Example #1
0
void Frame::scrollOverflowLayer(RenderLayer* layer, const IntRect& visibleRect, const IntRect& exposeRect)
{
    if (!layer)
        return;

    RenderBox* box = layer->renderBox();
    if (!box)
        return;

    if (visibleRect.intersects(exposeRect))
        return;

    // FIXME: Why isn't this just calling RenderLayer::scrollRectToVisible()?
    ScrollOffset scrollOffset = layer->scrollOffset();
    int exposeLeft = exposeRect.x();
    int exposeRight = exposeLeft + exposeRect.width();
    int clientWidth = roundToInt(box->clientWidth());
    if (exposeLeft <= 0)
        scrollOffset.setX(std::max(0, scrollOffset.x() + exposeLeft - clientWidth / 2));
    else if (exposeRight >= clientWidth)
        scrollOffset.setX(std::min(box->scrollWidth() - clientWidth, scrollOffset.x() + clientWidth / 2));

    int exposeTop = exposeRect.y();
    int exposeBottom = exposeTop + exposeRect.height();
    int clientHeight = roundToInt(box->clientHeight());
    if (exposeTop <= 0)
        scrollOffset.setY(std::max(0, scrollOffset.y() + exposeTop - clientHeight / 2));
    else if (exposeBottom >= clientHeight)
        scrollOffset.setY(std::min(box->scrollHeight() - clientHeight, scrollOffset.y() + clientHeight / 2));

    layer->scrollToOffset(scrollOffset);
    selection().setCaretRectNeedsUpdate();
    selection().updateAppearance();
}
Example #2
0
void Frame::scrollOverflowLayer(RenderLayer* layer, const IntRect& visibleRect, const IntRect& exposeRect)
{
    if (!layer)
        return;

    RenderBox* box = layer->renderBox();
    if (!box)
        return;

    if (visibleRect.intersects(exposeRect))
        return;

    int x = layer->scrollXOffset();
    int exposeLeft = exposeRect.x();
    int exposeRight = exposeLeft + exposeRect.width();
    int clientWidth = roundToInt(box->clientWidth());
    if (exposeLeft <= 0)
        x = std::max(0, x + exposeLeft - clientWidth / 2);
    else if (exposeRight >= clientWidth)
        x = std::min(box->scrollWidth() - clientWidth, x + clientWidth / 2);

    int y = layer->scrollYOffset();
    int exposeTop = exposeRect.y();
    int exposeBottom = exposeTop + exposeRect.height();
    int clientHeight = roundToInt(box->clientHeight());
    if (exposeTop <= 0)
        y = std::max(0, y + exposeTop - clientHeight / 2);
    else if (exposeBottom >= clientHeight)
        y = std::min(box->scrollHeight() - clientHeight, y + clientHeight / 2);

    layer->scrollToOffset(IntSize(x, y));
    selection().setCaretRectNeedsUpdate();
    selection().updateAppearance();
}
Example #3
0
InRegionScrollableArea::InRegionScrollableArea(WebPagePrivate* webPage, RenderLayer* layer)
    : m_webPage(webPage)
    , m_layer(layer)
{
    ASSERT(webPage);
    ASSERT(layer);
    m_isNull = false;

    // FIXME: Add an ASSERT here as the 'layer' must be scrollable.

    RenderObject* layerRenderer = layer->renderer();
    ASSERT(layerRenderer);

    if (layerRenderer->isRenderView()) { // #document case

        FrameView* view = toRenderView(layerRenderer)->frameView();
        ASSERT(view);

        Frame* frame = view->frame();
        ASSERT_UNUSED(frame, frame);

        m_scrollPosition = m_webPage->mapToTransformed(view->scrollPosition());
        m_contentsSize = m_webPage->mapToTransformed(view->contentsSize());
        m_viewportSize = m_webPage->mapToTransformed(view->visibleContentRect(false /*includeScrollbars*/)).size();

        m_visibleWindowRect = m_webPage->mapToTransformed(m_webPage->getRecursiveVisibleWindowRect(view));
        IntRect transformedWindowRect = IntRect(IntPoint::zero(), m_webPage->transformedViewportSize());
        m_visibleWindowRect.intersect(transformedWindowRect);

        m_scrollsHorizontally = view->contentsWidth() > view->visibleWidth();
        m_scrollsVertically = view->contentsHeight() > view->visibleHeight();

        m_overscrollLimitFactor = 0.0; // FIXME eventually support overscroll
    } else { // RenderBox-based elements case (scrollable boxes (div's, p's, textarea's, etc)).

