C++ RenderObject::hasLayer方法代码示例

void write(TextStream& ts, const RenderObject& o, int indent)
{
#if ENABLE(SVG)
    if (o.isRenderPath()) {
        write(ts, *toRenderPath(&o), indent);
        return;
    }
    if (o.isSVGContainer()) {
        writeSVGContainer(ts, o, indent);
        return;
    }
    if (o.isSVGRoot()) {
        write(ts, *toRenderSVGRoot(&o), indent);
        return;
    }
    if (o.isSVGText()) {
        if (!o.isText())
            writeSVGText(ts, *toRenderBlock(&o), indent);
        else
            writeSVGInlineText(ts, *toRenderText(&o), indent);
        return;
    }
    if (o.isSVGImage()) {
        writeSVGImage(ts, *toRenderImage(&o), indent);
        return;
    }
#endif

    writeIndent(ts, indent);

    ts << o << "\n";

    if (o.isText() && !o.isBR()) {
        const RenderText& text = *toRenderText(&o);
        for (InlineTextBox* box = text.firstTextBox(); box; box = box->nextTextBox()) {
            writeIndent(ts, indent + 1);
            writeTextRun(ts, text, *box);
        }
    }

    for (RenderObject* child = o.firstChild(); child; child = child->nextSibling()) {
        if (child->hasLayer())
            continue;
        write(ts, *child, indent + 1);
    }

    if (o.isWidget()) {
        Widget* widget = toRenderWidget(&o)->widget();
        if (widget && widget->isFrameView()) {
            FrameView* view = static_cast<FrameView*>(widget);
            RenderView* root = view->frame()->contentRenderer();
            if (root) {
                view->layout();
                RenderLayer* l = root->layer();
                if (l)
                    writeLayers(ts, l, l, IntRect(l->x(), l->y(), l->width(), l->height()), indent + 1);
            }
        }
    }
}

TEST_F(ScrollingCoordinatorChromiumTest, touchOverflowScrolling)
{
    registerMockedHttpURLLoad("touch-overflow-scrolling.html");
    navigateTo(m_baseURL + "touch-overflow-scrolling.html");

    // Verify the properties of the accelerated scrolling element starting from the RenderObject
    // all the way to the WebLayer.
    Element* scrollableElement = m_webViewImpl->mainFrameImpl()->frame()->document()->getElementById("scrollable");
    ASSERT(scrollableElement);

    RenderObject* renderer = scrollableElement->renderer();
    ASSERT_TRUE(renderer->isBoxModelObject());
    ASSERT_TRUE(renderer->hasLayer());

    RenderLayer* layer = toRenderBoxModelObject(renderer)->layer();
    ASSERT_TRUE(layer->usesCompositedScrolling());
    ASSERT_TRUE(layer->isComposited());

    RenderLayerBacking* layerBacking = layer->backing();
    ASSERT_TRUE(layerBacking->hasScrollingLayer());
    ASSERT(layerBacking->scrollingContentsLayer());

    GraphicsLayerChromium* graphicsLayerChromium = static_cast<GraphicsLayerChromium*>(layerBacking->scrollingContentsLayer());
    ASSERT_EQ(layer, graphicsLayerChromium->scrollableArea());

    WebLayer* webScrollLayer = static_cast<WebLayer*>(layerBacking->scrollingContentsLayer()->platformLayer());
    ASSERT_TRUE(webScrollLayer->scrollable());
}

IntRect RenderInline::clippedOverflowRectForRepaint(RenderBox* repaintContainer)
{
    // Only run-ins are allowed in here during layout.
    ASSERT(!view() || !view()->layoutStateEnabled() || isRunIn());

    if (!firstLineBox() && !continuation())
        return IntRect();

    // Find our leftmost position.
    IntRect boundingBox(linesBoundingBox());
    int left = boundingBox.x();
    int top = boundingBox.y();

    // Now invalidate a rectangle.
    int ow = style() ? style()->outlineSize() : 0;
    
    // We need to add in the relative position offsets of any inlines (including us) up to our
    // containing block.
    RenderBlock* cb = containingBlock();
    for (RenderObject* inlineFlow = this; inlineFlow && inlineFlow->isRenderInline() && inlineFlow != cb; 
         inlineFlow = inlineFlow->parent()) {
         if (inlineFlow->style()->position() == RelativePosition && inlineFlow->hasLayer())
            toRenderBox(inlineFlow)->layer()->relativePositionOffset(left, top);
    }

