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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package org.libreoffice.impressremote.communication;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import android.text.TextUtils;
import android.util.Base64;
public class MessagesReceiver implements Runnable {
private final BufferedReader mMessagesReader;
private final MessagesListener mMessagesListener;
public MessagesReceiver(ServerConnection aServerConnection, MessagesListener aMessagesListener) {
mMessagesReader = buildMessagesReader(aServerConnection);
mMessagesListener = aMessagesListener;
Thread mMessagesListenerThread = new Thread(this);
mMessagesListenerThread.start();
}
private BufferedReader buildMessagesReader(ServerConnection aServerConnection) {
try {
InputStream aMessagesStream = aServerConnection.buildMessagesStream();
return new BufferedReader(
new InputStreamReader(aMessagesStream, Protocol.CHARSET));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Unable to create messages reader.");
}
}
@Override
public void run() {
while (true) {
List<String> aMessage = readMessage();
if (aMessage == null) {
return;
}
parseMessage(aMessage);
}
}
private List<String> readMessage() {
List<String> aMessage = new ArrayList<String>();
String aMessageParameter = readMessageParameter();
while (true) {
if (aMessageParameter == null) {
break;
}
if (TextUtils.isEmpty(aMessageParameter)) {
break;
}
aMessage.add(aMessageParameter);
aMessageParameter = readMessageParameter();
}
if (aMessageParameter == null) {
return null;
}
return aMessage;
}
private String readMessageParameter() {
try {
return mMessagesReader.readLine();
} catch (IOException e) {
return null;
}
}
private void parseMessage(List<String> aMessage) {
if (aMessage.isEmpty()) {
return;
}
String aMessageType = aMessage.get(0);
if (Protocol.Messages.VALIDATING.equals(aMessageType)) {
mMessagesListener.onPinValidation();
return;
}
if (Protocol.Messages.PAIRED.equals(aMessageType)) {
mMessagesListener.onSuccessfulPairing();
return;
}
if (Protocol.Messages.SLIDESHOW_STARTED.equals(aMessageType)) {
int aSlidesCount = parseSlidesCount(aMessage, 1);
int aCurrentSlideIndex = parseSlideIndex(aMessage, 2);
mMessagesListener.onSlideShowStart(aSlidesCount, aCurrentSlideIndex);
return;
}
if (Protocol.Messages.SLIDESHOW_FINISHED.equals(aMessageType)) {
mMessagesListener.onSlideShowFinish();
return;
}
if (Protocol.Messages.SLIDE_UPDATED.equals(aMessageType)) {
int aCurrentSlideIndex = parseSlideIndex(aMessage, 1);
mMessagesListener.onSlideChanged(aCurrentSlideIndex);
return;
}
if (Protocol.Messages.SLIDE_PREVIEW.equals(aMessageType)) {
int aSlideIndex = parseSlideIndex(aMessage, 1);
byte[] aSlidePreview = parseSlidePreview(aMessage, 2);
mMessagesListener.onSlidePreview(aSlideIndex, aSlidePreview);
return;
}
if (Protocol.Messages.SLIDE_NOTES.equals(aMessageType)) {
int aSlideIndex = parseSlideIndex(aMessage, 1);
String aSlideNotes = parseSlideNotes(aMessage, 2);
mMessagesListener.onSlideNotes(aSlideIndex, aSlideNotes);
}
}
private int parseSlidesCount(List<String> aMessage, int aMessageParameterIndex) {
return Integer.parseInt(aMessage.get(aMessageParameterIndex));
}
private int parseSlideIndex(List<String> aMessage, int aMessageParameterIndex) {
return Integer.parseInt(aMessage.get(aMessageParameterIndex));
}
private byte[] parseSlidePreview(List<String> aMessage, int aMessageParameterIndex) {
String aPreviewAsString = aMessage.get(aMessageParameterIndex);
return Base64.decode(aPreviewAsString, Base64.DEFAULT);
}
private String parseSlideNotes(List<String> aMessage, int aMessageParameterIndex) {
StringBuilder aNotesBuilder = new StringBuilder();
for (int aNoteIndex = aMessageParameterIndex; aNoteIndex < aMessage.size(); aNoteIndex++) {
aNotesBuilder.append(aMessage.get(aNoteIndex));
}
return aNotesBuilder.toString();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|