qresource.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

QStringList QResourceInfo::children() const
{
    if(!container || related.isEmpty())
        return QStringList();

    if(!hasChildren) {
        hasChildren = true;
        QString path = searchFile;
        if(path.startsWith(QLatin1Char(':')))
            path = path.mid(1);
        QSet<QString> kids;
        for(int i = 0; i < related.size(); ++i) {
            QStringList related_children = related.at(i).children(path);
            for(int kid = 0; kid < related_children.size(); ++kid) {
                QString k = related_children.at(kid);
                if(!kids.contains(k)) {
                    mChildren += k;
                    kids.insert(k);
                }
            }
        }
    }
    return mChildren;
}

Q_CORE_EXPORT bool qRegisterResourceData(int version, const unsigned char *tree,
                                         const unsigned char *name, const unsigned char *data)
{
    if(version == 0x01 && resourceList()) {
        QResource res(tree, name, data);
        if (!resourceList()->contains(res))
            resourceList()->append(res);
        return true;
    }
    return false;
}

Q_CORE_EXPORT bool qUnregisterResourceData(int version, const unsigned char *tree,
                                           const unsigned char *name, const unsigned char *data)
{
    if(version == 0x01 && resourceList()) {
        QResource res(tree, name, data);
        for(int i = 0; i < resourceList()->size(); ) {
            if(resourceList()->at(i) == res)
                resourceList()->remove(i);
            else
                ++i;
        }
        return true;
    }
    return false;
}

//file type handler
class QResourceFileEngineHandler : public QAbstractFileEngineHandler
{
public:
    QResourceFileEngineHandler() { }
    ~QResourceFileEngineHandler() { }
    QAbstractFileEngine *create(const QString &path) const;
};
QAbstractFileEngine *QResourceFileEngineHandler::create(const QString &path) const
{
    if (path.size() > 0 && path.startsWith(QLatin1Char(':')))
        return new QResourceFileEngine(path);
    return 0;
}

//resource engine
class QResourceFileEnginePrivate : public QAbstractFileEnginePrivate
{
protected:
    Q_DECLARE_PUBLIC(QResourceFileEngine)
private:
    qint64 offset;
    QResourceInfo resource;
protected:
    QResourceFileEnginePrivate() : offset(0) { }
};

bool QResourceFileEngine::mkdir(const QString &, bool) const
{
    return false;
}

bool QResourceFileEngine::rmdir(const QString &, bool) const
{
    return false;
}

bool QResourceFileEngine::setSize(qint64)
{
    return false;
}

QStringList QResourceFileEngine::entryList(QDir::Filters filters, const QStringList &filterNames) const
{
    Q_D(const QResourceFileEngine);

    const bool doDirs     = (filters & QDir::Dirs) != 0;
    const bool doFiles    = (filters & QDir::Files) != 0;
    const bool doReadable = (filters & QDir::Readable) != 0;

    QStringList ret;
    if((!doDirs && !doFiles) || ((filters & QDir::PermissionMask) && !doReadable))
        return ret;
    if(!d->resource.exists() || !d->resource.isContainer())
        return ret; // cannot read the "directory"

    QStringList entries = d->resource.children();
    for(int i = 0; i < entries.size(); i++) {
        QResourceInfo entry(d->resource.fileName() + "/" + entries[i]);
#ifndef QT_NO_REGEXP
        if(!(filters & QDir::AllDirs && entry.isContainer())) {
            bool matched = false;
            for(QStringList::ConstIterator sit = filterNames.begin(); sit != filterNames.end(); ++sit) {
                QRegExp rx(*sit,
                           (filters & QDir::CaseSensitive) ? Qt::CaseSensitive : Qt::CaseInsensitive,
                           QRegExp::Wildcard);
                if (rx.exactMatch(entries[i])) {
                    matched = true;
                    break;
                }
            }
            if(!matched)
                continue;
        }
#endif
        if  ((doDirs && entry.isContainer()) ||
             (doFiles && !entry.isContainer()))
            ret.append(entries[i]);
    }
    return ret;
}

bool QResourceFileEngine::caseSensitive() const
{
    return true;
}

QResourceFileEngine::QResourceFileEngine(const QString &file) :
    QAbstractFileEngine(*new QResourceFileEnginePrivate)
{
    Q_D(QResourceFileEngine);
    d->resource.setFileName(file);
}

