gtk4

Struct TextTagTable

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pub struct TextTagTable { /* private fields */ }
Expand description

The collection of tags in a TextBuffer

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.

§GtkTextTagTables as GtkBuildable

The TextTagTable implementation of the Buildable interface supports adding tags by specifying “tag” as the “type” attribute of a <child> element.

An example of a UI definition fragment specifying tags:

<object class="GtkTextTagTable">
 <child type="tag">
   <object class="GtkTextTag"/>
 </child>
</object>

§Signals

§tag-added

Emitted every time a new tag is added in the TextTagTable.

§tag-changed

Emitted every time a tag in the TextTagTable changes.

§tag-removed

Emitted every time a tag is removed from the TextTagTable.

The @tag is still valid by the time the signal is emitted, but it is not associated with a tag table any more.

§Implements

[trait@glib::ObjectExt], BuildableExt

GLib type: GObject with reference counted clone semantics.

Implementations§

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impl TextTagTable

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pub fn new() -> TextTagTable

Creates a new TextTagTable.

The table contains no tags by default.

§Returns

a new TextTagTable

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pub fn add(&self, tag: &impl IsA<TextTag>) -> bool

Add a tag to the table.

The tag is assigned the highest priority in the table.

@tag must not be in a tag table already, and may not have the same name as an already-added tag.

§tag

a TextTag

§Returns

true on success.

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pub fn foreach<P: FnMut(&TextTag)>(&self, func: P)

Calls @func on each tag in @self, with user data @data.

Note that the table may not be modified while iterating over it (you can’t add/remove tags).

§func

a function to call on each tag

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pub fn size(&self) -> i32

Returns the size of the table (number of tags)

§Returns

number of tags in @self

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pub fn lookup(&self, name: &str) -> Option<TextTag>

Look up a named tag.

§name

name of a tag

§Returns

The tag

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pub fn remove(&self, tag: &impl IsA<TextTag>)

Remove a tag from the table.

If a TextBuffer has @self as its tag table, the tag is removed from the buffer. The table’s reference to the tag is removed, so the tag will end up destroyed if you don’t have a reference to it.

§tag

a TextTag

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pub fn connect_tag_added<F: Fn(&Self, &TextTag) + 'static>( &self, f: F, ) -> SignalHandlerId

Emitted every time a new tag is added in the TextTagTable.

§tag

the added tag.

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pub fn connect_tag_changed<F: Fn(&Self, &TextTag, bool) + 'static>( &self, f: F, ) -> SignalHandlerId

Emitted every time a tag in the TextTagTable changes.

§tag

the changed tag.

§size_changed

whether the change affects the TextView layout.

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pub fn connect_tag_removed<F: Fn(&Self, &TextTag) + 'static>( &self, f: F, ) -> SignalHandlerId

Emitted every time a tag is removed from the TextTagTable.

The @tag is still valid by the time the signal is emitted, but it is not associated with a tag table any more.

§tag

the removed tag.

Trait Implementations§

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impl Clone for TextTagTable

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fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TextTagTable

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for TextTagTable

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl HasParamSpec for TextTagTable

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type ParamSpec = ParamSpecObject

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type SetValue = TextTagTable

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, TextTagTable>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for TextTagTable

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fn hash<H>(&self, state: &mut H)
where H: Hasher,

Hashes the memory address of this object.

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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for TextTagTable

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fn cmp(&self, other: &Self) -> Ordering

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl ParentClassIs for TextTagTable

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impl<OT: ObjectType> PartialEq<OT> for TextTagTable

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fn eq(&self, other: &OT) -> bool

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<OT: ObjectType> PartialOrd<OT> for TextTagTable

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fn partial_cmp(&self, other: &OT) -> Option<Ordering>

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for TextTagTable

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for TextTagTable

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impl IsA<Buildable> for TextTagTable

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impl<O> GObjectPropertyExpressionExt for O
where O: IsA<Object>,

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fn property_expression(&self, property_name: &str) -> PropertyExpression

Create an expression looking up an object’s property.
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fn property_expression_weak(&self, property_name: &str) -> PropertyExpression

Create an expression looking up an object’s property with a weak reference.
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fn this_expression(property_name: &str) -> PropertyExpression

Create an expression looking up a property in the bound this object.
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Returns the class of the object.
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Sets the property property_name of the object to value value. Read more
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Sets the property property_name of the object to value value. Read more
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fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more
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Sets multiple properties of the object at once. Read more
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fn property<V>(&self, property_name: &str) -> V
where V: for<'b> FromValue<'b> + 'static,

Gets the property property_name of the object and cast it to the type V. Read more
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fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more
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fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more
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Get the type of the property property_name of this object. Read more
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fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.
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fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.
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fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more
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unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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Retrieve previously set arbitrary data of this object with the given key. Read more
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fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more
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Unblock a given signal handler.
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Stop emission of the currently emitted signal.
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Stop emission of the currently emitted signal by the (possibly detailed) signal name.
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fn connect<F>( &self, signal_name: &str, after: bool, callback: F, ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_name on this object. Read more
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Connect to the signal signal_name on this object. Read more
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Connect to the signal signal_id on this object. Read more
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unsafe fn connect_unsafe<F>( &self, signal_name: &str, after: bool, callback: F, ) -> SignalHandlerId
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Connect to the signal signal_name on this object. Read more
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unsafe fn connect_unsafe_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F, ) -> SignalHandlerId
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Connect to the signal signal_id on this object. Read more
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Connect a closure to the signal signal_name on this object. Read more
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Connect a closure to the signal signal_id on this object. Read more
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fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures.
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Emit signal by signal id. Read more
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Emit signal by its name. Read more
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Emit signal by its name with details. Read more
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Emit signal by its name with details. Read more
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Emit signal by signal id with details. Read more
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Emit signal by signal id with details. Read more
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fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
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fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + Send + Sync + 'static,

Connect to the notify signal of the object. Read more
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fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + 'static,

Connect to the notify signal of the object. Read more
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unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F, ) -> SignalHandlerId
where F: Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more
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fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more
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fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more
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fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.
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fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + Send + 'static,

Add a callback to be notified when the Object is disposed.
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fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + 'static,

Add a callback to be notified when the Object is disposed. Read more
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fn bind_property<'a, 'f, 't, O>( &'a self, source_property: &'a str, target: &'a O, target_property: &'a str, ) -> BindingBuilder<'a, 'f, 't>
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Bind property source_property on this object to the target_property on the target object. Read more
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fn ref_count(&self) -> u32

Returns the strong reference count of this object.
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Runs the dispose mechanism of the object. Read more
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impl<T> Property for T
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type Value = T

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type Value = T

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Ensures that the type has been registered with the type system.
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The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

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type Error = Infallible

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Performs the conversion.
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The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<'a, T, C, E> FromValueOptional<'a> for T
where T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,

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impl<Super, Sub> MayDowncastTo<Sub> for Super
where Super: IsA<Super>, Sub: IsA<Super>,