Implement basic versions of the TimelineOverview graphs.

https://bugs.webkit.org/show_bug.cgi?id=127184

Reviewed by Joseph Pecoraro.

* UserInterface/LayoutTimelineOverviewGraph.css: Added.
(.timeline-overview-graph.layout > .timeline-record-bar):
(.timeline-overview-graph.layout > .timeline-record-bar > .segment):

* UserInterface/LayoutTimelineOverviewGraph.js: Added.
(WebInspector.LayoutTimelineOverviewGraph.prototype.reset):
(WebInspector.LayoutTimelineOverviewGraph.prototype.updateLayout):
(WebInspector.LayoutTimelineOverviewGraph.prototype._layoutTimelineRecordAdded):

* UserInterface/Main.html: Added new files.

* UserInterface/NetworkTimelineOverviewGraph.css: Added.
(.timeline-overview-graph.network):
(.timeline-overview-graph.network > .graph-row):
(.timeline-overview-graph.network > .graph-row > .bar):
(.timeline-overview-graph.network > .graph-row > .bar.inactive):
(.timeline-overview-graph.network > .graph-row > .bar.unfinished):
(.timeline-overview-graph.network > .graph-row > .bar:not(.inactive)):
(.timeline-overview-graph.network:nth-child(even) > .graph-row > .bar:not(.inactive)):

* UserInterface/NetworkTimelineOverviewGraph.js: Added.
(WebInspector.NetworkTimelineOverviewGraph.prototype.reset):
(WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout.updateElementPosition):
(WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout.createBar):
(WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout):
(WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded.compareByStartTime):
(WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded.insertObjectIntoSortedArray):
(WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded):

* UserInterface/ScriptTimelineOverviewGraph.css: Added.
(.timeline-overview-graph.script > .timeline-record-bar):
(.timeline-overview-graph.script > .timeline-record-bar > .segment):

* UserInterface/ScriptTimelineOverviewGraph.js: Added.
(WebInspector.ScriptTimelineOverviewGraph.prototype.reset):
(WebInspector.ScriptTimelineOverviewGraph.prototype.updateLayout):
(WebInspector.ScriptTimelineOverviewGraph.prototype._scriptTimelineRecordAdded):

* UserInterface/TimelineContentView.js:
(WebInspector.TimelineContentView.prototype._showTimelineView):
(WebInspector.TimelineContentView.prototype._update):
(WebInspector.TimelineContentView.prototype._recordingReset):
Create and keep the graphs informed.

* UserInterface/TimelineDataGridNode.js:
(WebInspector.TimelineDataGridNode):
(WebInspector.TimelineDataGridNode.prototype.refreshGraph):
Combine records that might overlap.

* UserInterface/TimelineOverview.css:
(.timeline-overview > .graphs-container):
(.timeline-overview > .graphs-container > .timeline-overview-graph):
(.timeline-overview > .graphs-container > .timeline-overview-graph:nth-child(even)):
(.timeline-overview > .graphs-container > .timeline-overview-graph:not(:first-child)):
Add the graph rows with alternating stripe.

* UserInterface/TimelineOverview.js:
(WebInspector.TimelineOverview):
(WebInspector.TimelineOverview.prototype.set startTime):
(WebInspector.TimelineOverview.prototype.get currentTime):
(WebInspector.TimelineOverview.prototype.set currentTime):
(WebInspector.TimelineOverview.prototype.updateLayout):
(WebInspector.TimelineOverview.prototype.updateLayoutIfNeeded):
Track currentTime in a member variable and let TimelineOverview manage the current time marker.

* UserInterface/TimelineOverviewGraph.js: Added.
(WebInspector.TimelineOverviewGraph):
(WebInspector.TimelineOverviewGraph.prototype.get zeroTime):
(WebInspector.TimelineOverviewGraph.prototype.set zeroTime):
(WebInspector.TimelineOverviewGraph.prototype.get startTime):
(WebInspector.TimelineOverviewGraph.prototype.set startTime):
(WebInspector.TimelineOverviewGraph.prototype.get endTime):
(WebInspector.TimelineOverviewGraph.prototype.set endTime):
(WebInspector.TimelineOverviewGraph.prototype.get currentTime):
(WebInspector.TimelineOverviewGraph.prototype.set currentTime):
(WebInspector.TimelineOverviewGraph.prototype.reset):
(WebInspector.TimelineOverviewGraph.prototype.updateLayout):
(WebInspector.TimelineOverviewGraph.prototype.updateLayoutIfNeeded):
(WebInspector.TimelineOverviewGraph.prototype.needsLayout):

