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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 /**
     32  * @constructor
     33  * @extends {WebInspector.VBox}
     34  * @param {!WebInspector.NetworkRequest} request
     35  */
     36 WebInspector.RequestTimingView = function(request)
     37 {
     38     WebInspector.VBox.call(this);
     39     this.element.classList.add("resource-timing-view");
     40 
     41     this._request = request;
     42 }
     43 
     44 WebInspector.RequestTimingView.prototype = {
     45     wasShown: function()
     46     {
     47         this._request.addEventListener(WebInspector.NetworkRequest.Events.TimingChanged, this._refresh, this);
     48         this._request.addEventListener(WebInspector.NetworkRequest.Events.FinishedLoading, this._refresh, this);
     49 
     50         if (!this._request.timing) {
     51             if (!this._emptyView) {
     52                 this._emptyView = new WebInspector.EmptyView(WebInspector.UIString("This request has no detailed timing info."));
     53                 this._emptyView.show(this.element);
     54                 this.innerView = this._emptyView;
     55             }
     56             return;
     57         }
     58 
     59         if (this._emptyView) {
     60             this._emptyView.detach();
     61             delete this._emptyView;
     62         }
     63 
     64         this._refresh();
     65     },
     66 
     67     willHide: function()
     68     {
     69         this._request.removeEventListener(WebInspector.NetworkRequest.Events.TimingChanged, this._refresh, this);
     70         this._request.removeEventListener(WebInspector.NetworkRequest.Events.FinishedLoading, this._refresh, this);
     71     },
     72 
     73     _refresh: function()
     74     {
     75         if (this._tableElement)
     76             this._tableElement.remove();
     77 
     78         this._tableElement = WebInspector.RequestTimingView.createTimingTable(this._request);
     79         this.element.appendChild(this._tableElement);
     80     },
     81 
     82     __proto__: WebInspector.VBox.prototype
     83 }
     84 
     85 
     86 /**
     87  * @param {!WebInspector.NetworkRequest} request
     88  * @return {!Element}
     89  */
     90 WebInspector.RequestTimingView.createTimingTable = function(request)
     91 {
     92     var tableElement = document.createElement("table");
     93     tableElement.className = "network-timing-table";
     94     var rows = [];
     95 
     96     function addRow(title, className, start, end)
     97     {
     98         var row = {};
     99         row.title = title;
    100         row.className = className;
    101         row.start = start;
    102         row.end = end;
    103         rows.push(row);
    104     }
    105 
    106     function firstPositive(numbers)
    107     {
    108         for (var i = 0; i < numbers.length; ++i) {
    109             if (numbers[i] > 0)
    110                 return numbers[i];
    111         }
    112         return undefined;
    113     }
    114 
    115     var timing = request.timing;
    116     var blocking = firstPositive([timing.dnsStart, timing.connectStart, timing.sendStart]);
    117     var endTime = firstPositive([request.endTime, request.responseReceivedTime, timing.requestTime]);
    118     var total = (endTime - timing.requestTime) * 1000;
    119 
    120     if (blocking > 0)
    121         addRow(WebInspector.UIString("Blocking"), "blocking", 0, blocking);
    122 
    123     if (timing.proxyStart !== -1)
    124         addRow(WebInspector.UIString("Proxy"), "proxy", timing.proxyStart, timing.proxyEnd);
    125 
    126     if (timing.dnsStart !== -1)
    127         addRow(WebInspector.UIString("DNS Lookup"), "dns", timing.dnsStart, timing.dnsEnd);
    128 
    129     if (timing.connectStart !== -1)
    130         addRow(WebInspector.UIString("Connecting"), "connecting", timing.connectStart, timing.connectEnd);
    131 
    132     if (timing.sslStart !== -1)
    133         addRow(WebInspector.UIString("SSL"), "ssl", timing.sslStart, timing.sslEnd);
    134 
    135     addRow(WebInspector.UIString("Sending"), "sending", timing.sendStart, timing.sendEnd);
    136     addRow(WebInspector.UIString("Waiting"), "waiting", timing.sendEnd, timing.receiveHeadersEnd);
    137 
    138     if (request.endTime !== -1)
    139         addRow(WebInspector.UIString("Receiving"), "receiving", (request.responseReceivedTime - timing.requestTime) * 1000, total);
    140 
    141     const chartWidth = 200;
    142     var scale = chartWidth / total;
    143 
    144     for (var i = 0; i < rows.length; ++i) {
    145         var tr = document.createElement("tr");
    146         tableElement.appendChild(tr);
    147 
    148         var td = document.createElement("td");
    149         td.textContent = rows[i].title;
    150         tr.appendChild(td);
    151 
    152         td = document.createElement("td");
    153         td.width = chartWidth + "px";
    154 
    155         var row = document.createElement("div");
    156         row.className = "network-timing-row";
    157         td.appendChild(row);
    158 
    159         var bar = document.createElement("span");
    160         bar.className = "network-timing-bar " + rows[i].className;
    161         bar.style.left = Math.floor(scale * rows[i].start) + "px";
    162         bar.style.right = Math.floor(scale * (total - rows[i].end)) + "px";
    163         bar.style.backgroundColor = rows[i].color;
    164         bar.textContent = "\u200B"; // Important for 0-time items to have 0 width.
    165         row.appendChild(bar);
    166 
    167         var title = document.createElement("span");
    168         title.className = "network-timing-bar-title";
    169         if (total - rows[i].end < rows[i].start)
    170             title.style.right = (scale * (total - rows[i].end) + 3) + "px";
    171         else
    172             title.style.left = (scale * rows[i].start + 3) + "px";
    173         title.textContent = Number.secondsToString((rows[i].end - rows[i].start) / 1000, true);
    174         row.appendChild(title);
    175 
    176         tr.appendChild(td);
    177     }
    178 
    179     if (!request.finished) {
    180         var cell = tableElement.createChild("tr").createChild("td", "caution");
    181         cell.colSpan = 2;
    182         cell.createTextChild(WebInspector.UIString("CAUTION: request is not finished yet!"));
    183     }
    184 
    185     return tableElement;
    186 }
    187