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 <QX11Info>
#include <KWindowSystem>
#include <KColorScheme>
#include <KConfigGroup>
#include <KDebug>
#include <KSelectionWatcher>
#include <KSharedConfig>
#include <KStandardDirs>
#include <KGlobalSettings>
#include "plasma/packages_p.h"
namespace Plasma
{
class Theme::Private
{
public:
Private()
: locolor(false),
compositingActive(KWindowSystem::compositingActive())
{
generalFont = QApplication::font();
}
KConfigGroup config()
{
QString groupName = "Theme";
if (!app.isEmpty() && app != "plasma") {
groupName.append("-").append(app);
}
KSharedConfigPtr config = KSharedConfig::openConfig("plasmarc");
return KConfigGroup(config, groupName);
}
QString findInTheme(const QString &image, const QString &theme) const;
static const char *defaultTheme;
static PackageStructure::Ptr packageStructure;
QString themeName;
QString app;
KSharedConfigPtr colors;
QFont generalFont;
bool locolor;
bool compositingActive;
#ifdef Q_WS_X11
KSelectionWatcher *compositeWatch;
#endif
};
PackageStructure::Ptr Theme::Private::packageStructure(0);
const char *Theme::Private::defaultTheme = "default";
class ThemeSingleton
{
public:
Theme self;
};
K_GLOBAL_STATIC( ThemeSingleton, privateThemeSelf )
Theme* Theme::self()
{
return &privateThemeSelf->self;
}
Theme::Theme(QObject* parent)
: QObject(parent),
d(new Private)
{
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
}
Theme::~Theme()
{
d->config().writeEntry("name", d->themeName);
delete d;
}
PackageStructure::Ptr Theme::packageStructure()
{
if (!Private::packageStructure) {
Private::packageStructure = new ThemePackage();
}
return Private::packageStructure;
}
void Theme::setApplication(const QString &appname)
{
if (d->app != appname) {
d->app = appname;
settingsChanged();
}
}
void Theme::settingsChanged()
{
setThemeName(d->config().readEntry("name", Private::defaultTheme));
}
void Theme::compositingChanged()
{
#ifdef Q_WS_X11
bool compositingActive = d->compositeWatch->owner() != None;
if (d->compositingActive != compositingActive) {
d->compositingActive = compositingActive;
emit changed();
}
#endif
}
void Theme::colorsChanged()
{
emit changed();
}
void Theme::setThemeName(const QString &themeName)
{
QString theme = themeName;
if (theme.isEmpty() || theme == d->themeName) {
// let's try and get the default theme at least
if (d->themeName.isEmpty()) {
theme = Private::defaultTheme;
} else {
return;
}
}
//TODO: should we care about names with relative paths in them?
QString themePath = KStandardDirs::locate("data", "desktoptheme/" + theme + "/");
if (themePath.isEmpty() && d->themeName.isEmpty()) {
themePath = KStandardDirs::locate("data", "desktoptheme/default/");
if (themePath.isEmpty()) {
return;
}
theme = Private::defaultTheme;
}
d->themeName = theme;
// load the color scheme config
QString colorsFile = KStandardDirs::locate("data", "desktoptheme/" + theme + "/colors");
//kDebug() << "we're going for..." << colorsFile << "*******************";
disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()), this, SLOT(colorsChanged()));
if (colorsFile.isEmpty()) {
d->colors = 0;
connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()), this, SLOT(colorsChanged()));
} else {
d->colors = KSharedConfig::openConfig(colorsFile);
}
KConfigGroup cg = d->config();
if (cg.readEntry("name", Private::defaultTheme) != d->themeName) {
cg.writeEntry("name", d->themeName);
cg.config()->sync();
}
emit changed();
}
QString Theme::themeName() const
{
return d->themeName;
}
QString Theme::Private::findInTheme(const QString &image, const QString &theme) const
{
//TODO: this should be using Package
QString search;
if (locolor) {
search = "desktoptheme/" + theme + "/locolor/" + image + ".svg";
search = KStandardDirs::locate("data", search);
} else if (!compositingActive) {
search = "desktoptheme/" + theme + "/opaque/" + image + ".svg";
search = KStandardDirs::locate("data", search);
}
//not found or compositing enabled
if (search.isEmpty()) {
search = "desktoptheme/" + theme + '/' + image + ".svg";
search = KStandardDirs::locate("data", search);
}
return search;
}
QString Theme::image(const QString& name) const
{
QString path = d->findInTheme(name, d->themeName);
if (path.isEmpty() && d->themeName != Private::defaultTheme) {
path = d->findInTheme(name, Private::defaultTheme);
}
if (path.isEmpty()) {
kDebug() << "Theme says: bad image path " << name;
}
return path;
}
KSharedConfigPtr Theme::colors() const
{
return d->colors;
}
QColor Theme::textColor() const
{
KColorScheme colors(QPalette::Active, KColorScheme::Window, Theme::self()->colors());
return colors.foreground(KColorScheme::NormalText).color();
}
QColor Theme::backgroundColor() const
{
KColorScheme colors(QPalette::Active, KColorScheme::Window, Theme::self()->colors());
return colors.background().color();
}
void Theme::setFont(const QFont &font)
{
d->generalFont = font;
}
QFont Theme::font() const
{
//TODO: allow this to be overridden with a plasma specific font?
return d->generalFont;
}
QFontMetrics Theme::fontMetrics() const
{
//TODO: allow this to be overridden with a plasma specific font?
return QFontMetrics(d->generalFont);
}
}
#include <theme.moc>