mirror of
https://github.com/Shik3i/KoalaSync.git
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Timo
577 lines
24 KiB
JavaScript
577 lines
24 KiB
JavaScript
export const MEDIA_FRAME_ACCESS_REQUIRED = 'media_frame_access_required';
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const MIN_PLAYER_FRAME_AREA = 320 * 180;
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const MIN_PLAYER_ASPECT_RATIO = 1.15;
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const MAX_PLAYER_ASPECT_RATIO = 2.6;
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function normalizeFrameId(value) {
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return Number.isInteger(value) && value >= 0 ? value : 0;
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}
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function safeOrigin(value) {
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try {
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const url = new URL(value);
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return (url.protocol === 'http:' || url.protocol === 'https:') ? url.origin : null;
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} catch {
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return null;
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}
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}
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function originPattern(value) {
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try {
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const url = new URL(value);
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if (url.protocol !== 'http:' && url.protocol !== 'https:') return null;
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// WebExtension match patterns intentionally omit ports. Chromium treats
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// the host pattern port-independently; Firefox rejects explicit ports.
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return `${url.protocol}//${url.hostname}/*`;
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} catch {
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return null;
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}
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}
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function isGoogleDrivePlayerUrl(value) {
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try {
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const url = new URL(value);
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if (url.hostname.toLowerCase() !== 'youtube.googleapis.com'
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|| (url.pathname !== '/embed' && !url.pathname.startsWith('/embed/'))) {
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return false;
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}
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const parentOrigin = url.searchParams.get('origin') || url.searchParams.get('post_message_origin');
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return parentOrigin === 'https://drive.google.com';
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} catch {
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return false;
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}
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}
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/**
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* Runs inside every frame through chrome.scripting.executeScript. Keep this
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* function self-contained: extension functions outside its body are not
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* available in the injected isolated world.
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*/
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export function inspectMediaFrame(expectedVisibilityToken = null) {
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const elementIsVisible = (element, rect) => {
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if (!rect || rect.width <= 0 || rect.height <= 0) return false;
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const view = element.ownerDocument?.defaultView || window;
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const style = view.getComputedStyle(element);
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if (style.display === 'none' || style.visibility === 'hidden' || Number(style.opacity) === 0) {
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return false;
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}
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if (typeof element.checkVisibility === 'function'
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&& !element.checkVisibility({ checkOpacity: true, checkVisibilityCSS: true })) {
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return false;
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}
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const layoutWidth = Math.max(view.innerWidth, element.ownerDocument?.documentElement?.scrollWidth || 0);
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const layoutHeight = Math.max(view.innerHeight, element.ownerDocument?.documentElement?.scrollHeight || 0);
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const scrollX = Number(view.scrollX) || 0;
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const scrollY = Number(view.scrollY) || 0;
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return rect.bottom + scrollY > 0
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&& rect.right + scrollX > 0
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&& rect.top + scrollY < layoutHeight
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&& rect.left + scrollX < layoutWidth;
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};
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const collectVideos = (doc, depth = 0, ancestorVisible = true, videos = [], seen = new Set()) => {
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if (depth >= 4 || typeof doc.querySelectorAll !== 'function') return videos;
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for (const video of doc.querySelectorAll('video')) {
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if (!seen.has(video)) {
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seen.add(video);
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videos.push({ video, ancestorVisible });
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}
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}
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const hosts = doc.querySelectorAll('[id*="player" i], [class*="player" i], [id*="video" i], [class*="video" i], [id*="media" i], [class*="media" i], [id*="stream" i], [class*="stream" i], ytd-player, netflix-player, emby-player, jellyfin-player, video-player');
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for (const host of hosts) {
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if (!host.shadowRoot) continue;
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for (const video of host.shadowRoot.querySelectorAll('video')) {
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if (!seen.has(video)) {
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seen.add(video);
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videos.push({ video, ancestorVisible });
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}
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}
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}
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for (const frame of doc.querySelectorAll('iframe, frame')) {
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try {
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const frameRect = frame.getBoundingClientRect();
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const frameVisible = ancestorVisible && elementIsVisible(frame, frameRect);
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const frameDoc = frame.contentDocument;
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if (frameDoc) collectVideos(frameDoc, depth + 1, frameVisible, videos, seen);
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} catch {
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// Cross-origin media is inspected in its own execution result.
