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applets_inner.rs
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use button::StyleSheet as ButtonStyleSheet;
use cosmic::iced_style::container::StyleSheet;
use cosmic::widget::{
button, column, container, header_bar, horizontal_space, icon, list_column, row, scrollable,
text, text_input, Column,
};
use cosmic::{
cctk::sctk::reexports::client::protocol::wl_data_device_manager::DndAction,
cosmic_config::{Config, CosmicConfigEntry},
iced::{
alignment::{Horizontal, Vertical},
event::{
self,
wayland::{self},
PlatformSpecific,
},
mouse, overlay, touch,
wayland::actions::{
data_device::{ActionInner, DataFromMimeType, DndIcon},
window::SctkWindowSettings,
},
wayland::data_device::action as data_device_action,
window, Alignment, Color, Length, Point, Rectangle, Size,
},
iced_runtime::{command::platform_specific, core::id::Id, Command},
iced_sctk::commands,
iced_widget::{
core::{
layout, renderer,
widget::{tree, Operation, OperationOutputWrapper, Tree},
Clipboard, Shell, Widget,
},
graphics::image::image_rs::EncodableLayout,
},
theme, Apply, Element,
};
use once_cell::sync::Lazy;
use std::{
borrow::{Borrow, Cow},
fmt::Debug,
mem,
path::{Path, PathBuf},
str::FromStr,
sync::Arc,
};
use crate::{app, pages};
use cosmic_panel_config::CosmicPanelConfig;
use cosmic_settings_page::{self as page, section, Section};
use freedesktop_desktop_entry::DesktopEntry;
use slotmap::SlotMap;
use tracing::error;
const MIME_TYPE: &str = "text/uri-list";
pub type OnDndCommand<'a, Message> = Box<
dyn Fn(
Box<dyn Send + Sync + Fn() -> platform_specific::wayland::data_device::ActionInner>,
) -> Message
+ 'a,
>;
const SPACING: f32 = 8.0;
// radius is 8.0
const DRAG_START_DISTANCE_SQUARED: f32 = 64.0;
pub static APPLET_DND_ICON_ID: Lazy<window::Id> = Lazy::new(window::Id::unique);
pub static ADD_PANEL_APPLET_DIALOGUE_ID: Lazy<window::Id> = Lazy::new(window::Id::unique);
pub struct Page {
pub(crate) available_entries: Vec<Applet<'static>>,
pub(crate) config_helper: Option<Config>,
pub(crate) current_config: Option<CosmicPanelConfig>,
pub(crate) reorder_widget_state: ReorderWidgetState,
pub(crate) search: String,
pub(crate) has_dialog: bool,
}
impl Default for Page {
fn default() -> Self {
let config_helper = CosmicPanelConfig::cosmic_config("Panel").ok();
let current_config = config_helper.as_ref().and_then(|config_helper| {
let panel_config = CosmicPanelConfig::get_entry(config_helper).ok()?;
// If the config is not present, it will be created with the default values and the name will not match
(panel_config.name == "Panel").then_some(panel_config)
});
Self {
available_entries: freedesktop_desktop_entry::Iter::new(
freedesktop_desktop_entry::default_paths(),
)
.filter_map(|p| Applet::try_from(Cow::from(p)).ok())
.collect(),
config_helper,
current_config,
reorder_widget_state: ReorderWidgetState::default(),
search: String::new(),
has_dialog: false,
}
}
}
pub trait AppletsPage {
fn inner(&self) -> &Page;
fn inner_mut(&mut self) -> &mut Page;
}
impl AppletsPage for Page {
fn inner(&self) -> &Page {
self
}
fn inner_mut(&mut self) -> &mut Page {
self
}
}
impl page::Page<crate::pages::Message> for Page {
#[allow(clippy::too_many_lines)]
fn content(
&self,
sections: &mut SlotMap<section::Entity, Section<crate::pages::Message>>,
) -> Option<page::Content> {
Some(vec![
sections.insert(lists::<Page, _>(pages::Message::PanelApplet))
])
}
fn info(&self) -> page::Info {
page::Info::new("panel_applets", "preferences-pop-desktop-dock-symbolic")
// .title(fl!("applets"))
}
}
impl page::AutoBind<crate::pages::Message> for Page {}
#[derive(Clone)]
pub enum Message {
RemoveStart(String),
RemoveCenter(String),
RemoveEnd(String),
DetailStart(String),
DetailCenter(String),
