102 lines
3.0 KiB
TypeScript
102 lines
3.0 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import MobileLayoutStore from '@app/stores/MobileLayoutStore';
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import ModalStore from '@app/stores/ModalStore';
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import PopoutStore from '@app/stores/PopoutStore';
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export type FocusableElementType = HTMLInputElement | HTMLTextAreaElement | HTMLDivElement;
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class InputFocusManager {
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private static instance: InputFocusManager | null = null;
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static getInstance(): InputFocusManager {
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if (!InputFocusManager.instance) {
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InputFocusManager.instance = new InputFocusManager();
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}
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return InputFocusManager.instance;
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}
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private constructor() {}
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private isFocusableElement(element: Element | null): element is FocusableElementType {
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if (!element) return false;
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if (element instanceof HTMLInputElement || element instanceof HTMLTextAreaElement) {
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return true;
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}
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if (element instanceof HTMLDivElement && (element as HTMLDivElement).contentEditable === 'true') {
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return true;
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}
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return false;
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}
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isInputFocused(excludingElement?: FocusableElementType): boolean {
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const activeElement = document.activeElement;
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if (!this.isFocusableElement(activeElement)) {
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return false;
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}
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if (excludingElement && activeElement === excludingElement) {
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return false;
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}
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return true;
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}
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canFocusTextarea(textareaElement?: FocusableElementType): boolean {
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const hasModalOpen = ModalStore?.hasModalOpen?.() ?? false;
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const hasPopoutsOpen = (PopoutStore?.getPopouts?.() ?? []).length > 0;
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const isMobileLayout = !!MobileLayoutStore?.enabled;
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const inputFocused = this.isInputFocused(textareaElement);
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return !(isMobileLayout || hasModalOpen || hasPopoutsOpen || inputFocused);
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}
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safeFocus(element: FocusableElementType, force: boolean = false): boolean {
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if (!force && !this.canFocusTextarea(element)) {
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return false;
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}
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if (element instanceof HTMLElement) {
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element.focus();
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return true;
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}
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return false;
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}
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}
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export const inputFocusManager = InputFocusManager.getInstance();
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export function isInputFocused(excludingElement?: FocusableElementType) {
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return inputFocusManager.isInputFocused(excludingElement);
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}
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export function canFocusTextarea(textareaElement?: FocusableElementType) {
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return inputFocusManager.canFocusTextarea(textareaElement);
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}
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export function safeFocus(element: FocusableElementType, force?: boolean) {
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return inputFocusManager.safeFocus(element, force);
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}
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