Struct pango::Item

#[repr(transparent)]
pub struct Item { /* private fields */ }

The Item structure stores information about a segment of text.

You typically obtain PangoItems by itemizing a piece of text with itemize().

Implementations

impl Item

pub fn new() -> Item

Creates a new Item structure initialized to default values.

Returns

the newly allocated Item, which should be freed with Pango::Item::free().

pub fn apply_attrs(&mut self, iter: &mut AttrIterator)

Available on crate feature v1_44 only.

Add attributes to a Item.

The idea is that you have attributes that don’t affect itemization, such as font features, so you filter them out using AttrList::filter(), itemize your text, then reapply the attributes to the resulting items using this function.

The @iter should be positioned before the range of the item, and will be advanced past it. This function is meant to be called in a loop over the items resulting from itemization, while passing the iter to each call.

iter

a AttrIterator

pub fn split(&mut self, split_index: i32, split_offset: i32) -> Option<Item>

Modifies @self to cover only the text after @split_index, and returns a new item that covers the text before @split_index that used to be in @self.

You can think of @split_index as the length of the returned item. @split_index may not be 0, and it may not be greater than or equal to the length of @self (that is, there must be at least one byte assigned to each item, you can’t create a zero-length item). @split_offset is the length of the first item in chars, and must be provided because the text used to generate the item isn’t available, so pango_item_split() can’t count the char length of the split items itself.

split_index

byte index of position to split item, relative to the start of the item

split_offset

number of chars between start of @self and @split_index

Returns

new item representing text before @split_index, which should be freed with Pango::Item::free().

impl Item

pub fn offset(&self) -> i32

pub fn length(&self) -> i32

pub fn num_chars(&self) -> i32

pub fn analysis(&self) -> &Analysis

Trait Implementations

impl Clone for Item

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Item

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

Formats the value using the given formatter.

impl Default for Item

fn default() -> Self

Returns the “default value” for a type.

impl Hash for Item

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl Ord for Item

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Item> for Item

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Item> for Item

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

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for Item

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for Item

impl StructuralEq for Item

impl StructuralPartialEq for Item