TextBufferCommitNotify

A notification callback used by method@Gtk.TextBuffer.add_commit_notify.

You may not modify the class@Gtk.TextBuffer from a callback@Gtk.TextBufferCommitNotify callback and that is enforced by the class@Gtk.TextBuffer API.

callback@Gtk.TextBufferCommitNotify may be used to be notified about changes to the underlying buffer right before-or-after the changes are committed to the underlying B-Tree. This is useful if you want to observe changes to the buffer without other signal handlers potentially modifying state on the way to the default signal handler.

When @flags is GTK_TEXT_BUFFER_NOTIFY_BEFORE_INSERT, position is set to the offset in characters from the start of the buffer where the insertion will occur. length is set to the number of characters to be inserted. You may not yet retrieve the text until it has been inserted. You may access the text from GTK_TEXT_BUFFER_NOTIFY_AFTER_INSERT using method@Gtk.TextBuffer.get_slice.

When @flags is GTK_TEXT_BUFFER_NOTIFY_AFTER_INSERT, position is set to offset in characters where the insertion occurred and length is set to the number of characters inserted.

When @flags is GTK_TEXT_BUFFER_NOTIFY_BEFORE_DELETE, position is set to offset in characters where the deletion will occur and length is set to the number of characters that will be removed. You may still retrieve the text from this handler using position and length.

When @flags is GTK_TEXT_BUFFER_NOTIFY_AFTER_DELETE, length is set to zero to denote that the delete-range has already been committed to the underlying B-Tree. You may no longer retrieve the text that has been deleted from the class@Gtk.TextBuffer.

• param buffer the text buffer being notified

• param flags the type of commit notification

• param position the position of the text operation

• param length the length of the text operation in characters