| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com) |
| * (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2003-2021 Apple Inc. All rights reserved. |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "RenderImage.h" |
| |
| #include "AXObjectCache.h" |
| #include "BitmapImage.h" |
| #include "CachedImage.h" |
| #include "DocumentInlines.h" |
| #include "FocusController.h" |
| #include "FontCache.h" |
| #include "FontCascade.h" |
| #include "Frame.h" |
| #include "FrameSelection.h" |
| #include "GeometryUtilities.h" |
| #include "GraphicsContext.h" |
| #include "HTMLAreaElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLInputElement.h" |
| #include "HTMLMapElement.h" |
| #include "HTMLNames.h" |
| #include "HitTestResult.h" |
| #include "ImageOverlay.h" |
| #include "InlineIteratorInlineBox.h" |
| #include "InlineIteratorLine.h" |
| #include "Page.h" |
| #include "PaintInfo.h" |
| #include "RenderChildIterator.h" |
| #include "RenderFragmentedFlow.h" |
| #include "RenderImageResourceStyleImage.h" |
| #include "RenderLayoutState.h" |
| #include "RenderTheme.h" |
| #include "RenderView.h" |
| #include "RuntimeEnabledFeatures.h" |
| #include "SVGElementTypeHelpers.h" |
| #include "SVGImage.h" |
| #include "Settings.h" |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/StackStats.h> |
| |
| #if PLATFORM(IOS_FAMILY) |
| #include "LogicalSelectionOffsetCaches.h" |
| #include "SelectionGeometry.h" |
| #endif |
| |
| #if USE(CG) |
| #include "PDFDocumentImage.h" |
| #include "Settings.h" |
| #endif |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderImage); |
| |
| #if PLATFORM(IOS_FAMILY) |
| // FIXME: This doesn't behave correctly for floating or positioned images, but WebCore doesn't handle those well |
| // during selection creation yet anyway. |
| // FIXME: We can't tell whether or not we contain the start or end of the selected Range using only the offsets |
| // of the start and end, we need to know the whole Position. |
| void RenderImage::collectSelectionGeometries(Vector<SelectionGeometry>& geometries, unsigned, unsigned) |
| { |
| RenderBlock* containingBlock = this->containingBlock(); |
| |
| IntRect imageRect; |
| // FIXME: It doesn't make sense to package line bounds into SelectionGeometry. We should find |
| // the right and left extent of the selection once for the entire selected Range, perhaps |
| // using the Range's common ancestor. |
| IntRect lineExtentRect; |
| bool isFirstOnLine = false; |
| bool isLastOnLine = false; |
| |
| auto run = InlineIterator::boxFor(*this); |
| if (!run) { |
| // This is a block image. |
| imageRect = IntRect(0, 0, width(), height()); |
| isFirstOnLine = true; |
| isLastOnLine = true; |
| lineExtentRect = imageRect; |
| if (containingBlock->isHorizontalWritingMode()) { |
| lineExtentRect.setX(containingBlock->x()); |
| lineExtentRect.setWidth(containingBlock->width()); |
| } else { |
| lineExtentRect.setY(containingBlock->y()); |
| lineExtentRect.setHeight(containingBlock->height()); |
| } |
| } else { |
| auto line = run->line(); |
| LayoutUnit selectionTop = !containingBlock->style().isFlippedBlocksWritingMode() ? line->selectionTop() - logicalTop() : logicalBottom() - line->selectionBottom(); |
| imageRect = IntRect(0, selectionTop, logicalWidth(), line->selectionHeight()); |
| isFirstOnLine = !run->previousOnLine(); |
| isLastOnLine = !run->nextOnLine(); |
| LogicalSelectionOffsetCaches cache(*containingBlock); |
| LayoutUnit leftOffset = containingBlock->logicalLeftSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache); |
| LayoutUnit rightOffset = containingBlock->logicalRightSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache); |
| lineExtentRect = IntRect(leftOffset - logicalLeft(), imageRect.y(), rightOffset - leftOffset, imageRect.height()); |
| if (!run->isHorizontal()) { |
| imageRect = imageRect.transposedRect(); |
| lineExtentRect = lineExtentRect.transposedRect(); |
| } |
| } |
| |
| bool isFixed = false; |
| auto absoluteQuad = localToAbsoluteQuad(FloatRect(imageRect), UseTransforms, &isFixed); |
| auto lineExtentBounds = localToAbsoluteQuad(FloatRect(lineExtentRect)).enclosingBoundingBox(); |
| if (!containingBlock->isHorizontalWritingMode()) |
| lineExtentBounds = lineExtentBounds.transposedRect(); |
| |
| // FIXME: We should consider either making SelectionGeometry a struct or better organize its optional fields into |