* UserInterface/TimelineRecordBar.css:
(.timeline-record-bar > .segment):
(.timeline-record-bar.unfinished > .segment):
(.timeline-record-bar > .segment.inactive + .segment):
(.timeline-record-bar.timeline-record-type-network > .segment.inactive):

* UserInterface/TimelineRecordBar.js:
(WebInspector.TimelineRecordBar):
(WebInspector.TimelineRecordBar.recordsCannotBeCombined):
(WebInspector.TimelineRecordBar.prototype.get records):
(WebInspector.TimelineRecordBar.prototype.set records):
(WebInspector.TimelineRecordBar.prototype.refresh):
Make TimelineRecordBar support multiple records.

* UserInterface/TimelineRuler.css:
(.timeline-ruler > .markers):
(.timeline-ruler > .selection-handle):
(.timeline-ruler > .shaded-area):
Add some z-index values to stay above graph elements.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162419 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebInspectorUI/ChangeLog

+2014-01-19  Timothy Hatcher  <timothy@apple.com>
+
+        Implement basic versions of the TimelineOverview graphs.
+
+        https://bugs.webkit.org/show_bug.cgi?id=127184
+
+        Reviewed by Joseph Pecoraro.
+
+        * UserInterface/LayoutTimelineOverviewGraph.css: Added.
+        (.timeline-overview-graph.layout > .timeline-record-bar):
+        (.timeline-overview-graph.layout > .timeline-record-bar > .segment):
+
+        * UserInterface/LayoutTimelineOverviewGraph.js: Added.
+        (WebInspector.LayoutTimelineOverviewGraph.prototype.reset):
+        (WebInspector.LayoutTimelineOverviewGraph.prototype.updateLayout):
+        (WebInspector.LayoutTimelineOverviewGraph.prototype._layoutTimelineRecordAdded):
+
+        * UserInterface/Main.html: Added new files.
+
+        * UserInterface/NetworkTimelineOverviewGraph.css: Added.
+        (.timeline-overview-graph.network):
+        (.timeline-overview-graph.network > .graph-row):
+        (.timeline-overview-graph.network > .graph-row > .bar):
+        (.timeline-overview-graph.network > .graph-row > .bar.inactive):
+        (.timeline-overview-graph.network > .graph-row > .bar.unfinished):
+        (.timeline-overview-graph.network > .graph-row > .bar:not(.inactive)):
+        (.timeline-overview-graph.network:nth-child(even) > .graph-row > .bar:not(.inactive)):
+
+        * UserInterface/NetworkTimelineOverviewGraph.js: Added.
+        (WebInspector.NetworkTimelineOverviewGraph.prototype.reset):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout.updateElementPosition):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout.createBar):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype.updateLayout):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded.compareByStartTime):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded.insertObjectIntoSortedArray):
+        (WebInspector.NetworkTimelineOverviewGraph.prototype._networkTimelineRecordAdded):
+
+        * UserInterface/ScriptTimelineOverviewGraph.css: Added.
+        (.timeline-overview-graph.script > .timeline-record-bar):
+        (.timeline-overview-graph.script > .timeline-record-bar > .segment):
+
+        * UserInterface/ScriptTimelineOverviewGraph.js: Added.
+        (WebInspector.ScriptTimelineOverviewGraph.prototype.reset):
+        (WebInspector.ScriptTimelineOverviewGraph.prototype.updateLayout):
+        (WebInspector.ScriptTimelineOverviewGraph.prototype._scriptTimelineRecordAdded):
+
+        * UserInterface/TimelineContentView.js:
+        (WebInspector.TimelineContentView.prototype._showTimelineView):
+        (WebInspector.TimelineContentView.prototype._update):
+        (WebInspector.TimelineContentView.prototype._recordingReset):
+        Create and keep the graphs informed.
+
+        * UserInterface/TimelineDataGridNode.js:
+        (WebInspector.TimelineDataGridNode):
