/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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 bitmap image data */ #include "nsImageFrame.h" #include "mozilla/DebugOnly.h" #include "mozilla/EventStates.h" #include "mozilla/MouseEvents.h" #include "nsCOMPtr.h" #include "nsIImageLoadingContent.h" #include "nsString.h" #include "nsPrintfCString.h" #include "nsPresContext.h" #include "nsRenderingContext.h" #include "nsIPresShell.h" #include "nsGkAtoms.h" #include "nsIDocument.h" #include "nsContentUtils.h" #include "nsCSSAnonBoxes.h" #include "nsStyleContext.h" #include "nsStyleConsts.h" #include "nsStyleCoord.h" #include "nsTransform2D.h" #include "nsImageMap.h" #include "nsIIOService.h" #include "nsILoadGroup.h" #include "nsISupportsPriority.h" #include "nsNetUtil.h" #include "nsCSSRendering.h" #include "nsIDOMHTMLAnchorElement.h" #include "nsNameSpaceManager.h" #include #ifdef ACCESSIBILITY #include "nsAccessibilityService.h" #endif #include "nsIDOMNode.h" #include "nsLayoutUtils.h" #include "nsDisplayList.h" #include "imgIContainer.h" #include "imgLoader.h" #include "imgRequestProxy.h" #include "nsCSSFrameConstructor.h" #include "nsIDOMRange.h" #include "nsError.h" #include "nsBidiUtils.h" #include "nsBidiPresUtils.h" #include "gfxRect.h" #include "ImageLayers.h" #include "ImageContainer.h" #include "nsStyleSet.h" #include "nsBlockFrame.h" #include "nsStyleStructInlines.h" #include "mozilla/Preferences.h" #include "mozilla/dom/Link.h" using namespace mozilla; // sizes (pixels) for image icon, padding and border frame #define ICON_SIZE (16) #define ICON_PADDING (3) #define ALT_BORDER_WIDTH (1) //we must add hooks soon #define IMAGE_EDITOR_CHECK 1 // Default alignment value (so we can tell an unset value from a set value) #define ALIGN_UNSET uint8_t(-1) using namespace mozilla::layers; using namespace mozilla::dom; // static icon information nsImageFrame::IconLoad* nsImageFrame::gIconLoad = nullptr; // cached IO service for loading icons nsIIOService* nsImageFrame::sIOService; // test if the width and height are fixed, looking at the style data static bool HaveFixedSize(const nsStylePosition* aStylePosition) { // check the width and height values in the reflow state'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.IsCoordPercentCalcUnit() && aStylePosition->mHeight.IsCoordPercentCalcUnit(); } // use the data in the reflow state to decide if the image has a constrained size // (i.e. width and height that are based on the containing block size and not the image size) // so we can avoid animated GIF related reflows inline bool HaveFixedSize(const nsHTMLReflowState& aReflowState) { NS_ASSERTION(aReflowState.mStylePosition, "crappy reflowState - null stylePosition"); // when an image has percent css style height or width, but ComputedHeight() // or ComputedWidth() of reflow state is NS_UNCONSTRAINEDSIZE // it needs to return false to cause an incremental reflow later // if an image is inside table like bug 156731 simple testcase III, // during pass 1 reflow, ComputedWidth() is NS_UNCONSTRAINEDSIZE // in pass 2 reflow, ComputedWidth() is 0, it also needs to return false // see bug 156731 const nsStyleCoord &height = aReflowState.mStylePosition->mHeight; const nsStyleCoord &width = aReflowState.mStylePosition->mWidth; return ((height.HasPercent() && NS_UNCONSTRAINEDSIZE == aReflowState.ComputedHeight()) || (width.HasPercent() && (NS_UNCONSTRAINEDSIZE == aReflowState.ComputedWidth() || 0 == aReflowState.ComputedWidth()))) ? false : HaveFixedSize(aReflowState.mStylePosition); } nsIFrame* NS_NewImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) { return new (aPresShell) nsImageFrame(aContext); } NS_IMPL_FRAMEARENA_HELPERS(nsImageFrame) nsImageFrame::nsImageFrame(nsStyleContext* aContext) : ImageFrameSuper(aContext), mComputedSize(0, 0), mIntrinsicRatio(0, 0), mDisplayingIcon(false), mFirstFrameComplete(false), mReflowCallbackPosted(false) { // We assume our size is not constrained and we haven't gotten an // initial reflow yet, so don't touch those flags. mIntrinsicSize.width.SetCoordValue(0); mIntrinsicSize.height.SetCoordValue(0); } nsImageFrame::~nsImageFrame() { } NS_QUERYFRAME_HEAD(nsImageFrame) NS_QUERYFRAME_ENTRY(nsImageFrame) NS_QUERYFRAME_TAIL_INHERITING(ImageFrameSuper) #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) { mImageMap->Destroy(); NS_RELEASE(mImageMap); #ifdef ACCESSIBILITY nsAccessibilityService* accService = GetAccService(); if (accService) { accService->RecreateAccessible(PresContext()->PresShell(), mContent); } #endif } } void nsImageFrame::DestroyFrom(nsIFrame* aDestructRoot) { if (mReflowCallbackPosted) { PresContext()->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(); // set the frame to null so we don't send messages to a dead object. if (mListener) { nsCOMPtr imageLoader = do_QueryInterface(mContent); if (imageLoader) { // Notify our image loading content that we are going away so it can // deregister with our refresh driver. imageLoader->FrameDestroyed(this); imageLoader->RemoveObserver(mListener); } reinterpret_cast(mListener.get())->SetFrame(nullptr); } mListener = nullptr; // If we were displaying an icon, take ourselves off the list if (mDisplayingIcon) gIconLoad->RemoveIconObserver(this); nsSplittableFrame::DestroyFrom(aDestructRoot); } void nsImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, nsIFrame* aPrevInFlow) { nsSplittableFrame::Init(aContent, aParent, aPrevInFlow); mListener = new nsImageListener(this); nsCOMPtr imageLoader = do_QueryInterface(aContent); if (!imageLoader) { NS_RUNTIMEABORT("Why do we have an nsImageFrame here at all?"); } imageLoader->AddObserver(mListener); nsPresContext *aPresContext = PresContext(); if (!gIconLoad) LoadIcons(aPresContext); // We have a PresContext now, so we need to notify the image content node // that it can register images. imageLoader->FrameCreated(this); // Give image loads associated with an image frame a small priority boost! nsCOMPtr currentRequest; imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(currentRequest)); nsCOMPtr p = do_QueryInterface(currentRequest); if (p) p->AdjustPriority(-1); // If we already have an image container, OnStartContainer won't be called if (currentRequest) { nsCOMPtr image; currentRequest->GetImage(getter_AddRefs(image)); OnStartContainer(currentRequest, image); } } bool nsImageFrame::UpdateIntrinsicSize(imgIContainer* aImage) { NS_PRECONDITION(aImage, "null image"); if (!aImage) return false; IntrinsicSize oldIntrinsicSize = mIntrinsicSize; mIntrinsicSize = IntrinsicSize(); // Set intrinsic size to match aImage's reported intrinsic width & height. nsSize intrinsicSize; if (NS_SUCCEEDED(aImage->GetIntrinsicSize(&intrinsicSize))) { // If the image has no intrinsic width, intrinsicSize.width will be -1, and // we can leave mIntrinsicSize.width at its default value of eStyleUnit_None. // Otherwise we use intrinsicSize.width. Height works the same way. if (intrinsicSize.width != -1) mIntrinsicSize.width.SetCoordValue(intrinsicSize.width); if (intrinsicSize.height != -1) mIntrinsicSize.height.SetCoordValue(intrinsicSize.height); } else { // Failure means that the image hasn't loaded enough to report a result. We // treat this case as if the image's intrinsic size was 0x0. mIntrinsicSize.width.SetCoordValue(0); mIntrinsicSize.height.SetCoordValue(0); } return mIntrinsicSize != oldIntrinsicSize; } bool nsImageFrame::UpdateIntrinsicRatio(imgIContainer* aImage) { NS_PRECONDITION(aImage, "null image"); if (!aImage) return false; nsSize oldIntrinsicRatio = mIntrinsicRatio; // Set intrinsic ratio to match aImage's reported intrinsic ratio. if (NS_FAILED(aImage->GetIntrinsicRatio(&mIntrinsicRatio))) mIntrinsicRatio.SizeTo(0, 0); return mIntrinsicRatio != oldIntrinsicRatio; } bool nsImageFrame::GetSourceToDestTransform(nsTransform2D& aTransform) { // Set the translation components. // XXXbz does this introduce rounding errors because of the cast to // float? Should we just manually add that stuff in every time // instead? nsRect innerArea = GetInnerArea(); aTransform.SetToTranslate(float(innerArea.x), float(innerArea.y - GetContinuationOffset())); // Set the scale factors. if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord && mIntrinsicSize.width.GetCoordValue() != 0 && mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord && mIntrinsicSize.height.GetCoordValue() != 0 && mIntrinsicSize.width.GetCoordValue() != mComputedSize.width && mIntrinsicSize.height.GetCoordValue() != mComputedSize.height) { aTransform.SetScale(float(mComputedSize.width) / float(mIntrinsicSize.width.GetCoordValue()), float(mComputedSize.height) / float(mIntrinsicSize.height.GetCoordValue())); return true; } return false; } /* * These two functions basically do the same check. The first one * checks that the given request is the current request for our * mContent. The second checks that the given image container the * same as the image container on the current request for our * mContent. */ bool nsImageFrame::IsPendingLoad(imgIRequest* aRequest) const { // Default to pending load in case of errors nsCOMPtr imageLoader(do_QueryInterface(mContent)); NS_ASSERTION(imageLoader, "No image loading content?"); int32_t requestType = nsIImageLoadingContent::UNKNOWN_REQUEST; imageLoader->GetRequestType(aRequest, &requestType); return requestType != nsIImageLoadingContent::CURRENT_REQUEST; } bool nsImageFrame::IsPendingLoad(imgIContainer* aContainer) const { // default to pending load in case of errors if (!aContainer) { NS_ERROR("No image container!"); return true; } nsCOMPtr imageLoader(do_QueryInterface(mContent)); NS_ASSERTION(imageLoader, "No image loading content?"); nsCOMPtr currentRequest; imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(currentRequest)); if (!currentRequest) { NS_ERROR("No current request"); return true; } nsCOMPtr currentContainer; currentRequest->GetImage(getter_AddRefs(currentContainer)); return currentContainer != aContainer; } 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 | \ NS_EVENT_STATE_LOADING) // This is a macro so that we don't evaluate the boolean last arg // unless we have to; it can be expensive #define IMAGE_OK(_state, _loadingOK) \ (!(_state).HasAtLeastOneOfStates(BAD_STATES) || \ (!(_state).HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED) && \ (_state).HasState(NS_EVENT_STATE_LOADING) && (_loadingOK))) /* static */ bool nsImageFrame::ShouldCreateImageFrameFor(Element* aElement, nsStyleContext* aStyleContext) { EventStates state = aElement->State(); if (IMAGE_OK(state, HaveFixedSize(aStyleContext->StylePosition()))) { // Image is fine; do the image frame thing 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 (aStyleContext->StyleUIReset()->mForceBrokenImageIcon) { useSizedBox = true; } else if (gIconLoad && gIconLoad->mPrefForceInlineAltText) { useSizedBox = false; } else if (aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::src) && !aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::alt) && !aElement->IsHTML(nsGkAtoms::object) && !aElement->IsHTML(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; } else if (aStyleContext->PresContext()->CompatibilityMode() != eCompatibility_NavQuirks) { useSizedBox = false; } else { // check whether we have fixed size useSizedBox = HaveFixedSize(aStyleContext->StylePosition()); } return useSizedBox; } nsresult