Introducing icon theme support

Added some static functions to QIcon to support desktop
themes based on the freedesktop spec. It is not intended to
replace KIcon and the intention is to use it when available to
share icon cache between applications.

Applications currently using icon themes are Assistant, Designer
and the textedit demo.

Reviewed-by: ogoffart

1 files changed, 138 insertions, 0 deletions

diff --git a/src/gui/image/qicon_p.h b/src/gui/image/qicon_p.h
new file mode 100644
index 0000000..ccac4c3
--- /dev/null
+++ b/src/gui/image/qicon_p.h
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QICON_P_H
+#define QICON_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qglobal.h>
+#include <QtCore/qsize.h>
+#include <QtCore/qlist.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qicon.h>
+#include <QtGui/qiconengine.h>
+
+QT_BEGIN_NAMESPACE
+
+class QIconPrivate
+{
+public:
+    QIconPrivate();
+
+    ~QIconPrivate() {
+        if (engine_version == 1) {
+            if (!v1RefCount->deref()) {
+                delete engine;
+                delete v1RefCount;
+            }
+        } else if (engine_version == 2) {
+            delete engine;
+        }
+    }
+
+    QIconEngine *engine;
+
+    QAtomicInt ref;
+    int serialNum;
+    int detach_no;
+    int engine_version;
+
+    QAtomicInt *v1RefCount;
+};
+
+
+struct QPixmapIconEngineEntry
+{
+    QPixmapIconEngineEntry():mode(QIcon::Normal), state(QIcon::Off){}
+    QPixmapIconEngineEntry(const QPixmap &pm, QIcon::Mode m = QIcon::Normal, QIcon::State s = QIcon::Off)
+        :pixmap(pm), size(pm.size()), mode(m), state(s){}
+    QPixmapIconEngineEntry(const QString &file, const QSize &sz = QSize(), QIcon::Mode m = QIcon::Normal, QIcon::State s = QIcon::Off)
+        :fileName(file), size(sz), mode(m), state(s){}
+    QPixmap pixmap;
+    QString fileName;
+    QSize size;
+    QIcon::Mode mode;
+    QIcon::State state;
+    bool isNull() const {return (fileName.isEmpty() && pixmap.isNull()); }
+};
+
+
+
+class QPixmapIconEngine : public QIconEngineV2 {
+public:
+    QPixmapIconEngine();
+    QPixmapIconEngine(const QPixmapIconEngine &);
+    ~QPixmapIconEngine();
+    void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state);
+    QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state);
+    QPixmapIconEngineEntry *bestMatch(const QSize &size, QIcon::Mode mode, QIcon::State state, bool sizeOnly);
+    QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state);
+    void addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state);
+    void addFile(const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state);
+
+    // v2 functions
+    QString key() const;
+    QIconEngineV2 *clone() const;
+    bool read(QDataStream &in);
+    bool write(QDataStream &out) const;
+    void virtual_hook(int id, void *data);
+
+private:
+    QPixmapIconEngineEntry *tryMatch(const QSize &size, QIcon::Mode mode, QIcon::State state);
+    QVector<QPixmapIconEngineEntry> pixmaps;
+
+    friend QDataStream &operator<<(QDataStream &s, const QIcon &icon);
+    friend class QIconThemeEngine;
+};
+
+QT_END_NAMESPACE
+
+#endif // QICON_P_H