packager/debugger.html

<!doctype html>
<!--
  Copyright (c) 2015-present, Facebook, Inc.
  All rights reserved.

  This source code is licensed under the BSD-style license found in the
  LICENSE file in the root directory of this source tree. An additional grant
  of patent rights can be found in the PATENTS file in the same directory.
-->

<html>
<head>
<meta charset=utf-8>
<!-- Fake favicon, to avoid extra request to server -->
<link rel="icon" href="data:;base64,iVBORw0KGgo=">
<title>React Native Debugger</title>
<script src="/debugger-ui/static/Chart.min.js"></script>
<script src="/debugger-ui/static/react-0.13.3.min.js"></script>
<script src="/debugger-ui/static/JSXTransformer-0.13.3.js"></script>
<script type="text/jsx">
(function() {
var cpuChart, memoryChart, jsCallsChart, latestLabel;
var batchedJSCalls = [];
var numJsCalls = 0;

var canvas = document.getElementById('cpu-utilization');
var ctx = canvas.getContext('2d');

var memoryCanvas = document.getElementById('memory-utilization');
var memoryCtx = memoryCanvas.getContext('2d');

var jsCallsCanvas = document.getElementById("js-calls-graph");
var jsCallsCtx = jsCallsCanvas.getContext('2d');

var numPoints = 20;
var labels = [];
var data = [];
for (var i = 1; i < numPoints + 1; i++) {
  labels.push('');
  data.push(0);
}

var cpuStartingData = {
  labels: labels,
  datasets: [
    {
      fillColor: "rgba(113,188,120,0.2)",
      strokeColor: "rgba(113,188,120,1)",
      pointColor: "rgba(113, 188,120,1)",
      pointStrokeColor: "#fff",
      data: data
    }
  ]
};

var memoryStartingData = {
  labels: labels,
  datasets: [
    {
      label: "Resident Memory (MB)",
      fillColor: "rgba(220,220,220,0.2)",
      strokeColor: "rgba(220,220,220,1)",
      pointColor: "rgba(220,220,220,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(220,220,220,1)",
      data: data
    },
    {
      label: "Virtual Memory (MB)",
      fillColor: "rgba(151,187,205,0.2)",
      strokeColor: "rgba(151,187,205,1)",
      pointColor: "rgba(151,187,205,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(151,187,205,1)",
      data: data
    }
  ]
};


var jsCallsStartingData = {
  labels: labels,
  datasets: [
    {
      fillColor: "rgba(238,210,2,0.2)",
      strokeColor: "rgba(238,210,2,1)",
      pointColor: "rgba(238,210,2,1)",
      pointStrokeColor: "#fff",
      data: data
    }
  ]
};

latestLabel = cpuStartingData.labels[numPoints - 1];
// Reduce the animation steps for demo clarity.
cpuChart = new Chart(ctx).Line(cpuStartingData, {
  scaleOverride: true,
  scaleSteps: 10,
  scaleStepWidth: 10,
  scaleStartValue: 0,
  animation: false
});

memoryChart = new Chart(memoryCtx).Line(memoryStartingData, {
  animation: false
});

document.getElementById("memory-legend").innerHTML = memoryChart.generateLegend();

jsCallsChart = new Chart(jsCallsCtx).Bar(jsCallsStartingData, {
  animation: false
});

var JSCall = React.createClass({
  render: function() {
    return (
      <ul>
        {this.props.data.map(function (subCall) {
          return (
            <li>{subCall.method}<em>"{subCall.args[0]}"</em></li>
          )
        })}
      </ul>
    );
  }
});

var JSCallsList = React.createClass({
  render: function() {
    return (
      <ul>
        {this.props.data.map(function (batch) {
          if (!batch.arguments.length) {
            return (
              <li>
                {batch.moduleMethod}
              </li>
            )
          } else {
            return (
              <li>
                {batch.moduleMethod}
                <JSCall data={batch.arguments[0]}></JSCall>
              </li>
            )
          }
        })}
      </ul>
    );
  }
});

var jsCallsComponent = React.render(
  <JSCallsList data={[]}/>,
  document.getElementById('js-calls')
);

function countJSCalls(batch) {
  return batch.arguments.reduce(function (p, c) {
    return p + c.length;
  }, 0);
}

var sessionID = window.localStorage.getItem('sessionID');
window.localStorage.removeItem('sessionID');

window.onbeforeunload = function() {
  if (sessionID) {
    return 'If you reload this page, it is going to break the debugging session. ' +
      'You should ⌘+R in the iOS simulator to reload.';
  }
};

