1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/events/event_utils.h" 6 7 #include <vector> 8 9 #include "ui/events/event.h" 10 #include "ui/gfx/display.h" 11 #include "ui/gfx/screen.h" 12 13 namespace ui { 14 15 namespace { 16 int g_custom_event_types = ET_LAST; 17 } // namespace 18 EventFromNative(const base::NativeEvent & native_event)19scoped_ptr<Event> EventFromNative(const base::NativeEvent& native_event) { 20 scoped_ptr<Event> event; 21 EventType type = EventTypeFromNative(native_event); 22 switch(type) { 23 case ET_KEY_PRESSED: 24 case ET_KEY_RELEASED: 25 event.reset(new KeyEvent(native_event)); 26 break; 27 28 case ET_TRANSLATED_KEY_PRESS: 29 case ET_TRANSLATED_KEY_RELEASE: 30 // These should not be generated by native events. 31 NOTREACHED(); 32 break; 33 34 case ET_MOUSE_PRESSED: 35 case ET_MOUSE_DRAGGED: 36 case ET_MOUSE_RELEASED: 37 case ET_MOUSE_MOVED: 38 case ET_MOUSE_ENTERED: 39 case ET_MOUSE_EXITED: 40 event.reset(new MouseEvent(native_event)); 41 break; 42 43 case ET_MOUSEWHEEL: 44 event.reset(new MouseWheelEvent(native_event)); 45 break; 46 47 case ET_SCROLL_FLING_START: 48 case ET_SCROLL_FLING_CANCEL: 49 case ET_SCROLL: 50 event.reset(new ScrollEvent(native_event)); 51 break; 52 53 case ET_TOUCH_RELEASED: 54 case ET_TOUCH_PRESSED: 55 case ET_TOUCH_MOVED: 56 case ET_TOUCH_CANCELLED: 57 event.reset(new TouchEvent(native_event)); 58 break; 59 60 default: 61 break; 62 } 63 return event.Pass(); 64 } 65 66 // From third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp: GetControlCharacterForKeycode(int windows_key_code,bool shift)67base::char16 GetControlCharacterForKeycode(int windows_key_code, bool shift) { 68 if (windows_key_code >= ui::VKEY_A && 69 windows_key_code <= ui::VKEY_Z) { 70 // ctrl-A ~ ctrl-Z map to \x01 ~ \x1A 71 return windows_key_code - ui::VKEY_A + 1; 72 } 73 if (shift) { 74 // following graphics chars require shift key to input. 75 switch (windows_key_code) { 76 // ctrl-@ maps to \x00 (Null byte) 77 case ui::VKEY_2: 78 return 0; 79 // ctrl-^ maps to \x1E (Record separator, Information separator two) 80 case ui::VKEY_6: 81 return 0x1E; 82 // ctrl-_ maps to \x1F (Unit separator, Information separator one) 83 case ui::VKEY_OEM_MINUS: 84 return 0x1F; 85 // Returns 0 for all other keys to avoid inputting unexpected chars. 86 default: 87 break; 88 } 89 } else { 90 switch (windows_key_code) { 91 // ctrl-[ maps to \x1B (Escape) 92 case ui::VKEY_OEM_4: 93 return 0x1B; 94 // ctrl-\ maps to \x1C (File separator, Information separator four) 95 case ui::VKEY_OEM_5: 96 return 0x1C; 97 // ctrl-] maps to \x1D (Group separator, Information separator three) 98 case ui::VKEY_OEM_6: 99 return 0x1D; 100 // ctrl-Enter maps to \x0A (Line feed) 101 case ui::VKEY_RETURN: 102 return 0x0A; 103 // Returns 0 for all other keys to avoid inputting unexpected chars. 104 default: 105 break; 106 } 107 } 108 return 0; 109 } 110 RegisterCustomEventType()111int RegisterCustomEventType() { 112 return ++g_custom_event_types; 113 } 114 EventTimeForNow()115base::TimeDelta EventTimeForNow() { 116 return base::TimeDelta::FromInternalValue( 117 base::TimeTicks::Now().ToInternalValue()); 118 } 119 ShouldDefaultToNaturalScroll()120bool ShouldDefaultToNaturalScroll() { 121 return GetInternalDisplayTouchSupport() == 122 gfx::Display::TOUCH_SUPPORT_AVAILABLE; 123 } 124 GetInternalDisplayTouchSupport()125gfx::Display::TouchSupport GetInternalDisplayTouchSupport() { 126 gfx::Screen* screen = gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE); 127 // No screen in some unit tests. 128 if (!screen) 129 return gfx::Display::TOUCH_SUPPORT_UNKNOWN; 130 const std::vector<gfx::Display>& displays = screen->GetAllDisplays(); 131 for (std::vector<gfx::Display>::const_iterator it = displays.begin(); 132 it != displays.end(); ++it) { 133 if (it->IsInternal()) 134 return it->touch_support(); 135 } 136 return gfx::Display::TOUCH_SUPPORT_UNAVAILABLE; 137 } 138 139 } // namespace ui 140