[Pinch-to-zoom] Moved scale factor into PinchViewport

Source/web/WebInputEventConversion.cpp

Index: Source/web/WebInputEventConversion.cpp
diff --git a/Source/web/WebInputEventConversion.cpp b/Source/web/WebInputEventConversion.cpp
index 2b383ced828daf5885efe876d5c7e40d91b2cdc2..1b47f4385ecd21294f73e64456a1c24e1ecb1915 100644
--- a/Source/web/WebInputEventConversion.cpp
+++ b/Source/web/WebInputEventConversion.cpp
@@ -38,6 +38,10 @@
 #include "core/events/MouseEvent.h"
 #include "core/events/TouchEvent.h"
 #include "core/events/WheelEvent.h"
+#include "core/frame/FrameHost.h"
+#include "core/frame/FrameView.h"
+#include "core/frame/PinchViewport.h"
+#include "core/page/Page.h"
 #include "core/rendering/RenderObject.h"
 #include "platform/KeyboardCodes.h"
 #include "platform/Widget.h"
@@ -72,16 +76,29 @@ static IntSize widgetInputEventsOffset(const Widget* widget)
     return rootView->inputEventsOffsetForEmulation();
 }
 
+static IntPoint pinchViewportOffset(const Widget* widget)
+{
+    // Event position needs to be adjusted by the pinch viewport's offset within the
+    // main frame before being passed into the widget's convertFromContainingWindow.
+    FrameView* rootView = toFrameView(widget->root());
+    if (!rootView)
+        return IntPoint();
+
+    return flooredIntPoint(rootView->page()->frameHost().pinchViewport().visibleRect().location());
+}
+
 // MakePlatformMouseEvent -----------------------------------------------------
 
 PlatformMouseEventBuilder::PlatformMouseEventBuilder(Widget* widget, const WebMouseEvent& e)
 {
     float scale = widgetInputEventsScaleFactor(widget);
     IntSize offset = widgetInputEventsOffset(widget);
+    IntPoint pinchViewport = pinchViewportOffset(widget);
 
     // FIXME: Widget is always toplevel, unless it's a popup. We may be able
     // to get rid of this once we abstract popups into a WebKit API.
-    m_position = widget->convertFromContainingWindow(IntPoint((e.x - offset.width()) / scale, (e.y - offset.height()) / scale));
+    m_position = widget->convertFromContainingWindow(
+        IntPoint((e.x - offset.width()) / scale + pinchViewport.x(), (e.y - offset.height()) / scale + pinchViewport.y()));
     m_globalPosition = IntPoint(e.globalX, e.globalY);
     m_movementDelta = IntPoint(e.movementX / scale, e.movementY / scale);
     m_button = static_cast<MouseButton>(e.button);
@@ -125,8 +142,10 @@ PlatformWheelEventBuilder::PlatformWheelEventBuilder(Widget* widget, const WebMo
 {
     float scale = widgetInputEventsScaleFactor(widget);
     IntSize offset = widgetInputEventsOffset(widget);
+    IntPoint pinchViewport = pinchViewportOffset(widget);
 
-    m_position = widget->convertFromContainingWindow(IntPoint((e.x - offset.width()) / scale, (e.y - offset.height()) / scale));
+    m_position = widget->convertFromContainingWindow(
+        IntPoint((e.x - offset.width()) / scale + pinchViewport.x(), (e.y - offset.height()) / scale + pinchViewport.y()));
     m_globalPosition = IntPoint(e.globalX, e.globalY);
     m_deltaX = e.deltaX;
     m_deltaY = e.deltaY;
@@ -166,6 +185,7 @@ PlatformGestureEventBuilder::PlatformGestureEventBuilder(Widget* widget, const W
 {
     float scale = widgetInputEventsScaleFactor(widget);
     IntSize offset = widgetInputEventsOffset(widget);
+    IntPoint pinchViewport = pinchViewportOffset(widget);
 
     switch (e.type) {
     case WebInputEvent::GestureScrollBegin:
@@ -243,7 +263,8 @@ PlatformGestureEventBuilder::PlatformGestureEventBuilder(Widget* widget, const W
     default:
         ASSERT_NOT_REACHED();
     }
-    m_position = widget->convertFromContainingWindow(IntPoint((e.x - offset.width()) / scale, (e.y - offset.height()) / scale));
+    m_position = widget->convertFromContainingWindow(
+        IntPoint((e.x - offset.width()) / scale + pinchViewport.x(), (e.y - offset.height()) / scale + pinchViewport.y()));
     m_globalPosition = IntPoint(e.globalX, e.globalY);
     m_timestamp = e.timeStampSeconds;
 
@@ -405,9 +426,12 @@ PlatformTouchPointBuilder::PlatformTouchPointBuilder(Widget* widget, const WebTo
 {
     float scale = widgetInputEventsScaleFactor(widget);
     IntSize offset = widgetInputEventsOffset(widget);
+    IntPoint pinchViewport = pinchViewportOffset(widget);
     m_id = point.id;
     m_state = toPlatformTouchPointState(point.state);
-    m_pos = widget->convertFromContainingWindow(IntPoint((point.position.x - offset.width()) / scale, (point.position.y - offset.height()) / scale));
+    m_pos = widget->convertFromContainingWindow(IntPoint(
+        (point.position.x - offset.width()) / scale + pinchViewport.x(),
+        (point.position.y - offset.height()) / scale + pinchViewport.y()));
     m_screenPos = IntPoint(point.screenPosition.x, point.screenPosition.y);
     m_radiusY = point.radiusY / scale;
     m_radiusX = point.radiusX / scale;