| // an auxiliary struct to simplify its initialization. |
| geometries.append(SelectionGeometry(absoluteQuad, SelectionRenderingBehavior::CoalesceBoundingRects, containingBlock->style().direction(), lineExtentBounds.x(), lineExtentBounds.maxX(), lineExtentBounds.maxY(), 0, false /* line break */, isFirstOnLine, isLastOnLine, false /* contains start */, false /* contains end */, containingBlock->style().isHorizontalWritingMode(), isFixed, false /* ruby text */, view().pageNumberForBlockProgressionOffset(absoluteQuad.enclosingBoundingBox().x()))); |
| } |
| #endif |
| |
| using namespace HTMLNames; |
| |
| RenderImage::RenderImage(Element& element, RenderStyle&& style, StyleImage* styleImage, const float imageDevicePixelRatio) |
| : RenderReplaced(element, WTFMove(style), IntSize()) |
| , m_imageResource(styleImage ? makeUnique<RenderImageResourceStyleImage>(*styleImage) : makeUnique<RenderImageResource>()) |
| , m_hasImageOverlay(is<HTMLElement>(element) && ImageOverlay::hasOverlay(downcast<HTMLElement>(element))) |
| , m_imageDevicePixelRatio(imageDevicePixelRatio) |
| { |
| updateAltText(); |
| #if ENABLE(SERVICE_CONTROLS) |
| if (is<HTMLImageElement>(element)) |
| m_hasShadowControls = downcast<HTMLImageElement>(element).imageMenuEnabled(); |
| #endif |
| } |
| |
| RenderImage::RenderImage(Document& document, RenderStyle&& style, StyleImage* styleImage) |
| : RenderReplaced(document, WTFMove(style), IntSize()) |
| , m_imageResource(styleImage ? makeUnique<RenderImageResourceStyleImage>(*styleImage) : makeUnique<RenderImageResource>()) |
| { |
| } |
| |
| RenderImage::~RenderImage() |
| { |
| // Do not add any code here. Add it to willBeDestroyed() instead. |
| } |
| |
| void RenderImage::willBeDestroyed() |
| { |
| imageResource().shutdown(); |
| RenderReplaced::willBeDestroyed(); |
| } |
| |
| // If we'll be displaying either alt text or an image, add some padding. |
| static const unsigned short paddingWidth = 4; |
| static const unsigned short paddingHeight = 4; |
| |
| // Alt text is restricted to this maximum size, in pixels. These are |
| // signed integers because they are compared with other signed values. |
| static const float maxAltTextWidth = 1024; |
| static const int maxAltTextHeight = 256; |
| |
| IntSize RenderImage::imageSizeForError(CachedImage* newImage) const |
| { |
| ASSERT_ARG(newImage, newImage); |
| ASSERT_ARG(newImage, newImage->imageForRenderer(this)); |
| |
| FloatSize imageSize; |
| if (newImage->willPaintBrokenImage()) { |
| std::pair<Image*, float> brokenImageAndImageScaleFactor = newImage->brokenImage(document().deviceScaleFactor()); |
| imageSize = brokenImageAndImageScaleFactor.first->size(); |
| imageSize.scale(1 / brokenImageAndImageScaleFactor.second); |
| } else |
| imageSize = newImage->imageForRenderer(this)->size(); |
| |
| // imageSize() returns 0 for the error image. We need the true size of the |
| // error image, so we have to get it by grabbing image() directly. |
| return IntSize(paddingWidth + imageSize.width() * style().effectiveZoom(), paddingHeight + imageSize.height() * style().effectiveZoom()); |
| } |
| |
| // Sets the image height and width to fit the alt text. Returns true if the |
| // image size changed. |
| ImageSizeChangeType RenderImage::setImageSizeForAltText(CachedImage* newImage /* = 0 */) |
| { |
| IntSize imageSize; |
| if (newImage && newImage->imageForRenderer(this)) |
| imageSize = imageSizeForError(newImage); |
| else if (!m_altText.isEmpty() || newImage) { |
| // If we'll be displaying either text or an image, add a little padding. |
| imageSize = IntSize(paddingWidth, paddingHeight); |
| } |
| |
| // we have an alt and the user meant it (its not a text we invented) |
| if (!m_altText.isEmpty()) { |
| const FontCascade& font = style().fontCascade(); |
| IntSize paddedTextSize(paddingWidth + std::min(ceilf(font.width(RenderBlock::constructTextRun(m_altText, style()))), maxAltTextWidth), paddingHeight + std::min(font.fontMetrics().height(), maxAltTextHeight)); |
| imageSize = imageSize.expandedTo(paddedTextSize); |
| } |
| |
| if (imageSize == intrinsicSize()) |
| return ImageSizeChangeNone; |
| |
| setIntrinsicSize(imageSize); |
| return ImageSizeChangeForAltText; |
| } |
| |
| void RenderImage::styleWillChange(StyleDifference diff, const RenderStyle& newStyle) |
| { |
| if (!hasInitializedStyle()) |
