269 lines
5.4 KiB
C++
269 lines
5.4 KiB
C++
/*
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* \brief Menu dialog
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* \author Norman Feske
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* \date 2014-10-04
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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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#ifndef _MENU_DIALOG_H_
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#define _MENU_DIALOG_H_
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/* Genode includes */
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#include <timer_session/connection.h>
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/* local includes */
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#include <fading_dialog.h>
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#include <subsystem_manager.h>
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#include <context_dialog.h>
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namespace Launcher { struct Menu_dialog; }
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class Launcher::Menu_dialog : Input_event_handler, Dialog_generator,
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Hover_handler, Dialog_model
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{
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public:
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struct Response_handler
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{
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virtual void handle_selection(Label const &) = 0;
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virtual void handle_menu_leave() = 0;
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virtual void handle_menu_motion() = 0;
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};
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private:
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Response_handler &_response_handler;
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typedef String<128> Title;
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struct Element : List<Element>::Element
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{
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Label label;
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Title title;
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bool hovered = false;
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bool touched = false;
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bool running = false;
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Element(Xml_node node)
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:
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label(Decorator::string_attribute(node, "name", Label(""))),
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title(Decorator::string_attribute(node, "title", Title(label.string())))
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{ }
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};
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List<Element> _elements;
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void _generate_dialog_elements(Xml_generator &xml)
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{
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for (Element const *e = _elements.first(); e; e = e->next()) {
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xml.node("button", [&] () {
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xml.attribute("name", e->label.string());
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if ((e->hovered)
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|| (e->hovered && e->touched))
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xml.attribute("hovered", "yes");
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if (e->running || e->touched)
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xml.attribute("selected", "yes");
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xml.node("label", [&] () {
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xml.attribute("text", e->title.string());
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});
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});
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}
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}
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Fading_dialog::Position _position { 0 - 4, 28 - 4 };
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Fading_dialog _dialog;
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Rect _hovered_rect;
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bool _open = false;
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unsigned _key_cnt = 0;
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Label _hovered() const
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{
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for (Element const *e = _elements.first(); e; e = e->next())
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if (e->hovered)
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return e->label;
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return Label("");
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}
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public:
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Menu_dialog(Server::Entrypoint &ep, Cap_session &cap, Ram_session &ram,
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Report_rom_slave &report_rom_slave,
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Response_handler &response_handler)
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:
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_response_handler(response_handler),
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_dialog(ep, cap, ram, report_rom_slave, "menu_dialog", "menu_hover",
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*this, *this, *this, *this,
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_position)
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{
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}
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/**
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* Dialog_generator interface
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*/
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void generate_dialog(Xml_generator &xml) override
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{
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xml.node("frame", [&] () {
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xml.node("vbox", [&] () {
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_generate_dialog_elements(xml);
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});
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});
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}
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Rect _hovered_button_rect(Xml_node hover) const
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{
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Point p(0, 0);
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for (;; hover = hover.sub_node()) {
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p = p + Point(point_attribute(hover));
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if (hover.has_type("button"))
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return Rect(p, area_attribute(hover));
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if (!hover.num_sub_nodes())
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break;
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}
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return Rect();
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}
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/**
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* Hover_handler interface
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*/
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void hover_changed(Xml_node hover) override
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{
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Label const old_hovered = _hovered();
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for (Element *e = _elements.first(); e; e = e->next())
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e->hovered = false;
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try {
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Xml_node button = hover.sub_node("dialog")
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.sub_node("frame")
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.sub_node("vbox")
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.sub_node("button");
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for (Element *e = _elements.first(); e; e = e->next()) {
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Label const label =
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Decorator::string_attribute(button, "name", Label(""));
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if (e->label == label) {
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e->hovered = true;
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_hovered_rect = _hovered_button_rect(hover);
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}
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}
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} catch (Xml_node::Nonexistent_sub_node) { }
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Label const new_hovered = _hovered();
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if (old_hovered != new_hovered)
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dialog_changed();
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}
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/**
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* Input_event_handler interface
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*/
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bool handle_input_event(Input::Event const &ev) override
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{
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if (ev.type() == Input::Event::LEAVE) {
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_response_handler.handle_menu_leave();
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return false;
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}
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if (ev.type() == Input::Event::MOTION) {
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_response_handler.handle_menu_motion();
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/*
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* Re-enable the visibility of the menu if we detect motion
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* events over the menu. This way, it reappears in situations
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* where the pointer temporarily leaves the view and returns.
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*/
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if (_open)
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visible(true);
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return true;
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}
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if (ev.type() == Input::Event::PRESS) _key_cnt++;
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if (ev.type() == Input::Event::RELEASE) _key_cnt--;
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if (ev.type() == Input::Event::PRESS
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&& ev.keycode() == Input::BTN_LEFT
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&& _key_cnt == 1) {
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_response_handler.handle_selection(_hovered());
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}
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return false;
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}
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void visible(bool visible)
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{
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if (visible == _dialog.visible())
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return;
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_dialog.visible(visible);
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if (visible)
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_open = true;
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}
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void close()
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{
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_open = false;
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visible(false);
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}
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void running(Label const &label, bool running)
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{
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for (Element *e = _elements.first(); e; e = e->next())
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if (e->label == label)
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e->running = running;
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_dialog.update();
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}
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void update(Xml_node subsystems)
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{
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if (_elements.first()) {
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PERR("subsequent updates are not supported");
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return;
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}
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Element *last = nullptr;
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subsystems.for_each_sub_node("subsystem",
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[&] (Xml_node subsystem)
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{
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Element * const e = new (env()->heap()) Element(subsystem);
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_elements.insert(e, last);
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last = e;
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});
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_dialog.update();
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}
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};
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#endif /* _MENU_DIALOG_H_ */
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