+        (WebInspector.TimelineDataGridNode.prototype.refreshGraph):
+        Combine records that might overlap.
+
+        * UserInterface/TimelineOverview.css:
+        (.timeline-overview > .graphs-container):
+        (.timeline-overview > .graphs-container > .timeline-overview-graph):
+        (.timeline-overview > .graphs-container > .timeline-overview-graph:nth-child(even)):
+        (.timeline-overview > .graphs-container > .timeline-overview-graph:not(:first-child)):
+        Add the graph rows with alternating stripe.
+
+        * UserInterface/TimelineOverview.js:
+        (WebInspector.TimelineOverview):
+        (WebInspector.TimelineOverview.prototype.set startTime):
+        (WebInspector.TimelineOverview.prototype.get currentTime):
+        (WebInspector.TimelineOverview.prototype.set currentTime):
+        (WebInspector.TimelineOverview.prototype.updateLayout):
+        (WebInspector.TimelineOverview.prototype.updateLayoutIfNeeded):
+        Track currentTime in a member variable and let TimelineOverview manage the current time marker.
+
+        * UserInterface/TimelineOverviewGraph.js: Added.
+        (WebInspector.TimelineOverviewGraph):
+        (WebInspector.TimelineOverviewGraph.prototype.get zeroTime):
+        (WebInspector.TimelineOverviewGraph.prototype.set zeroTime):
+        (WebInspector.TimelineOverviewGraph.prototype.get startTime):
+        (WebInspector.TimelineOverviewGraph.prototype.set startTime):
+        (WebInspector.TimelineOverviewGraph.prototype.get endTime):
+        (WebInspector.TimelineOverviewGraph.prototype.set endTime):
+        (WebInspector.TimelineOverviewGraph.prototype.get currentTime):
+        (WebInspector.TimelineOverviewGraph.prototype.set currentTime):
+        (WebInspector.TimelineOverviewGraph.prototype.reset):
+        (WebInspector.TimelineOverviewGraph.prototype.updateLayout):
+        (WebInspector.TimelineOverviewGraph.prototype.updateLayoutIfNeeded):
+        (WebInspector.TimelineOverviewGraph.prototype.needsLayout):
+
+        * UserInterface/TimelineRecordBar.css:
+        (.timeline-record-bar > .segment):
+        (.timeline-record-bar.unfinished > .segment):
+        (.timeline-record-bar > .segment.inactive + .segment):
+        (.timeline-record-bar.timeline-record-type-network > .segment.inactive):
+
+        * UserInterface/TimelineRecordBar.js:
+        (WebInspector.TimelineRecordBar):
+        (WebInspector.TimelineRecordBar.recordsCannotBeCombined):
+        (WebInspector.TimelineRecordBar.prototype.get records):
+        (WebInspector.TimelineRecordBar.prototype.set records):
+        (WebInspector.TimelineRecordBar.prototype.refresh):
+        Make TimelineRecordBar support multiple records.
+
+        * UserInterface/TimelineRuler.css:
+        (.timeline-ruler > .markers):
+        (.timeline-ruler > .selection-handle):
+        (.timeline-ruler > .shaded-area):
+        Add some z-index values to stay above graph elements.
+
 2014-01-16  Timothy Hatcher  <timothy@apple.com>
 
         Clean up Timelines code by using ES6 features and less global access of TimelineRecording.

Source/WebInspectorUI/UserInterface/BinarySearch.js

@@ -78,3 +78,8 @@ function insertionIndexForObjectInListSortedByFunction(anObject, aList, aFunctio
         return index;
     }
 }
+
+function insertObjectIntoSortedArray(value, array, compareFunction)
+{
+   array.splice(insertionIndexForObjectInListSortedByFunction(value, array, compareFunction), 0, value);
+}

Source/WebInspectorUI/UserInterface/LayoutTimelineOverviewGraph.css

+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+.timeline-overview-graph.layout > .timeline-record-bar {
+    margin-top: 8px;
+    height: 20px;
+}
+
+.timeline-overview-graph.layout > .timeline-record-bar > .segment {
+    border-radius: 2px;
+}

