Function createPolicy

Picviewer CE+/dist.user.js:12740–12766

()

    }

    async function createPolicy() {
        if (!(unsafeWindow.trustedTypes && unsafeWindow.trustedTypes.createPolicy && isTrustedTypesEnforced())) {
            return;
        }

        const { names: allowedNames, allowDuplicates, ttDirectiveFound } = await getCspTrustedTypesInfo();

        if (ttDirectiveFound && !allowDuplicates) {
            debug("CSP Trusted Types is enforced without 'allow-duplicates'. " +
                         "Skipping policy creation to avoid conflicts with the page.");
            return;
        }

        const MY_POLICY_NAME = 'pvcep_default';

        try {
            escapeHTMLPolicy = unsafeWindow.trustedTypes.createPolicy(MY_POLICY_NAME, {
                createHTML: (string, sink) => string,
                createScriptURL: string => string,
                createScript: string => string
            });
            escapeHTMLCreator = escapeHTMLPolicy.createHTML;
            return;
        } catch (e) {
        }
        debug("Could not create any trusted types policy.");
    }

    let escapeHTMLPolicy = null;
    let escapeHTMLCreator = null;