nsImageFrame::Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData) { if (aType == imgINotificationObserver::SIZE_AVAILABLE) { nsCOMPtr image; aRequest->GetImage(getter_AddRefs(image)); return OnStartContainer(aRequest, image); } if (aType == imgINotificationObserver::FRAME_UPDATE) { return OnDataAvailable(aRequest, aData); } if (aType == imgINotificationObserver::FRAME_COMPLETE) { mFirstFrameComplete = true; } if (aType == imgINotificationObserver::LOAD_COMPLETE) { uint32_t imgStatus; aRequest->GetImageStatus(&imgStatus); nsresult status = imgStatus & imgIRequest::STATUS_ERROR ? NS_ERROR_FAILURE : NS_OK; return OnStopRequest(aRequest, status); } return NS_OK; } 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); } nsresult nsImageFrame::OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage) { if (!aImage) return NS_ERROR_INVALID_ARG; /* Get requested animation policy from the pres context: * normal = 0 * one frame = 1 * one loop = 2 */ nsPresContext *presContext = PresContext(); aImage->SetAnimationMode(presContext->ImageAnimationMode()); if (IsPendingLoad(aRequest)) { // We don't care return NS_OK; } bool intrinsicSizeChanged = false; 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); intrinsicSizeChanged = UpdateIntrinsicSize(mImage); intrinsicSizeChanged = UpdateIntrinsicRatio(mImage) || intrinsicSizeChanged; } else { // We no longer have a valid image, so release our stored image container. mImage = nullptr; // Have to size to 0,0 so that GetDesiredSize recalculates the size. mIntrinsicSize.width.SetCoordValue(0); mIntrinsicSize.height.SetCoordValue(0); mIntrinsicRatio.SizeTo(0, 0); intrinsicSizeChanged = true; } if (intrinsicSizeChanged && (mState & IMAGE_GOTINITIALREFLOW)) { // Now we need to reflow if we have an unconstrained size and have // already gotten the initial reflow if (!(mState & IMAGE_SIZECONSTRAINED)) { nsIPresShell *presShell = presContext->GetPresShell(); NS_ASSERTION(presShell, "No PresShell."); if (presShell) { presShell->FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); } } } return NS_OK; } nsresult nsImageFrame::OnDataAvailable(imgIRequest *aRequest, const nsIntRect *aRect) { if (mFirstFrameComplete) { nsCOMPtr container; aRequest->GetImage(getter_AddRefs(container)); return FrameChanged(aRequest, container); } // XXX do we need to make sure that the reflow from the // OnStartContainer has been processed before we start calling // invalidate? NS_ENSURE_ARG_POINTER(aRect); if (!(mState & IMAGE_GOTINITIALREFLOW)) { // Don't bother to do anything; we have a reflow coming up! return NS_OK; } if (IsPendingLoad(aRequest)) { // We don't care return NS_OK; } nsIntRect rect = mImage ? mImage->GetImageSpaceInvalidationRect(*aRect) : *aRect; #ifdef DEBUG_decode printf("Source rect (%d,%d,%d,%d)\n", aRect->x, aRect->y, aRect->width, aRect->height); #endif if (rect.IsEqualInterior(nsIntRect::GetMaxSizedIntRect())) { InvalidateFrame(nsDisplayItem::TYPE_IMAGE); InvalidateFrame(nsDisplayItem::TYPE_ALT_FEEDBACK); } else { nsRect invalid = SourceRectToDest(rect); InvalidateFrameWithRect(invalid, nsDisplayItem::TYPE_IMAGE); InvalidateFrameWithRect(invalid, nsDisplayItem::TYPE_ALT_FEEDBACK); } return NS_OK; } nsresult nsImageFrame::OnStopRequest(imgIRequest *aRequest, nsresult aStatus) { // Check what request type we're dealing with nsCOMPtr imageLoader = do_QueryInterface(mContent); NS_ASSERTION(imageLoader, "Who's notifying us??"); int32_t loadType = nsIImageLoadingContent::UNKNOWN_REQUEST; imageLoader->GetRequestType(aRequest, &loadType); if (loadType != nsIImageLoadingContent::CURRENT_REQUEST && loadType != nsIImageLoadingContent::PENDING_REQUEST) { return NS_ERROR_FAILURE; } NotifyNewCurrentRequest(aRequest, aStatus); return NS_OK; } void nsImageFrame::NotifyNewCurrentRequest(imgIRequest *aRequest, nsresult aStatus) { nsCOMPtr image; aRequest->GetImage(getter_AddRefs(image)); NS_ASSERTION(image || NS_FAILED(aStatus), "Successful load with no container?"); // May have to switch sizes here! bool intrinsicSizeChanged = true; if (NS_SUCCEEDED(aStatus) && image && SizeIsAvailable(aRequest)) { // Update our stored image container, orienting according to our style. mImage = nsLayoutUtils::OrientImage(image, StyleVisibility()->mImageOrientation); intrinsicSizeChanged = UpdateIntrinsicSize(mImage); intrinsicSizeChanged = UpdateIntrinsicRatio(mImage) || intrinsicSizeChanged; } else { // We no longer have a valid image, so release our stored image container. mImage = nullptr; // Have to size to 0,0 so that GetDesiredSize recalculates the size mIntrinsicSize.width.SetCoordValue(0); mIntrinsicSize.height.SetCoordValue(0); mIntrinsicRatio.SizeTo(0, 0); } if (mState & IMAGE_GOTINITIALREFLOW) { // do nothing if we haven't gotten the initial reflow yet if (!(mState & IMAGE_SIZECONSTRAINED) && intrinsicSizeChanged) { nsIPresShell *presShell = PresContext()->GetPresShell(); if (presShell) { presShell->FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); } } // Update border+content to account for image change InvalidateFrame(); } } nsresult nsImageFrame::FrameChanged(imgIRequest *aRequest, imgIContainer *aContainer) { if (!StyleVisibility()->IsVisible()) { return NS_OK; } if (IsPendingLoad(aContainer)) { // We don't care about it return NS_OK; } InvalidateLayer(nsDisplayItem::TYPE_IMAGE); return NS_OK; } void nsImageFrame::EnsureIntrinsicSizeAndRatio(nsPresContext* aPresContext) { // If mIntrinsicSize.width and height are 0, then we need to update from the // image container. if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord && mIntrinsicSize.width.GetCoordValue() == 0 && mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord && mIntrinsicSize.height.GetCoordValue() == 0) { if (mImage) { UpdateIntrinsicSize(mImage); UpdateIntrinsicRatio(mImage); } else { // image request is null or image size not known, probably an // invalid image specified // - make the image big enough for the icon (it may not be // used if inline alt expansion is used instead) if (!