Luna/apps/taskbar.cpp

#include <os/File.h>
#include <os/IPC.h>
#include <os/Process.h>
#include <os/ipc/Launcher.h>
#include <signal.h>
#include <sys/wait.h>
#include <ui/App.h>
#include <ui/Button.h>
#include <ui/Container.h>
#include <ui/Image.h>
#include <ui/Layout.h>

static constexpr ui::Color TASKBAR_COLOR = ui::Color::from_rgb(83, 83, 83);

static OwnedPtr<os::IPC::Client> launcher_client;

void sigchld_handler(int)
{
    wait(nullptr);
}

Result<void> create_widget_group_for_app(ui::HorizontalLayout& layout, StringView path, StringView icon)
{
    auto* button = new (std::nothrow) ui::Button({ 0, 0, 50, 50 });
    if (!button) return err(ENOMEM);
    layout.add_widget(*button);

    auto* container = new (std::nothrow)
        ui::Container({ 0, 0, 50, 50 }, ui::VerticalAlignment::Center, ui::HorizontalAlignment::Center);
    if (!container) return err(ENOMEM);
    button->set_widget(*container);
    button->set_action([=] {
        os::Launcher::LaunchDetachedRequest request;
        SET_IPC_STRING(request.command, path.chars());
        launcher_client->send_async(request);
    });

    auto image = TRY(ui::ImageWidget::load(icon));
    container->set_widget(*image);

    image.leak();

    return {};
}

Result<int> luna_main(int, char**)
{
    ui::App app;
    TRY(app.init("/tmp/wsys.sock"));

    TRY(os::EventLoop::the().register_signal_handler(SIGCHLD, sigchld_handler));

    launcher_client = TRY(os::IPC::Client::connect("/tmp/launch.sock", false));

    ui::Rect screen = app.screen_rect();

    ui::Rect bar = ui::Rect { ui::Point { 0, screen.height - 50 }, screen.width, 50 };

    auto window = TRY(ui::Window::create(bar, ui::WindowType::System));
    app.set_main_window(window);

    window->set_background(TASKBAR_COLOR);
    window->set_special_attributes(ui::UNFOCUSEABLE);

    ui::HorizontalLayout layout(ui::Margins { 0, 0, 0, 0 }, ui::AdjustHeight::Yes, ui::AdjustWidth::No);
    window->set_main_widget(layout);

    TRY(create_widget_group_for_app(layout, "/usr/bin/terminal", "/usr/share/icons/32x32/app-terminal.tga"));
    TRY(create_widget_group_for_app(layout, "/usr/bin/about", "/usr/share/icons/32x32/app-about.tga"));
    TRY(create_widget_group_for_app(layout, "/usr/bin/gol", "/usr/share/icons/32x32/app-gol.tga"));
    TRY(create_widget_group_for_app(layout, "/usr/bin/clock", "/usr/share/icons/32x32/app-clock.tga"));

    return app.run();
}