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}
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}
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return videos;
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};
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const videoDetails = collectVideos(document).map(({ video, ancestorVisible }) => {
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const rect = video.getBoundingClientRect();
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const rendered = ancestorVisible && elementIsVisible(video, rect);
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const hasSource = !!(video.currentSrc || video.src || video.srcObject
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|| video.querySelector?.('source[src]'));
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const background = !!video.loop && !!video.muted && !video.controls;
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const duration = Number.isFinite(video.duration) && video.duration > 0 ? video.duration : 0;
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const shortUncontrolled = !video.controls && duration > 0 && duration < 300;
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const renderedArea = Math.max(0, rect.width) * Math.max(0, rect.height);
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return {
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hasSource,
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rendered,
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background,
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shortUncontrolled,
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sizeBucket: Math.round(Math.sqrt(renderedArea) / 40),
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playing: video.paused === false && video.ended !== true,
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controls: !!video.controls,
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readyState: Number.isInteger(video.readyState) ? video.readyState : 0,
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duration,
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renderedArea
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};
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});
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const compareVideo = (left, right) => {
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const leftRank = [
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left.hasSource ? 1 : 0,
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left.rendered ? 1 : 0,
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left.background ? 0 : 1,
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left.shortUncontrolled ? 0 : 1,
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left.playing ? 1 : 0,
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left.controls ? 1 : 0,
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left.readyState,
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left.duration,
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left.sizeBucket
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];
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const rightRank = [
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right.hasSource ? 1 : 0,
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right.rendered ? 1 : 0,
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right.background ? 0 : 1,
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right.shortUncontrolled ? 0 : 1,
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right.playing ? 1 : 0,
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right.controls ? 1 : 0,
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right.readyState,
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right.duration,
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right.sizeBucket
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];
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for (let index = 0; index < leftRank.length; index++) {
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if (leftRank[index] !== rightRank[index]) return rightRank[index] - leftRank[index];
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}
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return 0;
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};
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videoDetails.sort(compareVideo);
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// Recursively list direct and same-origin-descendant frame elements. This
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// lets the background identify a large inaccessible player origin even if
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// an all-frame probe is rejected by the browser's site-access policy.
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const embeddedFrames = [];
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const collectEmbeddedFrames = (doc, depth = 0, ancestorVisible = true) => {
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if (depth >= 4 || typeof doc.querySelectorAll !== 'function') return;
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for (const frame of doc.querySelectorAll('iframe, frame')) {
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const rect = frame.getBoundingClientRect();
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const directVisible = elementIsVisible(frame, rect);
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const visible = ancestorVisible && directVisible;
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let href = '';
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try { href = new URL(frame.src || '', doc.location.href).href; } catch { href = ''; }
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embeddedFrames.push({
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href,
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origin: (() => { try { return new URL(href).origin; } catch { return null; } })(),
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area: Math.max(0, rect.width) * Math.max(0, rect.height),
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width: Math.max(0, rect.width),
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height: Math.max(0, rect.height),
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visible,
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depth: depth + 1,
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mediaHint: frame.allowFullscreen === true
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|| frame.hasAttribute?.('allowfullscreen')
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|| /autoplay|fullscreen|picture-in-picture|encrypted-media/i.test(frame.getAttribute('allow') || '')
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|| /player|video|stream|watch|embed|media|xfp/i.test([
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frame.id,
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frame.name,
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frame.className,
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frame.title,
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href
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].join(' '))
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});
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try {
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const frameDoc = frame.contentDocument;
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if (frameDoc) collectEmbeddedFrames(frameDoc, depth + 1, visible);
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} catch {
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// Cross-origin descendants are represented by their frame URL.
