Use high precision timestamp for Event.timestamp

third_party/WebKit/Source/web/WebInputEventConversion.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 #include "core/frame/VisualViewport.h"
 #include "core/layout/LayoutObject.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/Page.h"
 #include "platform/KeyboardCodes.h"
 #include "platform/Widget.h"
 #include "public/platform/Platform.h"
 
 namespace blink {
 
-static const double millisPerSecond = 1000.0;
-
 static float scaleDeltaToWindow(const Widget* widget, float delta)
 {
     float scale = 1;
     if (widget) {
         FrameView* rootView = toFrameView(widget->root());
         if (rootView)
             scale = rootView->inputEventsScaleFactor();
     }
     return delta / scale;
 }
@@ skipping 258 matching lines @@
     m_text = String(e.text);
     m_unmodifiedText = String(e.unmodifiedText);
     m_keyIdentifier = String(e.keyIdentifier);
     m_nativeVirtualKeyCode = e.nativeKeyCode;
     m_isSystemKey = e.isSystemKey;
     // TODO: BUG482880 Fix this initialization to lazy initialization.
     m_code = Platform::current()->domCodeStringFromEnum(e.domCode);
     m_key = Platform::current()->domKeyStringFromEnum(e.domKey);
 
     m_modifiers = toPlatformKeyboardEventModifiers(e.modifiers);
+    m_timestamp = e.timeStampSeconds;
     m_windowsVirtualKeyCode = e.windowsKeyCode;
 }
 
 void PlatformKeyboardEventBuilder::setKeyType(Type type)
 {
     // According to the behavior of Webkit in Windows platform,
     // we need to convert KeyDown to RawKeydown and Char events
     // See WebKit/WebKit/Win/WebView.cpp
     ASSERT(m_type == KeyDown);
     ASSERT(type == RawKeyDown || type == Char);
@@ skipping 119 matching lines @@
 
 static IntPoint convertAbsoluteLocationForLayoutObject(const LayoutPoint& location, const LayoutObject& layoutObject)
 {
     return roundedIntPoint(convertAbsoluteLocationForLayoutObjectFloat(location, layoutObject));
 }
 
 // FIXME: Change |widget| to const Widget& after RemoteFrames get
 // RemoteFrameViews.
 static void updateWebMouseEventFromCoreMouseEvent(const MouseRelatedEvent& event, const Widget* widget, const LayoutObject& layoutObject, WebMouseEvent& webEvent)
 {
-    webEvent.timeStampSeconds = event.timeStamp() / millisPerSecond;
+    webEvent.timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     webEvent.modifiers = getWebInputModifiers(event);
 
     FrameView* view = widget ? toFrameView(widget->parent()) : 0;
     // FIXME: If view == nullptr, pointInRootFrame will really be pointInRootContent.
     IntPoint pointInRootFrame = IntPoint(event.absoluteLocation().x(), event.absoluteLocation().y());
     if (view)
         pointInRootFrame = view->contentsToRootFrame(pointInRootFrame);
     webEvent.globalX = event.screenX();
     webEvent.globalY = event.screenY();
     webEvent.windowX = pointInRootFrame.x();
@@ skipping 69 matching lines @@
 
     if (event.type() == EventTypeNames::touchstart)
         type = MouseDown;
     else if (event.type() == EventTypeNames::touchmove)
         type = MouseMove;
     else if (event.type() == EventTypeNames::touchend)
         type = MouseUp;
     else
         return;
 
-    timeStampSeconds = event.timeStamp() / millisPerSecond;
+    // TODO(majidvp): Instead of using |Event::createTime| which is epoch time
+    // we should instead use |Event::platformTimeStamp| which is the actual
+    // platform monotonic time. See: crbug.com/538199
+    timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     modifiers = getWebInputModifiers(event);
 
     // The mouse event co-ordinates should be generated from the co-ordinates of the touch point.
     FrameView* view =  toFrameView(widget->parent());
     // FIXME: if view == nullptr, pointInRootFrame will really be pointInRootContent.
     IntPoint pointInRootFrame = roundedIntPoint(touch->absoluteLocation());
     if (view)
         pointInRootFrame = view->contentsToRootFrame(pointInRootFrame);
     IntPoint screenPoint = roundedIntPoint(touch->screenLocation());
     globalX = screenPoint.x();
@@ skipping 38 matching lines @@
         return; // Skip all other keyboard events.
 
     modifiers = getWebInputModifiers(event);
     if (event.location() == KeyboardEvent::DOM_KEY_LOCATION_NUMPAD)
         modifiers |= WebInputEvent::IsKeyPad;
     else if (event.location() == KeyboardEvent::DOM_KEY_LOCATION_LEFT)
         modifiers |= WebInputEvent::IsLeft;
     else if (event.location() == KeyboardEvent::DOM_KEY_LOCATION_RIGHT)
         modifiers |= WebInputEvent::IsRight;
 
-    timeStampSeconds = event.timeStamp() / millisPerSecond;
+    timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     windowsKeyCode = event.keyCode();
 
     // The platform keyevent does not exist if the event was created using
     // initKeyboardEvent.
     if (!event.keyEvent())
         return;
     nativeKeyCode = event.keyEvent()->nativeVirtualKeyCode();
     domCode = Platform::current()->domEnumFromCodeString(event.keyEvent()->code());
     domKey = Platform::current()->domKeyEnumFromString(event.keyEvent()->key());
     unsigned numberOfCharacters = std::min(event.keyEvent()->text().length(), static_cast<unsigned>(textLengthCap));
@@ skipping 72 matching lines @@
         type = TouchEnd;
     else if (event.type() == EventTypeNames::touchcancel)
         type = TouchCancel;
     else {
         ASSERT_NOT_REACHED();
         type = Undefined;
         return;
     }
 
     modifiers = getWebInputModifiers(event);
-    timeStampSeconds = event.timeStamp() / millisPerSecond;
+    timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     cancelable = event.cancelable();
     causesScrollingIfUncanceled = event.causesScrollingIfUncanceled();
 
     // Currently touches[] is empty, add stationary points as-is.
     for (unsigned i = 0; i < event.touches()->length() && i < static_cast<unsigned>(WebTouchEvent::touchesLengthCap); ++i) {
         touches[i] = toWebTouchPoint(event.touches()->item(i), layoutObject, WebTouchPoint::StateStationary);
         ++touchesLength;
     }
     // If any existing points are also in the change list, we should update
     // their state, otherwise just add the new points.
@@ skipping 22 matching lines @@
         resendingPluginId = event.resendingPluginId();
     } else if (event.type() == EventTypeNames::gestureflingstart) {
         type = GestureFlingStart;
         data.flingStart.velocityX = event.velocityX();
         data.flingStart.velocityY = event.velocityY();
     } else if (event.type() == EventTypeNames::gesturetap) {
         type = GestureTap;
         data.tap.tapCount = 1;
     }
 
-    timeStampSeconds = event.timeStamp() / millisPerSecond;
+    timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     modifiers = getWebInputModifiers(event);
 
     globalX = event.screenX();
     globalY = event.screenY();
     IntPoint localPoint = convertAbsoluteLocationForLayoutObject(event.absoluteLocation(), *layoutObject);
     x = localPoint.x();
     y = localPoint.y();
 }
 
 } // namespace blink