Moving RenderSVG* files from rendering/ to layout/

Source/core/rendering/svg/RenderSVGEllipse.cpp

-/*
- * Copyright (C) 2012 Google, 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 UNIVERSITY OF SZEGED ``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 UNIVERSITY OF SZEGED 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/svg/RenderSVGEllipse.h"
-
-#include "core/svg/SVGCircleElement.h"
-#include "core/svg/SVGEllipseElement.h"
-
-#include <cmath>
-
-namespace blink {
-
-RenderSVGEllipse::RenderSVGEllipse(SVGGraphicsElement* node)
-    : RenderSVGShape(node)
-    , m_usePathFallback(false)
-{
-}
-
-RenderSVGEllipse::~RenderSVGEllipse()
-{
-}
-
-void RenderSVGEllipse::updateShapeFromElement()
-{
-    // Before creating a new object we need to clear the cached bounding box
-    // to avoid using garbage.
-    m_fillBoundingBox = FloatRect();
-    m_strokeBoundingBox = FloatRect();
-    m_center = FloatPoint();
-    m_radii = FloatSize();
-    m_usePathFallback = false;
-
-    calculateRadiiAndCenter();
-
-    // Spec: "A negative value is an error. A value of zero disables rendering of the element."
-    if (m_radii.width() < 0 || m_radii.height() < 0)
-        return;
-
-    if (!m_radii.isEmpty()) {
-        // Fall back to RenderSVGShape and path-based hit detection if the ellipse
-        // has a non-scaling or discontinuous stroke.
-        if (hasNonScalingStroke() || !hasContinuousStroke()) {
-            RenderSVGShape::updateShapeFromElement();
-            m_usePathFallback = true;
-            return;
-        }
-    }
-
-    clearPath();
-
-    m_fillBoundingBox = FloatRect(m_center.x() - m_radii.width(), m_center.y() - m_radii.height(), 2 * m_radii.width(), 2 * m_radii.height());
-    m_strokeBoundingBox = m_fillBoundingBox;
-    if (style()->svgStyle().hasStroke())
-        m_strokeBoundingBox.inflate(strokeWidth() / 2);
-}
-
-void RenderSVGEllipse::calculateRadiiAndCenter()
-{
-    ASSERT(element());
-    if (isSVGCircleElement(*element())) {
-        SVGCircleElement& circle = toSVGCircleElement(*element());
-
-        SVGLengthContext lengthContext(&circle);
-        float radius = circle.r()->currentValue()->value(lengthContext);
-        m_radii = FloatSize(radius, radius);
-        m_center = FloatPoint(circle.cx()->currentValue()->value(lengthContext), circle.cy()->currentValue()->value(lengthContext));
-        return;
-    }
-
-    SVGEllipseElement& ellipse = toSVGEllipseElement(*element());
-
-    SVGLengthContext lengthContext(&ellipse);
-    m_radii = FloatSize(ellipse.rx()->currentValue()->value(lengthContext), ellipse.ry()->currentValue()->value(lengthContext));
-    m_center = FloatPoint(ellipse.cx()->currentValue()->value(lengthContext), ellipse.cy()->currentValue()->value(lengthContext));
-}
-
-bool RenderSVGEllipse::shapeDependentStrokeContains(const FloatPoint& point)
-{
-    // The optimized check below for circles does not support non-scaling or
-    // discontinuous strokes.
-    if (m_usePathFallback
-        || !hasContinuousStroke()
-        || m_radii.width() != m_radii.height()) {
-        if (!hasPath())
-            createPath();
-        return RenderSVGShape::shapeDependentStrokeContains(point);
-    }
-
-    const FloatPoint center = FloatPoint(m_center.x() - point.x(), m_center.y() - point.y());
-    const float halfStrokeWidth = strokeWidth() / 2;
-    const float r = m_radii.width();
-    return std::abs(center.length() - r) <= halfStrokeWidth;
-}
-
-bool RenderSVGEllipse::shapeDependentFillContains(const FloatPoint& point, const WindRule fillRule) const
-{
-    const FloatPoint center = FloatPoint(m_center.x() - point.x(), m_center.y() - point.y());
-
-    // This works by checking if the point satisfies the ellipse equation.
-    // (x/rX)^2 + (y/rY)^2 <= 1
-    const float xrX = center.x() / m_radii.width();
-    const float yrY = center.y() / m_radii.height();
-    return xrX * xrX + yrY * yrY <= 1.0;
-}
-
-bool RenderSVGEllipse::hasContinuousStroke() const
-{
-    const SVGLayoutStyle& svgStyle = style()->svgStyle();
-    return svgStyle.strokeDashArray()->isEmpty();
-}
-
-}