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}
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}
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};
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collectEmbeddedFrames(document);
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const storedParentVisibility = window.__koalaParentFrameVisibility;
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const parentVisibility = expectedVisibilityToken
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&& storedParentVisibility?.token === expectedVisibilityToken
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? storedParentVisibility
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: null;
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return {
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href: window.location.href,
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origin: window.location.origin,
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isTop: window.top === window,
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videoCount: videoDetails.length,
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bestVideo: videoDetails[0] || null,
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frameArea: Math.max(0, window.innerWidth) * Math.max(0, window.innerHeight),
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parentFrameVisible: window.top === window
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? true
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: parentVisibility?.visible ?? null,
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parentFrameArea: window.top === window
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? Math.max(0, window.innerWidth) * Math.max(0, window.innerHeight)
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: (Number.isFinite(parentVisibility?.area) ? parentVisibility.area : null),
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embeddedFrames
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};
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}
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/** Runs inside every frame before the visibility dispatch. */
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export function installParentFrameVisibilityProbe(token) {
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try { window.__koalaFrameVisibilityCleanup?.(); } catch { /* stale probe */ }
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window.__koalaParentFrameVisibility = { token, visible: null, area: null };
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let timeout = null;
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const cleanup = () => {
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window.removeEventListener('message', handler);
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if (timeout !== null) clearTimeout(timeout);
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if (window.__koalaFrameVisibilityCleanup === cleanup) {
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delete window.__koalaFrameVisibilityCleanup;
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}
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};
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const handler = (event) => {
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if (event.source !== window.parent
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|| event.data?.type !== 'KOALASYNC_FRAME_VISIBILITY'
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|| event.data?.token !== token) {
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return;
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}
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window.__koalaParentFrameVisibility = {
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token,
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visible: event.data.visible === true,
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area: Number.isFinite(event.data.area) ? event.data.area : 0
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};
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};
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window.addEventListener('message', handler);
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timeout = setTimeout(cleanup, 1000);
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window.__koalaFrameVisibilityCleanup = cleanup;
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}
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/** Runs inside every frame; each parent reports geometry to its direct children. */
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export function dispatchParentFrameVisibilityProbe(token) {
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const ancestor = window.top === window ? { visible: true, area: Infinity } : window.__koalaParentFrameVisibility;
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for (const frame of document.querySelectorAll('iframe, frame')) {
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try {
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const rect = frame.getBoundingClientRect();
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const style = window.getComputedStyle(frame);
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const area = Math.max(0, rect.width) * Math.max(0, rect.height);
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const layoutWidth = Math.max(window.innerWidth, document.documentElement?.scrollWidth || 0);
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const layoutHeight = Math.max(window.innerHeight, document.documentElement?.scrollHeight || 0);
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const scrollX = Number(window.scrollX) || 0;
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const scrollY = Number(window.scrollY) || 0;
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const intersectsLayout = rect.bottom + scrollY > 0
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&& rect.right + scrollX > 0
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&& rect.top + scrollY < layoutHeight
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&& rect.left + scrollX < layoutWidth;
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const browserReportsVisible = typeof frame.checkVisibility === 'function'
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? frame.checkVisibility({ checkOpacity: true, checkVisibilityCSS: true })
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: true;
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const directlyVisible = area > 0
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&& intersectsLayout
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&& browserReportsVisible
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&& style.display !== 'none'
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&& style.visibility !== 'hidden'
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&& Number(style.opacity) !== 0;
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const visible = directlyVisible && ancestor?.visible !== false;
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const inheritedArea = Number.isFinite(ancestor?.area) ? ancestor.area : area;
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const effectiveArea = Math.min(area, inheritedArea);
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frame.contentWindow?.postMessage({
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type: 'KOALASYNC_FRAME_VISIBILITY',
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token,
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visible,
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area: effectiveArea
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}, '*');
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} catch {
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// A detached or browser-owned frame is not a candidate.
