• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1/*
2 * Copyright (C) 2013 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.TimelineOverviewBase}
34 * @param {!WebInspector.TimelineModel} model
35 */
36WebInspector.TimelineMemoryOverview = function(model)
37{
38    WebInspector.TimelineOverviewBase.call(this, model);
39    this.element.id = "timeline-overview-memory";
40
41    this._maxHeapSizeLabel = this.element.createChild("div", "max memory-graph-label");
42    this._minHeapSizeLabel = this.element.createChild("div", "min memory-graph-label");
43}
44
45WebInspector.TimelineMemoryOverview.prototype = {
46    update: function()
47    {
48        this.resetCanvas();
49
50        var records = this._model.records;
51        if (!records.length)
52            return;
53
54        const lowerOffset = 3;
55        var maxUsedHeapSize = 0;
56        var minUsedHeapSize = 100000000000;
57        var minTime = this._model.minimumRecordTime();
58        var maxTime = this._model.maximumRecordTime();
59        WebInspector.TimelinePresentationModel.forAllRecords(records, function(r) {
60            maxUsedHeapSize = Math.max(maxUsedHeapSize, r.usedHeapSize || maxUsedHeapSize);
61            minUsedHeapSize = Math.min(minUsedHeapSize, r.usedHeapSize || minUsedHeapSize);
62        });
63        minUsedHeapSize = Math.min(minUsedHeapSize, maxUsedHeapSize);
64
65        var width = this._canvas.width;
66        var height = this._canvas.height - lowerOffset;
67        var xFactor = width / (maxTime - minTime);
68        var yFactor = height / Math.max(maxUsedHeapSize - minUsedHeapSize, 1);
69
70        var histogram = new Array(width);
71        WebInspector.TimelinePresentationModel.forAllRecords(records, function(r) {
72            if (!r.usedHeapSize)
73                return;
74            var x = Math.round((WebInspector.TimelineModel.endTimeInSeconds(r) - minTime) * xFactor);
75            var y = Math.round((r.usedHeapSize - minUsedHeapSize) * yFactor);
76            histogram[x] = Math.max(histogram[x] || 0, y);
77        });
78
79        height++; // +1 so that the border always fit into the canvas area.
80
81        var y = 0;
82        var isFirstPoint = true;
83        var ctx = this._context;
84        ctx.beginPath();
85        ctx.moveTo(0, this._canvas.height);
86        for (var x = 0; x < histogram.length; x++) {
87            if (typeof histogram[x] === "undefined")
88                continue;
89            if (isFirstPoint) {
90                isFirstPoint = false;
91                y = histogram[x];
92                ctx.lineTo(0, height - y);
93            }
94            ctx.lineTo(x, height - y);
95            y = histogram[x];
96            ctx.lineTo(x, height - y);
97        }
98        ctx.lineTo(width, height - y);
99        ctx.lineTo(width, this._canvas.height);
100        ctx.lineTo(0, this._canvas.height);
101        ctx.closePath();
102
103        ctx.lineWidth = 0.5;
104        ctx.strokeStyle = "rgba(20,0,0,0.8)";
105        ctx.stroke();
106
107        ctx.fillStyle = "rgba(214,225,254, 0.8);";
108        ctx.fill();
109
110        this._maxHeapSizeLabel.textContent = Number.bytesToString(maxUsedHeapSize);
111        this._minHeapSizeLabel.textContent = Number.bytesToString(minUsedHeapSize);
112    },
113
114    __proto__: WebInspector.TimelineOverviewBase.prototype
115}
116