+++ /dev/null
-/*
- * Jexer - Java Text User Interface
- *
- * The MIT License (MIT)
- *
- * Copyright (C) 2019 Kevin Lamonte
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * @author Kevin Lamonte [kevin.lamonte@gmail.com]
- * @version 1
- */
-package jexer.backend;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import jexer.event.TCommandEvent;
-import jexer.event.TInputEvent;
-import static jexer.TCommand.*;
-
-/**
- * MultiBackend mirrors its I/O to several backends.
- */
-public class MultiBackend implements Backend {
-
- // ------------------------------------------------------------------------
- // Variables --------------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * The screen to use.
- */
- private MultiScreen multiScreen;
-
- /**
- * The list of backends to use.
- */
- private List<Backend> backends = new ArrayList<Backend>();
-
- /**
- * The SessionInfo to return.
- */
- private SessionInfo sessionInfo;
-
- // ------------------------------------------------------------------------
- // Constructors -----------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Public constructor requires one backend. Note that this backend's
- * screen will be replaced with a MultiScreen.
- *
- * @param backend the backend to add
- */
- public MultiBackend(final Backend backend) {
- backends.add(backend);
- if (backend instanceof TWindowBackend) {
- multiScreen = new MultiScreen(((TWindowBackend) backend).getOtherScreen());
- } else {
- multiScreen = new MultiScreen(backend.getScreen());
- }
- if (backend instanceof GenericBackend) {
- ((GenericBackend) backend).abortOnDisconnect = false;
- }
- sessionInfo = backend.getSessionInfo();
- }
-
- // ------------------------------------------------------------------------
- // Backend ----------------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Getter for sessionInfo.
- *
- * @return the SessionInfo
- */
- public SessionInfo getSessionInfo() {
- return sessionInfo;
- }
-
- /**
- * Getter for screen.
- *
- * @return the Screen
- */
- public Screen getScreen() {
- return multiScreen;
- }
-
- /**
- * Subclasses must provide an implementation that syncs the logical
- * screen to the physical device.
- */
- public void flushScreen() {
- for (Backend backend: backends) {
- backend.flushScreen();
- }
- }
-
- /**
- * Check if there are events in the queue.
- *
- * @return if true, getEvents() has something to return to the application
- */
- public boolean hasEvents() {
- if (backends.size() == 0) {
- return true;
- }
- for (Backend backend: backends) {
- if (backend.hasEvents()) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * Subclasses must provide an implementation to get keyboard, mouse, and
- * screen resize events.
- *
- * @param queue list to append new events to
- */
- public void getEvents(List<TInputEvent> queue) {
- List<Backend> backendsToRemove = null;
- for (Backend backend: backends) {
- if (backend.hasEvents()) {
- backend.getEvents(queue);
-
- // This default backend assumes a single user, and if that
- // user becomes disconnected we should terminate the
- // application.
- if (queue.size() > 0) {
- TInputEvent event = queue.get(queue.size() - 1);
- if (event instanceof TCommandEvent) {
- TCommandEvent command = (TCommandEvent) event;
- if (command.equals(cmBackendDisconnect)) {
- if (backendsToRemove == null) {
- backendsToRemove = new ArrayList<Backend>();
- }
- backendsToRemove.add(backend);
- }
- }
- }
- }
- }
- if (backendsToRemove != null) {
- for (Backend backend: backendsToRemove) {
- multiScreen.removeScreen(backend.getScreen());
- backends.remove(backend);
- backend.shutdown();
- }
- }
- if (backends.size() == 0) {
- queue.add(new TCommandEvent(cmAbort));
- }
- }
-
- /**
- * Subclasses must provide an implementation that closes sockets,
- * restores console, etc.
- */
- public void shutdown() {
- for (Backend backend: backends) {
- backend.shutdown();
- }
- }
-
- /**
- * Subclasses must provide an implementation that sets the window title.
- *
- * @param title the new title
- */
- public void setTitle(final String title) {
- for (Backend backend: backends) {
- backend.setTitle(title);
- }
- }
-
- /**
- * Set listener to a different Object.
- *
- * @param listener the new listening object that run() wakes up on new
- * input
- */
- public void setListener(final Object listener) {
- for (Backend backend: backends) {
- backend.setListener(listener);
- }
- }
-
- /**
- * Reload backend options from System properties.
- */
- public void reloadOptions() {
- for (Backend backend: backends) {
- backend.reloadOptions();
- }
- }
-
- // ------------------------------------------------------------------------
- // MultiBackend -----------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Add a backend to the list.
- *
- * @param backend the backend to add
- */
- public void addBackend(final Backend backend) {
- backends.add(backend);
- if (backend instanceof TWindowBackend) {
- multiScreen.addScreen(((TWindowBackend) backend).getOtherScreen());
- } else {
- multiScreen.addScreen(backend.getScreen());
- }
- if (backend instanceof GenericBackend) {
- ((GenericBackend) backend).abortOnDisconnect = false;
- }
- }
-
- /**
- * Remove a backend from the list.
- *
- * @param backend the backend to remove
- */
- public void removeBackend(final Backend backend) {
- if (backends.size() > 1) {
- if (backend instanceof TWindowBackend) {
- multiScreen.removeScreen(((TWindowBackend) backend).getOtherScreen());
- } else {
- multiScreen.removeScreen(backend.getScreen());
- }
- backends.remove(backend);
- }
- }
-
-}
git://git.nikiroo.be / fanfix.git / blobdiff