Add third_party/google-input-tools: Take 2

third_party/google_input_tools/third_party/closure_library/closure/goog/events/keycodes.js

Index: third_party/google_input_tools/third_party/closure_library/closure/goog/events/keycodes.js
diff --git a/third_party/google_input_tools/third_party/closure_library/closure/goog/events/keycodes.js b/third_party/google_input_tools/third_party/closure_library/closure/goog/events/keycodes.js
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+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Constant declarations for common key codes.
+ *
+ * @author eae@google.com (Emil A Eklund)
+ * @see ../demos/keyhandler.html
+ */
+
+goog.provide('goog.events.KeyCodes');
+
+goog.require('goog.userAgent');
+
+
+/**
+ * Key codes for common characters.
+ *
+ * This list is not localized and therefore some of the key codes are not
+ * correct for non US keyboard layouts. See comments below.
+ *
+ * @enum {number}
+ */
+goog.events.KeyCodes = {
+  WIN_KEY_FF_LINUX: 0,
+  MAC_ENTER: 3,
+  BACKSPACE: 8,
+  TAB: 9,
+  NUM_CENTER: 12,  // NUMLOCK on FF/Safari Mac
+  ENTER: 13,
+  SHIFT: 16,
+  CTRL: 17,
+  ALT: 18,
+  PAUSE: 19,
+  CAPS_LOCK: 20,
+  ESC: 27,
+  SPACE: 32,
+  PAGE_UP: 33,     // also NUM_NORTH_EAST
+  PAGE_DOWN: 34,   // also NUM_SOUTH_EAST
+  END: 35,         // also NUM_SOUTH_WEST
+  HOME: 36,        // also NUM_NORTH_WEST
+  LEFT: 37,        // also NUM_WEST
+  UP: 38,          // also NUM_NORTH
+  RIGHT: 39,       // also NUM_EAST
+  DOWN: 40,        // also NUM_SOUTH
+  PRINT_SCREEN: 44,
+  INSERT: 45,      // also NUM_INSERT
+  DELETE: 46,      // also NUM_DELETE
+  ZERO: 48,
+  ONE: 49,
+  TWO: 50,
+  THREE: 51,
+  FOUR: 52,
+  FIVE: 53,
+  SIX: 54,
+  SEVEN: 55,
+  EIGHT: 56,
+  NINE: 57,
+  FF_SEMICOLON: 59, // Firefox (Gecko) fires this for semicolon instead of 186
+  FF_EQUALS: 61, // Firefox (Gecko) fires this for equals instead of 187
+  FF_DASH: 173, // Firefox (Gecko) fires this for dash instead of 189
+  QUESTION_MARK: 63, // needs localization
+  A: 65,
+  B: 66,
+  C: 67,
+  D: 68,
+  E: 69,
+  F: 70,
+  G: 71,
+  H: 72,
+  I: 73,
+  J: 74,
+  K: 75,
+  L: 76,
+  M: 77,
+  N: 78,
+  O: 79,
+  P: 80,
+  Q: 81,
+  R: 82,
+  S: 83,
+  T: 84,
+  U: 85,
+  V: 86,
+  W: 87,
+  X: 88,
+  Y: 89,
+  Z: 90,
+  META: 91, // WIN_KEY_LEFT
+  WIN_KEY_RIGHT: 92,
+  CONTEXT_MENU: 93,
+  NUM_ZERO: 96,
+  NUM_ONE: 97,
+  NUM_TWO: 98,
+  NUM_THREE: 99,
+  NUM_FOUR: 100,
+  NUM_FIVE: 101,
+  NUM_SIX: 102,
+  NUM_SEVEN: 103,
+  NUM_EIGHT: 104,
+  NUM_NINE: 105,
+  NUM_MULTIPLY: 106,
+  NUM_PLUS: 107,
+  NUM_MINUS: 109,
+  NUM_PERIOD: 110,
+  NUM_DIVISION: 111,
+  F1: 112,
+  F2: 113,
+  F3: 114,
+  F4: 115,
+  F5: 116,
+  F6: 117,
+  F7: 118,
+  F8: 119,
+  F9: 120,
+  F10: 121,
+  F11: 122,
+  F12: 123,
+  NUMLOCK: 144,
+  SCROLL_LOCK: 145,
+
+  // OS-specific media keys like volume controls and browser controls.
