Bug 1085567 - Fixup synth events within pointer lock implementation for e10s. r=billm

dom/ipc/PBrowser.ipdl

@@ -27,6 +27,7 @@ using class mozilla::gfx::Matrix from "mozilla/gfx/Matrix.h";
 using struct gfxSize from "gfxPoint.h";
 using CSSRect from "Units.h";
 using LayoutDeviceIntRect from "Units.h";
+using mozilla::LayoutDeviceIntPoint from "Units.h";
 using ScreenIntSize from "Units.h";
 using struct mozilla::layers::FrameMetrics from "FrameMetrics.h";
 using struct mozilla::layers::ScrollableLayerGuid from "FrameMetrics.h";
@@ -332,6 +333,14 @@ parent:
 
     sync IsParentWindowMainWidgetVisible() returns (bool visible);
 
+    /**
+     * Content process forward from PuppetWidget for synth mouse move
+     * events.
+     *
+     * aPoint a synth point relative to the window
+     */
+    sync SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint);
+
     /**
      * Gets the DPI of the screen corresponding to this browser.
      */

dom/ipc/TabParent.cpp

@@ -2233,6 +2233,17 @@ TabParent::RecvIsParentWindowMainWidgetVisible(bool* aIsVisible)
   return NS_SUCCEEDED(rv);
 }
 
+bool
+TabParent::RecvSynthesizeNativeMouseMove(const mozilla::LayoutDeviceIntPoint& aPoint)
+{
+  // The widget associated with the browser window
+  nsCOMPtr<nsIWidget> widget = GetWidget();
+  if (widget) {
+    widget->SynthesizeNativeMouseMove(aPoint);
+  }
+  return true;
+}
+
 bool
 TabParent::RecvGetDPI(float* aValue)
 {

dom/ipc/TabParent.h

@@ -198,6 +198,7 @@ public:
     virtual bool RecvSetBackgroundColor(const nscolor& aValue) override;
     virtual bool RecvSetStatus(const uint32_t& aType, const nsString& aStatus) override;
     virtual bool RecvIsParentWindowMainWidgetVisible(bool* aIsVisible) override;
+    virtual bool RecvSynthesizeNativeMouseMove(const mozilla::LayoutDeviceIntPoint& aPoint) override;
     virtual bool RecvShowTooltip(const uint32_t& aX, const uint32_t& aY, const nsString& aTooltip) override;
     virtual bool RecvHideTooltip() override;
     virtual bool RecvGetDPI(float* aValue) override;

widget/PuppetWidget.cpp

@@ -854,6 +854,16 @@ PuppetWidget::SetCursor(nsCursor aCursor)
   return NS_OK;
 }
 
+nsresult
+PuppetWidget::SynthesizeNativeMouseMove(mozilla::LayoutDeviceIntPoint aPoint)
+{
+  if (mTabChild &&
+      !mTabChild->SendSynthesizeNativeMouseMove(aPoint)) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
 nsresult
 PuppetWidget::Paint()
 {

widget/PuppetWidget.h

@@ -123,13 +123,18 @@ public:
   NS_IMETHOD ReparentNativeWidget(nsIWidget* aNewParent) override
   { return NS_ERROR_UNEXPECTED; }
 
-  // PuppetWidgets don't have any concept of titles. 
+  // PuppetWidgets don't have any concept of titles.
   NS_IMETHOD SetTitle(const nsAString& aTitle) override
   { return NS_ERROR_UNEXPECTED; }
-  
+
   virtual mozilla::LayoutDeviceIntPoint WidgetToScreenOffset() override
   { return LayoutDeviceIntPoint::FromUntyped(GetWindowPosition() + GetChromeDimensions()); }
 
+  // Synthesized mouse events we need to forwarded to chrome. Event
+  // state manager uses this api to position the mouse in the center
+  // of the window for pointer lock.
+  virtual nsresult SynthesizeNativeMouseMove(mozilla::LayoutDeviceIntPoint aPoint) override;
+
   void InitEvent(WidgetGUIEvent& aEvent, nsIntPoint* aPoint = nullptr);
 
   NS_IMETHOD DispatchEvent(WidgetGUIEvent* aEvent, nsEventStatus& aStatus) override;