| /* |
| * Copyright (C) 2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ImageOverlay.h" |
| |
| #include "DOMTokenList.h" |
| #include "Document.h" |
| #include "ElementChildIterator.h" |
| #include "EventHandler.h" |
| #include "EventLoop.h" |
| #include "FloatSize.h" |
| #include "GeometryUtilities.h" |
| #include "HTMLBRElement.h" |
| #include "HTMLDivElement.h" |
| #include "HTMLMediaElement.h" |
| #include "HTMLStyleElement.h" |
| #include "ImageOverlayController.h" |
| #include "MediaControlsHost.h" |
| #include "Page.h" |
| #include "Quirks.h" |
| #include "RenderImage.h" |
| #include "RenderText.h" |
| #include "ShadowRoot.h" |
| #include "SimpleRange.h" |
| #include "Text.h" |
| #include "TextRecognitionResult.h" |
| #include "UserAgentStyleSheets.h" |
| #include <wtf/Range.h> |
| #include <wtf/WeakPtr.h> |
| #include <wtf/text/AtomString.h> |
| |
| #if ENABLE(DATA_DETECTION) |
| #include "DataDetection.h" |
| #endif |
| |
| namespace WebCore { |
| namespace ImageOverlay { |
| |
| static const AtomString& imageOverlayElementIdentifier() |
| { |
| static MainThreadNeverDestroyed<const AtomString> identifier("image-overlay", AtomString::ConstructFromLiteral); |
| return identifier; |
| } |
| |
| static const AtomString& imageOverlayDataDetectorClass() |
| { |
| static MainThreadNeverDestroyed<const AtomString> className("image-overlay-data-detector-result", AtomString::ConstructFromLiteral); |
| return className; |
| } |
| |
| #if ENABLE(IMAGE_ANALYSIS) |
| |
| static const AtomString& imageOverlayLineClass() |
| { |
| static MainThreadNeverDestroyed<const AtomString> className("image-overlay-line", AtomString::ConstructFromLiteral); |
| return className; |
| } |
| |
| static const AtomString& imageOverlayTextClass() |
| { |
| static MainThreadNeverDestroyed<const AtomString> className("image-overlay-text", AtomString::ConstructFromLiteral); |
| return className; |
| } |
| |
| static const AtomString& imageOverlayBlockClass() |
| { |
| static MainThreadNeverDestroyed<const AtomString> className("image-overlay-block", AtomString::ConstructFromLiteral); |
| return className; |
| } |
| |
| #endif // ENABLE(IMAGE_ANALYSIS) |
| |
| bool hasOverlay(const HTMLElement& element) |
| { |
| auto shadowRoot = element.shadowRoot(); |
| if (LIKELY(!shadowRoot || shadowRoot->mode() != ShadowRootMode::UserAgent)) |
| return false; |
| |
| return shadowRoot->hasElementWithId(*imageOverlayElementIdentifier().impl()); |
| } |
| |
| static RefPtr<HTMLElement> imageOverlayHost(const Node& node) |
| { |
| auto host = node.shadowHost(); |
| if (!is<HTMLElement>(host)) |
| return nullptr; |
| |
| RefPtr element { &downcast<HTMLElement>(*host) }; |
| return hasOverlay(*element) ? element : nullptr; |
| } |
| |
| bool isDataDetectorResult(const HTMLElement& element) |
| { |
| return imageOverlayHost(element) && element.hasClass() && element.classNames().contains(imageOverlayDataDetectorClass()); |
| } |
| |
| bool isInsideOverlay(const SimpleRange& range) |
| { |
| RefPtr commonAncestor = commonInclusiveAncestor<ComposedTree>(range); |
| if (!commonAncestor) |
| return false; |
| |
| return isInsideOverlay(*commonAncestor); |
| } |
| |
| bool isInsideOverlay(const Node& node) |
| { |
| auto host = imageOverlayHost(node); |
| if (!host) |
| return false; |
| |
| return host->userAgentShadowRoot()->contains(node); |
| } |
| |
| bool isOverlayText(const Node* node) |
| { |
| return node && isOverlayText(*node); |
| } |
| |
| bool isOverlayText(const Node& node) |
| { |
| auto host = imageOverlayHost(node); |
| if (!host) |
| return false; |
| |
| if (RefPtr overlay = static_cast<TreeScope&>(*host->userAgentShadowRoot()).getElementById(imageOverlayElementIdentifier())) |
