plasma-framework/wallpaper.cpp
2011-05-18 16:04:50 +02:00

636 lines
16 KiB
C++

/*
* Copyright 2008 by Aaron Seigo <aseigo@kde.org>
* Copyright 2008 by Petri Damsten <damu@iki.fi>
*
* 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.
*/
#include "wallpaper.h"
#include "config-plasma.h"
#include <QColor>
#include <QFile>
#include <QFileInfo>
#include <QImage>
#include <QAction>
#include <QQueue>
#include <QTimer>
#include <QRunnable>
#include <QThreadPool>
#include <kdebug.h>
#include <kglobal.h>
#include <kservicetypetrader.h>
#include <kstandarddirs.h>
#ifndef PLASMA_NO_KIO
#include <kio/job.h>
#endif
#include <version.h>
#include "plasma/package.h"
#include "plasma/private/dataengineconsumer_p.h"
#include "plasma/private/packages_p.h"
#include "plasma/private/wallpaper_p.h"
namespace Plasma
{
class SaveImageThread : public QRunnable
{
QImage m_image;
QString m_filePath;
public:
SaveImageThread(const QImage &image, const QString &filePath)
{
m_image = image;
m_filePath = filePath;
}
void run()
{
m_image.save(m_filePath);
}
};
LoadImageThread::LoadImageThread(const QString &filePath)
{
m_filePath = filePath;
}
void LoadImageThread::run()
{
QImage image;
image.load(m_filePath);
emit done(image);
}
class WallpaperWithPaint : public Wallpaper
{
public:
WallpaperWithPaint(QObject *parent, const QVariantList &args)
: Wallpaper(parent, args)
{
}
virtual void paint(QPainter *painter, const QRectF &exposedRect)
{
if (d->script) {
d->script->paint(painter, exposedRect);
}
}
};
PackageStructure::Ptr WallpaperPrivate::s_packageStructure(0);
Wallpaper::Wallpaper(QObject * parentObject)
: d(new WallpaperPrivate(KService::serviceByStorageId(QString()), this))
{
setParent(parentObject);
}
Wallpaper::Wallpaper(QObject *parentObject, const QVariantList &args)
: d(new WallpaperPrivate(KService::serviceByStorageId(args.count() > 0 ?
args[0].toString() : QString()), this))
{
// now remove first item since those are managed by Wallpaper and subclasses shouldn't
// need to worry about them. yes, it violates the constness of this var, but it lets us add
// or remove items later while applets can just pretend that their args always start at 0
QVariantList &mutableArgs = const_cast<QVariantList &>(args);
if (!mutableArgs.isEmpty()) {
mutableArgs.removeFirst();
}
setParent(parentObject);
}
Wallpaper::~Wallpaper()
{
delete d;
}
void Wallpaper::addUrls(const KUrl::List &urls)
{
if (d->script) {
d->script->addUrls(urls);
}
}
KPluginInfo::List Wallpaper::listWallpaperInfo(const QString &formFactor)
{
QString constraint;
if (!formFactor.isEmpty()) {
constraint.append("[X-Plasma-FormFactors] ~~ '").append(formFactor).append("'");
}
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Wallpaper", constraint);
return KPluginInfo::fromServices(offers);
}
KPluginInfo::List Wallpaper::listWallpaperInfoForMimetype(const QString &mimeType, const QString &formFactor)
{
QString constraint = QString("'%1' in [X-Plasma-DropMimeTypes]").arg(mimeType);
if (!formFactor.isEmpty()) {
constraint.append("[X-Plasma-FormFactors] ~~ '").append(formFactor).append("'");
}
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Wallpaper", constraint);
kDebug() << offers.count() << constraint;
return KPluginInfo::fromServices(offers);
}
bool Wallpaper::supportsMimetype(const QString &mimetype) const
{
return d->wallpaperDescription.isValid() &&
d->wallpaperDescription.service()->hasMimeType(mimetype);
