C++ LayoutPoint::scale方法代码示例

MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> abstractView,
                                     int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
                                     const IntPoint& movementDelta,
                                     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
    : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey)
    , m_screenLocation(screenLocation)
    , m_movementDelta(movementDelta)
    , m_isSimulated(isSimulated)
{
    LayoutPoint adjustedPageLocation;
    LayoutPoint scrollPosition;

    LocalFrame* frame = view() ? view()->frame() : 0;
    if (frame && !isSimulated) {
        if (FrameView* frameView = frame->view()) {
            scrollPosition = frameView->scrollPosition();
            adjustedPageLocation = frameView->windowToContents(windowLocation);
            float scaleFactor = 1 / frame->pageZoomFactor();
            if (scaleFactor != 1.0f) {
                adjustedPageLocation.scale(scaleFactor, scaleFactor);
                scrollPosition.scale(scaleFactor, scaleFactor);
            }
        }
    }

    m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition);
    m_pageLocation = adjustedPageLocation;

    initCoordinates();
}

Node* TreeScope::nodeFromPoint(const LayoutPoint& clientPoint, LayoutPoint* localPoint)
{
    auto* frame = documentScope().frame();
    auto* view = documentScope().view();
    if (!frame || !view)
        return nullptr;

    float scaleFactor = frame->pageZoomFactor() * frame->frameScaleFactor();

    LayoutPoint contentsPoint = clientPoint;
    contentsPoint.scale(scaleFactor);
    contentsPoint.moveBy(view->contentsScrollPosition());

    LayoutRect visibleRect;
#if PLATFORM(IOS)
    visibleRect = view->unobscuredContentRect();
#else
    visibleRect = view->visibleContentRect();
#endif
    if (!visibleRect.contains(contentsPoint))
        return nullptr;

    HitTestResult result(contentsPoint);
    documentScope().renderView()->hitTest(HitTestRequest(), result);

    if (localPoint)
        *localPoint = result.localPoint();

    return result.innerNode();
}

MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, PassRefPtr<AbstractView> abstractView,
                                     int detail, const LayoutPoint& screenLocation, const LayoutPoint& windowLocation,
                                     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
    : UIEventWithKeyState(eventType, canBubble, cancelable, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey)
    , m_screenLocation(screenLocation)
    , m_isSimulated(isSimulated)
{
    LayoutPoint adjustedPageLocation;
    LayoutPoint scrollPosition;

    Frame* frame = view() ? view()->frame() : 0;
    if (frame && !isSimulated) {
        if (FrameView* frameView = frame->view()) {
            scrollPosition = frameView->scrollPosition();
            adjustedPageLocation = frameView->windowToContents(windowLocation);
            float pageZoom = frame->pageZoomFactor();
            if (pageZoom != 1.0f) {
                // Adjust our pageX and pageY to account for the page zoom.
                adjustedPageLocation.scale(1 / pageZoom, 1 / pageZoom);

                // FIXME: Change this to use float math and proper rounding (or
                // better yet, use LayoutPoint::scale).
                scrollPosition.setX(scrollPosition.x() / pageZoom);
                scrollPosition.setY(scrollPosition.y() / pageZoom);
            }
        }
    }

    m_clientLocation = adjustedPageLocation - toSize(scrollPosition);
    m_pageLocation = adjustedPageLocation;

    initCoordinates();
}

HTMLAreaElement* HitTestResult::imageAreaForImage() const
{
    ASSERT(m_innerNode);
    HTMLImageElement* imageElement = nullptr;
    if (isHTMLImageElement(m_innerNode)) {
        imageElement = toHTMLImageElement(m_innerNode);
    } else if (m_innerNode->isInShadowTree()) {
        if (m_innerNode->containingShadowRoot()->type() == ShadowRootType::UserAgent) {
            if (isHTMLImageElement(m_innerNode->shadowHost()))
                imageElement = toHTMLImageElement(m_innerNode->shadowHost());
        }
    }

    if (!imageElement || !imageElement->layoutObject() || !imageElement->layoutObject()->isBox())
        return nullptr;

    HTMLMapElement* map = imageElement->treeScope().getImageMap(imageElement->fastGetAttribute(usemapAttr));
    if (!map)
        return nullptr;