Source/WebInspectorUI/UserInterface/LayoutTimelineOverviewGraph.js

+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+WebInspector.LayoutTimelineOverviewGraph = function(recording)
+{
+    WebInspector.TimelineOverviewGraph.call(this, recording);
+
+    this.element.classList.add(WebInspector.LayoutTimelineOverviewGraph.StyleClassName);
+
+    this._layoutTimeline = recording.timelines.get(WebInspector.TimelineRecord.Type.Layout);
+    this._layoutTimeline.addEventListener(WebInspector.Timeline.Event.RecordAdded, this._layoutTimelineRecordAdded, this);
+
+    this._timelineRecordBars = [];
+
+    this.reset();
+};
+
+WebInspector.LayoutTimelineOverviewGraph.StyleClassName = "layout";
+
+WebInspector.LayoutTimelineOverviewGraph.prototype = {
+    constructor: WebInspector.LayoutTimelineOverviewGraph,
+    __proto__: WebInspector.TimelineOverviewGraph.prototype,
+
+    // Public
+
+    reset: function()
+    {
+        WebInspector.TimelineOverviewGraph.prototype.reset.call(this);
+
+        this._timelineRecordBarMap = new Map;
+
+        this.element.removeChildren();
+    },
+
+    updateLayout: function()
+    {
+        WebInspector.TimelineOverviewGraph.prototype.updateLayout.call(this);
+
+        var startTime = this.startTime;
+        var currentTime = this.currentTime;
+        var endTime = this.endTime;
+        var duration = (endTime - startTime);
+
+        var visibleWidth = this.element.offsetWidth;
+        var secondsPerPixel = duration / visibleWidth;
+        var recordBarIndex = 0;
+        var barRecords = [];
+
+        function createBar(barRecords)
+        {
+            var timelineRecordBar = this._timelineRecordBars[recordBarIndex];
+            if (!timelineRecordBar)
+                timelineRecordBar = this._timelineRecordBars[recordBarIndex] = new WebInspector.TimelineRecordBar;
+            timelineRecordBar.records = barRecords;
+            timelineRecordBar.refresh(this);
+            if (!timelineRecordBar.element.parentNode)
+                this.element.appendChild(timelineRecordBar.element);
+            ++recordBarIndex;
+        }
+
+        for (var record of this._layoutTimeline.records) {
+            // If this bar is completely before the bounds of the graph, skip this record.
+            if (record.endTime < startTime)
+                continue;
+
+            // If this record is completely after the current time or end time, break out now.
+            // Records are sorted, so all records after this will be beyond the current or end time too.
+            if (record.startTime > currentTime || record.startTime > endTime)
+                break;
+
+            // Check if the previous record is a different type or far enough away to create the bar.
+            if (barRecords.length && WebInspector.TimelineRecordBar.recordsCannotBeCombined(barRecords, record, secondsPerPixel)) {
+                createBar.call(this, barRecords);
+                barRecords = [];
+            }
+
+            barRecords.push(record);
+        }
+
+        // Create the bar for the last record if needed.
+        if (barRecords.length)
+            createBar.call(this, barRecords);
+
+        // Remove the remaining unused TimelineRecordBars.
+        for (; recordBarIndex < this._timelineRecordBars.length; ++recordBarIndex) {
+            this._timelineRecordBars[recordBarIndex].records = null;
+            this._timelineRecordBars[recordBarIndex].element.remove();
+        }
+    },
+
+    // Private
+
+    _layoutTimelineRecordAdded: function(event)
+    {
+        this.needsLayout();
+    }
+};