        RenderBox* box = m_layer->renderBox();
        ASSERT(box);
        ASSERT(box->canBeScrolledAndHasScrollableArea());

        ScrollableArea* scrollableArea = static_cast<ScrollableArea*>(m_layer);
        m_scrollPosition = m_webPage->mapToTransformed(scrollableArea->scrollPosition());
        m_contentsSize = m_webPage->mapToTransformed(scrollableArea->contentsSize());
        m_viewportSize = m_webPage->mapToTransformed(scrollableArea->visibleContentRect(false /*includeScrollbars*/)).size();

        m_visibleWindowRect = m_layer->renderer()->absoluteClippedOverflowRect();
        m_visibleWindowRect = m_layer->renderer()->frame()->view()->contentsToWindow(m_visibleWindowRect);
        IntRect visibleFrameWindowRect = m_webPage->getRecursiveVisibleWindowRect(m_layer->renderer()->frame()->view());
        m_visibleWindowRect.intersect(visibleFrameWindowRect);
        m_visibleWindowRect = m_webPage->mapToTransformed(m_visibleWindowRect);
        IntRect transformedWindowRect = IntRect(IntPoint::zero(), m_webPage->transformedViewportSize());
        m_visibleWindowRect.intersect(transformedWindowRect);

        m_scrollsHorizontally = box->scrollWidth() != box->clientWidth() && box->scrollsOverflowX();
        m_scrollsVertically = box->scrollHeight() != box->clientHeight() && box->scrollsOverflowY();

        m_overscrollLimitFactor = 0.0; // FIXME eventually support overscroll
    }
}
Example #4
0
static bool isElementLargeEnoughForMainContent(const HTMLMediaElement& element)
{
    static const double elementMainContentAreaMinimum = 400 * 300;
    static const double maximumAspectRatio = 1.8; // Slightly larger than 16:9.
    static const double minimumAspectRatio = .5; // Slightly smaller than 16:9.

    // Elements which have not yet been laid out, or which are not yet in the DOM, cannot be main content.
    RenderBox* renderer = downcast<RenderBox>(element.renderer());
    if (!renderer)
        return false;

    double width = renderer->clientWidth();
    double height = renderer->clientHeight();
    double area = width * height;
    double aspectRatio = width / height;
    return area >= elementMainContentAreaMinimum && aspectRatio >= minimumAspectRatio && aspectRatio <= maximumAspectRatio;
}
Example #5
0
int RenderMarquee::computePosition(EMarqueeDirection dir, bool stopAtContentEdge)
{
    RenderBox* box = m_layer->renderBox();
    ASSERT(box);
    RenderStyle* s = box->style();
    if (isHorizontal()) {
        bool ltr = s->direction() == LTR;
        int clientWidth = box->clientWidth();
        int contentWidth = ltr ? box->rightmostPosition(true, false) : box->leftmostPosition(true, false);
        if (ltr)
            contentWidth += (box->paddingRight() - box->borderLeft());
        else {
            contentWidth = box->width() - contentWidth;
            contentWidth += (box->paddingLeft() - box->borderRight());
        }
        if (dir == MRIGHT) {
            if (stopAtContentEdge)
                return max(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? contentWidth : clientWidth;
        }
        else {
            if (stopAtContentEdge)
                return min(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? -clientWidth : -contentWidth;
        }
    }
    else {
        int contentHeight = box->lowestPosition(true, false) -
                            box->borderTop() + box->paddingBottom();
        int clientHeight = box->clientHeight();
        if (dir == MUP) {
            if (stopAtContentEdge)
                return min(contentHeight - clientHeight, 0);
            else
                return -clientHeight;
        }
        else {
            if (stopAtContentEdge)
                return max(contentHeight - clientHeight, 0);
            else
                return contentHeight;
        }
    }
}
int RenderMarquee::computePosition(EMarqueeDirection dir, bool stopAtContentEdge)
{
    RenderBox* box = m_layer->renderBox();
    ASSERT(box);
    RenderStyle* s = box->style();
    if (isHorizontal()) {
        bool ltr = s->isLeftToRightDirection();
        LayoutUnit clientWidth = box->clientWidth();
        LayoutUnit contentWidth = ltr ? box->maxPreferredLogicalWidth() : box->minPreferredLogicalWidth();
        if (ltr)
            contentWidth += (box->paddingRight() - box->borderLeft());
        else {
            contentWidth = box->width() - contentWidth;
            contentWidth += (box->paddingLeft() - box->borderRight());
        }
        if (dir == MRIGHT) {
            if (stopAtContentEdge)
                return max<LayoutUnit>(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? contentWidth : clientWidth;
        }
        else {
            if (stopAtContentEdge)
                return min<LayoutUnit>(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? -clientWidth : -contentWidth;
        }
    }
    else {
        int contentHeight = box->layoutOverflowRect().maxY() - box->borderTop() + box->paddingBottom();
        int clientHeight = box->clientHeight();
        if (dir == MUP) {
            if (stopAtContentEdge)
                 return min(contentHeight - clientHeight, 0);
            else
                return -clientHeight;
        }
        else {
            if (stopAtContentEdge)
                return max(contentHeight - clientHeight, 0);
            else 
                return contentHeight;
        }
    }    
}
InRegionScrollableArea::InRegionScrollableArea(WebPagePrivate* webPage, RenderLayer* layer)
    : m_webPage(webPage)
    , m_layer(layer)
    , m_document(0)
    , m_hasWindowVisibleRectCalculated(false)
{
    ASSERT(webPage);
    ASSERT(layer);
    m_isNull = false;

