use std::{
cell::RefCell,
collections::{vec_deque::VecDeque, HashMap},
rc::Rc,
};
use futures::Future;
use wasm_bindgen::closure::Closure;
use wasm_bindgen_futures::spawn_local;
use web_sys::{Element, Event, EventTarget};
use enclose::enclose;
use next_tick::NextTick;
pub mod alias;
pub use alias::*;
pub mod builder;
pub use builder::{Builder as AppBuilder, Init, MountType, UrlHandling};
use crate::{
dom_types::{self, El, MessageMapper, Namespace, Node, View},
events, next_tick,
orders::OrdersContainer,
patch, routing,
util::{self, ClosureNew},
websys_bridge,
};
pub enum Effect<Ms, GMs> {
Msg(Ms),
Cmd(Box<dyn Future<Item = Ms, Error = Ms> + 'static>),
GMsg(GMs),
GCmd(Box<dyn Future<Item = GMs, Error = GMs> + 'static>),
}
impl<Ms, GMs> From<Ms> for Effect<Ms, GMs> {
fn from(message: Ms) -> Self {
Effect::Msg(message)
}
}
impl<Ms: 'static, OtherMs: 'static, GMs> MessageMapper<Ms, OtherMs> for Effect<Ms, GMs> {
type SelfWithOtherMs = Effect<OtherMs, GMs>;
fn map_message(self, f: impl FnOnce(Ms) -> OtherMs + 'static + Clone) -> Effect<OtherMs, GMs> {
match self {
Effect::Msg(msg) => Effect::Msg(f(msg)),
Effect::Cmd(cmd) => Effect::Cmd(Box::new(cmd.map(f.clone()).map_err(f))),
Effect::GMsg(g_msg) => Effect::GMsg(g_msg),
Effect::GCmd(g_cmd) => Effect::GCmd(g_cmd),
}
}
}
pub enum ShouldRender {
Render,
ForceRenderNow,
Skip,
}
pub struct Mailbox<Message: 'static> {
func: Rc<dyn Fn(Message)>,
}
impl<Ms> Mailbox<Ms> {
pub fn new(func: impl Fn(Ms) + 'static) -> Self {
Mailbox {
func: Rc::new(func),
}
}
pub fn send(&self, message: Ms) {
(self.func)(message)
}
}
impl<Ms> Clone for Mailbox<Ms> {
fn clone(&self) -> Self {
Mailbox {
func: self.func.clone(),
}
}
}
type StoredPopstate = RefCell<Option<Closure<dyn FnMut(Event)>>>;
pub struct AppData<Ms: 'static, Mdl> {
pub model: RefCell<Option<Mdl>>,
main_el_vdom: RefCell<Option<El<Ms>>>,
pub popstate_closure: StoredPopstate,
pub hashchange_closure: StoredPopstate,
pub routes: RefCell<Option<RoutesFn<Ms>>>,
window_listeners: RefCell<Vec<events::Listener<Ms>>>,
msg_listeners: RefCell<MsgListeners<Ms>>,
scheduled_render_handle: RefCell<Option<util::RequestAnimationFrameHandle>>,
}
pub struct AppCfg<Ms, Mdl, ElC, GMs>
where
Ms: 'static,
Mdl: 'static,
ElC: View<Ms>,
{
document: web_sys::Document,
mount_point: web_sys::Element,
mount_type: RefCell<Option<MountType>>,
pub update: UpdateFn<Ms, Mdl, ElC, GMs>,
pub sink: Option<SinkFn<Ms, Mdl, ElC, GMs>>,
view: ViewFn<Mdl, ElC>,
window_events: Option<WindowEvents<Ms, Mdl>>,
initial_orders: RefCell<Option<OrdersContainer<Ms, Mdl, ElC, GMs>>>,
}
pub struct App<Ms, Mdl, ElC, GMs = ()>
where
Ms: 'static,
Mdl: 'static,
ElC: View<Ms>,
{
pub cfg: Rc<AppCfg<Ms, Mdl, ElC, GMs>>,
pub data: Rc<AppData<Ms, Mdl>>,
}
impl<Ms: 'static, Mdl: 'static, ElC: View<Ms>, GMs> ::std::fmt::Debug for App<Ms, Mdl, ElC, GMs> {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "App")
}
}
impl<Ms, Mdl, ElC: View<Ms> + 'static, GMs: 'static> App<Ms, Mdl, ElC, GMs> {
pub fn build(
init: impl FnOnce(routing::Url, &mut OrdersContainer<Ms, Mdl, ElC, GMs>) -> Init<Mdl> + 'static,
update: UpdateFn<Ms, Mdl, ElC, GMs>,
view: ViewFn<Mdl, ElC>,
) -> AppBuilder<Ms, Mdl, ElC, GMs> {
console_error_panic_hook::set_once();
AppBuilder::new(Box::new(init), update, view)
}
#[allow(clippy::too_many_arguments)]
fn new(
update: UpdateFn<Ms, Mdl, ElC, GMs>,
sink: Option<SinkFn<Ms, Mdl, ElC, GMs>>,
view: ViewFn<Mdl, ElC>,
mount_point: Element,
routes: Option<RoutesFn<Ms>>,
