From d050188cd525b769d33e2a2d94454b32aaa0b622 Mon Sep 17 00:00:00 2001 From: Moonchild Date: Mon, 11 May 2020 23:17:47 +0000 Subject: Issue #1543 - Align with no src to the updated spec. --- layout/generic/nsImageFrame.cpp | 112 ++++++++++++++++++++-------------------- layout/generic/nsImageFrame.h | 2 + 2 files changed, 59 insertions(+), 55 deletions(-) (limited to 'layout/generic') diff --git a/layout/generic/nsImageFrame.cpp b/layout/generic/nsImageFrame.cpp index 342370050..226cca2cf 100644 --- a/layout/generic/nsImageFrame.cpp +++ b/layout/generic/nsImageFrame.cpp @@ -116,7 +116,7 @@ static bool HaveSpecifiedSize(const nsStylePosition* aStylePosition) // Decide whether we can optimize away reflows that result from the // image's intrinsic size changing. -inline bool HaveFixedSize(const ReflowInput& aReflowInput) +static bool HaveFixedSize(const ReflowInput& aReflowInput) { NS_ASSERTION(aReflowInput.mStylePosition, "crappy reflowInput - null stylePosition"); // Don't try to make this optimization when an image has percentages @@ -440,8 +440,22 @@ nsImageFrame::SourceRectToDest(const nsIntRect& aRect) (!(_state).HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED) && \ (_state).HasState(NS_EVENT_STATE_LOADING) && (_loadingOK))) -/* static */ -bool +static bool HasAltText(Element* aElement) +{ + // We always return some alternate text for , see + // nsCSSFrameConstructor::GetAlternateTextFor. + if (aElement->IsHTMLElement(nsGkAtoms::input)) { + return true; + } + + MOZ_ASSERT(aElement->IsHTMLElement(nsGkAtoms::img)); + nsAutoString altText; + return aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, altText) && !altText.IsEmpty(); +} + +// Check if we want to use an image frame or just let the frame constructor make +// us into an inline. +/* static */ bool nsImageFrame::ShouldCreateImageFrameFor(Element* aElement, nsStyleContext* aStyleContext) { @@ -452,44 +466,26 @@ nsImageFrame::ShouldCreateImageFrameFor(Element* aElement, return true; } - // Check if we want to use a placeholder box with an icon or just - // let the presShell make us into inline text. Decide as follows: - // - // - if our special "force icons" style is set, show an icon - // - else if our "do not show placeholders" pref is set, skip the icon - // - else: - // - if there is a src attribute, there is no alt attribute, - // and this is not an (which could not possibly have - // such an attribute), show an icon. - // - if QuirksMode, and the IMG has a size show an icon. - // - otherwise, skip the icon - bool useSizedBox; - + // If our special "force icons" style is set, show an icon if (aStyleContext->StyleUIReset()->mForceBrokenImageIcon) { - useSizedBox = true; - } - else if (gIconLoad && gIconLoad->mPrefForceInlineAltText) { - useSizedBox = false; + return true; } - else if (aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::src) && - !aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::alt) && - !aElement->IsHTMLElement(nsGkAtoms::object) && - !aElement->IsHTMLElement(nsGkAtoms::input)) { - // Use a sized box if we have no alt text. This means no alt attribute - // and the node is not an object or an input (since those always have alt - // text). - useSizedBox = true; + + // If our "do not show placeholders" pref is set, skip the icon + if (gIconLoad && gIconLoad->mPrefForceInlineAltText) { + return false; } - else if (aStyleContext->PresContext()->CompatibilityMode() != - eCompatibility_NavQuirks) { - useSizedBox = false; + + // If there is no Alt text, always create an image frame (regardless of src) + if (!HasAltText(aElement)) { + return true; } - else { - // check whether we have specified size - useSizedBox = HaveSpecifiedSize(aStyleContext->StylePosition()); + + if (aStyleContext->PresContext()->CompatibilityMode() == eCompatibility_NavQuirks) { + return HaveSpecifiedSize(aStyleContext->StylePosition()); } - - return useSizedBox; + + return false; } nsresult @@ -775,6 +771,25 @@ nsImageFrame::PredictedDestRect(const nsRect& aFrameContentBox) StylePosition()); } +bool nsImageFrame::ShouldShowBrokenImageIcon() const +{ + bool imageBroken = false; + // Check for broken images. valid null images (eg. img src="") are + // not considered broken because they have no image requests + nsCOMPtr imageLoader = do_QueryInterface(mContent); + if (imageLoader) { + nsCOMPtr currentRequest; + imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, + getter_AddRefs(currentRequest)); + uint32_t imageStatus; + imageBroken = + currentRequest && + NS_SUCCEEDED(currentRequest->GetImageStatus(&imageStatus)) && + (imageStatus & imgIRequest::STATUS_ERROR); + } + return imageBroken; +} + void nsImageFrame::EnsureIntrinsicSizeAndRatio() { @@ -789,25 +804,11 @@ nsImageFrame::EnsureIntrinsicSizeAndRatio() UpdateIntrinsicSize(mImage); UpdateIntrinsicRatio(mImage); } else { - // image request is null or image size not known, probably an - // invalid image specified + // Image request is null or image size not known. if (!(GetStateBits() & NS_FRAME_GENERATED_CONTENT)) { - bool imageBroken = false; - // check for broken images. valid null images (eg. img src="") are - // not considered broken because they have no image requests - nsCOMPtr imageLoader = do_QueryInterface(mContent); - if (imageLoader) { - nsCOMPtr currentRequest; - imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, - getter_AddRefs(currentRequest)); - uint32_t imageStatus; - imageBroken = - currentRequest && - NS_SUCCEEDED(currentRequest->GetImageStatus(&imageStatus)) && - (imageStatus & imgIRequest::STATUS_ERROR); - } - // invalid image specified. make the image big enough for the "broken" icon - if (imageBroken) { + // Likely an invalid image. Check if we should display it as broken. + if (ShouldShowBrokenImageIcon()) { + // Invalid image specified. make the image big enough for the "broken" icon nscoord edgeLengthToUse = nsPresContext::CSSPixelsToAppUnits( ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH))); @@ -1389,7 +1390,8 @@ nsImageFrame::DisplayAltFeedback(nsRenderingContext& aRenderingContext, DrawResult result = DrawResult::NOT_READY; // Check if we should display image placeholders - if (!gIconLoad->mPrefShowPlaceholders || + if (!ShouldShowBrokenImageIcon() || + !gIconLoad->mPrefShowPlaceholders || (isLoading && !gIconLoad->mPrefShowLoadingPlaceholder)) { result = DrawResult::SUCCESS; } else { diff --git a/layout/generic/nsImageFrame.h b/layout/generic/nsImageFrame.h index fceecc43d..59af1be32 100644 --- a/layout/generic/nsImageFrame.h +++ b/layout/generic/nsImageFrame.h @@ -106,6 +106,8 @@ public: void OnVisibilityChange(Visibility aNewVisibility, Maybe aNonvisibleAction = Nothing()) override; + bool ShouldShowBrokenImageIcon() const; + #ifdef ACCESSIBILITY virtual mozilla::a11y::AccType AccessibleType() override; #endif -- cgit v1.2.3