    LayoutBox* box = toLayoutBox(imageElement->layoutObject());
    LayoutRect contentBox = box->contentBoxRect();
    float scaleFactor = 1 / box->style()->effectiveZoom();
    LayoutPoint location = localPoint();
    location.scale(scaleFactor, scaleFactor);

    return map->areaForPoint(location, contentBox.size());
}

MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, double timestamp, PassRefPtr<AbstractView> abstractView,
                                     int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
#if ENABLE(POINTER_LOCK)
                                     const IntPoint& movementDelta,
#endif
                                     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
    : UIEventWithKeyState(eventType, canBubble, cancelable, timestamp, abstractView, detail, ctrlKey, altKey, shiftKey, metaKey)
    , m_screenLocation(screenLocation)
#if ENABLE(POINTER_LOCK)
    , m_movementDelta(movementDelta)
#endif
    , m_isSimulated(isSimulated)
{
    LayoutPoint adjustedPageLocation;
    LayoutPoint scrollPosition;

    Frame* frame = view() ? view()->frame() : 0;
    if (frame && !isSimulated) {
        if (FrameView* frameView = frame->view()) {
#if !PLATFORM(IOS)
            scrollPosition = frameView->scrollPosition();
#else
            scrollPosition = frameView->actualScrollPosition();
#endif
            adjustedPageLocation = frameView->windowToContents(windowLocation);
            float scaleFactor = 1 / (frame->pageZoomFactor() * frame->frameScaleFactor());
            if (scaleFactor != 1.0f) {
                adjustedPageLocation.scale(scaleFactor, scaleFactor);
                scrollPosition.scale(scaleFactor, scaleFactor);
            }
        }
    }

    m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition);
    m_pageLocation = adjustedPageLocation;

    initCoordinates();
}

void MouseRelatedEvent::init(bool isSimulated, const IntPoint& windowLocation)
{
    LayoutPoint adjustedPageLocation;
    LayoutPoint scrollPosition;

    Frame* frame = view() ? view()->frame() : nullptr;
    if (frame && !isSimulated) {
        if (FrameView* frameView = frame->view()) {
            scrollPosition = frameView->contentsScrollPosition();
            adjustedPageLocation = frameView->windowToContents(windowLocation);
            float scaleFactor = 1 / (frame->pageZoomFactor() * frame->frameScaleFactor());
            if (scaleFactor != 1.0f) {
                adjustedPageLocation.scale(scaleFactor, scaleFactor);
                scrollPosition.scale(scaleFactor, scaleFactor);
            }
        }
    }

    m_clientLocation = adjustedPageLocation - toLayoutSize(scrollPosition);
    m_pageLocation = adjustedPageLocation;

    initCoordinates();
}

AffineTransform SVGSVGElement::localCoordinateSpaceTransform(SVGLocatable::CTMScope mode) const
{
    AffineTransform viewBoxTransform;
    if (!hasEmptyViewBox()) {
        FloatSize size = currentViewportSize();
        viewBoxTransform = viewBoxToViewTransform(size.width(), size.height());
    }

    AffineTransform transform;
    if (!isOutermostSVGSVGElement()) {
        SVGLengthContext lengthContext(this);
        transform.translate(x().value(lengthContext), y().value(lengthContext));
    } else if (mode == SVGLocatable::ScreenScope) {
        if (auto* renderer = this->renderer()) {
            FloatPoint location;
            float zoomFactor = 1;

            // At the SVG/HTML boundary (aka RenderSVGRoot), we apply the localToBorderBoxTransform 
            // to map an element from SVG viewport coordinates to CSS box coordinates.
            // RenderSVGRoot's localToAbsolute method expects CSS box coordinates.
            // We also need to adjust for the zoom level factored into CSS coordinates (bug #96361).
            if (is<RenderSVGRoot>(*renderer)) {
                location = downcast<RenderSVGRoot>(*renderer).localToBorderBoxTransform().mapPoint(location);
                zoomFactor = 1 / renderer->style().effectiveZoom();
            }

            // Translate in our CSS parent coordinate space
            // FIXME: This doesn't work correctly with CSS transforms.
            location = renderer->localToAbsolute(location, UseTransforms);
            location.scale(zoomFactor);

            // Be careful here! localToBorderBoxTransform() included the x/y offset coming from the viewBoxToViewTransform(),
            // so we have to subtract it here (original cause of bug #27183)
            transform.translate(location.x() - viewBoxTransform.e(), location.y() - viewBoxTransform.f());

            // Respect scroll offset.
            if (FrameView* view = document().view()) {
                LayoutPoint scrollPosition = view->scrollPosition();
                scrollPosition.scale(zoomFactor);
                transform.translate(-scrollPosition.x(), -scrollPosition.y());
            }
        }
    }

    return transform.multiply(viewBoxTransform);
}