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}
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}
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}
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function mediaCandidateRank(entry) {
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const result = entry.result;
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const video = result.bestVideo;
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const visibility = result.parentFrameVisible === true
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? 2
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: result.parentFrameVisible === false
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? 0
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: 1;
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return [
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visibility,
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video.hasSource ? 1 : 0,
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video.rendered ? 1 : 0,
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video.background ? 0 : 1,
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video.shortUncontrolled ? 0 : 1,
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video.playing ? 1 : 0,
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video.controls ? 1 : 0,
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video.readyState,
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video.duration,
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video.sizeBucket,
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result.isTop ? 1 : 0,
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Number.isFinite(result.parentFrameArea) ? result.parentFrameArea : result.frameArea
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];
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}
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function compareRanks(left, right) {
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const leftRank = mediaCandidateRank(left);
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const rightRank = mediaCandidateRank(right);
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for (let index = 0; index < leftRank.length; index++) {
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if (leftRank[index] !== rightRank[index]) return rightRank[index] - leftRank[index];
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}
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return 0;
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}
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function sameMeaningfulRank(left, right) {
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const leftRank = mediaCandidateRank(left);
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const rightRank = mediaCandidateRank(right);
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// Ignore duration, size, top-frame preference, and raw frame area. Two
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// otherwise identical frames are unsafe to distinguish by preload metadata.
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return leftRank.slice(0, 8).every((value, index) => value === rightRank[index]);
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}
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export function selectMediaFrame(injectionResults) {
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const candidates = (Array.isArray(injectionResults) ? injectionResults : [])
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.filter(entry => Number.isInteger(entry?.frameId)
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&& entry?.result?.bestVideo?.rendered === true)
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.filter(entry => entry.result.parentFrameVisible !== false)
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.sort(compareRanks);
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if (candidates.length === 0) return null;
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if (candidates.length > 1
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&& candidates[0].result.parentFrameVisible !== true
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&& candidates[1].result.parentFrameVisible !== true
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&& sameMeaningfulRank(candidates[0], candidates[1])) {
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return null;
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}
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return candidates[0];
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}
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function findMissingPlayerAccess(results) {
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const accessibleOrigins = new Set();
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for (const entry of results) {
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const origin = safeOrigin(entry?.result?.href);
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if (origin) accessibleOrigins.add(origin);
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}
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const missingByOrigin = new Map();
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for (const entry of results) {
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for (const frame of entry?.result?.embeddedFrames || []) {
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if (!frame.visible || accessibleOrigins.has(frame.origin) || !frame.origin) continue;
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const aspectRatio = frame.height > 0 ? frame.width / frame.height : 0;
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const drivePlayer = isGoogleDrivePlayerUrl(frame.href);
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const looksLikePlayer = frame.mediaHint === true
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&& frame.area >= MIN_PLAYER_FRAME_AREA
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&& aspectRatio >= MIN_PLAYER_ASPECT_RATIO
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&& aspectRatio <= MAX_PLAYER_ASPECT_RATIO;
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if (!drivePlayer && !looksLikePlayer) continue;
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const previous = missingByOrigin.get(frame.origin);
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if (!previous || frame.area > previous.area || drivePlayer) {
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missingByOrigin.set(frame.origin, { ...frame, drivePlayer });
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}
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}
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}
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const missing = Array.from(missingByOrigin.values()).sort((left, right) => {
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if (left.drivePlayer !== right.drivePlayer) return left.drivePlayer ? -1 : 1;
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return right.area - left.area;
