Add it to a buffer using gtk.text_buffer.TextBuffer.addMark.
If name is null, the mark is anonymous; otherwise, the mark can be
retrieved by name using gtk.text_buffer.TextBuffer.getMark. If a mark
has left gravity, and text is inserted at the mark’s current location,
the mark will be moved to the left of the newly-inserted text. If the
mark has right gravity (left_gravity = false), the mark will end up
on the right of newly-inserted text. The standard left-to-right cursor
is a mark with right gravity (when you type, the cursor stays on the
right side of the text you’re typing).
Creates a text mark.
Add it to a buffer using gtk.text_buffer.TextBuffer.addMark. If name is null, the mark is anonymous; otherwise, the mark can be retrieved by name using gtk.text_buffer.TextBuffer.getMark. If a mark has left gravity, and text is inserted at the mark’s current location, the mark will be moved to the left of the newly-inserted text. If the mark has right gravity (left_gravity = false), the mark will end up on the right of newly-inserted text. The standard left-to-right cursor is a mark with right gravity (when you type, the cursor stays on the right side of the text you’re typing).