window_events: Option<WindowEvents<Ms, Mdl>>,
) -> Self {
let window = util::window();
let document = window.document().expect("Can't find the window's document");
Self {
cfg: Rc::new(AppCfg {
document,
mount_point,
update,
sink,
view,
window_events,
initial_orders: RefCell::new(None),
mount_type: RefCell::new(None),
}),
data: Rc::new(AppData {
model: RefCell::new(None),
main_el_vdom: RefCell::new(None),
popstate_closure: RefCell::new(None),
hashchange_closure: RefCell::new(None),
routes: RefCell::new(routes),
window_listeners: RefCell::new(Vec::new()),
msg_listeners: RefCell::new(Vec::new()),
scheduled_render_handle: RefCell::new(None),
}),
}
}
pub fn setup_window_listeners(&self) {
if let Some(window_events) = self.cfg.window_events {
let mut new_listeners = (window_events)(self.data.model.borrow().as_ref().unwrap());
patch::setup_window_listeners(
&util::window(),
&mut self.data.window_listeners.borrow_mut(),
&mut new_listeners,
&self.mailbox(),
);
self.data.window_listeners.replace(new_listeners);
}
}
fn bootstrap_vdom(&self) -> El<Ms> {
let mount_type = self.cfg.mount_type.borrow().unwrap_or(MountType::Append);
let mut new = El::empty(dom_types::Tag::Placeholder);
if mount_type == MountType::Takeover {
let mut dom_nodes: El<Ms> = (&self.cfg.mount_point).into();
dom_nodes.strip_ws_nodes_from_self_and_children();
new.children = dom_nodes.children;
}
self.setup_window_listeners();
patch::setup_input_listeners(&mut new);
patch::attach_listeners(&mut new, &self.mailbox());
if mount_type == MountType::Takeover {
websys_bridge::assign_ws_nodes_to_el(&util::document(), &mut new);
while let Some(child) = self.cfg.mount_point.first_child() {
self.cfg
.mount_point
.remove_child(&child)
.expect("No problem removing node from parent.");
}
for child in &mut new.children {
match child {
Node::Element(child_el) => {
websys_bridge::attach_el_and_children(child_el, &self.cfg.mount_point);
patch::attach_listeners(child_el, &self.mailbox());
}
Node::Text(top_child_text) => {
websys_bridge::attach_text_node(top_child_text, &self.cfg.mount_point);
}
Node::Empty => (),
}
}
}
new
}
#[deprecated(
since = "0.4.2",
note = "Please use `AppBuilder.build_and_start` instead"
)]
pub fn run(self) -> Self {
self.data.main_el_vdom.replace(Some(self.bootstrap_vdom()));
if let Some(routes) = *self.data.routes.borrow() {
routing::setup_popstate_listener(
enclose!((self => s) move |msg| s.update(msg)),
enclose!((self => s) move |closure| {
s.data.popstate_closure.replace(Some(closure));
}),
routes,
);
routing::setup_hashchange_listener(
enclose!((self => s) move |msg| s.update(msg)),
enclose!((self => s) move |closure| {
s.data.hashchange_closure.replace(Some(closure));
}),
routes,
);
routing::setup_link_listener(enclose!((self => s) move |msg| s.update(msg)), routes);
}
self.process_cmd_and_msg_queue(
self.cfg
.initial_orders
.replace(None)
.expect("initial_orders should be set in AppBuilder::finish")
.effects,
);
self.rerender_vdom();
self
}
pub fn update(&self, message: Ms) {
let mut queue: VecDeque<Effect<Ms, GMs>> = VecDeque::new();
queue.push_front(message.into());
self.process_cmd_and_msg_queue(queue);
}
pub fn sink(&self, g_msg: GMs) {
let mut queue: VecDeque<Effect<Ms, GMs>> = VecDeque::new();
queue.push_front(Effect::GMsg(g_msg));
self.process_cmd_and_msg_queue(queue);
}
pub fn process_cmd_and_msg_queue(&self, mut queue: VecDeque<Effect<Ms, GMs>>) {
while let Some(effect) = queue.pop_front() {
match effect {
Effect::Msg(msg) => {
let mut new_effects = self.process_queue_message(msg);