| return node.isDescendantOf(*overlay); |
| |
| return false; |
| } |
| |
| void removeOverlaySoonIfNeeded(HTMLElement& element) |
| { |
| if (!hasOverlay(element)) |
| return; |
| |
| element.document().eventLoop().queueTask(TaskSource::InternalAsyncTask, [weakElement = WeakPtr { element }] { |
| RefPtr protectedElement = weakElement.get(); |
| if (!protectedElement) |
| return; |
| |
| RefPtr shadowRoot = protectedElement->userAgentShadowRoot(); |
| if (!shadowRoot) |
| return; |
| |
| if (RefPtr overlay = static_cast<TreeScope&>(*shadowRoot).getElementById(imageOverlayElementIdentifier())) |
| overlay->remove(); |
| |
| #if ENABLE(IMAGE_ANALYSIS) |
| if (auto page = protectedElement->document().page()) |
| page->resetTextRecognitionResult(*protectedElement); |
| #endif |
| }); |
| } |
| |
| #if ENABLE(IMAGE_ANALYSIS) |
| |
| IntRect containerRect(HTMLElement& element) |
| { |
| auto* renderer = element.renderer(); |
| if (!is<RenderImage>(renderer)) |
| return { }; |
| |
| if (!renderer->opacity()) |
| return { 0, 0, element.offsetWidth(), element.offsetHeight() }; |
| |
| return enclosingIntRect(downcast<RenderImage>(*renderer).replacedContentRect()); |
| } |
| |
| struct LineElements { |
| Ref<HTMLDivElement> line; |
| Vector<Ref<HTMLElement>> children; |
| RefPtr<HTMLBRElement> lineBreak; |
| }; |
| |
| struct Elements { |
| RefPtr<HTMLDivElement> root; |
| Vector<LineElements> lines; |
| Vector<Ref<HTMLDivElement>> dataDetectors; |
| Vector<Ref<HTMLDivElement>> blocks; |
| }; |
| |
| static Elements updateSubtree(HTMLElement& element, const TextRecognitionResult& result) |
| { |
| bool hadExistingElements = false; |
| Elements elements; |
| RefPtr<HTMLElement> mediaControlsContainer; |
| #if ENABLE(MODERN_MEDIA_CONTROLS) |
| mediaControlsContainer = ([&]() -> RefPtr<HTMLElement> { |
| RefPtr mediaElement = dynamicDowncast<HTMLMediaElement>(element); |
| if (!mediaElement) |
| return nullptr; |
| |
| Ref shadowRoot = mediaElement->ensureUserAgentShadowRoot(); |
| RefPtr controlsHost = mediaElement->mediaControlsHost(); |
| if (!controlsHost) { |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| } |
| |
| auto& containerClass = controlsHost->mediaControlsContainerClassName(); |
| for (auto& child : childrenOfType<HTMLDivElement>(shadowRoot.get())) { |
| if (child.hasClass() && child.classNames().contains(containerClass)) |
| return &child; |
| } |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| })(); |
| #endif // ENABLE(MODERN_MEDIA_CONTROLS) |
| |
| if (RefPtr shadowRoot = element.shadowRoot()) { |
| if (hasOverlay(element)) { |
| RefPtr<ContainerNode> containerForImageOverlay; |
| if (mediaControlsContainer) |
| containerForImageOverlay = mediaControlsContainer; |
| else |
| containerForImageOverlay = shadowRoot; |
| for (auto& child : childrenOfType<HTMLDivElement>(*containerForImageOverlay)) { |
| if (child.getIdAttribute() == imageOverlayElementIdentifier()) { |
| elements.root = &child; |
| hadExistingElements = true; |
| continue; |
| } |
| } |
| } |
| } |
| |
| if (elements.root) { |
| for (auto& childElement : childrenOfType<HTMLDivElement>(*elements.root)) { |
| if (!childElement.hasClass()) |
| continue; |
| |
| auto& classes = childElement.classList(); |
| if (classes.contains(imageOverlayDataDetectorClass())) { |
| elements.dataDetectors.append(childElement); |
| continue; |
| } |
| |
| if (classes.contains(imageOverlayBlockClass())) { |
| elements.blocks.append(childElement); |
| continue; |
| } |
| |
| ASSERT(classes.contains(imageOverlayLineClass())); |
| Vector<Ref<HTMLElement>> lineChildren; |
