563 lines
16 KiB
C++
563 lines
16 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 <QSharedData>
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#include <QTimer>
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#include <kcolorscheme.h>
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#include <kconfiggroup.h>
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#include <kdebug.h>
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#include <kiconeffect.h>
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#include <kglobalsettings.h>
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#include <ksharedptr.h>
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#include <ksvgrenderer.h>
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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 SvgPrivate
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{
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public:
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SvgPrivate(Svg *svg)
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: q(svg),
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saveTimer(0),
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renderer(0),
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multipleImages(false),
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themed(false),
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applyColors(false)
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{
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}
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~SvgPrivate()
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{
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eraseRenderer();
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}
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//This function is meant for the rects cache
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QString cacheId(const QString &elementId)
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{
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if (size.isValid() && size != naturalSize) {
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return QString("%3_%2_%1").arg(int(size.height()))
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.arg(int(size.width()))
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.arg(elementId);
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} else {
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return QString("%2_%1").arg("Natural")
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.arg(elementId);
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}
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}
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//This function is meant for the pixmap cache
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QString cachePath(const QString &path, const QSize &size)
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{
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return QString("%3_%2_%1_").arg(int(size.height()))
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.arg(int(size.width()))
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.arg(path);
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}
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bool setImagePath(const QString &imagePath, Svg *q)
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{
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bool isThemed = !QDir::isAbsolutePath(imagePath);
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// lets check to see if we're already set to this file
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if (isThemed == themed &&
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((themed && themePath == imagePath) ||
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(!themed && path == imagePath))) {
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return false;
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}
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// if we don't have any path right now and are going to set one,
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// then lets not schedule a repaint because we are just initializing!
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bool updateNeeded = true; //!path.isEmpty() || !themePath.isEmpty();
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if (themed) {
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QObject::disconnect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()),
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q, SLOT(themeChanged()));
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QObject::disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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themed = isThemed;
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path.clear();
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themePath.clear();
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if (themed) {
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themePath = imagePath;
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QObject::connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()),
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q, SLOT(themeChanged()));
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// check if svg wants colorscheme applied
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checkApplyColorHint();
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if (applyColors && !Theme::defaultTheme()->colorScheme()) {
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QObject::connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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} else if (QFile::exists(imagePath)) {
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path = imagePath;
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} else {
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kDebug() << "file '" << path << "' does not exist!";
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}
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return updateNeeded;
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}
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QPixmap findInCache(const QString &elementId, const QSizeF &s = QSizeF())
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{
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QSize size;
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if (elementId.isEmpty() || (multipleImages && s.isValid())) {
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size = s.toSize();
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} else {
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size = elementRect(elementId).size().toSize();
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}
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if (size.isEmpty()) {
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return QPixmap();
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}
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QString id = cachePath(path, size);
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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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Theme *theme = Theme::defaultTheme();
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QPixmap p;
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if (theme->findInCache(id, p)) {
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//kDebug() << "found cached version of " << id << p.size();
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return p;
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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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//kDebug() << "size for " << elementId << " is " << s;
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// we have to re-render this puppy
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p = QPixmap(size);
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p.fill(Qt::transparent);
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QPainter renderPainter(&p);
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createRenderer();
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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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// Apply current color scheme if the svg asks for it
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if (applyColors) {
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QImage itmp = p.toImage();
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KIconEffect::colorize(itmp, theme->color(Theme::BackgroundColor), 1.0);
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p = p.fromImage(itmp);
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}
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if (!itemsToSave.contains(id)) {
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itemsToSave.insert(id, p);
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saveTimer->start(300);
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}
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return p;
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}
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void scheduledCacheUpdate()
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{
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QHash<QString, QPixmap>::const_iterator i = itemsToSave.constBegin();
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while (i != itemsToSave.constEnd()) {
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//kDebug()<<"Saving item to cache: "<<i.key();
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Theme::defaultTheme()->insertIntoCache(i.key(), i.value());
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++i;
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}
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itemsToSave.clear();
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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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//kDebug() << kBacktrace();
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if (themed && path.isEmpty()) {
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path = Plasma::Theme::defaultTheme()->imagePath(themePath);
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}
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//kDebug() << "********************************";
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//kDebug() << "FAIL! **************************";
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//kDebug() << path << "**";
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QHash<QString, SharedSvgRenderer::Ptr>::const_iterator it = s_renderers.find(path);
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if (it != s_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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s_renderers[path] = renderer;
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}
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if (size == QSizeF()) {
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size = renderer->defaultSize();
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}
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}
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void eraseRenderer()
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{
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if (renderer && renderer.count() == 2) {
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// this and the cache reference it; and boy is this not thread safe ;)
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s_renderers.erase(s_renderers.find(path));
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}
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renderer = 0;
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localRectCache.clear();
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}
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QRectF elementRect(const QString &elementId)
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{
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if (themed && path.isEmpty()) {
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path = Plasma::Theme::defaultTheme()->imagePath(themePath);
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}
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QString id = cacheId(elementId);
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if (localRectCache.contains(id)) {
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return localRectCache.value(id);
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}
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QRectF rect;
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bool found = Theme::defaultTheme()->findInRectsCache(path, id, rect);
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if (found) {
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localRectCache.insert(id, rect);
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return rect;
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}
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return findAndCacheElementRect(elementId);
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}
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QRectF findAndCacheElementRect(const QString &elementId)
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{
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createRenderer();
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QRectF elementRect = renderer->elementExists(elementId) ?