queue.append(&mut new_effects);
}
Effect::GMsg(g_msg) => {
let mut new_effects = self.process_queue_global_message(g_msg);
queue.append(&mut new_effects);
}
Effect::Cmd(cmd) => self.process_queue_cmd(cmd),
Effect::GCmd(g_cmd) => self.process_queue_global_cmd(g_cmd),
}
}
}
fn process_queue_message(&self, message: Ms) -> VecDeque<Effect<Ms, GMs>> {
for l in self.data.msg_listeners.borrow().iter() {
(l)(&message)
}
let mut orders = OrdersContainer::new(self.clone());
(self.cfg.update)(
message,
&mut self.data.model.borrow_mut().as_mut().unwrap(),
&mut orders,
);
self.setup_window_listeners();
match orders.should_render {
ShouldRender::Render => self.schedule_render(),
ShouldRender::ForceRenderNow => {
self.cancel_scheduled_render();
self.rerender_vdom();
}
ShouldRender::Skip => (),
};
orders.effects
}
fn process_queue_global_message(&self, g_message: GMs) -> VecDeque<Effect<Ms, GMs>> {
let mut orders = OrdersContainer::new(self.clone());
if let Some(sink) = self.cfg.sink {
sink(
g_message,
&mut self.data.model.borrow_mut().as_mut().unwrap(),
&mut orders,
);
}
self.setup_window_listeners();
match orders.should_render {
ShouldRender::Render => self.schedule_render(),
ShouldRender::ForceRenderNow => {
self.cancel_scheduled_render();
self.rerender_vdom();
}
ShouldRender::Skip => (),
};
orders.effects
}
fn process_queue_cmd(&self, cmd: Box<dyn Future<Item = Ms, Error = Ms>>) {
let lazy_schedule_cmd = enclose!((self => s) move |_| {
spawn_local(cmd.then(move |res| {
let msg_returned_from_effect = res.unwrap_or_else(|err_msg| err_msg);
s.update(msg_returned_from_effect);
Ok(())
}))
});
spawn_local(NextTick::new().map(lazy_schedule_cmd));
}
fn process_queue_global_cmd(&self, g_cmd: Box<dyn Future<Item = GMs, Error = GMs>>) {
let lazy_schedule_cmd = enclose!((self => s) move |_| {
spawn_local(g_cmd.then(move |res| {
let msg_returned_from_effect = res.unwrap_or_else(|err_msg| err_msg);
s.sink(msg_returned_from_effect);
Ok(())
}))
});
spawn_local(NextTick::new().map(lazy_schedule_cmd));
}
fn schedule_render(&self) {
let mut scheduled_render_handle = self.data.scheduled_render_handle.borrow_mut();
if scheduled_render_handle.is_none() {
let cb = Closure::new(enclose!((self => s) move |_| {
s.rerender_vdom();
s.data.scheduled_render_handle.borrow_mut().take();
}));
*scheduled_render_handle = Some(util::request_animation_frame(cb));
}
}
fn cancel_scheduled_render(&self) {
self.data.scheduled_render_handle.borrow_mut().take();
}
fn rerender_vdom(&self) {
let mut new = El::empty(dom_types::Tag::Placeholder);
new.children = (self.cfg.view)(self.data.model.borrow().as_ref().unwrap()).els();
let mut old = self
.data
.main_el_vdom
.borrow_mut()
.take()
.expect("missing main_el_vdom");
patch::detach_listeners(&mut old);
patch::patch_els(
&self.cfg.document,
&self.mailbox(),
&self.clone(),
&self.cfg.mount_point,
old.children.into_iter(),
new.children.iter_mut(),
);
self.data.main_el_vdom.borrow_mut().replace(new);
}
pub fn add_message_listener<F>(&self, listener: F)
where
F: Fn(&Ms) + 'static,
{
self.data
.msg_listeners
.borrow_mut()
.push(Box::new(listener));
}
fn mailbox(&self) -> Mailbox<Ms> {
Mailbox::new(enclose!((self => s) move |message| {
s.update(message);
}))
}
}
impl<Ms, Mdl, ElC: View<Ms>, GMs> Clone for App<Ms, Mdl, ElC, GMs> {
fn clone(&self) -> Self {
Self {
cfg: Rc::clone(&self.cfg),
data: Rc::clone(&self.data),
}
}
}
pub trait _Attrs: PartialEq + ToString {
fn vals(self) -> HashMap<String, String>;
}
