Take GetCharacterFromKeyCode() out behind the barn.

ui/events/keycodes/keyboard_code_conversion.cc

 // Copyright (c) 2011 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/keycodes/keyboard_code_conversion.h"
 
 #include <algorithm>
 
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/keycodes/dom/dom_key.h"
 #include "ui/events/keycodes/dom_us_layout_data.h"
 
 namespace ui {
 
 namespace {
 
-// This table maps a subset of |KeyboardCode| (VKEYs) to DomKey and character.
-// Only values not otherwise handled by GetDomKeyFromKeyCode() are here.
-const struct KeyboardCodeToDomKey {
-  KeyboardCode key_code;
-  DomKey::Base plain;
-  DomKey::Base shift;
-} kKeyboardCodeToDomKey[] = {
-    {VKEY_BACK, DomKey::BACKSPACE},
-    {VKEY_TAB, DomKey::TAB},
-    {VKEY_RETURN, DomKey::ENTER},
-    {VKEY_ESCAPE, DomKey::ESCAPE},
-    {VKEY_SPACE, DomKey::Constant<' '>::Character},
-    {VKEY_MULTIPLY, DomKey::Constant<'*'>::Character},
-    {VKEY_ADD, DomKey::Constant<'+'>::Character},
-    {VKEY_SEPARATOR, DomKey::Constant<','>::Character},
-    {VKEY_SUBTRACT, DomKey::Constant<'-'>::Character},
-    {VKEY_DECIMAL, DomKey::Constant<'.'>::Character},
-    {VKEY_DIVIDE, DomKey::Constant<'/'>::Character},
-    {VKEY_OEM_1, DomKey::Constant<';'>::Character,
-     DomKey::Constant<':'>::Character},
-    {VKEY_OEM_PLUS, DomKey::Constant<'='>::Character,
-     DomKey::Constant<'+'>::Character},
-    {VKEY_OEM_COMMA, DomKey::Constant<','>::Character,
-     DomKey::Constant<'<'>::Character},
-    {VKEY_OEM_MINUS, DomKey::Constant<'-'>::Character,
-     DomKey::Constant<'_'>::Character},
-    {VKEY_OEM_PERIOD, DomKey::Constant<'.'>::Character,
-     DomKey::Constant<'>'>::Character},
-    {VKEY_OEM_2, DomKey::Constant<'/'>::Character,
-     DomKey::Constant<'?'>::Character},
-    {VKEY_OEM_3, DomKey::Constant<'`'>::Character,
-     DomKey::Constant<'~'>::Character},
-    {VKEY_OEM_4, DomKey::Constant<'['>::Character,
-     DomKey::Constant<'{'>::Character},
-    {VKEY_OEM_5, DomKey::Constant<'\\'>::Character,
-     DomKey::Constant<'|'>::Character},
-    {VKEY_OEM_6, DomKey::Constant<']'>::Character,
-     DomKey::Constant<'}'>::Character},
-    {VKEY_OEM_7, DomKey::Constant<'\''>::Character,
-     DomKey::Constant<'"'>::Character},
-    {VKEY_OEM_102, DomKey::Constant<'<'>::Character,
-     DomKey::Constant<'>'>::Character},
-    {VKEY_CLEAR, DomKey::CLEAR},
-    {VKEY_SHIFT, DomKey::SHIFT},
-    {VKEY_CONTROL, DomKey::CONTROL},
-    {VKEY_MENU, DomKey::ALT},
-    {VKEY_PAUSE, DomKey::PAUSE},
-    {VKEY_CAPITAL, DomKey::CAPS_LOCK},
-    // Windows conflates 'KanaMode' and 'HangulMode'.
-    {VKEY_KANA, DomKey::KANA_MODE},
-    {VKEY_JUNJA, DomKey::JUNJA_MODE},
-    {VKEY_FINAL, DomKey::FINAL_MODE},
-    // Windows conflates 'HanjaMode' and 'KanjiMode'.
-    {VKEY_HANJA, DomKey::HANJA_MODE},
-    {VKEY_CONVERT, DomKey::CONVERT},
-    {VKEY_NONCONVERT, DomKey::NON_CONVERT},
