Name
GtkTextMark -- A position in the buffer preserved across buffer modifications
Description
You may wish to begin by reading the text widget
conceptual overview which gives an overview of all the objects and data
types related to the text widget and how they work together.
A GtkTextMark is like a bookmark in a text buffer; it preserves a position in
the text. You can convert the mark to an iterator using
gtk_text_buffer_get_iter_at_mark(). Unlike iterators, marks remain valid across
buffer mutations, because their behavior is defined when text is inserted or
deleted. When text containing a mark is deleted, the mark remains in the
position originally occupied by the deleted text. When text is inserted at a
mark, a mark with left gravity will be moved to the
beginning of the newly-inserted text, and a mark with right
gravity will be moved to the end.
[1]
Marks are reference counted, but the reference count only controls the validity
of the memory; marks can be deleted from the buffer at any time with
gtk_text_buffer_delete_mark(). Once deleted from the buffer, a mark is
essentially useless.
Marks optionally have names; these can be convenient to avoid passing the
GtkTextMark object around.
Marks are typically created using the gtk_text_buffer_create_mark() function.
Details
gtk_text_mark_set_visible ()
Sets the visibility of mark; the insertion point is normally
visible, i.e. you can see it as a vertical bar. Also, the text
widget uses a visible mark to indicate where a drop will occur when
dragging-and-dropping text. Most other marks are not visible.
Marks are not visible by default.
gtk_text_mark_get_visible ()
Returns TRUE if the mark is visible (i.e. a cursor is displayed
for it)
gtk_text_mark_get_deleted ()
Returns TRUE if the mark has been removed from its buffer
with gtk_text_buffer_delete_mark(). Marks can't be used
once deleted.
gtk_text_mark_get_name ()
Returns the mark name; returns NULL for anonymous marks.
gtk_text_mark_get_buffer ()
Gets the buffer this mark is located inside,
or NULL if the mark is deleted.
gtk_text_mark_get_left_gravity ()
Determines whether the mark has left gravity.