    IntRect r(-ow + left, -ow + top, boundingBox.width() + ow * 2, boundingBox.height() + ow * 2);
    if (cb->hasColumns())
        cb->adjustRectForColumns(r);

    if (cb->hasOverflowClip()) {
        // cb->height() is inaccurate if we're in the middle of a layout of |cb|, so use the
        // layer's size instead.  Even if the layer's size is wrong, the layer itself will repaint
        // anyway if its size does change.
        int x = r.x();
        int y = r.y();
        IntRect boxRect(0, 0, cb->layer()->width(), cb->layer()->height());
        cb->layer()->subtractScrolledContentOffset(x, y); // For overflow:auto/scroll/hidden.
        IntRect repaintRect(x, y, r.width(), r.height());
        r = intersection(repaintRect, boxRect);
    }
    ASSERT(repaintContainer != this);
    cb->computeRectForRepaint(r, repaintContainer);

    if (ow) {
        for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) {
            if (!curr->isText()) {
                IntRect childRect = curr->rectWithOutlineForRepaint(repaintContainer, ow);
                r.unite(childRect);
            }
        }

        if (continuation() && !continuation()->isInline()) {
            IntRect contRect = continuation()->rectWithOutlineForRepaint(repaintContainer, ow);
            r.unite(contRect);
        }
    }

    return r;
}

// Hit Testing
bool RenderTableRow::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction action)
{
    // Table rows cannot ever be hit tested.  Effectively they do not exist.
    // Just forward to our children always.
    for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
        // FIXME: We have to skip over inline flows, since they can show up inside table rows
        // at the moment (a demoted inline <form> for example). If we ever implement a
        // table-specific hit-test method (which we should do for performance reasons anyway),
        // then we can remove this check.
        if (!child->hasLayer() && !child->isInlineFlow() && child->nodeAtPoint(request, result, x, y, tx, ty, action)) {
            updateHitTestResult(result, IntPoint(x - tx, y - ty));
            return true;
        }
    }
    
    return false;
}

bool ScrollingCoordinator::hasVisibleSlowRepaintViewportConstrainedObjects(FrameView* frameView) const
{
    const FrameView::ViewportConstrainedObjectSet* viewportConstrainedObjects = frameView->viewportConstrainedObjects();
    if (!viewportConstrainedObjects)
        return false;

    for (FrameView::ViewportConstrainedObjectSet::const_iterator it = viewportConstrainedObjects->begin(), end = viewportConstrainedObjects->end(); it != end; ++it) {
        RenderObject* viewportConstrainedObject = *it;
        if (!viewportConstrainedObject->isBoxModelObject() || !viewportConstrainedObject->hasLayer())
            return true;
        RenderLayer* layer = toRenderBoxModelObject(viewportConstrainedObject)->layer();
        // Any explicit reason that a fixed position element is not composited shouldn't cause slow scrolling.
        if (!layer->isComposited() && layer->viewportConstrainedNotCompositedReason() == RenderLayer::NoNotCompositedReason)
            return true;
    }
    return false;
}

void RenderTableRow::paint(PaintInfo& paintInfo, int tx, int ty)
{
    ASSERT(m_layer);
    if (!m_layer)
        return;

    for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
        if (child->isTableCell()) {
            // Paint the row background behind the cell.
            if (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseChildBlockBackground) {
                RenderTableCell* cell = static_cast<RenderTableCell*>(child);
                cell->paintBackgroundsBehindCell(paintInfo, tx, ty, this);
            }
            if (!child->hasLayer())
                child->paint(paintInfo, tx, ty);
        }
    }
}

String externalRepresentation(Frame* frame, RenderAsTextBehavior behavior)
{
    frame->document()->updateLayout();

    RenderObject* o = frame->contentRenderer();
    if (!o)
        return String();

    TextStream ts;
#if ENABLE(SVG)
    writeRenderResources(ts, o->document());
#endif
    if (o->hasLayer()) {
        RenderLayer* l = toRenderBox(o)->layer();
        writeLayers(ts, l, l, IntRect(l->x(), l->y(), l->width(), l->height()), 0, behavior);
        writeSelection(ts, o);
    }
    return ts.release();
}

bool ScrollingCoordinator::hasNonLayerFixedObjects(FrameView* frameView) const
{
    const FrameView::ViewportConstrainedObjectSet* viewportConstrainedObjects = frameView->viewportConstrainedObjects();
    if (!viewportConstrainedObjects)
        return false;