| imageResource().initialize(*this); |
| RenderReplaced::styleWillChange(diff, newStyle); |
| } |
| |
| void RenderImage::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| RenderReplaced::styleDidChange(diff, oldStyle); |
| if (m_needsToSetSizeForAltText) { |
| if (!m_altText.isEmpty() && setImageSizeForAltText(cachedImage())) |
| repaintOrMarkForLayout(ImageSizeChangeForAltText); |
| m_needsToSetSizeForAltText = false; |
| } |
| if (diff == StyleDifference::Layout && oldStyle && oldStyle->imageOrientation() != style().imageOrientation()) |
| return repaintOrMarkForLayout(ImageSizeChangeNone); |
| |
| #if ENABLE(CSS_IMAGE_RESOLUTION) |
| if (diff == StyleDifference::Layout && oldStyle |
| && (oldStyle->imageResolution() != style().imageResolution() |
| || oldStyle->imageResolutionSnap() != style().imageResolutionSnap() |
| || oldStyle->imageResolutionSource() != style().imageResolutionSource())) |
| repaintOrMarkForLayout(ImageSizeChangeNone); |
| #endif |
| } |
| |
| bool RenderImage::shouldCollapseToEmpty() const |
| { |
| auto imageRepresentsNothing = [&] { |
| if (!element()->hasAttribute(HTMLNames::altAttr)) |
| return false; |
| return imageResource().errorOccurred() && m_altText.isEmpty(); |
| }; |
| if (!element()) { |
| // Images with no associated elements do not fall under the category of unwanted content. |
| return false; |
| } |
| if (!isInline()) |
| return false; |
| if (!imageRepresentsNothing()) |
| return false; |
| return document().inNoQuirksMode() || (style().logicalWidth().isAuto() && style().logicalHeight().isAuto()); |
| } |
| |
| LayoutUnit RenderImage::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const |
| { |
| if (shouldCollapseToEmpty()) |
| return { }; |
| return RenderReplaced::computeReplacedLogicalWidth(shouldComputePreferred); |
| } |
| |
| LayoutUnit RenderImage::computeReplacedLogicalHeight(std::optional<LayoutUnit> estimatedUsedWidth) const |
| { |
| if (shouldCollapseToEmpty()) |
| return { }; |
| return RenderReplaced::computeReplacedLogicalHeight(estimatedUsedWidth); |
| } |
| |
| void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect) |
| { |
| if (renderTreeBeingDestroyed()) |
| return; |
| |
| if (hasVisibleBoxDecorations() || hasMask() || hasShapeOutside()) |
| RenderReplaced::imageChanged(newImage, rect); |
| |
| if (shouldCollapseToEmpty()) { |
| // Image might need resizing when we are at the final state. |
| setNeedsLayout(); |
| } |
| |
| if (newImage != imageResource().imagePtr() || !newImage) |
| return; |
| |
| // At a zoom level of 1 the image is guaranteed to have an integer size. |
| incrementVisuallyNonEmptyPixelCountIfNeeded(flooredIntSize(imageResource().imageSize(1.0f))); |
| |
| ImageSizeChangeType imageSizeChange = ImageSizeChangeNone; |
| |
| // Set image dimensions, taking into account the size of the alt text. |
| if (imageResource().errorOccurred()) { |
| if (!m_altText.isEmpty() && document().hasPendingStyleRecalc()) { |
| ASSERT(element()); |
| if (element()) { |
| m_needsToSetSizeForAltText = true; |
| element()->invalidateStyle(); |
| } |
| return; |
| } |
| imageSizeChange = setImageSizeForAltText(cachedImage()); |
| } |
| repaintOrMarkForLayout(imageSizeChange, rect); |
| if (AXObjectCache* cache = document().existingAXObjectCache()) |
| cache->deferRecomputeIsIgnoredIfNeeded(element()); |
| } |
| |
| void RenderImage::updateIntrinsicSizeIfNeeded(const LayoutSize& newSize) |
| { |
| if (imageResource().errorOccurred() || !m_imageResource->cachedImage()) |
| return; |
| setIntrinsicSize(newSize); |
| } |
| |
| void RenderImage::updateInnerContentRect() |
| { |
| // Propagate container size to image resource. |
| IntSize containerSize(replacedContentRect().size()); |
| if (!containerSize.isEmpty()) { |
| URL imageSourceURL; |
| if (auto* imageElement = dynamicDowncast<HTMLImageElement>(element())) |
| imageSourceURL = document().completeURL(imageElement->imageSourceURL()); |
| imageResource().setContainerContext(containerSize, imageSourceURL); |
| } |
| } |
| |
| void RenderImage::repaintOrMarkForLayout(ImageSizeChangeType imageSizeChange, const IntRect* rect) |
| { |
| #if ENABLE(CSS_IMAGE_RESOLUTION) |
| double scale = style().imageResolution(); |
| if (style().imageResolutionSnap() == ImageResolutionSnap::Pixels) |
| scale = roundForImpreciseConversion<int>(scale); |
| if (scale <= 0) |
| scale = 1; |
