Backport: Bug [#2087]. Fix flickering when inserting primary selection on GTK between

SciTE tabs.
This does not allow primary selection to work between tabs as the tabs are
sharing a single Scintilla and the old primary selection is unclaimed when the
file is changed.
This fix adds a new ReceivedClipboard method which does not try to convert the
selection if received in a different format than asked for. It was the call to
gtk_selection_convert that seemed to cause the flickering. ReceivedClipboard is
only called from SelectionReceiver::ClipboardReceived so only occurs due to a
call to RequestSelection and can not occur because of a selection_received
signal.
ReceivedSelection is left with its complexity in case it is needed for some
other issue although it doesn't appear to be called for drag&drop, for example.

Backport of changeset 7422:22864dcaca0b.

1 files changed, 3 insertions, 1 deletions

diff --git a/gtk/ScintillaGTK.h b/gtk/ScintillaGTK.h
index 27f900455..b87808824 100644
--- a/gtk/ScintillaGTK.h
+++ b/gtk/ScintillaGTK.h
@@ -133,10 +133,12 @@ private:
 	bool OwnPrimarySelection();
 	void ClaimSelection() override;
 	void GetGtkSelectionText(GtkSelectionData *selectionData, SelectionText &selText);
+	void InsertSelection(GtkSelectionData *selectionData);
 public:	// Public for SelectionReceiver
 	GObject *MainObject() const noexcept;
-	void ReceivedSelection(GtkSelectionData *selection_data);
+	void ReceivedClipboard(GtkSelectionData *selection_data) noexcept;
 private:
+	void ReceivedSelection(GtkSelectionData *selection_data);
 	void ReceivedDrop(GtkSelectionData *selection_data);
 	static void GetSelection(GtkSelectionData *selection_data, guint info, SelectionText *text);
 	void StoreOnClipboard(SelectionText *clipText);