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46 lines
1.8 KiB
JavaScript
46 lines
1.8 KiB
JavaScript
/*
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* Copyright (C) 2025 Yomitan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/**
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* Mobile browsers report that keyboards are composing even when they are clearly sending normal input.
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* This conflicts with detection of desktop IME composing which is reported correctly.
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* If the composing input is a single alphabetic letter, it is almost certainly a mobile keyboard pretending to be composing.
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* This is not foolproof. For example a Japanese IME could try to convert `えい` to `A` which would show as "fake composing". But this is unlikely.
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* @param {InputEvent} event
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* @returns {boolean}
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*/
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export function isFakeComposing(event) {
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return !!event.data?.match(/^[A-Za-z]$/);
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}
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/**
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* @param {InputEvent} event
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* @param {string} platform
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* @param {string} browser
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* @returns {boolean}
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*/
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export function isComposing(event, platform, browser) {
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// Desktop Composing
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if (event.isComposing && platform !== 'android') { return true; }
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// Android Composing
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// eslint-disable-next-line sonarjs/prefer-single-boolean-return
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if (event.isComposing && !isFakeComposing(event) && platform === 'android' && browser !== 'firefox-mobile') { return true; }
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return false;
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}
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