| for (auto& text : childrenOfType<HTMLDivElement>(childElement)) |
| lineChildren.append(text); |
| elements.lines.append({ childElement, WTFMove(lineChildren), childrenOfType<HTMLBRElement>(childElement).first() }); |
| } |
| |
| bool canUseExistingElements = ([&] { |
| if (result.dataDetectors.size() != elements.dataDetectors.size()) |
| return false; |
| |
| if (result.lines.size() != elements.lines.size()) |
| return false; |
| |
| if (result.blocks.size() != elements.blocks.size()) |
| return false; |
| |
| for (size_t lineIndex = 0; lineIndex < result.lines.size(); ++lineIndex) { |
| auto& lineResult = result.lines[lineIndex]; |
| auto& childResults = lineResult.children; |
| |
| auto& lineElements = elements.lines[lineIndex]; |
| auto& childTextElements = lineElements.children; |
| if (lineResult.hasTrailingNewline != static_cast<bool>(lineElements.lineBreak)) |
| return false; |
| |
| if (childResults.size() != childTextElements.size()) |
| return false; |
| |
| for (size_t childIndex = 0; childIndex < childResults.size(); ++childIndex) { |
| if (childResults[childIndex].text != childTextElements[childIndex]->textContent().stripWhiteSpace()) |
| return false; |
| } |
| } |
| |
| for (size_t index = 0; index < result.blocks.size(); ++index) { |
| if (result.blocks[index].text != elements.blocks[index]->textContent()) |
| return false; |
| } |
| |
| return true; |
| })(); |
| |
| if (!canUseExistingElements) { |
| elements.root->remove(); |
| elements = { }; |
| } |
| } |
| |
| if (result.isEmpty()) |
| return { }; |
| |
| Ref document = element.document(); |
| Ref shadowRoot = element.ensureUserAgentShadowRoot(); |
| if (!elements.root) { |
| auto rootContainer = HTMLDivElement::create(document.get()); |
| rootContainer->setIdAttribute(imageOverlayElementIdentifier()); |
| rootContainer->setTranslate(false); |
| if (document->isImageDocument()) |
| rootContainer->setInlineStyleProperty(CSSPropertyWebkitUserSelect, CSSValueText); |
| |
| if (mediaControlsContainer) |
| mediaControlsContainer->appendChild(rootContainer); |
| else |
| shadowRoot->appendChild(rootContainer); |
| elements.root = rootContainer.copyRef(); |
| elements.lines.reserveInitialCapacity(result.lines.size()); |
| for (auto& line : result.lines) { |
| auto lineContainer = HTMLDivElement::create(document.get()); |
| lineContainer->classList().add(imageOverlayLineClass()); |
| rootContainer->appendChild(lineContainer); |
| LineElements lineElements { lineContainer, { }, { } }; |
| lineElements.children.reserveInitialCapacity(line.children.size()); |
| for (size_t childIndex = 0; childIndex < line.children.size(); ++childIndex) { |
| auto& child = line.children[childIndex]; |
| auto textContainer = HTMLDivElement::create(document.get()); |
| textContainer->classList().add(imageOverlayTextClass()); |
| lineContainer->appendChild(textContainer); |
| textContainer->appendChild(Text::create(document.get(), child.hasLeadingWhitespace ? makeString('\n', child.text) : child.text)); |
| lineElements.children.uncheckedAppend(WTFMove(textContainer)); |
| } |
| |
| if (line.hasTrailingNewline) { |
| lineElements.lineBreak = HTMLBRElement::create(document.get()); |
| lineContainer->appendChild(*lineElements.lineBreak); |
| } |
| |
| elements.lines.uncheckedAppend(WTFMove(lineElements)); |
| } |
| |
| #if ENABLE(DATA_DETECTION) |
| elements.dataDetectors.reserveInitialCapacity(result.dataDetectors.size()); |
| for (auto& dataDetector : result.dataDetectors) { |
| auto dataDetectorContainer = DataDetection::createElementForImageOverlay(document.get(), dataDetector); |
| dataDetectorContainer->classList().add(imageOverlayDataDetectorClass()); |
