Split cocoa_event_utils in two parts.

ui/base/cocoa/cocoa_event_utils.mm

-// 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.
-
-#import "ui/base/cocoa/cocoa_event_utils.h"
-
-#include "ui/base/window_open_disposition.h"
-#include "ui/events/event_constants.h"
-
-namespace {
-
-bool isLeftButtonEvent(NSEvent* event) {
-  NSEventType type = [event type];
-  return type == NSLeftMouseDown ||
-    type == NSLeftMouseDragged ||
-    type == NSLeftMouseUp;
-}
-
-bool isRightButtonEvent(NSEvent* event) {
-  NSEventType type = [event type];
-  return type == NSRightMouseDown ||
-    type == NSRightMouseDragged ||
-    type == NSRightMouseUp;
-}
-
-bool isMiddleButtonEvent(NSEvent* event) {
-  if ([event buttonNumber] != 2)
-    return false;
-
-  NSEventType type = [event type];
-  return type == NSOtherMouseDown ||
-    type == NSOtherMouseDragged ||
-    type == NSOtherMouseUp;
-}
-
-}  // namespace
-
-namespace ui {
-
-// Retrieves a bitsum of ui::EventFlags from NSEvent.
-int EventFlagsFromNSEvent(NSEvent* event) {
-  NSUInteger modifiers = [event modifierFlags];
-  return EventFlagsFromNSEventWithModifiers(event, modifiers);
-}
-
-int EventFlagsFromModifiers(NSUInteger modifiers) {
-  int flags = 0;
-  flags |= (modifiers & NSAlphaShiftKeyMask) ? ui::EF_CAPS_LOCK_DOWN : 0;
-  flags |= (modifiers & NSShiftKeyMask) ? ui::EF_SHIFT_DOWN : 0;
-  flags |= (modifiers & NSControlKeyMask) ? ui::EF_CONTROL_DOWN : 0;
-  flags |= (modifiers & NSAlternateKeyMask) ? ui::EF_ALT_DOWN : 0;
-  flags |= (modifiers & NSCommandKeyMask) ? ui::EF_COMMAND_DOWN : 0;
-  return flags;
-}
-
-int EventFlagsFromNSEventWithModifiers(NSEvent* event, NSUInteger modifiers) {
-  int flags = EventFlagsFromModifiers(modifiers);
-  flags |= isLeftButtonEvent(event) ? ui::EF_LEFT_MOUSE_BUTTON : 0;
-  flags |= isRightButtonEvent(event) ? ui::EF_RIGHT_MOUSE_BUTTON : 0;
-  flags |= isMiddleButtonEvent(event) ? ui::EF_MIDDLE_MOUSE_BUTTON : 0;
-  return flags;
-}
-
-WindowOpenDisposition WindowOpenDispositionFromNSEvent(NSEvent* event) {
-  NSUInteger modifiers = [event modifierFlags];
-  return WindowOpenDispositionFromNSEventWithFlags(event, modifiers);
-}
-
-WindowOpenDisposition WindowOpenDispositionFromNSEventWithFlags(
-    NSEvent* event, NSUInteger modifiers) {
-  int event_flags = EventFlagsFromNSEventWithModifiers(event, modifiers);
-  return ui::DispositionFromEventFlags(event_flags);
-}
-
-}  // namespace ui