plasma-framework/private/svg_p.h

/*
 *   Copyright 2006-2010 Aaron Seigo <aseigo@kde.org>
 *
 *   This program 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, or
 *   (at your option) any later version.
 *
 *   This program 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 General Public License for more details
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef PLASMA_SVG_P_H
#define PLASMA_SVG_P_H

#include <QHash>
#include <QSharedData>
#include <QSvgRenderer>

#include "ksharedptr.h"

namespace Plasma
{

class Svg;

class SharedSvgRenderer : public QSvgRenderer, public QSharedData
{
    public:
        typedef KSharedPtr<SharedSvgRenderer> Ptr;

        SharedSvgRenderer(QObject *parent = 0);
        SharedSvgRenderer(
            const QString &filename,
            const QString &styleSheet,
            QHash<QString, QRectF> &interestingElements,
            QObject *parent = 0);

        SharedSvgRenderer(
            const QByteArray &contents,
            const QString &styleSheet,
            QHash<QString, QRectF> &interestingElements,
            QObject *parent = 0);

    private:
        bool load(
            const QByteArray &contents,
            const QString &styleSheet,
            QHash<QString, QRectF> &interestingElements);
};

class SvgPrivate
{
public:
    SvgPrivate(Svg *svg);
    ~SvgPrivate();

    //This function is meant for the rects cache
    QString cacheId(const QString &elementId);

    //This function is meant for the pixmap cache
    QString cachePath(const QString &path, const QSize &size);

    bool setImagePath(const QString &imagePath);

    Theme *actualTheme();
    Theme *cacheAndColorsTheme();

    QPixmap findInCache(const QString &elementId, const QSizeF &s = QSizeF());

    void createRenderer();
    void eraseRenderer();

    QRectF elementRect(const QString &elementId);
    QRectF findAndCacheElementRect(const QString &elementId);
    QMatrix matrixForElement(const QString &elementId);

    void checkColorHints();

    //Folowing two are utility functions to snap rendered elements to the pixel grid
    //to and from are always 0 <= val <= 1
    qreal closestDistance(qreal to, qreal from);

    QRectF makeUniform(const QRectF &orig, const QRectF &dst);

    //Slots
    void themeChanged();
    void colorsChanged();

    static QHash<QString, SharedSvgRenderer::Ptr> s_renderers;
    static QWeakPointer<Theme> s_systemColorsCache;

    Svg *q;
    QWeakPointer<Theme> theme;
    QHash<QString, QRectF> localRectCache;
    QHash<QString, QSize> elementsWithSizeHints;
    SharedSvgRenderer::Ptr renderer;
    QString themePath;
    QString path;
    QSizeF size;
    QSizeF naturalSize;
    QChar styleCrc;
    unsigned int lastModified;
    bool multipleImages : 1;
    bool themed : 1;
    bool applyColors : 1;
    bool usesColors : 1;
    bool cacheRendering : 1;
    bool themeFailed : 1;
};

}

#endif