+  FIRST_MEDIA_KEY: 166,
+  LAST_MEDIA_KEY: 183,
+
+  SEMICOLON: 186,            // needs localization
+  DASH: 189,                 // needs localization
+  EQUALS: 187,               // needs localization
+  COMMA: 188,                // needs localization
+  PERIOD: 190,               // needs localization
+  SLASH: 191,                // needs localization
+  APOSTROPHE: 192,           // needs localization
+  TILDE: 192,                // needs localization
+  SINGLE_QUOTE: 222,         // needs localization
+  OPEN_SQUARE_BRACKET: 219,  // needs localization
+  BACKSLASH: 220,            // needs localization
+  CLOSE_SQUARE_BRACKET: 221, // needs localization
+  WIN_KEY: 224,
+  MAC_FF_META: 224, // Firefox (Gecko) fires this for the meta key instead of 91
+  MAC_WK_CMD_LEFT: 91,  // WebKit Left Command key fired, same as META
+  MAC_WK_CMD_RIGHT: 93, // WebKit Right Command key fired, different from META
+  WIN_IME: 229,
+
+  // We've seen users whose machines fire this keycode at regular one
+  // second intervals. The common thread among these users is that
+  // they're all using Dell Inspiron laptops, so we suspect that this
+  // indicates a hardware/bios problem.
+  // http://en.community.dell.com/support-forums/laptop/f/3518/p/19285957/19523128.aspx
+  PHANTOM: 255
+};
+
+
+/**
+ * Returns true if the event contains a text modifying key.
+ * @param {goog.events.BrowserEvent} e A key event.
+ * @return {boolean} Whether it's a text modifying key.
+ */
+goog.events.KeyCodes.isTextModifyingKeyEvent = function(e) {
+  if (e.altKey && !e.ctrlKey ||
+      e.metaKey ||
+      // Function keys don't generate text
+      e.keyCode >= goog.events.KeyCodes.F1 &&
+      e.keyCode <= goog.events.KeyCodes.F12) {
+    return false;
+  }
+
+  // The following keys are quite harmless, even in combination with
+  // CTRL, ALT or SHIFT.
+  switch (e.keyCode) {
+    case goog.events.KeyCodes.ALT:
+    case goog.events.KeyCodes.CAPS_LOCK:
+    case goog.events.KeyCodes.CONTEXT_MENU:
+    case goog.events.KeyCodes.CTRL:
+    case goog.events.KeyCodes.DOWN:
+    case goog.events.KeyCodes.END:
+    case goog.events.KeyCodes.ESC:
+    case goog.events.KeyCodes.HOME:
+    case goog.events.KeyCodes.INSERT:
+    case goog.events.KeyCodes.LEFT:
+    case goog.events.KeyCodes.MAC_FF_META:
+    case goog.events.KeyCodes.META:
+    case goog.events.KeyCodes.NUMLOCK:
+    case goog.events.KeyCodes.NUM_CENTER:
+    case goog.events.KeyCodes.PAGE_DOWN:
+    case goog.events.KeyCodes.PAGE_UP:
+    case goog.events.KeyCodes.PAUSE:
+    case goog.events.KeyCodes.PHANTOM:
+    case goog.events.KeyCodes.PRINT_SCREEN:
+    case goog.events.KeyCodes.RIGHT:
+    case goog.events.KeyCodes.SCROLL_LOCK:
+    case goog.events.KeyCodes.SHIFT:
+    case goog.events.KeyCodes.UP:
+    case goog.events.KeyCodes.WIN_KEY:
+    case goog.events.KeyCodes.WIN_KEY_RIGHT:
+      return false;
+    case goog.events.KeyCodes.WIN_KEY_FF_LINUX:
+      return !goog.userAgent.GECKO;
+    default:
+      return e.keyCode < goog.events.KeyCodes.FIRST_MEDIA_KEY ||
+          e.keyCode > goog.events.KeyCodes.LAST_MEDIA_KEY;
+  }
+};
+
+
+/**
+ * Returns true if the key fires a keypress event in the current browser.
