1 files changed, 298 insertions, 0 deletions
diff --git a/juk/filehandle.cpp b/juk/filehandle.cpp
new file mode 100644
index 00000000..583cfc0d
--- /dev/null
+++ b/juk/filehandle.cpp
@@ -0,0 +1,298 @@
+/***************************************************************************
+    begin                : Sun Feb 29 2004
+    copyright            : (C) 2004 by Scott Wheeler
+    email                : wheeler@kde.org
+***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <limits.h>
+#include <stdlib.h>
+
+#include <kdebug.h>
+
+#include <qfileinfo.h>
+
+#include "filehandle.h"
+#include "filehandleproperties.h"
+#include "tag.h"
+#include "cache.h"
+#include "coverinfo.h"
+
+AddProperty(Title, tag()->title())
+AddProperty(Artist, tag()->artist())
+AddProperty(Album, tag()->album())
+AddProperty(Genre, tag()->genre())
+AddNumberProperty(Track, tag()->track())
+AddNumberProperty(Year, tag()->year())
+AddProperty(Comment, tag()->comment())
+AddNumberProperty(Seconds, tag()->seconds())
+AddNumberProperty(Bitrate, tag()->bitrate())
+AddProperty(Path, absFilePath())
+AddNumberProperty(Size, fileInfo().size())
+AddProperty(Extension, fileInfo().extension(false))
+
+static QString resolveSymLinks(const QFileInfo &file) // static
+{
+    char real[PATH_MAX];
+
+    if(file.exists() && realpath(QFile::encodeName(file.absFilePath()).data(), real))
+        return QFile::decodeName(real);
+    else
+        return file.filePath();
+}
+
+/**
+ * A simple reference counter -- pasted from TagLib.
+ */
+
+class RefCounter
+{
+public:
+    RefCounter() : refCount(1) {}
+    void ref() { refCount++; }
+    bool deref() { return ! --refCount ; }
+    int count() const { return refCount; }
+private:
+    uint refCount;
+};
+
+class FileHandle::FileHandlePrivate : public RefCounter
+{
+public:
+    FileHandlePrivate() :
+        tag(0),
+        coverInfo(0) {}
+
+    ~FileHandlePrivate()
+    {
+        delete tag;
+        delete coverInfo;
+    }
+
+    mutable Tag *tag;
+    mutable CoverInfo *coverInfo;
+    mutable QString absFilePath;
+    QFileInfo fileInfo;
+    QDateTime modificationTime;
+    QDateTime lastModified;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public methods
+////////////////////////////////////////////////////////////////////////////////
+
+FileHandle::FileHandle()
+{
+    static FileHandlePrivate nullPrivate;
+    d = &nullPrivate;
+    d->ref();
+}
+
+FileHandle::FileHandle(const FileHandle &f) :
+    d(f.d)
+{
+    if(!d) {
+	kdDebug(65432) << "The source FileHandle was not initialized." << endl;
+	d = null().d;
+    }
+    d->ref();
+}
+
+FileHandle::FileHandle(const QFileInfo &info, const QString &path) :
+    d(0)
+{
+    setup(info, path);
+}
+
+FileHandle::FileHandle(const QString &path) :
+    d(0)
+{
+    setup(QFileInfo(path), path);
+}
+
+FileHandle::FileHandle(const QString &path, CacheDataStream &s)
+{
+    d = new FileHandlePrivate;
+    d->fileInfo = QFileInfo(path);
+    d->absFilePath = path;
+    read(s);
+    Cache::instance()->insert(*this);
+}
+
+FileHandle::~FileHandle()
+{
+    if(d->deref())
+        delete d;
+}
+
+void FileHandle::refresh()
+{
+    d->fileInfo.refresh();
+    delete d->tag;
+    d->tag = new Tag(d->absFilePath);
+}
+
+void FileHandle::setFile(const QString &path)
+{
+    if(!d || isNull())
+        setup(QFileInfo(path), path);
+    else {
+        d->absFilePath = resolveSymLinks(path);
+        d->fileInfo.setFile(path);
+        d->tag->setFileName(d->absFilePath);
+    }
+}
+
+Tag *FileHandle::tag() const
+{
+    if(!d->tag)
+        d->tag = new Tag(d->absFilePath);
+
+    return d->tag;
+}
+
+CoverInfo *FileHandle::coverInfo() const
+{
+    if(!d->coverInfo)
+        d->coverInfo = new CoverInfo(*this);
+
+    return d->coverInfo;
+}
+
+QString FileHandle::absFilePath() const
+{
+    if(d->absFilePath.isNull())
+        d->absFilePath = resolveSymLinks(d->fileInfo.absFilePath());
+    return d->absFilePath;
+}
+
+const QFileInfo &FileHandle::fileInfo() const
+{
+    return d->fileInfo;
+}
+
+bool FileHandle::isNull() const
+{
+    return *this == null();
+}
+
+bool FileHandle::current() const
+{
+    return (d->modificationTime.isValid() &&
+            lastModified().isValid() &&
+            d->modificationTime >= lastModified());
+}
+
+const QDateTime &FileHandle::lastModified() const
+{
+    if(d->lastModified.isNull())
+        d->lastModified = d->fileInfo.lastModified();
+
+    return d->lastModified;
+}
+
+void FileHandle::read(CacheDataStream &s)
+{
+    switch(s.cacheVersion()) {
+    case 1:
+    default:
+        if(!d->tag)
+            d->tag = new Tag(d->absFilePath, true);
+
+        s >> *(d->tag);
+        s >> d->modificationTime;
+        break;
+    }
+}
+
+FileHandle &FileHandle::operator=(const FileHandle &f)
+{
+    if(&f == this)
+        return *this;
+
+    if(d->deref())
+        delete d;
+
+    d = f.d;
+    d->ref();
+
+    return *this;
+}
+
+bool FileHandle::operator==(const FileHandle &f) const
+{
+    return d == f.d;
+}
+
+bool FileHandle::operator!=(const FileHandle &f) const
+{
+    return d != f.d;
+}
+
+QStringList FileHandle::properties() // static
+{
+    return FileHandleProperties::properties();
+}
+
+QString FileHandle::property(const QString &name) const
+{
+    return FileHandleProperties::property(*this, name.latin1());
+}
+
+const FileHandle &FileHandle::null() // static
+{
+    static FileHandle f;
+    return f;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private methods
+////////////////////////////////////////////////////////////////////////////////
+
+void FileHandle::setup(const QFileInfo &info, const QString &path)
+{
+    if(d && !isNull())
+        return;
+
+    QString fileName = path.isNull() ? info.absFilePath() : path;
+
+    FileHandle cached = Cache::instance()->value(resolveSymLinks(fileName));
+
+    if(cached != null()) {
+        d = cached.d;
+        d->ref();
+    }
+    else {
+        d = new FileHandlePrivate;
+        d->fileInfo = info;
+        d->absFilePath = resolveSymLinks(fileName);
+        d->modificationTime = info.lastModified();
+        Cache::instance()->insert(*this);
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// related functions
+////////////////////////////////////////////////////////////////////////////////
+
+QDataStream &operator<<(QDataStream &s, const FileHandle &f)
+{
+    s << *(f.tag())
+      << f.lastModified();
+
+    return s;
+}
+
+CacheDataStream &operator>>(CacheDataStream &s, FileHandle &f)
+{
+    f.read(s);
+    return s;
+}