qt: Support decryption (with verification) directly to/from files

* lang/qt/src/Makefile.am: Add new files.
* lang/qt/src/job.cpp (DecryptVerifyJob): Move definition of constructor
and destructor and inclusion of the moc file to the corresponding .cpp
file.
* lang/qt/src/decryptverifyjob.cpp: New.
* lang/qt/src/decryptverifyjob.h (DecryptVerifyJob): Add member
functions setInputFile, inputFile, setOutputFile, outputFile.
* lang/qt/src/decryptverifyjob_p.h: New.
* lang/qt/src/qgpgmedecryptverifyjob.cpp (class
QGpgMEDecryptVerifyJobPrivate): New.
(QGpgMEDecryptVerifyJob::QGpgMEDecryptVerifyJob): Instantiate private
job class.
(decrypt_verify_from_filename): New.

* lang/qt/tests/Makefile.am: Add new test program.
* lang/qt/tests/run-decryptverifyjob.cpp: New.
--

This makes it possible to tell gpg to read the input and write the
output directly to a specified file bypassing GpgME's Data IO when
decrypting (and verifying) a file.

GnuPG-bug-id: 6550

1 files changed, 29 insertions, 1 deletions

diff --git a/lang/qt/src/decryptverifyjob.h b/lang/qt/src/decryptverifyjob.h
index 8444e4d0..710fc80e 100644
--- a/lang/qt/src/decryptverifyjob.h
+++ b/lang/qt/src/decryptverifyjob.h
@@ -62,6 +62,14 @@ namespace QGpgME
    DecryptVerifyJob instance will have scheduled it's own destruction with
    a call to QObject::deleteLater().
 
+   Alternatively, the job can be started with startIt() after setting
+   an input file and an output file. If the job is started this way then
+   the backend reads the input and writes the output directly from/to the
+   specified input file and output file. In this case the plainText value of
+   the result signal will always be empty. This direct IO mode is currently
+   only supported for OpenPGP. Note that startIt() does not schedule the job's
+   destruction if starting the job failed.
+
    After result() is emitted, the DecryptVerifyJob will schedule it's own
    destruction by calling QObject::deleteLater().
 */
@@ -71,7 +79,27 @@ class QGPGME_EXPORT DecryptVerifyJob : public Job
 protected:
     explicit DecryptVerifyJob(QObject *parent);
 public:
-    ~DecryptVerifyJob();
+    ~DecryptVerifyJob() override;
+
+    /**
+     * Sets the path of the file to decrypt (and verify).
+     *
+     * Used if the job is started with startIt().
+     */
+    void setInputFile(const QString &path);
+    QString inputFile() const;
+
+    /**
+     * Sets the path of the file to write the result to.
+     *
+     * Used if the job is started with startIt().
+     *
+     * \note If a file with this path exists, then the job will fail, i.e. you
+     * need to delete an existing file that shall be overwritten before you
+     * start the job.
+     */
+    void setOutputFile(const QString &path);
+    QString outputFile() const;
 
     /**
        Starts the combined decryption and verification operation.