plasma-framework/theme.cpp

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/*
* Copyright 2006-2007 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.
*/
#include "theme.h"
#include <QApplication>
#include <QFile>
#include <QFileInfo>
#ifdef Q_WS_X11
#include <QX11Info>
#endif
#include <kcolorscheme.h>
#include <kcomponentdata.h>
#include <kconfiggroup.h>
#include <kdebug.h>
#include <kdirwatch.h>
#include <kglobal.h>
#include <kglobalsettings.h>
#include <kmanagerselection.h>
#include <kpixmapcache.h>
#include <ksharedconfig.h>
#include <kstandarddirs.h>
#include <kwindowsystem.h>
#include "private/packages_p.h"
namespace Plasma
{
#define DEFAULT_WALLPAPER_THEME "Air"
#define DEFAULT_WALLPAPER_SUFFIX ".jpg"
static const int DEFAULT_WALLPAPER_WIDTH = 1920;
static const int DEFAULT_WALLPAPER_HEIGHT = 1200;
class ThemePrivate
{
public:
ThemePrivate(Theme *theme)
: q(theme),
colorScheme(QPalette::Active, KColorScheme::Window, KSharedConfigPtr(0)),
buttonColorScheme(QPalette::Active, KColorScheme::Button, KSharedConfigPtr(0)),
defaultWallpaperTheme(DEFAULT_WALLPAPER_THEME),
defaultWallpaperSuffix(DEFAULT_WALLPAPER_SUFFIX),
defaultWallpaperWidth(DEFAULT_WALLPAPER_WIDTH),
defaultWallpaperHeight(DEFAULT_WALLPAPER_HEIGHT),
pixmapCache(0),
locolor(false),
compositingActive(KWindowSystem::compositingActive()),
isDefault(false),
useGlobal(true),
hasWallpapers(false),
useNativeWidgetStyle(false)
{
generalFont = QApplication::font();
cacheTheme = cacheConfig().readEntry("CacheTheme", true);
}
~ThemePrivate()
{
delete pixmapCache;
}
KConfigGroup cacheConfig()
{
return KConfigGroup(KSharedConfig::openConfig(themeRcFile), "CachePolicies");
}
KConfigGroup &config()
{
if (!cfg.isValid()) {
QString groupName = "Theme";
if (!useGlobal) {
QString app = KGlobal::mainComponent().componentName();
if (!app.isEmpty() && app != "plasma") {
kDebug() << "using theme for app" << app;
groupName.append("-").append(app);
}
}
cfg = KConfigGroup(KSharedConfig::openConfig(themeRcFile), groupName);
}
return cfg;
}
QString findInTheme(const QString &image, const QString &theme) const;
void compositingChanged();
void discardCache();
void discardCache(bool recreateElementsCache);
void colorsChanged();
bool useCache();
void settingsFileChanged(const QString &);
void setThemeName(const QString &themeName, bool writeSettings);
static const char *defaultTheme;
static const char *themeRcFile;
static PackageStructure::Ptr packageStructure;
Theme *q;
QString themeName;
KSharedConfigPtr colors;
KColorScheme colorScheme;
KColorScheme buttonColorScheme;
KConfigGroup cfg;
QFont generalFont;
QString defaultWallpaperTheme;
QString defaultWallpaperSuffix;
int defaultWallpaperWidth;
int defaultWallpaperHeight;
KPixmapCache *pixmapCache;
KSharedConfigPtr svgElementsCache;
QHash<QString, QSet<QString> > invalidElements;
#ifdef Q_WS_X11
KSelectionWatcher *compositeWatch;
#endif
bool locolor : 1;
bool compositingActive : 1;
bool isDefault : 1;
bool useGlobal : 1;
bool hasWallpapers : 1;
bool cacheTheme : 1;
bool useNativeWidgetStyle :1;
};
PackageStructure::Ptr ThemePrivate::packageStructure(0);
const char *ThemePrivate::defaultTheme = "default";
const char *ThemePrivate::themeRcFile = "plasmarc";
bool ThemePrivate::useCache()
{
if (cacheTheme && !pixmapCache) {
pixmapCache = new KPixmapCache("plasma_theme_" + themeName);
pixmapCache->setCacheLimit(cacheConfig().readEntry("ThemeCacheKb", 80 * 1024));
}
return cacheTheme;
}
QString ThemePrivate::findInTheme(const QString &image, const QString &theme) const
{
//TODO: this should be using Package
QString search;
if (locolor) {
search = "desktoptheme/" + theme + "/locolor/" + image;
search = KStandardDirs::locate("data", search);
