Support multi-button press for synthetic mouse events

content/browser/renderer_host/input/synthetic_gesture_target_aura.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target_aura.h"
 
 #include <stddef.h>
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
@@ skipping 94 matching lines @@
       NOTREACHED() << "WebInputEvent::ContextMenu not supported by"
           "SyntheticGestureTargetAura";
 
     default:
       NOTREACHED();
   }
 
   return ui::ET_UNKNOWN;
 }
 
-int WebMouseEventButtonToFlags(blink::WebMouseEvent::Button button) {
-  switch (button) {
-    case blink::WebMouseEvent::Button::Left:
-      return ui::EF_LEFT_MOUSE_BUTTON;
+int WebEventModifiersToEventFlags(int modifiers) {
+  int flags = 0;
 
-    case blink::WebMouseEvent::Button::Middle:
-      return ui::EF_MIDDLE_MOUSE_BUTTON;
+  if (modifiers & blink::WebInputEvent::LeftButtonDown)
+    flags |= ui::EF_LEFT_MOUSE_BUTTON;
+  if (modifiers & blink::WebInputEvent::MiddleButtonDown)
+    flags |= ui::EF_MIDDLE_MOUSE_BUTTON;
+  if (modifiers & blink::WebInputEvent::RightButtonDown)
+    flags |= ui::EF_RIGHT_MOUSE_BUTTON;
 
-    case blink::WebMouseEvent::Button::Right:
-      return ui::EF_RIGHT_MOUSE_BUTTON;
-
-    default:
-      NOTREACHED();
-  }
-
-  return 0;
+  return flags;
 }
 
 }  // namespace
 
 void SyntheticGestureTargetAura::DispatchWebMouseEventToPlatform(
       const blink::WebMouseEvent& web_mouse,
       const ui::LatencyInfo& latency_info) {
   ui::EventType event_type = WebMouseEventTypeToEventType(web_mouse.type());
-  int flags = WebMouseEventButtonToFlags(web_mouse.button);
+  int flags = WebEventModifiersToEventFlags(web_mouse.modifiers());
   ui::MouseEvent mouse_event(event_type, gfx::Point(), gfx::Point(),
                              ui::EventTimeForNow(), flags, flags);
   gfx::PointF location(web_mouse.x * device_scale_factor_,
                        web_mouse.y * device_scale_factor_);
   mouse_event.set_location_f(location);
   mouse_event.set_root_location_f(location);
 
   aura::Window* window = GetWindow();
   mouse_event.ConvertLocationToTarget(window, window->GetRootWindow());
   ui::EventDispatchDetails details =
@@ skipping 20 matching lines @@
       ->min_distance_for_pinch_scroll_in_pixels();
 }
 
 aura::Window* SyntheticGestureTargetAura::GetWindow() const {
   aura::Window* window = render_widget_host()->GetView()->GetNativeView();
   DCHECK(window);
   return window;
 }
 
 }  // namespace content