DetailEnd(String),
ReorderStart(Vec<Applet<'static>>),
ReorderCenter(Vec<Applet<'static>>),
ReorderEnd(Vec<Applet<'static>>),
Applets(Vec<Applet<'static>>),
PanelConfig(CosmicPanelConfig),
StartDnd(ReorderWidgetState),
DnDCommand(Arc<Box<dyn Send + Sync + Fn() -> ActionInner>>),
Search(String),
AddApplet(Applet<'static>),
AddAppletDialog,
CloseAppletDialog,
ClosedAppletDialog,
DragAppletDialog,
Save,
Cancel,
}
impl Debug for Message {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Message::ReorderStart(_) => write!(f, "ReorderStart"),
Message::ReorderCenter(_) => write!(f, "ReorderCenter"),
Message::ReorderEnd(_) => write!(f, "ReorderEnd"),
Message::Applets(_) => write!(f, "Applets"),
Message::PanelConfig(_) => write!(f, "PanelConfig"),
Message::StartDnd(_) => write!(f, "StartDnd"),
Message::DnDCommand(_) => write!(f, "DnDCommand"),
Message::Save => write!(f, "ApplyReorder"),
Message::RemoveStart(_) => write!(f, "RemoveStart"),
Message::RemoveCenter(_) => write!(f, "RemoveCenter"),
Message::RemoveEnd(_) => write!(f, "RemoveEnd"),
Message::DetailStart(_) => write!(f, "DetailStart"),
Message::DetailCenter(_) => write!(f, "DetailCenter"),
Message::DetailEnd(_) => write!(f, "DetailEnd"),
Message::Cancel => write!(f, "Cancel"),
Message::Search(_) => write!(f, "Search"),
Message::AddApplet(_) => write!(f, "AddApplet"),
Message::AddAppletDialog => write!(f, "AddAppletDialogue"),
Message::CloseAppletDialog => write!(f, "CloseAppletDialogue"),
Message::DragAppletDialog => write!(f, "DragAppletDialogue"),
Message::ClosedAppletDialog => write!(f, "ClosedAppletDialogue"),
}
}
}
impl Page {
pub fn save(&self) {
let Some(config) = self.current_config.as_ref() else {
error!("No panel config. Failed to save applets.");
return;
};
let Some(helper) = self.config_helper.as_ref() else {
error!("No panel config helper. Failed to save applets.");
return;
};
if let Err(e) = config.write_entry(helper) {
error!("Failed to save applets: {:?}", e);
}
}
#[must_use]
pub fn dnd_icon(&self) -> Element<app::Message> {
Element::from(AppletReorderList::dnd_icon(&self.reorder_widget_state))
}
#[must_use]
#[allow(clippy::too_many_lines)]
pub fn add_applet_view<T: Fn(Message) -> crate::pages::Message + Copy + 'static>(
&self,
msg_map: T,
) -> Element<app::Message> {
let mut list_column = list_column();
let mut has_some = false;
for info in self
.available_entries
.iter()
.filter(|a| a.matches(&self.search))
{
if let Some(config) = self.current_config.as_ref() {
if let Some(center) = config.plugins_center.as_ref() {
if center.iter().any(|a| a.as_str() == info.id.as_ref()) {
continue;
}
}
if let Some(wings) = config.plugins_wings.as_ref() {
if wings
.0
.iter()
.chain(wings.1.iter())
.any(|a| a.as_str() == info.id.as_ref())
{
continue;
}
}
}
has_some = true;
list_column = list_column.add(
row::with_children(vec![
icon::from_name(&*info.icon)
.size(32)
.symbolic(true)
.icon()
.into(),
column::with_capacity(2)
.push(text(info.name.clone()))
.push(text(info.description.clone()).size(10))
.spacing(4.0)
.width(Length::Fill)
.into(),
button(text(fl!("add")))
.style(button::Style::Custom {
active: Box::new(|focused, theme| {
let mut style = theme.active(focused, &button::Style::Text);
style.text_color = Some(theme.cosmic().accent_color().into());
style
}),
disabled: Box::new(|theme| {
let mut style = theme.disabled(&button::Style::Text);
let mut text_color: Color = theme.cosmic().accent_color().into();
text_color.a *= 0.5;
style.text_color = Some(text_color);
style
}),
hovered: Box::new(|focused, theme| {
let mut style = theme.hovered(focused, &theme::Button::Text);
style.text_color = Some(theme.cosmic().accent_color().into());
style
}),
pressed: Box::new(|focused, theme| {
let mut style = theme.pressed(focused, &theme::Button::Text);