pub trait _Style: PartialEq + ToString {
fn vals(self) -> HashMap<String, String>;
}
pub trait _Listener<Ms>: Sized {
fn attach<T: AsRef<EventTarget>>(&mut self, el_ws: &T, mailbox: Mailbox<Ms>);
fn detach<T: AsRef<EventTarget>>(&self, el_ws: &T);
}
pub trait _DomEl<Ms>: Sized + PartialEq + DomElLifecycle {
type Tg: PartialEq + ToString;
type At: _Attrs;
type St: _Style;
type Ls: _Listener<Ms>;
type Tx: PartialEq + ToString + Clone + Default;
fn tag(self) -> Self::Tg;
fn attrs(self) -> Self::At;
fn style(self) -> Self::St;
fn listeners(self) -> Vec<Self::Ls>;
fn text(self) -> Option<Self::Tx>;
fn children(self) -> Vec<Self>;
fn websys_el(self) -> Option<web_sys::Element>;
fn id(self) -> Option<u32>;
fn namespace(self) -> Option<Namespace>;
fn empty(self) -> Self;
fn set_id(&mut self, id: Option<u32>);
fn set_websys_el(&mut self, el: Option<Element>);
}
pub trait DomElLifecycle {
fn did_mount(self) -> Option<Box<dyn FnMut(&Element)>>;
fn did_update(self) -> Option<Box<dyn FnMut(&Element)>>;
fn will_unmount(self) -> Option<Box<dyn FnMut(&Element)>>;
}
#[cfg(test)]
pub mod tests {
use futures::future;
use wasm_bindgen::JsCast;
use wasm_bindgen_test::*;
use web_sys;
use crate as seed;
use crate::{class, prelude::*};
use super::*;
wasm_bindgen_test_configure!(run_in_browser);
#[derive(Clone, Debug)]
enum Msg {}
struct Model {}
fn create_app() -> App<Msg, Model, Node<Msg>> {
App::build(|_,_| Init::new(Model {}), |_, _, _| (), |_| seed::empty())
.mount(util::body())
.finish()
}
fn call_patch(
doc: &web_sys::Document,
parent: &Element,
mailbox: &Mailbox<Msg>,
old_vdom: Node<Msg>,
mut new_vdom: Node<Msg>,
app: &App<Msg, Model, Node<Msg>>,
) -> Node<Msg> {
patch::patch(&doc, old_vdom, &mut new_vdom, parent, None, mailbox, &app);
new_vdom
}
fn iter_nodelist(list: web_sys::NodeList) -> impl Iterator<Item = web_sys::Node> {
(0..list.length()).map(move |i| list.item(i).unwrap())
}
fn iter_child_nodes(node: &web_sys::Node) -> impl Iterator<Item = web_sys::Node> {
iter_nodelist(node.child_nodes())
}
#[wasm_bindgen_test]
fn el_added() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(vdom_el) = vdom.clone() {
let old_ws = vdom_el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
assert_eq!(parent.children().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 0);
vdom = call_patch(&doc, &parent, &mailbox, vdom, div!["text"], &app);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(old_ws.child_nodes().length(), 1);
assert_eq!(
old_ws.first_child().unwrap().text_content().unwrap(),
"text"
);
call_patch(
&doc,
&parent,
&mailbox,
vdom,
div!["text", "more text", vec![li!["even more text"]]],
&app,
);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(old_ws.child_nodes().length(), 3);
assert_eq!(
old_ws
.child_nodes()
.item(0)
.unwrap()
.text_content()
.unwrap(),
"text"
);
assert_eq!(
old_ws
.child_nodes()
.item(1)
.unwrap()
.text_content()
.unwrap(),
"more text"
);
let child3 = old_ws.child_nodes().item(2).unwrap();
assert_eq!(child3.node_name(), "LI");
assert_eq!(child3.text_content().unwrap(), "even more text");
} else {
panic!("Node not Element")
}
}
#[wasm_bindgen_test]
fn el_removed() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(vdom_el) = vdom.clone() {
let old_ws = vdom_el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div!["text", "more text", vec![li!["even more text"]]],
&app,
);
assert_eq!(parent.children().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 3);
let old_child1 = old_ws.child_nodes().item(0).unwrap();
