AppendNewToTop<nsDisplayAltFeedback>(aBuilder, this);
// This image is visible (we are being asked to paint it) but it's not
// decoded yet. And we are not going to ask the image to draw, so this
// may be the only chance to tell it that it should decode.
if (currentRequest) {
uint32_t status = 0;
currentRequest->GetImageStatus(&status);
if (!(status & imgIRequest::STATUS_DECODE_COMPLETE)) {
MaybeDecodeForPredictedSize();
}
// Increase loading priority if the image is ready to be displayed.
if (!(status & imgIRequest::STATUS_LOAD_COMPLETE)) {
currentRequest->BoostPriority(imgIRequest::CATEGORY_DISPLAY);
}
}
} else {
aLists.Content()->AppendNewToTop<nsDisplayImage>(aBuilder, this, mImage,
mPrevImage);
// If we were previously displaying an icon, we're not anymore
if (mDisplayingIcon) {
gIconLoad->RemoveIconObserver(this);
mDisplayingIcon = false;
}
#ifdef DEBUG
if (GetShowFrameBorders() && GetImageMap()) {
aLists.Outlines()->AppendNewToTop<nsDisplayGeneric>(
aBuilder, this, PaintDebugImageMap, "DebugImageMap",
DisplayItemType::TYPE_DEBUG_IMAGE_MAP);
}
#endif
}
}
if (ShouldDisplaySelection()) {
DisplaySelectionOverlay(aBuilder, aLists.Content(),
nsISelectionDisplay::DISPLAY_IMAGES);
}
}
bool nsImageFrame::ShouldDisplaySelection() {
int16_t displaySelection = PresShell()->GetSelectionFlags();
if (!(displaySelection & nsISelectionDisplay::DISPLAY_IMAGES)) {
// no need to check the blue border, we cannot be drawn selected.
return false;
}
if (displaySelection != nsISelectionDisplay::DISPLAY_ALL) {
return true;
}
// If the image is currently resize target of the editor, don't draw the
// selection overlay.
HTMLEditor* htmlEditor = nsContentUtils::GetHTMLEditor(PresContext());
if (!htmlEditor) {
return true;
}
return htmlEditor->GetResizerTarget() != mContent;
}
nsImageMap* nsImageFrame::GetImageMap() {
if (!mImageMap) {
if (nsIContent* map = GetMapElement()) {
mImageMap = new nsImageMap();
mImageMap->Init(this, map);
}
}
return mImageMap;
}
bool nsImageFrame::IsServerImageMap() {
return mContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::ismap);
}
// Translate an point that is relative to our frame
// into a localized pixel coordinate that is relative to the
// content area of this frame (inside the border+padding).
void nsImageFrame::TranslateEventCoords(const nsPoint& aPoint,
nsIntPoint& aResult) {
nscoord x = aPoint.x;
nscoord y = aPoint.y;
// Subtract out border and padding here so that the coordinates are
// now relative to the content area of this frame.
nsRect inner = GetInnerArea();
x -= inner.x;
y -= inner.y;
aResult.x = nsPresContext::AppUnitsToIntCSSPixels(x);
aResult.y = nsPresContext::AppUnitsToIntCSSPixels(y);
}
bool nsImageFrame::GetAnchorHREFTargetAndNode(nsIURI** aHref, nsString& aTarget,
nsIContent** aNode) {
bool status = false;
aTarget.Truncate();
*aHref = nullptr;
*aNode = nullptr;
// Walk up the content tree, looking for an nsIDOMAnchorElement
for (nsIContent* content = mContent->GetParent(); content;
content = content->GetParent()) {
nsCOMPtr<dom::Link> link(do_QueryInterface(content));
if (link) {
nsCOMPtr<nsIURI> href = content->GetHrefURI();
if (href) {
href.forget(aHref);
}
status = (*aHref != nullptr);
RefPtr<HTMLAnchorElement> anchor = HTMLAnchorElement::FromNode(content);
if (anchor) {
anchor->GetTarget(aTarget);
}
NS_ADDREF(*aNode = content);
break;
}
}
return status;
}
nsresult nsImageFrame::GetContentForEvent(WidgetEvent* aEvent,
nsIContent** aContent) {
NS_ENSURE_ARG_POINTER(aContent);
nsIFrame* f = nsLayoutUtils::GetNonGeneratedAncestor(this);
if (f != this) {
return f->GetContentForEvent(aEvent, aContent);
}
// XXX We need to make this special check for area element's capturing the
// mouse due to bug 135040. Remove it once that's fixed.