-    {VKEY_ACCEPT, DomKey::ACCEPT},
-    {VKEY_MODECHANGE, DomKey::MODE_CHANGE},
-    {VKEY_PRIOR, DomKey::PAGE_UP},
-    {VKEY_NEXT, DomKey::PAGE_DOWN},
-    {VKEY_END, DomKey::END},
-    {VKEY_HOME, DomKey::HOME},
-    {VKEY_LEFT, DomKey::ARROW_LEFT},
-    {VKEY_UP, DomKey::ARROW_UP},
-    {VKEY_RIGHT, DomKey::ARROW_RIGHT},
-    {VKEY_DOWN, DomKey::ARROW_DOWN},
-    {VKEY_SELECT, DomKey::SELECT},
-    {VKEY_PRINT, DomKey::PRINT},
-    {VKEY_EXECUTE, DomKey::EXECUTE},
-    {VKEY_SNAPSHOT, DomKey::PRINT_SCREEN},
-    {VKEY_INSERT, DomKey::INSERT},
-    {VKEY_DELETE, DomKey::DEL},
-    {VKEY_HELP, DomKey::HELP},
-    {VKEY_LWIN, DomKey::OS},
-    {VKEY_RWIN, DomKey::OS},
-    {VKEY_APPS, DomKey::MEDIA_APPS},
-    {VKEY_NUMLOCK, DomKey::NUM_LOCK},
-    {VKEY_SCROLL, DomKey::SCROLL_LOCK},
-    {VKEY_LSHIFT, DomKey::SHIFT},
-    {VKEY_RSHIFT, DomKey::SHIFT},
-    {VKEY_LCONTROL, DomKey::CONTROL},
-    {VKEY_RCONTROL, DomKey::CONTROL},
-    {VKEY_LMENU, DomKey::ALT},
-    {VKEY_RMENU, DomKey::ALT},
-    {VKEY_BROWSER_BACK, DomKey::BROWSER_BACK},
-    {VKEY_BROWSER_FORWARD, DomKey::BROWSER_FORWARD},
-    {VKEY_BROWSER_REFRESH, DomKey::BROWSER_REFRESH},
-    {VKEY_BROWSER_STOP, DomKey::BROWSER_STOP},
-    {VKEY_BROWSER_SEARCH, DomKey::BROWSER_SEARCH},
-    {VKEY_BROWSER_FAVORITES, DomKey::BROWSER_FAVORITES},
-    {VKEY_BROWSER_HOME, DomKey::BROWSER_HOME},
-    {VKEY_VOLUME_MUTE, DomKey::VOLUME_MUTE},
-    {VKEY_VOLUME_DOWN, DomKey::VOLUME_DOWN},
-    {VKEY_VOLUME_UP, DomKey::VOLUME_UP},
-    {VKEY_MEDIA_NEXT_TRACK, DomKey::MEDIA_TRACK_NEXT},
-    {VKEY_MEDIA_PREV_TRACK, DomKey::MEDIA_TRACK_PREVIOUS},
-    {VKEY_MEDIA_STOP, DomKey::MEDIA_STOP},
-    {VKEY_MEDIA_PLAY_PAUSE, DomKey::MEDIA_PLAY_PAUSE},
-    {VKEY_MEDIA_LAUNCH_MAIL, DomKey::LAUNCH_MAIL},
-    {VKEY_MEDIA_LAUNCH_MEDIA_SELECT, DomKey::LAUNCH_MEDIA_PLAYER},
-    {VKEY_MEDIA_LAUNCH_APP1, DomKey::LAUNCH_MY_COMPUTER},
-    {VKEY_MEDIA_LAUNCH_APP2, DomKey::LAUNCH_CALCULATOR},
-    {VKEY_OEM_8, DomKey::SUPER},  // ISO Level 5 Shift in ChromeOS
-    {VKEY_PROCESSKEY, DomKey::PROCESS},
-    {VKEY_DBE_SBCSCHAR, DomKey::HANKAKU},
-    {VKEY_DBE_DBCSCHAR, DomKey::ZENKAKU},
-    {VKEY_ATTN, DomKey::ATTN},
-    {VKEY_CRSEL, DomKey::CR_SEL},
-    {VKEY_EXSEL, DomKey::EX_SEL},
-    {VKEY_EREOF, DomKey::ERASE_EOF},
-    {VKEY_PLAY, DomKey::MEDIA_PLAY},
-    {VKEY_ZOOM, DomKey::ZOOM_TOGGLE},
-    {VKEY_OEM_CLEAR, DomKey::CLEAR},
-    {VKEY_ALTGR, DomKey::ALT_GRAPH},
-#if defined(OS_POSIX)
-    {VKEY_POWER, DomKey::POWER},
-    {VKEY_BRIGHTNESS_DOWN, DomKey::BRIGHTNESS_DOWN},
-    {VKEY_BRIGHTNESS_UP, DomKey::BRIGHTNESS_UP},
-    {VKEY_COMPOSE, DomKey::COMPOSE},
-    {VKEY_OEM_103, DomKey::MEDIA_REWIND},
-    {VKEY_OEM_104, DomKey::MEDIA_FAST_FORWARD},
-#endif
-};
-
 bool IsRightSideDomCode(DomCode code) {
   return (code == DomCode::SHIFT_RIGHT) || (code == DomCode::CONTROL_RIGHT) ||
          (code == DomCode::ALT_RIGHT) || (code == DomCode::OS_RIGHT);
 }
 
