341 lines
13 KiB
C++
341 lines
13 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain
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** additional rights. These rights are described in the Nokia Qt LGPL
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** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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** package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at qt-sales@nokia.com.
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**
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****************************************************************************/
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#include "qticonloader.h"
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#include <QtGui/QPixmapCache>
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#include <QtCore/QList>
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#include <QtCore/QHash>
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#include <QtCore/QDir>
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#include <QtCore/QString>
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#include <QtCore/QLibrary>
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#include <QtCore/QSettings>
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#include <QtCore/QTextStream>
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#ifdef Q_WS_X11
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class QIconTheme
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{
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public:
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QIconTheme(QHash <int, QString> dirList, QStringList parents) :
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_dirList(dirList), _parents(parents), _valid(true){ }
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QIconTheme() : _valid(false){ }
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QHash <int, QString> dirList() {return _dirList;}
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QStringList parents() {return _parents;}
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bool isValid() {return _valid;}
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private:
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QHash <int, QString> _dirList;
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QStringList _parents;
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bool _valid;
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};
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class QtIconLoaderImplementation
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{
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public:
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QtIconLoaderImplementation();
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QPixmap findIcon(int size, const QString &name) const;
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private:
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QIconTheme parseIndexFile(const QString &themeName) const;
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void lookupIconTheme() const;
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QPixmap findIconHelper(int size,
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const QString &themeName,
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const QString &iconName,
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QStringList &visited) const;
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mutable QString themeName;
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mutable QStringList iconDirs;
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mutable QHash <QString, QIconTheme> themeList;
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};
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Q_GLOBAL_STATIC(QtIconLoaderImplementation, iconLoaderInstance)
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#endif
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/*!
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Returns the standard icon for the given icon /a name
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as specified in the freedesktop icon spec
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http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
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/a fallback is an optional argument to specify the icon to be used if
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no icon is found on the platform. This is particularily useful for
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crossplatform code.
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*/
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QIcon QtIconLoader::icon(const QString &name, const QIcon &fallback)
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{
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QIcon icon;
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#ifdef Q_WS_X11
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QString pngExtension(QLatin1String(".png"));
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QList<int> iconSizes;
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iconSizes << 16 << 24 << 32 << 48 << 64;
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Q_FOREACH (int size, iconSizes) {
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icon.addPixmap(iconLoaderInstance()->findIcon(size, name + pngExtension));
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}
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#endif
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if (icon.isNull())
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icon = fallback;
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Q_UNUSED(name);
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return icon;
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}
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#ifdef Q_WS_X11
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QtIconLoaderImplementation::QtIconLoaderImplementation()
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{
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lookupIconTheme();
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}
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extern "C" {
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struct GConfClient;
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struct GError;
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typedef void (*Ptr_g_type_init)();
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typedef GConfClient* (*Ptr_gconf_client_get_default)();
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typedef char* (*Ptr_gconf_client_get_string)(GConfClient*, const char*, GError **);
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typedef void (*Ptr_g_object_unref)(void *);
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typedef void (*Ptr_g_error_free)(GError *);
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typedef void (*Ptr_g_free)(void*);
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static Ptr_g_type_init p_g_type_init = 0;
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static Ptr_gconf_client_get_default p_gconf_client_get_default = 0;
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static Ptr_gconf_client_get_string p_gconf_client_get_string = 0;
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static Ptr_g_object_unref p_g_object_unref = 0;
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static Ptr_g_error_free p_g_error_free = 0;