| LayoutSize newIntrinsicSize = imageResource().intrinsicSize(style().effectiveZoom() / scale); |
| #else |
| LayoutSize newIntrinsicSize = imageResource().intrinsicSize(style().effectiveZoom()); |
| #endif |
| LayoutSize oldIntrinsicSize = intrinsicSize(); |
| |
| updateIntrinsicSizeIfNeeded(newIntrinsicSize); |
| |
| // In the case of generated image content using :before/:after/content, we might not be |
| // in the render tree yet. In that case, we just need to update our intrinsic size. |
| // layout() will be called after we are inserted in the tree which will take care of |
| // what we are doing here. |
| if (!containingBlock()) |
| return; |
| |
| bool imageSourceHasChangedSize = oldIntrinsicSize != newIntrinsicSize || imageSizeChange != ImageSizeChangeNone; |
| |
| if (imageSourceHasChangedSize && setNeedsLayoutIfNeededAfterIntrinsicSizeChange()) |
| return; |
| |
| if (everHadLayout() && !selfNeedsLayout()) { |
| // The inner content rectangle is calculated during layout, but may need an update now |
| // (unless the box has already been scheduled for layout). In order to calculate it, we |
| // may need values from the containing block, though, so make sure that we're not too |
| // early. It may be that layout hasn't even taken place once yet. |
| |
| // FIXME: we should not have to trigger another call to setContainerContextForRenderer() |
| // from here, since it's already being done during layout. |
| updateInnerContentRect(); |
| } |
| |
| LayoutRect repaintRect = contentBoxRect(); |
| if (rect) { |
| // The image changed rect is in source image coordinates (pre-zooming), |
| // so map from the bounds of the image to the contentsBox. |
| repaintRect.intersect(enclosingIntRect(mapRect(*rect, FloatRect(FloatPoint(), imageResource().imageSize(1.0f)), repaintRect))); |
| } |
| |
| repaintRectangle(repaintRect); |
| |
| // Tell any potential compositing layers that the image needs updating. |
| contentChanged(ImageChanged); |
| } |
| |
| void RenderImage::notifyFinished(CachedResource& newImage, const NetworkLoadMetrics& metrics) |
| { |
| if (renderTreeBeingDestroyed()) |
| return; |
| |
| invalidateBackgroundObscurationStatus(); |
| |
| if (&newImage == cachedImage()) { |
| // tell any potential compositing layers |
| // that the image is done and they can reference it directly. |
| contentChanged(ImageChanged); |
| } |
| |
| if (is<HTMLImageElement>(element())) |
| page().didFinishLoadingImageForElement(downcast<HTMLImageElement>(*element())); |
| |
| RenderReplaced::notifyFinished(newImage, metrics); |
| } |
| |
| void RenderImage::setImageDevicePixelRatio(float factor) |
| { |
| if (m_imageDevicePixelRatio == factor) |
| return; |
| |
| m_imageDevicePixelRatio = factor; |
| intrinsicSizeChanged(); |
| } |
| |
| bool RenderImage::isShowingMissingOrImageError() const |
| { |
| return !imageResource().cachedImage() || imageResource().errorOccurred(); |
| } |
| |
| bool RenderImage::isShowingAltText() const |
| { |
| return isShowingMissingOrImageError() && !m_altText.isEmpty(); |
| } |
| |
| bool RenderImage::shouldDisplayBrokenImageIcon() const |
| { |
| return imageResource().errorOccurred(); |
| } |
| |
| bool RenderImage::hasNonBitmapImage() const |
| { |
| if (!imageResource().cachedImage()) |
| return false; |
| |
| Image* image = cachedImage()->imageForRenderer(this); |
| return image && !is<BitmapImage>(image); |
| } |
| |
| void RenderImage::paintIncompleteImageOutline(PaintInfo& paintInfo, LayoutPoint paintOffset, LayoutUnit borderWidth) const |
| { |
| auto contentSize = this->contentSize(); |
| if (contentSize.width() <= 2 || contentSize.height() <= 2) |
| return; |
| |
| auto leftBorder = borderLeft(); |
| auto topBorder = borderTop(); |
| auto leftPadding = paddingLeft(); |
| auto topPadding = paddingTop(); |
| |
| // Draw an outline rect where the image should be. |
| GraphicsContext& context = paintInfo.context(); |
| context.setStrokeStyle(SolidStroke); |
| context.setStrokeColor(Color::lightGray); |
| context.setFillColor(Color::transparentBlack); |
| context.drawRect(snapRectToDevicePixels(LayoutRect({ paintOffset.x() + leftBorder + leftPadding, paintOffset.y() + topBorder + topPadding }, contentSize), document().deviceScaleFactor()), borderWidth); |
| } |
| |
| static bool isDeferredImage(Element* element) |
| { |
| return is<HTMLImageElement>(element) && downcast<HTMLImageElement>(element)->isDeferred(); |
