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/*
* 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, 2004, 2005, 2006, 2008, 2009, 2010, 2011 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 "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 "InlineElementBox.h"
#include "Page.h"
#include "PaintInfo.h"
#include "RenderFragmentedFlow.h"
#include "RenderImageResourceStyleImage.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "SVGImage.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/StackStats.h>
#if PLATFORM(IOS)
#include "LogicalSelectionOffsetCaches.h"
#include "SelectionRect.h"
#endif
#if USE(CG)
#include "PDFDocumentImage.h"
#include "Settings.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderImage);
#if PLATFORM(IOS)
// 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::collectSelectionRects(Vector<SelectionRect>& rects, unsigned, unsigned)
{
RenderBlock* containingBlock = this->containingBlock();
IntRect imageRect;
// FIXME: It doesn't make sense to package line bounds into SelectionRects. 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;
InlineBox* inlineBox = inlineBoxWrapper();
if (!inlineBox) {
// 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 {
LayoutUnit selectionTop = !containingBlock->style().isFlippedBlocksWritingMode() ? inlineBox->root().selectionTop() - logicalTop() : logicalBottom() - inlineBox->root().selectionBottom();
imageRect = IntRect(0, selectionTop, logicalWidth(), inlineBox->root().selectionHeight());
isFirstOnLine = !inlineBox->previousOnLineExists();
isLastOnLine = !inlineBox->nextOnLineExists();
LogicalSelectionOffsetCaches cache(*containingBlock);
LayoutUnit leftOffset = containingBlock->logicalLeftSelectionOffset(*containingBlock, inlineBox->logicalTop(), cache);
LayoutUnit rightOffset = containingBlock->logicalRightSelectionOffset(*containingBlock, inlineBox->logicalTop(), cache);
lineExtentRect = IntRect(leftOffset - logicalLeft(), imageRect.y(), rightOffset - leftOffset, imageRect.height());
if (!inlineBox->isHorizontal()) {
imageRect = imageRect.transposedRect();
lineExtentRect = lineExtentRect.transposedRect();
}
}
bool isFixed = false;
IntRect absoluteBounds = localToAbsoluteQuad(FloatRect(imageRect), UseTransforms, &isFixed).enclosingBoundingBox();
IntRect lineExtentBounds = localToAbsoluteQuad(FloatRect(lineExtentRect)).enclosingBoundingBox();
if (!containingBlock->isHorizontalWritingMode())
lineExtentBounds = lineExtentBounds.transposedRect();
// FIXME: We should consider either making SelectionRect a struct or better organize its optional fields into
// an auxiliary struct to simplify its initialization.
rects.append(SelectionRect(absoluteBounds, 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(absoluteBounds.x())));
}
#endif
using namespace HTMLNames;
RenderImage::RenderImage(Element& element, RenderStyle&& style, StyleImage* styleImage, const float imageDevicePixelRatio)
: RenderReplaced(element, WTFMove(style), IntSize())
, m_imageResource(styleImage ? std::make_unique<RenderImageResourceStyleImage>(*styleImage) : std::make_unique<RenderImageResource>())
, m_imageDevicePixelRatio(imageDevicePixelRatio)
{
updateAltText();
if (is<HTMLImageElement>(element))
m_hasShadowControls = downcast<HTMLImageElement>(element).hasShadowControls();
}
RenderImage::RenderImage(Document& document, RenderStyle&& style, StyleImage* styleImage)
: RenderReplaced(document, WTFMove(style), IntSize())
, m_imageResource(styleImage ? std::make_unique<RenderImageResourceStyleImage>(*styleImage) : std::make_unique<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 ENABLE(CSS_IMAGE_ORIENTATION)
if (diff == StyleDifferenceLayout && oldStyle->imageOrientation() != style().imageOrientation())
return repaintOrMarkForLayout(ImageSizeChangeNone);
#endif
#if ENABLE(CSS_IMAGE_RESOLUTION)
if (diff == StyleDifferenceLayout
&& (oldStyle->imageResolution() != style().imageResolution()
|| oldStyle->imageResolutionSnap() != style().imageResolutionSnap()
|| oldStyle->imageResolutionSource() != style().imageResolutionSource()))
repaintOrMarkForLayout(ImageSizeChangeNone);
#endif
}
void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
{
if (renderTreeBeingDestroyed())
return;
if (hasVisibleBoxDecorations() || hasMask() || hasShapeOutside())
RenderReplaced::imageChanged(newImage, rect);
if (newImage != imageResource().imagePtr() || !newImage)
return;
if (!m_didIncrementVisuallyNonEmptyPixelCount) {
// At a zoom level of 1 the image is guaranteed to have an integer size.
