Exemplo n.º 1
0
void PaintLayerClipper::calculateClipRects(const ClipRectsContext& context, ClipRects& clipRects) const
{
    bool rootLayerScrolls = m_layoutObject.document().settings() && m_layoutObject.document().settings()->rootLayerScrolls();
    if (!m_layoutObject.layer()->parent() && !rootLayerScrolls) {
        // The root layer's clip rect is always infinite.
        clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
        return;
    }

    bool isClippingRoot = m_layoutObject.layer() == context.rootLayer;

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    PaintLayer* parentLayer = !isClippingRoot ? m_layoutObject.layer()->parent() : 0;
    // Ensure that our parent's clip has been calculated so that we can examine the values.
    if (parentLayer) {
        // FIXME: Why don't we just call getClipRects here?
        if (context.usesCache() && parentLayer->clipper().cachedClipRects(context)) {
            clipRects = *parentLayer->clipper().cachedClipRects(context);
        } else {
            parentLayer->clipper().calculateClipRects(context, clipRects);
        }
    } else {
        clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
    }

    adjustClipRectsForChildren(m_layoutObject, clipRects);

    if ((m_layoutObject.hasOverflowClip() && shouldRespectOverflowClip(context)) || m_layoutObject.hasClip()) {
        // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
        // some transformed layer boundary, for example, in the PaintLayerCompositor overlapMap, where
        // clipRects are needed in view space.
        applyClipRects(context, m_layoutObject, roundedLayoutPoint(m_layoutObject.localToContainerPoint(FloatPoint(), context.rootLayer->layoutObject())), clipRects);
    }
}
Exemplo n.º 2
0
void RenderLayerClipper::calculateClipRects(const ClipRectsContext& context, ClipRects& clipRects) const
{
    if (!m_renderer.layer()->parent()) {
        // The root layer's clip rect is always infinite.
        clipRects.reset(PaintInfo::infiniteRect());
        return;
    }

    bool isClippingRoot = m_renderer.layer() == context.rootLayer;

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    RenderLayer* parentLayer = !isClippingRoot ? m_renderer.layer()->parent() : 0;

    // Ensure that our parent's clip has been calculated so that we can examine the values.
    if (parentLayer) {
        // FIXME: Why don't we just call getClipRects here?
        if (context.usesCache() && parentLayer->clipper().cachedClipRects(context)) {
            clipRects = *parentLayer->clipper().cachedClipRects(context);
        } else {
            parentLayer->clipper().calculateClipRects(context, clipRects);
        }
    } else {
        clipRects.reset(PaintInfo::infiniteRect());
    }

    if (m_renderer.style()->position() == AbsolutePosition) {
        clipRects.setOverflowClipRect(clipRects.posClipRect());
    }

    // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
    // some transformed layer boundary, for example, in the RenderLayerCompositor overlapMap, where
    // clipRects are needed in view space.
    LayoutPoint offset = roundedLayoutPoint(m_renderer.localToContainerPoint(FloatPoint(), context.rootLayer->renderer()));
    if (m_renderer.hasOverflowClip()) {
        ClipRect newOverflowClip = m_renderer.overflowClipRect(offset);
        newOverflowClip.setHasRadius(m_renderer.style()->hasBorderRadius());
        clipRects.setOverflowClipRect(intersection(newOverflowClip, clipRects.overflowClipRect()));
        if (m_renderer.isPositioned())
            clipRects.setPosClipRect(intersection(newOverflowClip, clipRects.posClipRect()));
    }

    if (m_renderer.hasClip()) {
        LayoutRect newClip = m_renderer.clipRect(offset);
        clipRects.setPosClipRect(intersection(newClip, clipRects.posClipRect()));
        clipRects.setOverflowClipRect(intersection(newClip, clipRects.overflowClipRect()));
    }
}
Exemplo n.º 3
0
ClipRect RenderLayerClipper::backgroundClipRect(const ClipRectsContext& context) const
{
    ASSERT(m_renderer.layer()->parent());
    ASSERT(m_renderer.view());

    ClipRects parentClipRects;
    if (m_renderer.layer() == context.rootLayer)
        parentClipRects.reset(PaintInfo::infiniteRect());
    else
        m_renderer.layer()->parent()->clipper().getOrCalculateClipRects(context, parentClipRects);

    return backgroundClipRectForPosition(parentClipRects, m_renderer.style()->position());
}
Exemplo n.º 4
0
void PaintLayerClipper::calculateClipRects(const ClipRectsContext& context,
                                           ClipRects& clipRects) const {
  const LayoutBoxModelObject& layoutObject = *m_layer.layoutObject();
  if (!m_layer.parent() &&
      !RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
    // The root layer's clip rect is always infinite.
    clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
    return;
  }

  bool isClippingRoot = &m_layer == context.rootLayer;

