Auto Draw for Pen.md

/* Automatically switches between the select and draw tools, based on whether a pen is being used.

1. Choose the select tool
2. Hover/use the pen to draw, move it away to return to select mode This is based on pen hover status, so will only work if your pen supports hover! If you click draw with the mouse or press select with the pen, switching will be disabled until the opposite input method is used.

Note: This script will stay active until the Obsidian window is closed.

Compatible with my Hardware Eraser Support script

*/
(function() {
    'use strict';
    
    let promise
    let timeout
    let disable

    function handlePointer(e) {
        ea.setView("active");
        var activeTool = ea.getExcalidrawAPI().getAppState().activeTool;
        function setActiveTool(t) {
            ea.getExcalidrawAPI().setActiveTool(t)
        }

        if (e.pointerType === 'pen') {
            if (disable) return
            if (!promise && activeTool.type==='selection') {
                setActiveTool({type:"freedraw"})
            }

            if (timeout) clearTimeout(timeout)

            function setTimeoutX(a,b) {
                timeout = setTimeout(a,b)
                return timeout
            }
    
            function revert() {
                activeTool = ea.getExcalidrawAPI().getAppState().activeTool;
                disable = false
                if (activeTool.type==='freedraw') {
                    setActiveTool({type:"selection"})
                } else if (activeTool.type==='selection') {
                    disable = true
                }
                promise = false
            }

            promise = new Promise(resolve => setTimeoutX(resolve, 500))
            promise.then(() => revert())
        }
    }
    function handleClick(e) {
        ea.setView("active");
        if (e.pointerType !== 'pen') {
            disable = false
        }
    }

    window.addEventListener('pointermove', handlePointer, { capture: true })
    window.addEventListener('pointerdown', handleClick, { capture: true })

})();