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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/ShapeInfo.h"
     32 
     33 #include "core/rendering/RenderRegion.h"
     34 #include "core/rendering/shapes/Shape.h"
     35 #include "core/rendering/style/RenderStyle.h"
     36 
     37 namespace WebCore {
     38 template<class RenderType, ShapeValue* (RenderStyle::*shapeGetter)() const, void (Shape::*intervalGetter)(LayoutUnit, LayoutUnit, SegmentList&) const>
     39 const Shape* ShapeInfo<RenderType, shapeGetter, intervalGetter>::computedShape() const
     40 {
     41     if (Shape* shape = m_shape.get())
     42         return shape;
     43 
     44     ShapeValue* shapeValue = (m_renderer->style()->*shapeGetter)();
     45     BasicShape* shape = (shapeValue && shapeValue->type() == ShapeValue::Shape) ? shapeValue->shape() : 0;
     46 
     47     ASSERT(shape);
     48 
     49     m_shape = Shape::createShape(shape, LayoutSize(m_shapeLogicalWidth, m_shapeLogicalHeight), m_renderer->style()->writingMode(), m_renderer->style()->shapeMargin(), m_renderer->style()->shapePadding());
     50     ASSERT(m_shape);
     51     return m_shape.get();
     52 }
     53 
     54 template<class RenderType, ShapeValue* (RenderStyle::*shapeGetter)() const, void (Shape::*intervalGetter)(LayoutUnit, LayoutUnit, SegmentList&) const>
     55 bool ShapeInfo<RenderType, shapeGetter, intervalGetter>::computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight)
     56 {
     57     ASSERT(lineHeight >= 0);
     58     m_shapeLineTop = lineTop - logicalTopOffset();
     59     m_lineHeight = lineHeight;
     60     m_segments.clear();
     61 
     62     if (lineOverlapsShapeBounds())
     63         (computedShape()->*intervalGetter)(m_shapeLineTop, std::min(m_lineHeight, shapeLogicalBottom() - lineTop), m_segments);
     64 
     65     LayoutUnit logicalLeftOffset = this->logicalLeftOffset();
     66     for (size_t i = 0; i < m_segments.size(); i++) {
     67         m_segments[i].logicalLeft += logicalLeftOffset;
     68         m_segments[i].logicalRight += logicalLeftOffset;
     69     }
     70 
     71     return m_segments.size();
     72 }
     73 
     74 template class ShapeInfo<RenderBlock, &RenderStyle::resolvedShapeInside, &Shape::getIncludedIntervals>;
     75 template class ShapeInfo<RenderBox, &RenderStyle::shapeOutside, &Shape::getExcludedIntervals>;
     76 }
     77