| /* |
| * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org> |
| * Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2009 Google, Inc. |
| * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com> |
| * Copyright (C) 2011 Renata Hodovan <reni@webkit.org> |
| * Copyright (C) 2011 University of Szeged |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "core/layout/svg/LayoutSVGPath.h" |
| |
| #include "core/layout/svg/LayoutSVGResourceMarker.h" |
| #include "core/layout/svg/SVGResources.h" |
| #include "core/layout/svg/SVGResourcesCache.h" |
| #include "core/svg/SVGGeometryElement.h" |
| #include "wtf/MathExtras.h" |
| |
| namespace blink { |
| |
| LayoutSVGPath::LayoutSVGPath(SVGGeometryElement* node) |
| : LayoutSVGShape(node) |
| { |
| } |
| |
| LayoutSVGPath::~LayoutSVGPath() |
| { |
| } |
| |
| |
| void LayoutSVGPath::updateShapeFromElement() |
| { |
| LayoutSVGShape::updateShapeFromElement(); |
| processMarkerPositions(); |
| |
| m_strokeBoundingBox = calculateUpdatedStrokeBoundingBox(); |
| if (element()) |
| element()->setNeedsResizeObserverUpdate(); |
| } |
| |
| FloatRect LayoutSVGPath::hitTestStrokeBoundingBox() const |
| { |
| const SVGComputedStyle& svgStyle = style()->svgStyle(); |
| if (svgStyle.hasStroke()) |
| return m_strokeBoundingBox; |
| |
| // Implementation of http://dev.w3.org/fxtf/css-masking-1/#compute-stroke-bounding-box |
| // except that we ignore whether the stroke is none. |
| |
| FloatRect box = m_fillBoundingBox; |
| |
| const float strokeWidth = this->strokeWidth(); |
| if (strokeWidth <= 0) |
| return box; |
| |
| float delta = strokeWidth / 2; |
| |
| if (svgStyle.hasMiterJoinStyle()) { |
| const float miter = svgStyle.strokeMiterLimit(); |
| if (miter < M_SQRT2 && svgStyle.hasSquareCapStyle()) |
| delta *= M_SQRT2; |
| else |
| delta *= miter; |
| } else if (svgStyle.hasSquareCapStyle()) { |
| delta *= M_SQRT2; |
| } |
| |
| box.inflate(delta); |
| return box; |
| } |
| |
| FloatRect LayoutSVGPath::calculateUpdatedStrokeBoundingBox() const |
| { |
| FloatRect strokeBoundingBox = m_strokeBoundingBox; |
| if (!m_markerPositions.isEmpty()) |
| strokeBoundingBox.unite(markerRect(strokeWidth())); |
| return strokeBoundingBox; |
| } |
| |
| FloatRect LayoutSVGPath::markerRect(float strokeWidth) const |
| { |
| ASSERT(!m_markerPositions.isEmpty()); |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this); |
| ASSERT(resources); |
| |
| LayoutSVGResourceMarker* markerStart = resources->markerStart(); |
| LayoutSVGResourceMarker* markerMid = resources->markerMid(); |
| LayoutSVGResourceMarker* markerEnd = resources->markerEnd(); |
| ASSERT(markerStart || markerMid || markerEnd); |
| |
| FloatRect boundaries; |
| unsigned size = m_markerPositions.size(); |
| for (unsigned i = 0; i < size; ++i) { |
| if (LayoutSVGResourceMarker* marker = SVGMarkerData::markerForType(m_markerPositions[i].type, markerStart, markerMid, markerEnd)) |
| boundaries.unite(marker->markerBoundaries(marker->markerTransformation(m_markerPositions[i].origin, m_markerPositions[i].angle, strokeWidth))); |
| } |
| return boundaries; |
| } |
| |
| bool LayoutSVGPath::shouldGenerateMarkerPositions() const |
| { |
| if (!style()->svgStyle().hasMarkers()) |
| return false; |
| |
| if (!SVGResources::supportsMarkers(*toSVGGraphicsElement(element()))) |
| return false; |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this); |
| if (!resources) |
| return false; |
| |
| return resources->markerStart() || resources->markerMid() || resources->markerEnd(); |
| } |
| |
| void LayoutSVGPath::processMarkerPositions() |
| { |
| m_markerPositions.clear(); |
| |
| if (!shouldGenerateMarkerPositions()) |
| return; |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this); |
| ASSERT(resources); |
| |
| LayoutSVGResourceMarker* markerStart = resources->markerStart(); |
| |
| SVGMarkerData markerData(m_markerPositions, markerStart ? markerStart->orientType() == SVGMarkerOrientAutoStartReverse : false); |
| path().apply(&markerData, SVGMarkerData::updateFromPathElement); |
| markerData.pathIsDone(); |
| } |
| |
| } // namespace blink |