BREP_app 0.4.0

The BREP CAD application: an eframe (egui + wgpu) host that draws the brep-render 3D engine into an egui frame — native + wasm from one codebase.
Documentation 
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//! Input-phase commands: the virtual pointer and keyboard (§6). Each becomes
//! `egui::Event`s in the frame's `RawInput`; `click` / `drag` / `hotkey` are
//! host-side compositions of these.
use crate::automation::command::{parse_args, schema_of, Annotations, CommandSpec, Empty, Handler, NoArgs, Phase};
use crate::automation::pointer::{Button, Modifiers, Pointer, PointerState, WheelUnit};
use serde::Deserialize;
use serde_json::{json, Value};

#[derive(Deserialize, schemars::JsonSchema)]
#[serde(deny_unknown_fields)]
pub struct MoveArgs {
    /// egui points from the top-left of the app surface
    pub x: f32,
    pub y: f32,
}

#[derive(Deserialize, schemars::JsonSchema)]
#[serde(deny_unknown_fields)]
pub struct ButtonArgs {
    #[serde(default = "primary")]
    pub button: Button,
}
fn primary() -> Button {
    Button::Primary
}

#[derive(Deserialize, schemars::JsonSchema)]
#[serde(deny_unknown_fields)]
pub struct WheelArgs {
    #[serde(default)]
    pub dx: f32,
    pub dy: f32,
    #[serde(default = "point")]
    pub unit: WheelUnit,
}
fn point() -> WheelUnit {
    WheelUnit::Point
}

#[derive(Deserialize, schemars::JsonSchema)]
#[serde(deny_unknown_fields)]
pub struct KeyArgs {
    /// An egui key name: `Enter`, `Escape`, `Tab`, `Backspace`, `Delete`, `A`..`Z`, `0`..`9`, `ArrowUp`, `F1`, …
    pub key: String,
    pub pressed: bool,
    #[serde(default)]
    pub repeat: bool,
}

#[derive(Deserialize, schemars::JsonSchema)]
#[serde(deny_unknown_fields)]
pub struct TextArgs {
    pub text: String,
}

fn empty() -> Value {
    json!({})
}

fn pointer_move(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: MoveArgs = parse_args(args)?;
    p.moved(a.x, a.y, out);
    Ok(empty())
}
fn pointer_down(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: ButtonArgs = parse_args(args)?;
    p.button(a.button, true, out)?;
    Ok(empty())
}
fn pointer_up(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: ButtonArgs = parse_args(args)?;
    p.button(a.button, false, out)?;
    Ok(empty())
}
fn pointer_gone(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let _: NoArgs = parse_args(args)?;
    p.gone(out);
    Ok(empty())
}
fn wheel(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: WheelArgs = parse_args(args)?;
    p.wheel(a.dx, a.dy, a.unit, out);
    Ok(empty())
}
fn modifiers_set(p: &mut Pointer, args: Value, _out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let m: Modifiers = parse_args(args)?;
    p.set_modifiers(m);
    Ok(empty())
}
fn key(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: KeyArgs = parse_args(args)?;
    p.key(&a.key, a.pressed, a.repeat, out)?;
    Ok(empty())
}
fn text(p: &mut Pointer, args: Value, out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let a: TextArgs = parse_args(args)?;
    p.text(&a.text, out);
    Ok(empty())
}
fn pointer_state(p: &mut Pointer, args: Value, _out: &mut Vec<egui::Event>) -> Result<Value, String> {
    let _: NoArgs = parse_args(args)?;
    serde_json::to_value(p.state()).map_err(|e| e.to_string())
}

pub static COMMANDS: &[CommandSpec] = &[
    CommandSpec { name: "pointer_move", group: "pointer", doc: "Move the virtual pointer to (x, y) in egui points. Emits PointerMoved; hover, drags and picks follow from it.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<MoveArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(pointer_move) },
    CommandSpec { name: "pointer_down", group: "pointer", doc: "Press a pointer button at the current position (default primary). Errors if the pointer has never been moved.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<ButtonArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(pointer_down) },
    CommandSpec { name: "pointer_up", group: "pointer", doc: "Release a pointer button at the current position.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<ButtonArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(pointer_up) },
    CommandSpec { name: "pointer_gone", group: "pointer", doc: "Take the pointer off the surface (PointerGone): clears hover state and released buttons.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<NoArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(pointer_gone) },
    CommandSpec { name: "wheel", group: "pointer", doc: "Scroll at the current pointer position. dy < 0 zooms the viewport in; over a panel it scrolls. Raw MouseWheel, unit point/line/page.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<WheelArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(wheel) },
    CommandSpec { name: "modifiers_set", group: "pointer", doc: "Set the held modifier keys for every following pointer and key event until changed.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<Modifiers>, result_schema: schema_of::<Empty>, handler: Handler::Input(modifiers_set) },
    CommandSpec { name: "key", group: "keyboard", doc: "Press (pressed=true) or release a key by egui name, with the held modifiers.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<KeyArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(key) },
    CommandSpec { name: "text", group: "keyboard", doc: "Type text into the focused widget (an egui Text event). Click a field first.", phase: Phase::Input, annotations: Annotations::INPUT, args_schema: schema_of::<TextArgs>, result_schema: schema_of::<Empty>, handler: Handler::Input(text) },
    CommandSpec { name: "pointer_state", group: "pointer", doc: "The virtual pointer: position, held buttons, modifiers.", phase: Phase::Input, annotations: Annotations::READ, args_schema: schema_of::<NoArgs>, result_schema: schema_of::<PointerState>, handler: Handler::Input(pointer_state) },
];