call_patch(&doc, &parent, &mailbox, vdom, div!["text"], &app);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(old_ws.child_nodes().length(), 1);
assert!(old_child1.is_same_node(old_ws.child_nodes().item(0).as_ref()));
}
}
#[wasm_bindgen_test]
fn el_changed() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(el) = vdom.clone() {
let old_ws = el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![span!["hello"], ", ", span!["world"]],
&app,
);
assert_eq!(parent.child_nodes().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 3);
call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![
span![class!["first"], "hello"],
", ",
span![class!["second"], "world"],
],
&app,
);
let child1 = old_ws
.child_nodes()
.item(0)
.unwrap()
.dyn_into::<Element>()
.unwrap();
assert_eq!(child1.get_attribute("class"), Some("first".to_string()));
let child3 = old_ws
.child_nodes()
.item(2)
.unwrap()
.dyn_into::<Element>()
.unwrap();
assert_eq!(child3.get_attribute("class"), Some("second".to_string()));
} else {
panic!("Node not Element")
}
}
#[wasm_bindgen_test]
fn els_changed_correct_order() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = div![];
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(el) = vdom.clone() {
let old_ws = el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
vdom = call_patch(&doc, &parent, &mailbox, vdom, div!["1", a!["2"]], &app);
let html_result = old_ws.clone().dyn_into::<Element>().unwrap().inner_html();
assert_eq!(html_result, "1<a>2</a>");
call_patch(&doc, &parent, &mailbox, vdom, div![a!["A"], "B"], &app);
let html_result = old_ws.dyn_into::<Element>().unwrap().inner_html();
assert_eq!(html_result, "<a>A</a>B");
} else {
panic!("Node not Element")
}
}
#[wasm_bindgen_test]
fn attr_disabled() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(vdom_el) = vdom.clone() {
let old_ws = vdom_el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![button![attrs! { At::Disabled => false.as_at_value() }]],
&app,
);
assert_eq!(parent.child_nodes().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 1);
let button = old_ws
.child_nodes()
.item(0)
.unwrap()
.dyn_into::<Element>()
.unwrap();
assert_eq!(button.has_attribute("disabled"), false);
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![button![attrs! { At::Disabled => true.as_at_value() }]],
&app,
);
let button = old_ws
.child_nodes()
.item(0)
.unwrap()
.dyn_into::<Element>()
.unwrap();
assert_eq!(
button
.get_attribute("disabled")
.expect("button hasn't got attribute `disabled`!"),
""
);
call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![button![attrs! { At::Disabled => false.as_at_value() }]],
&app,
);
let button = old_ws
.child_nodes()
.item(0)
.unwrap()
.dyn_into::<Element>()
.unwrap();
assert_eq!(button.has_attribute("disabled"), false);
} else {
panic!("Node not El")
}
}
#[wasm_bindgen_test]
fn empty_changed_in_front() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(vdom_el) = vdom.clone() {
let old_ws = vdom_el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
assert_eq!(parent.children().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 0);
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![seed::empty(), "b", "c"],
&app,
);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(
iter_child_nodes(&old_ws)
.map(|node| node.text_content().unwrap())
.collect::<Vec<_>>(),
&["b", "c"],
);
call_patch(&doc, &parent, &mailbox, vdom, div!["a", "b", "c"], &app);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(