} else if (!compositingActive) {
search = "desktoptheme/" + theme + "/opaque/" + image;
search = KStandardDirs::locate("data", search);
}
//not found or compositing enabled
if (search.isEmpty()) {
search = "desktoptheme/" + theme + '/' + image;
search = KStandardDirs::locate("data", search);
}
return search;
}
void ThemePrivate::compositingChanged()
{
#ifdef Q_WS_X11
bool nowCompositingActive = compositeWatch->owner() != None;
if (compositingActive != nowCompositingActive) {
compositingActive = nowCompositingActive;
discardCache(true);
emit q->themeChanged();
}
#endif
}
void ThemePrivate::discardCache()
{
discardCache(true);
}
void ThemePrivate::discardCache(bool recreateElementsCache)
{
KPixmapCache::deleteCache("plasma_theme_" + themeName);
delete pixmapCache;
pixmapCache = 0;
invalidElements.clear();
svgElementsCache = 0;
QString svgElementsFile = KStandardDirs::locateLocal("cache", "plasma-svgelements-" + themeName);
if (!svgElementsFile.isEmpty()) {
QFile f(svgElementsFile);
f.remove();
}
if (recreateElementsCache) {
svgElementsCache = KSharedConfig::openConfig(svgElementsFile);
}
}
void ThemePrivate::colorsChanged()
{
discardCache(true);
colorScheme = KColorScheme(QPalette::Active, KColorScheme::Window, colors);
buttonColorScheme = KColorScheme(QPalette::Active, KColorScheme::Button, colors);
emit q->themeChanged();
}
class ThemeSingleton
{
public:
ThemeSingleton()
{
self.d->isDefault = true;
}
Theme self;
};
K_GLOBAL_STATIC(ThemeSingleton, privateThemeSelf)
Theme *Theme::defaultTheme()
{
return &privateThemeSelf->self;
}
Theme::Theme(QObject *parent)
: QObject(parent),
d(new ThemePrivate(this))
{
settingsChanged();
#ifdef Q_WS_X11
Display *dpy = QX11Info::display();
int screen = DefaultScreen(dpy);
d->locolor = DefaultDepth(dpy, screen) < 16;
if (!d->locolor) {
char net_wm_cm_name[100];
sprintf(net_wm_cm_name, "_NET_WM_CM_S%d", screen);
d->compositeWatch = new KSelectionWatcher(net_wm_cm_name, -1, this);
connect(d->compositeWatch, SIGNAL(newOwner(Window)), this, SLOT(compositingChanged()));
connect(d->compositeWatch, SIGNAL(lostOwner()), this, SLOT(compositingChanged()));
}
#endif
//FIXME: if/when kconfig gets change notification, this will be unecessary
KDirWatch::self()->addFile(KStandardDirs::locateLocal("config", ThemePrivate::themeRcFile));
connect(KDirWatch::self(), SIGNAL(created(QString)), this, SLOT(settingsFileChanged(QString)));
connect(KDirWatch::self(), SIGNAL(dirty(QString)), this, SLOT(settingsFileChanged(QString)));
}
Theme::~Theme()
{
QHashIterator<QString, QSet<QString> > it(d->invalidElements);
while (it.hasNext()) {
it.next();
KConfigGroup imageGroup(d->svgElementsCache, it.key());
imageGroup.writeEntry("invalidElements", it.value().toList()); //FIXME: add QSet support to KConfig
}
delete d;
}
PackageStructure::Ptr Theme::packageStructure()
{
if (!ThemePrivate::packageStructure) {
ThemePrivate::packageStructure = new ThemePackage();
}
return ThemePrivate::packageStructure;
}
void ThemePrivate::settingsFileChanged(const QString &file)
{
kDebug() << file;
config().config()->reparseConfiguration();
q->settingsChanged();
}
void Theme::settingsChanged()
{
d->setThemeName(d->config().readEntry("name", ThemePrivate::defaultTheme), false);
}
void Theme::setThemeName(const QString &themeName)
{
d->setThemeName(themeName, true);
}
void ThemePrivate::setThemeName(const QString &tempThemeName, bool writeSettings)
{
kDebug();
QString theme = tempThemeName;
if (theme.isEmpty() || theme == themeName) {
// let's try and get the default theme at least
if (themeName.isEmpty()) {
theme = ThemePrivate::defaultTheme;
} else {
return;
}
}
//TODO: should we care about names with relative paths in them?
