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/**
* Copyright (C) 2021-2024 Saturneric <eric@bktus.com>
*
* This file is part of GpgFrontend.
*
* GpgFrontend 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.
*
* GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <eric@bktus.com> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include <GFModule.h>
#include <QAction>
#include <QApplication>
#include <QMainWindow>
#include <QMenu>
#include <QPointer>
#include "GFModuleIdentity.h"
#include "PGPInspectDialog.h"
namespace {
/// The ceiling on what is read out of a tab. Past this, the menu entry stays
/// greyed out rather than making every menu opening pay for a packet walk.
constexpr qint64 kMaxInspectSize = 16LL * 1024 * 1024;
/// The current tab's document, or an invalid one when there is nothing to
/// show. Cheap enough to run when the menu opens: the walk is a linear pass
/// over at most kMaxInspectSize bytes and decrypts nothing.
auto InspectCurrentTab() -> PGPInspectDocument {
const auto bytes = PGPInspectCurrentTabBytes();
if (bytes.isEmpty() || bytes.size() > kMaxInspectSize) return {};
return PGPInspectBytes(bytes);
}
void RaiseInspectDialog(QWidget *parent) {
const auto bytes = PGPInspectCurrentTabBytes();
auto *dialog =
new PGPInspectDialog(PGPInspectBytes(bytes), bytes.size(), parent);
dialog->setModal(false);
dialog->show();
}
} // namespace
auto OnActivate() -> GFResult {
// Nothing to register with the host: the module owns no settings page, no
// tab view and no metatype. Its whole surface is one menu action, added
// when the menu is mounted.
return GFResult::Ok();
}
auto OnMainWindowMenuMounted(const GFEvent &event) -> GFEventResult {
QMainWindow *main_window = nullptr;
if (auto r = event.RequireGui("main_window", main_window); !r.ok) return r;
QMenu *advance_menu = nullptr;
if (auto r = event.RequireGui("advance_menu", advance_menu); !r.ok) return r;
LOG_DEBUG("adding openpgp structure inspector to the advanced menu");
QMetaObject::invokeMethod(
QApplication::instance(),
[=]() -> void {
auto *action = new QAction(
QCoreApplication::translate("GTrC", "Inspect OpenPGP Structure"),
nullptr);
action->setToolTip(QCoreApplication::translate(
"GTrC",
"Show the packet structure of the current tab, without "
"decrypting it"));
QObject::connect(action, &QAction::triggered, main_window,
[=]() { RaiseInspectDialog(main_window); });
advance_menu->addAction(action);
// Decided when the menu opens rather than once at mount time: what
// the current tab holds changes constantly, and an entry that is
// enabled over plain text promises a window that would have nothing
// in it.
QPointer<QAction> guarded(action);
QObject::connect(advance_menu, &QMenu::aboutToShow, action, [guarded] {
if (guarded.isNull()) return;
guarded->setEnabled(PGPInspectHasStructure(InspectCurrentTab()));
});
},
Qt::BlockingQueuedConnection);
return GFEventResult::Ok();
}
// The module's whole framework surface: which events it handles, what runs at
// each lifecycle point, and one forwarder to the runtime that implements all
// of it. Everything above is business logic.
constexpr GFEventBinding kEvents[] = {
{"MAINWINDOW_MENU_MOUNTED", &OnMainWindowMenuMounted},
};
constexpr GFModuleHooks kHooks = {
sizeof(GFModuleHooks),
GF_MODULE_ID,
GF_MODULE_VERSION,
GF_MODULE_TRANSLATION_CONTEXT,
&OnActivate,
nullptr, // nothing registered with the host, so nothing to undo
nullptr,
kEvents,
std::size(kEvents),
};
extern "C" GF_MODULE_EXPORT auto GFModuleGetApi(uint32_t abi)
-> const GFModuleApi * {
return GFModuleRuntimeGetApi(abi, &kHooks);
}
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