style.text_color = Some(theme.cosmic().accent_color().into());
style
}),
})
.padding(8.0)
.on_press(app::Message::PageMessage(msg_map(Message::AddApplet(
info.clone(),
))))
.into(),
])
.padding([0, 32, 0, 32])
.spacing(12)
.align_items(Alignment::Center),
);
}
if !has_some {
list_column = list_column.add(
text(fl!("no-applets-found"))
.width(Length::Fill)
.horizontal_alignment(Horizontal::Center),
);
}
column::with_children(vec![
header_bar()
.title(fl!("add-applet"))
.on_close(app::Message::PageMessage(msg_map(
Message::CloseAppletDialog,
)))
.on_drag(app::Message::PageMessage(msg_map(
Message::DragAppletDialog,
)))
.into(),
container(
scrollable(
column::with_children(vec![
text(fl!("add-applet")).size(24).width(Length::Fill).into(),
text_input::search_input(fl!("search-applets"), &self.search)
.on_input(move |s| {
app::Message::PageMessage(msg_map(Message::Search(s)))
})
.on_paste(move |s| {
app::Message::PageMessage(msg_map(Message::Search(s)))
})
.width(Length::Fixed(312.0))
.into(),
list_column.into(),
])
.padding([0, 64, 32, 64])
.align_items(Alignment::Center)
.spacing(8.0),
)
.width(Length::Fill)
.height(Length::Fill),
)
.style(theme::Container::Background)
.width(Length::Fill)
.height(Length::Fill)
.into(),
])
.into()
}
#[allow(clippy::too_many_lines)]
pub fn update(&mut self, message: Message, window_id: window::Id) -> Command<app::Message> {
match message {
Message::PanelConfig(c) => {
self.current_config = Some(c);
}
Message::ReorderStart(start_list) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some((list, _)) = config.plugins_wings.as_mut() else {
config.plugins_wings = Some((
start_list
.into_iter()
.map(|a: Applet| a.id.into())
.collect(),
Vec::new(),
));
return Command::none();
};
*list = start_list.into_iter().map(|a| a.id.into()).collect();
}
Message::ReorderCenter(center_list) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some(list) = config.plugins_center.as_mut() else {
config.plugins_center = Some(
center_list
.into_iter()
.map(|a: Applet| a.id.into())
.collect(),
);
return Command::none();
};
*list = center_list.into_iter().map(|a| a.id.into()).collect();
}
Message::ReorderEnd(end_list) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some((_, list)) = config.plugins_wings.as_mut() else {
config.plugins_wings = Some((
Vec::new(),
end_list.into_iter().map(|a: Applet| a.id.into()).collect(),
));
return Command::none();
};
*list = end_list.into_iter().map(|a| a.id.into()).collect();
}
Message::Applets(applets) => {
self.available_entries = applets;
}
Message::StartDnd(state) => {
self.reorder_widget_state = state;
return Command::none();
}
Message::DnDCommand(action) => {
return data_device_action(action());
}
Message::Save => {
self.reorder_widget_state = ReorderWidgetState::default();
self.save();
}
Message::RemoveStart(to_remove) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some((list, _)) = config.plugins_wings.as_mut() else {
return Command::none();
};
list.retain(|id| id != &to_remove);
self.save();
}
Message::RemoveCenter(to_remove) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some(list) = config.plugins_center.as_mut() else {
return Command::none();
};
list.retain(|id| id != &to_remove);
self.save();
}
Message::RemoveEnd(to_remove) => {
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let Some((_, list)) = config.plugins_wings.as_mut() else {
return Command::none();
};
list.retain(|id| id != &to_remove);
self.save();
}
Message::DetailStart(_) | Message::DetailCenter(_) | Message::DetailEnd(_) => {
// TODO ask design team
}
Message::Cancel => {
self.reorder_widget_state = ReorderWidgetState::default();
let current_config = self.config_helper.as_ref().and_then(|config_helper| {
// TODO error handling...