nsIContent* capturingContent = aEvent->HasMouseEventMessage()
? PresShell::GetCapturingContent()
: nullptr;
if (capturingContent && capturingContent->GetPrimaryFrame() == this) {
*aContent = capturingContent;
NS_IF_ADDREF(*aContent);
return NS_OK;
}
if (nsImageMap* map = GetImageMap()) {
nsIntPoint p;
TranslateEventCoords(
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, RelativeTo{this}),
p);
nsCOMPtr<nsIContent> area = map->GetArea(p.x, p.y);
if (area) {
area.forget(aContent);
return NS_OK;
}
}
*aContent = GetContent();
NS_IF_ADDREF(*aContent);
return NS_OK;
}
// XXX what should clicks on transparent pixels do?
nsresult nsImageFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) {
NS_ENSURE_ARG_POINTER(aEventStatus);
if ((aEvent->mMessage == eMouseClick &&
aEvent->AsMouseEvent()->mButton == MouseButton::eLeft) ||
aEvent->mMessage == eMouseMove) {
nsImageMap* map = GetImageMap();
bool isServerMap = IsServerImageMap();
if (map || isServerMap) {
nsIntPoint p;
TranslateEventCoords(nsLayoutUtils::GetEventCoordinatesRelativeTo(
aEvent, RelativeTo{this}),
p);
bool inside = false;
// Even though client-side image map triggering happens
// through content, we need to make sure we're not inside
// (in case we deal with a case of both client-side and
// sever-side on the same image - it happens!)
if (nullptr != map) {
inside = !!map->GetArea(p.x, p.y);
}
if (!inside && isServerMap) {
// Server side image maps use the href in a containing anchor
// element to provide the basis for the destination url.
nsCOMPtr<nsIURI> uri;
nsAutoString target;
nsCOMPtr<nsIContent> anchorNode;
if (GetAnchorHREFTargetAndNode(getter_AddRefs(uri), target,
getter_AddRefs(anchorNode))) {
// XXX if the mouse is over/clicked in the border/padding area
// we should probably just pretend nothing happened. Nav4
// keeps the x,y coordinates positive as we do; IE doesn't
// bother. Both of them send the click through even when the
// mouse is over the border.
if (p.x < 0) p.x = 0;
if (p.y < 0) p.y = 0;
nsAutoCString spec;
nsresult rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
spec += nsPrintfCString("?%d,%d", p.x, p.y);
rv = NS_MutateURI(uri).SetSpec(spec).Finalize(uri);
NS_ENSURE_SUCCESS(rv, rv);
bool clicked = false;
if (aEvent->mMessage == eMouseClick && !aEvent->DefaultPrevented()) {
*aEventStatus = nsEventStatus_eConsumeDoDefault;
clicked = true;
}
nsContentUtils::TriggerLink(anchorNode, uri, target, clicked,
/* isTrusted */ true);
}
}
}
}
return nsAtomicContainerFrame::HandleEvent(aPresContext, aEvent,
aEventStatus);
}
Maybe<nsIFrame::Cursor> nsImageFrame::GetCursor(const nsPoint& aPoint) {
nsImageMap* map = GetImageMap();
if (!map) {
return nsFrame::GetCursor(aPoint);
}
nsIntPoint p;
TranslateEventCoords(aPoint, p);
HTMLAreaElement* area = map->GetArea(p.x, p.y);
if (!area) {
return nsFrame::GetCursor(aPoint);
}
// Use the cursor from the style of the *area* element.
RefPtr<ComputedStyle> areaStyle =
PresShell()->StyleSet()->ResolveStyleLazily(*area);
// This is one of the cases, like the <xul:tree> pseudo-style stuff, where we
// get styles out of the blue and expect to trigger image loads for those.