| } |
| |
| void RenderImage::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| GraphicsContext& context = paintInfo.context(); |
| if (context.invalidatingImagesWithAsyncDecodes()) { |
| if (cachedImage() && cachedImage()->isClientWaitingForAsyncDecoding(*this)) |
| cachedImage()->removeAllClientsWaitingForAsyncDecoding(); |
| return; |
| } |
| |
| auto contentSize = this->contentSize(); |
| float deviceScaleFactor = document().deviceScaleFactor(); |
| LayoutUnit missingImageBorderWidth(1 / deviceScaleFactor); |
| |
| if (context.detectingContentfulPaint()) { |
| if (!context.contenfulPaintDetected() && !isDeferredImage(element()) && cachedImage() && cachedImage()->canRender(this, deviceScaleFactor) && !contentSize.isEmpty()) |
| context.setContentfulPaintDetected(); |
| |
| return; |
| } |
| |
| if (!imageResource().cachedImage() || isDeferredImage(element()) || shouldDisplayBrokenImageIcon()) { |
| if (paintInfo.phase == PaintPhase::Selection) |
| return; |
| |
| if (paintInfo.phase == PaintPhase::Foreground) |
| page().addRelevantUnpaintedObject(this, visualOverflowRect()); |
| |
| paintIncompleteImageOutline(paintInfo, paintOffset, missingImageBorderWidth); |
| |
| if (contentSize.width() > 2 && contentSize.height() > 2) { |
| LayoutUnit leftBorder = borderLeft(); |
| LayoutUnit topBorder = borderTop(); |
| LayoutUnit leftPad = paddingLeft(); |
| LayoutUnit topPad = paddingTop(); |
| |
| bool errorPictureDrawn = false; |
| LayoutSize imageOffset; |
| // When calculating the usable dimensions, exclude the pixels of |
| // the outline rect so the error image/alt text doesn't draw on it. |
| LayoutSize usableSize = contentSize - LayoutSize(2 * missingImageBorderWidth, 2 * missingImageBorderWidth); |
| |
| RefPtr<Image> image = imageResource().image(); |
| |
| if (shouldDisplayBrokenImageIcon() && !image->isNull() && usableSize.width() >= image->width() && usableSize.height() >= image->height()) { |
| // Call brokenImage() explicitly to ensure we get the broken image icon at the appropriate resolution. |
| std::pair<Image*, float> brokenImageAndImageScaleFactor = cachedImage()->brokenImage(deviceScaleFactor); |
| image = brokenImageAndImageScaleFactor.first; |
| FloatSize imageSize = image->size(); |
| imageSize.scale(1 / brokenImageAndImageScaleFactor.second); |
| |
| // Center the error image, accounting for border and padding. |
| LayoutUnit centerX { (usableSize.width() - imageSize.width()) / 2 }; |
| if (centerX < 0) |
| centerX = 0; |
| LayoutUnit centerY { (usableSize.height() - imageSize.height()) / 2 }; |
| if (centerY < 0) |
| centerY = 0; |
| imageOffset = LayoutSize(leftBorder + leftPad + centerX + missingImageBorderWidth, topBorder + topPad + centerY + missingImageBorderWidth); |
| |
| context.drawImage(*image, snapRectToDevicePixels(LayoutRect(paintOffset + imageOffset, imageSize), deviceScaleFactor), { imageOrientation() }); |
| errorPictureDrawn = true; |
| } |
| |
| if (!m_altText.isEmpty()) { |
| String text = document().displayStringModifiedByEncoding(m_altText); |
| context.setFillColor(style().visitedDependentColorWithColorFilter(CSSPropertyColor)); |
| const FontCascade& font = style().fontCascade(); |
| const FontMetrics& fontMetrics = font.fontMetrics(); |
| LayoutUnit ascent = fontMetrics.ascent(); |
| LayoutPoint altTextOffset = paintOffset; |
| altTextOffset.move(leftBorder + leftPad + (paddingWidth / 2) - missingImageBorderWidth, topBorder + topPad + ascent + (paddingHeight / 2) - missingImageBorderWidth); |
| |
| // Only draw the alt text if it'll fit within the content box, |
| // and only if it fits above the error image. |
| TextRun textRun = RenderBlock::constructTextRun(text, style()); |
| LayoutUnit textWidth { font.width(textRun) }; |
| if (errorPictureDrawn) { |
| if (usableSize.width() >= textWidth && fontMetrics.height() <= imageOffset.height()) |
| context.drawBidiText(font, textRun, altTextOffset); |
| } else if (usableSize.width() >= textWidth && usableSize.height() >= fontMetrics.height()) |
| context.drawBidiText(font, textRun, altTextOffset); |
| } |
| } |
| return; |
| } |
| |
| if (contentSize.isEmpty()) |
| return; |
| |
| bool showBorderForIncompleteImage = settings().incompleteImageBorderEnabled(); |
| |
| RefPtr<Image> img = imageResource().image(flooredIntSize(contentSize)); |
| if (!img || img->isNull()) { |
| if (showBorderForIncompleteImage) |
