yomichan/ext/fg/js/client.js

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/*
* Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
*/
class Client {
constructor() {
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this.lastMosePos = null;
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this.popupQuery = '';
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this.popupOffset = 10;
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this.enabled = false;
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this.options = null;
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this.popup = document.createElement('iframe');
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this.popup.classList.add('yomichan-popup');
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this.popup.addEventListener('mousedown', (e) => e.stopPropagation());
this.popup.addEventListener('scroll', (e) => e.stopPropagation());
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document.body.appendChild(this.popup);
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chrome.runtime.onMessage.addListener(this.onMessage.bind(this));
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window.addEventListener('mousedown', this.onMouseDown.bind(this));
window.addEventListener('mousemove', this.onMouseMove.bind(this));
window.addEventListener('keydown', this.onKeyDown.bind(this));
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window.addEventListener('scroll', (e) => this.hidePopup());
window.addEventListener('resize', (e) => this.hidePopup());
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getOptions((opts) => {
this.setOptions(opts);
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getState((state) => this.setEnabled(state === 'enabled'));
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});
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}
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onKeyDown(e) {
if (this.enabled && this.lastMousePos !== null && (e.keyCode === 16 || e.charCode === 16)) {
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this.searchAtPoint(this.lastMousePos);
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}
}
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onMouseMove(e) {
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this.lastMousePos = {x: e.clientX, y: e.clientY};
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if (this.enabled && (e.shiftKey || e.which === 2)) {
this.searchAtPoint(this.lastMousePos);
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}
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}
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onMouseDown(e) {
this.lastMousePos = {x: e.clientX, y: e.clientY};
if (this.enabled && (e.shiftKey || e.which === 2)) {
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this.searchAtPoint(this.lastMousePos);
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} else {
this.hidePopup();
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}
}
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onMessage({name, value}, sender, callback) {
switch (name) {
case 'state':
this.setEnabled(value === 'enabled');
break;
case 'options':
this.setOptions(value);
break;
}
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callback();
}
searchAtPoint(point) {
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const range = getRangeAtPoint(point, this.options.scanLength);
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if (range === null) {
this.hidePopup();
return;
}
if (this.popup.contains(range.startContainer)) {
this.hidePopup();
return;
}
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const rect = getRangePaddedRect(range);
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if (point.x < rect.left || point.x > rect.right) {
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this.hidePopup();
return;
}
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const popupQuery = range.toString();
if (popupQuery === this.popupQuery) {
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return;
}
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findTerm(popupQuery, ({results, length}) => {
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if (length === 0) {
this.hidePopup();
} else {
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const params = {defs: results, root: chrome.extension.getURL('fg')};
renderText(params, 'defs.html', (html) => this.showPopup(range, html, popupQuery, length));
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}
});
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}
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showPopup(range, html, popupQuery, length) {
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if (this.options.highlightText) {
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range.setEnd(range.endContainer, range.startOffset + length);
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const selection = window.getSelection();
selection.removeAllRanges();
selection.addRange(range);
}
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const pos = getPopupPositionForRange(this.popup, range, this.popupOffset);
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if (this.popup.getAttribute('srcdoc') !== html) {
this.popup.setAttribute('srcdoc', html);
}
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this.popup.style.left = pos.x + 'px';
this.popup.style.top = pos.y + 'px';
this.popup.style.visibility = 'visible';
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this.popupQuery = popupQuery;
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}
hidePopup() {
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if (this.popup.style.visibility === 'hidden') {
return;
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}
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if (this.options.highlightText) {
const selection = window.getSelection();
selection.removeAllRanges();
}
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this.popup.style.visibility = 'hidden';
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this.popupQuery = '';
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}
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setEnabled(enabled) {
if (!(this.enabled = enabled)) {
this.hidePopup();
}
}
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setOptions(opts) {
this.options = opts;
}
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}
window.yomiClient = new Client();