#if USE(ACCELERATED_COMPOSITING)
    for (FrameView::ViewportConstrainedObjectSet::const_iterator it = viewportConstrainedObjects->begin(), end = viewportConstrainedObjects->end(); it != end; ++it) {
        RenderObject* viewportConstrainedObject = *it;
        if (!viewportConstrainedObject->isBoxModelObject() || !viewportConstrainedObject->hasLayer())
            return true;
        RenderBoxModelObject* viewportConstrainedBoxModelObject = toRenderBoxModelObject(viewportConstrainedObject);
        if (!viewportConstrainedBoxModelObject->layer()->backing())
            return true;
    }
    return false;
#else
    return viewportConstrainedObjects->size();
#endif
}

void write(TextStream& ts, const RenderObject& o, int indent, RenderAsTextBehavior behavior)
{
    writeIndent(ts, indent);

    RenderTreeAsText::writeRenderObject(ts, o, behavior);
    ts << "\n";

    if (o.isText()) {
        const RenderText& text = toRenderText(o);
        for (InlineTextBox* box = text.firstTextBox(); box; box = box->nextTextBox()) {
            writeIndent(ts, indent + 1);
            writeTextRun(ts, text, *box);
        }
    }

    for (RenderObject* child = o.slowFirstChild(); child; child = child->nextSibling()) {
        if (child->hasLayer())
            continue;
        write(ts, *child, indent + 1, behavior);
    }
}

String externalRepresentation(Frame* frame, RenderAsTextBehavior behavior)
{
    PrintContext printContext(frame);
    if (behavior & RenderAsTextPrintingMode) {
        if (!frame->contentRenderer())
            return String();
        printContext.begin(frame->contentRenderer()->width());
    }

    frame->document()->updateLayout();

    RenderObject* o = frame->contentRenderer();
    if (!o)
        return String();

    TextStream ts;
    if (o->hasLayer()) {
        RenderLayer* l = toRenderBox(o)->layer();
        writeLayers(ts, l, l, IntRect(l->x(), l->y(), l->width(), l->height()), 0, behavior);
        writeSelection(ts, o);
    }
    return ts.release();
}

void write(TextStream& ts, const RenderObject& o, int indent, RenderAsTextBehavior behavior)
{
#if ENABLE(SVG)
    if (o.isSVGShape()) {
        write(ts, *toRenderSVGShape(&o), indent);
        return;
    }
    if (o.isSVGGradientStop()) {
        writeSVGGradientStop(ts, *toRenderSVGGradientStop(&o), indent);
        return;
    }
    if (o.isSVGResourceContainer()) {
        writeSVGResourceContainer(ts, o, indent);
        return;
    }
    if (o.isSVGContainer()) {
        writeSVGContainer(ts, o, indent);
        return;
    }
    if (o.isSVGRoot()) {
        write(ts, *toRenderSVGRoot(&o), indent);
        return;
    }
    if (o.isSVGText()) {
        writeSVGText(ts, *toRenderSVGText(&o), indent);
        return;
    }
    if (o.isSVGInlineText()) {
        writeSVGInlineText(ts, *toRenderSVGInlineText(&o), indent);
        return;
    }
    if (o.isSVGImage()) {
        writeSVGImage(ts, *toRenderSVGImage(&o), indent);
        return;
    }
#endif

    writeIndent(ts, indent);

    RenderTreeAsText::writeRenderObject(ts, o, behavior);
    ts << "\n";

    if (o.isText() && !o.isBR()) {
        const RenderText& text = *toRenderText(&o);
        for (InlineTextBox* box = text.firstTextBox(); box; box = box->nextTextBox()) {
            writeIndent(ts, indent + 1);
            writeTextRun(ts, text, *box);
        }
    }

    for (RenderObject* child = o.firstChild(); child; child = child->nextSibling()) {
        if (child->hasLayer())
            continue;
        write(ts, *child, indent + 1, behavior);
    }

    if (o.isWidget()) {
        Widget* widget = toRenderWidget(&o)->widget();
        if (widget && widget->isFrameView()) {
            FrameView* view = static_cast<FrameView*>(widget);
            RenderView* root = view->frame()->contentRenderer();
            if (root) {
                view->layout();
                RenderLayer* l = root->layer();
                if (l)
                    writeLayers(ts, l, l, l->rect(), indent + 1, behavior);
            }
        }
    }
}