diff options
Diffstat (limited to 'src/3rdparty/webkit/WebCore/rendering/LayoutState.cpp')
-rw-r--r-- | src/3rdparty/webkit/WebCore/rendering/LayoutState.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/rendering/LayoutState.cpp b/src/3rdparty/webkit/WebCore/rendering/LayoutState.cpp new file mode 100644 index 0000000..20d0b99 --- /dev/null +++ b/src/3rdparty/webkit/WebCore/rendering/LayoutState.cpp @@ -0,0 +1,114 @@ +/* + * 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 "RenderLayer.h" +#include "RenderView.h" + +namespace WebCore { + +LayoutState::LayoutState(LayoutState* prev, RenderBox* renderer, const IntSize& offset) +{ + ASSERT(prev); + + m_next = prev; + + 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()) + m_offset += renderer->offsetForPositionedInContainer(container); + } + + m_clipped = !fixed && prev->m_clipped; + if (m_clipped) + m_clipRect = prev->m_clipRect; + if (renderer->hasOverflowClip()) { + int x = m_offset.width(); + int y = m_offset.height(); + RenderLayer* layer = renderer->layer(); + IntRect clipRect(x, y, layer->width(), layer->height()); + clipRect.move(renderer->view()->layoutDelta()); + if (m_clipped) + m_clipRect.intersect(clipRect); + else { + m_clipRect = clipRect; + m_clipped = true; + } + layer->subtractScrolledContentOffset(x, y); + m_offset = IntSize(x, y); + } + // FIXME: <http://bugs.webkit.org/show_bug.cgi?id=13443> Apply control clip if present. +} + +LayoutState::LayoutState(RenderObject* root) + : m_clipped(false) +{ + RenderObject* container = root->container(); + FloatPoint absContentPoint = container->localToAbsoluteForContent(FloatPoint(), false, true); + m_offset = IntSize(absContentPoint.x(), absContentPoint.y()); + m_next = 0; +} + +#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 |