iter_child_nodes(&old_ws)
.map(|node| node.text_content().unwrap())
.collect::<Vec<_>>(),
&["a", "b", "c"],
);
} else {
panic!("Not Element node")
}
}
#[wasm_bindgen_test]
fn empty_changed_in_the_middle() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = Node::Element(El::empty(seed::dom_types::Tag::Div));
websys_bridge::assign_ws_nodes(&doc, &mut vdom);
if let Node::Element(vdom_el) = vdom.clone() {
let old_ws = vdom_el.node_ws.as_ref().unwrap().clone();
parent.append_child(&old_ws).unwrap();
assert_eq!(parent.children().length(), 1);
assert_eq!(old_ws.child_nodes().length(), 0);
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div!["a", seed::empty(), "c"],
&app,
);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(
iter_child_nodes(&old_ws)
.map(|node| node.text_content().unwrap())
.collect::<Vec<_>>(),
&["a", "c"],
);
call_patch(&doc, &parent, &mailbox, vdom, div!["a", "b", "c"], &app);
assert_eq!(parent.children().length(), 1);
assert!(old_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(
iter_child_nodes(&old_ws)
.map(|node| node.text_content().unwrap())
.collect::<Vec<_>>(),
&["a", "b", "c"],
);
} else {
panic!("Not Element node")
}
}
#[wasm_bindgen_test]
fn root_empty_changed() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = seed::empty();
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div!["a", seed::empty(), "c"],
&app,
);
assert_eq!(parent.children().length(), 1);
if let Node::Element(vdom_el) = vdom {
let el_ws = vdom_el.node_ws.as_ref().expect("el_ws missing");
assert!(el_ws.is_same_node(parent.first_child().as_ref()));
assert_eq!(
iter_child_nodes(&el_ws)
.map(|node| node.text_content().unwrap())
.collect::<Vec<_>>(),
&["a", "c"],
);
} else {
panic!("Node not Element type")
}
}
#[wasm_bindgen_test]
fn root_empty_to_empty() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let old = seed::empty();
call_patch(&doc, &parent, &mailbox, old, seed::empty(), &app);
assert_eq!(parent.children().length(), 0);
}
#[wasm_bindgen_test]
fn text_to_element_to_text() {
let app = create_app();
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = seed::empty();
vdom = call_patch(&doc, &parent, &mailbox, vdom, Node::new_text("abc"), &app);
assert_eq!(parent.child_nodes().length(), 1);
let text = parent
.first_child()
.unwrap()
.dyn_ref::<web_sys::Text>()
.expect("not a Text node")
.clone();
assert_eq!(text.text_content().unwrap(), "abc");
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
span![style!["color" => "red"], "def"],
&app,
);
assert_eq!(parent.child_nodes().length(), 1);
let element = parent
.first_child()
.unwrap()
.dyn_ref::<Element>()
.expect("not an Element node")
.clone();
assert_eq!(&element.tag_name().to_lowercase(), "span");
call_patch(&doc, &parent, &mailbox, vdom, Node::new_text("abc"), &app);
assert_eq!(parent.child_nodes().length(), 1);
let text = parent
.first_child()
.unwrap()
.dyn_ref::<web_sys::Text>()
.expect("not a Text node")
.clone();
assert_eq!(text.text_content().unwrap(), "abc");
}
#[wasm_bindgen_test]
fn lifecycle_hooks() {
let app = create_app();
use std::sync::atomic::{AtomicUsize, Ordering::SeqCst};
let mailbox = Mailbox::new(|_msg: Msg| {});
let doc = util::document();
let parent = doc.create_element("div").unwrap();
let mut vdom = seed::empty();
let node_ref: Rc<RefCell<Option<web_sys::Node>>> = Default::default();
let mount_op_counter: Rc<AtomicUsize> = Default::default();
let update_counter: Rc<AtomicUsize> = Default::default();
