1 files changed, 104 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/Models/Instrument.js b/Source/WebInspectorUI/UserInterface/Models/Instrument.js
new file mode 100644
index 000000000..7659a0bd2
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Models/Instrument.js
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+/*
+ * Copyright (C) 2015 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.Instrument = class Instrument extends WebInspector.Object
+{
+    // Static
+
+    static createForTimelineType(type)
+    {
+        switch (type) {
+        case WebInspector.TimelineRecord.Type.Network:
+            return new WebInspector.NetworkInstrument;
+        case WebInspector.TimelineRecord.Type.Layout:
+            return new WebInspector.LayoutInstrument;
+        case WebInspector.TimelineRecord.Type.Script:
+            return new WebInspector.ScriptInstrument;
+        case WebInspector.TimelineRecord.Type.RenderingFrame:
+            return new WebInspector.FPSInstrument;
+        case WebInspector.TimelineRecord.Type.Memory:
+            return new WebInspector.MemoryInstrument;
+        case WebInspector.TimelineRecord.Type.HeapAllocations:
+            return new WebInspector.HeapAllocationsInstrument;
+        default:
+            console.error("Unknown TimelineRecord.Type: " + type);
+            return null;
+        }
+    }
+
+    static startLegacyTimelineAgent(initiatedByBackend)
+    {
+        console.assert(window.TimelineAgent, "Attempted to start legacy timeline agent without TimelineAgent.");
+
+        if (WebInspector.Instrument._legacyTimelineAgentStarted)
+            return;
+
+        WebInspector.Instrument._legacyTimelineAgentStarted = true;
+
+        if (initiatedByBackend)
+            return;
+
+        let result = TimelineAgent.start();
+
+        // COMPATIBILITY (iOS 7): recordingStarted event did not exist yet. Start explicitly.
+        if (!TimelineAgent.hasEvent("recordingStarted")) {
+            result.then(function() {
+                WebInspector.timelineManager.capturingStarted();
+            });
+        }
+    }
+
+    static stopLegacyTimelineAgent(initiatedByBackend)
+    {
+        if (!WebInspector.Instrument._legacyTimelineAgentStarted)
+            return;
+
+        WebInspector.Instrument._legacyTimelineAgentStarted = false;
+
+        if (initiatedByBackend)
+            return;
+
+        TimelineAgent.stop();
+    }
+
+    // Protected
+
+    get timelineRecordType()
+    {
+        return null; // Implemented by subclasses.
+    }
+
+    startInstrumentation(initiatedByBackend)
+    {
+        WebInspector.Instrument.startLegacyTimelineAgent(initiatedByBackend);
+    }
+
+    stopInstrumentation(initiatedByBackend)
+    {
+        WebInspector.Instrument.stopLegacyTimelineAgent(initiatedByBackend);
+    }
+};
+
+WebInspector.Instrument._legacyTimelineAgentStarted = false;