+ *
+ * Accoridng to MSDN [1] IE only fires keypress events for the following keys:
+ * - Letters: A - Z (uppercase and lowercase)
+ * - Numerals: 0 - 9
+ * - Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~
+ * - System: ESC, SPACEBAR, ENTER
+ *
+ * That's not entirely correct though, for instance there's no distinction
+ * between upper and lower case letters.
+ *
+ * [1] http://msdn2.microsoft.com/en-us/library/ms536939(VS.85).aspx)
+ *
+ * Safari is similar to IE, but does not fire keypress for ESC.
+ *
+ * Additionally, IE6 does not fire keydown or keypress events for letters when
+ * the control or alt keys are held down and the shift key is not. IE7 does
+ * fire keydown in these cases, though, but not keypress.
+ *
+ * @param {number} keyCode A key code.
+ * @param {number=} opt_heldKeyCode Key code of a currently-held key.
+ * @param {boolean=} opt_shiftKey Whether the shift key is held down.
+ * @param {boolean=} opt_ctrlKey Whether the control key is held down.
+ * @param {boolean=} opt_altKey Whether the alt key is held down.
+ * @return {boolean} Whether it's a key that fires a keypress event.
+ */
+goog.events.KeyCodes.firesKeyPressEvent = function(keyCode, opt_heldKeyCode,
+    opt_shiftKey, opt_ctrlKey, opt_altKey) {
+  if (!goog.userAgent.IE &&
+      !(goog.userAgent.WEBKIT && goog.userAgent.isVersionOrHigher('525'))) {
+    return true;
+  }
+
+  if (goog.userAgent.MAC && opt_altKey) {
+    return goog.events.KeyCodes.isCharacterKey(keyCode);
+  }
+
+  // Alt but not AltGr which is represented as Alt+Ctrl.
+  if (opt_altKey && !opt_ctrlKey) {
+    return false;
+  }
+
+  // Saves Ctrl or Alt + key for IE and WebKit 525+, which won't fire keypress.
+  // Non-IE browsers and WebKit prior to 525 won't get this far so no need to
+  // check the user agent.
+  if (goog.isNumber(opt_heldKeyCode)) {
+    opt_heldKeyCode = goog.events.KeyCodes.normalizeKeyCode(opt_heldKeyCode);
+  }
+  if (!opt_shiftKey &&
+      (opt_heldKeyCode == goog.events.KeyCodes.CTRL ||
+       opt_heldKeyCode == goog.events.KeyCodes.ALT ||
+       goog.userAgent.MAC &&
+       opt_heldKeyCode == goog.events.KeyCodes.META)) {
+    return false;
+  }
+
+  // Some keys with Ctrl/Shift do not issue keypress in WEBKIT.
+  if (goog.userAgent.WEBKIT && opt_ctrlKey && opt_shiftKey) {
+    switch (keyCode) {
+      case goog.events.KeyCodes.BACKSLASH:
+      case goog.events.KeyCodes.OPEN_SQUARE_BRACKET:
+      case goog.events.KeyCodes.CLOSE_SQUARE_BRACKET:
+      case goog.events.KeyCodes.TILDE:
+      case goog.events.KeyCodes.SEMICOLON:
+      case goog.events.KeyCodes.DASH:
+      case goog.events.KeyCodes.EQUALS:
+      case goog.events.KeyCodes.COMMA:
+      case goog.events.KeyCodes.PERIOD:
+      case goog.events.KeyCodes.SLASH:
+      case goog.events.KeyCodes.APOSTROPHE:
+      case goog.events.KeyCodes.SINGLE_QUOTE:
+        return false;
+    }
+  }
+
+  // When Ctrl+<somekey> is held in IE, it only fires a keypress once, but it
+  // continues to fire keydown events as the event repeats.
+  if (goog.userAgent.IE && opt_ctrlKey && opt_heldKeyCode == keyCode) {
+    return false;
+  }
+
+  switch (keyCode) {
+    case goog.events.KeyCodes.ENTER:
+      return true;
+    case goog.events.KeyCodes.ESC:
+      return !goog.userAgent.WEBKIT;
+  }
+
+  return goog.events.KeyCodes.isCharacterKey(keyCode);
+};
+
+
+/**
+ * Returns true if the key produces a character.
+ * This does not cover characters on non-US keyboards (Russian, Hebrew, etc.).
+ *
+ * @param {number} keyCode A key code.
