pub struct TextMark { /* private fields */ }
Expand description
A TextMark
is a position in a GtkTextbuffer
that is preserved
across 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
TextBufferExt::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.
Note that “left” and “right” here refer to logical direction (left is the toward the start of the buffer); in some languages such as Hebrew the logically-leftmost text is not actually on the left when displayed.
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 TextBufferExt::delete_mark()
. 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 TextBufferExt::create_mark()
function.
§Properties
§left-gravity
Whether the mark has left gravity.
When text is inserted at the mark’s current location, if the mark has left gravity it will be moved to the left of the newly-inserted text, otherwise to the right.
Readable | Writeable | Construct Only
§name
The name of the mark or None
if the mark is anonymous.
Readable | Writeable | Construct Only
§Implements
TextMarkExt
, [trait@glib::ObjectExt
]
GLib type: GObject with reference counted clone semantics.
Implementations§
Source§impl TextMark
impl TextMark
pub const NONE: Option<&'static TextMark> = None
Sourcepub fn new(name: Option<&str>, left_gravity: bool) -> TextMark
pub fn new(name: Option<&str>, left_gravity: bool) -> TextMark
Creates a text mark.
Add it to a buffer using TextBufferExt::add_mark()
.
If @name is None
, the mark is anonymous; otherwise, the mark can be
retrieved by name using TextBufferExt::mark()
. 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).
§name
mark name
§left_gravity
whether the mark should have left gravity
§Returns
new TextMark
Sourcepub fn builder() -> TextMarkBuilder
pub fn builder() -> TextMarkBuilder
Creates a new builder-pattern struct instance to construct TextMark
objects.
This method returns an instance of TextMarkBuilder
which can be used to create TextMark
objects.
Trait Implementations§
Source§impl HasParamSpec for TextMark
impl HasParamSpec for TextMark
Source§impl Ord for TextMark
impl Ord for TextMark
Source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl<OT: ObjectType> PartialEq<OT> for TextMark
impl<OT: ObjectType> PartialEq<OT> for TextMark
Source§impl<OT: ObjectType> PartialOrd<OT> for TextMark
impl<OT: ObjectType> PartialOrd<OT> for TextMark
Source§impl StaticType for TextMark
impl StaticType for TextMark
Source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for TextMark
Auto Trait Implementations§
impl Freeze for TextMark
impl RefUnwindSafe for TextMark
impl !Send for TextMark
impl !Sync for TextMark
impl Unpin for TextMark
impl UnwindSafe for TextMark
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