/* | |
* Copyright (C) 2007 Apple Inc. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#include "config.h" | |
#include "LayoutState.h" | |
#include "RenderArena.h" | |
#include "RenderInline.h" | |
#include "RenderLayer.h" | |
#include "RenderView.h" | |
namespace WebCore { | |
LayoutState::LayoutState(LayoutState* prev, RenderBox* renderer, const IntSize& offset) | |
: m_next(prev) | |
#ifndef NDEBUG | |
, m_renderer(renderer) | |
#endif | |
{ | |
ASSERT(m_next); | |
bool fixed = renderer->isPositioned() && renderer->style()->position() == FixedPosition; | |
if (fixed) { | |
// FIXME: This doesn't work correctly with transforms. | |
FloatPoint fixedOffset = renderer->view()->localToAbsolute(FloatPoint(), true); | |
m_offset = IntSize(fixedOffset.x(), fixedOffset.y()) + offset; | |
} else | |
m_offset = prev->m_offset + offset; | |
if (renderer->isRelPositioned()) { | |
if (renderer->hasLayer()) | |
m_offset += renderer->layer()->relativePositionOffset(); | |
} else if (renderer->isPositioned() && !fixed) { | |
if (RenderObject* container = renderer->container()) { | |
if (container->isRelPositioned() && container->isRenderInline()) | |
m_offset += toRenderInline(container)->relativePositionedInlineOffset(renderer); | |
} | |
} | |
m_clipped = !fixed && prev->m_clipped; | |
if (m_clipped) | |
m_clipRect = prev->m_clipRect; | |
if (renderer->hasOverflowClip()) { | |
RenderLayer* layer = renderer->layer(); | |
IntRect clipRect(toPoint(m_offset) + renderer->view()->layoutDelta(), layer->size()); | |
if (m_clipped) | |
m_clipRect.intersect(clipRect); | |
else { | |
m_clipRect = clipRect; | |
m_clipped = true; | |
} | |
m_offset -= layer->scrolledContentOffset(); | |
} | |
m_layoutDelta = m_next->m_layoutDelta; | |
// FIXME: <http://bugs.webkit.org/show_bug.cgi?id=13443> Apply control clip if present. | |
} | |
LayoutState::LayoutState(RenderObject* root) | |
: m_clipped(false) | |
, m_next(0) | |
#ifndef NDEBUG | |
, m_renderer(root) | |
#endif | |
{ | |
RenderObject* container = root->container(); | |
FloatPoint absContentPoint = container->localToAbsolute(FloatPoint(), false, true); | |
m_offset = IntSize(absContentPoint.x(), absContentPoint.y()); | |
} | |
#ifndef NDEBUG | |
static bool inLayoutStateDestroy; | |
#endif | |
void LayoutState::destroy(RenderArena* renderArena) | |
{ | |
#ifndef NDEBUG | |
inLayoutStateDestroy = true; | |
#endif | |
delete this; | |
#ifndef NDEBUG | |
inLayoutStateDestroy = false; | |
#endif | |
renderArena->free(*(size_t*)this, this); | |
} | |
void* LayoutState::operator new(size_t sz, RenderArena* renderArena) throw() | |
{ | |
return renderArena->allocate(sz); | |
} | |
void LayoutState::operator delete(void* ptr, size_t sz) | |
{ | |
ASSERT(inLayoutStateDestroy); | |
*(size_t*)ptr = sz; | |
} | |
} // namespace WebCore |