    // Add a pointer to the enclosing document as the pointer to layer or node along the way may become invalid.
    if (m_layer->enclosingElement())
        m_document = m_layer->enclosingElement()->document();

    // FIXME: Add an ASSERT here as the 'layer' must be scrollable.

    RenderObject* layerRenderer = layer->renderer();
    ASSERT(layerRenderer);

    if (layerRenderer->isRenderView()) { // #document case

        RenderView* renderView = toRenderView(layerRenderer);
        ASSERT(renderView);

        FrameView* view = toRenderView(layerRenderer)->frameView();
        ASSERT(view);

        Frame* frame = view->frame();
        ASSERT_UNUSED(frame, frame);

        const Platform::ViewportAccessor* viewportAccessor = m_webPage->m_webkitThreadViewportAccessor;
        m_scrollPosition = viewportAccessor->roundToPixelFromDocumentContents(WebCore::FloatPoint(view->scrollPosition()));
        m_contentsSize = viewportAccessor->roundToPixelFromDocumentContents(Platform::FloatRect(Platform::FloatPoint::zero(), WebCore::FloatSize(view->contentsSize()))).size();
        m_viewportSize = viewportAccessor->roundToPixelFromDocumentContents(WebCore::FloatRect(view->visibleContentRect(ScrollableArea::ExcludeScrollbars))).size();
        m_documentViewportRect = view->frameRect();

        m_scrollsHorizontally = view->contentsWidth() > view->visibleWidth();
        m_scrollsVertically = view->contentsHeight() > view->visibleHeight();

        m_supportsCompositedScrolling = true;

        m_scrollTarget = InnerFrame;

        ASSERT(!m_cachedNonCompositedScrollableNode);

        m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(renderView->compositor()->scrollLayer()->platformLayer());
        m_cachedCompositedScrollableLayer = renderView->compositor()->scrollLayer()->platformLayer();

    } else { // RenderBox-based elements case (scrollable boxes (div's, p's, textarea's, etc)).

        RenderBox* box = m_layer->renderBox();
        ASSERT(box);
        ASSERT(InRegionScrollerPrivate::canScrollRenderBox(box));

        const Platform::ViewportAccessor* viewportAccessor = m_webPage->m_webkitThreadViewportAccessor;
        ScrollableArea* scrollableArea = static_cast<ScrollableArea*>(m_layer);

        m_scrollPosition = viewportAccessor->roundToPixelFromDocumentContents(WebCore::FloatPoint(scrollableArea->scrollPosition()));
        m_contentsSize = viewportAccessor->roundToPixelFromDocumentContents(Platform::FloatRect(Platform::FloatPoint::zero(), WebCore::FloatSize(scrollableArea->contentsSize()))).size();
        m_viewportSize = viewportAccessor->roundToPixelFromDocumentContents(WebCore::FloatRect(scrollableArea->visibleContentRect(ScrollableArea::ExcludeScrollbars))).size();
        m_documentViewportRect = enclosingIntRect(box->absoluteClippedOverflowRect());

        m_scrollsHorizontally = box->scrollWidth() != box->clientWidth();
        m_scrollsVertically = box->scrollHeight() != box->clientHeight();

        // Check the overflow if its not an input field because overflow can be set to hidden etc. by the content.
        if (!DOMSupport::isShadowHostTextInputElement(box->node())) {
            m_scrollsHorizontally = m_scrollsHorizontally && box->scrollsOverflowX();
            m_scrollsVertically = m_scrollsVertically && box->scrollsOverflowY();
        }

        m_scrollTarget = BlockElement;