view().frameView().incrementVisuallyNonEmptyPixelCount(flooredIntSize(imageResource().imageSize(1.0f)));
m_didIncrementVisuallyNonEmptyPixelCount = true;
}
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()->invalidateStyleAndLayerComposition();
}
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(intrinsicSize()).size());
if (!containerSize.isEmpty()) {
URL imageSourceURL;
if (HTMLImageElement* imageElement = is<HTMLImageElement>(element()) ? downcast<HTMLImageElement>(element()) : nullptr)
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() == ImageResolutionSnapPixels)
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)
{
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);
}
}
bool RenderImage::isShowingMissingOrImageError() const
{
return !imageResource().cachedImage() || imageResource().errorOccurred();
}
bool RenderImage::isShowingAltText() const
{
return isShowingMissingOrImageError() && !m_altText.isEmpty();
}
bool RenderImage::hasNonBitmapImage() const
{
if (!imageResource().cachedImage())
return false;
Image* image = cachedImage()->imageForRenderer(this);
return image && !is<BitmapImage>(image);
}
void RenderImage::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
LayoutSize contentSize = this->contentSize();
GraphicsContext& context = paintInfo.context();
float deviceScaleFactor = document().deviceScaleFactor();
if (!imageResource().cachedImage() || imageResource().errorOccurred()) {
if (paintInfo.phase == PaintPhaseSelection)
return;
if (paintInfo.phase == PaintPhaseForeground)
page().addRelevantUnpaintedObject(this, visualOverflowRect());
if (contentSize.width() > 2 && contentSize.height() > 2) {
LayoutUnit borderWidth = LayoutUnit(1 / deviceScaleFactor);
LayoutUnit leftBorder = borderLeft();
LayoutUnit topBorder = borderTop();
LayoutUnit leftPad = paddingLeft();
LayoutUnit topPad = paddingTop();
// Draw an outline rect where the image should be.
context.setStrokeStyle(SolidStroke);
context.setStrokeColor(Color::lightGray);
context.setFillColor(Color::transparent);
context.drawRect(snapRectToDevicePixels(LayoutRect({ paintOffset.x() + leftBorder + leftPad, paintOffset.y() + topBorder + topPad }, contentSize), deviceScaleFactor), borderWidth);
bool errorPictureDrawn = false;
LayoutSize imageOffset;
// When calculating the usable dimensions, exclude the pixels of
// the ouline rect so the error image/alt text doesn't draw on it.
LayoutSize usableSize = contentSize - LayoutSize(2 * borderWidth, 2 * borderWidth);
RefPtr<Image> image = imageResource().image();
if (imageResource().errorOccurred() && !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(document().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 + borderWidth, topBorder + topPad + centerY + borderWidth);
ImageOrientationDescription orientationDescription(shouldRespectImageOrientation());
#if ENABLE(CSS_IMAGE_ORIENTATION)
orientationDescription.setImageOrientationEnum(style().imageOrientation());
#endif
context.drawImage(*image, snapRectToDevicePixels(LayoutRect(paintOffset + imageOffset, imageSize), deviceScaleFactor), orientationDescription);
errorPictureDrawn = true;
}
if (!m_altText.isEmpty()) {
String text = document().displayStringModifiedByEncoding(m_altText);
context.setFillColor(style().visitedDependentColor(CSSPropertyColor));
const FontCascade& font = style().fontCascade();
const FontMetrics& fontMetrics = font.fontMetrics();
LayoutUnit ascent = fontMetrics.ascent();
LayoutPoint altTextOffset = paintOffset;
altTextOffset.move(leftBorder + leftPad + (paddingWidth / 2) - borderWidth, topBorder + topPad + ascent + (paddingHeight / 2) - borderWidth);
// 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.drawText(font, textRun, altTextOffset);
} else if (usableSize.width() >= textWidth && usableSize.height() >= fontMetrics.height())
context.drawText(font, textRun, altTextOffset);
}
}
return;
}
if (contentSize.isEmpty())
return;
RefPtr<Image> img = imageResource().image(flooredIntSize(contentSize));
if (!img || img->isNull()) {
if (paintInfo.phase == PaintPhaseForeground)
page().addRelevantUnpaintedObject(this, visualOverflowRect());
return;
}
LayoutRect contentBoxRect = this->contentBoxRect();
contentBoxRect.moveBy(paintOffset);
LayoutRect replacedContentRect = this->replacedContentRect(intrinsicSize());
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 (cachedImage() && paintInfo.phase == PaintPhaseForeground) {
// 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 == PaintPhaseOutline)
paintAreaElementFocusRing(paintInfo, paintOffset);
}
void RenderImage::paintAreaElementFocusRing(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
#if PLATFORM(IOS)
UNUSED_PARAM(paintInfo);
UNUSED_PARAM(paintOffset);
#else
if (document().printing() || !frame().selection().isFocusedAndActive())
return;
if (paintInfo.context().paintingDisabled() && !paintInfo.context().updatingControlTints())
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);
if (needsRepaint)
page().focusController().setFocusedElementNeedsRepaint();
#else
paintInfo.context().drawFocusRing(path, outlineWidth, areaElementStyle->outlineOffset(), areaElementStyle->visitedDependentColor(CSSPropertyOutlineColor));
#endif
#endif
}
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;
HTMLImageElement* imageElement = is<HTMLImageElement>(element()) ? downcast<HTMLImageElement>(element()) : nullptr;
CompositeOperator compositeOperator = imageElement ? imageElement->compositeOperator() : CompositeSourceOver;
// FIXME: Document when image != img.get().