+ * @return {boolean} Whether it's a character key.
+ */
+goog.events.KeyCodes.isCharacterKey = function(keyCode) {
+  if (keyCode >= goog.events.KeyCodes.ZERO &&
+      keyCode <= goog.events.KeyCodes.NINE) {
+    return true;
+  }
+
+  if (keyCode >= goog.events.KeyCodes.NUM_ZERO &&
+      keyCode <= goog.events.KeyCodes.NUM_MULTIPLY) {
+    return true;
+  }
+
+  if (keyCode >= goog.events.KeyCodes.A &&
+      keyCode <= goog.events.KeyCodes.Z) {
+    return true;
+  }
+
+  // Safari sends zero key code for non-latin characters.
+  if (goog.userAgent.WEBKIT && keyCode == 0) {
+    return true;
+  }
+
+  switch (keyCode) {
+    case goog.events.KeyCodes.SPACE:
+    case goog.events.KeyCodes.QUESTION_MARK:
+    case goog.events.KeyCodes.NUM_PLUS:
+    case goog.events.KeyCodes.NUM_MINUS:
+    case goog.events.KeyCodes.NUM_PERIOD:
+    case goog.events.KeyCodes.NUM_DIVISION:
+    case goog.events.KeyCodes.SEMICOLON:
+    case goog.events.KeyCodes.FF_SEMICOLON:
+    case goog.events.KeyCodes.DASH:
+    case goog.events.KeyCodes.EQUALS:
+    case goog.events.KeyCodes.FF_EQUALS:
+    case goog.events.KeyCodes.COMMA:
+    case goog.events.KeyCodes.PERIOD:
+    case goog.events.KeyCodes.SLASH:
+    case goog.events.KeyCodes.APOSTROPHE:
+    case goog.events.KeyCodes.SINGLE_QUOTE:
+    case goog.events.KeyCodes.OPEN_SQUARE_BRACKET:
+    case goog.events.KeyCodes.BACKSLASH:
+    case goog.events.KeyCodes.CLOSE_SQUARE_BRACKET:
+      return true;
+    default:
+      return false;
+  }
+};
+
+
+/**
+ * Normalizes key codes from OS/Browser-specific value to the general one.
+ * @param {number} keyCode The native key code.
+ * @return {number} The normalized key code.
+ */
+goog.events.KeyCodes.normalizeKeyCode = function(keyCode) {
+  if (goog.userAgent.GECKO) {
+    return goog.events.KeyCodes.normalizeGeckoKeyCode(keyCode);
+  } else if (goog.userAgent.MAC && goog.userAgent.WEBKIT) {
+    return goog.events.KeyCodes.normalizeMacWebKitKeyCode(keyCode);
+  } else {
+    return keyCode;
+  }
+};
+
+
+/**
+ * Normalizes key codes from their Gecko-specific value to the general one.
+ * @param {number} keyCode The native key code.
+ * @return {number} The normalized key code.
+ */
+goog.events.KeyCodes.normalizeGeckoKeyCode = function(keyCode) {
+  switch (keyCode) {
+    case goog.events.KeyCodes.FF_EQUALS:
+      return goog.events.KeyCodes.EQUALS;
+    case goog.events.KeyCodes.FF_SEMICOLON:
+      return goog.events.KeyCodes.SEMICOLON;
+    case goog.events.KeyCodes.FF_DASH:
+      return goog.events.KeyCodes.DASH;
+    case goog.events.KeyCodes.MAC_FF_META:
+      return goog.events.KeyCodes.META;
+    case goog.events.KeyCodes.WIN_KEY_FF_LINUX:
+      return goog.events.KeyCodes.WIN_KEY;
+    default:
+      return keyCode;
+  }
+};
+
+
+/**
+ * Normalizes key codes from their Mac WebKit-specific value to the general one.
+ * @param {number} keyCode The native key code.
+ * @return {number} The normalized key code.
+ */
+goog.events.KeyCodes.normalizeMacWebKitKeyCode = function(keyCode) {
+  switch (keyCode) {
+    case goog.events.KeyCodes.MAC_WK_CMD_RIGHT:  // 93
+      return goog.events.KeyCodes.META;          // 91
+    default:
+      return keyCode;
+  }
+};