| rootContainer->appendChild(dataDetectorContainer); |
| elements.dataDetectors.uncheckedAppend(WTFMove(dataDetectorContainer)); |
| } |
| #endif // ENABLE(DATA_DETECTION) |
| |
| elements.blocks.reserveInitialCapacity(result.blocks.size()); |
| for (auto& block : result.blocks) { |
| auto blockContainer = HTMLDivElement::create(document.get()); |
| blockContainer->classList().add(imageOverlayBlockClass()); |
| rootContainer->appendChild(blockContainer); |
| blockContainer->appendChild(Text::create(document.get(), makeString('\n', block.text))); |
| elements.blocks.uncheckedAppend(WTFMove(blockContainer)); |
| } |
| |
| if (document->quirks().needsToForceUserSelectAndUserDragWhenInstallingImageOverlay()) { |
| element.setInlineStyleProperty(CSSPropertyWebkitUserSelect, CSSValueText); |
| element.setInlineStyleProperty(CSSPropertyWebkitUserDrag, CSSValueAuto); |
| } |
| } |
| |
| if (!hadExistingElements) { |
| static MainThreadNeverDestroyed<const String> shadowStyle(StringImpl::createWithoutCopying(imageOverlayUserAgentStyleSheet, sizeof(imageOverlayUserAgentStyleSheet))); |
| auto style = HTMLStyleElement::create(HTMLNames::styleTag, document.get(), false); |
| style->setTextContent(shadowStyle); |
| shadowRoot->appendChild(WTFMove(style)); |
| } |
| |
| return elements; |
| } |
| |
| static RotatedRect fitElementToQuad(HTMLElement& container, const FloatQuad& quad) |
| { |
| auto bounds = rotatedBoundingRectWithMinimumAngleOfRotation(quad, 0.01); |
| container.setInlineStyleProperty(CSSPropertyWidth, bounds.size.width(), CSSUnitType::CSS_PX); |
| container.setInlineStyleProperty(CSSPropertyHeight, bounds.size.height(), CSSUnitType::CSS_PX); |
| container.setInlineStyleProperty(CSSPropertyTransform, makeString( |
| "translate("_s, |
| std::round(bounds.center.x() - (bounds.size.width() / 2)), "px, "_s, |
| std::round(bounds.center.y() - (bounds.size.height() / 2)), "px) "_s, |
| bounds.angleInRadians ? makeString("rotate("_s, bounds.angleInRadians, "rad) "_s) : emptyString() |
| )); |
| return bounds; |
| } |
| |
| void updateWithTextRecognitionResult(HTMLElement& element, const TextRecognitionResult& result, CacheTextRecognitionResults cacheTextRecognitionResults) |
| { |
| auto elements = updateSubtree(element, result); |
| if (!elements.root) |
| return; |
| |
| Ref document = element.document(); |
| document->updateLayoutIgnorePendingStylesheets(); |
| |
| auto* renderer = element.renderer(); |
| if (!is<RenderImage>(renderer)) |
| return; |
| |
| downcast<RenderImage>(*renderer).setHasImageOverlay(); |
| |
| auto containerRect = ImageOverlay::containerRect(element); |
| auto convertToContainerCoordinates = [&](const FloatQuad& normalizedQuad) { |
| auto quad = normalizedQuad; |
| quad.scale(containerRect.width(), containerRect.height()); |
| quad.move(containerRect.x(), containerRect.y()); |
| return quad; |
| }; |
| |
| bool applyUserSelectAll = document->isImageDocument() || renderer->style().userSelect() != UserSelect::None; |
| for (size_t lineIndex = 0; lineIndex < result.lines.size(); ++lineIndex) { |
| auto& lineElements = elements.lines[lineIndex]; |
| auto& lineContainer = lineElements.line; |
| auto& line = result.lines[lineIndex]; |
| auto lineQuad = convertToContainerCoordinates(line.normalizedQuad); |
| if (lineQuad.isEmpty()) |
| continue; |
| |
| auto lineBounds = fitElementToQuad(lineContainer.get(), lineQuad); |
| auto offsetAlongHorizontalAxis = [&](const FloatPoint& quadPoint1, const FloatPoint& quadPoint2) { |
| auto intervalLength = lineBounds.size.width(); |
| auto mid = midPoint(quadPoint1, quadPoint2); |
| mid.moveBy(-lineBounds.center); |
| mid.rotate(-lineBounds.angleInRadians); |