(GetStateBits() & NS_FRAME_GENERATED_CONTENT)) { nscoord edgeLengthToUse = nsPresContext::CSSPixelsToAppUnits( ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH))); mIntrinsicSize.width.SetCoordValue(edgeLengthToUse); mIntrinsicSize.height.SetCoordValue(edgeLengthToUse); mIntrinsicRatio.SizeTo(1, 1); } } } } /* virtual */ nsSize nsImageFrame::ComputeSize(nsRenderingContext *aRenderingContext, nsSize aCBSize, nscoord aAvailableWidth, nsSize aMargin, nsSize aBorder, nsSize aPadding, uint32_t aFlags) { nsPresContext *presContext = PresContext(); EnsureIntrinsicSizeAndRatio(presContext); nsCOMPtr imageLoader = do_QueryInterface(mContent); NS_ASSERTION(imageLoader, "No content node??"); mozilla::IntrinsicSize intrinsicSize(mIntrinsicSize); // Content may override our default dimensions. This is termed as overriding // the intrinsic size by the spec, but all other consumers of mIntrinsic* // values are being used to refer to the real/true size of the image data. if (imageLoader && mImage && intrinsicSize.width.GetUnit() == eStyleUnit_Coord && intrinsicSize.height.GetUnit() == eStyleUnit_Coord) { uint32_t width; uint32_t height; if (NS_SUCCEEDED(imageLoader->GetNaturalWidth(&width)) && NS_SUCCEEDED(imageLoader->GetNaturalHeight(&height))) { nscoord appWidth = nsPresContext::CSSPixelsToAppUnits((int32_t)width); nscoord appHeight = nsPresContext::CSSPixelsToAppUnits((int32_t)height); // If this image is rotated, we'll need to transpose the natural // width/height. bool coordFlip; if (StyleVisibility()->mImageOrientation.IsFromImage()) { coordFlip = mImage->GetOrientation().SwapsWidthAndHeight(); } else { coordFlip = StyleVisibility()->mImageOrientation.SwapsWidthAndHeight(); } intrinsicSize.width.SetCoordValue(coordFlip ? appHeight : appWidth); intrinsicSize.height.SetCoordValue(coordFlip ? appWidth : appHeight); } } return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions( aRenderingContext, this, intrinsicSize, mIntrinsicRatio, aCBSize, aMargin, aBorder, aPadding); } nsRect nsImageFrame::GetInnerArea() const { return GetContentRect() - GetPosition(); } // 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; } /* virtual */ nscoord nsImageFrame::GetMinWidth(nsRenderingContext *aRenderingContext) { // XXX The caller doesn't account for constraints of the height, // min-height, and max-height properties. DebugOnly result; DISPLAY_MIN_WIDTH(this, result); nsPresContext *presContext = PresContext(); EnsureIntrinsicSizeAndRatio(presContext); return mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord ? mIntrinsicSize.width.GetCoordValue() : 0; } /* virtual */ nscoord nsImageFrame::GetPrefWidth(nsRenderingContext *aRenderingContext) { // XXX The caller doesn't account for constraints of the height, // min-height, and max-height properties. DebugOnly result; DISPLAY_PREF_WIDTH(this, result); nsPresContext *presContext = PresContext(); EnsureIntrinsicSizeAndRatio(presContext); // convert from normal twips to scaled twips (printing...) return mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord ? mIntrinsicSize.width.GetCoordValue() : 0; } /* virtual */ IntrinsicSize nsImageFrame::GetIntrinsicSize() { return mIntrinsicSize; } /* virtual */ nsSize nsImageFrame::GetIntrinsicRatio() { return mIntrinsicRatio; } void nsImageFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { DO_GLOBAL_REFLOW_COUNT("nsImageFrame"); DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus); NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("enter nsImageFrame::Reflow: availSize=%d,%d", aReflowState.AvailableWidth(), aReflowState.AvailableHeight())); NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow"); aStatus = NS_FRAME_COMPLETE; // see if we have a frozen size (i.e. a fixed width and height) if (HaveFixedSize(aReflowState)) { mState |= IMAGE_SIZECONSTRAINED; } else { mState &= ~IMAGE_SIZECONSTRAINED; } // XXXldb These two bits are almost exact opposites (except in the // middle of the initial reflow); remove IMAGE_GOTINITIALREFLOW. if (GetStateBits() & NS_FRAME_FIRST_REFLOW) { mState |= IMAGE_GOTINITIALREFLOW; } mComputedSize = nsSize(aReflowState.ComputedWidth(), aReflowState.ComputedHeight()); aMetrics.Width() = mComputedSize.width; aMetrics.Height() = mComputedSize.height; // add borders and padding aMetrics.Width() += aReflowState.ComputedPhysicalBorderPadding().LeftRight(); aMetrics.Height() += aReflowState.ComputedPhysicalBorderPadding().TopBottom(); if (GetPrevInFlow()) { aMetrics.Width() = GetPrevInFlow()->GetSize().width; nscoord y = GetContinuationOffset(); aMetrics.Height() -= y + aReflowState.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; nsCOMPtr imageLoader = do_QueryInterface(mContent); NS_ASSERTION(imageLoader, "No content node??"); if (imageLoader) { nsCOMPtr currentRequest; imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(currentRequest)); if (currentRequest) { currentRequest->GetImageStatus(&loadStatus); } } if (aPresContext->IsPaginated() && ((loadStatus & imgIRequest::STATUS_SIZE_AVAILABLE) || (mState & IMAGE_SIZECONSTRAINED)) && NS_UNCONSTRAINEDSIZE != aReflowState.AvailableHeight() && aMetrics.Height() > aReflowState.