}
Wallpaper *Wallpaper::load(const QString &wallpaperName, const QVariantList &args)
{
if (wallpaperName.isEmpty()) {
return 0;
}
QString constraint = QString("[X-KDE-PluginInfo-Name] == '%1'").arg(wallpaperName);
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Wallpaper", constraint);
if (offers.isEmpty()) {
kDebug() << "offers is empty for " << wallpaperName;
return 0;
}
KService::Ptr offer = offers.first();
QVariantList allArgs;
allArgs << offer->storageId() << args;
if (!offer->property("X-Plasma-API").toString().isEmpty()) {
kDebug() << "we have a script using the"
<< offer->property("X-Plasma-API").toString() << "API";
return new WallpaperWithPaint(0, allArgs);
}
KPluginLoader plugin(*offer);
if (!Plasma::isPluginVersionCompatible(plugin.pluginVersion())) {
return 0;
}
QString error;
Wallpaper *wallpaper = offer->createInstance<Plasma::Wallpaper>(0, allArgs, &error);
if (!wallpaper) {
kDebug() << "Couldn't load wallpaper \"" << wallpaperName << "\"! reason given: " << error;
}
return wallpaper;
}
Wallpaper *Wallpaper::load(const KPluginInfo &info, const QVariantList &args)
{
if (!info.isValid()) {
return 0;
}
return load(info.pluginName(), args);
}
PackageStructure::Ptr Wallpaper::packageStructure(Wallpaper *paper)
{
if (paper) {
PackageStructure::Ptr package(new WallpaperPackage(paper));
return package;
}
if (!WallpaperPrivate::s_packageStructure) {
WallpaperPrivate::s_packageStructure = new WallpaperPackage();
}
return WallpaperPrivate::s_packageStructure;
}
QString Wallpaper::name() const
{
if (!d->wallpaperDescription.isValid()) {
return i18n("Unknown Wallpaper");
}
return d->wallpaperDescription.name();
}
QString Wallpaper::icon() const
{
if (!d->wallpaperDescription.isValid()) {
return QString();
}
return d->wallpaperDescription.icon();
}
QString Wallpaper::pluginName() const
{
if (!d->wallpaperDescription.isValid()) {
return QString();
}
return d->wallpaperDescription.pluginName();
}
KServiceAction Wallpaper::renderingMode() const
{
return d->mode;
}
QList<KServiceAction> Wallpaper::listRenderingModes() const
{
if (!d->wallpaperDescription.isValid()) {
return QList<KServiceAction>();
}
return d->wallpaperDescription.service()->actions();
}
QRectF Wallpaper::boundingRect() const
{
return d->boundingRect;
}
bool Wallpaper::isInitialized() const
{
return d->initialized;
}
void Wallpaper::setBoundingRect(const QRectF &boundingRect)
{
d->boundingRect = boundingRect;
if (d->targetSize != boundingRect.size()) {
d->targetSize = boundingRect.size();
emit renderHintsChanged();
}
}
void Wallpaper::setRenderingMode(const QString &mode)
{
if (d->mode.name() == mode) {
return;
}
d->mode = KServiceAction();
if (!mode.isEmpty()) {
QList<KServiceAction> modes = listRenderingModes();
foreach (const KServiceAction &action, modes) {
if (action.name() == mode) {
d->mode = action;
break;
}
}
}
}
void Wallpaper::restore(const KConfigGroup &config)
{
init(config);
d->initialized = true;
}
void Wallpaper::init(const KConfigGroup &config)
{
if (d->script) {
d->initScript();
d->script->initWallpaper(config);
}
}
void Wallpaper::save(KConfigGroup &config)
{
if (d->script) {
d->script->save(config);
}
}
QWidget *Wallpaper::createConfigurationInterface(QWidget *parent)
{
if (d->script) {
return d->script->createConfigurationInterface(parent);
} else {
return 0;
}
}
void Wallpaper::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
if (d->script) {