let did_mount_func = {
let node_ref = node_ref.clone();
let mount_op_counter = mount_op_counter.clone();
move |node: &web_sys::Node| {
node_ref.borrow_mut().replace(node.clone());
assert_eq!(
mount_op_counter.fetch_add(1, SeqCst),
0,
"did_mount was called more than once"
);
}
};
let did_update_func = {
let update_counter = update_counter.clone();
move |_node: &web_sys::Node| {
update_counter.fetch_add(1, SeqCst);
}
};
let will_unmount_func = {
let node_ref = node_ref.clone();
move |_node: &web_sys::Node| {
node_ref.borrow_mut().take();
assert_eq!(
mount_op_counter.fetch_add(1, SeqCst),
1,
"will_unmount was called more than once"
);
}
};
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![
"a",
did_mount(did_mount_func.clone()),
did_update(did_update_func.clone()),
will_unmount(will_unmount_func.clone()),
],
&app,
);
assert!(
node_ref.borrow().is_some(),
"did_mount wasn't called and should have been"
);
assert_eq!(
update_counter.load(SeqCst),
0,
"did_update was called and shouldn't have been"
);
let first_child = parent.first_child().unwrap();
assert!(node_ref
.borrow()
.as_ref()
.unwrap()
.is_same_node(Some(&first_child)));
vdom = call_patch(
&doc,
&parent,
&mailbox,
vdom,
div![
"a",
attrs! {At::Href => "#"},
did_mount(did_mount_func.clone()),
did_update(did_update_func.clone()),
will_unmount(will_unmount_func.clone()),
],
&app,
);
assert!(
node_ref
.borrow()
.as_ref()
.expect("will_unmount was called early")
.is_same_node(Some(&first_child)),
"node reference changed"
);
assert_eq!(
update_counter.load(SeqCst),
1,
"did_update wasn't called and should have been"
);
call_patch(&doc, &parent, &mailbox, vdom, seed::empty(), &app);
assert!(node_ref.borrow().is_none(), "will_unmount wasn't called");
}
#[wasm_bindgen_test(async)]
fn update_promises() -> impl Future<Item = (), Error = JsValue> {
let (test_value_sender, test_value_receiver) = futures::oneshot::<Counters>();
const MESSAGES_TO_SEND: i32 = 5_000;
const COMMANDS_TO_PERFORM: i32 = 4_000;
#[derive(Default, Copy, Clone, Debug)]
struct Counters {
messages_sent: i32,
commands_scheduled: i32,
messages_received: i32,
commands_performed: i32,
}
#[derive(Default)]
struct Model {
counters: Counters,
test_value_sender: Option<futures::sync::oneshot::Sender<Counters>>,
}
#[derive(Clone)]
enum Msg {
MessageReceived,
CommandPerformed,
Start,
}
fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
orders.skip();
match msg {
Msg::MessageReceived => model.counters.messages_received += 1,
Msg::CommandPerformed => model.counters.commands_performed += 1,
Msg::Start => (),
}
if model.counters.messages_sent < MESSAGES_TO_SEND {
orders.send_msg(Msg::MessageReceived);
model.counters.messages_sent += 1;
}
if model.counters.commands_scheduled < MESSAGES_TO_SEND {
orders.perform_cmd(future::ok(Msg::CommandPerformed));
model.counters.commands_scheduled += 1;
}
if model.counters.messages_received == MESSAGES_TO_SEND
&& model.counters.commands_performed == COMMANDS_TO_PERFORM
{
model
.test_value_sender
.take()
.unwrap()
.send(model.counters)
.unwrap()
}
}
let app = App::build(
|_, _| {
Init::new(Model {
test_value_sender: Some(test_value_sender),
..Default::default()
})
},
update,
|_| seed::empty(),
)
.mount(seed::body())
.finish()
.run();
app.update(Msg::Start);
test_value_receiver
.map(|counters| {
assert_eq!(counters.messages_received, MESSAGES_TO_SEND);
assert_eq!(counters.commands_performed, COMMANDS_TO_PERFORM);
})
.map_err(|_| panic!("test_value_sender.send probably wasn't called!"))
}
}