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), aReflowState.AvailableHeight()); aStatus = NS_FRAME_NOT_COMPLETE; } aMetrics.SetOverflowAreasToDesiredBounds(); EventStates contentState = mContent->AsElement()->State(); bool imageOK = IMAGE_OK(contentState, true); // 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); } FinishAndStoreOverflow(&aMetrics); if ((GetStateBits() & NS_FRAME_FIRST_REFLOW) && !mReflowCallbackPosted) { nsIPresShell* shell = PresContext()->PresShell(); mReflowCallbackPosted = true; shell->PostReflowCallback(this); } NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("exit nsImageFrame::Reflow: size=%d,%d", aMetrics.Width(), aMetrics.Height())); NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics); } bool nsImageFrame::ReflowFinished() { mReflowCallbackPosted = false; nsLayoutUtils::UpdateImageVisibilityForFrame(this); 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, nsRenderingContext& aContext) { nscoord totalWidth = 0; aContext.SetTextRunRTL(false); nscoord spaceWidth = aContext.GetWidth(' '); 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::GetStringWidth(this, &aContext, aString, len); 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, nsRenderingContext& aRenderingContext, const nsString& aAltText, const nsRect& aRect) { // Set font and color aRenderingContext.SetColor(StyleColor()->mColor); nsRefPtr fm; nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm), nsLayoutUtils::FontSizeInflationFor(this)); aRenderingContext.SetFont(fm); // Format the text to display within the formatting rect nscoord maxAscent = fm->MaxAscent(); nscoord maxDescent = fm->MaxDescent(); nscoord height = fm->MaxHeight(); // 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(); nscoord y = aRect.y; 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) && (firstLine || (y + maxDescent) < aRect.YMost())) { // Determine how much of the text to display on this line uint32_t maxFit; // number of characters that fit nscoord strWidth = MeasureString(str, strLen, aRect.width, maxFit, aRenderingContext); // Display the text nsresult rv = NS_ERROR_FAILURE; if (aPresContext->BidiEnabled()) { const nsStyleVisibility* vis = StyleVisibility(); if (vis->mDirection == NS_STYLE_DIRECTION_RTL) rv = nsBidiPresUtils::RenderText(str, maxFit, NSBIDI_RTL, aPresContext, aRenderingContext, aRenderingContext, aRect.XMost() - strWidth, y + maxAscent); else rv = nsBidiPresUtils::RenderText(str, maxFit, NSBIDI_LTR, aPresContext, aRenderingContext, aRenderingContext, aRect.x, y + maxAscent); } if (NS_FAILED(rv)) aRenderingContext.DrawString(str, maxFit, aRect.x, y + maxAscent); // Move to the next line str += maxFit; strLen -= maxFit; y += height; firstLine = false; } } struct nsRecessedBorder : public nsStyleBorder { nsRecessedBorder(nscoord aBorderWidth, nsPresContext* aPresContext) : nsStyleBorder(aPresContext) { NS_FOR_CSS_SIDES(side) { // Note: use SetBorderColor here because we want to make sure // the "special" flags are unset. SetBorderColor(side, NS_RGB(0, 0, 0)); mBorder.Side(side) = aBorderWidth; // Note: use SetBorderStyle here because we want to affect // mComputedBorder SetBorderStyle(side, NS_STYLE_BORDER_STYLE_INSET); } } }; class nsDisplayAltFeedback : public nsDisplayItem { public: nsDisplayAltFeedback(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame) : nsDisplayItem(aBuilder, aFrame) {} virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) MOZ_OVERRIDE { *aSnap = false; return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame(); } virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) MOZ_OVERRIDE { nsImageFrame* f = static_cast(mFrame); EventStates state = f->GetContent()->AsElement()->State(); f->DisplayAltFeedback(*aCtx, mVisibleRect, IMAGE_OK(state, true) ? nsImageFrame::gIconLoad->mLoadingImage : nsImageFrame::gIconLoad->mBrokenImage, ToReferenceFrame()); } NS_DISPLAY_DECL_NAME("AltFeedback", TYPE_ALT_FEEDBACK) }; void nsImageFrame::DisplayAltFeedback(nsRenderingContext& aRenderingContext, const nsRect& aDirtyRect, imgIRequest* aRequest, nsPoint aPt) { // We should definitely have a gIconLoad here. NS_ABORT_IF_FALSE(gIconLoad, "How did we succeed in Init then?"); // 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; } // Paint the border nsRecessedBorder recessedBorder(borderEdgeWidth, PresContext()); nsCSSRendering::PaintBorderWithStyleBorder(PresContext(), aRenderingContext, this, inner, inner, recessedBorder, mStyleContext); // 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; } // Clip so we don't render outside the inner rect aRenderingContext.PushState(); aRenderingContext.IntersectClip(inner); // Check if we should display image placeholders if (gIconLoad->mPrefShowPlaceholders) { const nsStyleVisibility* vis = StyleVisibility(); nscoord size = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE); bool iconUsed = false; // 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 (aRequest && !mDisplayingIcon) { gIconLoad->AddIconObserver(this); mDisplayingIcon = true; } // If the icon in question is loaded and decoded, draw it uint32_t imageStatus = 0; if (aRequest) aRequest->GetImageStatus(&imageStatus); if (imageStatus & imgIRequest::STATUS_FRAME_COMPLETE) { nsCOMPtr imgCon; aRequest->GetImage(getter_AddRefs(imgCon)); NS_ABORT_IF_FALSE(imgCon, "Frame Complete, but no image container?"); nsRect dest((vis->mDirection == NS_STYLE_DIRECTION_RTL) ? inner.XMost() - size : inner.x, inner.y, size, size); nsLayoutUtils::DrawSingleImage(&aRenderingContext, PresContext(), imgCon, nsLayoutUtils::GetGraphicsFilterForFrame(this), dest, aDirtyRect, nullptr, imgIContainer::FLAG_NONE); iconUsed = true; } // if we could not draw the icon, flag that we're waiting for it and // just draw some graffiti in the mean time if (!iconUsed) { nscoord iconXPos = (vis->mDirection == NS_STYLE_DIRECTION_RTL) ? inner.XMost() - size : inner.x; nscoord twoPX = nsPresContext::CSSPixelsToAppUnits(2); aRenderingContext.DrawRect(iconXPos, inner.y,size,size); aRenderingContext.PushState(); aRenderingContext.SetColor(NS_RGB(0xFF,0,0)); aRenderingContext.FillEllipse(size/2 + iconXPos, size/2 + inner.y, size/2 - twoPX, size/2 - twoPX); aRenderingContext.PopState(); } // Reduce the inner rect by the width of the icon, and leave an // additional ICON_PADDING pixels for padding int32_t iconWidth = nsPresContext::CSSPixelsToAppUnits(ICON_SIZE + ICON_PADDING); if (vis->mDirection != NS_STYLE_DIRECTION_RTL) inner.x += iconWidth; inner.width -= iconWidth; } // If there's still room, display the alt-text if (!inner.IsEmpty()) { nsIContent* content = GetContent(); if (content) { nsXPIDLString altText; nsCSSFrameConstructor::GetAlternateTextFor(content, content->Tag(), altText); DisplayAltText(PresContext(), aRenderingContext, altText, inner); } } aRenderingContext.PopState(); } #ifdef DEBUG static void PaintDebugImageMap(nsIFrame* aFrame, nsRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) { nsImageFrame* f = static_cast(aFrame); nsRect inner = f->GetInnerArea() + aPt; aCtx->SetColor(NS_RGB(0, 0, 0)); aCtx->PushState(); aCtx->Translate(inner.TopLeft()); f->GetImageMap()->Draw(aFrame, *aCtx); aCtx->PopState(); } #endif void nsDisplayImage::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { uint32_t flags = imgIContainer::FLAG_NONE; if (aBuilder->ShouldSyncDecodeImages()) { flags |= imgIContainer::FLAG_SYNC_DECODE; } if (aBuilder->IsPaintingToWindow()) { flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING; } static_cast(mFrame)-> PaintImage(*aCtx, ToReferenceFrame(), mVisibleRect, mImage, flags); } void nsDisplayImage::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry, nsRegion* aInvalidRegion) { if (aBuilder->ShouldSyncDecodeImages() && mImage && !mImage->IsDecoded()) { bool snap; aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap)); } nsDisplayImageContainer::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion); } already_AddRefed nsDisplayImage::GetContainer(LayerManager* aManager, nsDisplayListBuilder* aBuilder) { nsRefPtr container; nsresult rv = mImage->GetImageContainer(aManager, getter_AddRefs(container)); NS_ENSURE_SUCCESS(rv, nullptr); return container.forget(); } gfxRect nsDisplayImage::GetDestRect() { int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel(); nsImageFrame* imageFrame = static_cast(mFrame); nsRect dest = imageFrame->GetInnerArea() + ToReferenceFrame(); gfxRect destRect(dest.x, dest.y, dest.width, dest.height); destRect.ScaleInverse(factor); return destRect; } LayerState nsDisplayImage::GetLayerState(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { bool animated = false; if (!nsLayoutUtils::AnimatedImageLayersEnabled() || mImage->GetType() != imgIContainer::TYPE_RASTER || NS_FAILED(mImage->GetAnimated(&animated)) || !animated) { if (!aManager->IsCompositingCheap() || !nsLayoutUtils::GPUImageScalingEnabled()) { return 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!"); gfxRect destRect = GetDestRect(); destRect.width *= aParameters.mXScale; destRect.height *= aParameters.mYScale; // Calculate the scaling factor for the frame. gfxSize scale = gfxSize(destRect.width / imageWidth, destRect.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 LAYER_NONE; } // If the target size is pretty small, no point in using a layer. if (destRect.width * destRect.height < 64 * 64) { return LAYER_NONE; } } nsRefPtr container; mImage->GetImageContainer(aManager, getter_AddRefs(container)); if (!container) { return LAYER_NONE; } return LAYER_ACTIVE; } already_AddRefed nsDisplayImage::BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager, const ContainerLayerParameters& aParameters) { nsRefPtr container; nsresult rv = mImage->GetImageContainer(aManager, getter_AddRefs(container)); NS_ENSURE_SUCCESS(rv, nullptr); nsRefPtr layer = static_cast (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this)); if (!layer) { layer = aManager->CreateImageLayer(); if (!layer) return nullptr; } layer->SetContainer(container); ConfigureLayer(layer, aParameters.mOffset); return layer.forget(); } void nsDisplayImage::ConfigureLayer(ImageLayer *aLayer, const nsIntPoint& aOffset) { aLayer->SetFilter(nsLayoutUtils::GetGraphicsFilterForFrame(mFrame)); int32_t imageWidth; int32_t imageHeight; mImage->GetWidth(&imageWidth); mImage->GetHeight(&imageHeight); NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!"); const gfxRect destRect = GetDestRect(); gfx::Matrix transform; gfxPoint p = destRect.TopLeft() + aOffset; transform.Translate(p.x, p.y); transform.Scale(destRect.Width()/imageWidth, destRect.Height()/imageHeight); aLayer->SetBaseTransform(gfx::Matrix4x4::From2D(transform)); aLayer->SetVisibleRegion(nsIntRect(0, 0, imageWidth, imageHeight)); } void nsImageFrame::PaintImage(nsRenderingContext& aRenderingContext, nsPoint aPt, const nsRect& aDirtyRect, imgIContainer* aImage, uint32_t aFlags) { // Render the image into our content area (the area inside // the borders and padding) NS_ASSERTION(GetInnerArea().width == mComputedSize.width, "bad width"); nsRect inner = GetInnerArea() + aPt; nsRect dest(inner.TopLeft(), mComputedSize); dest.y -= GetContinuationOffset(); nsLayoutUtils::DrawSingleImage(&aRenderingContext, PresContext(), aImage, nsLayoutUtils::GetGraphicsFilterForFrame(this), dest, aDirtyRect, nullptr, aFlags); nsImageMap* map = GetImageMap(); if (nullptr != map) { aRenderingContext.PushState(); aRenderingContext.Translate(inner.TopLeft()); aRenderingContext.SetColor(NS_RGB(255, 255, 255)); aRenderingContext.SetLineStyle(nsLineStyle_kSolid); map->Draw(this, aRenderingContext); aRenderingContext.SetColor(NS_RGB(0, 0, 