Add Performance object to Window and implement Performance::Now()

Author: gsingh93

src/components/script/dom/bindings/codegen/Bindings.conf

@@ -41,6 +41,8 @@ DOMInterfaces = {
 'Navigator': {},
 'Node': {},
 'NodeList': {},
+'Performance': {},
+'PerformanceTiming': {},
 'UIEvent': {},
 'ValidityState': {},
 'Window': {

src/components/script/dom/performance.rs

@@ -0,0 +1,59 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::BindingDeclarations::PerformanceBinding;
+use dom::bindings::js::{JS, JSRef, Temporary};
+use dom::bindings::utils::{Reflectable, Reflector, reflect_dom_object};
+use dom::performancetiming::{PerformanceTiming, PerformanceTimingMethods};
+use dom::window::Window;
+
+use time;
+
+pub type DOMHighResTimeStamp = f64;
+
+#[deriving(Encodable)]
+pub struct Performance {
+    pub reflector_: Reflector,
+    pub timing: JS<PerformanceTiming>,
+}
+
+impl Performance {
+    fn new_inherited(window: &JSRef<Window>) -> Performance {
+        Performance {
+            reflector_: Reflector::new(),
+            timing: PerformanceTiming::new(window).root().root_ref().unrooted(),
+        }
+    }
+
+    pub fn new(window: &JSRef<Window>) -> Temporary<Performance> {
+        let performance = Performance::new_inherited(window);
+        reflect_dom_object(~performance, window, PerformanceBinding::Wrap)
+    }
+}
+
+pub trait PerformanceMethods {
+    fn Timing(&self) -> Temporary<PerformanceTiming>;
+    fn Now(&self) -> DOMHighResTimeStamp;
+}
+
+impl<'a> PerformanceMethods for JSRef<'a, Performance> {
+    fn Timing(&self) -> Temporary<PerformanceTiming> {
+        Temporary::new(self.timing.clone())
+    }
+
+    fn Now(&self) -> DOMHighResTimeStamp {
+        let navStart = self.timing.root().NavigationStartPrecise() as f64;
+        (time::precise_time_s() - navStart) as DOMHighResTimeStamp
+    }
+}
+
+impl Reflectable for Performance {
+    fn reflector<'a>(&'a self) -> &'a Reflector {
+        &self.reflector_
+    }
+
+    fn mut_reflector<'a>(&'a mut self) -> &'a mut Reflector {
+        &mut self.reflector_
+    }
+}

src/components/script/dom/performancetiming.rs

@@ -0,0 +1,57 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::BindingDeclarations::PerformanceTimingBinding;
+use dom::bindings::js::{JSRef, Temporary};
+use dom::bindings::utils::{Reflectable, Reflector, reflect_dom_object};
+use dom::window::Window;
+
+#[deriving(Encodable)]
+pub struct PerformanceTiming {
+    pub reflector_: Reflector,
+    pub navigationStart: u64,
+    pub navigationStartPrecise: f64,
+}
+
+impl PerformanceTiming {
+    pub fn new_inherited(navStart: u64, navStartPrecise: f64)
+                         -> PerformanceTiming {
+        PerformanceTiming {
+            reflector_: Reflector::new(),
+            navigationStart: navStart,
+            navigationStartPrecise: navStartPrecise,
+        }
+    }
+
+    pub fn new(window: &JSRef<Window>) -> Temporary<PerformanceTiming> {
+        let timing = PerformanceTiming::new_inherited(window.navigationStart,
+                                                      window.navigationStartPrecise);
+        reflect_dom_object(~timing, window, PerformanceTimingBinding::Wrap)
+    }
+}
+
+pub trait PerformanceTimingMethods {
+    fn NavigationStart(&self) -> u64;
+    fn NavigationStartPrecise(&self) -> f64;
+}
+
+impl<'a> PerformanceTimingMethods for JSRef<'a, PerformanceTiming> {
+    fn NavigationStart(&self) -> u64 {
+        self.navigationStart
+    }
+
+    fn NavigationStartPrecise(&self) -> f64 {
+        self.navigationStartPrecise
+    }
+}
+
+impl Reflectable for PerformanceTiming {
+    fn reflector<'a>(&'a self) -> &'a Reflector {
+        &self.reflector_
+    }
+
+    fn mut_reflector<'a>(&'a mut self) -> &'a mut Reflector {
+        &mut self.reflector_
+    }
+}

src/components/script/dom/webidls/Performance.webidl

@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html#sec-window.performance-attribute
+ */
+
+typedef double DOMHighResTimeStamp;
+
+interface Performance {
+  readonly attribute PerformanceTiming timing;
+  /*  readonly attribute PerformanceNavigation navigation; */
+};
+
+partial interface Performance {
+  DOMHighResTimeStamp now();
+};