return d->script->mouseMoveEvent(event);
}
}
void Wallpaper::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (d->script) {
return d->script->mousePressEvent(event);
}
}
void Wallpaper::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (d->script) {
return d->script->mouseReleaseEvent(event);
}
}
void Wallpaper::wheelEvent(QGraphicsSceneWheelEvent *event)
{
if (d->script) {
return d->script->wheelEvent(event);
}
}
DataEngine *Wallpaper::dataEngine(const QString &name) const
{
return d->dataEngine(name);
}
bool Wallpaper::configurationRequired() const
{
return d->needsConfig;
}
void Wallpaper::setConfigurationRequired(bool needsConfig, const QString &reason)
{
//TODO: implement something for reason. first, we need to decide where/how
// to communicate it to the user
Q_UNUSED(reason)
if (d->needsConfig == needsConfig) {
return;
}
d->needsConfig = needsConfig;
emit configurationRequired(needsConfig);
}
bool Wallpaper::isUsingRenderingCache() const
{
return d->cacheRendering;
}
void Wallpaper::setUsingRenderingCache(bool useCache)
{
d->cacheRendering = useCache;
}
void Wallpaper::setResizeMethodHint(Wallpaper::ResizeMethod resizeMethod)
{
d->lastResizeMethod = resizeMethod;
emit renderHintsChanged();
}
void Wallpaper::setTargetSizeHint(const QSizeF &targetSize)
{
d->targetSize = targetSize;
emit renderHintsChanged();
}
void Wallpaper::render(const QString &sourceImagePath, const QSize &size,
Wallpaper::ResizeMethod resizeMethod, const QColor &color)
{
if (sourceImagePath.isEmpty() || !QFile::exists(sourceImagePath)) {
//kDebug() << "failed on:" << sourceImagePath;
return;
}
if (d->lastResizeMethod != resizeMethod) {
d->lastResizeMethod = resizeMethod;
emit renderHintsChanged();
}
if (d->cacheRendering) {
QFileInfo info(sourceImagePath);
QString cache = d->cacheKey(sourceImagePath, size, resizeMethod, color);
if (d->findInCache(cache, info.lastModified().toTime_t())) {
return;
}
}
WallpaperRenderRequest request;
d->renderToken = request.token;
request.requester = this;
request.file = sourceImagePath;
request.size = size;
request.resizeMethod = resizeMethod;
request.color = color;
WallpaperRenderThread::render(request);
//kDebug() << "rendering" << sourceImagePath << ", token is" << d->renderToken;
}
WallpaperPrivate::WallpaperPrivate(KService::Ptr service, Wallpaper *wallpaper) :
q(wallpaper),
wallpaperDescription(service),
package(0),
renderToken(-1),
lastResizeMethod(Wallpaper::ScaledResize),
script(0),
cacheRendering(false),
initialized(false),
needsConfig(false),
scriptInitialized(false),
previewing(false),
needsPreviewDuringConfiguration(false)
{
if (wallpaperDescription.isValid()) {
QString api = wallpaperDescription.property("X-Plasma-API").toString();
if (!api.isEmpty()) {
const QString path = KStandardDirs::locate("data",
"plasma/wallpapers/" + wallpaperDescription.pluginName() + '/');
PackageStructure::Ptr structure =
Plasma::packageStructure(api, Plasma::WallpaperComponent);
structure->setPath(path);
package = new Package(path, structure);
script = Plasma::loadScriptEngine(api, q);
if (!script) {
kDebug() << "Could not create a" << api << "ScriptEngine for the"
<< wallpaperDescription.name() << "Wallpaper.";
delete package;
package = 0;
}
}
}
}
QString WallpaperPrivate::cacheKey(const QString &sourceImagePath, const QSize &size,
int resizeMethod, const QColor &color) const
{
const QString id = QString("%5_%3_%4_%1x%2")