let panel_config = CosmicPanelConfig::get_entry(config_helper).ok()?;
// If the config is not present, it will be created with the default values and the name will not match
(panel_config.name == "Panel").then_some(panel_config)
});
self.current_config = current_config;
}
Message::Search(text) => {
self.search = text;
}
Message::AddApplet(applet) => {
// TODO ask design team
let Some(config) = self.current_config.as_mut() else {
return Command::none();
};
let list = if let Some((list, _)) = config.plugins_wings.as_mut() {
list
} else {
config.plugins_wings = Some((Vec::new(), Vec::new()));
&mut config.plugins_wings.as_mut().unwrap().0
};
list.push(applet.id.to_string());
self.save();
return commands::window::close_window(window_id);
}
Message::AddAppletDialog => {
self.has_dialog = true;
let window_settings = SctkWindowSettings {
window_id,
app_id: Some("com.system76.CosmicSettings".to_string()),
title: Some(fl!("add-applet")),
parent: Some(window::Id::MAIN),
autosize: false,
size_limits: layout::Limits::NONE
.min_width(300.0)
.max_width(800.0)
.min_height(200.0)
.max_height(1080.0),
size: (512, 420),
resizable: None,
client_decorations: true,
transparent: true,
..Default::default()
};
return commands::window::get_window(window_settings);
}
Message::ClosedAppletDialog => {
self.has_dialog = false;
}
Message::CloseAppletDialog => {
self.has_dialog = false;
return commands::window::close_window(window_id);
}
Message::DragAppletDialog => {
return commands::window::start_drag_window(window_id);
}
};
Command::none()
}
}
#[allow(clippy::too_many_lines)]
pub fn lists<
P: page::Page<crate::pages::Message> + AppletsPage,
T: Fn(Message) -> crate::pages::Message + Copy + 'static,
>(
msg_map: T,
) -> Section<crate::pages::Message> {
Section::default().view::<P>(move |_binder, page, _section| {
let page = page.inner();
let Some(config) = page.current_config.as_ref() else {
return Element::from(text(fl!("unknown")));
};
let button = button::standard(fl!("add-applet"));
column::with_children(vec![
column::with_children(vec![
row::with_children(vec![
text(fl!("applets")).width(Length::Fill).size(24).into(),
(button.on_press_maybe((!page.has_dialog).then_some(Message::AddAppletDialog)))
.into(),
])
.into(),
text(fl!("start-segment")).into(),
AppletReorderList::new(
config
.plugins_wings
.as_ref()
.map(|list| {
list.0
.iter()
.filter_map(|id| {
page.available_entries
.iter()
.find(|e| e.id.as_ref() == id.as_str())
.map(Applet::borrowed)
})
.collect()
})
.unwrap_or_default(),
Some((window::Id::MAIN, *APPLET_DND_ICON_ID)),
Message::StartDnd,
|a| Message::DnDCommand(Arc::new(a)),
Message::RemoveStart,
Message::DetailStart,
Message::ReorderStart,
Message::Save,
Message::Cancel,
page.reorder_widget_state.dragged_applet().as_ref(),
)
.into(),
])
.spacing(8.0)
.into(),
column::with_children(vec![
text(fl!("center-segment")).into(),
AppletReorderList::new(
config
.plugins_center
.as_ref()
.map(|list| {
list.iter()
.filter_map(|id| {
page.available_entries
.iter()
.find(|e| e.id.as_ref() == id.as_str())
.map(Applet::borrowed)
})
.collect()
})
.unwrap_or_default(),
Some((window::Id::MAIN, *APPLET_DND_ICON_ID)),
Message::StartDnd,
|a| Message::DnDCommand(Arc::new(a)),
Message::RemoveCenter,
