157 lines
3.5 KiB
C++
157 lines
3.5 KiB
C++
/*
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* \brief Launcher
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* \author Norman Feske
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* \date 2014-09-30
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <os/server.h>
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#include <os/config.h>
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#include <cap_session/connection.h>
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#include <decorator/xml_utils.h>
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#include <util/volatile_object.h>
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#include <os/attached_rom_dataspace.h>
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#include <nitpicker_session/connection.h>
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/* local includes */
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#include <menu_dialog.h>
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namespace Launcher { struct Main; }
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struct Launcher::Main
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{
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Server::Entrypoint ep;
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Genode::Cap_connection cap;
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char const *report_rom_config =
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"<config> <rom>"
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" <policy label=\"menu_dialog\" report=\"menu_dialog\"/>"
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" <policy label=\"menu_hover\" report=\"menu_hover\"/>"
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" <policy label=\"context_dialog\" report=\"context_dialog\"/>"
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" <policy label=\"context_hover\" report=\"context_hover\"/>"
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"</rom> </config>";
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Report_rom_slave report_rom_slave = { cap, *env()->ram_session(), report_rom_config };
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/**
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* Nitpicker session used to perform session-control operations on the
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* subsystem's nitpicker sessions.
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*/
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Nitpicker::Connection nitpicker;
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Genode::Signal_rpc_member<Main> _exited_child_dispatcher =
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{ ep, *this, &Main::_handle_exited_child };
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Subsystem_manager subsystem_manager { ep, cap, _exited_child_dispatcher };
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Menu_dialog menu_dialog { ep, cap, *env()->ram_session(), report_rom_slave,
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subsystem_manager, nitpicker };
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Lazy_volatile_object<Attached_rom_dataspace> xray_rom_ds;
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enum Visibility { VISIBILITY_ALWAYS, VISIBILITY_XRAY };
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Visibility visibility = VISIBILITY_ALWAYS;
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void handle_config(unsigned);
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Genode::Signal_rpc_member<Main> xray_update_dispatcher =
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{ ep, *this, &Main::handle_xray_update };
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void handle_xray_update(unsigned);
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void _handle_exited_child(unsigned)
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{
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auto kill_child_fn = [&] (Child_base::Label label) { menu_dialog.kill(label); };
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subsystem_manager.for_each_exited_child(kill_child_fn);
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}
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/**
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* Constructor
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*/
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Main(Server::Entrypoint &ep) : ep(ep)
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{
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handle_config(0);
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if (visibility == VISIBILITY_ALWAYS)
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menu_dialog.visible(true);
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}
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};
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void Launcher::Main::handle_config(unsigned)
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{
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config()->reload();
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/* set default visibility */
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visibility = VISIBILITY_ALWAYS;
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/* obtain model about nitpicker's xray mode */
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if (config()->xml_node().has_attribute("visibility")) {
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if (config()->xml_node().attribute("visibility").has_value("xray")) {
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xray_rom_ds.construct("xray");
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xray_rom_ds->sigh(xray_update_dispatcher);
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visibility = VISIBILITY_XRAY;
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/* manually import the initial xray state */
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handle_xray_update(0);
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}
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}
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menu_dialog.update();
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}
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void Launcher::Main::handle_xray_update(unsigned)
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{
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xray_rom_ds->update();
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if (!xray_rom_ds->is_valid()) {
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PWRN("could not access xray info");
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menu_dialog.visible(false);
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return;
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}
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Xml_node xray(xray_rom_ds->local_addr<char>());
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bool const visible = xray.has_attribute("enabled")
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&& xray.attribute("enabled").has_value("yes");
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menu_dialog.visible(visible);
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}
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/************
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** Server **
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************/
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namespace Server {
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char const *name() { return "desktop_ep"; }
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size_t stack_size() { return 4*1024*sizeof(long); }
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void construct(Entrypoint &ep)
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{
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/* look for dynamic linker */
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try {
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static Rom_connection rom("ld.lib.so");
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Process::dynamic_linker(rom.dataspace());
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} catch (...) { }
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static Launcher::Main desktop(ep);
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}
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}
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