KCanvasRenderingStyle.cpp   [plain text]

/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005 Rob Buis <buis@kde.org>
                        2006 Alexander Kellett <lypanov@kde.org>

    This file is part of the KDE project

    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
    aint with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.
*/

#include "config.h"
#if SVG_SUPPORT

#include "CSSValueList.h"
#include "Document.h"
#include "KCanvasPath.h"
#include "KCanvasRenderingStyle.h"
#include "KRenderingDevice.h"
#include "KRenderingFillPainter.h"
#include "KRenderingPaintServer.h"
#include "KRenderingPaintServerGradient.h"
#include "KRenderingPaintServerSolid.h"
#include "KRenderingStrokePainter.h"
#include "PlatformString.h"
#include "RenderObject.h"
#include "SVGLength.h"
#include "SVGRenderStyle.h"
#include "SVGStyledElement.h"
#include "ksvg.h"
#include "RenderStyle.h"

namespace WebCore {

static KRenderingPaintServerSolid* sharedSolidPaintServer()
{
    static KRenderingPaintServerSolid* _sharedSolidPaintServer = 0;
    if (!_sharedSolidPaintServer)
        _sharedSolidPaintServer = static_cast<KRenderingPaintServerSolid *>(renderingDevice()->createPaintServer(PS_SOLID));
    return _sharedSolidPaintServer;
}

bool KSVGPainterFactory::isFilled(const RenderStyle *style)
{
    SVGPaint *fill = style->svgStyle()->fillPaint();
    if (fill && fill->paintType() == SVG_PAINTTYPE_NONE)
        return false;
    return true;
}

KRenderingPaintServer *KSVGPainterFactory::fillPaintServer(const RenderStyle* style, const RenderObject* item)
{
    if (!isFilled(style))
        return 0;

    SVGPaint *fill = style->svgStyle()->fillPaint();

    KRenderingPaintServer *fillPaintServer;
    if (!fill) {
        // initial value (black)
        fillPaintServer = sharedSolidPaintServer();
        static_cast<KRenderingPaintServerSolid *>(fillPaintServer)->setColor(Color::black);
    } else if (fill->paintType() == SVG_PAINTTYPE_URI) {
        String id(fill->uri());
        fillPaintServer = getPaintServerById(item->document(), AtomicString(id.substring(1)));
        if (item && fillPaintServer && item->isRenderPath())
            fillPaintServer->addClient(static_cast<const RenderPath*>(item));
    } else {
        fillPaintServer = sharedSolidPaintServer();
        KRenderingPaintServerSolid *fillPaintServerSolid = static_cast<KRenderingPaintServerSolid *>(fillPaintServer);
        if (fill->paintType() == SVG_PAINTTYPE_CURRENTCOLOR)
            fillPaintServerSolid->setColor(style->color());
        else
            fillPaintServerSolid->setColor(fill->color());
    }

    return fillPaintServer;
}


bool KSVGPainterFactory::isStroked(const RenderStyle *style)
{
    SVGPaint *stroke = style->svgStyle()->strokePaint();
    if (!stroke || stroke->paintType() == SVG_PAINTTYPE_NONE)
        return false;
    return true;
}

KRenderingPaintServer *KSVGPainterFactory::strokePaintServer(const RenderStyle* style, const RenderObject* item)
{
    if (!isStroked(style))
        return 0;

    SVGPaint *stroke = style->svgStyle()->strokePaint();

    KRenderingPaintServer *strokePaintServer;
    if (stroke && stroke->paintType() == SVG_PAINTTYPE_URI) {
        String id(stroke->uri());
        strokePaintServer = getPaintServerById(item->document(), AtomicString(id.substring(1)));
        if(item && strokePaintServer && item->isRenderPath())
            strokePaintServer->addClient(static_cast<const RenderPath*>(item));
    } else {
        strokePaintServer = sharedSolidPaintServer();
        KRenderingPaintServerSolid *strokePaintServerSolid = static_cast<KRenderingPaintServerSolid *>(strokePaintServer);
        if (stroke->paintType() == SVG_PAINTTYPE_CURRENTCOLOR)
            strokePaintServerSolid->setColor(style->color());
        else
            strokePaintServerSolid->setColor(stroke->color());
    }

    return strokePaintServer;
}

double KSVGPainterFactory::cssPrimitiveToLength(const RenderObject* item, CSSValue *value, double defaultValue)
{
    CSSPrimitiveValue *primitive = static_cast<CSSPrimitiveValue *>(value);

    unsigned short cssType = (primitive ? primitive->primitiveType() : (unsigned short) CSSPrimitiveValue::CSS_UNKNOWN);
    if(!(cssType > CSSPrimitiveValue::CSS_UNKNOWN && cssType <= CSSPrimitiveValue::CSS_PC))
        return defaultValue;

    if(cssType == CSSPrimitiveValue::CSS_PERCENTAGE)
    {
        SVGElement *element = static_cast<SVGElement *>(item->element());
        SVGElement *viewportElement = (element ? element->viewportElement() : 0);
        if(viewportElement)
        {
            double result = primitive->getFloatValue() / 100.0;
            return SVGHelper::PercentageOfViewport(result, viewportElement, LM_OTHER);
        }
    }

    return primitive->computeLengthFloat(const_cast<RenderStyle *>(item->style()));
}

KRenderingStrokePainter KSVGPainterFactory::strokePainter(const RenderStyle* style, const RenderObject* item)
{
    KRenderingStrokePainter strokePainter;

    strokePainter.setOpacity(style->svgStyle()->strokeOpacity());
    strokePainter.setStrokeWidth(KSVGPainterFactory::cssPrimitiveToLength(item, style->svgStyle()->strokeWidth(), 1.0));

    CSSValueList *dashes = style->svgStyle()->strokeDashArray();
    if (dashes) {
        CSSPrimitiveValue *dash = 0;
        KCDashArray array;
        unsigned long len = dashes->length();
        for (unsigned long i = 0; i < len; i++) {
            dash = static_cast<CSSPrimitiveValue *>(dashes->item(i));
            if (dash)
                array.append((float) dash->computeLengthFloat(const_cast<RenderStyle *>(style)));
        }

        strokePainter.setDashArray(array);
        strokePainter.setDashOffset(KSVGPainterFactory::cssPrimitiveToLength(item, style->svgStyle()->strokeDashOffset(), 0.0));
    }

    strokePainter.setStrokeMiterLimit(style->svgStyle()->strokeMiterLimit());
    strokePainter.setStrokeCapStyle((KCCapStyle) style->svgStyle()->capStyle());
    strokePainter.setStrokeJoinStyle((KCJoinStyle) style->svgStyle()->joinStyle());

    return strokePainter;
}

KRenderingFillPainter KSVGPainterFactory::fillPainter(const RenderStyle* style, const RenderObject* item)
{
    KRenderingFillPainter fillPainter;
    
    fillPainter.setFillRule(style->svgStyle()->fillRule() == WR_NONZERO ? RULE_NONZERO : RULE_EVENODD);
    fillPainter.setOpacity(style->svgStyle()->fillOpacity());

    return fillPainter;
}

}

// vim:ts=4:noet
#endif // SVG_SUPPORT