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/**
* This file is part of Haketilo.
*
* Function: Handle page actions in a content script.
*
* Copyright (C) 2021 Wojtek Kosior
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* As a special exception to the GPL, any HTML file which merely
* makes function calls to this code, and for that purpose
* includes it by reference shall be deemed a separate work for
* copyright law purposes. If you modify this code, you may extend
* this exception to your version of the code, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use this code in a
* proprietary program, I am not going to enforce this in court.
*/
/*
* IMPORTS_START
* IMPORT CONNECTION_TYPE
* IMPORT browser
* IMPORT report_script
* IMPORT report_document_type
* IMPORTS_END
*/
let policy;
/* Snapshot url and content type early; these can be changed by other code. */
let url;
let is_html;
let port;
let loaded = false;
let scripts_awaiting = [];
function handle_message(message)
{
const [action, data] = message;
if (action === "inject") {
for (let script_text of data) {
if (loaded)
add_script(script_text);
else
scripts_awaiting.push(script_text);
}
}
else {
console.error(`Bad page action '${action}'.`);
}
}
function document_ready(event)
{
loaded = true;
for (let script_text of scripts_awaiting)
add_script(script_text);
scripts_awaiting = undefined;
}
function add_script(script_text)
{
if (!is_html)
return;
let script = document.createElement("script");
script.textContent = script_text;
script.setAttribute("nonce", policy.nonce);
script.haketilo_payload = true;
document.body.appendChild(script);
report_script(script_text);
}
function handle_page_actions(_policy, doc_ready_promise) {
policy = _policy;
url = document.URL;
is_html = document instanceof HTMLDocument;
report_document_type(is_html);
doc_ready_promise.then(document_ready);
if (policy.payload) {
port = browser.runtime.connect({name : CONNECTION_TYPE.PAGE_ACTIONS});
port.onMessage.addListener(handle_message);
port.postMessage({payload: policy.payload});
}
}
/*
* EXPORTS_START
* EXPORT handle_page_actions
* EXPORTS_END
*/
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