Message::DetailCenter,
Message::ReorderCenter,
Message::Save,
Message::Cancel,
page.reorder_widget_state.dragged_applet().as_ref(),
)
.into(),
])
.spacing(8.0)
.into(),
column::with_children(vec![
text(fl!("end-segment")).into(),
AppletReorderList::new(
config
.plugins_wings
.as_ref()
.map(|list| {
list.1
.iter()
.filter_map(|id| {
page.available_entries
.iter()
.find(|e| e.id.as_ref() == id.as_str())
.map(Applet::borrowed)
})
.collect()
})
.unwrap_or_default(),
Some((window::Id::MAIN, *APPLET_DND_ICON_ID)),
Message::StartDnd,
|a| Message::DnDCommand(Arc::new(a)),
Message::RemoveEnd,
Message::DetailEnd,
Message::ReorderEnd,
Message::Save,
Message::Cancel,
page.reorder_widget_state.dragged_applet().as_ref(),
)
.into(),
])
.spacing(8.0)
.into(),
])
.padding([0, 16, 0, 16])
.spacing(12.0)
.apply(Element::from)
.map(msg_map)
})
}
#[derive(Debug, Default, Clone, PartialEq, Eq)]
pub struct Applet<'a> {
pub id: Cow<'a, str>,
pub name: Cow<'a, str>,
pub description: Cow<'a, str>,
pub icon: Cow<'a, str>,
pub path: Cow<'a, Path>,
}
impl Applet<'_> {
#[must_use]
pub fn matches(&self, query: &str) -> bool {
self.name.contains(query) || self.description.contains(query) || self.id.contains(query)
}
}
impl<'a> TryFrom<Cow<'a, Path>> for Applet<'static> {
type Error = anyhow::Error;
fn try_from(path: Cow<'a, Path>) -> Result<Self, Self::Error> {
let content = std::fs::read_to_string(path.as_ref())?;
let entry = DesktopEntry::decode(path.as_ref(), &content)?;
if entry.desktop_entry("X-CosmicApplet").is_none() {
anyhow::bail!("Not an applet");
}
Ok(Self {
id: Cow::from(entry.id().to_string()),
name: Cow::from(entry.name(None).unwrap_or_default().to_string()),
description: Cow::from(entry.comment(None).unwrap_or_default().to_string()),
icon: Cow::from(entry.icon().unwrap_or_default().to_string()),
path: Cow::from(path.into_owned()),
})
}
}
impl Applet<'static> {
fn borrowed(&self) -> Applet<'_> {
Applet {
id: Cow::from(self.id.as_ref()),
name: Cow::from(self.name.as_ref()),
description: Cow::from(self.description.as_ref()),
icon: Cow::from(self.icon.as_ref()),
path: Cow::from(self.path.as_ref()),
}
}
}
impl<'a> Applet<'a> {
fn into_owned(self) -> Applet<'static> {
Applet {
id: Cow::from(self.id.into_owned()),
name: Cow::from(self.name.into_owned()),
description: Cow::from(self.description.into_owned()),
icon: Cow::from(self.icon.into_owned()),
path: Cow::from(self.path.into_owned()),
}
}
}
// TODO A11y / keyboard support
#[allow(dead_code)]
pub struct AppletReorderList<'a, Message> {
id: Id,
info: Vec<Applet<'a>>,
on_create_dnd_source: Box<dyn Fn(ReorderWidgetState) -> Message + 'a>,
on_dnd_command_produced: OnDndCommand<'a, Message>,
on_reorder: Box<dyn Fn(Vec<Applet<'static>>) -> Message + 'a>,
on_finish: Option<Message>,
on_cancel: Option<Message>,
surface_ids: Option<(window::Id, window::Id)>,
inner: Element<'a, Message>,
}
impl<'a, Message: 'static + Clone> AppletReorderList<'a, Message> {
#[allow(clippy::too_many_arguments)]
#[must_use]
/// new applet list which can be reordered and dragged
pub fn new(
info: Vec<Applet<'a>>,
surface_ids: Option<(window::Id, window::Id)>,
on_create_dnd_source: impl Fn(ReorderWidgetState) -> Message + 'a,
on_dnd_command_produced: impl Fn(
