From bdb4ff581677ad1cd411b55a68c87534f9a64882 Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Sun, 22 Apr 2018 04:25:34 +0200
Subject: moebius#157: The Performance Observer (improvements)

https://github.com/MoonchildProductions/moebius/pull/157
---
 dom/performance/Performance.cpp                    | 21 ------
 dom/performance/PerformanceEntry.h                 | 21 ++++++
 dom/performance/PerformanceObserver.cpp            | 14 +++-
 dom/performance/PerformanceObserverEntryList.cpp   | 15 ++++-
 dom/performance/tests/mochitest.ini                |  2 -
 dom/performance/tests/performance_observer.html    | 74 ----------------------
 .../tests/test_performance_observer.html           | 52 +++++++++++++--
 dom/performance/tests/test_worker_observer.html    | 13 ++--
 .../tests/worker_performance_observer.html         | 32 ----------
 dom/tests/mochitest/general/test_interfaces.html   |  4 +-
 dom/webidl/PerformanceObserver.webidl              |  1 +
 .../test_serviceworker_interfaces.js               |  4 +-
 dom/workers/test/test_worker_interfaces.js         |  4 +-
 13 files changed, 107 insertions(+), 150 deletions(-)
 delete mode 100644 dom/performance/tests/performance_observer.html
 delete mode 100644 dom/performance/tests/worker_performance_observer.html

diff --git a/dom/performance/Performance.cpp b/dom/performance/Performance.cpp
index 8dc239b05..497bdea27 100755
--- a/dom/performance/Performance.cpp
+++ b/dom/performance/Performance.cpp
@@ -38,27 +38,6 @@ using namespace workers;
 
 namespace {
 
-// Helper classes
-class MOZ_STACK_CLASS PerformanceEntryComparator final
-{
-public:
-  bool Equals(const PerformanceEntry* aElem1,
-              const PerformanceEntry* aElem2) const
-  {
-    MOZ_ASSERT(aElem1 && aElem2,
-               "Trying to compare null performance entries");
-    return aElem1->StartTime() == aElem2->StartTime();
-  }
-
-  bool LessThan(const PerformanceEntry* aElem1,
-                const PerformanceEntry* aElem2) const
-  {
-    MOZ_ASSERT(aElem1 && aElem2,
-               "Trying to compare null performance entries");
-    return aElem1->StartTime() < aElem2->StartTime();
-  }
-};
-
 class PrefEnabledRunnable final
   : public WorkerCheckAPIExposureOnMainThreadRunnable
 {
diff --git a/dom/performance/PerformanceEntry.h b/dom/performance/PerformanceEntry.h
index bc4f84f1c..0af9f669e 100644
--- a/dom/performance/PerformanceEntry.h
+++ b/dom/performance/PerformanceEntry.h
@@ -90,6 +90,27 @@ protected:
   nsString mEntryType;
 };
 
+// Helper classes
+class MOZ_STACK_CLASS PerformanceEntryComparator final
+{
+public:
+  bool Equals(const PerformanceEntry* aElem1,
+              const PerformanceEntry* aElem2) const
+  {
+    MOZ_ASSERT(aElem1 && aElem2,
+               "Trying to compare null performance entries");
+    return aElem1->StartTime() == aElem2->StartTime();
+  }
+
+  bool LessThan(const PerformanceEntry* aElem1,
+                const PerformanceEntry* aElem2) const
+  {
+    MOZ_ASSERT(aElem1 && aElem2,
+               "Trying to compare null performance entries");
+    return aElem1->StartTime() < aElem2->StartTime();
+  }
+};
+
 } // namespace dom
 } // namespace mozilla
 
diff --git a/dom/performance/PerformanceObserver.cpp b/dom/performance/PerformanceObserver.cpp
index 11dd30ac2..d02acfb09 100644
--- a/dom/performance/PerformanceObserver.cpp
+++ b/dom/performance/PerformanceObserver.cpp
@@ -114,12 +114,13 @@ PerformanceObserver::Notify()
   RefPtr<PerformanceObserverEntryList> list =
     new PerformanceObserverEntryList(this, mQueuedEntries);
 