// Alias native implementations needed by the debugger before platform-specific
// implementations are loaded into the global namespace
var debuggerSetTimeout = window.setTimeout;
var DebuggerWebSocket = window.WebSocket;

function setStatus(status) {
  document.getElementById('status').innerHTML = status;
}

var messageHandlers = {
  // This method is a bit hacky. Catalyst asks for a new clean JS runtime.
  // The easiest way to do this is to reload this page. That also means that
  // web socket connection will be lost. To send reply back we need to remember
  // message id
  'prepareJSRuntime': function(message) {
    window.onbeforeunload = undefined;
    window.localStorage.setItem('sessionID', message.id);
    window.location.reload();
  },
  'executeApplicationScript': function(message, sendReply) {
    for (var key in message.inject) {
      window[key] = JSON.parse(message.inject[key]);
    }
    loadScript(message.url, sendReply.bind(null, null));
  },
  'executeJSCall': function(message, sendReply) {

    numJsCalls += countJSCalls(message);

    batchedJSCalls.unshift(message);
    // show the last 5 batches
    if (batchedJSCalls.length > 5) {
      batchedJSCalls.pop();
    }

    jsCallsComponent.setProps({
      data: batchedJSCalls
    });


    var returnValue = null;
    try {
      if (window && window.require) {
        var module = window.require(message.moduleName);
        returnValue = module[message.moduleMethod].apply(module, message.arguments);
      }
    } finally {
      sendReply(JSON.stringify(returnValue));
    }
  },
  'usageMetrics': function (message) {
    cpuChart.addData([message.deviceCPUUsage], '');
    // Remove the first point so we dont just add values forever
    cpuChart.removeData();

    memoryChart.addData([convertToMB(message.residentMemorySize), convertToMB(message.virtualMemorySize)], '');
    // Remove the first point so we dont just add values forever
    memoryChart.removeData();

    jsCallsChart.addData([numJsCalls], '');
    // Remove the first point so we dont just add values forever
    jsCallsChart.removeData();
    numJsCalls = 0;
  }
};

function convertToMB(val) {
  return ((val / 1024) / 1024);
}

function connectToDebuggerProxy() {
  var ws = new DebuggerWebSocket('ws://' + window.location.host + '/debugger-proxy');

  ws.onopen = function() {
    if (sessionID) {
      setStatus('Debugger session #' + sessionID + ' active');
      ws.send(JSON.stringify({replyID: parseInt(sessionID, 10)}));
    } else {
      setStatus('Waiting, press ⌘R in simulator to reload and connect');
    }
  };

  ws.onmessage = function(message) {
    var object = JSON.parse(message.data);
    var sendReply = function(result) {
      ws.send(JSON.stringify({replyID: object.id, result: result}));
    };
    var handler = messageHandlers[object.method];
    if (handler) {
      handler(object, sendReply);
    } else {
      console.warn('Unknown method: ' + object.method);
    }
  };

  ws.onclose = function() {
    setStatus('Disconnected from proxy. Attempting reconnection. Is node server running?');

    sessionID = null;
    window.localStorage.removeItem('sessionID');
    debuggerSetTimeout(connectToDebuggerProxy, 100);
  };
}

connectToDebuggerProxy();

function loadScript(src, callback) {
  var script = document.createElement('script');
  script.type = 'text/javascript';
  script.src = src;
  script.onload = callback;
  document.head.appendChild(script);
}

})();
</script>
<style type="text/css">
  .legend ul {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 14px;
    margin-top : 20px;
  }
  .legend li {
    display: inline-block;
    padding-left: 10px;
  }
  .legend span {
    display: block;
    width: 14px;
    height: 14px;
    border-radius: 7px;
    float: left;
    margin-top: 1px;
    margin-right: 7px;
  }
  .legend {
    margin-bottom: 40px;
  }
  .shortcut {
    font-family: monospace;
    color: #eee;
    background-color: #333;
    padding: 4px;
    border-radius: 4px;
    letter-spacing: 3px;
  }
  .js-calls {
    font-size: small;
  }
  .graph-column {
    width: "49%";
    display: inline-block;
  }
  .js-calls-column {
    vertical-align:top;
  }
  body {
    font-size: large;
    font-family: "Helvetica Neue", Helvetica, sans-serif;
  }
  body, html {
    height: 100%;
    width: 100%;
  }
</style>
</head>
<body>
  <p>
    React Native JS code runs inside this Chrome tab
  </p>
  <p>Press <span class="shortcut">⌘⌥J</span> to open Developer Tools. Enable <a href="http://stackoverflow.com/a/17324511/232122" target="_blank">Pause On Caught Exceptions</a> for a better debugging experience.</p>
  <div>Status: <span id="status">Loading</span></div>
  <div class="graph-column">
    <div>
      <h2>UI CPU Utilization</h2>
      <div>
        <canvas id="cpu-utilization" width="400" height="250"></canvas>
      </div>
    </div>

    <div>
      <h2>Memory Utilization</h2>
      <div>
        <canvas id="memory-utilization" width="400" height="250"></canvas>
      </div>
      <div id="memory-legend" class="legend"></div>
    </div>
  </div>
  <div class="graph-column js-calls-column">
    <h2>JS Calls</h2>
    <div>
      <canvas id="js-calls-graph" width="400" height="250"></canvas>
    </div>
    <div id="js-calls" class="js-calls">
    </div>
  </div>
</body>
</html>