/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005 Rob Buis <buis@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 "KCanvasResources.h"

#include "Document.h"
#include "GraphicsContext.h"
#include "IntRect.h"
#include "KCanvasContainer.h"
#include "KCanvasImage.h"
#include "KCanvasMatrix.h"
#include "KCanvasTreeDebug.h"
#include "KRenderingDevice.h"
#include "RenderPath.h"
#include "SVGStyledElement.h"
#include <kcanvas/KCanvas.h>
#include <qtextstream.h>

namespace WebCore {

QTextStream &operator<<(QTextStream &ts, const WebCore::KCanvasResource &r) 
{ 
    return r.externalRepresentation(ts); 
}

// KCanvasResource
KCanvasResource::KCanvasResource()
{
}

KCanvasResource::~KCanvasResource()
{
}

void KCanvasResource::addClient(const RenderPath *item)
{
    if(m_clients.find(item) != m_clients.end())
        return;

    m_clients.append(item);
}

const KCanvasItemList &KCanvasResource::clients() const
{
    return m_clients;
}

void KCanvasResource::invalidate()
{
    KCanvasItemList::ConstIterator it = m_clients.begin();
    KCanvasItemList::ConstIterator end = m_clients.end();

    for(; it != end; ++it)
        const_cast<RenderPath *>(*it)->repaint();
}

DeprecatedString KCanvasResource::idInRegistry() const
{
    return registryId;
}

void KCanvasResource::setIdInRegistry(const DeprecatedString& newId)
{
    registryId = newId;
} 

QTextStream& KCanvasResource::externalRepresentation(QTextStream &ts) const
{
    return ts;
}

// KCanvasClipper
KCanvasClipper::KCanvasClipper() : KCanvasResource()
{
}

KCanvasClipper::~KCanvasClipper()
{
}

void KCanvasClipper::resetClipData()
{
    m_clipData.clear();
}

void KCanvasClipper::addClipData(KCanvasPath* path, KCWindRule rule, bool bboxUnits)
{
    m_clipData.addPath(path, rule, bboxUnits);
}

KCClipDataList KCanvasClipper::clipData() const
{
    return m_clipData;
}

QTextStream& KCanvasClipper::externalRepresentation(QTextStream &ts) const
{
    ts << "[type=CLIPPER]";
    ts << " [clip data=" << clipData() << "]";
    return ts;
}

// KCanvasMasker
KCanvasMasker::KCanvasMasker() : KCanvasResource(), m_mask(0)
{
}

KCanvasMasker::~KCanvasMasker()
{
    delete m_mask;
}

void KCanvasMasker::setMask(KCanvasImage *mask)
{
    if (m_mask != mask) {
        delete m_mask;
        m_mask = mask;
    }
}

QTextStream& KCanvasMasker::externalRepresentation(QTextStream &ts) const
{
    ts << "[type=MASKER]";
    return ts;
}

// KCanvasMarker
KCanvasMarker::KCanvasMarker(RenderObject *marker) : KCanvasResource()
{
    m_refX = 0;
    m_refY = 0;
    m_marker = marker;
    setAutoAngle();
    m_useStrokeWidth = true;
}

KCanvasMarker::~KCanvasMarker()
{
}

void KCanvasMarker::setMarker(RenderObject *marker)
{
    m_marker = marker;
}

void KCanvasMarker::setRef(double refX, double refY)
{
    m_refX = refX;
    m_refY = refY;
}

double KCanvasMarker::refX() const
{
    return m_refX;
}

double KCanvasMarker::refY() const
{
    return m_refY;
}

void KCanvasMarker::setAngle(float angle)
{
    m_angle = angle;
}

float KCanvasMarker::angle() const
{
    return m_angle;
}

void KCanvasMarker::setAutoAngle()
{
    m_angle = -1;
}

void KCanvasMarker::setUseStrokeWidth(bool useStrokeWidth)
{
    m_useStrokeWidth = useStrokeWidth;
}

bool KCanvasMarker::useStrokeWidth() const
{
    return m_useStrokeWidth;
}

void KCanvasMarker::setScale(float scaleX, float scaleY)
{
    m_scaleX = scaleX;
    m_scaleY = scaleY;
}

float KCanvasMarker::scaleX() const
{
    return m_scaleX;
}

float KCanvasMarker::scaleY() const
{
    return m_scaleY;
}

void KCanvasMarker::draw(const FloatRect &rect, double x, double y, double strokeWidth, double angle)
{
    if(m_marker)
    {
        KCanvasMatrix translation;
        translation.translate(x, y);

        KCanvasMatrix rotation;
        rotation.setOperationMode(OPS_POSTMUL);
        rotation.translate(-m_refX, -m_refY);
        rotation.scale(m_scaleX, m_scaleY);
        rotation.rotate(m_angle > -1 ? m_angle : angle);
        
        // stroke width
        if(m_useStrokeWidth)
            rotation.scale(strokeWidth, strokeWidth);

        // FIXME: PaintInfo should be passed into this method instead.
        // FIXME: bounding box fractions lost
        GraphicsContext p;
        RenderObject::PaintInfo info(&p, enclosingIntRect(rect), PaintActionForeground, 0);
        m_marker->setLocalTransform(rotation.multiply(translation).qmatrix());
        static_cast<KCanvasContainer *>(m_marker)->setDrawsContents(true);
        m_marker->paint(info, 0, 0);
        static_cast<KCanvasContainer *>(m_marker)->setDrawsContents(false);
    }
}

QTextStream& KCanvasMarker::externalRepresentation(QTextStream &ts) const
{
    ts << "[type=MARKER]"
       << " [angle=";
    if (angle() == -1) 
        ts << "auto" << "]";
    else 
        ts << angle() << "]";        
    ts << " [ref x=" << refX() << " y=" << refY() << "]";
    return ts;
}

KCanvasResource *getResourceById(Document *document, const AtomicString &id)
{
    if (id.isEmpty())
        return 0;
    Element *element = document->getElementById(id);
    SVGElement *svgElement = svg_dynamic_cast(element);
    if (svgElement && svgElement->isStyled())
        return static_cast<SVGStyledElement *>(svgElement)->canvasResource();
    else
        fprintf(stderr, "Failed to find resource with id: %s\n", id.deprecatedString().ascii());
    return 0;
}

KCanvasMarker *getMarkerById(Document *document, const AtomicString &id)
{
    KCanvasResource *resource = getResourceById(document, id);
    if (resource && resource->isMarker())
        return static_cast<KCanvasMarker *>(resource);
    return 0;
}

KCanvasClipper *getClipperById(Document *document, const AtomicString &id)
{
    KCanvasResource *resource = getResourceById(document, id);
    if (resource && resource->isClipper())
        return static_cast<KCanvasClipper *>(resource);
    return 0;
}

KCanvasMasker *getMaskerById(Document *document, const AtomicString &id)
{
    KCanvasResource *resource = getResourceById(document, id);
    if (resource && resource->isMasker())
        return static_cast<KCanvasMasker *>(resource);
    return 0;
}

KRenderingPaintServer *getPaintServerById(Document *document, const AtomicString &id)
{
    KCanvasResource *resource = getResourceById(document, id);
    if (resource && resource->isPaintServer())
        return static_cast<KRenderingPaintServer *>(resource);
    return 0;
}

}

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