gtk- Binding to the Gtk+ graphical user interface library.

Portabilityportable (depends on GHC)
Safe HaskellSafe-Infered




A position in the buffer preserved across buffer modifications



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 TextMark is like a bookmark in a text buffer; it preserves a position in the text. You can convert the mark to an iterator using textBufferGetIterAtMark. 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.

Marks can be deleted from the buffer at any time with textBufferDeleteMark. Once deleted from the buffer, a mark is essentially useless.

Marks optionally have names; these can be convenient to avoid passing the TextMark object around.

Marks are typically created using the textBufferCreateMark function.

Class Hierarchy

 | GObject
 | +----TextMark


type MarkName = StringSource

The name of a mark.




:: Maybe MarkName

markName - name for mark, or Nothing

-> Bool

leftGravity - whether the mark has left gravity

-> IO TextMark 

Creates a text mark. Add it to a buffer using textBufferAddMark. If name is Nothing, the mark is anonymous; otherwise, the mark can be retrieved by this name using textBufferGetMark. 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 (leftGravity = 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).

  • Available since Gtk+ version 2.12


textMarkSetVisible :: TextMarkClass self => self -> Bool -> IO ()Source

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.

textMarkGetVisible :: TextMarkClass self => self -> IO BoolSource

Returns True if the mark is visible (i.e. a cursor is displayed for it)

textMarkGetDeleted :: TextMarkClass self => self -> IO BoolSource

Returns True if the mark has been removed from its buffer with textBufferDeleteMark. Marks can't be used once deleted.

textMarkGetName :: TextMarkClass self => self -> IO (Maybe MarkName)Source

Returns the mark name; returns Nothing for anonymous marks.

textMarkGetBuffer :: TextMarkClass self => self -> IO (Maybe TextBuffer)Source

Gets the buffer this mark is located inside, or Nothing if the mark is deleted.

textMarkGetLeftGravity :: TextMarkClass self => self -> IO BoolSource

Determines whether the mark has left gravity.

The name is misleading as Arabic, Hebrew and some other languages have the beginning of a line towards the right.


textMarkVisible :: TextMarkClass self => Attr self BoolSource

The 'visible' property. See textMarkGetVisible and textMarkSetVisible