@teaui/core/.dist/managers/ModalManager.js

A high-level terminal UI library for Node

export class ModalManager {
    #stack = [];
    reset() {
        this.#stack = [];
    }
    requestModal(modal, rect) {
        this.#stack.push({ modal, presentedRect: rect });
        return true;
    }
    renderModals(screen, viewport) {
        let lastView = screen.rootView;
        // Drain the stack: process entries one at a time.
        // screen.preRender() resets the modal manager (calls reset()), which
        // clears the stack. So we shift entries off one by one rather than
        // snapshotting, ensuring that nested modals pushed during render()
        // are appended to the stack and processed in subsequent iterations.
        while (this.#stack.length > 0) {
            const { modal, presentedRect } = this.#stack.shift();
            modal.presentedRect = presentedRect;
            modal.windowSize = viewport.contentSize;
            // preRender resets managers (including this one via reset()).
            // Any modals already in the stack are lost — but we shifted ours
            // out first, and new modals pushed during render() go onto the
            // now-empty stack.
            screen.preRender(modal);
            lastView = modal;
            modal.moveToScreen(screen);
            modal.naturalSize(viewport.contentSize);
            viewport.parentRect = presentedRect;
            modal.render(viewport);
        }
        return lastView;
    }
}
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