Image* image = imageResource().image().get();
InterpolationQuality interpolation = image ? chooseInterpolationQuality(paintInfo.context(), *image, image, LayoutSize(rect.size())) : InterpolationDefault;
#if USE(CG)
if (is<PDFDocumentImage>(image))
downcast<PDFDocumentImage>(*image).setPdfImageCachingPolicy(settings().pdfImageCachingPolicy());
#endif
if (is<BitmapImage>(image))
downcast<BitmapImage>(*image).updateFromSettings(settings());
ImageOrientationDescription orientationDescription(shouldRespectImageOrientation(), style().imageOrientation());
auto decodingMode = decodingModeForImageDraw(*image, paintInfo);
auto drawResult = paintInfo.context().drawImage(*img, rect, ImagePaintingOptions(compositeOperator, BlendModeNormal, decodingMode, orientationDescription, interpolation));
if (drawResult == ImageDrawResult::DidRequestDecoding)
imageResource().cachedImage()->addPendingImageDrawingClient(*this);
#if USE(SYSTEM_PREVIEW)
if (imageElement && imageElement->isSystemPreviewImage())
theme().paintSystemPreviewBadge(*img, paintInfo, rect);
#endif
return drawResult;
}
bool RenderImage::boxShadowShouldBeAppliedToBackground(const LayoutPoint& paintOffset, BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox*) 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;
EFillBox backgroundClip = style().backgroundClip();
// Background paints under borders.
if (backgroundClip == BorderFillBox && style().hasBorder() && !borderObscuresBackground())
return false;
// Background shows in padding area.
if ((backgroundClip == BorderFillBox || backgroundClip == PaddingFillBox) && style().hasPadding())
return false;
// Object-fit may leave parts of the content box empty.
ObjectFit objectFit = style().objectFit();
if (objectFit != ObjectFitFill && objectFit != ObjectFitCover)
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() : LayoutUnit();
}
HTMLMapElement* RenderImage::imageMap() const
{
HTMLImageElement* image = is<HTMLImageElement>(element()) ? downcast<HTMLImageElement>(element()) : nullptr;
return image ? image->treeScope().getImageMap(image->attributeWithoutSynchronization(usemapAttr)) : nullptr;
}
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
{
#if !ENABLE(SERVICE_CONTROLS)
return false;
#else
return m_hasShadowControls;
#endif
}
void RenderImage::layout()
{
// Recomputing overflow is required only when child content is present.
if (needsSimplifiedNormalFlowLayout() && !m_hasShadowControls) {
clearNeedsLayout();
return;
}
StackStats::LayoutCheckPoint layoutCheckPoint;
LayoutSize oldSize = contentBoxRect().size();
RenderReplaced::layout();
updateInnerContentRect();
if (m_hasShadowControls)
layoutShadowControls(oldSize);
}
void RenderImage::layoutShadowControls(const LayoutSize& oldSize)
{
// We expect a single containing box under the UA shadow root.
ASSERT(firstChild() == lastChild());
auto* controlsRenderer = downcast<RenderBox>(firstChild());
if (!controlsRenderer)
return;
bool controlsNeedLayout = controlsRenderer->needsLayout();
// If the region chain has changed we also need to relayout the controls to update the region box info.
// FIXME: We can do better once we compute region box info for RenderReplaced, not only for RenderBlock.
const RenderFragmentedFlow* fragmentedFlow = enclosingFragmentedFlow();
if (fragmentedFlow && !controlsNeedLayout) {
if (fragmentedFlow->pageLogicalSizeChanged())
controlsNeedLayout = true;
}
LayoutSize newSize = contentBoxRect().size();
if (newSize == oldSize && !controlsNeedLayout)
return;
// When calling layout() on a child node, a parent must either push a LayoutStateMaintainter, 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());
if (shadowControlsNeedCustomLayoutMetrics()) {
controlsRenderer->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
controlsRenderer->mutableStyle().setHeight(Length(newSize.height(), Fixed));
controlsRenderer->mutableStyle().setWidth(Length(newSize.width(), Fixed));
}
controlsRenderer->setNeedsLayout(MarkOnlyThis);
controlsRenderer->layout();
clearChildNeedsLayout();
}
void RenderImage::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const
{
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 (imageResource().errorOccurred()) {
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