areaStyle->StartImageLoads(*PresContext()->Document());
StyleCursorKind kind = areaStyle->StyleUI()->mCursor.keyword;
if (kind == StyleCursorKind::Auto) {
kind = StyleCursorKind::Default;
}
return Some(Cursor{kind, AllowCustomCursorImage::Yes, std::move(areaStyle)});
}
nsresult nsImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
nsresult rv = nsAtomicContainerFrame::AttributeChanged(aNameSpaceID,
aAttribute, aModType);
if (NS_FAILED(rv)) {
return rv;
}
if (nsGkAtoms::alt == aAttribute) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::StyleChange,
NS_FRAME_IS_DIRTY);
}
return NS_OK;
}
void nsImageFrame::OnVisibilityChange(
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
if (mKind == Kind::ImageElement) {
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
if (aNewVisibility == Visibility::ApproximatelyVisible &&
PresShell()->IsActive()) {
MaybeDecodeForPredictedSize();
}
nsAtomicContainerFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
#ifdef DEBUG_FRAME_DUMP
nsresult nsImageFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(NS_LITERAL_STRING("ImageFrame"), aResult);
}
void nsImageFrame::List(FILE* out, const char* aPrefix,
ListFlags aFlags) const {
nsCString str;
ListGeneric(str, aPrefix, aFlags);
// output the img src url
if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
nsCOMPtr<nsIURI> uri;
currentRequest->GetURI(getter_AddRefs(uri));
nsAutoCString uristr;
uri->GetAsciiSpec(uristr);
str += nsPrintfCString(" [src=%s]", uristr.get());
}
fprintf_stderr(out, "%s\n", str.get());
}
#endif
nsIFrame::LogicalSides nsImageFrame::GetLogicalSkipSides(
const ReflowInput* aReflowInput) const {
LogicalSides skip(mWritingMode);
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone)) {
return skip;
}
if (nullptr != GetPrevInFlow()) {
skip |= eLogicalSideBitsBStart;
}
if (nullptr != GetNextInFlow()) {
skip |= eLogicalSideBitsBEnd;
}
return skip;
}
nsresult nsImageFrame::GetIntrinsicImageSize(nsSize& aSize) {
if (mIntrinsicSize.width && mIntrinsicSize.height) {
aSize.SizeTo(*mIntrinsicSize.width, *mIntrinsicSize.height);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
nsresult nsImageFrame::LoadIcon(const nsAString& aSpec,
nsPresContext* aPresContext,
imgRequestProxy** aRequest) {
MOZ_ASSERT(!aSpec.IsEmpty(), "What happened??");
nsCOMPtr<nsIURI> realURI;
SpecToURI(aSpec, getter_AddRefs(realURI));
RefPtr<imgLoader> il =
nsContentUtils::GetImgLoaderForDocument(aPresContext->Document());
nsCOMPtr<nsILoadGroup> loadGroup;
GetLoadGroup(aPresContext, getter_AddRefs(loadGroup));
// For icon loads, we don't need to merge with the loadgroup flags
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL;
nsContentPolicyType contentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE;
return il->LoadImage(
realURI, /* icon URI */
nullptr, /* initial document URI; this is only
relevant for cookies, so does not
apply to icons. */
nullptr, /* referrer (not relevant for icons) */
nullptr, /* principal (not relevant for icons) */
0, loadGroup, gIconLoad, nullptr, /* No context */
nullptr, /* Not associated with any particular document */
loadFlags, nullptr, contentPolicyType, EmptyString(),
false, /* aUseUrgentStartForChannel */
aRequest);
}
void nsImageFrame::GetDocumentCharacterSet(nsACString& aCharset) const {
if (mContent) {
NS_ASSERTION(mContent->GetComposedDoc(),
"Frame still alive after content removed from document!");
mContent->GetComposedDoc()->GetDocumentCharacterSet()->Name(aCharset);
}
}
void nsImageFrame::SpecToURI(const nsAString& aSpec, nsIURI** aURI) {
nsIURI* baseURI = nullptr;
if (mContent) {
baseURI = mContent->GetBaseURI();
}
nsAutoCString charset;
GetDocumentCharacterSet(charset);
NS_NewURI(aURI, aSpec, charset.IsEmpty() ? nullptr : charset.get(), baseURI);
}
void nsImageFrame::GetLoadGroup(nsPresContext* aPresContext,
nsILoadGroup** aLoadGroup) {
if (!aPresContext) return;
MOZ_ASSERT(nullptr != aLoadGroup, "null OUT parameter pointer");
mozilla::PresShell* presShell = aPresContext->GetPresShell();
if (!presShell) {
return;
}
Document* doc = presShell->GetDocument();
if (!doc) {
return;
}
*aLoadGroup = doc->GetDocumentLoadGroup().take();
}
nsresult nsImageFrame::LoadIcons(nsPresContext* aPresContext) {
NS_ASSERTION(!gIconLoad, "called LoadIcons twice");
NS_NAMED_LITERAL_STRING(loadingSrc,
"resource://gre-resources/loading-image.png");
NS_NAMED_LITERAL_STRING(brokenSrc,
"resource://gre-resources/broken-image.png");
gIconLoad = new IconLoad();
nsresult rv;
// create a loader and load the images
rv = LoadIcon(loadingSrc, aPresContext,
getter_AddRefs(gIconLoad->mLoadingImage));
if (NS_FAILED(rv)) {
return rv;
}
rv = LoadIcon(brokenSrc, aPresContext,
getter_AddRefs(gIconLoad->mBrokenImage));
if (NS_FAILED(rv)) {
return rv;
}
return rv;
}
NS_IMPL_ISUPPORTS(nsImageFrame::IconLoad, nsIObserver, imgINotificationObserver)
static const char* kIconLoadPrefs[] = {
"browser.display.force_inline_alttext",
"browser.display.show_image_placeholders",
"browser.display.show_loading_image_placeholder", nullptr};
nsImageFrame::IconLoad::IconLoad() {
// register observers
Preferences::AddStrongObservers(this, kIconLoadPrefs);
GetPrefs();
}
void nsImageFrame::IconLoad::Shutdown() {
Preferences::RemoveObservers(this, kIconLoadPrefs);
// in case the pref service releases us later
if (mLoadingImage) {
mLoadingImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
mLoadingImage = nullptr;
}
if (mBrokenImage) {
mBrokenImage->CancelAndForgetObserver(NS_ERROR_FAILURE);
mBrokenImage = nullptr;
}
}
NS_IMETHODIMP
nsImageFrame::IconLoad::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
NS_ASSERTION(!nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID),
"wrong topic");
#ifdef DEBUG
// assert |aData| is one of our prefs.
