yomichan/ext/fg/js/float.js

/*
 * Copyright (C) 2016-2020  Alex Yatskov <alex@foosoft.net>
 * Author: Alex Yatskov <alex@foosoft.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

/*global popupNestedInitialize, Display*/

class DisplayFloat extends Display {
    constructor() {
        super(document.querySelector('#spinner'), document.querySelector('#definitions'));
        this.autoPlayAudioTimer = null;

        this.optionsContext = {
            depth: 0,
            url: window.location.href
        };

        this._orphaned = false;

        yomichan.on('orphaned', () => this.onOrphaned());
        window.addEventListener('message', (e) => this.onMessage(e), false);
    }

    async prepare(options, popupInfo, url, childrenSupported, scale) {
        await super.prepare(options);

        const {id, depth, parentFrameId} = popupInfo;
        this.optionsContext.depth = depth;
        this.optionsContext.url = url;

        if (childrenSupported) {
            popupNestedInitialize(id, depth, parentFrameId, url);
        }

        this.setContentScale(scale);

        apiForward('popupSetDisplayInitialized');
    }

    onError(error) {
        if (this._orphaned) {
            this.setContent('orphaned');
        } else {
            logError(error, true);
        }
    }

    onOrphaned() {
        this._orphaned = true;
    }

    onSearchClear() {
        window.parent.postMessage('popupClose', '*');
    }

    onSelectionCopy() {
        window.parent.postMessage('selectionCopy', '*');
    }

    onMessage(e) {
        const {action, params} = e.data;
        const handler = DisplayFloat._messageHandlers.get(action);
        if (typeof handler !== 'function') { return; }

        handler(this, params);
    }

    onKeyDown(e) {
        const key = Display.getKeyFromEvent(e);
        const handler = DisplayFloat._onKeyDownHandlers.get(key);
        if (typeof handler === 'function') {
            if (handler(this, e)) {
                e.preventDefault();
                return true;
            }
        }
        return super.onKeyDown(e);
    }

    getOptionsContext() {
        return this.optionsContext;
    }

    autoPlayAudio() {
        this.clearAutoPlayTimer();
        this.autoPlayAudioTimer = window.setTimeout(() => super.autoPlayAudio(), 400);
    }

    clearAutoPlayTimer() {
        if (this.autoPlayAudioTimer) {
            window.clearTimeout(this.autoPlayAudioTimer);
            this.autoPlayAudioTimer = null;
        }
    }

    setContentScale(scale) {
        document.body.style.fontSize = `${scale}em`;
    }
}

DisplayFloat._onKeyDownHandlers = new Map([
    ['C', (self, e) => {
        if (e.ctrlKey && !window.getSelection().toString()) {
            self.onSelectionCopy();
            return true;
        }
        return false;
    }]
]);

DisplayFloat._messageHandlers = new Map([
    ['setContent', (self, {type, details}) => self.setContent(type, details)],
    ['clearAutoPlayTimer', (self) => self.clearAutoPlayTimer()],
    ['setCustomCss', (self, {css}) => self.setCustomCss(css)],
    ['initialize', (self, {options, popupInfo, url, childrenSupported, scale}) => self.prepare(options, popupInfo, url, childrenSupported, scale)],
    ['setContentScale', (self, {scale}) => self.setContentScale(scale)]
]);

DisplayFloat.instance = new DisplayFloat();