+  mQueuedEntries.Clear();
+
   ErrorResult rv;
   mCallback->Call(this, *list, *this, rv);
   if (NS_WARN_IF(rv.Failed())) {
     rv.SuppressException();
   }
-  mQueuedEntries.Clear();
 }
 
 void
@@ -170,6 +171,17 @@ PerformanceObserver::Observe(const PerformanceObserverInit& aOptions,
   mEntryTypes.SwapElements(validEntryTypes);
 
   mPerformance->AddObserver(this);
+
+  if (aOptions.mBuffered) {
+    for (auto entryType : mEntryTypes) {
+      nsTArray<RefPtr<PerformanceEntry>> existingEntries;
+      mPerformance->GetEntriesByType(entryType, existingEntries);
+      if (!existingEntries.IsEmpty()) {
+        mQueuedEntries.AppendElements(existingEntries);
+      }
+    }
+  }
+
   mConnected = true;
 }
 
diff --git a/dom/performance/PerformanceObserverEntryList.cpp b/dom/performance/PerformanceObserverEntryList.cpp
index 349103f08..20e818f3d 100644
--- a/dom/performance/PerformanceObserverEntryList.cpp
+++ b/dom/performance/PerformanceObserverEntryList.cpp
@@ -66,6 +66,7 @@ PerformanceObserverEntryList::GetEntries(
 
     aRetval.AppendElement(entry);
   }
+  aRetval.Sort(PerformanceEntryComparator());
 }
 
 void
@@ -79,6 +80,7 @@ PerformanceObserverEntryList::GetEntriesByType(
       aRetval.AppendElement(entry);
     }
   }
+  aRetval.Sort(PerformanceEntryComparator());
 }
 
 void
@@ -88,9 +90,18 @@ PerformanceObserverEntryList::GetEntriesByName(
   nsTArray<RefPtr<PerformanceEntry>>& aRetval)
 {
   aRetval.Clear();
+  const bool typePassed = aEntryType.WasPassed();
   for (const RefPtr<PerformanceEntry>& entry : mEntries) {
-    if (entry->GetName().Equals(aName)) {
-      aRetval.AppendElement(entry);
+    if (!entry->GetName().Equals(aName)) {
+      continue;
     }
+
+    if (typePassed &&
+        !entry->GetEntryType().Equals(aEntryType.Value())) {
+      continue;
+    }
+
+    aRetval.AppendElement(entry);
   }
+  aRetval.Sort(PerformanceEntryComparator());
 }
diff --git a/dom/performance/tests/mochitest.ini b/dom/performance/tests/mochitest.ini
index 18f7f0e45..7005637e1 100644
--- a/dom/performance/tests/mochitest.ini
+++ b/dom/performance/tests/mochitest.ini
@@ -1,13 +1,11 @@
 [DEFAULT]
 support-files =
-  performance_observer.html
   test_performance_observer.js
   test_performance_user_timing.js
   test_worker_performance_now.js
   worker_performance_user_timing.js
   worker_performance_observer.js
   sharedworker_performance_user_timing.js
-  worker_performance_observer.html
 
