Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/event_utils.cc

 // Copyright (c) 2012 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 "ui/events/event_utils.h"
 
 #include <vector>
 
 #include "ui/events/event.h"
 #include "ui/gfx/display.h"
+#include "ui/gfx/screen.h"
 
 namespace ui {
 
-// From third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp:
-base::char16 GetControlCharacterForKeycode(int windows_key_code, bool shift) {
-  if (windows_key_code >= ui::VKEY_A &&
-    windows_key_code <= ui::VKEY_Z) {
-    // ctrl-A ~ ctrl-Z map to \x01 ~ \x1A
-    return windows_key_code - ui::VKEY_A + 1;
+namespace {
+int g_custom_event_types = ET_LAST;
+}  // namespace
+
+scoped_ptr<Event> EventFromNative(const base::NativeEvent& native_event) {
+  scoped_ptr<Event> event;
+  EventType type = EventTypeFromNative(native_event);
+  switch(type) {
+    case ET_KEY_PRESSED:
+    case ET_KEY_RELEASED:
+      event.reset(new KeyEvent(native_event));
+      break;
+
+    case ET_MOUSE_PRESSED:
+    case ET_MOUSE_DRAGGED:
+    case ET_MOUSE_RELEASED:
+    case ET_MOUSE_MOVED:
+    case ET_MOUSE_ENTERED:
+    case ET_MOUSE_EXITED:
+      event.reset(new MouseEvent(native_event));
+      break;
+
+    case ET_MOUSEWHEEL:
+      event.reset(new MouseWheelEvent(native_event));
+      break;
+
+    case ET_SCROLL_FLING_START:
+    case ET_SCROLL_FLING_CANCEL:
+    case ET_SCROLL:
+      event.reset(new ScrollEvent(native_event));
+      break;
+
+    case ET_TOUCH_RELEASED:
+    case ET_TOUCH_PRESSED:
+    case ET_TOUCH_MOVED:
+    case ET_TOUCH_CANCELLED:
+      event.reset(new TouchEvent(native_event));
+      break;
+
+    default:
+      break;
   }
-  if (shift) {
-    // following graphics chars require shift key to input.
-    switch (windows_key_code) {
-      // ctrl-@ maps to \x00 (Null byte)
-      case ui::VKEY_2:
-        return 0;
-      // ctrl-^ maps to \x1E (Record separator, Information separator two)
-      case ui::VKEY_6:
-        return 0x1E;
-      // ctrl-_ maps to \x1F (Unit separator, Information separator one)
-      case ui::VKEY_OEM_MINUS:
-        return 0x1F;
-      // Returns 0 for all other keys to avoid inputting unexpected chars.
-      default:
-        break;
-    }
-  } else {
-    switch (windows_key_code) {
-      // ctrl-[ maps to \x1B (Escape)
-      case ui::VKEY_OEM_4:
-        return 0x1B;
-      // ctrl-\ maps to \x1C (File separator, Information separator four)
-      case ui::VKEY_OEM_5:
-        return 0x1C;
-      // ctrl-] maps to \x1D (Group separator, Information separator three)
-      case ui::VKEY_OEM_6:
-        return 0x1D;
-      // ctrl-Enter maps to \x0A (Line feed)
-      case ui::VKEY_RETURN:
-        return 0x0A;
-      // Returns 0 for all other keys to avoid inputting unexpected chars.
-      default:
-        break;
-    }
-  }
-  return 0;
+  return event.Pass();
+}
+
+int RegisterCustomEventType() {
+  return ++g_custom_event_types;
 }
 
 base::TimeDelta EventTimeForNow() {
   return base::TimeDelta::FromInternalValue(
       base::TimeTicks::Now().ToInternalValue());
 }
 
+bool ShouldDefaultToNaturalScroll() {
+  return GetInternalDisplayTouchSupport() ==
+      gfx::Display::TOUCH_SUPPORT_AVAILABLE;
+}
+
+gfx::Display::TouchSupport GetInternalDisplayTouchSupport() {
+  gfx::Screen* screen = gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
+  // No screen in some unit tests.
+  if (!screen)
+    return gfx::Display::TOUCH_SUPPORT_UNKNOWN;
+  const std::vector<gfx::Display>& displays = screen->GetAllDisplays();
+  for (std::vector<gfx::Display>::const_iterator it = displays.begin();
+       it != displays.end(); ++it) {
+    if (it->IsInternal())
+      return it->touch_support();
+  }
+  return gfx::Display::TOUCH_SUPPORT_UNAVAILABLE;
+}
+
 }  // namespace ui