409 lines
13 KiB
Rust
409 lines
13 KiB
Rust
use crate::{Selectable, StyledExt as _};
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use gpui::{
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actions, anchored, deferred, div, prelude::FluentBuilder as _, px, AnyElement, AppContext,
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Bounds, Corner, DismissEvent, DispatchPhase, Element, ElementId, EventEmitter, FocusHandle,
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FocusableView, GlobalElementId, Hitbox, InteractiveElement as _, IntoElement, KeyBinding,
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LayoutId, ManagedView, MouseButton, MouseDownEvent, ParentElement, Pixels, Point, Render,
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Style, StyleRefinement, Styled, View, ViewContext, VisualContext, WindowContext,
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};
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use std::{cell::RefCell, rc::Rc};
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const CONTEXT: &str = "Popover";
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actions!(popover, [Escape]);
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pub fn init(cx: &mut AppContext) {
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cx.bind_keys([KeyBinding::new("escape", Escape, Some(CONTEXT))])
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}
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type Content<T> = Rc<dyn Fn(&mut ViewContext<T>) -> AnyElement>;
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pub struct PopoverContent {
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focus_handle: FocusHandle,
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content: Content<Self>,
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max_width: Option<Pixels>,
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}
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impl PopoverContent {
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pub fn new<B>(cx: &mut WindowContext, content: B) -> Self
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where
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B: Fn(&mut ViewContext<Self>) -> AnyElement + 'static,
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{
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let focus_handle = cx.focus_handle();
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Self {
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focus_handle,
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content: Rc::new(content),
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max_width: None,
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}
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}
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pub fn max_w(mut self, max_width: Pixels) -> Self {
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self.max_width = Some(max_width);
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self
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}
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}
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impl EventEmitter<DismissEvent> for PopoverContent {}
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impl FocusableView for PopoverContent {
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fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
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self.focus_handle.clone()
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}
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}
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impl Render for PopoverContent {
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fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
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div()
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.track_focus(&self.focus_handle)
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.key_context(CONTEXT)
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.on_action(cx.listener(|_, _: &Escape, cx| cx.emit(DismissEvent)))
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.p_2()
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.when_some(self.max_width, |this, v| this.max_w(v))
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.child(self.content.clone()(cx))
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}
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}
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type Trigger = Option<Box<dyn FnOnce(bool, &WindowContext) -> AnyElement + 'static>>;
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type ViewContent<M> = Option<Rc<dyn Fn(&mut WindowContext) -> View<M> + 'static>>;
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pub struct Popover<M: ManagedView> {
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id: ElementId,
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anchor: Corner,
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trigger: Trigger,
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content: ViewContent<M>,
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/// Style for trigger element.
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/// This is used for hotfix the trigger element style to support w_full.
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trigger_style: Option<StyleRefinement>,
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mouse_button: MouseButton,
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no_style: bool,
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}
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impl<M> Popover<M>
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where
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M: ManagedView,
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{
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/// Create a new Popover with `view` mode.
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pub fn new(id: impl Into<ElementId>) -> Self {
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Self {
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id: id.into(),
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anchor: Corner::TopLeft,
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trigger: None,
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trigger_style: None,
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content: None,
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mouse_button: MouseButton::Left,
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no_style: false,
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}
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}
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pub fn anchor(mut self, anchor: Corner) -> Self {
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self.anchor = anchor;
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self
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}
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/// Set the mouse button to trigger the popover, default is `MouseButton::Left`.
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pub fn mouse_button(mut self, mouse_button: MouseButton) -> Self {
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self.mouse_button = mouse_button;
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self
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}
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pub fn trigger<T>(mut self, trigger: T) -> Self
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where
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T: Selectable + IntoElement + 'static,
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{
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self.trigger = Some(Box::new(|is_open, _| {
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trigger.selected(is_open).into_any_element()
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}));
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self
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}
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pub fn trigger_style(mut self, style: StyleRefinement) -> Self {
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self.trigger_style = Some(style);
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self
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}
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/// Set the content of the popover.
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///
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/// The `content` is a closure that returns an `AnyElement`.
