Timeline: accept dropped items

Dropped files will be attached, dropped text will appear in the
input line.

client/chatroomwidget.cpp

@@ -798,3 +798,17 @@ bool ChatRoomWidget::pendingMarkRead() const
  const auto rm = m_currentRoom->readMarker();
  return rm != m_currentRoom->timelineEdge() && rm->index() < indexToMaybeRead;
 }
+
+void ChatRoomWidget::fileDrop(const QString& url)
+{
+ attachedFileName = QUrl(url).path();
+ m_attachAction->setChecked(true);
+ m_chatEdit->setPlaceholderText(
+ tr("Add a message to the file or just push Enter"));
+ emit showStatusMessage(tr("Attaching %1").arg(attachedFileName));
+}
+
+void ChatRoomWidget::textDrop(const QString& text)
+{
+ m_chatEdit->setText(text);
+}

client/chatroomwidget.h

@@ -77,6 +77,8 @@ class ChatRoomWidget: public QWidget
  void saveFileAs(QString eventId);
  void quote(const QString& htmlText);
  void showMenu(int index, const QString& hoveredLink, bool showingDetails);
+ void fileDrop(const QString& url);
+ void textDrop(const QString& text);
 
  private slots:
  void sendInput();

client/qml/Timeline.qml

@@ -190,6 +190,20 @@ Rectangle {
  ? Qt.ScrollBarAlwaysOff : Qt.ScrollBarAlwaysOn
  style: ScrollViewStyle { transientScrollBars: true }
 
+ DropArea {
+ anchors.fill: parent
+ onEntered: if (!room) { drag.accepted = false }
+ onDropped: {
+ if (drop.hasUrls) {
+ controller.fileDrop(drop.urls)
+ drop.acceptProposedAction()
+ } else if (drop.hasText) {
+ controller.textDrop(drop.text)
+ drop.acceptProposedAction()
+ }
+ }
+ }
+
  ListView {
  id: chatView