plasma-framework/package.h

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/******************************************************************************
2011-07-08 19:36:29 +02:00
* Copyright 2007-2011 by Aaron Seigo <aseigo@kde.org> *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public License *
* along with this library; see the file COPYING.LIB. If not, write to *
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301, USA. *
*******************************************************************************/
#ifndef PLASMA_PACKAGE_H
#define PLASMA_PACKAGE_H
#include <QtCore/QStringList>
#include <kplugininfo.h>
#include <plasma/plasma.h>
#include <plasma/plasma_export.h>
namespace Plasma
{
/**
* @class Package plasma/package.h <Plasma/Package>
*
* @short object representing an installed Plasma package
*
* Package defines what is in a package and provides easy access to the contents.
*
* To define a package, one might write the following code:
*
@code
Package package;
package.addDirectoryDefinition("images", "pics/", i18n("Images"));
QStringList mimeTypes;
mimeTypes << "image/svg" << "image/png" << "image/jpeg";
package.setMimeTypes("images", mimeTypes);
package.addDirectoryDefinition("scripts", "code/", i18n("Executable Scripts"));
mimeTypes.clear();
mimeTypes << "text/\*";
package.setMimeTypes("scripts", mimeTypes);
package.addFileDefinition("mainscript", "code/main.js", i18n("Main Script File"));
package.setRequired("mainscript", true);
@endcode
* One may also choose to create a subclass of PackageStructure and include the setup
* in the constructor.
*
* Either way, Package creates a self-documenting contract between the packager and
* the application without exposing package internals such as actual on-disk structure
* of the package or requiring that all contents be explicitly known ahead of time.
*
* Subclassing PackageStructure does have provide a number of potential const benefits:
* * the package can be notified of path changes via the virtual pathChanged() method
* * the subclass may implement mechanisms to install and remove packages using the
* virtual installPackage and uninstallPackage methods
* * subclasses can be compiled as plugins for easy re-use
**/
//TODO: write documentation on USING a package
class PackagePrivate;
class PackageStructure;
class PLASMA_EXPORT Package
{
public:
/**
* Default constructor
*
* @arg structure if a NULL pointer is passed in, this will creates an empty (invalid) Package;
* otherwise the structure is allowed to set up the Package's initial layout
* @since 4.6
*/
explicit Package(PackageStructure *structure = 0);
/**
* Copy constructore
* @since 4.6
*/
Package(const Package &other);
~Package();
/**
* Assignment operator
* @since 4.6
*/
Package &operator=(const Package &rhs);
/**
* @return true if all the required components exist
**/
bool isValid() const;
/**
* Sets the path to the root of this package
* @param path and absolute path
* @since 4.3
*/
void setPath(const QString &path);
/**
* @return the path to the root of this particular package
*/
const QString path() const;
/**
* Get the path to a given file based on the key and.an optional filename.
* Example: finding the main script in a scripting package:
* filePath("mainscript")
*
* Example: finding a specific image in the images directory:
* filePath("images", "myimage.png")
*
* @param key the key of the file type to look for,
* @param filename optional name of the file to locate within the package
* @return path to the file on disk. QString() if not found.
**/
QString filePath(const char *key, const QString &filename = QString()) const;
/**
* Get the list of files of a given type.
*
* @param fileType the type of file to look for, as defined in the
* package structure.
* @return list of files by name, suitable for passing to filePath
**/
QStringList entryList(const char *key) const;
/**
* @return user visible name for the given entry
**/
QString name(const char *key) const;
/**
* @return true if the item at path exists and is required
**/
bool isRequired(const char *key) const;
/**
* @return the mimeTypes associated with the path, if any
**/
QStringList mimeTypes(const char *key) const;
/**
* @return the prefix paths inserted between the base path and content entries, in order of priority.
* When searching for a file, all paths will be tried in order.
* @since 4.6
*/
QStringList contentsPrefixPaths() const;
/**
* @return preferred package root. This defaults to plasma/plasmoids/
*/
QString defaultPackageRoot() const;
/**
* @return service prefix used in desktop files. This defaults to plasma-applet-
*/
QString servicePrefix() const;
/**
* @return true if paths/symlinks outside the package itself should be followed.
