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qsvgstructure.cpp

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtSVG module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qsvgstructure_p.h"
#include "qsvgnode_p.h"
#include "qsvgstyle_p.h"

#include "qpainter.h"
#include "qlocale.h"
#include "qdebug.h"

QSvgG::QSvgG(QSvgNode *parent)
    : QSvgStructureNode(parent)
{

}

QSvgStructureNode::~QSvgStructureNode()
{
    qDeleteAll(m_renderers);
}

void QSvgG::draw(QPainter *p)
{
    QList<QSvgNode*>::iterator itr = m_renderers.begin();
    applyStyle(p);
    
    while (itr != m_renderers.end()) {
        QSvgNode *node = *itr;
        if (node->isVisible())
            node->draw(p);
        ++itr;
    }
    revertStyle(p);
}

QSvgNode::Type QSvgG::type() const
{
    return G;
}

QSvgStructureNode::QSvgStructureNode(QSvgNode *parent)
    :QSvgNode(parent)
{

}

QSvgNode * QSvgStructureNode::scopeNode(const QString &id) const
{
    const QSvgStructureNode *group = this;
    while (group && group->type() != QSvgNode::DOC) {
        group = static_cast<QSvgStructureNode*>(group->parent());
    }
    if (group)
        return group->m_scope[id];
    return 0;
}

void QSvgStructureNode::addChild(QSvgNode *child, const QString &id, bool def)
{
    if (!def)
        m_renderers.append(child);

    if (child->type() == QSvgNode::DEFS) {
        QSvgDefs *defs =
            static_cast<QSvgDefs*>(child);
        m_linkedScopes.append(defs);
    }

    if (id.isEmpty())
        return; //we can't add it to scope without id

    QSvgStructureNode *group = this;
    while (group && group->type() != QSvgNode::DOC) {
        group = static_cast<QSvgStructureNode*>(group->parent());
    }
    if (group)
        group->m_scope.insert(id, child);
}

QSvgDefs::QSvgDefs(QSvgNode *parent)
    : QSvgStructureNode(parent)
{
}

void QSvgDefs::draw(QPainter *)
{
    //noop
}

QSvgNode::Type QSvgDefs::type() const
{
    return DEFS;
}

QSvgStyleProperty * QSvgStructureNode::scopeStyle(const QString &id) const
{
    const QSvgStructureNode *group = this;
    while (group) {
        QSvgStyleProperty *prop = group->styleProperty(id);
        if (prop)
            return prop;
        QList<QSvgStructureNode*>::const_iterator itr = group->m_linkedScopes.constBegin();
        while (itr != group->m_linkedScopes.constEnd()) {
            prop = (*itr)->styleProperty(id);
            if (prop)
                return prop;
            ++itr;
        }
        group = static_cast<QSvgStructureNode*>(group->parent());
    }
    return 0;
}

QHash<QString, bool> QSvgSwitch::m_features;
QHash<QString, bool> QSvgSwitch::m_extensions;

QSvgSwitch::QSvgSwitch(QSvgNode *parent)
    : QSvgStructureNode(parent)
{
    init();
}

void QSvgSwitch::draw(QPainter *p)
{
    QList<QSvgNode*>::iterator itr = m_renderers.begin();
    applyStyle(p);
    while (itr != m_renderers.end()) {
        QSvgNode *node = *itr;
        if (node->isVisible()) {
            const QStringList &features  = node->requiredFeatures();
            const QStringList &extensions = node->requiredExtensions();
            const QStringList &languages = node->requiredLanguages();
            const QStringList &formats = node->requiredFormats();
            const QStringList &fonts = node->requiredFonts();

            bool okToRender = true;
            if (!features.isEmpty()) {
                QStringList::const_iterator sitr = features.constBegin();
                for (; sitr != features.constEnd(); ++sitr) {
                    if (!m_features.contains(*sitr)) {
                        okToRender = false;
                        break;
                    }
                }
            }

            if (okToRender && !extensions.isEmpty()) {
                QStringList::const_iterator sitr = extensions.constBegin();
                for (; sitr != extensions.constEnd(); ++sitr) {
                    if (!m_extensions.contains(*sitr)) {
                        okToRender = false;
                        break;
                    }
                }
            }

            if (okToRender && !languages.isEmpty()) {
                QStringList::const_iterator sitr = languages.constBegin();
                okToRender = false;
                for (; sitr != languages.constEnd(); ++sitr) {
                    if ((*sitr).startsWith(m_systemLanguagePrefix)) {
                        okToRender = true;
                        break;
                    }
                }
            }

            if (okToRender && !formats.isEmpty()) {
                okToRender = false;
            }

            if (okToRender && !fonts.isEmpty()) {
                okToRender = false;
            }

            if (okToRender) {
                node->draw(p);
                break;
            }
        }
        ++itr;
    }
    revertStyle(p);
}

QSvgNode::Type QSvgSwitch::type() const
{
    return SWITCH;
}

void QSvgSwitch::init()
{
    if (m_features.isEmpty()) {
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#SVG"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#SVG-static"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#CoreAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Structure"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#ConditionalProcessing"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#ConditionalProcessingAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Image"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Prefetch"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Shape"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Text"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#PaintAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#OpacityAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#GraphicsAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Gradient"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#SolidColor"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#XlinkAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#ExternalResourcesRequiredAttribute"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Font"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Hyperlinking"), true);
        m_features.insert(QLatin1String("http://www.w3.org/Graphics/SVG/feature/1.2/#Extensibility"), true);
    }

    QLocale locale;
    m_systemLanguage = locale.name().replace(QLatin1Char('_'), QLatin1Char('-'));
    int idx = m_systemLanguage.indexOf(QLatin1Char('-'));
    m_systemLanguagePrefix = m_systemLanguage.mid(0, idx);
}

QRectF QSvgStructureNode::bounds() const
{   
    if (m_bounds.isEmpty()) {
        foreach(QSvgNode *node, m_renderers) {
            m_bounds |= node->bounds();
        }
    }

    return m_bounds;
}

QRectF QSvgStructureNode::transformedBounds(const QMatrix &mat) const
{
    QMatrix m = mat;
    QSvgTransformStyle *trans = m_style.transform;
    if (trans) {
        m = trans->qmatrix() * m;
    }
    
    QRectF bounds;
    foreach(QSvgNode *node, m_renderers) {
        bounds |= node->transformedBounds(m);
    }
    
    return bounds;
}

QSvgNode * QSvgStructureNode::previousSiblingNode(QSvgNode *n) const
{
    QSvgNode *prev = 0;
    QList<QSvgNode*>::const_iterator itr = m_renderers.constBegin();
    while (itr != m_renderers.constEnd()) {
        QSvgNode *node = *itr;
        if (node == n)
            return prev;
        prev = node;
    }
    return prev;
}

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