--- /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