QString themePath = KStandardDirs::locate("data", "desktoptheme/" + theme + '/');
if (themePath.isEmpty() && themeName.isEmpty()) {
themePath = KStandardDirs::locate("data", "desktoptheme/default/");
if (themePath.isEmpty()) {
return;
}
theme = ThemePrivate::defaultTheme;
}
if (themeName == theme) {
return;
}
//discard the old theme cache
if (!themeName.isEmpty() && pixmapCache) {
discardCache(false);
}
themeName = theme;
// load the color scheme config
QString colorsFile = KStandardDirs::locate("data", "desktoptheme/" + theme + "/colors");
//kDebug() << "we're going for..." << colorsFile << "*******************";
// load the wallpaper settings, if any
QString metadataPath(KStandardDirs::locate("data", "desktoptheme/" + theme + "/metadata.desktop"));
KConfig metadata(metadataPath);
KConfigGroup cg;
if (metadata.hasGroup("Wallpaper")) {
// we have a theme color config, so let's also check to see if
// there is a wallpaper defined in there.
cg = KConfigGroup(&metadata, "Wallpaper");
} else {
// since we didn't find an entry in the theme, let's look in the main
// theme config
cg = config();
}
defaultWallpaperTheme = cg.readEntry("defaultWallpaperTheme", DEFAULT_WALLPAPER_THEME);
defaultWallpaperSuffix = cg.readEntry("defaultFileSuffix", DEFAULT_WALLPAPER_SUFFIX);
defaultWallpaperWidth = cg.readEntry("defaultWidth", DEFAULT_WALLPAPER_WIDTH);
defaultWallpaperHeight = cg.readEntry("defaultHeight", DEFAULT_WALLPAPER_HEIGHT);
cg = KConfigGroup(&metadata, "Settings");
useNativeWidgetStyle = cg.readEntry("UseNativeWidgetStyle", false);
QObject::disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
q, SLOT(colorsChanged()));
if (colorsFile.isEmpty()) {
colors = 0;
QObject::connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
q, SLOT(colorsChanged()));
} else {
colors = KSharedConfig::openConfig(colorsFile);
}
colorScheme = KColorScheme(QPalette::Active, KColorScheme::Window, colors);
buttonColorScheme = KColorScheme(QPalette::Active, KColorScheme::Button, colors);
hasWallpapers = KStandardDirs::exists(KStandardDirs::locateLocal("data", "desktoptheme/" + theme + "/wallpapers/"));
if (isDefault && writeSettings) {
// we're the default theme, let's save our state
KConfigGroup &cg = config();
if (ThemePrivate::defaultTheme == themeName) {
cg.deleteEntry("name");
} else {
cg.writeEntry("name", themeName);
}
cg.sync();
}
//check for expired cache
QFile f(metadataPath);
QFileInfo info(f);
if (useCache() && info.lastModified().toTime_t() > pixmapCache->timestamp()) {
discardCache(false);
}
invalidElements.clear();
QString svgElementsFile = KStandardDirs::locateLocal("cache", "plasma-svgelements-" + themeName);
svgElementsCache = KSharedConfig::openConfig(svgElementsFile);
emit q->themeChanged();
}
QString Theme::themeName() const
{
return d->themeName;
}
QString Theme::imagePath(const QString &name) const
{
// look for a compressed svg file in the theme
if (name.contains("../")) {
// we don't support relative paths
return QString();
}
QString path = d->findInTheme(name + ".svgz", d->themeName);
if (path.isEmpty()) {
// try for an uncompressed svg file
path = d->findInTheme(name + ".svg", d->themeName);
if (path.isEmpty() && d->themeName != ThemePrivate::defaultTheme) {
// try a compressed svg file in the default theme
