scide: code editor / post window - copy using plain text

fixes supercollider#657

editors/sc-ide/widgets/code_editor/editor.cpp

@@ -903,4 +903,13 @@ void GenericCodeEditor::hideMouseCursor()
         QApplication::setOverrideCursor( Qt::BlankCursor );
 }
 
+QMimeData *GenericCodeEditor::createMimeDataFromSelection() const
+{
+    // Here, we bundle up just the plaintext (not HTML, as is the default) of
+    // the editor's selected contents.
+    QMimeData *data = new QMimeData;
+    data->setText(textCursor().selection().toPlainText());
+    return data;
+}
+
 } // namespace ScIDE

editors/sc-ide/widgets/code_editor/editor.hpp

@@ -59,7 +59,7 @@ class GenericCodeEditor : public QPlainTextEdit
     virtual void wheelEvent( QWheelEvent * );
     virtual void dragEnterEvent( QDragEnterEvent * );
     void hideMouseCursor(QKeyEvent *);
-
+    virtual QMimeData *createMimeDataFromSelection() const;
 
 public slots:
     void applySettings( Settings::Manager * );

editors/sc-ide/widgets/post_window.cpp

@@ -33,6 +33,7 @@
 #include <QScrollBar>
 #include <QShortcut>
 #include <QKeyEvent>
+#include <QTextDocumentFragment>
 
 namespace ScIDE {
 
@@ -268,6 +269,15 @@ void PostWindow::mouseDoubleClickEvent(QMouseEvent *e)
     cursor.endEditBlock();
 }
 
+QMimeData *PostWindow::createMimeDataFromSelection() const
+{
+    // Here, we bundle up just the plaintext (not HTML, as is the default) of
+    // the post window's selected contents.
+    QMimeData *data = new QMimeData;
+    data->setText(textCursor().selection().toPlainText());
+    return data;
+}
+
 bool PostWindow::openDocumentation()
 {
     return Main::openDocumentation(symbolUnderCursor());

editors/sc-ide/widgets/post_window.hpp

@@ -77,6 +77,7 @@ public slots:
     virtual void wheelEvent( QWheelEvent * );
     virtual void focusOutEvent (QFocusEvent *e);
     virtual void mouseDoubleClickEvent(QMouseEvent *e);
+    virtual QMimeData *createMimeDataFromSelection() const;
 
 private slots:
     void onAutoScrollTriggered(bool);