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});
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if (missing.length === 0) return null;
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if (!missing[0].drivePlayer && missing.length > 1 && missing[0].area < missing[1].area * 1.5) {
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return null;
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}
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return {
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host: new URL(missing[0].origin).hostname,
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originPattern: originPattern(missing[0].origin),
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area: missing[0].area,
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drivePlayer: missing[0].drivePlayer === true
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};
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}
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function shouldPreferMissingAccess(access, selected) {
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if (!access) return false;
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if (access.drivePlayer || !selected?.result?.bestVideo) return true;
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const video = selected.result.bestVideo;
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if (!video.hasSource || !video.rendered || video.background) return true;
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const selectedArea = Number.isFinite(video.renderedArea) ? video.renderedArea : 0;
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const weakAccessibleCandidate = !video.controls
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&& video.duration > 0
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&& video.duration < 300;
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return weakAccessibleCandidate
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&& access.area >= Math.max(MIN_PLAYER_FRAME_AREA, selectedArea * 1.5);
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}
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function accessRequiredError(access) {
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const error = new Error(`Embedded player access is required for ${access.host}`);
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error.code = MEDIA_FRAME_ACCESS_REQUIRED;
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error.host = access.host;
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error.originPattern = access.originPattern;
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return error;
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}
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function contentTarget(tabId, selected, monitorTargets = null) {
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const frameId = normalizeFrameId(selected?.frameId);
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const documentId = typeof selected?.documentId === 'string' ? selected.documentId : null;
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const target = {
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frameId,
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documentId,
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frameUrl: typeof selected?.result?.href === 'string' ? selected.result.href : null,
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hasVideo: !!selected?.result?.bestVideo,
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scriptTarget: documentId
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? { tabId, documentIds: [documentId] }
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: (frameId === 0 ? { tabId } : { tabId, frameIds: [frameId] })
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};
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if (Array.isArray(monitorTargets) && monitorTargets.length > 0) {
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target.monitorTargets = monitorTargets;
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}
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return target;
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}
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export function listMediaFrameScriptTargets(tabId) {
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return [{ tabId, allFrames: true }];
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}
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function listFrameProbeTargets(tabId, embeddedFrameCount = 0) {
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// Chromium can reject one all-frames executeScript call when a single
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// child frame is browser-owned or temporarily unavailable. Frame IDs are
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// not exposed without webNavigation, so probe a bounded range individually
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// after the top frame tells us that embedded frames exist. Each rejected
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// probe is isolated and cannot hide the other frames.
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const maxFrameId = Math.min(64, Math.max(8, (embeddedFrameCount * 4) + 4));
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return Array.from({ length: maxFrameId }, (_, frameId) => ({
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tabId,
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frameIds: [frameId]
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}));
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}
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function frameScriptTarget(tabId, entry) {
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const frameId = normalizeFrameId(entry?.frameId);
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return typeof entry?.documentId === 'string' && entry.documentId
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? { tabId, documentIds: [entry.documentId] }
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: (frameId === 0 ? { tabId, frameIds: [0] } : { tabId, frameIds: [frameId] });
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}
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function mergeFrameResults(...groups) {
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const merged = new Map();
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for (const group of groups) {
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for (const entry of Array.isArray(group) ? group : []) {
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if (!Number.isInteger(entry?.frameId)) continue;
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// A frame ID identifies the current slot. If its document changed
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// between the broad probe and the exact probe, the exact result
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// must replace the stale document rather than create a duplicate
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// candidate that can trigger a false ambiguity.