src/components/script/dom/webidls/PerformanceTiming.webidl

@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html#sec-navigation-timing-interface
+ */
+
+interface PerformanceTiming {
+  readonly attribute unsigned long long navigationStart;
+  /*  readonly attribute unsigned long long unloadEventStart;
+  readonly attribute unsigned long long unloadEventEnd;
+  readonly attribute unsigned long long redirectStart;
+  readonly attribute unsigned long long redirectEnd;
+  readonly attribute unsigned long long fetchStart;
+  readonly attribute unsigned long long domainLookupStart;
+  readonly attribute unsigned long long domainLookupEnd;
+  readonly attribute unsigned long long connectStart;
+  readonly attribute unsigned long long connectEnd;
+  readonly attribute unsigned long long secureConnectionStart;
+  readonly attribute unsigned long long requestStart;
+  readonly attribute unsigned long long responseStart;
+  readonly attribute unsigned long long responseEnd;
+  readonly attribute unsigned long long domLoading;
+  readonly attribute unsigned long long domInteractive;
+  readonly attribute unsigned long long domContentLoadedEventStart;
+  readonly attribute unsigned long long domContentLoadedEventEnd;
+  readonly attribute unsigned long long domComplete;
+  readonly attribute unsigned long long loadEventStart;
+  readonly attribute unsigned long long loadEventEnd; */
+};

src/components/script/dom/webidls/Window.webidl

@@ -13,7 +13,7 @@
   [Unforgeable] readonly attribute Window window;
   [Replaceable] readonly attribute Window self;
   [Unforgeable] readonly attribute Document document;
-           attribute DOMString name; 
+           attribute DOMString name;
   /* [PutForwards=href, Unforgeable] */ readonly attribute Location location;
   /* readonly attribute History history;
   [Replaceable] readonly attribute BarProp locationbar;
@@ -56,6 +56,11 @@
 
 };
 
+// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime/Overview.html
+partial interface Window {
+  [Replaceable] readonly attribute Performance performance;
+};
+
 // Not part of any spec
 partial interface Window {
   // web developer niceties

src/components/script/dom/window.rs

@@ -13,6 +13,7 @@ use dom::eventtarget::{EventTarget, WindowTypeId};
 use dom::console::Console;
 use dom::location::Location;
 use dom::navigator::Navigator;
+use dom::performance::Performance;
 
 use layout_interface::{ReflowForDisplay, DocumentDamageLevel};
 use script_task::{ExitWindowMsg, FireTimerMsg, Page, ScriptChan};
@@ -32,6 +33,8 @@ use std::hash::{Hash, sip};
 use std::io::timer::Timer;
 use std::rc::Rc;
 
+use time;
+
 use serialize::{Encoder, Encodable};
 use url::Url;
 
@@ -71,6 +74,9 @@ pub struct Window {
     pub compositor: Untraceable<~ScriptListener>,
     pub browser_context: Option<BrowserContext>,
     pub page: Rc<Page>,
+    pub performance: Option<JS<Performance>>,
+    pub navigationStart: u64,
+    pub navigationStartPrecise: f64,
 }
 
 impl Window {
@@ -131,6 +137,7 @@ pub trait WindowMethods {
     fn ClearInterval(&mut self, handle: i32);
     fn Window(&self) -> Temporary<Window>;
     fn Self(&self) -> Temporary<Window>;
+    fn Performance(&mut self) -> Temporary<Performance>;
 }
 
 impl<'a> WindowMethods for JSRef<'a, Window> {
@@ -248,6 +255,14 @@ impl<'a> WindowMethods for JSRef<'a, Window> {
     fn Self(&self) -> Temporary<Window> {
         self.Window()
     }
+
+    fn Performance(&mut self) -> Temporary<Performance> {
+        if self.performance.is_none() {
+            let performance = Performance::new(self);
+            self.performance.assign(Some(performance));
+        }
+        Temporary::new(self.performance.get_ref().clone())
+    }
 }
 
 impl Reflectable for Window {
@@ -355,6 +370,9 @@ impl Window {
             active_timers: ~HashMap::new(),
             next_timer_handle: 0,
             browser_context: None,
+            performance: None,
+            navigationStart: time::get_time().sec as u64,
+            navigationStartPrecise: time::precise_time_s(),
         };
 
         WindowBinding::Wrap(cx, win)

src/components/script/script.rs

@@ -154,6 +154,8 @@ pub mod dom {
     pub mod node;
     pub mod nodelist;
     pub mod processinginstruction;
+    pub mod performance;
+    pub mod performancetiming;
     pub mod uievent;
     pub mod text;
     pub mod validitystate;

src/test/content/test_window_performance.html

@@ -0,0 +1,28 @@
+<html>
+<head>
+  <title></title>
+  <script src="harness.js"></script>
+</head>
+<body>
+<script>
+  is_not(window.performance, undefined);
+  is_a(window.performance, Performance);
+
+  is_not(window.performance.timing, undefined);
+  is_a(window.performance.timing, PerformanceTiming);
+
+  gt(window.performance.timing.navigationStart, 0);
+
+  var last = window.performance.now();
+  gt(last, 0);
+
+  // Check that window.performance.now() is monotonically increasing
+  for (var i = 0; i < 100; i++) {
+    var next = window.performance.now();
+    gt(next, last);
+    last = next;
+  }
+  finish();
+</script>
+</body>
+</html>