uint32_t i = 0;
for (; i < ArrayLength(kIconLoadPrefs); ++i) {
if (NS_ConvertASCIItoUTF16(kIconLoadPrefs[i]) == nsDependentString(aData))
break;
}
MOZ_ASSERT(i < ArrayLength(kIconLoadPrefs));
#endif
GetPrefs();
return NS_OK;
}
void nsImageFrame::IconLoad::GetPrefs() {
mPrefForceInlineAltText =
Preferences::GetBool("browser.display.force_inline_alttext");
mPrefShowPlaceholders =
Preferences::GetBool("browser.display.show_image_placeholders", true);
mPrefShowLoadingPlaceholder = Preferences::GetBool(
"browser.display.show_loading_image_placeholder", true);
}
nsresult nsImageFrame::RestartAnimation() {
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
if (currentRequest) {
bool deregister = false;
nsLayoutUtils::RegisterImageRequestIfAnimated(PresContext(), currentRequest,
&deregister);
}
return NS_OK;
}
nsresult nsImageFrame::StopAnimation() {
nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest();
if (currentRequest) {
bool deregister = true;
nsLayoutUtils::DeregisterImageRequest(PresContext(), currentRequest,
&deregister);
}
return NS_OK;
}
void nsImageFrame::IconLoad::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) {
MOZ_ASSERT(aRequest);
if (aType != imgINotificationObserver::LOAD_COMPLETE &&
aType != imgINotificationObserver::FRAME_UPDATE) {
return;
}
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
if (!image) {
return;
}
// Retrieve the image's intrinsic size.
int32_t width = 0;
int32_t height = 0;
image->GetWidth(&width);
image->GetHeight(&height);
// Request a decode at that size.
image->RequestDecodeForSize(IntSize(width, height),
imgIContainer::DECODE_FLAGS_DEFAULT |
imgIContainer::FLAG_HIGH_QUALITY_SCALING);
}
nsTObserverArray<nsImageFrame*>::ForwardIterator iter(mIconObservers);
nsImageFrame* frame;
while (iter.HasMore()) {
frame = iter.GetNext();
frame->InvalidateFrame();
}
}
NS_IMPL_ISUPPORTS(nsImageListener, imgINotificationObserver)
nsImageListener::nsImageListener(nsImageFrame* aFrame) : mFrame(aFrame) {}
nsImageListener::~nsImageListener() = default;
void nsImageListener::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) {
if (!mFrame) {
return;
}
return mFrame->Notify(aRequest, aType, aData);
}
static bool IsInAutoWidthTableCellForQuirk(nsIFrame* aFrame) {
if (eCompatibility_NavQuirks != aFrame->PresContext()->CompatibilityMode())
return false;
// Check if the parent of the closest nsBlockFrame has auto width.
nsBlockFrame* ancestor = nsLayoutUtils::FindNearestBlockAncestor(aFrame);
if (ancestor->Style()->GetPseudoType() == PseudoStyleType::cellContent) {
// Assume direct parent is a table cell frame.
nsFrame* grandAncestor = static_cast<nsFrame*>(ancestor->GetParent());
return grandAncestor && grandAncestor->StylePosition()->mWidth.IsAuto();
}
return false;
}
void nsImageFrame::AddInlineMinISize(gfxContext* aRenderingContext,
nsIFrame::InlineMinISizeData* aData) {
nscoord isize = nsLayoutUtils::IntrinsicForContainer(
aRenderingContext, this, nsLayoutUtils::MIN_ISIZE);
bool canBreak = !IsInAutoWidthTableCellForQuirk(this);
aData->DefaultAddInlineMinISize(this, isize, canBreak);
}
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