| paintIncompleteImageOutline(paintInfo, paintOffset, missingImageBorderWidth); |
| |
| if (paintInfo.phase == PaintPhase::Foreground) |
| page().addRelevantUnpaintedObject(this, visualOverflowRect()); |
| return; |
| } |
| |
| LayoutRect contentBoxRect = this->contentBoxRect(); |
| contentBoxRect.moveBy(paintOffset); |
| LayoutRect replacedContentRect = this->replacedContentRect(); |
| replacedContentRect.moveBy(paintOffset); |
| bool clip = !contentBoxRect.contains(replacedContentRect); |
| GraphicsContextStateSaver stateSaver(context, clip); |
| if (clip) |
| context.clip(contentBoxRect); |
| |
| ImageDrawResult result = paintIntoRect(paintInfo, snapRectToDevicePixels(replacedContentRect, deviceScaleFactor)); |
| |
| if (showBorderForIncompleteImage && (result != ImageDrawResult::DidDraw || (cachedImage() && cachedImage()->isLoading()))) |
| paintIncompleteImageOutline(paintInfo, paintOffset, missingImageBorderWidth); |
| |
| if (cachedImage() && paintInfo.phase == PaintPhase::Foreground) { |
| // For now, count images as unpainted if they are still progressively loading. We may want |
| // to refine this in the future to account for the portion of the image that has painted. |
| LayoutRect visibleRect = intersection(replacedContentRect, contentBoxRect); |
| if (cachedImage()->isLoading() || result == ImageDrawResult::DidRequestDecoding) |
| page().addRelevantUnpaintedObject(this, visibleRect); |
| else |
| page().addRelevantRepaintedObject(this, visibleRect); |
| } |
| } |
| |
| void RenderImage::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| RenderReplaced::paint(paintInfo, paintOffset); |
| |
| if (paintInfo.phase == PaintPhase::Outline) |
| paintAreaElementFocusRing(paintInfo, paintOffset); |
| } |
| |
| void RenderImage::paintAreaElementFocusRing(PaintInfo& paintInfo, const LayoutPoint& paintOffset) |
| { |
| if (document().printing() || !frame().selection().isFocusedAndActive()) |
| return; |
| |
| if (paintInfo.context().paintingDisabled() && !paintInfo.context().performingPaintInvalidation()) |
| return; |
| |
| Element* focusedElement = document().focusedElement(); |
| if (!is<HTMLAreaElement>(focusedElement)) |
| return; |
| |
| HTMLAreaElement& areaElement = downcast<HTMLAreaElement>(*focusedElement); |
| if (areaElement.imageElement() != element()) |
| return; |
| |
| auto* areaElementStyle = areaElement.computedStyle(); |
| if (!areaElementStyle) |
| return; |
| |
| float outlineWidth = areaElementStyle->outlineWidth(); |
| if (!outlineWidth) |
| return; |
| |
| // Even if the theme handles focus ring drawing for entire elements, it won't do it for |
| // an area within an image, so we don't call RenderTheme::supportsFocusRing here. |
| auto path = areaElement.computePathForFocusRing(size()); |
| if (path.isEmpty()) |
| return; |
| |
| AffineTransform zoomTransform; |
| zoomTransform.scale(style().effectiveZoom()); |
| path.transform(zoomTransform); |
| |
| auto adjustedOffset = paintOffset; |
| adjustedOffset.moveBy(location()); |
| path.translate(toFloatSize(adjustedOffset)); |
| |
| #if PLATFORM(MAC) |
| bool needsRepaint; |
| paintInfo.context().drawFocusRing(path, page().focusController().timeSinceFocusWasSet().seconds(), needsRepaint, RenderTheme::singleton().focusRingColor(styleColorOptions())); |
| if (needsRepaint) |
| page().focusController().setFocusedElementNeedsRepaint(); |
| #else |
| paintInfo.context().drawFocusRing(path, outlineWidth, areaElementStyle->outlineOffset(), areaElementStyle->visitedDependentColorWithColorFilter(CSSPropertyOutlineColor)); |
| #endif // PLATFORM(MAC) |
| } |
| |
| void RenderImage::areaElementFocusChanged(HTMLAreaElement* element) |
| { |
| ASSERT_UNUSED(element, element->imageElement() == this->element()); |
| |
| // It would be more efficient to only repaint the focus ring rectangle |
| // for the passed-in area element. That would require adding functions |
| // to the area element class. |
| repaint(); |
| } |
| |
| ImageDrawResult RenderImage::paintIntoRect(PaintInfo& paintInfo, const FloatRect& rect) |
| { |
| if (!imageResource().cachedImage() || imageResource().errorOccurred() || rect.width() <= 0 || rect.height() <= 0) |
| return ImageDrawResult::DidNothing; |
| |
| RefPtr<Image> img = imageResource().image(flooredIntSize(rect.size())); |
| if (!img || img->isNull()) |
| return ImageDrawResult::DidNothing; |
| |