0)); aRenderingContext.SetLineStyle(nsLineStyle_kDotted); map->Draw(this, aRenderingContext); aRenderingContext.PopState(); } } void nsImageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { if (!IsVisibleForPainting(aBuilder)) return; DisplayBorderBackgroundOutline(aBuilder, aLists); DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(aBuilder, this, DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT); if (mComputedSize.width != 0 && mComputedSize.height != 0) { nsCOMPtr imageLoader = do_QueryInterface(mContent); NS_ASSERTION(imageLoader, "Not an image loading content?"); nsCOMPtr currentRequest; if (imageLoader) { imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(currentRequest)); } EventStates contentState = mContent->AsElement()->State(); bool imageOK = IMAGE_OK(contentState, true); // 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(new (aBuilder) nsDisplayAltFeedback(aBuilder, this)); } else { aLists.Content()->AppendNewToTop(new (aBuilder) nsDisplayImage(aBuilder, this, mImage)); // 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(new (aBuilder) nsDisplayGeneric(aBuilder, this, PaintDebugImageMap, "DebugImageMap", nsDisplayItem::TYPE_DEBUG_IMAGE_MAP)); } #endif } } if (ShouldDisplaySelection()) { DisplaySelectionOverlay(aBuilder, aLists.Content(), nsISelectionDisplay::DISPLAY_IMAGES); } } bool nsImageFrame::ShouldDisplaySelection() { // XXX what on EARTH is this code for? nsresult result; nsPresContext* presContext = PresContext(); int16_t displaySelection = presContext->PresShell()->GetSelectionFlags(); if (!(displaySelection & nsISelectionDisplay::DISPLAY_IMAGES)) return false;//no need to check the blue border, we cannot be drawn selected //insert hook here for image selection drawing #if IMAGE_EDITOR_CHECK //check to see if this frame is in an editor context //isEditor check. this needs to be changed to have better way to check if (displaySelection == nsISelectionDisplay::DISPLAY_ALL) { nsCOMPtr selCon; result = GetSelectionController(presContext, getter_AddRefs(selCon)); if (NS_SUCCEEDED(result) && selCon) { nsCOMPtr selection; result = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection)); if (NS_SUCCEEDED(result) && selection) { int32_t rangeCount; selection->GetRangeCount(&rangeCount); if (rangeCount == 1) //if not one then let code drop to nsFrame::Paint { nsCOMPtr parentContent = mContent->GetParent(); if (parentContent) { int32_t thisOffset = parentContent->IndexOf(mContent); nsCOMPtr parentNode = do_QueryInterface(parentContent); nsCOMPtr rangeNode; int32_t rangeOffset; nsCOMPtr range; selection->GetRangeAt(0,getter_AddRefs(range)); if (range) { range->GetStartContainer(getter_AddRefs(rangeNode)); range->GetStartOffset(&rangeOffset); if (parentNode && rangeNode && (rangeNode == parentNode) && rangeOffset == thisOffset) { range->GetEndContainer(getter_AddRefs(rangeNode)); range->GetEndOffset(&rangeOffset); if ((rangeNode == parentNode) && (rangeOffset == (thisOffset +1))) //+1 since that would mean this whole content is selected only return false; //do not allow nsFrame do draw any further selection } } } } } } } #endif return true; } nsImageMap* nsImageFrame::GetImageMap() { if (!mImageMap) { nsIContent* map = GetMapElement(); if (map) { mImageMap = new nsImageMap(); NS_ADDREF(mImageMap); mImageMap->Init(this, map); } } return mImageMap; } bool nsImageFrame::IsServerImageMap() { return mContent->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 link(do_QueryInterface(content)); if (link) { nsCOMPtr href = content->GetHrefURI(); if (href) { href->Clone(aHref); } status = (*aHref != nullptr); nsCOMPtr anchor(do_QueryInterface(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() ? nsIPresShell::GetCapturingContent() : nullptr; if (capturingContent && capturingContent->GetPrimaryFrame() == this) { *aContent = capturingContent; NS_IF_ADDREF(*aContent); return NS_OK; } nsImageMap* map = GetImageMap(); if (nullptr != map) { nsIntPoint p; TranslateEventCoords( nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this), p); nsCOMPtr 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->message == NS_MOUSE_BUTTON_UP && aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) || aEvent->message == NS_MOUSE_MOVE) { nsImageMap* map = GetImageMap(); bool isServerMap = IsServerImageMap(); if ((nullptr != map) || isServerMap) { nsIntPoint p; TranslateEventCoords( nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, 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 uri; nsAutoString target; nsCOMPtr 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; uri->GetSpec(spec); spec += nsPrintfCString("?%d,%d", p.x, p.y); uri->SetSpec(spec); bool clicked = false; if (aEvent->message == NS_MOUSE_BUTTON_UP) { *aEventStatus = nsEventStatus_eConsumeDoDefault; clicked = true; } nsContentUtils::TriggerLink(anchorNode, aPresContext, uri, target, clicked, true, true); } } } } return nsSplittableFrame::HandleEvent(aPresContext, aEvent, aEventStatus); } nsresult nsImageFrame::GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor) { nsImageMap* map = GetImageMap(); if (nullptr != map) { nsIntPoint p; TranslateEventCoords(aPoint, p); nsCOMPtr area = map->GetArea(p.x, p.y); if (area) { // Use the cursor from the style of the *area* element. // XXX Using the image as the parent style context isn't // technically correct, but it's probably the right thing to do // here, since it means that areas on which the cursor isn't // specified will inherit the style from the image. nsRefPtr areaStyle = PresContext()->PresShell()->StyleSet()-> ResolveStyleFor(area->AsElement(), StyleContext()); FillCursorInformationFromStyle(areaStyle->StyleUserInterface(), aCursor); if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) { aCursor.mCursor = NS_STYLE_CURSOR_DEFAULT; } return NS_OK; } } return nsFrame::GetCursor(aPoint, aCursor); } nsresult nsImageFrame::AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) { nsresult rv = nsSplittableFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType); if (NS_FAILED(rv)) { return rv; } if (nsGkAtoms::alt == aAttribute) { PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); } return NS_OK; } nsIAtom* nsImageFrame::GetType() const { return nsGkAtoms::imageFrame; } #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, uint32_t aFlags) const { nsCString str; ListGeneric(str, aPrefix, aFlags); // output the img src url nsCOMPtr imageLoader = do_QueryInterface(mContent); if (imageLoader) { nsCOMPtr currentRequest; imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, getter_AddRefs(currentRequest)); if (currentRequest) { nsCOMPtr 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 int nsImageFrame::GetLogicalSkipSides(const nsHTMLReflowState* aReflowState) const { if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak == NS_STYLE_BOX_DECORATION_BREAK_CLONE)) { return 0; } int skip = 0; if (nullptr != GetPrevInFlow()) { skip |= LOGICAL_SIDE_B_START; } if (nullptr != GetNextInFlow()) { skip |= LOGICAL_SIDE_B_END; } return skip; } nsresult nsImageFrame::GetIntrinsicImageSize(nsSize& aSize) { if (mIntrinsicSize.width.GetUnit() == eStyleUnit_Coord && mIntrinsicSize.height.GetUnit() == eStyleUnit_Coord) { aSize.SizeTo(mIntrinsicSize.width.GetCoordValue(), mIntrinsicSize.height.GetCoordValue()); return NS_OK; } return NS_ERROR_FAILURE; } nsresult nsImageFrame::LoadIcon(const nsAString& aSpec, nsPresContext *aPresContext, imgRequestProxy** aRequest) { nsresult rv = NS_OK; NS_PRECONDITION(!aSpec.IsEmpty(), "What happened??"); if (!sIOService) { rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService); NS_ENSURE_SUCCESS(rv, rv); } nsCOMPtr realURI; SpecToURI(aSpec, sIOService, getter_AddRefs(realURI)); nsRefPtr il = nsContentUtils::GetImgLoaderForDocument(aPresContext->Document()); nsCOMPtr loadGroup; GetLoadGroup(aPresContext, getter_AddRefs(loadGroup)); // For icon loads, we don't need to merge with the loadgroup flags nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL; 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) */ loadGroup, gIconLoad, nullptr, /* Not associated with any particular document */ loadFlags, nullptr, nullptr, /* channel policy not needed */ EmptyString(), aRequest); } void nsImageFrame::GetDocumentCharacterSet(nsACString& aCharset) const { if (mContent) { NS_ASSERTION(mContent->GetDocument(), "Frame still alive after content removed from document!"); aCharset = mContent->GetDocument()->GetDocumentCharacterSet(); } } void nsImageFrame::SpecToURI(const nsAString& aSpec, nsIIOService *aIOService, nsIURI **aURI) { nsCOMPtr baseURI; if (mContent) { baseURI = mContent->GetBaseURI(); } nsAutoCString charset; GetDocumentCharacterSet(charset); NS_NewURI(aURI, aSpec, charset.IsEmpty() ? nullptr : charset.get(), baseURI, aIOService); } void nsImageFrame::GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup) { if (!aPresContext) return; NS_PRECONDITION(nullptr != aLoadGroup, "null OUT parameter pointer"); nsIPresShell *shell = aPresContext->GetPresShell(); if (!shell) return; nsIDocument *doc = shell->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(); NS_ADDREF(gIconLoad); 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)); return rv; } NS_IMPL_ISUPPORTS(nsImageFrame::IconLoad, nsIObserver, imgINotificationObserver) static const char* kIconLoadPrefs[] = { "browser.display.force_inline_alttext", "browser.display.show_image_placeholders", 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. for (uint32_t i = 0; i < ArrayLength(kIconLoadPrefs) || (NS_NOTREACHED("wrong pref"), false); ++i) if (NS_ConvertASCIItoUTF16(kIconLoadPrefs[i]) == nsDependentString(aData)) break; #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); } NS_IMETHODIMP nsImageFrame::IconLoad::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData) { if (aType != imgINotificationObserver::LOAD_COMPLETE && aType != imgINotificationObserver::FRAME_UPDATE) { return NS_OK; } nsTObserverArray::ForwardIterator iter(mIconObservers); nsImageFrame *frame; while (iter.HasMore()) { frame = iter.GetNext(); frame->InvalidateFrame(); } return NS_OK; } NS_IMPL_ISUPPORTS(nsImageListener, imgINotificationObserver) nsImageListener::nsImageListener(nsImageFrame *aFrame) : mFrame(aFrame) { } nsImageListener::~nsImageListener() { } NS_IMETHODIMP nsImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData) { if (!mFrame) return NS_ERROR_FAILURE; 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->StyleContext()->GetPseudo() == nsCSSAnonBoxes::cellContent) { // Assume direct parent is a table cell frame. nsFrame *grandAncestor = static_cast(ancestor->GetParent()); return grandAncestor && grandAncestor->StylePosition()->mWidth.GetUnit() == eStyleUnit_Auto; } return false; } /* virtual */ void nsImageFrame::AddInlineMinWidth(nsRenderingContext *aRenderingContext, nsIFrame::InlineMinWidthData *aData) { NS_ASSERTION(GetParent(), "Must have a parent if we get here!"); nsIFrame* parent = GetParent(); bool canBreak = !CanContinueTextRun() && parent->StyleText()->WhiteSpaceCanWrap(parent) && !IsInAutoWidthTableCellForQuirk(this); if (canBreak) aData->OptionallyBreak(aRenderingContext); aData->trailingWhitespace = 0; aData->skipWhitespace = false; aData->trailingTextFrame = nullptr; aData->currentLine += nsLayoutUtils::IntrinsicForContainer(aRenderingContext, this, nsLayoutUtils::MIN_WIDTH); aData->atStartOfLine = false; if (canBreak) aData->OptionallyBreak(aRenderingContext); }