RegExWebEngineProfile.cpp

/*
 * Copyright (C) 2020 Adrian Carpenter
 *
 * This file is part of a regex101.com offline application.
 *
 * https://github.com/fizzyade/regex101
 *
 * =====================================================================
 * The regex101 web content is owned and used with permission from
 * Firas Dib at regex101.com.  This application is an unofficial
 * tool to provide an offline application version of the website.
 * =====================================================================
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "RegExWebEngineProfile.h"

#include <QDir>
#include <QStandardPaths>
#include <QWebEngineScript>
#include <QWebEngineScriptCollection>
#include <QWebEngineSettings>

constexpr auto webFilesPrefix = "/regex101";

Nedrysoft::RegExWebEngineProfile::RegExWebEngineProfile(QObject *parent) :
    QWebEngineProfile(parent),
    m_schemeHandler(new Nedrysoft::RegExUrlSchemeHandler(webFilesPrefix))
{
    QString injectedScript;
    QWebEngineScript script;

    installUrlSchemeHandler(RegExUrlSchemeHandler::name().toUtf8(), m_schemeHandler);

    setHttpCacheType(QWebEngineProfile::NoCache);

    settings()->setAttribute(QWebEngineSettings::LocalContentCanAccessRemoteUrls, true);
    settings()->setAttribute(QWebEngineSettings::LocalContentCanAccessFileUrls, true);
    settings()->setAttribute(QWebEngineSettings::AllowRunningInsecureContent, true);
    settings()->setAttribute(QWebEngineSettings::JavascriptEnabled, true);
    settings()->setAttribute(QWebEngineSettings::JavascriptCanOpenWindows, true);

    settings()->setUnknownUrlSchemePolicy(QWebEngineSettings::AllowAllUnknownUrlSchemes);

    injectedScript += readFile(":/regex101/qwebchannel.js");
    injectedScript += readFile(":/regex101/regexbridge.js");

    script.setSourceCode(injectedScript);
    script.setName("bridge.js");
    script.setWorldId(QWebEngineScript::MainWorld);
    script.setInjectionPoint(QWebEngineScript::DocumentCreation);
    script.setRunsOnSubFrames(false);

    scripts()->insert(script);
}

QString Nedrysoft::RegExWebEngineProfile::readFile(QString filename)
{
    QFile file(filename);

    if (file.open(QFile::ReadOnly)) {
        return file.readAll();
    }

    return QString();
}