Rewrite FileDialog in C++ && add setting to force async load timelime.

Also fixes repeat section label and empty space when message is redacted.

Fixes #27

src/controller.cpp

@@ -10,8 +10,8 @@
 
 #include <QClipboard>
 #include <QFile>
+#include <QFileDialog>
 #include <QImage>
-#include <QMimeDatabase>
 
 Controller::Controller(QObject* parent) : QObject(parent) {
   connect(m_connection, &Connection::connected, this, &Controller::connected);
@@ -74,6 +74,20 @@ void Controller::reconnect() {
   m_connection->connectWithToken(userID, token, "");
 }
 
+void Controller::uploadFile(Room* room) {
+  if (!room) return;
+  auto localFile = QFileDialog::getOpenFileUrl(Q_NULLPTR, tr("Save File as"));
+  if (!localFile.isEmpty()) {
+    room->uploadFile(localFile.toString(), localFile, getMIME(localFile));
+    QMetaObject::Connection* const connection = new QMetaObject::Connection;
+    *connection = connect(room, &Room::fileTransferCompleted,
+                          [=](QString id, QUrl localFile, QUrl mxcUrl) {
+                            disconnect(*connection);
+                            postFile(room, localFile, mxcUrl);
+                          });
+  }
+}
+
 void Controller::postFile(Room* room, const QUrl& localFile,
                           const QUrl& mxcUrl) {
   const QString mime = getMIME(localFile);
@@ -90,9 +104,7 @@ void Controller::postFile(Room* room, const QUrl& localFile,
 }
 
 QString Controller::getMIME(const QUrl& fileUrl) const {
-  QMimeDatabase* db = new QMimeDatabase();
-  const QString mime = db->mimeTypeForFile(fileUrl.toLocalFile()).name();
-  delete db;
+  const QString mime = m_db.mimeTypeForFile(fileUrl.toLocalFile()).name();
   return mime;
 }
 
@@ -125,3 +137,11 @@ void Controller::createDirectChat(const QString& userID) {
 void Controller::copyToClipboard(const QString& text) {
   m_clipboard->setText(text);
 }
+
+void Controller::saveFileAs(Room* room, QString eventId) {
+  if (!room) return;
+  auto fileName = QFileDialog::getSaveFileName(
+      Q_NULLPTR, tr("Save File as"), room->fileNameToDownload(eventId));
+  if (!fileName.isEmpty())
+    room->downloadFile(eventId, QUrl::fromLocalFile(fileName));
+}

src/controller.h

@@ -7,6 +7,7 @@
 
 #include <QObject>
 #include <QApplication>
+#include <QMimeDatabase>
 
 using namespace QMatrixClient;
 
@@ -84,11 +85,15 @@ class Controller : public QObject {
 
  private:
   QClipboard* m_clipboard = QApplication::clipboard();
+  QMimeDatabase m_db;
 
   void connected();
   void resync();
   void reconnect();
 
+  QString getMIME(const QUrl& fileUrl) const;
+  void postFile(Room* room, const QUrl& localFile, const QUrl& mxcUrl);
+
  signals:
   void connectionChanged();
   void isLoginChanged();
@@ -99,13 +104,13 @@ class Controller : public QObject {
   void errorOccured();
 
  public slots:
-  void postFile(Room* room, const QUrl& localFile, const QUrl& mxcUrl);
-  QString getMIME(const QUrl& fileUrl) const;
+  void uploadFile(Room* room);
   void forgetRoom(const QString& roomID);
   void joinRoom(const QString& alias);
   void createRoom(const QString& name, const QString& topic);
   void createDirectChat(const QString& userID);
   void copyToClipboard(const QString& text);
+  void saveFileAs(Room* room, QString eventId);
 };
 
 #endif  // CONTROLLER_H