88 lines
2.8 KiB
JavaScript
88 lines
2.8 KiB
JavaScript
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/* global
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API
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URLS
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*/
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'use strict';
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const ABOUT_BLANK = 'about:blank';
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/* exported tabURL */
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/** @type string */
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let tabURL;
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/* exported initializing */
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const initializing = (async () => {
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let [tab] = await browser.tabs.query({currentWindow: true, active: true});
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if (!chrome.app && tab.status === 'loading' && tab.url === 'about:blank') {
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tab = await waitForTabUrlFF(tab);
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}
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const frames = sortTabFrames(await browser.webNavigation.getAllFrames({tabId: tab.id}));
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let url = tab.pendingUrl || tab.url || ''; // new Chrome uses pendingUrl while connecting
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if (url === 'chrome://newtab/' && !URLS.chromeProtectsNTP) {
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url = frames[0].url || '';
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}
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if (!URLS.supported(url)) {
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url = '';
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frames.length = 1;
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}
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tabURL = frames[0].url = url;
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const uniqFrames = frames.filter(f => f.url && !f.isDupe);
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const styles = await Promise.all(uniqFrames.map(getFrameStyles));
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return {frames, styles};
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async function getFrameStyles({url}) {
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return {
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url,
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styles: await getStyleDataMerged(url),
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};
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}
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/** @param {chrome.webNavigation.GetAllFrameResultDetails[]} frames */
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function sortTabFrames(frames) {
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const unknown = new Map(frames.map(f => [f.frameId, f]));
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const known = new Map([[0, unknown.get(0) || {frameId: 0, url: ''}]]);
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unknown.delete(0);
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let lastSize = 0;
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while (unknown.size !== lastSize) {
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for (const [frameId, f] of unknown) {
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if (known.has(f.parentFrameId)) {
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unknown.delete(frameId);
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if (!f.errorOccurred) known.set(frameId, f);
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if (f.url === ABOUT_BLANK) f.url = known.get(f.parentFrameId).url;
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}
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}
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lastSize = unknown.size; // guard against an infinite loop due to a weird frame structure
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}
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const sortedFrames = [...known.values(), ...unknown.values()];
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const urls = new Set([ABOUT_BLANK]);
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for (const f of sortedFrames) {
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if (!f.url) f.url = '';
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f.isDupe = urls.has(f.url);
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urls.add(f.url);
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}
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return sortedFrames;
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}
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function waitForTabUrlFF(tab) {
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return new Promise(resolve => {
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browser.tabs.onUpdated.addListener(...[
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function onUpdated(tabId, info, updatedTab) {
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if (info.url && tabId === tab.id) {
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browser.tabs.onUpdated.removeListener(onUpdated);
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resolve(updatedTab);
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}
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},
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...'UpdateFilter' in browser.tabs ? [{tabId: tab.id}] : [],
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// TODO: remove both spreads and tabId check when strict_min_version >= 61
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]);
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});
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}
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})();
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/* Merges the extra props from API into style data.
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* When `id` is specified returns a single object otherwise an array */
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async function getStyleDataMerged(url, id) {
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const styles = (await API.getStylesByUrl(url, id))
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.map(r => Object.assign(r.data, r));
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return id ? styles[0] : styles;
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}
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