text: /*
   * Copyright (C) 2010 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   * @constructor
   * @extends {WebInspector.VBox}
   * @param {!WebInspector.NetworkRequest} request
   */
  WebInspector.RequestTimingView = function(request)
  {
      WebInspector.VBox.call(this);
      this.element.classList.add("resource-timing-view");
  
      this._request = request;
  }
  
  WebInspector.RequestTimingView.prototype = {
      wasShown: function()
      {
          this._request.addEventListener(WebInspector.NetworkRequest.Events.TimingChanged, this._refresh, this);
          this._request.addEventListener(WebInspector.NetworkRequest.Events.FinishedLoading, this._refresh, this);
  
          if (!this._request.timing) {
              if (!this._emptyView) {
                  this._emptyView = new WebInspector.EmptyView(WebInspector.UIString("This request has no detailed timing info."));
                  this._emptyView.show(this.element);
                  this.innerView = this._emptyView;
              }
              return;
          }
  
          if (this._emptyView) {
              this._emptyView.detach();
              delete this._emptyView;
          }
  
          this._refresh();
      },
  
      willHide: function()
      {
          this._request.removeEventListener(WebInspector.NetworkRequest.Events.TimingChanged, this._refresh, this);
          this._request.removeEventListener(WebInspector.NetworkRequest.Events.FinishedLoading, this._refresh, this);
      },
  
      _refresh: function()
      {
          if (this._tableElement)
              this._tableElement.remove();
  
          this._tableElement = WebInspector.RequestTimingView.createTimingTable(this._request);
          this.element.appendChild(this._tableElement);
      },
  
      __proto__: WebInspector.VBox.prototype
  }
  
  
  /**
   * @param {!WebInspector.NetworkRequest} request
   * @return {!Element}
   */
  WebInspector.RequestTimingView.createTimingTable = function(request)
  {
      var tableElement = createElementWithClass("table", "network-timing-table");
      tableElement.createChild("colgroup").createChild("col", "labels");
  
      /**
       * @param {string} title
       * @param {string} className
       * @param {number} start
       * @param {number} end
       */
      function addRow(title, className, start, end)
      {
          if ((start === -1) || (start >= end))
              return;
          var tr = tableElement.createChild("tr");
          tr.createChild("td").createTextChild(title);
          var row = tr.createChild("td").createChild("div", "network-timing-row");
  
          var bar = row.createChild("span", "network-timing-bar " + className);
          bar.style.left = (scale * start) + "%";
          bar.style.right = (scale * (total - end)) + "%";
          bar.textContent = "\u200B"; // Important for 0-time items to have 0 width.
  
          var label = row.createChild("span", "network-timing-bar-title");
          if (total - end < start)
              label.style.right = (scale * (total - end)) + "%";
          else
              label.style.left = (scale * start) + "%";
          label.textContent = Number.secondsToString((end - start) / 1000, true);
      }
  
      /**
       * @param {!Array.<number>} numbers
       * @return {number|undefined}
       */
      function firstPositive(numbers)
      {
          for (var i = 0; i < numbers.length; ++i) {
              if (numbers[i] > 0)
                  return numbers[i];
          }
          return undefined;
      }
  
      function createCommunicationTimingTable()
      {
          addRow(WebInspector.UIString("Stalled"), "blocking", 0, blocking || 0);
          addRow(WebInspector.UIString("Proxy negotiation"), "proxy", timing.proxyStart, timing.proxyEnd);
          addRow(WebInspector.UIString("DNS Lookup"), "dns", timing.dnsStart, timing.dnsEnd);
          addRow(WebInspector.UIString("Initial connection"), "connecting", timing.connectStart, timing.connectEnd);
          addRow(WebInspector.UIString("SSL"), "ssl", timing.sslStart, timing.sslEnd);
          addRow(WebInspector.UIString("Request sent"), "sending", timing.sendStart, timing.sendEnd);
          addRow(WebInspector.UIString("Waiting (TTFB)"), "waiting", timing.sendEnd, timing.receiveHeadersEnd);
      }
  
      function createServiceWorkerTimingTable()
      {
          addRow(WebInspector.UIString("Stalled"), "blocking", 0, timing.serviceWorkerFetchStart);
          addRow(WebInspector.UIString("Request to ServiceWorker"), "serviceworker", timing.serviceWorkerFetchStart, timing.serviceWorkerFetchEnd);
          addRow(WebInspector.UIString("ServiceWorker Preparation"), "serviceworker", timing.serviceWorkerFetchStart, timing.serviceWorkerFetchReady);
          addRow(WebInspector.UIString("Waiting (TTFB)"), "waiting", timing.serviceWorkerFetchEnd, timing.receiveHeadersEnd);
      }
  
      var timing = request.timing;
      var blocking = firstPositive([timing.dnsStart, timing.connectStart, timing.sendStart]);
      var endTime = firstPositive([request.endTime, request.responseReceivedTime, timing.requestTime]);
      var total = (endTime - timing.requestTime) * 1000;
      var scale = 100 / total;
  
      addRow(WebInspector.UIString("Total"), "total", 0, total);
      if (request.fetchedViaServiceWorker)
          createServiceWorkerTimingTable();
      else
          createCommunicationTimingTable();
      if (request.endTime !== -1)
          addRow(WebInspector.UIString("Content Download"), "receiving", (request.responseReceivedTime - timing.requestTime) * 1000, total);
  
      if (!request.finished) {
          var cell = tableElement.createChild("tr").createChild("td", "caution");
          cell.colSpan = 2;
          cell.createTextChild(WebInspector.UIString("CAUTION: request is not finished yet!"));
      }
  
      var note = tableElement.createChild("tr").createChild("td", "footnote");
      note.colSpan = 2;
      note.appendChild(WebInspector.createDocumentationAnchor("network#resource-network-timing", WebInspector.UIString("Explanation of resource timing")));
  
      return tableElement;
  }
  