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Diffstat (limited to 'juk/filehandle.cpp')
| -rw-r--r-- | juk/filehandle.cpp | 298 |
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; +} |