mathtex_editor_core/
host.rs

1//! Host API for the guest and host boundary.
2
3use crate::command::ExitDir;
4use crate::doc::Document;
5
6/// A rectangle in IR/render coordinate space.
7#[derive(Debug, Clone, Copy, PartialEq)]
8pub struct Rect {
9    /// Horizontal position.
10    pub x: f64,
11    /// Vertical position.
12    pub y: f64,
13    /// Rectangle width.
14    pub width: f64,
15    /// Rectangle height.
16    pub height: f64,
17}
18
19/// Inline layout metrics for the whole fragment.
20#[derive(Debug, Clone, Copy, PartialEq)]
21pub struct Metrics {
22    /// Inline layout width.
23    pub width: f64,
24    /// Inline layout height.
25    pub height: f64,
26    /// Inline layout baseline.
27    pub baseline: f64,
28}
29
30/// The renderer neutral output the host paints.
31pub struct RenderOutput {
32    /// The mathtex IR fragment.
33    pub ir: mathtex_ir::Fragment,
34    /// The caret rectangle.
35    pub caret: Rect,
36    /// The selection rectangles.
37    pub selection: Vec<Rect>,
38    /// Empty slot placeholder rectangles.
39    pub placeholders: Vec<Rect>,
40    /// The fragment metrics.
41    pub metrics: Metrics,
42    /// The Backspace dropdown menu when one is open.
43    pub menu: Option<crate::menu::MenuView>,
44}
45
46/// Callbacks implemented by the host.
47pub trait Host {
48    /// Typeset a LaTeX fragment to the mathtex IR.
49    fn typeset(&self, latex: &str) -> mathtex_ir::Fragment;
50    /// Handle changed content.
51    fn on_change(&self, doc: &Document);
52    /// Handle the caret leaving the math region at a boundary.
53    fn on_exit(&self, dir: ExitDir);
54    /// Request that math mode ends.
55    fn request_close(&self);
56    /// Request a repaint via `Editor::render`.
57    fn on_render(&self);
58}
mathtex_editor_core/host.rs

mathtex_editor_core/
host.rs
