ZacharyZhang-NY
c474a3eb33
ToolLayer lies over an InfiniteCanvas and carries its tools. Select takes the topmost shape a press reaches, Shift adds or drops one, a drag moves the selection and snaps its nearest edge or middle to another shape's within reach, a handle resizes it, Shift keeping a corner's shape, and a drag on empty space draws a SelectionBox that takes what lies wholly inside. The shape tools draw by a drag toward any corner, Shift keeping them square; the pen adds a point per press and a double press ends the path; text drops a line where pressed; the brush strokes a path its width. A drag may end in the layer or out of it; each gesture ends once and asks the owner. SelectionBox, TransformHandles and SnapIndicator draw the marks. ToolPalette picks a tool from icons named in tips; BrushSettings sets a brush's width and hue; HistoryPanel lists the steps done, the undone ones quiet, and takes the drawing to a step on Enter or a double press. The model changes: lines and arrows end at a named corner, so they run either way, and paths carry their width. Three Lucide icons: hexagon, slash and move-up-right.
86 lines
2.7 KiB
Rust
86 lines
2.7 KiB
Rust
use std::rc::Rc;
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use gpui::{App, ElementId, IntoElement, ParentElement, RenderOnce, SharedString, Window, div};
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use crate::{
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lists::{ListItem, SelectableList},
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primitives::{Icon, IconName},
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theme::{ActiveTheme, IconSize},
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};
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type OnStep = Rc<dyn Fn(usize, &mut Window, &mut App)>;
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/// What was done, oldest first, with the document at step `at`: the steps after it were undone and read quiet. Enter or a double press on a step takes the document back or forward to it.
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#[derive(IntoElement)]
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pub struct HistoryPanel {
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id: ElementId,
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steps: Vec<SharedString>,
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at: usize,
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on_step: Option<OnStep>,
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}
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impl HistoryPanel {
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/// `at` counts the steps in force; none undone is `steps.len()`.
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pub fn new(
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id: impl Into<ElementId>,
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steps: impl IntoIterator<Item = impl Into<SharedString>>,
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at: usize,
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) -> Self {
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let steps: Vec<SharedString> = steps.into_iter().map(Into::into).collect();
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assert!(
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at <= steps.len(),
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"history at {at} of {} steps",
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steps.len()
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);
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Self {
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id: id.into(),
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steps,
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at,
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on_step: None,
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}
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}
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/// Gets how many steps to keep in force.
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pub fn on_step(mut self, handler: impl Fn(usize, &mut Window, &mut App) + 'static) -> Self {
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self.on_step = Some(Rc::new(handler));
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self
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}
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}
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impl RenderOnce for HistoryPanel {
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fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
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let theme = cx.theme();
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let at = self.at;
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let rows = self.steps.into_iter().enumerate().fold(
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SelectableList::new((self.id.clone(), "steps")),
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|list, (ix, step)| {
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let done = ix < at;
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let mark = Icon::new(if done {
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IconName::Check
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} else {
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IconName::RotateCcw
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})
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.size(IconSize::Sm)
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.color(if done {
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theme.colors.fg_muted
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} else {
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theme.colors.fg_subtle
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});
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let row = ListItem::new((self.id.clone(), format!("step-{ix}")), step)
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.leading(mark)
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.quiet(!done)
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.current(ix + 1 == at);
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list.row(format!("{ix}"), row)
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},
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);
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let on_step = self.on_step;
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div().child(rows.on_activate(move |key, window, cx| {
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let ix: usize = key.parse().expect("a step's key is its place");
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log::info!("history panel: back to step {}", ix + 1);
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if let Some(on_step) = &on_step {
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on_step(ix + 1, window, cx);
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}
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}))
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}
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}
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