QResourceFileEngine::~QResourceFileEngine()
{
}

void QResourceFileEngine::setFileName(const QString &file)
{
    Q_D(QResourceFileEngine);
    d->resource.setFileName(file);
}

bool QResourceFileEngine::open(QIODevice::OpenMode flags)
{
    Q_D(QResourceFileEngine);
    if (d->resource.fileName().isEmpty()) {
        qWarning("QFSFileEngine::open: No file name specified");
        return false;
    }
    if(flags & QIODevice::WriteOnly)
        return false;
    if(!d->resource.exists())
       return false;
    return true;
}

bool QResourceFileEngine::close()
{
    Q_D(QResourceFileEngine);
    d->offset = 0;
    return true;
}

bool QResourceFileEngine::flush()
{
    return false;
}

qint64 QResourceFileEngine::read(char *data, qint64 len)
{
    Q_D(QResourceFileEngine);
    if(len > d->resource.data().size()-d->offset)
        len = d->resource.data().size()-d->offset;
    if(len <= 0)
        return 0;
    memcpy(data, d->resource.data().constData()+d->offset, len);
    d->offset += len;
    return len;
}

qint64 QResourceFileEngine::write(const char *, qint64)
{
    return -1;
}

bool QResourceFileEngine::remove()
{
    return false;
}

bool QResourceFileEngine::copy(const QString &)
{
    return false;
}

bool QResourceFileEngine::rename(const QString &)
{
    return false;
}

bool QResourceFileEngine::link(const QString &)
{
    return false;
}

qint64 QResourceFileEngine::size() const
{
    Q_D(const QResourceFileEngine);
    if(!d->resource.exists())
        return 0;
    return d->resource.data().size();
}

qint64 QResourceFileEngine::pos() const
{
    Q_D(const QResourceFileEngine);
    return d->offset;
}

bool QResourceFileEngine::atEnd() const
{
    Q_D(const QResourceFileEngine);
    if(!d->resource.exists())
        return true;
    return d->offset == d->resource.data().size();
}

bool QResourceFileEngine::seek(qint64 pos)
{
    Q_D(QResourceFileEngine);
    if(!d->resource.exists())
        return false;

    if(d->offset > d->resource.data().size())
        return false;
    d->offset = pos;
    return true;
}

bool QResourceFileEngine::isSequential() const
{
    return false;
}

QAbstractFileEngine::FileFlags QResourceFileEngine::fileFlags(QAbstractFileEngine::FileFlags type) const
{
    Q_D(const QResourceFileEngine);
    QAbstractFileEngine::FileFlags ret = 0;
    if(!d->resource.exists())
        return ret;
    if(type & PermsMask)
        ret |= QAbstractFileEngine::FileFlags(ReadOwnerPerm|ReadUserPerm|ReadGroupPerm|ReadOtherPerm);
    if(type & TypesMask) {
        if(d->resource.isContainer())
            ret |= DirectoryType;
        else
            ret |= FileType;
    }
    if(type & FlagsMask) {
        ret |= ExistsFlag;
        if(d->resource.fileName() == QLatin1String(":/"))
            ret |= RootFlag;
    }
    return ret;
}

bool QResourceFileEngine::setPermissions(uint)
{
    return false;
}

QString QResourceFileEngine::fileName(FileName file) const
{
    Q_D(const QResourceFileEngine);
    if(file == BaseName) {
	int slash = d->resource.fileName().lastIndexOf(QLatin1Char('/'));
	if (slash == -1)
	    return d->resource.fileName();
	return d->resource.fileName().mid(slash + 1);
    } else if(file == PathName || file == AbsolutePathName) {
	const int slash = d->resource.fileName().lastIndexOf(QLatin1Char('/'));
	if (slash != -1)
	    return d->resource.fileName().left(slash);
    } else if(file == CanonicalName || file == CanonicalPathName) {
        const QString canonicalPath = d->resource.searchFileName();
        if(file == CanonicalPathName) {
            const int slash = canonicalPath.lastIndexOf(QLatin1Char('/'));
            if (slash != -1)
                return canonicalPath.left(slash);
        }
        return canonicalPath;
    }
    return d->resource.fileName();
}

bool QResourceFileEngine::isRelativePath() const
{
    return false;
}

uint QResourceFileEngine::ownerId(FileOwner) const
{
    static const uint nobodyID = (uint) -2;
    return nobodyID;
}

QString QResourceFileEngine::owner(FileOwner) const
{
    return QString();
}

QDateTime QResourceFileEngine::fileTime(FileTime) const
{
    return QDateTime();
}

bool QResourceFileEngine::extension(Extension extension, const ExtensionOption *option, ExtensionReturn *output)
{
    Q_UNUSED(extension);
    Q_UNUSED(option);
    Q_UNUSED(output);
    return false;
}

bool QResourceFileEngine::supportsExtension(Extension extension) const
{
    Q_UNUSED(extension);
    return false;
}

//Initialization and cleanup
Q_GLOBAL_STATIC(QResourceFileEngineHandler, resource_file_handler)

static int qt_force_resource_init() { resource_file_handler(); return 1; }
Q_CORE_EXPORT void qInitResourceIO() { resource_file_handler(); }
static int qt_forced_resource_init = qt_force_resource_init();
Q_CONSTRUCTOR_FUNCTION(qt_force_resource_init)