Box<dyn Send + Sync + Fn() -> platform_specific::wayland::data_device::ActionInner>,
) -> Message
+ 'a,
on_remove: impl Fn(String) -> Message + 'a,
on_details: impl Fn(String) -> Message + 'a,
on_reorder: impl Fn(Vec<Applet<'static>>) -> Message + 'a,
on_apply_reorder: Message,
on_cancel: Message,
active_dnd: Option<&Applet<'a>>,
) -> Self {
let applet_buttons = info
.clone()
.into_iter()
.map(|info| {
let id_clone = info.id.to_string();
let is_dragged = active_dnd.as_ref().map_or(false, |dnd| dnd.id == info.id);
container(
row::with_children(vec![
icon::from_name("open-menu-symbolic")
.symbolic(true)
.size(16)
.into(),
icon::from_name(info.icon).size(32).symbolic(true).into(),
column::with_capacity(2)
.spacing(4.0)
.width(Length::Fill)
.push(text(info.name))
.push(text::caption(info.description))
.into(),
button::icon(icon::from_name("edit-delete-symbolic"))
.extra_small()
.on_press(on_remove(id_clone.clone()))
.into(),
button::icon(icon::from_name("open-menu-symbolic"))
.extra_small()
.on_press(on_details(id_clone))
.into(),
])
.spacing(12)
.align_items(Alignment::Center),
)
.width(Length::Fill)
.padding(8)
.style(theme::Container::Custom(Box::new(move |theme| {
let mut style = theme.appearance(&theme::Container::Primary);
style.border.radius = 8.0.into();
if is_dragged {
style.border.color = theme.cosmic().accent_color().into();
style.border.width = 2.0;
}
style
})))
.into()
})
.collect::<Vec<_>>();
Self {
id: Id::unique(),
info,
on_create_dnd_source: Box::new(on_create_dnd_source),
on_dnd_command_produced: Box::new(on_dnd_command_produced),
on_reorder: Box::new(on_reorder),
on_finish: Some(on_apply_reorder),
on_cancel: Some(on_cancel),
surface_ids,
inner: if active_dnd.is_some() && applet_buttons.is_empty() {
container(
text(fl!("drop-here"))
.width(Length::Fill)
.height(Length::Fill)
.vertical_alignment(Vertical::Center)
.horizontal_alignment(Horizontal::Center),
)
.width(Length::Fill)
.height(Length::Fixed(48.0))
.padding(8)
.style(theme::Container::Custom(Box::new(move |theme| {
let mut style = theme.appearance(&theme::Container::Primary);
style.border.radius = 8.0.into();
style.border.color = theme.cosmic().bg_divider().into();
style.border.width = 2.0;
style.background = Some(Color::TRANSPARENT.into());
style
})))
.into()
} else {
Column::with_children(applet_buttons)
.spacing(SPACING)
.into()
},
}
}
#[must_use]
/// mark this as a dnd icon
pub fn dnd_icon(state: &'a ReorderWidgetState) -> Self {
Self {
id: Id::unique(),
info: Vec::new(),
on_create_dnd_source: Box::new(|_| unimplemented!()),
on_dnd_command_produced: Box::new(|_| unimplemented!()),
on_reorder: Box::new(|_| unimplemented!()),
on_finish: None,
surface_ids: None,
inner: if let Some(info) = state.dragged_applet() {
container(
row::with_children(vec![
icon::from_name("open-menu-symbolic")
.size(16)
.symbolic(true)
.into(),
icon::from_name(info.icon.into_owned())
.size(32)
.symbolic(true)
.into(),
column::with_capacity(2)
.spacing(4.0)
.width(Length::Fill)
.push(text(info.name))
.push(text::caption(info.description))
.into(),
button::icon(icon::from_name("edit-delete-symbolic"))
.extra_small()
.into(),
button::icon(icon::from_name("open-menu-symbolic"))
.extra_small()
.into(),
])
.spacing(12)
.align_items(Alignment::Center),
