RenderLayerModelObject.cpp [plain text]
#include "config.h"
#include "RenderLayerModelObject.h"
#include "RenderLayer.h"
#include "RenderView.h"
using namespace std;
namespace WebCore {
bool RenderLayerModelObject::s_wasFloating = false;
bool RenderLayerModelObject::s_hadLayer = false;
bool RenderLayerModelObject::s_hadTransform = false;
bool RenderLayerModelObject::s_layerWasSelfPainting = false;
RenderLayerModelObject::RenderLayerModelObject(ContainerNode* node)
: RenderObject(node)
, m_layer(0)
{
}
RenderLayerModelObject::~RenderLayerModelObject()
{
ASSERT(!hasLayer());
ASSERT(!m_layer);
}
void RenderLayerModelObject::destroyLayer()
{
ASSERT(!hasLayer()); ASSERT(m_layer);
m_layer->destroy(renderArena());
m_layer = 0;
}
void RenderLayerModelObject::ensureLayer()
{
if (m_layer)
return;
m_layer = new (renderArena()) RenderLayer(this);
setHasLayer(true);
m_layer->insertOnlyThisLayer();
}
bool RenderLayerModelObject::hasSelfPaintingLayer() const
{
return m_layer && m_layer->isSelfPaintingLayer();
}
void RenderLayerModelObject::willBeDestroyed()
{
if (isPositioned()) {
if (Frame* frame = this->frame()) {
if (FrameView* frameView = frame->view()) {
if (style()->hasViewportConstrainedPosition())
frameView->removeViewportConstrainedObject(this);
}
}
}
RenderObject::willBeDestroyed();
}
void RenderLayerModelObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
{
s_wasFloating = isFloating();
s_hadLayer = hasLayer();
s_hadTransform = hasTransform();
if (s_hadLayer)
s_layerWasSelfPainting = layer()->isSelfPaintingLayer();
RenderStyle* oldStyle = style();
if (oldStyle && newStyle) {
if (parent()) {
if (diff == StyleDifferenceRepaintLayer) {
layer()->repaintIncludingDescendants();
if (!(oldStyle->clip() == newStyle->clip()))
layer()->clearClipRectsIncludingDescendants();
} else if (diff == StyleDifferenceRepaint || newStyle->outlineSize() < oldStyle->outlineSize())
repaint();
}
if (diff == StyleDifferenceLayout || diff == StyleDifferenceSimplifiedLayout) {
if (hasLayer()) {
if (oldStyle->position() != newStyle->position()
|| oldStyle->zIndex() != newStyle->zIndex()
|| oldStyle->hasAutoZIndex() != newStyle->hasAutoZIndex()
|| !(oldStyle->clip() == newStyle->clip())
|| oldStyle->hasClip() != newStyle->hasClip()
|| oldStyle->opacity() != newStyle->opacity()
|| oldStyle->transform() != newStyle->transform()
#if ENABLE(CSS_FILTERS)
|| oldStyle->filter() != newStyle->filter()
#endif
)
layer()->repaintIncludingDescendants();
} else if (newStyle->hasTransform() || newStyle->opacity() < 1 || newStyle->hasFilter()) {
repaint();
}
}
}
RenderObject::styleWillChange(diff, newStyle);
}
void RenderLayerModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderObject::styleDidChange(diff, oldStyle);
updateFromStyle();
if (requiresLayer()) {
if (!layer() && layerCreationAllowedForSubtree()) {
if (s_wasFloating && isFloating())
setChildNeedsLayout(true);
ensureLayer();
if (parent() && !needsLayout() && containingBlock()) {
layer()->setRepaintStatus(NeedsFullRepaint);
layer()->updateLayerPositions(0);
}
}
} else if (layer() && layer()->parent()) {
setHasTransform(false); setHasReflection(false);
layer()->removeOnlyThisLayer(); if (s_wasFloating && isFloating())
setChildNeedsLayout(true);
if (s_hadTransform)
setNeedsLayoutAndPrefWidthsRecalc();
}
if (layer()) {
layer()->styleChanged(diff, oldStyle);
if (s_hadLayer && layer()->isSelfPaintingLayer() != s_layerWasSelfPainting)
setChildNeedsLayout(true);
}
if (FrameView *frameView = view()->frameView()) {
bool newStyleIsViewportConstained = style()->hasViewportConstrainedPosition();
bool oldStyleIsViewportConstrained = oldStyle && oldStyle->hasViewportConstrainedPosition();
if (newStyleIsViewportConstained != oldStyleIsViewportConstrained) {
if (newStyleIsViewportConstained && layer())
frameView->addViewportConstrainedObject(this);
else
frameView->removeViewportConstrainedObject(this);
}
}
}
}