Source/WebInspectorUI/UserInterface/Main.html

@@ -92,6 +92,9 @@
     <link rel="stylesheet" href="TimelineDataGrid.css">
     <link rel="stylesheet" href="TimelineRecordBar.css">
     <link rel="stylesheet" href="TimelineOverview.css">
+    <link rel="stylesheet" href="NetworkTimelineOverviewGraph.css">
+    <link rel="stylesheet" href="LayoutTimelineOverviewGraph.css">
+    <link rel="stylesheet" href="ScriptTimelineOverviewGraph.css">
     <link rel="stylesheet" href="ProfileView.css">
     <link rel="stylesheet" href="JavaScriptProfileView.css">
     <link rel="stylesheet" href="CSSStyleDetailsSidebarPanel.css">
@@ -367,6 +370,10 @@
     <script src="SourceCodeTimelineTimelineDataGridNode.js"></script>
     <script src="TreeOutlineDataGridSynchronizer.js"></script>
     <script src="TimelineOverview.js"></script>
+    <script src="TimelineOverviewGraph.js"></script>
+    <script src="NetworkTimelineOverviewGraph.js"></script>
+    <script src="LayoutTimelineOverviewGraph.js"></script>
+    <script src="ScriptTimelineOverviewGraph.js"></script>
     <script src="ProfileManager.js"></script>
     <script src="ProfileType.js"></script>
     <script src="ProfileView.js"></script>

Source/WebInspectorUI/UserInterface/NetworkTimelineOverviewGraph.css

+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+.timeline-overview-graph.network {
+    padding-top: 2px
+}
+
+.timeline-overview-graph.network > .graph-row {
+    position: relative;
+    height: 5px;
+}
+
+.timeline-overview-graph.network > .graph-row > .bar {
+    position: absolute;
+    height: 4px;
+    background-color: rgb(120, 176, 225);
+    border: 1px solid rgb(61, 147, 200);
+    border-radius: 2px;
+    margin-top: 1px;
+    min-width: 3px;
+}
+
+.timeline-overview-graph.network > .graph-row > .bar.inactive {
+    background-color: rgb(167, 204, 237);
+    border-color: rgb(127, 185, 220);
+}
+
+.timeline-overview-graph.network > .graph-row > .bar.inactive,
+.timeline-overview-graph.network > .graph-row > .bar.unfinished {
+    border-top-right-radius: 0;
+    border-bottom-right-radius: 0;
+    border-right: none;
+}
+
+.timeline-overview-graph.network > .graph-row > .bar:not(.inactive) {
+    border-top-left-radius: 0;
+    border-bottom-left-radius: 0;
+    z-index: 1;
+    box-shadow: white 1px 0 0;
+}
+
+.timeline-overview-graph.network:nth-child(even) > .graph-row > .bar:not(.inactive) {
+    box-shadow: rgb(247, 247, 247) 1px 0 0;
+}

Source/WebInspectorUI/UserInterface/ScriptTimelineOverviewGraph.css

+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+.timeline-overview-graph.script > .timeline-record-bar {
+    margin-top: 8px;
+    height: 20px;
+}
+
+.timeline-overview-graph.script > .timeline-record-bar > .segment {
+    border-radius: 2px;
+}