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static Ptr_g_free p_g_free = 0;
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}
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static int kdeVersion()
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{
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static int version = qgetenv("KDE_SESSION_VERSION").toInt();
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return version;
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}
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static QString kdeHome()
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{
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static QString kdeHomePath;
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if (kdeHomePath.isEmpty()) {
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kdeHomePath = QFile::decodeName(qgetenv("KDEHOME"));
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if (kdeHomePath.isEmpty()) {
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int kdeSessionVersion = kdeVersion();
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QDir homeDir(QDir::homePath());
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QString kdeConfDir(QLatin1String("/.kde"));
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if (4 == kdeSessionVersion && homeDir.exists(QLatin1String(".kde4")))
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kdeConfDir = QLatin1String("/.kde4");
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kdeHomePath = QDir::homePath() + kdeConfDir;
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}
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}
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return kdeHomePath;
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}
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void QtIconLoaderImplementation::lookupIconTheme() const
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{
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#ifdef Q_WS_X11
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QString dataDirs = QFile::decodeName(getenv("XDG_DATA_DIRS"));
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if (dataDirs.isEmpty())
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dataDirs = QLatin1String("/usr/local/share/:/usr/share/");
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dataDirs.prepend(QDir::homePath() + QLatin1String("/:"));
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iconDirs = dataDirs.split(QLatin1Char(':'));
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// If we are running GNOME we resolve and use GConf. In all other
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// cases we currently use the KDE icon theme
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if (qgetenv("DESKTOP_SESSION") == "gnome" ||
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!qgetenv("GNOME_DESKTOP_SESSION_ID").isEmpty()) {
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if (themeName.isEmpty()) {
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// Resolve glib and gconf
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p_g_type_init = (Ptr_g_type_init)QLibrary::resolve(QLatin1String("gobject-2.0"), 0, "g_type_init");
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p_gconf_client_get_default = (Ptr_gconf_client_get_default)QLibrary::resolve(QLatin1String("gconf-2"), 4, "gconf_client_get_default");
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p_gconf_client_get_string = (Ptr_gconf_client_get_string)QLibrary::resolve(QLatin1String("gconf-2"), 4, "gconf_client_get_string");
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p_g_object_unref = (Ptr_g_object_unref)QLibrary::resolve(QLatin1String("gobject-2.0"), 0, "g_object_unref");
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p_g_error_free = (Ptr_g_error_free)QLibrary::resolve(QLatin1String("glib-2.0"), 0, "g_error_free");
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p_g_free = (Ptr_g_free)QLibrary::resolve(QLatin1String("glib-2.0"), 0, "g_free");
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if (p_g_type_init && p_gconf_client_get_default &&
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p_gconf_client_get_string && p_g_object_unref &&
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p_g_error_free && p_g_free) {
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p_g_type_init();
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GConfClient* client = p_gconf_client_get_default();
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GError *err = 0;
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char *str = p_gconf_client_get_string(client, "/desktop/gnome/interface/icon_theme", &err);
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if (!err) {
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themeName = QString::fromUtf8(str);
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p_g_free(str);
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}
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p_g_object_unref(client);
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if (err)
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p_g_error_free (err);
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}
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if (themeName.isEmpty())
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themeName = QLatin1String("gnome");
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}
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if (!themeName.isEmpty())
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return;
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}
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// KDE (and others)
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if (dataDirs.isEmpty())
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dataDirs = QLatin1String("/usr/local/share/:/usr/share/");
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dataDirs += QLatin1Char(':') + kdeHome() + QLatin1String("/share");
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dataDirs.prepend(QDir::homePath() + QLatin1String("/:"));
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QStringList kdeDirs = QFile::decodeName(getenv("KDEDIRS")).split(QLatin1Char(':'));
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Q_FOREACH (const QString dirName, kdeDirs)
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dataDirs.append(QLatin1Char(':') + dirName + QLatin1String("/share"));
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iconDirs = dataDirs.split(QLatin1Char(':'));
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QFileInfo fileInfo(QLatin1String("/usr/share/icons/default.kde"));
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QDir dir(fileInfo.canonicalFilePath());
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QString kdeDefault = kdeVersion() >= 4 ? QString::fromLatin1("oxygen") : QString::fromLatin1("crystalsvg");
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QString defaultTheme = fileInfo.exists() ? dir.dirName() : kdeDefault;
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QSettings settings(kdeHome() + QLatin1String("/share/config/kdeglobals"), QSettings::IniFormat);
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settings.beginGroup(QLatin1String("Icons"));
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themeName = settings.value(QLatin1String("Theme"), defaultTheme).toString();
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#endif
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}