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pub fn content<C>(mut self, content: C) -> Self
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where
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C: Fn(&mut WindowContext) -> View<M> + 'static,
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{
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self.content = Some(Rc::new(content));
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self
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}
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/// Set whether the popover no style, default is `false`.
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///
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/// If no style:
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///
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/// - The popover will not have a bg, border, shadow, or padding.
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/// - The click out of the popover will not dismiss it.
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pub fn no_style(mut self) -> Self {
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self.no_style = true;
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self
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}
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fn render_trigger(&mut self, is_open: bool, cx: &mut WindowContext) -> AnyElement {
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let Some(trigger) = self.trigger.take() else {
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return div().into_any_element();
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};
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(trigger)(is_open, cx)
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}
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fn resolved_corner(&self, bounds: Bounds<Pixels>) -> Point<Pixels> {
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bounds.corner(match self.anchor {
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Corner::TopLeft => Corner::BottomLeft,
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Corner::TopRight => Corner::BottomRight,
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Corner::BottomLeft => Corner::TopLeft,
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Corner::BottomRight => Corner::TopRight,
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})
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}
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fn with_element_state<R>(
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&mut self,
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id: &GlobalElementId,
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cx: &mut WindowContext,
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f: impl FnOnce(&mut Self, &mut PopoverElementState<M>, &mut WindowContext) -> R,
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) -> R {
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cx.with_optional_element_state::<PopoverElementState<M>, _>(
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Some(id),
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|element_state, cx| {
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let mut element_state = element_state.unwrap().unwrap_or_default();
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let result = f(self, &mut element_state, cx);
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(result, Some(element_state))
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},
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)
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}
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}
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impl<M> IntoElement for Popover<M>
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where
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M: ManagedView,
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{
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type Element = Self;
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fn into_element(self) -> Self::Element {
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self
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}
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}
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pub struct PopoverElementState<M> {
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trigger_layout_id: Option<LayoutId>,
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popover_layout_id: Option<LayoutId>,
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popover_element: Option<AnyElement>,
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trigger_element: Option<AnyElement>,
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content_view: Rc<RefCell<Option<View<M>>>>,
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/// Trigger bounds for positioning the popover.
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trigger_bounds: Option<Bounds<Pixels>>,
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}
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impl<M> Default for PopoverElementState<M> {
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fn default() -> Self {
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Self {
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trigger_layout_id: None,
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popover_layout_id: None,
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popover_element: None,
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trigger_element: None,
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content_view: Rc::new(RefCell::new(None)),
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trigger_bounds: None,
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}
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}
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}
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pub struct PrepaintState {
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hitbox: Hitbox,
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/// Trigger bounds for limit a rect to handle mouse click.
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trigger_bounds: Option<Bounds<Pixels>>,
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}
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impl<M: ManagedView> Element for Popover<M> {
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type RequestLayoutState = PopoverElementState<M>;
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type PrepaintState = PrepaintState;
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fn id(&self) -> Option<ElementId> {
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Some(self.id.clone())
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}
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fn request_layout(
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&mut self,
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id: Option<&gpui::GlobalElementId>,
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cx: &mut WindowContext,
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) -> (gpui::LayoutId, Self::RequestLayoutState) {
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let mut style = Style::default();
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// FIXME: Remove this and find a better way to handle this.
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// Apply trigger style, for support w_full for trigger.
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//
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// If remove this, the trigger will not support w_full.
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if let Some(trigger_style) = self.trigger_style.clone() {
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if let Some(width) = trigger_style.size.width {
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style.size.width = width;
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}
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if let Some(display) = trigger_style.display {
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style.display = display;
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}
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}
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self.with_element_state(id.unwrap(), cx, |view, element_state, cx| {
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let mut popover_layout_id = None;
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let mut popover_element = None;
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let mut is_open = false;
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if let Some(content_view) = element_state.content_view.borrow_mut().as_mut() {
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is_open = true;
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let mut anchored = anchored()
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.snap_to_window_with_margin(px(8.))
