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|
//! Provides some operations to be used on the [`Text`] or [`Rich`].
//!
//! [`Text`]: crate::text::Text
//! [`Rich`]: crate::text::Rich
use crate::core::widget::operation::{self, Operation};
/// Some selected text
pub struct Selection(pub String);
/// Some mutable independent selection field of a [`Text`] or [`Rich`] that can be changed through
/// an operation.
///
/// [`Text`]: crate::text::Text
/// [`Rich`]: crate::text::Rich
pub struct IndependentSelection(pub std::cell::RefCell<bool>);
impl IndependentSelection {
/// Creates a new [`IndependentSelection`] with the given value.
pub fn new(value: bool) -> Self {
Self(std::cell::RefCell::new(value))
}
/// Gets the inner bool value of this [`IndependentSelection`].
pub fn get(&self) -> bool {
*self.0.borrow()
}
}
/// Gets all the currently selected text
pub fn selected() -> impl Operation<String> {
struct CopySelection {
contents: Vec<String>,
}
impl Operation<String> for CopySelection {
fn traverse(
&mut self,
operate: &mut dyn FnMut(&mut dyn Operation<String>),
) {
operate(self);
}
fn custom(
&mut self,
_id: Option<&iced_widget::Id>,
_bounds: iced_widget::core::Rectangle,
_state: &mut dyn std::any::Any,
) {
if let Some(selection) = _state.downcast_ref::<Selection>() {
self.contents.push(selection.0.clone());
}
}
fn finish(&self) -> operation::Outcome<String> {
if !self.contents.is_empty() {
let clipboard =
self.contents.iter().fold(String::new(), |mut str, s| {
if str.is_empty() {
str = s.to_owned();
} else {
str.push('\n');
str.push_str(s);
}
str
});
operation::Outcome::Some(clipboard)
} else {
operation::Outcome::None
}
}
}
CopySelection {
contents: Vec::new(),
}
}
/// Sets all children instances of [`Text`] or [`Rich`] to be globally selectable instead of
/// independently selectable.
///
/// [`Text`]: crate::text::Text
/// [`Rich`]: crate::text::Rich
pub fn global_selection() -> impl Operation {
struct SetGlobalSelection;
impl Operation for SetGlobalSelection {
fn traverse(&mut self, operate: &mut dyn FnMut(&mut dyn Operation)) {
operate(self);
}
fn custom(
&mut self,
_id: Option<&iced_widget::Id>,
_bounds: iced_widget::core::Rectangle,
_state: &mut dyn std::any::Any,
) {
if let Some(selection) =
_state.downcast_mut::<IndependentSelection>()
{
let _ = selection.0.replace(false);
}
}
}
SetGlobalSelection
}
|