 [test_performance_observer.html]
 [test_performance_user_timing.html]
diff --git a/dom/performance/tests/performance_observer.html b/dom/performance/tests/performance_observer.html
deleted file mode 100644
index b8ced9296..000000000
--- a/dom/performance/tests/performance_observer.html
+++ /dev/null
@@ -1,74 +0,0 @@
-<!--
-  Any copyright is dedicated to the Public Domain.
-  http://creativecommons.org/publicdomain/zero/1.0/
--->
-<!DOCTYPE html>
-<meta charset=utf-8>
-<html>
-<head>
-<title>Test for performance observer</title>
-<script>
-'use strict';
-[
- "promise_test", "test", "setup",
- "assert_true", "assert_equals", "assert_array_equals",
- "assert_throws", "assert_unreached"
-].forEach(func => {
-  window[func] = opener[func].bind(opener);
-});
-function done() {
-  opener.add_completion_callback(() => {
-    self.close();
-  });
-  opener.done();
-}
-
-</script>
-<script src="test_performance_observer.js"></script>
-</head>
-<body>
-<div id="log"></div>
-<script>
-function makeXHR(aUrl) {
-  var xmlhttp = new XMLHttpRequest();
-  xmlhttp.open("get", aUrl, true);
-  xmlhttp.send();
-}
-
-promise_test(t => {
-  var promise = new Promise(resolve => {
-    performance.clearResourceTimings();
-
-    var observer = new PerformanceObserver(list => resolve(list));
-    observer.observe({entryTypes: ['resource']});
-    t.add_cleanup(() => observer.disconnect());
-  });
-
-  makeXHR("test-data.json");
-
-  return promise.then(list => {
-    assert_equals(list.getEntries().length, 1);
-    assert_array_equals(list.getEntries(),
-                        performance.getEntriesByType("resource"),
-                        "Observed 'resource' entries should equal to entries obtained by getEntriesByType.");
-
-    // getEntries filtering tests
-    assert_array_equals(list.getEntries({name: "http://mochi.test:8888/tests/dom/base/test/test-data.json"}),
-                        performance.getEntriesByName("http://mochi.test:8888/tests/dom/base/test/test-data.json"),
-                        "getEntries with name filter should return correct results.");
-    assert_array_equals(list.getEntries({entryType: "resource"}),
-                        performance.getEntriesByType("resource"),
-                        "getEntries with entryType filter should return correct results.");
-    assert_array_equals(list.getEntries({initiatorType: "xmlhttprequest"}),
-                        performance.getEntriesByType("resource"),
-                        "getEntries with initiatorType filter should return correct results.");
-    assert_array_equals(list.getEntries({initiatorType: "link"}),
-                        [],
-                        "getEntries with non-existent initiatorType filter should return an empty array.");
-  });
-}, "resource-timing test");
-
-done();
-
-</script>
-</body>
diff --git a/dom/performance/tests/test_performance_observer.html b/dom/performance/tests/test_performance_observer.html
index d36878315..7df881bd4 100644
--- a/dom/performance/tests/test_performance_observer.html
+++ b/dom/performance/tests/test_performance_observer.html
@@ -3,15 +3,55 @@
   http://creativecommons.org/publicdomain/zero/1.0/
 -->
 <!DOCTYPE html>
+<html>
+<head>
 <meta charset=utf-8>
 <title>Test for performance observer</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<div id=log></div>
+</head>
+<body>
+<div id="log"></div>
+<script src="test_performance_observer.js"></script>
 <script>
-'use strict';
-SpecialPowers.pushPrefEnv({"set": [["dom.enable_performance_observer", true]]},
-                          function() {
-                            window.open("performance_observer.html");
-                          });
+function makeXHR(aUrl) {
+  var xmlhttp = new XMLHttpRequest();
+  xmlhttp.open("get", aUrl, true);
+  xmlhttp.send();
+}
+
+promise_test(t => {
+  var promise = new Promise(resolve => {
+    performance.clearResourceTimings();
+
+    var observer = new PerformanceObserver(list => resolve(list));
+    observer.observe({entryTypes: ['resource']});
+    t.add_cleanup(() => observer.disconnect());
+  });
+
+  makeXHR("test-data.json");
+
+  return promise.then(list => {
+    assert_equals(list.getEntries().length, 1);
+    assert_array_equals(list.getEntries(),
+                        performance.getEntriesByType("resource"),
+                        "Observed 'resource' entries should equal to entries obtained by getEntriesByType.");
+
+    // getEntries filtering tests
+    assert_array_equals(list.getEntries({name: "http://mochi.test:8888/tests/dom/base/test/test-data.json"}),
+                        performance.getEntriesByName("http://mochi.test:8888/tests/dom/base/test/test-data.json"),
+                        "getEntries with name filter should return correct results.");
+    assert_array_equals(list.getEntries({entryType: "resource"}),
+                        performance.getEntriesByType("resource"),
+                        "getEntries with entryType filter should return correct results.");
+    assert_array_equals(list.getEntries({initiatorType: "xmlhttprequest"}),
+                        performance.getEntriesByType("resource"),
+                        "getEntries with initiatorType filter should return correct results.");
+    assert_array_equals(list.getEntries({initiatorType: "link"}),
+                        [],
+                        "getEntries with non-existent initiatorType filter should return an empty array.");
+  });
+}, "resource-timing test");
+
 </script>
+</body>
diff --git a/dom/performance/tests/test_worker_observer.html b/dom/performance/tests/test_worker_observer.html
index b9ed0c964..9a55ef1d5 100644
--- a/dom/performance/tests/test_worker_observer.html
+++ b/dom/performance/tests/test_worker_observer.html
@@ -3,15 +3,16 @@
   http://creativecommons.org/publicdomain/zero/1.0/
 -->
 <!DOCTYPE html>
+<html>
+<head>
 <meta charset=utf-8>
 <title>Test for performance observer in worker</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<div id=log></div>
+</head>
+<body>
+<div id="log"></div>
 <script>
-'use strict';
-SpecialPowers.pushPrefEnv({"set": [["dom.enable_performance_observer", true]]},
-                          function() {
-                            window.open("worker_performance_observer.html");
-                          });
+fetch_tests_from_worker(new Worker("worker_performance_observer.js"));
 </script>
+</body>
diff --git a/dom/performance/tests/worker_performance_observer.html b/dom/performance/tests/worker_performance_observer.html
deleted file mode 100644
index 613762f52..000000000
--- a/dom/performance/tests/worker_performance_observer.html
+++ /dev/null
@@ -1,32 +0,0 @@
-<!--
-  Any copyright is dedicated to the Public Domain.
-  http://creativecommons.org/publicdomain/zero/1.0/
--->
-<!DOCTYPE html>
-<meta charset=utf-8>
-<html>
-<head>
-<title>Test for performance observer in worker</title>
-</head>
-<body>
-<div id="log"></div>
-<script>
-[
- "async_test", "test", "setup",
- "assert_true", "assert_equals", "assert_array_equals",
- "assert_throws", "fetch_tests_from_worker"
-].forEach(func => {
-  window[func] = opener[func].bind(opener);
-});
-
-function done() {
-  opener.add_completion_callback(() => {
-    self.close();
-  });
-  opener.done();
-}
-
-fetch_tests_from_worker(new Worker("worker_performance_observer.js"));
-done();
-</script>
-</body>
diff --git a/dom/tests/mochitest/general/test_interfaces.html b/dom/tests/mochitest/general/test_interfaces.html
index acbc12e07..cbd08d8d4 100644
--- a/dom/tests/mochitest/general/test_interfaces.html
+++ b/dom/tests/mochitest/general/test_interfaces.html
@@ -751,9 +751,9 @@ var interfaceNamesInGlobalScope =
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PerformanceNavigation",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    {name: "PerformanceObserver", nightly: true},
+    "PerformanceObserver",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    {name: "PerformanceObserverEntryList", nightly: true},
+    "PerformanceObserverEntryList",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PerformanceResourceTiming",
 // IMPORTANT: Do not change this list without review from a DOM peer!
diff --git a/dom/webidl/PerformanceObserver.webidl b/dom/webidl/PerformanceObserver.webidl
index a3a14cb1e..4cebecbeb 100644
--- a/dom/webidl/PerformanceObserver.webidl
+++ b/dom/webidl/PerformanceObserver.webidl
@@ -9,6 +9,7 @@
 