| return intervalLength * clampTo<float>(0.5 + mid.x() / intervalLength, 0, 1); |
| }; |
| |
| auto offsetsAlongHorizontalAxis = line.children.map([&](auto& child) -> WTF::Range<float> { |
| auto textQuad = convertToContainerCoordinates(child.normalizedQuad); |
| return { |
| offsetAlongHorizontalAxis(textQuad.p1(), textQuad.p4()), |
| offsetAlongHorizontalAxis(textQuad.p2(), textQuad.p3()) |
| }; |
| }); |
| |
| for (size_t childIndex = 0; childIndex < line.children.size(); ++childIndex) { |
| auto& textContainer = lineElements.children[childIndex]; |
| bool lineHasOneChild = line.children.size() == 1; |
| float horizontalMarginToMinimizeSelectionGaps = lineHasOneChild ? 0 : 0.125; |
| float horizontalOffset = lineHasOneChild ? 0 : -horizontalMarginToMinimizeSelectionGaps; |
| float horizontalExtent = lineHasOneChild ? 0 : horizontalMarginToMinimizeSelectionGaps; |
| |
| if (lineHasOneChild) { |
| horizontalOffset += offsetsAlongHorizontalAxis[childIndex].begin(); |
| horizontalExtent += offsetsAlongHorizontalAxis[childIndex].end(); |
| } else if (!childIndex) { |
| horizontalOffset += offsetsAlongHorizontalAxis[childIndex].begin(); |
| horizontalExtent += (offsetsAlongHorizontalAxis[childIndex].end() + offsetsAlongHorizontalAxis[childIndex + 1].begin()) / 2; |
| } else if (childIndex == line.children.size() - 1) { |
| horizontalOffset += (offsetsAlongHorizontalAxis[childIndex - 1].end() + offsetsAlongHorizontalAxis[childIndex].begin()) / 2; |
| horizontalExtent += offsetsAlongHorizontalAxis[childIndex].end(); |
| } else { |
| horizontalOffset += (offsetsAlongHorizontalAxis[childIndex - 1].end() + offsetsAlongHorizontalAxis[childIndex].begin()) / 2; |
| horizontalExtent += (offsetsAlongHorizontalAxis[childIndex].end() + offsetsAlongHorizontalAxis[childIndex + 1].begin()) / 2; |
| } |
| |
| FloatSize targetSize { horizontalExtent - horizontalOffset, lineBounds.size.height() }; |
| if (targetSize.isEmpty()) { |
| textContainer->setInlineStyleProperty(CSSPropertyTransform, "scale(0, 0)"); |
| continue; |
| } |
| |
| document->updateLayoutIfDimensionsOutOfDate(textContainer); |
| |
| FloatSize sizeBeforeTransform; |
| if (auto* renderer = textContainer->renderBoxModelObject()) { |
| sizeBeforeTransform = { |
| adjustLayoutUnitForAbsoluteZoom(renderer->offsetWidth(), *renderer).toFloat(), |
| adjustLayoutUnitForAbsoluteZoom(renderer->offsetHeight(), *renderer).toFloat(), |
| }; |
| } |
| |
| if (sizeBeforeTransform.isEmpty()) { |
| textContainer->setInlineStyleProperty(CSSPropertyTransform, "scale(0, 0)"); |
| continue; |
| } |
| |
| textContainer->setInlineStyleProperty(CSSPropertyTransform, makeString( |
| "translate("_s, |
| horizontalOffset + (targetSize.width() - sizeBeforeTransform.width()) / 2, "px, "_s, |
| (targetSize.height() - sizeBeforeTransform.height()) / 2, "px) "_s, |
| "scale("_s, targetSize.width() / sizeBeforeTransform.width(), ", "_s, targetSize.height() / sizeBeforeTransform.height(), ") "_s |
| )); |
| |
| textContainer->setInlineStyleProperty(CSSPropertyWebkitUserSelect, applyUserSelectAll ? CSSValueAll : CSSValueNone); |
| } |
| |
| if (document->isImageDocument()) |
| lineContainer->setInlineStyleProperty(CSSPropertyCursor, CSSValueText); |
| } |
| |
| #if ENABLE(DATA_DETECTION) |
| for (size_t index = 0; index < result.dataDetectors.size(); ++index) { |
| auto dataDetectorContainer = elements.dataDetectors[index]; |
| auto& dataDetector = result.dataDetectors[index]; |
| if (dataDetector.normalizedQuads.isEmpty()) |
| continue; |
| |
| auto firstQuad = dataDetector.normalizedQuads.first(); |
| if (firstQuad.isEmpty()) |
| continue; |
| |
