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      1 /*
      2  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AS IS AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include "config.h"
     31 #include "core/rendering/shapes/ShapeOutsideInfo.h"
     32 
     33 #include "core/rendering/RenderBox.h"
     34 
     35 namespace WebCore {
     36 bool ShapeOutsideInfo::isEnabledFor(const RenderBox* box)
     37 {
     38     ShapeValue* value = box->style()->shapeOutside();
     39     return box->isFloatingWithShapeOutside() && value->type() == ShapeValue::Shape && value->shape();
     40 }
     41 
     42 bool ShapeOutsideInfo::computeSegmentsForContainingBlockLine(LayoutUnit lineTop, LayoutUnit floatTop, LayoutUnit lineHeight)
     43 {
     44     LayoutUnit lineTopInShapeCoordinates = lineTop - floatTop + logicalTopOffset();
     45     return computeSegmentsForLine(lineTopInShapeCoordinates, lineHeight);
     46 }
     47 
     48 bool ShapeOutsideInfo::computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight)
     49 {
     50     if (shapeSizeDirty() || m_lineTop != lineTop || m_lineHeight != lineHeight) {
     51         if (ShapeInfo<RenderBox, &RenderStyle::shapeOutside, &Shape::getExcludedIntervals>::computeSegmentsForLine(lineTop, lineHeight)) {
     52             m_leftSegmentMarginBoxDelta = m_segments[0].logicalLeft + m_renderer->marginStart();
     53             m_rightSegmentMarginBoxDelta = m_segments[m_segments.size()-1].logicalRight - m_renderer->logicalWidth() - m_renderer->marginEnd();
     54         } else {
     55             m_leftSegmentMarginBoxDelta = m_renderer->logicalWidth() + m_renderer->marginStart();
     56             m_rightSegmentMarginBoxDelta = -m_renderer->logicalWidth() - m_renderer->marginEnd();
     57         }
     58         m_lineTop = lineTop;
     59     }
     60 
     61     return m_segments.size();
     62 }
     63 
     64 }
     65