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/*
* 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/>.
*/
class Frontend extends TextScanner {
constructor(popup, ignoreNodes) {
super(
window,
ignoreNodes,
popup.isProxy() ? [] : [popup.getContainer()],
[(x, y) => this.popup.containsPoint(x, y)]
);
this.popup = popup;
this.options = null;
this.optionsContext = {
depth: popup.depth,
url: popup.url
};
this._pageZoomFactor = 1.0;
this._contentScale = 1.0;
this._orphaned = true;
this._lastShowPromise = Promise.resolve();
}
async prepare() {
try {
await this.updateOptions();
const {zoomFactor} = await apiGetZoom();
this.onZoomChanged({newZoomFactor: zoomFactor});
window.addEventListener('resize', this.onResize.bind(this), false);
yomichan.on('orphaned', () => this.onOrphaned());
yomichan.on('optionsUpdate', () => this.updateOptions());
yomichan.on('zoomChanged', (e) => this.onZoomChanged(e));
chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
} catch (e) {
this.onError(e);
}
}
async onResize() {
const textSource = this.getCurrentTextSource();
if (textSource !== null && await this.popup.isVisible()) {
this._showPopupContent(textSource);
}
}
onWindowMessage(e) {
const action = e.data;
const handler = Frontend._windowMessageHandlers.get(action);
if (typeof handler !== 'function') { return false; }
handler(this);
}
onRuntimeMessage({action, params}, sender, callback) {
const handler = Frontend._runtimeMessageHandlers.get(action);
if (typeof handler !== 'function') { return false; }
const result = handler(this, params, sender);
callback(result);
return false;
}
onOrphaned() {
this._orphaned = true;
}
onZoomChanged({newZoomFactor}) {
this._pageZoomFactor = newZoomFactor;
this._updateContentScale();
}
getMouseEventListeners() {
return [
...super.getMouseEventListeners(),
[window, 'message', this.onWindowMessage.bind(this)]
];
}
async updateOptions() {
this.setOptions(await apiOptionsGet(this.getOptionsContext()));
await this.popup.setOptions(this.options);
this._updateContentScale();
}
async onSearchSource(textSource, cause) {
let results = null;
try {
if (textSource !== null) {
results = (
await this.findTerms(textSource) ||
await this.findKanji(textSource)
);
if (results !== null) {
const focus = (cause === 'mouse');
this.showContent(textSource, focus, results.definitions, results.type);
}
}
} catch (e) {
if (this._orphaned) {
if (textSource !== null && this.options.scanning.modifier !== 'none') {
this._showPopupContent(textSource, 'orphaned');
}
} else {
this.onError(e);
}
} finally {
if (results === null && this.options.scanning.autoHideResults) {
this.onSearchClear(true);
}
}
return results;
}
showContent(textSource, focus, definitions, type) {
const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
this._showPopupContent(
textSource,
type,
{definitions, context: {sentence, url, focus, disableHistory: true}}
);
}
showContentCompleted() {
return this._lastShowPromise;
}
async findTerms(textSource) {
this.setTextSourceScanLength(textSource, this.options.scanning.length);
const searchText = textSource.text();
if (searchText.length === 0) { return null; }
const {definitions, length} = await apiTermsFind(searchText, {}, this.getOptionsContext());
if (definitions.length === 0) { return null; }
textSource.setEndOffset(length);
return {definitions, type: 'terms'};
}
async findKanji(textSource) {
this.setTextSourceScanLength(textSource, 1);
const searchText = textSource.text();
if (searchText.length === 0) { return null; }
const definitions = await apiKanjiFind(searchText, this.getOptionsContext());
if (definitions.length === 0) { return null; }
return {definitions, type: 'kanji'};
}
onSearchClear(changeFocus) {
this.popup.hide(changeFocus);
this.popup.clearAutoPlayTimer();
super.onSearchClear(changeFocus);
}
getOptionsContext() {
this.optionsContext.url = this.popup.url;
return this.optionsContext;
}
_showPopupContent(textSource, type=null, details=null) {
this._lastShowPromise = this.popup.showContent(
textSource.getRect(),
textSource.getWritingMode(),
type,
details
);
return this._lastShowPromise;
}
_updateContentScale() {
const {popupScalingFactor, popupScaleRelativeToPageZoom} = this.options.general;
let contentScale = popupScalingFactor;
if (popupScaleRelativeToPageZoom) { contentScale /= this._pageZoomFactor; }
if (contentScale === this._contentScale) { return; }
this._contentScale = contentScale;
this.popup.setContentScale(this._contentScale);
this.onResize();
}
}
Frontend._windowMessageHandlers = new Map([
['popupClose', (self) => self.onSearchClear(true)],
['selectionCopy', () => document.execCommand('copy')]
]);
Frontend._runtimeMessageHandlers = new Map([
['popupSetVisibleOverride', (self, {visible}) => { self.popup.setVisibleOverride(visible); }]
]);
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