| // FIXME: We should come up with a way to coalesce the bounding quads into one or more rotated rects with the same angle of rotation. |
| fitElementToQuad(dataDetectorContainer.get(), convertToContainerCoordinates(firstQuad)); |
| } |
| |
| if (!result.dataDetectors.isEmpty()) { |
| auto* page = document->page(); |
| if (auto* overlayController = page ? page->imageOverlayControllerIfExists() : nullptr) |
| overlayController->textRecognitionResultsChanged(element); |
| } |
| #endif // ENABLE(DATA_DETECTION) |
| |
| constexpr float minScaleForFontSize = 0; |
| constexpr float initialScaleForFontSize = 0.8; |
| constexpr float maxScaleForFontSize = 1; |
| constexpr unsigned iterationLimit = 10; |
| constexpr float minTargetScore = 0.9; |
| constexpr float maxTargetScore = 1.02; |
| |
| struct FontSizeAdjustmentState { |
| Ref<HTMLElement> container; |
| FloatSize targetSize; |
| float scale { initialScaleForFontSize }; |
| float minScale { minScaleForFontSize }; |
| float maxScale { maxScaleForFontSize }; |
| bool mayRequireAdjustment { true }; |
| }; |
| |
| Vector<FontSizeAdjustmentState> elementsToAdjust; |
| elementsToAdjust.reserveInitialCapacity(result.blocks.size()); |
| |
| ASSERT(result.blocks.size() == elements.blocks.size()); |
| for (size_t index = 0; index < result.blocks.size(); ++index) { |
| auto& block = result.blocks[index]; |
| if (block.normalizedQuad.isEmpty()) |
| continue; |
| |
| auto blockContainer = elements.blocks[index]; |
| auto bounds = fitElementToQuad(blockContainer.get(), convertToContainerCoordinates(block.normalizedQuad)); |
| blockContainer->setInlineStyleProperty(CSSPropertyFontSize, initialScaleForFontSize * bounds.size.height(), CSSUnitType::CSS_PX); |
| elementsToAdjust.uncheckedAppend({ WTFMove(blockContainer), bounds.size }); |
| } |
| |
| unsigned currentIteration = 0; |
| while (!elementsToAdjust.isEmpty()) { |
| document->updateLayoutIgnorePendingStylesheets(); |
| |
| for (auto& state : elementsToAdjust) { |
| RefPtr textNode = state.container->firstChild(); |
| if (!is<Text>(textNode)) { |
| ASSERT_NOT_REACHED(); |
| state.mayRequireAdjustment = false; |
| continue; |
| } |
| |
| auto* textRenderer = downcast<Text>(*textNode).renderer(); |
| if (!textRenderer) { |
| ASSERT_NOT_REACHED(); |
| state.mayRequireAdjustment = false; |
| continue; |
| } |
| |
| auto currentScore = (textRenderer->linesBoundingBox().size() / state.targetSize).maxDimension(); |
| if (currentScore < minTargetScore) |
| state.minScale = state.scale; |
| else if (currentScore > maxTargetScore) |
| state.maxScale = state.scale; |
| else { |
| state.mayRequireAdjustment = false; |
| continue; |
| } |
| |
| state.scale = (state.minScale + state.maxScale) / 2; |
| state.container->setInlineStyleProperty(CSSPropertyFontSize, state.targetSize.height() * state.scale, CSSUnitType::CSS_PX); |
| } |
| |
| elementsToAdjust.removeAllMatching([](auto& state) { |
| return !state.mayRequireAdjustment; |
| }); |
| |
| if (++currentIteration > iterationLimit) { |
| // Fall back to the largest font size that still vertically fits within the container. |
| for (auto& state : elementsToAdjust) |
| state.container->setInlineStyleProperty(CSSPropertyFontSize, state.targetSize.height() * state.minScale, CSSUnitType::CSS_PX); |
| break; |
| } |
| } |
| |
| if (RefPtr frame = document->frame()) |
| frame->eventHandler().scheduleCursorUpdate(); |
| |
| if (cacheTextRecognitionResults == CacheTextRecognitionResults::Yes) { |
| if (auto* page = document->page()) |
| page->cacheTextRecognitionResult(element, containerRect, result); |
| } |
| } |
| |
| #endif // ENABLE(IMAGE_ANALYSIS) |
| |
| } // namespace ImageOverlay |
| } // namespace WebCore |
