315 lines
8.3 KiB
C++
315 lines
8.3 KiB
C++
/*
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* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "svg.h"
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#include <QDir>
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#include <QMatrix>
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#include <QPainter>
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#include <QPixmapCache>
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#include <QSharedData>
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#include <KDebug>
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#include <KSharedPtr>
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#include <KSvgRenderer>
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#include "theme.h"
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namespace Plasma
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{
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class SharedSvgRenderer : public KSvgRenderer, public QSharedData
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{
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public:
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typedef KSharedPtr<SharedSvgRenderer> Ptr;
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SharedSvgRenderer(QObject *parent = 0)
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: KSvgRenderer(parent)
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{}
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SharedSvgRenderer(const QString &filename, QObject *parent = 0)
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: KSvgRenderer(filename, parent)
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{}
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SharedSvgRenderer(const QByteArray &contents, QObject *parent = 0)
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: KSvgRenderer(contents, parent)
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{}
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~SharedSvgRenderer()
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{
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//kDebug() << "leaving this world for a better one.";
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}
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};
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class Svg::Private
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{
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public:
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Private(const QString& imagePath)
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: renderer(0),
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contentType(Svg::SingleImage)
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{
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if (QDir::isAbsolutePath(imagePath)) {
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path = imagePath;
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themed = false;
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if (!QFile::exists(path)) {
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kDebug() << "Plasma::Svg: file '" << path << "' does not exist!";
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}
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} else {
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themePath = imagePath;
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themed = true;
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}
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}
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~Private()
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{
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if (renderer.count() == 2) {
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// this and the cache reference it; and boy is this not thread safe ;)
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renderers.erase(renderers.find(themePath));
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}
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renderer = 0;
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}
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void removeFromCache()
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{
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if ( id.isEmpty() ) {
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return;
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}
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QPixmapCache::remove( id );
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id.clear();
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}
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void findInCache(QPixmap& p, const QString& elementId)
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{
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createRenderer();
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id = QString::fromLatin1("%3_%2_%1")
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.arg(size.width())
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.arg(size.height())
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.arg(path);
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if (!elementId.isEmpty()) {
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id.append(elementId);
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}
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//kDebug() << "id is " << id;
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if (QPixmapCache::find(id, p)) {
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//kDebug() << "found cached version of " << id;
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return;
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} else {
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//kDebug() << "didn't find cached version of " << id << ", so re-rendering";
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}
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// we have to re-render this puppy
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QSize s;
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if (elementId.isEmpty() || contentType == Svg::ImageSet) {
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s = size.toSize();
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} else {
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s = elementSize(elementId);
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}
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//kDebug() << "size for " << elementId << " is " << s;
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p = QPixmap(s);
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p.fill(Qt::transparent);
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QPainter renderPainter(&p);
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if (elementId.isEmpty()) {
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renderer->render(&renderPainter);
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} else {
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renderer->render(&renderPainter, elementId);
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}
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renderPainter.end();
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bool inserted = QPixmapCache::insert( id, p );
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if (!inserted)
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kDebug() << "pixmap cache is too small for inserting" << id << "of size" << s;
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}
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void createRenderer()
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{
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if (renderer) {
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return;
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}
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if (themed && path.isNull()) {
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path = Plasma::Theme::self()->image(themePath);
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}
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QHash<QString, SharedSvgRenderer::Ptr>::const_iterator it = renderers.find(path);
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if (it != renderers.end()) {
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//kDebug() << "gots us an existing one!";
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renderer = it.value();
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} else {
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renderer = new SharedSvgRenderer(path);
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renderers[path] = renderer;
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}
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size = renderer->defaultSize();
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}
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QSize elementSize(const QString& elementId)
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{
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createRenderer();
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QSizeF elementSize = renderer->boundsOnElement(elementId).size();
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QSizeF naturalSize = renderer->defaultSize();
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qreal dx = size.width() / naturalSize.width();
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qreal dy = size.height() / naturalSize.height();
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elementSize.scale(elementSize.width() * dx, elementSize.height() * dy, Qt::IgnoreAspectRatio);
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return elementSize.toSize();
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}
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QRect elementRect(const QString& elementId)
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{
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createRenderer();
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QRectF elementRect = renderer->boundsOnElement(elementId);
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QSizeF naturalSize = renderer->defaultSize();
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qreal dx = size.width() / naturalSize.width();
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qreal dy = size.height() / naturalSize.height();
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return QRect(elementRect.x() * dx, elementRect.y() * dy,
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elementRect.width() * dx, elementRect.height() * dy);
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}
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QMatrix matrixForElement(const QString& elementId)
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{
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createRenderer();
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return renderer->matrixForElement(elementId);
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}
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static QHash<QString, SharedSvgRenderer::Ptr> renderers;
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SharedSvgRenderer::Ptr renderer;
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QString themePath;
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QString path;
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QString id;
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QSizeF size;
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bool themed;
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Svg::ContentType contentType;
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};
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QHash<QString, SharedSvgRenderer::Ptr> Svg::Private:: renderers;
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Svg::Svg(const QString& imagePath, QObject* parent)
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: QObject(parent),
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d(new Private(imagePath))
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{
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if (d->themed) {
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connect(Plasma::Theme::self(), SIGNAL(changed()), this, SLOT(themeChanged()));
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}
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}
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Svg::~Svg()
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{
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delete d;
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}
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void Svg::paint(QPainter* painter, const QPointF& point, const QString& elementID)
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{
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QPixmap pix;
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d->findInCache(pix, elementID);
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//kDebug() << "pix size is " << pix.size();
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painter->drawPixmap(QRectF(point, pix.size()), pix, QRectF(QPointF(0,0), pix.size()));
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}
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void Svg::paint(QPainter* painter, int x, int y, const QString& elementID)
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{
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paint(painter, QPointF(x, y), elementID);
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}
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void Svg::paint(QPainter* painter, const QRectF& rect, const QString& elementID)
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{
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QPixmap pix;
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d->findInCache(pix, elementID);
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//kDebug() << "pix size is " << pix.size();
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painter->drawPixmap(rect, pix, QRectF(QPointF(0,0), pix.size()));
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}
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void Svg::resize( int width, int height )
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{
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resize( QSize( width, height ) );
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}
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void Svg::resize( const QSizeF& size )
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{
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d->createRenderer();
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d->size = size;
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}
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void Svg::resize()
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{
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d->createRenderer();
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}
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QSize Svg::elementSize(const QString& elementId) const
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{
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return d->elementSize(elementId);
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}
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QRect Svg::elementRect(const QString& elementId) const
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{
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return d->elementRect(elementId);
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}
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bool Svg::elementExists(const QString& elementId) const
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{
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d->createRenderer();
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return d->renderer->elementExists(elementId);
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}
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QMatrix Svg::matrixForElement(const QString& elementId) const
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{
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d->createRenderer();
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return d->renderer->matrixForElement(elementId);
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}
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bool Svg::isValid() const
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{
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d->createRenderer();
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return d->renderer->isValid();
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}
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QSize Svg::size() const
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{
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return d->size.toSize();
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}
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void Svg::setContentType(ContentType contentType)
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{
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d->contentType = contentType;
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}
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Svg::ContentType Svg::contentType()
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{
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return d->contentType;
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}
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void Svg::themeChanged()
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{
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d->removeFromCache();
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d->path.clear();
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//delete d->renderer; we're a KSharedPtr
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d->renderer = 0;
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emit repaintNeeded();
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}
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} // Plasma namespace
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#include "svg.moc"
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