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.anchor(view.anchor);
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if let Some(trigger_bounds) = element_state.trigger_bounds {
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anchored = anchored.position(view.resolved_corner(trigger_bounds));
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}
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let mut element = {
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let content_view_mut = element_state.content_view.clone();
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let anchor = view.anchor;
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let no_style = view.no_style;
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deferred(
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anchored.child(
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div()
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.size_full()
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.occlude()
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.when(!no_style, |this| this.popover_style(cx))
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.map(|this| match anchor {
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Corner::TopLeft | Corner::TopRight => this.top_1p5(),
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Corner::BottomLeft | Corner::BottomRight => this.bottom_1p5(),
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})
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.child(content_view.clone())
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.when(!no_style, |this| {
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this.on_mouse_down_out(move |_, cx| {
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// Update the element_state.content_view to `None`,
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// so that the `paint`` method will not paint it.
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*content_view_mut.borrow_mut() = None;
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cx.refresh();
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})
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}),
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),
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)
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.with_priority(1)
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.into_any()
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};
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popover_layout_id = Some(element.request_layout(cx));
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popover_element = Some(element);
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}
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let mut trigger_element = view.render_trigger(is_open, cx);
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let trigger_layout_id = trigger_element.request_layout(cx);
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let layout_id = cx.request_layout(
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style,
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Some(trigger_layout_id).into_iter().chain(popover_layout_id),
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);
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(
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layout_id,
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PopoverElementState {
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trigger_layout_id: Some(trigger_layout_id),
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popover_layout_id,
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popover_element,
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trigger_element: Some(trigger_element),
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..Default::default()
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},
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)
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})
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}
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fn prepaint(
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&mut self,
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_id: Option<&gpui::GlobalElementId>,
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_bounds: gpui::Bounds<gpui::Pixels>,
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request_layout: &mut Self::RequestLayoutState,
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cx: &mut WindowContext,
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) -> Self::PrepaintState {
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if let Some(element) = &mut request_layout.trigger_element {
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element.prepaint(cx);
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}
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if let Some(element) = &mut request_layout.popover_element {
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element.prepaint(cx);
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}
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let trigger_bounds = request_layout
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.trigger_layout_id
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.map(|id| cx.layout_bounds(id));
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// Prepare the popover, for get the bounds of it for open window size.
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let _ = request_layout
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.popover_layout_id
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.map(|id| cx.layout_bounds(id));
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let hitbox = cx.insert_hitbox(trigger_bounds.unwrap_or_default(), false);
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PrepaintState {
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trigger_bounds,
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hitbox,
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}
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}
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fn paint(
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&mut self,
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id: Option<&GlobalElementId>,
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_bounds: Bounds<Pixels>,
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request_layout: &mut Self::RequestLayoutState,
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prepaint: &mut Self::PrepaintState,
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cx: &mut WindowContext,
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) {
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self.with_element_state(id.unwrap(), cx, |this, element_state, cx| {
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element_state.trigger_bounds = prepaint.trigger_bounds;
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if let Some(mut element) = request_layout.trigger_element.take() {
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element.paint(cx);
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}
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if let Some(mut element) = request_layout.popover_element.take() {
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element.paint(cx);
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return;
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}
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// When mouse click down in the trigger bounds, open the popover.
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let Some(content_build) = this.content.take() else {
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return;
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};
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let old_content_view = element_state.content_view.clone();
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let hitbox_id = prepaint.hitbox.id;
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let mouse_button = this.mouse_button;
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cx.on_mouse_event(move |event: &MouseDownEvent, phase, cx| {
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if phase == DispatchPhase::Bubble
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&& event.button == mouse_button
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&& hitbox_id.is_hovered(cx)
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{
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cx.stop_propagation();
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cx.prevent_default();
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let new_content_view = (content_build)(cx);
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let old_content_view1 = old_content_view.clone();
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let previous_focus_handle = cx.focused();
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cx.subscribe(&new_content_view, move |modal, _: &DismissEvent, cx| {
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if modal.focus_handle(cx).contains_focused(cx) {
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if let Some(previous_focus_handle) = previous_focus_handle.as_ref() {
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cx.focus(previous_focus_handle);
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}
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}
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*old_content_view1.borrow_mut() = None;
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cx.refresh();
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})
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.detach();
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cx.focus_view(&new_content_view);
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*old_content_view.borrow_mut() = Some(new_content_view);
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cx.refresh();
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}
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});
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});
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}
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}
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