yomichan/ext/fg/js/client.js
2016-04-14 21:55:21 -07:00

162 lines
4.9 KiB
JavaScript

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