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renderer->boundsOnElement(elementId) : QRectF();
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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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elementRect = QRectF(elementRect.x() * dx, elementRect.y() * dy,
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elementRect.width() * dx, elementRect.height() * dy);
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Theme::defaultTheme()->insertIntoRectsCache(path, cacheId(elementId), elementRect);
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return elementRect;
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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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void checkApplyColorHint()
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{
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QRectF elementRect;
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bool found = Theme::defaultTheme()->findInRectsCache(themePath, cacheId("hint-apply-color-scheme"), elementRect);
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if (found) {
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applyColors = elementRect.isValid();
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} else {
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findAndCacheElementRect("hint-apply-color-scheme");
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applyColors = renderer->elementExists("hint-apply-color-scheme");
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}
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}
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void themeChanged()
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{
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if (!themed) {
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return;
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}
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QString newPath = Theme::defaultTheme()->imagePath(themePath);
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if (path == newPath) {
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return;
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}
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path = newPath;
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//delete d->renderer; we're a KSharedPtr
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eraseRenderer();
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// check if new theme svg wants colorscheme applied
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bool wasApplyColors = applyColors;
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checkApplyColorHint();
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if (applyColors && !Theme::defaultTheme()->colorScheme()) {
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if (!wasApplyColors) {
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QObject::connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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} else {
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QObject::disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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localRectCache.clear();
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itemsToSave.clear();
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saveTimer->stop();
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//kDebug() << themePath << ">>>>>>>>>>>>>>>>>> theme changed";
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emit q->repaintNeeded();
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}
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void colorsChanged()
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{
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if (!applyColors) {
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return;
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}
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eraseRenderer();
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emit q->repaintNeeded();
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}
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Svg *q;
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static QHash<QString, SharedSvgRenderer::Ptr> s_renderers;
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QHash<QString, QRectF> localRectCache;
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QHash<QString, QPixmap> itemsToSave;
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QTimer *saveTimer;
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SharedSvgRenderer::Ptr renderer;
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QString themePath;
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QString path;
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QSizeF size;
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QSizeF naturalSize;
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bool multipleImages;
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bool themed;
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bool applyColors;
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};
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QHash<QString, SharedSvgRenderer::Ptr> SvgPrivate::s_renderers;
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Svg::Svg(QObject *parent)
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: QObject(parent),
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d(new SvgPrivate(this))
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{
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d->saveTimer = new QTimer(this);
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d->saveTimer->setSingleShot(true);
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connect(d->saveTimer, SIGNAL(timeout()), this, SLOT(scheduledCacheUpdate()));
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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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QPixmap Svg::pixmap(const QString &elementID)
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{
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if (elementID.isNull() || d->multipleImages) {
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return d->findInCache(elementID, size());
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} else {
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return d->findInCache(elementID);
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}
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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(elementID.isNull() ? d->findInCache(elementID, size()) :
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d->findInCache(elementID));
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if (pix.isNull()) {
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return;
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}
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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(d->findInCache(elementID, rect.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::paint(QPainter *painter, int x, int y, int width, int height, const QString &elementID)
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{
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QPixmap pix(d->findInCache(elementID, QSizeF(width, height)));
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painter->drawPixmap(x, y, pix, 0, 0, pix.size().width(), pix.size().height());
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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::resize(qreal width, qreal 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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if (qFuzzyCompare(size.width(), d->size.width()) &&
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qFuzzyCompare(size.height(), d->size.height())) {
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return;
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}
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d->size = size;
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d->localRectCache.clear();
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}
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void Svg::resize()
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{
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QSizeF newSize;
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if (d->renderer) {
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newSize = d->renderer->defaultSize();
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}
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if (qFuzzyCompare(newSize.width(), d->size.width()) &&
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qFuzzyCompare(newSize.height(), d->size.height())) {
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return;
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}
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d->size = newSize;
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d->localRectCache.clear();
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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->elementRect(elementId).size().toSize();
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}
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QRectF 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::hasElement(const QString &elementId) const
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{
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if (d->path.isNull() && d->themePath.isNull()) {
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return false;
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}
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QString id = d->cacheId(elementId);
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if (d->localRectCache.contains(id)) {
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return d->localRectCache.value(id).isValid();
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}
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QRectF elementRect;
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bool found = Theme::defaultTheme()->findInRectsCache(d->path, id, elementRect);
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if (found) {
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return elementRect.isValid();
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} else {
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// kDebug() << "** ** *** !!!!!!!! *** ** ** creating renderer due to hasElement miss" << d->path << elementId;
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d->findAndCacheElementRect(elementId);
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return d->renderer->elementExists(elementId);
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}
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}
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QString Svg::elementAtPoint(const QPoint &point) const
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{
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Q_UNUSED(point)
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return QString();
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/*
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FIXME: implement when Qt can support us!
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d->createRenderer();
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QSizeF naturalSize = d->renderer->defaultSize();
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qreal dx = d->size.width() / naturalSize.width();
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qreal dy = d->size.height() / naturalSize.height();
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//kDebug() << point << "is really"
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// << QPoint(point.x() *dx, naturalSize.height() - point.y() * dy);
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return QString(); // d->renderer->elementAtPoint(QPoint(point.x() *dx, naturalSize.height() - point.y() * dy));
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*/
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}
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bool Svg::isValid() const
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{
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if (d->path.isNull() && d->themePath.isNull()) {
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return false;
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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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void Svg::setContainsMultipleImages(bool multiple)
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{
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d->multipleImages = multiple;
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}
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bool Svg::containsMultipleImages() const
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{
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return d->multipleImages;
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}
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void Svg::setImagePath(const QString &svgFilePath)
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{
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d->setImagePath(svgFilePath, this);
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d->eraseRenderer();
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emit repaintNeeded();
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}
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QString Svg::imagePath() const
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{
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return d->themed ? d->themePath : d->path;
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}
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} // Plasma namespace
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#include "svg.moc"
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