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const key = `frame:${entry.frameId}`;
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merged.set(key, entry);
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}
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}
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return Array.from(merged.values());
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}
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async function executeInAccessibleFrames(chromeApi, targets, func, args) {
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const settled = await Promise.all(targets.map(async target => {
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try {
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const result = await chromeApi.scripting.executeScript({ target, func, args });
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return Array.isArray(result) ? result : [];
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|
} catch {
|
|
return [];
|
|
}
|
|
}));
|
|
return settled.flat();
|
|
}
|
|
|
|
export async function resolveMediaContentTarget(chromeApi, tabId, {
|
|
attempts = 8,
|
|
retryDelayMs = 200,
|
|
probeDelayMs = 60
|
|
} = {}) {
|
|
let fallback = null;
|
|
let missingAccess = null;
|
|
let monitorTargets = [];
|
|
|
|
for (let attempt = 0; attempt < attempts; attempt++) {
|
|
const topResults = await executeInAccessibleFrames(
|
|
chromeApi,
|
|
[{ tabId, frameIds: [0] }],
|
|
inspectMediaFrame,
|
|
[null]
|
|
);
|
|
const allFrameResults = await executeInAccessibleFrames(
|
|
chromeApi,
|
|
listMediaFrameScriptTargets(tabId),
|
|
inspectMediaFrame,
|
|
[null]
|
|
);
|
|
let results = mergeFrameResults(topResults, allFrameResults);
|
|
const embeddedFrameCount = topResults.reduce(
|
|
(count, entry) => Math.max(count, entry?.result?.embeddedFrames?.length || 0),
|
|
0
|
|
);
|
|
if (embeddedFrameCount > 0) {
|
|
const individuallyProbed = await executeInAccessibleFrames(
|
|
chromeApi,
|
|
listFrameProbeTargets(tabId, embeddedFrameCount),
|
|
inspectMediaFrame,
|
|
[null]
|
|
);
|
|
results = mergeFrameResults(results, individuallyProbed);
|
|
}
|
|
if (results.length === 0) return contentTarget(tabId, null);
|
|
|
|
if (results.length > 1) {
|
|
const token = `${tabId}:${attempt}:${Date.now()}:${Math.random()}`;
|
|
const frameTargets = results.map(entry => frameScriptTarget(tabId, entry));
|
|
try {
|
|
await executeInAccessibleFrames(
|
|
chromeApi,
|
|
frameTargets,
|
|
installParentFrameVisibilityProbe,
|
|
[token]
|
|
);
|
|
// Four passes match the maximum same-origin recursion depth.
|
|
for (let pass = 0; pass < 4; pass++) {
|
|
await executeInAccessibleFrames(
|
|
chromeApi,
|
|
frameTargets,
|
|
dispatchParentFrameVisibilityProbe,
|
|
[token]
|
|
);
|
|
await new Promise(resolve => setTimeout(resolve, probeDelayMs));
|
|
}
|
|
const inspected = await executeInAccessibleFrames(
|
|
chromeApi,
|
|
frameTargets,
|
|
inspectMediaFrame,
|
|
[token]
|
|
);
|
|
if (inspected.length > 0) results = mergeFrameResults(results, inspected);
|
|
} catch {
|
|
// Initial results remain usable, but equally-ranked unknown
|
|
// frames will be rejected below rather than guessed.
|
|
}
|
|
}
|
|
// Rebuild these after the visibility refresh so a frame navigation that
|
|
// replaced its document ID cannot leave a stale monitor target behind.
|
|
monitorTargets = results.map(entry => frameScriptTarget(tabId, entry));
|
|
|
|
const selected = selectMediaFrame(results);
|
|
const currentMissingAccess = findMissingPlayerAccess(results);
|
|
missingAccess = currentMissingAccess;
|
|
fallback = selected;
|
|
if (selected) {
|
|
if (selected.result.bestVideo.hasSource
|
|
&& selected.result.bestVideo.rendered
|
|
&& !shouldPreferMissingAccess(currentMissingAccess, selected)) {
|
|
return contentTarget(tabId, selected, monitorTargets);
|
|
}
|
|
}
|
|
|
|
if (attempt < attempts - 1) {
|
|
await new Promise(resolve => setTimeout(resolve, retryDelayMs));
|
|
}
|
|
}
|
|
|
|
if (missingAccess) throw accessRequiredError(missingAccess);
|
|
if (fallback) return contentTarget(tabId, fallback, monitorTargets);
|
|
// Selecting a tab must not depend on video detection. A page can be a
|
|
// valid target before its player exists, and an ambiguous frame layout is
|
|
// recoverable through the injected lifecycle monitor. Keep the top-frame
|
|
// target active instead of discarding the user's selection.
|
|
return contentTarget(tabId, null, monitorTargets);
|
|
}
|