feat: adds VecModel

demo_markdown/docs/combobox/mod.md

@@ -1,7 +1,7 @@
 # Combobox
 
 ```rust demo
-let selected_options = RwSignal::new(vec![]);
+let selected_options = RwSignal::new(None::<String>);
 
 view! {
     <Combobox selected_options>
@@ -17,7 +17,7 @@ view! {
 let selected_options = RwSignal::new(vec![]);
 
 view! {
-    <Combobox selected_options multiselect=true clearable=true>
+    <Combobox selected_options clearable=true>
         <ComboboxOption value="cat" text="Car" />
         <ComboboxOption value="dog" text="Dog" />
     </Combobox>
@@ -30,7 +30,7 @@ view! {
 let selected_options = RwSignal::new(vec![]);
 
 view! {
-    <Combobox selected_options multiselect=true>
+    <Combobox selected_options>
         <ComboboxOption value="cat" text="Car" />
         <ComboboxOption value="dog" text="Dog" />
     </Combobox>

thaw/src/combobox/combobox.rs

@@ -3,13 +3,12 @@ use crate::_aria::use_active_descendant;
 use leptos::{context::Provider, ev, html, prelude::*};
 use std::collections::HashMap;
 use thaw_components::{Binder, Follower, FollowerPlacement, FollowerWidth};
-use thaw_utils::{add_event_listener, mount_style, Model};
+use thaw_utils::{add_event_listener, mount_style, Model, VecModel};
 
 #[component]
 pub fn Combobox(
     #[prop(optional, into)] value: Model<String>,
-    #[prop(optional, into)] selected_options: Model<Vec<String>>,
+    #[prop(optional, into)] selected_options: VecModel<String>,
-    #[prop(optional)] multiselect: bool,
     #[prop(optional)] clearable: bool,
     children: Children,
 ) -> impl IntoView {
@@ -23,7 +22,12 @@ pub fn Combobox(
     let clear_icon_ref = NodeRef::<html::Span>::new();
     let is_show_clear_icon = Memo::new(move |_| {
         if clearable {
-            selected_options.with(|options| !options.is_empty())
+            selected_options.with(|options| match options {
+                (None, None, Some(v)) => !v.is_empty(),
+                (None, Some(v), None) => v.is_some(),
+                (Some(v), None, None) => !v.is_empty(),
+                _ => unreachable!(),
+            })
         } else {
             false
         }
@@ -75,21 +79,24 @@ pub fn Combobox(
 
     let on_input = move |ev| {
         let input_value = event_target_value(&ev);
-        if !multiselect {
+        if selected_options.with_untracked(|options| match options {
-            if selected_options.with_untracked(|options| {
+            (None, None, Some(_)) => false,
-                if let Some(option) = options.first() {
+            (None, Some(v), None) => {
-                    if option != &input_value {
+                if let Some(v) = v.as_ref() {
-                        return true;
+                    v != &input_value
-                    }
+                } else {
-                }
                     false
+                }
+            }
+            (Some(v), None, None) => v != &input_value,
+            _ => unreachable!(),
         }) {
             selected_options.set(vec![]);
         }
-        }
         value.set(input_value);
     };
 
+    let multiselect = selected_options.is_vec();
     let combobox_injection = ComboboxInjection {
         value,
         multiselect,
@@ -103,13 +110,20 @@ pub fn Combobox(
     let on_blur = {
         let active_descendant_controller = active_descendant_controller.clone();
         move |_| {
-            if multiselect {
+            selected_options.with_untracked(|options| match options {
-                value.set(String::new());
+                (None, None, Some(_)) => value.set(String::new()),
-            } else {
+                (None, Some(v), None) => {
-                if selected_options.with_untracked(|options| options.is_empty()) {
+                    if v.is_none() {