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QIconTheme QtIconLoaderImplementation::parseIndexFile(const QString &themeName) const
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{
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QIconTheme theme;
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QFile themeIndex;
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QStringList parents;
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QHash <int, QString> dirList;
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for ( int i = 0 ; i < iconDirs.size() && !themeIndex.exists() ; ++i) {
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const QString &contentDir = QLatin1String(iconDirs[i].startsWith(QDir::homePath()) ? "/.icons/" : "/icons/");
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themeIndex.setFileName(iconDirs[i] + contentDir + themeName + QLatin1String("/index.theme"));
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}
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if (themeIndex.exists()) {
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QSettings indexReader(themeIndex.fileName(), QSettings::IniFormat);
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Q_FOREACH (const QString &key, indexReader.allKeys()) {
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if (key.endsWith("/Size")) {
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if (int size = indexReader.value(key).toInt())
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dirList.insertMulti(size, key.left(key.size() - 5));
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}
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}
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// Parent themes provide fallbacks for missing icons
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parents = indexReader.value(QLatin1String("Icon Theme/Inherits")).toStringList();
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}
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if (kdeVersion() >= 3) {
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QFileInfo fileInfo(QLatin1String("/usr/share/icons/default.kde"));
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QDir dir(fileInfo.canonicalFilePath());
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QString defaultKDETheme = dir.exists() ? dir.dirName() : kdeVersion() == 3 ?
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QString::fromLatin1("crystalsvg") : QString::fromLatin1("oxygen");
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if (!parents.contains(defaultKDETheme) && themeName != defaultKDETheme)
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parents.append(defaultKDETheme);
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} else if (parents.isEmpty() && themeName != QLatin1String("hicolor")) {
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parents.append(QLatin1String("hicolor"));
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}
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theme = QIconTheme(dirList, parents);
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return theme;
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}
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QPixmap QtIconLoaderImplementation::findIconHelper(int size, const QString &themeName,
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const QString &iconName, QStringList &visited) const
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{
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QPixmap pixmap;
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if (!themeName.isEmpty()) {
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visited << themeName;
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QIconTheme theme = themeList.value(themeName);
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if (!theme.isValid()) {
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theme = parseIndexFile(themeName);
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themeList.insert(themeName, theme);
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}
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if (!theme.isValid())
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return QPixmap();
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QList <QString> subDirs = theme.dirList().values(size);
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for ( int i = 0 ; i < iconDirs.size() ; ++i) {
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for ( int j = 0 ; j < subDirs.size() ; ++j) {
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QString contentDir = (iconDirs[i].startsWith(QDir::homePath())) ?
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QLatin1String("/.icons/") : QLatin1String("/icons/");
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QString fileName = iconDirs[i] + contentDir + themeName + QLatin1Char('/') + subDirs[j] + QLatin1Char('/') + iconName;
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QFile file(fileName);
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if (file.exists())
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pixmap.load(fileName);
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if (!pixmap.isNull())
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break;
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}
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}
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if (pixmap.isNull()) {
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QStringList parents = theme.parents();
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//search recursively through inherited themes
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for (int i = 0 ; pixmap.isNull() && i < parents.size() ; ++i) {
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QString parentTheme = parents[i].trimmed();
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if (!visited.contains(parentTheme)) //guard against endless recursion
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pixmap = findIconHelper(size, parentTheme, iconName, visited);
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}
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}
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}
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return pixmap;
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}
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QPixmap QtIconLoaderImplementation::findIcon(int size, const QString &name) const
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{
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QPixmap pixmap;
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QString pixmapName = QLatin1String("$qt") + name + QString::number(size);
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if (QPixmapCache::find(pixmapName, pixmap))
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return pixmap;
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if (!themeName.isEmpty()) {
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QStringList visited;
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pixmap = findIconHelper(size, themeName, name, visited);
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}
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QPixmapCache::insert(pixmapName, pixmap);
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return pixmap;
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}
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#endif //Q_WS_X11
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