| /* |
| * 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 "core/rendering/LayoutState.h" |
| |
| #include "core/rendering/RenderInline.h" |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/RenderView.h" |
| #include "platform/Partitions.h" |
| |
| namespace blink { |
| |
| LayoutState::LayoutState(LayoutUnit pageLogicalHeight, bool pageLogicalHeightChanged, RenderView& view) |
| : m_isPaginated(pageLogicalHeight) |
| , m_pageLogicalHeightChanged(pageLogicalHeightChanged) |
| , m_containingBlockLogicalWidthChanged(false) |
| , m_columnInfo(0) |
| , m_next(0) |
| , m_pageLogicalHeight(pageLogicalHeight) |
| , m_renderer(view) |
| { |
| ASSERT(!view.layoutState()); |
| view.pushLayoutState(*this); |
| } |
| |
| LayoutState::LayoutState(RenderBox& renderer, const LayoutSize& offset, LayoutUnit pageLogicalHeight, bool pageLogicalHeightChanged, ColumnInfo* columnInfo, bool containingBlockLogicalWidthChanged) |
| : m_containingBlockLogicalWidthChanged(containingBlockLogicalWidthChanged) |
| , m_columnInfo(columnInfo) |
| , m_next(renderer.view()->layoutState()) |
| , m_renderer(renderer) |
| { |
| renderer.view()->pushLayoutState(*this); |
| bool fixed = renderer.isOutOfFlowPositioned() && renderer.style()->position() == FixedPosition; |
| if (fixed) { |
| // FIXME: This doesn't work correctly with transforms. |
| FloatPoint fixedOffset = renderer.view()->localToAbsolute(FloatPoint(), IsFixed); |
| m_layoutOffset = LayoutSize(fixedOffset.x(), fixedOffset.y()) + offset; |
| } else { |
| m_layoutOffset = m_next->m_layoutOffset + offset; |
| } |
| |
| if (renderer.isOutOfFlowPositioned() && !fixed) { |
| if (RenderObject* container = renderer.container()) { |
| if (container->style()->hasInFlowPosition() && container->isRenderInline()) |
| m_layoutOffset += toRenderInline(container)->offsetForInFlowPositionedInline(renderer); |
| } |
| } |
| // If we establish a new page height, then cache the offset to the top of the first page. |
| // We can compare this later on to figure out what part of the page we're actually on, |
| if (pageLogicalHeight || m_columnInfo || renderer.isRenderFlowThread()) { |
| m_pageLogicalHeight = pageLogicalHeight; |
| bool isFlipped = renderer.style()->isFlippedBlocksWritingMode(); |
| m_pageOffset = LayoutSize(m_layoutOffset.width() + (!isFlipped ? renderer.borderLeft() + renderer.paddingLeft() : renderer.borderRight() + renderer.paddingRight()), |
| m_layoutOffset.height() + (!isFlipped ? renderer.borderTop() + renderer.paddingTop() : renderer.borderBottom() + renderer.paddingBottom())); |
| m_pageLogicalHeightChanged = pageLogicalHeightChanged; |
| m_isPaginated = true; |
| } else { |
| // If we don't establish a new page height, then propagate the old page height and offset down. |
| m_pageLogicalHeight = m_next->m_pageLogicalHeight; |
| m_pageLogicalHeightChanged = m_next->m_pageLogicalHeightChanged; |
| m_pageOffset = m_next->m_pageOffset; |
| |
| // Disable pagination for objects we don't support. For now this includes overflow:scroll/auto, inline blocks and |
| // writing mode roots. |
| if (renderer.isUnsplittableForPagination()) { |
| m_pageLogicalHeight = 0; |
| m_isPaginated = false; |
| } else { |
| m_isPaginated = m_pageLogicalHeight || m_next->m_columnInfo || renderer.flowThreadContainingBlock(); |
| } |
| } |
| |
| if (!m_columnInfo) |
| m_columnInfo = m_next->m_columnInfo; |
| |
| // FIXME: <http://bugs.webkit.org/show_bug.cgi?id=13443> Apply control clip if present. |
| } |
| |
| LayoutState::LayoutState(RenderObject& root) |
| : m_isPaginated(false) |
| , m_pageLogicalHeightChanged(false) |
| , m_containingBlockLogicalWidthChanged(false) |
| , m_columnInfo(0) |
| , m_next(root.view()->layoutState()) |
| , m_pageLogicalHeight(0) |
| , m_renderer(root) |
| { |
| // FIXME: Why does RenderTableSection create this wonky LayoutState? |
| ASSERT(!m_next || root.isTableSection()); |
| // We'll end up pushing in RenderView itself, so don't bother adding it. |
| if (root.isRenderView()) |
| return; |
| |
| root.view()->pushLayoutState(*this); |
| |
| RenderObject* container = root.container(); |
| FloatPoint absContentPoint = container->localToAbsolute(FloatPoint(), UseTransforms); |
| m_layoutOffset = LayoutSize(absContentPoint.x(), absContentPoint.y()); |
| } |
| |
| LayoutState::~LayoutState() |
| { |
| if (m_renderer.view()->layoutState()) { |
| ASSERT(m_renderer.view()->layoutState() == this); |
| m_renderer.view()->popLayoutState(); |
| } |
| } |
| |
| void LayoutState::clearPaginationInformation() |
| { |
| m_pageLogicalHeight = m_next->m_pageLogicalHeight; |
| m_pageOffset = m_next->m_pageOffset; |
| m_columnInfo = m_next->m_columnInfo; |
| } |
| |
| LayoutUnit LayoutState::pageLogicalOffset(const RenderBox& child, const LayoutUnit& childLogicalOffset) const |
| { |
| if (child.isHorizontalWritingMode()) |
| return m_layoutOffset.height() + childLogicalOffset - m_pageOffset.height(); |
| return m_layoutOffset.width() + childLogicalOffset - m_pageOffset.width(); |
| } |
| |
| void LayoutState::addForcedColumnBreak(const RenderBox& child, const LayoutUnit& childLogicalOffset) |
| { |
| if (!m_columnInfo || m_columnInfo->columnHeight()) |
| return; |
| m_columnInfo->addForcedBreak(pageLogicalOffset(child, childLogicalOffset)); |
| } |
| |
| } // namespace blink |