Source/WebInspectorUI/UserInterface/ScriptTimelineOverviewGraph.js

+/*
+ * Copyright (C) 2014 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+WebInspector.ScriptTimelineOverviewGraph = function(recording)
+{
+    WebInspector.TimelineOverviewGraph.call(this, recording);
+
+    this.element.classList.add(WebInspector.ScriptTimelineOverviewGraph.StyleClassName);
+
+    this._scriptTimeline = recording.timelines.get(WebInspector.TimelineRecord.Type.Script);
+    this._scriptTimeline.addEventListener(WebInspector.Timeline.Event.RecordAdded, this._scriptTimelineRecordAdded, this);
+
+    this._timelineRecordBars = [];
+
+    this.reset();
+};
+
+WebInspector.ScriptTimelineOverviewGraph.StyleClassName = "script";
+
+WebInspector.ScriptTimelineOverviewGraph.prototype = {
+    constructor: WebInspector.ScriptTimelineOverviewGraph,
+    __proto__: WebInspector.TimelineOverviewGraph.prototype,
+
+    // Public
+
+    reset: function()
+    {
+        WebInspector.TimelineOverviewGraph.prototype.reset.call(this);
+
+        this._timelineRecordBarMap = new Map;
+
+        this.element.removeChildren();
+    },
+
+    updateLayout: function()
+    {
+        WebInspector.TimelineOverviewGraph.prototype.updateLayout.call(this);
+
+        var startTime = this.startTime;
+        var currentTime = this.currentTime;
+        var endTime = this.endTime;
+        var duration = (endTime - startTime);
+
+        var visibleWidth = this.element.offsetWidth;
+        var secondsPerPixel = duration / visibleWidth;
+        var recordBarIndex = 0;
+        var barRecords = [];
+
+        function createBar(barRecords)
+        {
+            var timelineRecordBar = this._timelineRecordBars[recordBarIndex];
+            if (!timelineRecordBar)
+                timelineRecordBar = this._timelineRecordBars[recordBarIndex] = new WebInspector.TimelineRecordBar;
+            timelineRecordBar.records = barRecords;
+            timelineRecordBar.refresh(this);
+            if (!timelineRecordBar.element.parentNode)
+                this.element.appendChild(timelineRecordBar.element);
+            ++recordBarIndex;
+        }
+
+        for (var record of this._scriptTimeline.records) {
+            // If this bar is completely before the bounds of the graph, skip this record.
+            if (record.endTime < startTime)
+                continue;
+
+            // If this record is completely after the current time or end time, break out now.
+            // Records are sorted, so all records after this will be beyond the current or end time too.
+            if (record.startTime > currentTime || record.startTime > endTime)
+                break;
+
+            // Check if the previous record is a different type or far enough away to create the bar.
+            if (barRecords.length && WebInspector.TimelineRecordBar.recordsCannotBeCombined(barRecords, record, secondsPerPixel)) {
+                createBar.call(this, barRecords);
+                barRecords = [];
+            }
+
+            barRecords.push(record);
+        }
+
+        // Create the bar for the last record if needed.
+        if (barRecords.length)
+            createBar.call(this, barRecords);
+
+        // Remove the remaining unused TimelineRecordBars.
+        for (; recordBarIndex < this._timelineRecordBars.length; ++recordBarIndex) {
+            this._timelineRecordBars[recordBarIndex].records = null;
+            this._timelineRecordBars[recordBarIndex].element.remove();
+        }
+    },
+
+    // Private
+
+    _scriptTimelineRecordAdded: function(event)
+    {
+        this.needsLayout();
+    }
+};

Source/WebInspectorUI/UserInterface/TimelineContentView.js

@@ -31,13 +31,15 @@ WebInspector.TimelineContentView = function(recording)
 
     this.element.classList.add(WebInspector.TimelineContentView.StyleClassName);
 
-    this._timelineOverview = new WebInspector.TimelineOverview;
+    this._discreteTimelineOverviewGraphMap = new Map;
+    this._discreteTimelineOverviewGraphMap.set(WebInspector.TimelineRecord.Type.Network, new WebInspector.NetworkTimelineOverviewGraph(recording));
+    this._discreteTimelineOverviewGraphMap.set(WebInspector.TimelineRecord.Type.Layout, new WebInspector.LayoutTimelineOverviewGraph(recording));
+    this._discreteTimelineOverviewGraphMap.set(WebInspector.TimelineRecord.Type.Script, new WebInspector.ScriptTimelineOverviewGraph(recording));
+
+    this._timelineOverview = new WebInspector.TimelineOverview(this._discreteTimelineOverviewGraphMap);
     this._timelineOverview.addEventListener(WebInspector.TimelineOverview.Event.TimeRangeSelectionChanged, this._timeRangeSelectionChanged, this);
     this.element.appendChild(this._timelineOverview.element);
 
-    this._currentTimeMarker = new WebInspector.TimelineMarker(0, WebInspector.TimelineMarker.Type.CurrentTime);
-    this._timelineOverview.addMarker(this._currentTimeMarker);
-
     this._viewContainer = document.createElement("div");
     this._viewContainer.classList.add(WebInspector.TimelineContentView.ViewContainerStyleClassName);
     this.element.appendChild(this._viewContainer);
@@ -159,7 +161,7 @@ WebInspector.TimelineContentView.prototype = {
 
         var startTime = this._timelineOverview.selectionStartTime;
         var endTime = this._timelineOverview.selectionStartTime + this._timelineOverview.selectionDuration;
-        var currentTime = this._currentTimeMarker.time || this._recording.startTime;
+        var currentTime = this._currentTime || this._recording.startTime;
 
         function checkTimeBounds(itemStartTime, itemEndTime)
         {
@@ -228,7 +230,7 @@ WebInspector.TimelineContentView.prototype = {
 
