File indexing completed on 2024-09-15 06:31:08

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2000 Stephan Kulow <coolo@kde.org>
     SPDX-FileCopyrightText: 2000-2009 David Faure <faure@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef KIO_JOB_BASE_H
 #define KIO_JOB_BASE_H
 
 #include <KCompositeJob>
 #include <kio/metadata.h>
 
 namespace KIO
 {
 class JobUiDelegateExtension;
 
 class JobPrivate;
 /**
  * @class KIO::Job job_base.h <KIO/Job>
  *
  * The base class for all jobs.
  * For all jobs created in an application, the code looks like
  *
  * \code
  *   KIO::Job* job = KIO::someoperation(some parameters);
  *   connect(job, &KJob::result, this, &MyClass::slotResult);
  * \endcode
  *   (other connects, specific to the job)
  *
  * And slotResult is usually at least:
  *
  * \code
  * void MyClass::slotResult(KJob *job)
  * {
  *   if (job->error()) {
  *     job->uiDelegate()->showErrorMessage();
  *   }
  * }
  * \endcode
  * @see KIO::Scheduler
  */
 class KIOCORE_EXPORT Job : public KCompositeJob
 {
     Q_OBJECT
 
 protected:
     Job();
     // used also from KIOGui's PreviewJob, so needs to be exported
     explicit Job(JobPrivate &dd);
 
 public:
     ~Job() override;
     void start() override
     {
     } // Since KIO autostarts its jobs
 
     /**
      * Retrieves the UI delegate extension used by this job.
      * @since 5.0
      */
     JobUiDelegateExtension *uiDelegateExtension() const;
 
     /**
      * Sets the UI delegate extension to be used by this job.
      * The default UI delegate extension is KIO::defaultJobUiDelegateExtension()
      */
     void setUiDelegateExtension(JobUiDelegateExtension *extension);
 
 protected:
     /**
      * Abort this job.
      * This kills all subjobs and deletes the job.
      *
      */
     bool doKill() override;
 
     /**
      * Suspend this job
      * @see resume
      */
     bool doSuspend() override;
 
     /**
      * Resume this job
      * @see suspend
      */
     bool doResume() override;
 
 public:
     /**
      * Converts an error code and a non-i18n error message into an
      * error message in the current language. The low level (non-i18n)
      * error message (usually a url) is put into the translated error
      * message using %1.
      *
      * Example for errid == ERR_CANNOT_OPEN_FOR_READING:
      * \code
      *   i18n("Could not read\n%1", errortext);
      * \endcode
      * Use this to display the error yourself, but for a dialog box
      * use uiDelegate()->showErrorMessage(). Do not call it if error()
      * is not 0.
      * @return the error message and if there is no error, a message
      *         telling the user that the app is broken, so check with
      *         error() whether there is an error
      */
     QString errorString() const override;
 
     /**
      * Converts an error code and a non-i18n error message into i18n
      * strings suitable for presentation in a detailed error message box.
      *
      * @param reqUrl the request URL that generated this error message
      * @param method the method that generated this error message
      * (unimplemented)
      * @return the following strings: title, error + description,
      *         causes+solutions
      */
     QStringList detailedErrorStrings(const QUrl *reqUrl = nullptr, int method = -1) const;
 
     /**
      * Set the parent Job.
      * One example use of this is when FileCopyJob calls RenameDialog::open,
      * it must pass the correct progress ID of the parent CopyJob
      * (to hide the progress dialog).
      * You can set the parent job only once. By default a job does not
      * have a parent job.
      * @param parentJob the new parent job
      */
     void setParentJob(Job *parentJob);
 
     /**
      * Returns the parent job, if there is one.
      * @return the parent job, or @c nullptr if there is none
      * @see setParentJob
      */
     Job *parentJob() const;
 
     /**
      * Set meta data to be sent to the worker, replacing existing
      * meta data.
      * @param metaData the meta data to set
      * @see addMetaData()
      * @see mergeMetaData()
      */
     void setMetaData(const KIO::MetaData &metaData);
 
