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index.html
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<!--
Copyright (C) 2014 Florian Höch.
Based on https://github.com/googlecast/CastHelloText-chrome/chromehellotext.html
Copyright (C) 2014 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!DOCTYPE html>
<html>
<head>
<title>Chromecast Pattern Generator Test</title>
<style type="text/css">
html, body, #wrapper {
font-family: sans-serif;
font-size: x-large;
height: 100%;
width: 100%;
margin: 0;
padding: 0;
border: 0;
}
#wrapper > tbody > tr > td {
line-height: 1.4em;
text-align: center;
vertical-align: middle;
}
td table {
margin: 1.4em auto;
width: auto;
}
td table td,
th {
padding-right: .5em;
text-align: left;
}
code {
background: #eee;
color: #333;
border-radius: 5px;
padding: 0 .2em;
}
code, input[type="text"], textarea {
font-family: Consolas, Andale Mono, Monaco, Lucida Console, monospace;
}
h1 {
font-weight: normal;
}
input, button, textarea {
font-size: x-large;
}
input[type="text"],
textarea {
border: 2px solid #cccccc;
border-radius: 5px;
padding: 0 .2em;
}
input[type="text"]:focus,
textarea:focus {
border-color: #8ecaed;
box-shadow: 0 0 5px #8ecaed;
outline: none;
}
</style>
<script type="text/javascript" src="//www.gstatic.com/cv/js/sender/v1/cast_sender.js"></script>
<script>
var applicationID = 'B5C2CBFC',
namespace = 'urn:x-cast:net.hoech.cast.patterngenerator',
session,
requestId = 0;
// Call initialization for Cast
if (!chrome.cast || !chrome.cast.isAvailable)
setTimeout(initializeCastApi, 1000);
// Initialization
function initializeCastApi() {
var sessionRequest = new chrome.cast.SessionRequest(applicationID),
apiConfig = new chrome.cast.ApiConfig(sessionRequest,
sessionListener,
receiverListener);
chrome.cast.initialize(apiConfig, onInitSuccess, onError);
};
// Initialization success callback
function onInitSuccess() {
console.log('onInitSuccess');
}
// Initialization error callback
function onError(message) {
console.log('onError: ' + JSON.stringify(message));
}
// Generic success callback
function onSuccess(message) {
console.log("Message sent successfully: ", message);
}
// Session listener during initialization
function sessionListener(e) {
console.log('New session ID:' + e.sessionId);
session = e;
session.addUpdateListener(sessionUpdateListener);
session.addMessageListener(namespace, receiverMessage);
}
// Listener for session updates
function sessionUpdateListener(isAlive) {
var message = isAlive ? 'Session updated' : 'Session removed';
message += ': ' + session.sessionId;
console.log(message);
if (!isAlive) session = null;
};
/**
* Utility function to log messages from the receiver
* @param {string} namespace The namespace of the message
* @param {string} message A message string
*/
function receiverMessage(namespace, message) {
console.log('receiverMessage: ' + namespace + ', ' + message);
};
// Receiver listener during initialization
function receiverListener(e) {
if( e === 'available' ) console.log('Receiver found');
else console.log('Receiver list empty');
}
// Send data to receiver
function send(data) {
if (session) _send(data);
else {
chrome.cast.requestSession(function (e) {
sessionListener(e);
_send(data);
}, onError);
}
}
var queue;
function _send(data) {
var chunk, chunksize = 59936,
msg, n, part, parts;
if (!data) data = {
"foreground": document.getElementById('foreground').value,
"background": document.getElementById('background').value,
"offset": [parseFloat(document.getElementById('offset_h').value),
parseFloat(document.getElementById('offset_v').value)],
"scale": [parseFloat(document.getElementById('scale_h').value),
parseFloat(document.getElementById('scale_v').value)]
};
queue = [];
for (var i = 0; i < 2; i ++) {
which = i ? 'background' : 'foreground';
part = data[which].replace(/^data:[^,]+,/, '');
n = 0;
while (part) {
chunk = part.substr(0, chunksize);
msg = {"requestId": requestId ++};
if (!n && (part.length > chunksize || data[which].match(/^data:/))) {
msg[which] = {
"contentType": data[which].match(/^data:([^,;]+)/)[1],
"data": chunk,
"encoding": data[which].match(/^data:[^,;]+;?([^,]*)/)[1],
"size": part.length
};
}
else msg[which] = chunk;
if (!n && !i) {
msg.offset = data.offset;
msg.scale = data.scale;
if (data.background && data.background.length < 25)
msg.background = data.background;
}
queue.push(msg);
part = part.substr(chunksize);
n += 1;
}
if (!data.background || data.background.length < 25) break;
}
processQueue();
}
function processQueue() {
var msg = queue.shift();
if (msg) {
session.sendMessage(namespace, msg, onSuccess.bind(this, msg), onError);
processQueue();
}
}
</script>
</head>
<body>
<table id="wrapper">
<tr>
<td>
<form method="get" onsubmit="send(); return false">
<h1>Chromecast Pattern Generator Test</h1>
<p>
Foreground and background can be hex strings e.g. <code>#3C0</code>, RGB e.g. <code>rgb(51, 204, 0)</code>, or image URLs (data URLs are supported).<br>
Fields other than foreground are optional.<br>
Horizontal and vertical position should be given as relative position <code>0.0..1.0</code>.<br>
Horizontal and vertical scale should be given as scaling factor <code>0.0..50.0</code>.
</p>
<table>
<tr>
<th>Foreground:</th>
<td><textarea id="foreground">#C30</textarea></td>
</tr>
<tr>
<th>Background:</th>
<td><textarea id="background">#808080</textarea></td>
</tr>
<tr>
<th>Horizontal position:</th>
<td><input id="offset_h" type="text" size="5" value="0.5"></td>
</tr>
<tr>
<th>Vertical position:</th>
<td><input id="offset_v" type="text" size="5" value="0.5"></td>
</tr>
<tr>
<th>Horizontal scale:</th>
<td><input id="scale_h" type="text" size="5" value="1"></td>
</tr>
<tr>
<th>Vertical scale:</th>
<td><input id="scale_v" type="text" size="5" value="1"></td>
</tr>
</table>
<input type="submit">
</form>
<p>
<button onclick="send(JSON.parse(this.innerText)); return false">{"foreground": "#C30", "offset": [0.5, 0.5], "scale": [1, 1]}</button><br>
<button onclick="send(JSON.parse(this.innerText)); return false">{"foreground": "#3C0", "offset": [0.5, 0.5], "scale": [1, 1]}</button><br>
<button onclick="send(JSON.parse(this.innerText)); return false">{"foreground": "#03C", "offset": [0.5, 0.5], "scale": [1, 1]}</button>
</p>
</td>
</tr>
</table>
<script>
document.getElementById("foreground").focus();
</script>
</body>
</html>