Class ActivityAMP

app/src/main/java/eu/faircode/email/ActivityAMP.java:56–301

import java.util.Locale;

public class ActivityAMP extends ActivityBase {
    private WebView wvAmp;
    private ContentLoadingProgressBar pbWait;
    private Group grpReady;

    private boolean force_light = false;

    private static final List<String> ALLOWED_SCRIPT_HOSTS = Collections.unmodifiableList(Arrays.asList(
            "cdn.ampproject.org"
    ));

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (savedInstanceState != null)
            force_light = savedInstanceState.getBoolean("fair:force_light");

        View view = LayoutInflater.from(this).inflate(R.layout.activity_amp, null);
        setContentView(view);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        wvAmp = findViewById(R.id.wvAmp);
        pbWait = findViewById(R.id.pbWait);
        grpReady = findViewById(R.id.grpReady);

        wvAmp.clearCache(true);

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        boolean overview_mode = prefs.getBoolean("overview_mode", false);
        boolean safe_browsing = prefs.getBoolean("safe_browsing", false);

        WebSettings settings = wvAmp.getSettings();
        settings.setUserAgentString(WebViewEx.getUserAgent(this, wvAmp));
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(overview_mode);

        settings.setBuiltInZoomControls(true);
        settings.setDisplayZoomControls(false);

        settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.TEXT_AUTOSIZING);

        settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);

        if (WebViewEx.isFeatureSupported(this, WebViewFeature.SAFE_BROWSING_ENABLE))
            WebSettingsCompat.setSafeBrowsingEnabled(settings, safe_browsing);
        if (WebViewEx.isFeatureSupported(this, WebViewFeature.ATTRIBUTION_REGISTRATION_BEHAVIOR))
            WebSettingsCompat.setAttributionRegistrationBehavior(settings, WebSettingsCompat.ATTRIBUTION_BEHAVIOR_DISABLED);

        setDarkMode();

        settings.setLoadsImagesAutomatically(true);
        settings.setBlockNetworkLoads(false);
        settings.setBlockNetworkImage(false);
        settings.setAllowFileAccess(false);
        settings.setJavaScriptEnabled(true);