-                    value.set(String::new());
+                        value.set(String::new())
                     }
                 }
+                (Some(v), None, None) => {
+                    if v.is_empty() {
+                        value.set(String::new())
+                    }
+                }
+                _ => unreachable!(),
+            });
             active_descendant_controller.blur();
         }
     };
@@ -208,7 +222,7 @@ pub fn Combobox(
 #[derive(Clone, Copy)]
 pub(crate) struct ComboboxInjection {
     value: Model<String>,
-    selected_options: Model<Vec<String>>,
+    selected_options: VecModel<String>,
     options: StoredValue<HashMap<String, (String, String)>>,
     is_show_listbox: RwSignal<bool>,
     pub multiselect: bool,
@@ -229,23 +243,40 @@ impl ComboboxInjection {
     }
 
     pub fn is_selected(&self, value: &String) -> bool {
-        self.selected_options
+        self.selected_options.with(|options| match options {
-            .with(|options| options.contains(value))
+            (None, None, Some(v)) => v.contains(value),
+            (None, Some(v), None) => {
+                if let Some(v) = v.as_ref() {
+                    v == value
+                } else {
+                    false
+                }
+            }
+            (Some(v), None, None) => v == value,
+            _ => unreachable!(),
+        })
     }
 
     pub fn select_option(&self, value: &String, text: &String) {
-        self.selected_options.update(|options| {
+        self.selected_options.update(|options| match options {
-            if self.multiselect {
+            (None, None, Some(v)) => {
-                if let Some(index) = options.iter().position(|v| v == value) {
+                if let Some(index) = v.iter().position(|v| v == value) {
-                    options.remove(index);
+                    v.remove(index);
                     return;
                 }
-                options.push(value.clone());
+                v.push(value.clone());
-            } else {
+            }
-                *options = vec![value.clone()];
+            (None, Some(v), None) => {
+                *v = Some(value.clone());
                 self.value.set(text.clone());
                 self.is_show_listbox.set(false);
             }
+            (Some(v), None, None) => {
+                *v = value.clone();
+                self.value.set(text.clone());
+                self.is_show_listbox.set(false);
+            }
+            _ => unreachable!(),
         });
     }
 }

thaw_utils/src/signals/mod.rs

@@ -5,7 +5,7 @@ mod signal_watch;
 mod stored_maybe_signal;
 
 pub use component_ref::ComponentRef;
-pub use model::{Model, OptionModel};
+pub use model::{Model, OptionModel, VecModel};
 pub use optional_maybe_signal::OptionalMaybeSignal;
 pub use signal_watch::SignalWatch;
 pub use stored_maybe_signal::StoredMaybeSignal;

thaw_utils/src/signals/model.rs

@@ -1,6 +1,8 @@
 mod option_model;
+mod vec_model;
 
 pub use option_model::OptionModel;
+pub use vec_model::VecModel;
 
 use leptos::reactive_graph::{
     computed::Memo,

thaw_utils/src/signals/model/vec_model.rs

@@ -0,0 +1,277 @@
+use leptos::{
+    prelude::Update,
+    reactive_graph::{
+        computed::Memo,
+        signal::{ReadSignal, RwSignal, WriteSignal},
+        traits::{GetUntracked, Set, With, WithUntracked},
+        wrappers::read::Signal,
+    },
+};
+
+pub enum VecModel<T>
+where
+    T: 'static,
+{
+    T(Signal<T>, WriteSignal<T>, Option<WriteSignal<T>>),
+    Option(
+        Signal<Option<T>>,
+        WriteSignal<Option<T>>,
+        Option<WriteSignal<Option<T>>>,
+    ),
+    Vec(
+        Signal<Vec<T>>,
+        WriteSignal<Vec<T>>,
+        Option<WriteSignal<Vec<T>>>,
+    ),
+}
