ladybird/Userland/Utilities/chres.cpp
Lucas CHOLLET 1a97382305 LibGUI: Make Application's construction fallible
The pattern to construct `Application` was to use the `try_create`
method from the `C_OBJECT` macro. While being safe from an OOM
perspective, this method doesn't propagate errors from the constructor.
This patch make `Application` use the `C_OBJECT_ABSTRACT` and manually
define a `create` method that can bubble up errors from the
construction stage.

This commit also removes the ability to use `argc` and `argv` to
create an `Application`, only `Main`'s `Arguments` can be used.

From a user point of view, the patch renames `try_create` => `create`,
hence the huge number of modified files.
2023-05-05 16:41:21 +01:00

45 lines
1.6 KiB
C++

/*
* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibGUI/Application.h>
#include <LibGUI/ConnectionToWindowServer.h>
#include <LibMain/Main.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
int screen = 0;
int width = -1;
int height = -1;
int scale = -1;
Core::ArgsParser args_parser;
args_parser.set_general_help("Change the screen resolution.");
args_parser.add_option(screen, "Screen", "screen", 's', "screen");
args_parser.add_positional_argument(width, "Width", "width");
args_parser.add_positional_argument(height, "Height", "height");
args_parser.add_positional_argument(scale, "Scale Factor", "scale", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
// A Core::EventLoop is all we need, but ConnectionToWindowServer needs a full Application object.
auto app = TRY(GUI::Application::create(arguments));
auto screen_layout = GUI::ConnectionToWindowServer::the().get_screen_layout();
if (screen < 0 || (size_t)screen >= screen_layout.screens.size()) {
warnln("invalid screen index: {}", screen);
return 1;
}
auto& main_screen = screen_layout.screens[screen];
main_screen.resolution = { width, height };
if (scale != -1)
main_screen.scale_factor = scale;
auto set_result = GUI::ConnectionToWindowServer::the().set_screen_layout(screen_layout, true);
if (!set_result.success()) {
warnln("failed to set resolution: {}", set_result.error_msg());
return 1;
}
return 0;
}