     /**
      * Add key/value pair to the meta data that is sent to the worker.
      * @param key the key of the meta data
      * @param value the value of the meta data
      * @see setMetaData()
      * @see mergeMetaData()
      */
     void addMetaData(const QString &key, const QString &value);
 
     /**
      * Add key/value pairs to the meta data that is sent to the worker.
      * If a certain key already existed, it will be overridden.
      * @param values the meta data to add
      * @see setMetaData()
      * @see mergeMetaData()
      */
     void addMetaData(const QMap<QString, QString> &values);
 
     /**
      * Add key/value pairs to the meta data that is sent to the worker.
      * If a certain key already existed, it will remain unchanged.
      * @param values the meta data to merge
      * @see setMetaData()
      * @see addMetaData()
      */
     void mergeMetaData(const QMap<QString, QString> &values);
 
     /**
      * @internal. For the scheduler. Do not use.
      */
     MetaData outgoingMetaData() const;
 
     /**
      * Get meta data received from the worker.
      * (Valid when first data is received and/or worker is finished)
      * @return the job's meta data
      */
     MetaData metaData() const;
 
     /**
      * Query meta data received from the worker.
      * (Valid when first data is received and/or worker is finished)
      * @param key the key of the meta data to retrieve
      * @return the value of the meta data, or QString() if the
      *         @p key does not exist
      */
     QString queryMetaData(const QString &key);
 
 protected:
 Q_SIGNALS:
     /**
      * Emitted when the worker successfully connected to the host.
      * There is no guarantee the worker will send this, and this is
      * currently unused (in the applications).
      * @param job the job that emitted this signal
      */
     void connected(KIO::Job *job);
 
 protected:
     /**
      * Add a job that has to be finished before a result
      * is emitted. This has obviously to be called before
      * the finish signal is emitted by the worker.
      *
      * @param job the subjob to add
      */
     bool addSubjob(KJob *job) override;
 
     /**
      * Mark a sub job as being done.
      *
      * Note that this does not terminate the parent job, even if @p job
      * is the last subjob.  emitResult must be called to indicate that
      * the job is complete.
      *
      * @param job the subjob to remove
      */
     bool removeSubjob(KJob *job) override;
 
 protected:
     JobPrivate *const d_ptr;
 
 private:
     Q_DECLARE_PRIVATE(Job)
 };
 
 /**
  * Flags for the job properties.
  * Not all flags are supported in all cases. Please see documentation of
  * the calling function!
  * @see JobFlags
  */
 enum JobFlag {
     /**
      * Show the progress info GUI, no Resume and no Overwrite
      */
     DefaultFlags = 0,
 
     /**
      * Hide progress information dialog, i.e.\ don't show a GUI.
      */
     HideProgressInfo = 1,
 
     /**
      * When set, automatically append to the destination file if it exists already.
      * WARNING: this is NOT the builtin support for offering the user to resume a previous
      * partial download. The Resume option is much less used, it allows to append
      * to an existing file.
      * This is used by KIO::put(), KIO::file_copy(), KIO::file_move().
      */
     Resume = 2,
 
     /**
      * When set, automatically overwrite the destination if it exists already.
      * This is used by KIO::rename(), KIO::put(), KIO::file_copy(), KIO::file_move(), KIO::symlink().
      * Otherwise the operation will fail with ERR_FILE_ALREADY_EXIST or ERR_DIR_ALREADY_EXIST.
      */
     Overwrite = 4,
 
     /**
      * When set, notifies the worker that application/job does not want privilege execution.
      * So in case of failure due to insufficient privileges show an error without attempting
      * to run the operation as root first.
      *
      * @since 5.43
      */
     NoPrivilegeExecution = 8,
 };
 /**
  * Stores a combination of #JobFlag values.
  */
 Q_DECLARE_FLAGS(JobFlags, JobFlag)
 Q_DECLARE_OPERATORS_FOR_FLAGS(JobFlags)
 
 enum LoadType { Reload, NoReload };
 
 }
 
 #endif