| auto* imageElement = dynamicDowncast<HTMLImageElement>(element()); |
| |
| // FIXME: Document when image != img.get(). |
| Image* image = imageResource().image().get(); |
| |
| #if USE(CG) |
| if (is<PDFDocumentImage>(image)) |
| downcast<PDFDocumentImage>(*image).setPdfImageCachingPolicy(settings().pdfImageCachingPolicy()); |
| #endif |
| |
| if (is<BitmapImage>(image)) |
| downcast<BitmapImage>(*image).updateFromSettings(settings()); |
| |
| ImagePaintingOptions options = { |
| imageElement ? imageElement->compositeOperator() : CompositeOperator::SourceOver, |
| decodingModeForImageDraw(*image, paintInfo), |
| imageOrientation(), |
| image ? chooseInterpolationQuality(paintInfo.context(), *image, image, LayoutSize(rect.size())) : InterpolationQuality::Default |
| }; |
| |
| auto drawResult = paintInfo.context().drawImage(*img, rect, options); |
| if (drawResult == ImageDrawResult::DidRequestDecoding) |
| imageResource().cachedImage()->addClientWaitingForAsyncDecoding(*this); |
| |
| #if USE(SYSTEM_PREVIEW) |
| if (imageElement && imageElement->isSystemPreviewImage() && drawResult == ImageDrawResult::DidDraw && imageElement->document().settings().systemPreviewEnabled()) |
| theme().paintSystemPreviewBadge(*img, paintInfo, rect); |
| #endif |
| |
| return drawResult; |
| } |
| |
| bool RenderImage::boxShadowShouldBeAppliedToBackground(const LayoutPoint& paintOffset, BackgroundBleedAvoidance bleedAvoidance, const InlineIterator::InlineBoxIterator&) const |
| { |
| if (!RenderBoxModelObject::boxShadowShouldBeAppliedToBackground(paintOffset, bleedAvoidance, { })) |
| return false; |
| |
| return !const_cast<RenderImage*>(this)->backgroundIsKnownToBeObscured(paintOffset); |
| } |
| |
| bool RenderImage::foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const |
| { |
| UNUSED_PARAM(maxDepthToTest); |
| if (!imageResource().cachedImage() || imageResource().errorOccurred()) |
| return false; |
| if (cachedImage() && !cachedImage()->isLoaded()) |
| return false; |
| if (!contentBoxRect().contains(localRect)) |
| return false; |
| FillBox backgroundClip = style().backgroundClip(); |
| // Background paints under borders. |
| if (backgroundClip == FillBox::Border && style().hasBorder() && !borderObscuresBackground()) |
| return false; |
| // Background shows in padding area. |
| if ((backgroundClip == FillBox::Border || backgroundClip == FillBox::Padding) && style().hasPadding()) |
| return false; |
| // Object-fit may leave parts of the content box empty. |
| ObjectFit objectFit = style().objectFit(); |
| if (objectFit != ObjectFit::Fill && objectFit != ObjectFit::Cover) |
| return false; |
| |
| LengthPoint objectPosition = style().objectPosition(); |
| if (objectPosition != RenderStyle::initialObjectPosition()) |
| return false; |
| |
| // Check for image with alpha. |
| return cachedImage() && cachedImage()->currentFrameKnownToBeOpaque(this); |
| } |
| |
| bool RenderImage::computeBackgroundIsKnownToBeObscured(const LayoutPoint& paintOffset) |
| { |
| if (!hasBackground()) |
| return false; |
| |
| LayoutRect paintedExtent; |
| if (!getBackgroundPaintedExtent(paintOffset, paintedExtent)) |
| return false; |
| return foregroundIsKnownToBeOpaqueInRect(paintedExtent, 0); |
| } |
| |
| LayoutUnit RenderImage::minimumReplacedHeight() const |
| { |
| return imageResource().errorOccurred() ? intrinsicSize().height() : 0_lu; |
| } |
| |
| HTMLMapElement* RenderImage::imageMap() const |
| { |
| auto* imageElement = element(); |
| if (!imageElement || !is<HTMLImageElement>(imageElement)) |
| return nullptr; |
| return downcast<HTMLImageElement>(imageElement)->associatedMapElement(); |
| } |
| |
| bool RenderImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) |
| { |
| HitTestResult tempResult(result.hitTestLocation()); |
| bool inside = RenderReplaced::nodeAtPoint(request, tempResult, locationInContainer, accumulatedOffset, hitTestAction); |
| |
| if (tempResult.innerNode() && element()) { |
| if (HTMLMapElement* map = imageMap()) { |
| LayoutRect contentBox = contentBoxRect(); |
| float scaleFactor = 1 / style().effectiveZoom(); |
| LayoutPoint mapLocation = locationInContainer.point() - toLayoutSize(accumulatedOffset) - locationOffset() - toLayoutSize(contentBox.location()); |
| mapLocation.scale(scaleFactor); |
| |
| if (map->mapMouseEvent(mapLocation, contentBox.size(), tempResult)) |
| tempResult.setInnerNonSharedNode(element()); |