path = d->findInTheme(name + ".svgz", ThemePrivate::defaultTheme);
if (path.isEmpty()) {
// try an uncompressed svg file in the default theme
path = d->findInTheme(name + ".svg", ThemePrivate::defaultTheme);
}
}
}
if (path.isEmpty()) {
kDebug() << "Theme says: bad image path " << name;
}
return path;
}
QString Theme::wallpaperPath(const QSize &size) const
{
QString fullPath;
QString image = d->defaultWallpaperTheme;
image.append("/contents/images/%1x%2").append(d->defaultWallpaperSuffix);
QString defaultImage = image.arg(d->defaultWallpaperWidth).arg(d->defaultWallpaperHeight);
if (size.isValid()) {
// try to customize the paper to the size requested
//TODO: this should do better than just fallback to the default size.
// a "best fit" matching would be far better, so we don't end
// up returning a 1920x1200 wallpaper for a 640x480 request ;)
image = image.arg(size.width()).arg(size.height());
} else {
image = defaultImage;
}
//TODO: the theme's wallpaper overrides regularly installed wallpapers.
// should it be possible for user installed (e.g. locateLocal) wallpapers
// to override the theme?
if (d->hasWallpapers) {
// check in the theme first
fullPath = d->findInTheme("wallpapers/" + image, d->themeName);
if (fullPath.isEmpty()) {
fullPath = d->findInTheme("wallpapers/" + defaultImage, d->themeName);
}
}
if (fullPath.isEmpty()) {
// we failed to find it in the theme, so look in the standard directories
//kDebug() << "looking for" << image;
fullPath = KStandardDirs::locate("wallpaper", image);
}
if (fullPath.isEmpty()) {
// we still failed to find it in the theme, so look for the default in
// the standard directories
//kDebug() << "looking for" << defaultImage;
fullPath = KStandardDirs::locate("wallpaper", defaultImage);
if (fullPath.isEmpty()) {
kDebug() << "exhausted every effort to find a wallpaper.";
}
}
return fullPath;
}
bool Theme::currentThemeHasImage(const QString &name) const
{
if (name.contains("../")) {
// we don't support relative paths
return false;
}
return !(d->findInTheme(name + ".svgz", d->themeName).isEmpty()) ||
!(d->findInTheme(name + ".svg", d->themeName).isEmpty());
}
KSharedConfigPtr Theme::colorScheme() const
{
return d->colors;
}
QColor Theme::color(ColorRole role) const
{
switch (role) {
case TextColor:
return d->colorScheme.foreground(KColorScheme::NormalText).color();
break;
case HighlightColor:
return d->colorScheme.background(KColorScheme::ActiveBackground).color();
break;
case BackgroundColor:
return d->colorScheme.background().color();
break;
case ButtonTextColor:
return d->buttonColorScheme.foreground(KColorScheme::NormalText).color();
break;
case ButtonBackgroundColor:
return d->buttonColorScheme.background(KColorScheme::ActiveBackground).color();
break;
}
return QColor();
}
void Theme::setFont(const QFont &font, FontRole role)
{
Q_UNUSED(role)
d->generalFont = font;
}
QFont Theme::font(FontRole role) const
{
Q_UNUSED(role)
switch (role) {
case DesktopFont:
{
KConfigGroup cg(KGlobal::config(), "General");
return cg.readEntry("desktopFont", QFont("Sans Serif", 10));
}
break;
case DefaultFont:
default:
return d->generalFont;
break;
}
}
QFontMetrics Theme::fontMetrics() const
{
//TODO: allow this to be overridden with a plasma specific font?