             this._currentTimelineView.startTime = this._timelineOverview.selectionStartTime;
             this._currentTimelineView.endTime = this._timelineOverview.selectionStartTime + this._timelineOverview.selectionDuration;
-            this._currentTimelineView.currentTime = this._currentTimeMarker.time;
+            this._currentTimelineView.currentTime = this._currentTime;
 
             this._currentTimelineView.shown();
             this._currentTimelineView.updateLayout();
@@ -240,7 +242,7 @@ WebInspector.TimelineContentView.prototype = {
     _update: function(timestamp)
     {
         var startTime = this._recording.startTime;
-        var currentTime = this._currentTimeMarker.time || startTime;
+        var currentTime = this._currentTime || startTime;
         var endTime = this._recording.endTime;
         var timespanSinceLastUpdate = (timestamp - this._lastUpdateTimestamp) / 1000 || 0;
 
@@ -261,11 +263,10 @@ WebInspector.TimelineContentView.prototype = {
 
         this._timelineOverview.endTime = Math.max(endTime, currentTime);
 
-        this._currentTimeMarker.time = currentTime;
+        this._currentTime = currentTime;
+        this._timelineOverview.currentTime = currentTime;
         this._currentTimelineView.currentTime = currentTime;
 
-        this._timelineOverview.revealMarker(this._currentTimeMarker);
-
         // Force a layout now since we are already in an animation frame and don't need to delay it until the next.
         this._timelineOverview.updateLayoutIfNeeded();
         this._currentTimelineView.updateLayoutIfNeeded();
@@ -314,11 +315,14 @@ WebInspector.TimelineContentView.prototype = {
     _recordingReset: function(event)
     {
         this._startTimeNeedsReset = true;
-        this._currentTimeMarker.time = 0;
+        this._currentTime = NaN;
 
         this._overviewTimelineView.reset();
         for (var timelineView of this._discreteTimelineViewMap.values())
             timelineView.reset();
+
+        for (var timelineOverviewGraph of this._discreteTimelineOverviewGraphMap.values())
+            timelineOverviewGraph.reset();
     },
 
     _timeRangeSelectionChanged: function(event)

Source/WebInspectorUI/UserInterface/TimelineDataGridNode.js

@@ -32,7 +32,7 @@ WebInspector.TimelineDataGridNode = function(graphOnly, graphDataSource)
 
     if (graphDataSource) {
         this._graphContainerElement = document.createElement("div");
-        this._timelineRecordBarMap = new Map;
+        this._timelineRecordBars = [];
     }
 };
 
@@ -198,20 +198,89 @@ WebInspector.TimelineDataGridNode.prototype = {
             delete this._scheduledGraphRefreshIdentifier;
         }
 
-        var records = this.records || [];
-        for (var record of records) {
-            var timelineRecordBar = this._timelineRecordBarMap.get(record);
-            if (!timelineRecordBar) {
-                timelineRecordBar = new WebInspector.TimelineRecordBar(record);
-                this._timelineRecordBarMap.set(record, timelineRecordBar);
+        var records = this.records;
+        if (!records || !records.length)
+            return;
+
+        // Fast path for single records.
+        if (records.length === 1) {
+            var record = records[0];
+            var timelineRecordBar = this._timelineRecordBars[0];
+
+            if (timelineRecordBar && timelineRecordBar.record !== record) {
+                timelineRecordBar.element.remove();
+                timelineRecordBar = null;
             }
 
+            if (!timelineRecordBar)
+                timelineRecordBar = this._timelineRecordBars[0] = new WebInspector.TimelineRecordBar(record);
+
             if (timelineRecordBar.refresh(this._graphDataSource)) {
                 if (!timelineRecordBar.element.parentNode)
                     this._graphContainerElement.appendChild(timelineRecordBar.element);
-            } else {
+            } else
                 timelineRecordBar.element.remove();
+
+            return;
+        }
+
+        // Multiple records attempt to share a bar if their time is close to prevent overlapping bars.
+        var startTime = this._graphDataSource.startTime;
+        var currentTime = this._graphDataSource.currentTime;
+        var endTime = this._graphDataSource.endTime;
+        var duration = endTime - startTime;