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/*
* Copyright (C) Research In Motion Limited 2010, 2012. All rights reserved.
*
* 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 "config.h"
#include "core/svg/SVGPathUtilities.h"
#include "core/svg/SVGPathBlender.h"
#include "core/svg/SVGPathBuilder.h"
#include "core/svg/SVGPathByteStreamBuilder.h"
#include "core/svg/SVGPathByteStreamSource.h"
#include "core/svg/SVGPathParser.h"
#include "core/svg/SVGPathSegListBuilder.h"
#include "core/svg/SVGPathSegListSource.h"
#include "core/svg/SVGPathStringBuilder.h"
#include "core/svg/SVGPathStringSource.h"
#include "core/svg/SVGPathTraversalStateBuilder.h"
#include "platform/graphics/PathTraversalState.h"
namespace WebCore {
static SVGPathBuilder* globalSVGPathBuilder(Path& result)
{
static SVGPathBuilder* s_builder = 0;
if (!s_builder)
s_builder = new SVGPathBuilder;
s_builder->setCurrentPath(&result);
return s_builder;
}
static SVGPathByteStreamBuilder* globalSVGPathByteStreamBuilder(SVGPathByteStream* result)
{
static SVGPathByteStreamBuilder* s_builder = 0;
if (!s_builder)
s_builder = new SVGPathByteStreamBuilder;
s_builder->setCurrentByteStream(result);
return s_builder;
}
static SVGPathStringBuilder* globalSVGPathStringBuilder()
{
static SVGPathStringBuilder* s_builder = 0;
if (!s_builder)
s_builder = new SVGPathStringBuilder;
return s_builder;
}
static SVGPathTraversalStateBuilder* globalSVGPathTraversalStateBuilder(PathTraversalState& traversalState, float length)
{
static SVGPathTraversalStateBuilder* s_builder = 0;
if (!s_builder)
s_builder = new SVGPathTraversalStateBuilder;
s_builder->setCurrentTraversalState(&traversalState);
s_builder->setDesiredLength(length);
return s_builder;
}
static SVGPathParser* globalSVGPathParser(SVGPathSource* source, SVGPathConsumer* consumer)
{
static SVGPathParser* s_parser = 0;
if (!s_parser)
s_parser = new SVGPathParser;
s_parser->setCurrentSource(source);
s_parser->setCurrentConsumer(consumer);
return s_parser;
}
static SVGPathBlender* globalSVGPathBlender()
{
static SVGPathBlender* s_blender = 0;
if (!s_blender)
s_blender = new SVGPathBlender;
return s_blender;
}
bool buildPathFromString(const String& d, Path& result)
{
if (d.isEmpty())
return false;
SVGPathBuilder* builder = globalSVGPathBuilder(result);
OwnPtr<SVGPathStringSource> source = SVGPathStringSource::create(d);
SVGPathParser* parser = globalSVGPathParser(source.get(), builder);
bool ok = parser->parsePathDataFromSource(NormalizedParsing);
parser->cleanup();
return ok;
}
bool buildPathFromByteStream(const SVGPathByteStream* stream, Path& result)
{
ASSERT(stream);
if (stream->isEmpty())
return false;
SVGPathBuilder* builder = globalSVGPathBuilder(result);
SVGPathByteStreamSource source(stream);
SVGPathParser* parser = globalSVGPathParser(&source, builder);
bool ok = parser->parsePathDataFromSource(NormalizedParsing);
parser->cleanup();
return ok;
}
bool buildStringFromByteStream(const SVGPathByteStream* stream, String& result, PathParsingMode parsingMode)
{
ASSERT(stream);
if (stream->isEmpty())
return false;
SVGPathStringBuilder* builder = globalSVGPathStringBuilder();
SVGPathByteStreamSource source(stream);
SVGPathParser* parser = globalSVGPathParser(&source, builder);
bool ok = parser->parsePathDataFromSource(parsingMode);
result = builder->result();
parser->cleanup();
return ok;
}
bool buildSVGPathByteStreamFromString(const String& d, SVGPathByteStream* result, PathParsingMode parsingMode)
{
ASSERT(result);
result->clear();
if (d.isEmpty())
return false;
// The string length is typically a minor overestimate of eventual byte stream size, so it avoids us a lot of reallocs.
result->reserveInitialCapacity(d.length());
SVGPathByteStreamBuilder* builder = globalSVGPathByteStreamBuilder(result);
OwnPtr<SVGPathStringSource> source = SVGPathStringSource::create(d);
SVGPathParser* parser = globalSVGPathParser(source.get(), builder);
bool ok = parser->parsePathDataFromSource(parsingMode);
parser->cleanup();
result->shrinkToFit();
return ok;
}
bool addToSVGPathByteStream(SVGPathByteStream* fromStream, const SVGPathByteStream* byStream, unsigned repeatCount)
{
ASSERT(fromStream);
ASSERT(byStream);
if (fromStream->isEmpty() || byStream->isEmpty())
return false;
SVGPathByteStreamBuilder* builder = globalSVGPathByteStreamBuilder(fromStream);
OwnPtr<SVGPathByteStream> fromStreamCopy = fromStream->copy();
fromStream->clear();
SVGPathByteStreamSource fromSource(fromStreamCopy.get());
SVGPathByteStreamSource bySource(byStream);
SVGPathBlender* blender = globalSVGPathBlender();
bool ok = blender->addAnimatedPath(&fromSource, &bySource, builder, repeatCount);
blender->cleanup();
return ok;
}
bool getSVGPathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream* stream, float length, unsigned& pathSeg)
{
ASSERT(stream);
if (stream->isEmpty())
return false;
PathTraversalState traversalState(PathTraversalState::TraversalSegmentAtLength);
SVGPathTraversalStateBuilder* builder = globalSVGPathTraversalStateBuilder(traversalState, length);
SVGPathByteStreamSource source(stream);
SVGPathParser* parser = globalSVGPathParser(&source, builder);
bool ok = parser->parsePathDataFromSource(NormalizedParsing);
pathSeg = builder->pathSegmentIndex();
parser->cleanup();
return ok;
}
bool getTotalLengthOfSVGPathByteStream(const SVGPathByteStream* stream, float& totalLength)
{
ASSERT(stream);
if (stream->isEmpty())
return false;
PathTraversalState traversalState(PathTraversalState::TraversalTotalLength);
SVGPathTraversalStateBuilder* builder = globalSVGPathTraversalStateBuilder(traversalState, 0);
SVGPathByteStreamSource source(stream);
SVGPathParser* parser = globalSVGPathParser(&source, builder);
bool ok = parser->parsePathDataFromSource(NormalizedParsing);
totalLength = builder->totalLength();
parser->cleanup();
return ok;
}
bool getPointAtLengthOfSVGPathByteStream(const SVGPathByteStream* stream, float length, FloatPoint& point)
{
ASSERT(stream);
if (stream->isEmpty())
return false;
PathTraversalState traversalState(PathTraversalState::TraversalPointAtLength);
SVGPathTraversalStateBuilder* builder = globalSVGPathTraversalStateBuilder(traversalState, length);
SVGPathByteStreamSource source(stream);
SVGPathParser* parser = globalSVGPathParser(&source, builder);
bool ok = parser->parsePathDataFromSource(NormalizedParsing);
point = builder->currentPoint();
parser->cleanup();
return ok;
}
}
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