+
+impl<T: Default + Send + Sync> Default for VecModel<T> {
+    fn default() -> Self {
+        Self::new(Default::default())
+    }
+}
+
+impl<T> Clone for VecModel<T> {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl<T> Copy for VecModel<T> {}
+
+impl<T: Send + Sync> VecModel<T> {
+    fn new(value: T) -> Self {
+        Self::new_option(Some(value))
+    }
+
+    fn new_option(value: Option<T>) -> Self {
+        let rw_signal = RwSignal::new(value);
+        rw_signal.into()
+    }
+
+    fn new_vec(value: Vec<T>) -> Self {
+        let rw_signal = RwSignal::new(value);
+        rw_signal.into()
+    }
+
+    pub fn is_vec(&self) -> bool {
+        if let VecModel::Vec(_, _, _) = self {
+            true
+        } else {
+            false
+        }
+    }
+
+    pub fn with<O>(
+        &self,
+        fun: impl FnOnce((Option<&T>, Option<&Option<T>>, Option<&Vec<T>>)) -> O,
+    ) -> O {
+        match self {
+            Self::T(read, _, _) => read.with(|value| fun((Some(value), None, None))),
+            Self::Option(read, _, _) => read.with(|value| fun((None, Some(value), None))),
+            Self::Vec(read, _, _) => read.with(|value| fun((None, None, Some(value)))),
+        }
+    }
+
+    pub fn with_untracked<O>(
+        &self,
+        fun: impl FnOnce((Option<&T>, Option<&Option<T>>, Option<&Vec<T>>)) -> O,
+    ) -> O {
+        match self {
+            Self::T(read, _, _) => read.with_untracked(|value| fun((Some(value), None, None))),
+            Self::Option(read, _, _) => read.with_untracked(|value| fun((None, Some(value), None))),
+            Self::Vec(read, _, _) => read.with_untracked(|value| fun((None, None, Some(value)))),
+        }
+    }
+}
+
+impl<T: Send + Sync + Clone + Default> VecModel<T> {
+    pub fn set(&self, mut value: Vec<T>) {
+        match self {
+            Self::T(read, write, on_write) => {
+                let value = if value.is_empty() {
+                    Default::default()
+                } else {
+                    value.remove(0)
+                };
+
+                write.set(value);
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+            Self::Option(read, write, on_write) => {
+                let value = if value.is_empty() {
+                    None
+                } else {
+                    Some(value.remove(0))
+                };
+                write.set(value);
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+            Self::Vec(read, write, on_write) => {
+                write.set(value);
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+        }
+    }
+
+    pub fn update(
+        &self,
+        fun: impl FnOnce((Option<&mut T>, Option<&mut Option<T>>, Option<&mut Vec<T>>)),
+    ) {
+        match self {
+            Self::T(read, write, on_write) => {
+                write.update(move |write| {
+                    fun((Some(write), None, None));
+                });
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+            Self::Option(read, write, on_write) => {
+                write.update(move |write| {
+                    fun((None, Some(write), None));
+                });
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+            Self::Vec(read, write, on_write) => {
+                write.update(move |write| {
+                    fun((None, None, Some(write)));
+                });
+                if let Some(on_write) = on_write.as_ref() {
+                    on_write.set(read.get_untracked());
+                }
+            }
+        }
+    }
+}
+
+impl<T: Send + Sync> From<T> for VecModel<T> {
+    fn from(value: T) -> Self {
+        Self::new(value)
+    }
+}
+
+impl<T: Send + Sync> From<Option<T>> for VecModel<T> {
+    fn from(value: Option<T>) -> Self {
