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tildes-reextended/source/content-scripts.ts

130 lines
3.6 KiB
TypeScript

import './scss/scripts.scss';
import {html} from 'htm/preact';
import {render} from 'preact';
import {
AutocompleteFeature,
BackToTopFeature,
JumpToNewCommentFeature,
UserLabelsFeature,
runAnonymizeUsernamesFeature,
runHideVotesFeature,
runMarkdownToolbarFeature,
} from './scripts/exports.js';
import Settings from './settings.js';
import {extractGroups, initializeGlobals, log} from './utilities/exports.js';
async function initialize() {
const start = window.performance.now();
initializeGlobals();
const settings = await Settings.fromSyncStorage();
window.TildesReExtended.debug = settings.features.debug;
// Any features that will use `settings.data.knownGroups` should be added to
// this array so that when groups are changed on Tildes, TRX can still update
// them without having to change the hardcoded values.
const usesKnownGroups = [settings.features.autocomplete];
// Only when any of the features that uses this data try to save the groups.
if (usesKnownGroups.some((value) => value)) {
const knownGroups = extractGroups();
if (knownGroups !== undefined) {
settings.data.knownGroups = knownGroups;
await settings.save();
}
}
const observerFeatures: Array<() => any> = [];
const observer = new window.MutationObserver(() => {
log('Page mutation detected, rerunning features.');
observer.disconnect();
for (const feature of observerFeatures) {
feature();
}
startObserver();
});
function startObserver() {
observer.observe(document.body, {
childList: true,
subtree: true,
});
}
if (settings.features.anonymizeUsernames) {
observerFeatures.push(() => {
runAnonymizeUsernamesFeature();
});
}
if (settings.features.hideVotes) {
observerFeatures.push(() => {
runHideVotesFeature(settings);
});
}
if (settings.features.markdownToolbar) {
observerFeatures.push(() => {
runMarkdownToolbarFeature();
});
}
// Initialize all the observer-dependent features first.
for (const feature of observerFeatures) {
feature();
}
// Object to hold the active components we are going to render.
const components: Record<string, TRXComponent | undefined> = {};
if (settings.features.autocomplete) {
components.autocomplete = html`
<${AutocompleteFeature} settings=${settings} />
`;
}
if (settings.features.backToTop) {
components.backToTop = html`<${BackToTopFeature} />`;
}
if (settings.features.jumpToNewComment) {
components.jumpToNewComment = html`<${JumpToNewCommentFeature} />`;
}
if (settings.features.userLabels) {
components.userLabels = html`
<${UserLabelsFeature} settings=${settings} />
`;
}
// Insert a placeholder at the end of the body first, then render the rest
// and use that as the replacement element. Otherwise render() would put it
// at the beginning of the body which causes a bunch of different issues.
const replacement = document.createElement('div');
document.body.append(replacement);
// The jump to new comment button must come right before
// the back to top button. The CSS depends on them being in this order.
render(
html`
<div id="trx-container">
${components.jumpToNewComment} ${components.backToTop}
${components.autocomplete} ${components.userLabels}
</div>
`,
document.body,
replacement,
);
// Start the mutation observer only when some features depend on it are enabled.
if (observerFeatures.length > 0) {
startObserver();
}
const initializedIn = window.performance.now() - start;
log(`Initialized in approximately ${initializedIn} milliseconds.`);
}
void initialize();