  // For transformed layers, the root layer was shifted to be us, so there is no
  // need to examine the parent. We want to cache clip rects with us as the
  // root.
  PaintLayer* parentLayer = !isClippingRoot ? m_layer.parent() : nullptr;
  // Ensure that our parent's clip has been calculated so that we can examine
  // the values.
  if (parentLayer) {
    parentLayer->clipper().getOrCalculateClipRects(context, clipRects);
  } else {
    clipRects.reset(LayoutRect(LayoutRect::infiniteIntRect()));
  }

  adjustClipRectsForChildren(layoutObject, clipRects);

  if (shouldClipOverflow(context) || layoutObject.hasClip() ||
      (layoutObject.isSVGRoot() &&
       toLayoutSVGRoot(&layoutObject)->shouldApplyViewportClip())) {
    // This offset cannot use convertToLayerCoords, because sometimes our
    // rootLayer may be across some transformed layer boundary, for example, in
    // the PaintLayerCompositor overlapMap, where clipRects are needed in view
    // space.
    applyClipRects(context, layoutObject,
                   roundedLayoutPoint(layoutObject.localToAncestorPoint(
                       FloatPoint(), context.rootLayer->layoutObject())),
                   clipRects);
  }
}
Exemplo n.º 5
0
ClipRect RenderLayerClipper::backgroundClipRect(const ClipRectsContext& context) const
{
    ASSERT(m_renderer.layer()->parent());

    ClipRects parentClipRects;
    if (m_renderer.layer() == context.rootLayer)
        parentClipRects.reset(PaintInfo::infiniteRect());
    else
        m_renderer.layer()->parent()->clipper().getOrCalculateClipRects(context, parentClipRects);

    if (m_renderer.style()->position() == AbsolutePosition)
        return parentClipRects.posClipRect();
    return parentClipRects.overflowClipRect();
}
Exemplo n.º 6
0
void RenderLayerClipper::calculateClipRects(const ClipRectsContext& context, ClipRects& clipRects) const
{
    if (!m_renderer.layer()->parent()) {
        // The root layer's clip rect is always infinite.
        clipRects.reset(PaintInfo::infiniteRect());
        return;
    }

    bool isClippingRoot = m_renderer.layer() == context.rootLayer;

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    RenderLayer* parentLayer = !isClippingRoot ? m_renderer.layer()->parent() : 0;

    // Ensure that our parent's clip has been calculated so that we can examine the values.
    if (parentLayer) {
        // FIXME: Why don't we just call getClipRects here?
        if (context.usesCache() && parentLayer->clipper().cachedClipRects(context)) {
            clipRects = *parentLayer->clipper().cachedClipRects(context);
        } else {
            parentLayer->clipper().calculateClipRects(context, clipRects);
        }
    } else {
        clipRects.reset(PaintInfo::infiniteRect());
    }

    adjustClipRectsForChildren(m_renderer, clipRects);

    // FIXME: This logic looks wrong. We'll apply overflow clip rects even if we were told to IgnoreOverflowClip if m_renderer.hasClip().
    if ((m_renderer.hasOverflowClip() && (context.respectOverflowClip == RespectOverflowClip || !isClippingRoot)) || m_renderer.hasClip()) {
        // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
        // some transformed layer boundary, for example, in the RenderLayerCompositor overlapMap, where
        // clipRects are needed in view space.
        applyClipRects(context, m_renderer, roundedLayoutPoint(m_renderer.localToContainerPoint(FloatPoint(), context.rootLayer->renderer())), clipRects);
    }
}
Exemplo n.º 7
0
void RenderLayerClipper::parentClipRects(const ClipRectsContext& clipRectsContext, ClipRects& clipRects) const
{
    // The root is not clipped.
    if (isClippingRootForContext(clipRectsContext)) {
        clipRects.reset(PaintInfo::infiniteRect());
        return;
    }

    ASSERT(m_renderer.layer()->parent());

    RenderLayerClipper& parentClipper = m_renderer.layer()->parent()->clipper();
    if (clipRectsContext.clipRectsType == TemporaryClipRects) {
        parentClipper.calculateClipRects(clipRectsContext, clipRects);
        return;
    }

    parentClipper.updateClipRects(clipRectsContext);
    clipRects = *parentClipper.clipRects(clipRectsContext);
}
Exemplo n.º 8
0
ClipRect RenderLayerClipper::backgroundClipRect(const ClipRectsContext& context) const
{
    ASSERT(m_renderer.layer()->parent());
    ASSERT(m_renderer.view());