        // Both caches below are self-exclusive.
        if (m_layer->usesCompositedScrolling()) {
            m_forceContentToBeHorizontallyScrollable = m_scrollsHorizontally;
            m_forceContentToBeVerticallyScrollable = m_scrollsVertically;
            // Force content to be scrollable even if it doesn't need to scroll in either direction.
            if (!m_scrollsHorizontally && !m_scrollsVertically) {
                if (box->scrollsOverflowY())
                    m_forceContentToBeVerticallyScrollable = true;
                else if (box->scrollsOverflowX()) // If it's already forced scrollable vertically, don't force it to scroll horizontally
                    m_forceContentToBeHorizontallyScrollable = true;
            }
            m_supportsCompositedScrolling = true;
            ASSERT(m_layer->backing()->hasScrollingLayer());
            m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(m_layer->backing()->scrollingContentsLayer()->platformLayer());
            m_cachedCompositedScrollableLayer = m_layer->backing()->scrollingContentsLayer()->platformLayer();
            ASSERT(!m_cachedNonCompositedScrollableNode);
        } else {
            m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(m_layer->enclosingElement());
            m_cachedNonCompositedScrollableNode = m_layer->enclosingElement();
            ASSERT(!m_cachedCompositedScrollableLayer);
        }
    }
}
InRegionScrollableArea::InRegionScrollableArea(WebPagePrivate* webPage, RenderLayer* layer)
    : m_webPage(webPage)
    , m_layer(layer)
    , m_document(0)
    , m_hasWindowVisibleRectCalculated(false)
{
    ASSERT(webPage);
    ASSERT(layer);
    m_isNull = false;

    // Add a pointer to the enclosing document as the pointer to layer or node along the way may become invalid.
    if (m_layer->enclosingElement())
        m_document = m_layer->enclosingElement()->document();

    // FIXME: Add an ASSERT here as the 'layer' must be scrollable.

    RenderObject* layerRenderer = layer->renderer();
    ASSERT(layerRenderer);

    if (layerRenderer->isRenderView()) { // #document case

        RenderView* renderView = toRenderView(layerRenderer);
        ASSERT(renderView);

        FrameView* view = toRenderView(layerRenderer)->frameView();
        ASSERT(view);

        Frame* frame = view->frame();
        ASSERT_UNUSED(frame, frame);

        m_scrollPosition = m_webPage->mapToTransformed(view->scrollPosition());
        m_contentsSize = m_webPage->mapToTransformed(view->contentsSize());
        m_viewportSize = m_webPage->mapToTransformed(view->visibleContentRect(ScrollableArea::ExcludeScrollbars)).size();
        m_documentViewportRect = view->frameRect();

        m_scrollsHorizontally = view->contentsWidth() > view->visibleWidth();
        m_scrollsVertically = view->contentsHeight() > view->visibleHeight();

        m_supportsCompositedScrolling = true;

        m_scrollTarget = InnerFrame;

        ASSERT(!m_cachedNonCompositedScrollableNode);

        m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(renderView->compositor()->scrollLayer()->platformLayer());
        m_cachedCompositedScrollableLayer = renderView->compositor()->scrollLayer()->platformLayer();

    } else { // RenderBox-based elements case (scrollable boxes (div's, p's, textarea's, etc)).

        RenderBox* box = m_layer->renderBox();
        ASSERT(box);
        ASSERT(InRegionScrollerPrivate::canScrollRenderBox(box));

        ScrollableArea* scrollableArea = static_cast<ScrollableArea*>(m_layer);
        m_scrollPosition = m_webPage->mapToTransformed(scrollableArea->scrollPosition());
        m_contentsSize = m_webPage->mapToTransformed(scrollableArea->contentsSize());
        m_viewportSize = m_webPage->mapToTransformed(scrollableArea->visibleContentRect(ScrollableArea::ExcludeScrollbars)).size();
        m_documentViewportRect = enclosingIntRect(box->absoluteClippedOverflowRect());

        m_scrollsHorizontally = box->scrollWidth() != box->clientWidth();
        m_scrollsVertically = box->scrollHeight() != box->clientHeight();

        // Check the overflow if its not an input field because overflow can be set to hidden etc. by the content.
        if (!box->node() || !box->node()->rendererIsEditable()) {
            m_scrollsHorizontally = m_scrollsHorizontally && box->scrollsOverflowX();
            m_scrollsVertically = m_scrollsVertically && box->scrollsOverflowY();
        }

        m_scrollTarget = BlockElement;

        // Both caches below are self-exclusive.
        if (m_layer->usesCompositedScrolling()) {
            m_forceContentToBeVerticallyScrollable = true;
            m_supportsCompositedScrolling = true;
            ASSERT(m_layer->backing()->hasScrollingLayer());
            m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(m_layer->backing()->scrollingContentsLayer()->platformLayer());
            m_cachedCompositedScrollableLayer = m_layer->backing()->scrollingContentsLayer()->platformLayer();
            ASSERT(!m_cachedNonCompositedScrollableNode);
        } else {
            m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(m_layer->enclosingElement());
            m_cachedNonCompositedScrollableNode = m_layer->enclosingElement();
            ASSERT(!m_cachedCompositedScrollableLayer);
        }
    }
}