return QFontMetrics(d->generalFont);
}
bool Theme::windowTranslucencyEnabled() const
{
return d->compositingActive;
}
void Theme::setUseGlobalSettings(bool useGlobal)
{
if (d->useGlobal == useGlobal) {
return;
}
d->useGlobal = useGlobal;
d->cfg = KConfigGroup();
d->themeName.clear();
settingsChanged();
}
bool Theme::useGlobalSettings() const
{
return d->useGlobal;
}
bool Theme::useNativeWidgetStyle() const
{
return d->useNativeWidgetStyle;
}
bool Theme::findInCache(const QString &key, QPixmap &pix)
{
return d->useCache() && d->pixmapCache->find(key, pix);
}
// BIC FIXME: Should be merged with the other findInCache method above when we break BC
bool Theme::findInCache(const QString &key, QPixmap &pix, unsigned int lastModified)
{
if (lastModified > d->pixmapCache->timestamp()) {
d->discardCache();
}
return findInCache(key, pix);
}
void Theme::insertIntoCache(const QString& key, const QPixmap& pix)
{
if (d->useCache()) {
d->pixmapCache->insert(key, pix);
}
}
bool Theme::findInRectsCache(const QString &image, const QString &element, QRectF &rect) const
{
if (!d->pixmapCache) {
return false;
}
KConfigGroup imageGroup(d->svgElementsCache, image);
rect = imageGroup.readEntry(element + "Size", QRectF());
if (rect.isValid()) {
return true;
}
//A single _ means the element is empty and we're asked for the size of
//the whole image, so the whole image is never invalid
if (element.count('_') == 1) {
return false;
}
bool invalid = false;
QHash<QString, QSet<QString> >::iterator it = d->invalidElements.find(image);
if (it == d->invalidElements.end()) {
QSet<QString> elements = imageGroup.readEntry("invalidElements", QStringList()).toSet();
d->invalidElements.insert(image, elements);
invalid = elements.contains(element);
} else {
invalid = it.value().contains(element);
}
return invalid;
}
void Theme::insertIntoRectsCache(const QString& image, const QString &element, const QRectF &rect)
{
if (!d->pixmapCache) {
return;
}
if (rect.isValid()) {
KConfigGroup imageGroup(d->svgElementsCache, image);
imageGroup.writeEntry(element + "Size", rect);
} else {
QHash<QString, QSet<QString> >::iterator it = d->invalidElements.find(image);
if (it == d->invalidElements.end()) {
d->invalidElements[image].insert(element);
} else if (!it.value().contains(element)) {
if (it.value().count() > 1000) {
it.value().erase(it.value().begin());
}
it.value().insert(element);
}
}
}
void Theme::invalidateRectsCache(const QString& image)
{
KConfigGroup imageGroup(d->svgElementsCache, image);
imageGroup.deleteGroup();
releaseRectsCache(image);
}
void Theme::releaseRectsCache(const QString &image)
{
QHash<QString, QSet<QString> >::iterator it = d->invalidElements.find(image);
if (it != d->invalidElements.end()) {
d->invalidElements.erase(it);
}
}
void Theme::setCacheLimit(int kbytes)
{
if (d->useCache()) {
d->pixmapCache->setCacheLimit(kbytes);
}
}
}
#include <theme.moc>