    ClipRects parentClipRects;
    if (m_renderer.layer() == context.rootLayer)
        parentClipRects.reset(PaintInfo::infiniteRect());
    else
        m_renderer.layer()->parent()->clipper().getOrCalculateClipRects(context, parentClipRects);

    ClipRect result = backgroundClipRectForPosition(parentClipRects, m_renderer.style()->position());

    // Note: infinite clipRects should not be scrolled here, otherwise they will accidentally no longer be considered infinite.
    if (parentClipRects.fixed() && context.rootLayer->renderer() == m_renderer.view() && result != PaintInfo::infiniteRect())
        result.move(m_renderer.view()->frameView()->scrollOffsetForFixedPosition());

    return result;
}
Exemplo n.º 9
0
void RenderLayerClipper::calculateClipRects(const ClipRectsContext& clipRectsContext, ClipRects& clipRects) const
{
    if (!m_renderer->layer()->parent()) {
        // The root layer's clip rect is always infinite.
        clipRects.reset(PaintInfo::infiniteRect());
        return;
    }

    ClipRectsType clipRectsType = clipRectsContext.clipRectsType;
    bool useCached = clipRectsType != TemporaryClipRects;

    // For transformed layers, the root layer was shifted to be us, so there is no need to
    // examine the parent. We want to cache clip rects with us as the root.
    RenderLayer* parentLayer = clipRectsContext.rootLayer != m_renderer->layer() ? m_renderer->layer()->parent() : 0;

    // Ensure that our parent's clip has been calculated so that we can examine the values.
    if (parentLayer) {
        if (useCached && parentLayer->clipper().clipRects(clipRectsContext)) {
            clipRects = *parentLayer->clipper().clipRects(clipRectsContext);
        } else {
            ClipRectsContext parentContext(clipRectsContext);
            parentContext.overlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize; // FIXME: why?
            parentLayer->clipper().calculateClipRects(parentContext, clipRects);
        }
    } else {
        clipRects.reset(PaintInfo::infiniteRect());
    }

    // A fixed object is essentially the root of its containing block hierarchy, so when
    // we encounter such an object, we reset our clip rects to the fixedClipRect.
    if (m_renderer->style()->position() == FixedPosition) {
        clipRects.setPosClipRect(clipRects.fixedClipRect());
        clipRects.setOverflowClipRect(clipRects.fixedClipRect());
        clipRects.setFixed(true);
    } else if (m_renderer->style()->hasInFlowPosition()) {
        clipRects.setPosClipRect(clipRects.overflowClipRect());
    } else if (m_renderer->style()->position() == AbsolutePosition) {
        clipRects.setOverflowClipRect(clipRects.posClipRect());
    }

    // Update the clip rects that will be passed to child layers.
    if ((m_renderer->hasOverflowClip() && (clipRectsContext.respectOverflowClip == RespectOverflowClip || m_renderer->layer() != clipRectsContext.rootLayer)) || m_renderer->hasClip()) {
        // This layer establishes a clip of some kind.

        // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
        // some transformed layer boundary, for example, in the RenderLayerCompositor overlapMap, where
        // clipRects are needed in view space.
        LayoutPoint offset;
        offset = roundedLayoutPoint(m_renderer->localToContainerPoint(FloatPoint(), clipRectsContext.rootLayer->renderer()));
        RenderView* view = m_renderer->view();
        ASSERT(view);
        if (view && clipRects.fixed() && clipRectsContext.rootLayer->renderer() == view) {
            offset -= view->frameView()->scrollOffsetForFixedPosition();
        }

        if (m_renderer->hasOverflowClip()) {
            ClipRect newOverflowClip = toRenderBox(m_renderer)->overflowClipRect(offset, clipRectsContext.region, clipRectsContext.overlayScrollbarSizeRelevancy);
            if (m_renderer->style()->hasBorderRadius())
                newOverflowClip.setHasRadius(true);
            clipRects.setOverflowClipRect(intersection(newOverflowClip, clipRects.overflowClipRect()));
            if (m_renderer->isPositioned())
                clipRects.setPosClipRect(intersection(newOverflowClip, clipRects.posClipRect()));
        }
        if (m_renderer->hasClip()) {
            LayoutRect newPosClip = toRenderBox(m_renderer)->clipRect(offset, clipRectsContext.region);
            clipRects.setPosClipRect(intersection(newPosClip, clipRects.posClipRect()));
            clipRects.setOverflowClipRect(intersection(newPosClip, clipRects.overflowClipRect()));
            clipRects.setFixedClipRect(intersection(newPosClip, clipRects.fixedClipRect()));
        }
    }
}