Module rendering 

DOM canvas and drawable trait for mapping Cotis render commands to HTML/CSS.

The typical app path is HTMLRenderer::draw_frame → draw_html_render_commands, which creates an HTMLCanvas, draws each HTMLDrawable command, then calls HTMLCanvas::finish.

Default drawables for cotis_defaults::render_commands live in drawable_defaults.

Frame lifecycle

1. HTMLCanvas::new → JS beginFrame
2. For each command: HTMLCanvas::ensure_command_element + CSS pushes (or clip stack ops)
3. HTMLCanvas::finish → finalize DOM nodes → JS endFrame removes unused cotis-* ids

Quick start

use cotis_web::rendering::{HTMLCanvas, HTMLDrawable};

let mut canvas = HTMLCanvas::new();
canvas
    .ensure_command_element(1, "div", None)
    .current_element_css_push("position: absolute; left: 10px; top: 10px")
    .current_element_css_push("width: 100px; height: 50px")
    .current_element_css_push("background-color: red; border-radius: 5px");
canvas.finish();

Core API

• HTMLCanvas::ensure_command_element — open or reuse host for a command id (cotis-{id})
• HTMLCanvas::new_element — ad-hoc child element with generated id
• HTMLCanvas::current_element_css_push — append/overwrite CSS on current host
• HTMLCanvas::finish — commit frame and remove stale DOM nodes

Modules

drawable_defaults

Default HTMLDrawable implementations for cotis_defaults::render_commands types.

Structs

HTMLCanvas

Per-frame DOM builder: creates/updates cotis-{id} elements and manages clip stacks.

Traits

HTMLDrawable

Types that can draw themselves onto an HTMLCanvas (typically cotis-defaults commands).

Functions

draw_html_render_commands

Renders an iterator of drawables as one DOM frame.