* By default this is set to false for security reasons.
*/
bool allowExternalPaths() const;
/**
* @return the package metadata object.
*/
KPluginInfo metadata() const;
/**
* @return a SHA1 hash digest of the contents of the package in hexadecimal form
* @since 4.4
*/
QString contentsHash() const;
/**
* Adds a directory to the structure of the package. It is added as
* a not-required element with no associated mimeTypes.
*
* Starting in 4.6, if an entry with the given key
* already exists, the path is added to it as a search alternative.
*
* @param key used as an internal label for this directory
* @param path the path within the package for this directory
* @param name the user visible (translated) name for the directory
**/
void addDirectoryDefinition(const char *key, const QString &path, const QString &name);
/**
* Adds a file to the structure of the package. It is added as
* a not-required element with no associated mimeTypes.
*
* Starting in 4.6, if an entry with the given key
* already exists, the path is added to it as a search alternative.
*
* @param key used as an internal label for this file
* @param path the path within the package for this file
* @param name the user visible (translated) name for the file
**/
void addFileDefinition(const char *key, const QString &path, const QString &name);
/**
* Removes a definition from the structure of the package.
* @since 4.6
* @param key the internal label of the file or directory to remove
*/
void removeDefinition(const char *key);
/**
* Sets whether or not a given part of the structure is required or not.
* The path must already have been added using addDirectoryDefinition
* or addFileDefinition.
*
* @param key the entry within the package
* @param required true if this entry is required, false if not
*/
void setRequired(const char *key, bool required);
/**
* Defines the default mimeTypes for any definitions that do not have
* associated mimeTypes. Handy for packages with only one or predominantly
* one file type.
*
* @param mimeTypes a list of mimeTypes
**/
void setDefaultMimeTypes(QStringList mimeTypes);
/**
* Define mimeTypes for a given part of the structure
* The path must already have been added using addDirectoryDefinition
* or addFileDefinition.
*
* @param key the entry within the package
* @param mimeTypes a list of mimeTypes
**/
void setMimeTypes(const char *key, QStringList mimeTypes);
/**
* Sets the prefixes that all the contents in this package should
* appear under. This defaults to "contents/" and is added automatically
* between the base path and the entries as defined by the package
* structure. Multiple entries can be added.
* In this case each file request will be searched in all prefixes in order,
* and the first found will be returned.
*
* @param prefix paths the directory prefix to use
* @since 4.6
*/
void setContentsPrefixPaths(const QStringList &prefixPaths);
/**
* Sets service prefix.
*/
void setServicePrefix(const QString &servicePrefix);
/**
* Sets whether or not external paths/symlinks can be followed by a package
* @param allow true if paths/symlinks outside of the package should be followed,
* false if they should be rejected.
*/
void setAllowExternalPaths(bool allow);
/**
* Sets preferred package root.
*/
void setDefaultPackageRoot(const QString &packageRoot);
// Content structure description methods
/**
* @return all directories registered as part of this Package's structure
*/
QList<const char*> directories() const;
/**
* @return all directories registered as part of this Package's required structure
*/
QList<const char*> requiredDirectories() const;
/**
* @return all files registered as part of this Package's structure
*/
QList<const char*> files() const;
/**
* @return all files registered as part of this Package's required structure
*/
QList<const char*> requiredFiles() const;
/**
* Installs a package matching this package structure. By default installs a
* native Plasma::Package.
*
* @param archivePath path to the package archive file
* @param packageRoot path to the directory where the package should be
* installed to
* @return true on successful installation, false otherwise
**/
bool installPackage(const QString &archivePath, const QString &packageRoot);
/**
* Uninstalls a package matching this package structure.
*
* @param packageName the name of the package to remove
* @param packageRoot path to the directory where the package should be installed to
* @return true on successful removal of the package, false otherwise
*/
bool uninstallPackage(const QString &packageName, const QString &packageRoot);
private:
QExplicitlySharedDataPointer<PackagePrivate> d;
};
}
Q_DECLARE_METATYPE(Plasma::Package)
#endif