)
.width(Length::Fixed(state.layout.map_or(400.0, |l| l.width)))
.padding(8)
.style(theme::Container::Custom(Box::new(move |theme| {
let mut style = theme.appearance(&theme::Container::Primary);
style.border.radius = 8.0.into();
style
})))
.into()
} else {
horizontal_space(1).into()
},
on_cancel: None,
}
}
#[must_use]
/// reorders the list of applets given:
/// - the bounds of the list
/// - the current mouse position during a drag
/// - the applet being offered to this list
fn get_reordered(
&self,
layout: &layout::Layout,
pos: Point,
offered_applet: Applet<'a>,
) -> Vec<Applet<'a>> {
let mut reordered: Vec<_> = self.info.clone();
if !layout.bounds().contains(pos) {
// applets shouldn't be in two lists at once
reordered.retain(|a| a != &offered_applet);
return reordered;
}
// special case
if reordered.is_empty() {
reordered.push(offered_applet);
return reordered;
}
// special case
if reordered.len() == 1 && reordered[0] == offered_applet {
return reordered;
}
let height = (layout.bounds().height - SPACING * (self.info.len() - 1) as f32)
/ self.info.len() as f32;
let mut found = false;
let mut y = layout.bounds().y;
for i in 0..=reordered.len() {
if i == 0 || i == reordered.len() {
y += height / 2.0;
} else {
y += height + SPACING;
}
if pos.y <= y {
reordered.insert(i, offered_applet.clone());
let mut index = 0;
reordered.retain(|a| {
let ret = a != &offered_applet || index == i;
index += 1;
ret
});
found = true;
break;
}
}
if !found {
reordered.retain(|a| a != &offered_applet);
reordered.push(offered_applet);
}
reordered
}
}
impl<'a, Message: 'static> Widget<Message, cosmic::Theme, cosmic::Renderer>
for AppletReorderList<'a, Message>
where
Message: Clone,
{
fn tag(&self) -> tree::Tag {
tree::Tag::of::<ReorderWidgetState>()
}
fn state(&self) -> tree::State {
tree::State::new(ReorderWidgetState::new())
}
fn children(&self) -> Vec<Tree> {
vec![Tree::new(&self.inner)]
}
fn diff(&mut self, tree: &mut Tree) {
tree.diff_children(&mut [&mut self.inner]);
}
fn size(&self) -> Size<Length> {
Size::new(Length::Fill, Length::Shrink)
}
fn layout(
&self,
tree: &mut Tree,
renderer: &cosmic::Renderer,
limits: &layout::Limits,
) -> layout::Node {
let inner_layout = self
.inner
.as_widget()
.layout(&mut tree.children[0], renderer, limits);
layout::Node::with_children(inner_layout.size(), vec![inner_layout])
}
fn operate(
&self,
tree: &mut Tree,
layout: layout::Layout<'_>,
renderer: &cosmic::Renderer,
operation: &mut dyn Operation<OperationOutputWrapper<Message>>,
) {
self.inner.as_widget().operate(
&mut tree.children[0],
layout.children().next().unwrap(),
renderer,
operation,
);
}
#[allow(clippy::too_many_lines, clippy::needless_match)]
fn on_event(
&mut self,
tree: &mut Tree,
event: event::Event,
layout: layout::Layout<'_>,
cursor_position: mouse::Cursor,
renderer: &cosmic::Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Message>,
viewport: &Rectangle,
) -> event::Status {
let mut ret = match self.inner.as_widget_mut().on_event(
&mut tree.children[0],
event.clone(),
layout.children().next().unwrap(),
cursor_position,
renderer,
clipboard,
shell,
viewport,
) {
event::Status::Captured => return event::Status::Captured,
event::Status::Ignored => event::Status::Ignored,