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1/*
2 * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
3 * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
4 * Copyright (C) 2009 Google Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1.  Redistributions of source code must retain the above copyright
11 *     notice, this list of conditions and the following disclaimer.
12 * 2.  Redistributions in binary form must reproduce the above copyright
13 *     notice, this list of conditions and the following disclaimer in the
14 *     documentation and/or other materials provided with the distribution.
15 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
16 *     its contributors may be used to endorse or promote products derived
17 *     from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31WebInspector.TimelineGrid = function()
32{
33    this.element = document.createElement("div");
34
35    this._itemsGraphsElement = document.createElement("div");
36    this._itemsGraphsElement.id = "resources-graphs";
37    this.element.appendChild(this._itemsGraphsElement);
38
39    this._dividersElement = document.createElement("div");
40    this._dividersElement.id = "resources-dividers";
41    this.element.appendChild(this._dividersElement);
42
43    this._eventDividersElement = document.createElement("div");
44    this._eventDividersElement.id = "resources-event-dividers";
45    this.element.appendChild(this._eventDividersElement);
46
47    this._dividersLabelBarElement = document.createElement("div");
48    this._dividersLabelBarElement.id = "resources-dividers-label-bar";
49    this.element.appendChild(this._dividersLabelBarElement);
50}
51
52WebInspector.TimelineGrid.prototype = {
53    get itemsGraphsElement()
54    {
55        return this._itemsGraphsElement;
56    },
57
58    updateDividers: function(force, calculator, paddingLeft)
59    {
60        var dividerCount = Math.round(this._dividersElement.offsetWidth / 64);
61        var slice = calculator.boundarySpan / dividerCount;
62        if (!force && this._currentDividerSlice === slice)
63            return false;
64
65        if (typeof paddingLeft !== "number")
66            paddingLeft = 0;
67        this._currentDividerSlice = slice;
68
69        this._eventDividersElement.removeChildren();
70        // Reuse divider elements and labels.
71        var divider = this._dividersElement.firstChild;
72        var dividerLabelBar = this._dividersLabelBarElement.firstChild;
73
74        var dividersLabelBarElementClientWidth = this._dividersLabelBarElement.clientWidth;
75        var clientWidth = dividersLabelBarElementClientWidth - paddingLeft;
76        for (var i = paddingLeft ? 0 : 1; i <= dividerCount; ++i) {
77            if (!divider) {
78                divider = document.createElement("div");
79                divider.className = "resources-divider";
80                this._dividersElement.appendChild(divider);
81
82                dividerLabelBar = document.createElement("div");
83                dividerLabelBar.className = "resources-divider";
84                var label = document.createElement("div");
85                label.className = "resources-divider-label";
86                dividerLabelBar._labelElement = label;
87                dividerLabelBar.appendChild(label);
88                this._dividersLabelBarElement.appendChild(dividerLabelBar);
89                dividersLabelBarElementClientWidth = this._dividersLabelBarElement.clientWidth;
90            }
91
92            if (i === dividerCount)
93                divider.addStyleClass("last");
94            else
95                divider.removeStyleClass("last");
96
97            var left = paddingLeft + clientWidth * (i / dividerCount);
98            var percentLeft = 100 * left / dividersLabelBarElementClientWidth;
99            this._setDividerAndBarLeft(divider, dividerLabelBar, percentLeft);
100
101            if (!isNaN(slice))
102                dividerLabelBar._labelElement.textContent = calculator.formatValue(slice * i);
103            else
104                dividerLabelBar._labelElement.textContent = "";
105
106            divider = divider.nextSibling;
107            dividerLabelBar = dividerLabelBar.nextSibling;
108        }
109
110        // Remove extras.
111        while (divider) {
112            var nextDivider = divider.nextSibling;
113            this._dividersElement.removeChild(divider);
114            divider = nextDivider;
115        }
116        while (dividerLabelBar) {
117            var nextDivider = dividerLabelBar.nextSibling;
118            this._dividersLabelBarElement.removeChild(dividerLabelBar);
119            dividerLabelBar = nextDivider;
120        }
121        return true;
122    },
123
124    _setDividerAndBarLeft: function(divider, dividerLabelBar, percentLeft)
125    {
126        var percentStyleLeft = parseFloat(divider.style.left);
127        if (!isNaN(percentStyleLeft) && Math.abs(percentStyleLeft - percentLeft) < 0.1)
128            return;
129        divider.style.left = percentLeft + "%";
130        dividerLabelBar.style.left = percentLeft + "%";
131    },
132
133    addEventDivider: function(divider)
134    {
135        this._eventDividersElement.appendChild(divider);
136    },
137
138    setScrollAndDividerTop: function(scrollTop, dividersTop)
139    {
140        this._dividersElement.style.top = scrollTop + "px";
141        this._eventDividersElement.style.top = scrollTop + "px";
142        this._dividersLabelBarElement.style.top = dividersTop + "px";
143    }
144}
145