| } |
| } |
| |
| if (!inside && request.resultIsElementList()) |
| result.append(tempResult, request); |
| if (inside) |
| result = tempResult; |
| return inside; |
| } |
| |
| void RenderImage::updateAltText() |
| { |
| if (!element()) |
| return; |
| |
| if (is<HTMLInputElement>(*element())) |
| m_altText = downcast<HTMLInputElement>(*element()).altText(); |
| else if (is<HTMLImageElement>(*element())) |
| m_altText = downcast<HTMLImageElement>(*element()).altText(); |
| } |
| |
| bool RenderImage::canHaveChildren() const |
| { |
| return hasShadowContent(); |
| } |
| |
| void RenderImage::layout() |
| { |
| // Recomputing overflow is required only when child content is present. |
| if (needsSimplifiedNormalFlowLayoutOnly() && !hasShadowContent()) { |
| clearNeedsLayout(); |
| return; |
| } |
| |
| StackStats::LayoutCheckPoint layoutCheckPoint; |
| |
| LayoutSize oldSize = contentBoxRect().size(); |
| RenderReplaced::layout(); |
| |
| updateInnerContentRect(); |
| |
| if (hasShadowContent()) |
| layoutShadowContent(oldSize); |
| } |
| |
| void RenderImage::layoutShadowContent(const LayoutSize& oldSize) |
| { |
| for (auto& renderBox : childrenOfType<RenderBox>(*this)) { |
| bool childNeedsLayout = renderBox.needsLayout(); |
| // If the region chain has changed we also need to relayout the children to update the region box info. |
| // FIXME: We can do better once we compute region box info for RenderReplaced, not only for RenderBlock. |
| auto* fragmentedFlow = enclosingFragmentedFlow(); |
| if (fragmentedFlow && !childNeedsLayout) { |
| if (fragmentedFlow->pageLogicalSizeChanged()) |
| childNeedsLayout = true; |
| } |
| |
| auto newSize = contentBoxRect().size(); |
| if (newSize == oldSize && !childNeedsLayout) |
| continue; |
| |
| // When calling layout() on a child node, a parent must either push a LayoutStateMaintainer, or |
| // instantiate LayoutStateDisabler. Since using a LayoutStateMaintainer is slightly more efficient, |
| // and this method might be called many times per second during video playback, use a LayoutStateMaintainer: |
| LayoutStateMaintainer statePusher(*this, locationOffset(), hasTransform() || hasReflection() || style().isFlippedBlocksWritingMode()); |
| renderBox.setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop())); |
| renderBox.mutableStyle().setHeight(Length(newSize.height(), LengthType::Fixed)); |
| renderBox.mutableStyle().setWidth(Length(newSize.width(), LengthType::Fixed)); |
| renderBox.setNeedsLayout(MarkOnlyThis); |
| renderBox.layout(); |
| } |
| |
| clearChildNeedsLayout(); |
| } |
| |
| void RenderImage::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const |
| { |
| ASSERT(!shouldApplySizeContainment(*this)); |
| RenderReplaced::computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); |
| |
| // Our intrinsicSize is empty if we're rendering generated images with relative width/height. Figure out the right intrinsic size to use. |
| if (intrinsicSize.isEmpty() && (imageResource().imageHasRelativeWidth() || imageResource().imageHasRelativeHeight())) { |
| RenderObject* containingBlock = isOutOfFlowPositioned() ? container() : this->containingBlock(); |
| if (is<RenderBox>(*containingBlock)) { |
| auto& box = downcast<RenderBox>(*containingBlock); |
| intrinsicSize.setWidth(box.availableLogicalWidth()); |
| intrinsicSize.setHeight(box.availableLogicalHeight(IncludeMarginBorderPadding)); |
| } |
| } |
| |
| // Don't compute an intrinsic ratio to preserve historical WebKit behavior if we're painting alt text and/or a broken image. |
| if (shouldDisplayBrokenImageIcon()) { |
| if (settings().aspectRatioOfImgFromWidthAndHeightEnabled() |
| && style().aspectRatioType() == AspectRatioType::AutoAndRatio && !isShowingAltText()) |
| intrinsicRatio = style().logicalAspectRatio(); |
| else |
| intrinsicRatio = 1; |
| return; |
| } |
| } |
| |
| bool RenderImage::needsPreferredWidthsRecalculation() const |
| { |
| if (RenderReplaced::needsPreferredWidthsRecalculation()) |
| return true; |
| return embeddedContentBox(); |
| } |
| |
| RenderBox* RenderImage::embeddedContentBox() const |
| { |
| CachedImage* cachedImage = this->cachedImage(); |
| if (cachedImage && is<SVGImage>(cachedImage->image())) |
| return downcast<SVGImage>(*cachedImage->image()).embeddedContentBox(); |
| |
| return nullptr; |
| } |
| |
| } // namespace WebCore |