.arg(size.width()).arg(size.height()).arg(color.name())
.arg(resizeMethod).arg(sourceImagePath);
return id;
}
QString WallpaperPrivate::cachePath(const QString &key) const
{
return KGlobal::dirs()->locateLocal("cache", "plasma-wallpapers/" + key + ".png");
}
void WallpaperPrivate::newRenderCompleted(const WallpaperRenderRequest &request, const QImage &image)
{
kDebug() << request.token << renderToken;
if (request.token != renderToken) {
//kDebug() << "render token mismatch" << token << renderToken;
return;
}
if (cacheRendering) {
q->insertIntoCache(cacheKey(request.file, request.size, request.resizeMethod, request.color), image);
}
//kDebug() << "rendering complete!";
emit q->renderCompleted(image);
}
// put all setup routines for script here. at this point we can assume that
// package exists and that we have a script engine
void WallpaperPrivate::setupScriptSupport()
{
Q_ASSERT(package);
kDebug() << "setting up script support, package is in" << package->path()
<< "which is a" << package->structure()->type() << "package"
<< ", main script is" << package->filePath("mainscript");
QString translationsPath = package->filePath("translations");
if (!translationsPath.isEmpty()) {
KGlobal::dirs()->addResourceDir("locale", translationsPath);
KGlobal::locale()->insertCatalog(package->metadata().pluginName());
}
}
void WallpaperPrivate::initScript()
{
if (script && !scriptInitialized) {
setupScriptSupport();
script->init();
scriptInitialized = true;
}
}
bool WallpaperPrivate::findInCache(const QString &key, unsigned int lastModified)
{
if (cacheRendering) {
QString cache = cachePath(key);
if (QFile::exists(cache)) {
if (lastModified > 0) {
QFileInfo info(cache);
if (info.lastModified().toTime_t() < lastModified) {
return false;
}
}
LoadImageThread *loadImageT = new LoadImageThread(cache);
q->connect(loadImageT, SIGNAL(done(const QImage&)), q, SIGNAL(renderCompleted(const QImage&)));
QThreadPool::globalInstance()->start(loadImageT);
return true;
}
}
return false;
}
bool Wallpaper::findInCache(const QString &key, QImage &image, unsigned int lastModified)
{
if (d->cacheRendering) {
QString cache = d->cachePath(key);
if (QFile::exists(cache)) {
if (lastModified > 0) {
QFileInfo info(cache);
if (info.lastModified().toTime_t() < lastModified) {
return false;
}
}
image.load(cache);
return true;
}
}
return false;
}
void Wallpaper::insertIntoCache(const QString& key, const QImage &image)
{
//TODO: cache limits?
if (key.isEmpty()) {
return;
}
if (d->cacheRendering) {
if (image.isNull()) {
#ifndef PLASMA_NO_KIO
KIO::file_delete(d->cachePath(key));
#else
QFile f(d->cachePath(key));
f.remove();
#endif
} else {
QThreadPool::globalInstance()->start(new SaveImageThread(image, d->cachePath(key)));
}
}
}
QList<QAction*> Wallpaper::contextualActions() const
{
return d->contextActions;
}
void Wallpaper::setContextualActions(const QList<QAction*> &actions)
{
d->contextActions = actions;
}
bool Wallpaper::isPreviewing() const
{
return d->previewing;
}
void Wallpaper::setPreviewing(bool previewing)
{
d->previewing = previewing;
}
bool Wallpaper::needsPreviewDuringConfiguration() const
{
return d->needsPreviewDuringConfiguration;
}
void Wallpaper::setPreviewDuringConfiguration(const bool preview)
{
d->needsPreviewDuringConfiguration = preview;
}
const Package *Wallpaper::package() const
{
return d->package;
}
} // Plasma namespace
#include "wallpaper.moc"
#include "private/wallpaper_p.moc"