 dictionary PerformanceObserverInit {
   required sequence<DOMString> entryTypes;
+  boolean buffered = false;
 };
 
 callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
diff --git a/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js b/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
index 9dbfcc099..a4d498fb8 100644
--- a/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
+++ b/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
@@ -172,9 +172,9 @@ var interfaceNamesInGlobalScope =
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PerformanceMeasure",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    { name: "PerformanceObserver", nightly: true },
+    "PerformanceObserver",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    { name: "PerformanceObserverEntryList", nightly: true },
+    "PerformanceObserverEntryList",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Request",
 // IMPORTANT: Do not change this list without review from a DOM peer!
diff --git a/dom/workers/test/test_worker_interfaces.js b/dom/workers/test/test_worker_interfaces.js
index e0647682c..6fe5fcaff 100644
--- a/dom/workers/test/test_worker_interfaces.js
+++ b/dom/workers/test/test_worker_interfaces.js
@@ -163,9 +163,9 @@ var interfaceNamesInGlobalScope =
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PerformanceMeasure",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    { name: "PerformanceObserver", nightly: true },
+    "PerformanceObserver",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    { name: "PerformanceObserverEntryList", nightly: true },
+    "PerformanceObserverEntryList",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Request",
 // IMPORTANT: Do not change this list without review from a DOM peer!
-- 
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