 bool IsModifierDomCode(DomCode code) {
   return (code == DomCode::CONTROL_LEFT) || (code == DomCode::CONTROL_RIGHT) ||
          (code == DomCode::SHIFT_LEFT) || (code == DomCode::SHIFT_RIGHT) ||
          (code == DomCode::ALT_LEFT) || (code == DomCode::ALT_RIGHT) ||
          (code == DomCode::OS_LEFT) || (code == DomCode::OS_RIGHT);
 }
 
 }  // anonymous namespace
 
-base::char16 GetCharacterFromKeyCode(KeyboardCode key_code, int flags) {
-  DomKey key = GetDomKeyFromKeyCode(key_code, flags);
-  if (key.IsCharacter())
-    return key.ToCharacter();
+base::char16 DomCodeToUsLayoutCharacter(DomCode dom_code, int flags) {
+  DomKey dom_key;
+  KeyboardCode key_code;
+  if (DomCodeToUsLayoutDomKey(dom_code, flags, &dom_key, &key_code) &&
+      dom_key.IsCharacter()) {
+    return dom_key.ToCharacter();
+  }
   return 0;
 }
 
-DomKey GetDomKeyFromKeyCode(KeyboardCode key_code, int flags) {
-  const bool ctrl = (flags & EF_CONTROL_DOWN) != 0;
-  const bool shift = (flags & EF_SHIFT_DOWN) != 0;
-  const bool upper = shift ^ ((flags & EF_CAPS_LOCK_DOWN) != 0);
-
-  // Control characters.
-  if (ctrl) {
-    // Following Windows behavior to map ctrl-a ~ ctrl-z to \x01 ~ \x1A.
-    if (key_code >= VKEY_A && key_code <= VKEY_Z)
-      return DomKey::FromCharacter(key_code - VKEY_A + 1);
-    // Other control characters.
-    if (shift) {
-      // The following graphics characters require the shift key to input.
-      switch (key_code) {
-        // ctrl-@ maps to \x00 (Null byte)
-        case VKEY_2:
-          return DomKey::FromCharacter(0);
-        // ctrl-^ maps to \x1E (Record separator, Information separator two)
-        case VKEY_6:
-          return DomKey::FromCharacter(0x1E);
-        // ctrl-_ maps to \x1F (Unit separator, Information separator one)
-        case VKEY_OEM_MINUS:
-          return DomKey::FromCharacter(0x1F);
-        // Returns UNIDENTIFIED for all other keys to avoid inputting
-        // unexpected chars.
-        default:
-          return DomKey::UNIDENTIFIED;
-      }
-    } else {
-      switch (key_code) {
-        // ctrl-[ maps to \x1B (Escape)
-        case VKEY_OEM_4:
-          return DomKey::ESCAPE;
-        // ctrl-\ maps to \x1C (File separator, Information separator four)
-        case VKEY_OEM_5:
-          return DomKey::FromCharacter(0x1C);
-        // ctrl-] maps to \x1D (Group separator, Information separator three)
-        case VKEY_OEM_6:
-          return DomKey::FromCharacter(0x1D);
-        // ctrl-Enter maps to \x0A (Line feed)
-        case VKEY_RETURN:
-          return DomKey::FromCharacter(0x0A);
-        // Returns UNIDENTIFIED for all other keys to avoid inputting
-        // unexpected chars.
-        default:
-          return DomKey::UNIDENTIFIED;
-      }
-    }
-  }
-
-  // ASCII alphanumeric characters.
-  if (key_code >= VKEY_A && key_code <= VKEY_Z)
-    return DomKey::FromCharacter(key_code - VKEY_A + (upper ? 'A' : 'a'));
-  if (key_code >= VKEY_0 && key_code <= VKEY_9) {
-    return DomKey::FromCharacter(shift ? ")!@#$%^&*("[key_code - VKEY_0]
-                 : '0' + key_code - VKEY_0);
-  }
-  if (key_code >= VKEY_NUMPAD0 && key_code <= VKEY_NUMPAD9)
-    return DomKey::FromCharacter(key_code - VKEY_NUMPAD0 + '0');
-
-  // Function keys.
-  if (key_code >= VKEY_F1 && key_code <= VKEY_F24)
-    return DomKey::FromCharacter(key_code - VKEY_F1 + DomKey::F1);
-
-  // Other keys.
-  for (const auto& k : kKeyboardCodeToDomKey) {
-    if (k.key_code == key_code)
-      return (shift && k.shift) ? k.shift : k.plain;
-  }
-  return DomKey::UNIDENTIFIED;
-}
-
 bool DomCodeToUsLayoutDomKey(DomCode dom_code,
                              int flags,
                              DomKey* out_dom_key,
                              KeyboardCode* out_key_code) {
   if ((flags & EF_CONTROL_DOWN) == EF_CONTROL_DOWN) {
     if (DomCodeToControlCharacter(dom_code, flags, out_dom_key, out_key_code)) {
       return true;
     }
     if (!IsModifierDomCode(dom_code)) {
       *out_dom_key = DomKey::UNIDENTIFIED;
@@ skipping 218 matching lines @@
       [](const DomCodeToKeyboardCodeEntry& a, DomCode b) {
         return static_cast<int>(a.dom_code) < static_cast<int>(b);
       });
   if ((found != end) && (found->dom_code == dom_code))
     return found->key_code;
 
   return VKEY_UNKNOWN;
 }
 
 }  // namespace ui