+        Self::new_option(value)
+    }
+}
+
+impl<T: Send + Sync> From<Vec<T>> for VecModel<T> {
+    fn from(value: Vec<T>) -> Self {
+        Self::new_vec(value)
+    }
+}
+
+impl<T: Send + Sync> From<RwSignal<T>> for VecModel<T> {
+    fn from(rw_signal: RwSignal<T>) -> Self {
+        let (read, write) = rw_signal.split();
+        Self::T(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<RwSignal<Option<T>>> for VecModel<T> {
+    fn from(rw_signal: RwSignal<Option<T>>) -> Self {
+        let (read, write) = rw_signal.split();
+        Self::Option(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<RwSignal<Vec<T>>> for VecModel<T> {
+    fn from(rw_signal: RwSignal<Vec<T>>) -> Self {
+        let (read, write) = rw_signal.split();
+        Self::Vec(read.into(), write, None)
+    }
+}
+
+impl<T> From<(Signal<T>, WriteSignal<T>)> for VecModel<T> {
+    fn from((read, write): (Signal<T>, WriteSignal<T>)) -> Self {
+        Self::T(read, write, None)
+    }
+}
+
+impl<T> From<(Signal<Option<T>>, WriteSignal<Option<T>>)> for VecModel<T> {
+    fn from((read, write): (Signal<Option<T>>, WriteSignal<Option<T>>)) -> Self {
+        Self::Option(read, write, None)
+    }
+}
+
+impl<T> From<(Signal<Vec<T>>, WriteSignal<Vec<T>>)> for VecModel<T> {
+    fn from((read, write): (Signal<Vec<T>>, WriteSignal<Vec<T>>)) -> Self {
+        Self::Vec(read, write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(ReadSignal<T>, WriteSignal<T>)> for VecModel<T> {
+    fn from((read, write): (ReadSignal<T>, WriteSignal<T>)) -> Self {
+        Self::T(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(ReadSignal<Option<T>>, WriteSignal<Option<T>>)> for VecModel<T> {
+    fn from((read, write): (ReadSignal<Option<T>>, WriteSignal<Option<T>>)) -> Self {
+        Self::Option(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(ReadSignal<Vec<T>>, WriteSignal<Vec<T>>)> for VecModel<T> {
+    fn from((read, write): (ReadSignal<Vec<T>>, WriteSignal<Vec<T>>)) -> Self {
+        Self::Vec(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(Memo<T>, WriteSignal<T>)> for VecModel<T> {
+    fn from((read, write): (Memo<T>, WriteSignal<T>)) -> Self {
+        Self::T(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(Memo<Option<T>>, WriteSignal<Option<T>>)> for VecModel<T> {
+    fn from((read, write): (Memo<Option<T>>, WriteSignal<Option<T>>)) -> Self {
+        Self::Option(read.into(), write, None)
+    }
+}
+
+impl<T: Send + Sync> From<(Memo<Vec<T>>, WriteSignal<Vec<T>>)> for VecModel<T> {
+    fn from((read, write): (Memo<Vec<T>>, WriteSignal<Vec<T>>)) -> Self {
+        Self::Vec(read.into(), write, None)
+    }
+}
+
+impl<T: Default + Send + Sync> From<(Option<T>, WriteSignal<T>)> for VecModel<T> {
+    fn from((read, write): (Option<T>, WriteSignal<T>)) -> Self {
+        let mut model = Self::new(read.unwrap_or_default());
+        if let VecModel::T(_, _, on_write) = &mut model {
+            *on_write = Some(write);
+        }
+        model
+    }
+}
+
+impl<T: Default + Send + Sync> From<(Option<Option<T>>, WriteSignal<Option<T>>)> for VecModel<T> {
+    fn from((read, write): (Option<Option<T>>, WriteSignal<Option<T>>)) -> Self {
+        let mut model = Self::new_option(read.unwrap_or_default());
+        if let VecModel::Option(_, _, on_write) = &mut model {
+            *on_write = Some(write);
+        }
+        model
+    }
+}
+
+impl<T: Default + Send + Sync> From<(Option<Vec<T>>, WriteSignal<Vec<T>>)> for VecModel<T> {
+    fn from((read, write): (Option<Vec<T>>, WriteSignal<Vec<T>>)) -> Self {
+        let mut model = Self::new_vec(read.unwrap_or_default());
+        if let VecModel::Vec(_, _, on_write) = &mut model {
+            *on_write = Some(write);
+        }
+        model
+    }
+}