diff -r 000000000000 -r 6474c204b198 widget/shared/SharedWidgetUtils.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/shared/SharedWidgetUtils.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,241 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WidgetUtils.h"
+
+#include "mozilla/TextEvents.h"
+
+#include "nsIBaseWindow.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIDocShell.h"
+#include "nsIInterfaceRequestorUtils.h"
+
+namespace mozilla {
+namespace widget {
+
+//static
+already_AddRefed<nsIWidget>
+WidgetUtils::DOMWindowToWidget(nsIDOMWindow *aDOMWindow)
+{
+  nsCOMPtr<nsIWidget> widget;
+
+  nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aDOMWindow);
+  if (window) {
+    nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(window->GetDocShell()));
+
+    while (!widget && baseWin) {
+      baseWin->GetParentWidget(getter_AddRefs(widget));
+      if (!widget) {
+        nsCOMPtr<nsIDocShellTreeItem> docShellAsItem(do_QueryInterface(baseWin));
+        if (!docShellAsItem)
+          return nullptr;
+
+        nsCOMPtr<nsIDocShellTreeItem> parent;
+        docShellAsItem->GetParent(getter_AddRefs(parent));
+
+        window = do_GetInterface(parent);
+        if (!window)
+          return nullptr;
+
+        baseWin = do_QueryInterface(window->GetDocShell());
+      }
+    }
+  }
+
+  return widget.forget();
+}
+
+// static
+uint32_t
+WidgetUtils::ComputeKeyCodeFromChar(uint32_t aCharCode)
+{
+  if (aCharCode >= 'A' && aCharCode <= 'Z') {
+    return aCharCode - 'A' + NS_VK_A;
+  }
+  if (aCharCode >= 'a' && aCharCode <= 'z') {
+    return aCharCode - 'a' + NS_VK_A;
+  }
+  if (aCharCode >= '0' && aCharCode <= '9') {
+    return aCharCode - '0' + NS_VK_0;
+  }
+  switch (aCharCode) {
+    case ' ': return NS_VK_SPACE;
+    case '\t': return NS_VK_TAB;
+    case ':': return NS_VK_COLON;
+    case ';': return NS_VK_SEMICOLON;
+    case '<': return NS_VK_LESS_THAN;
+    case '=': return NS_VK_EQUALS;
+    case '>': return NS_VK_GREATER_THAN;
+    case '?': return NS_VK_QUESTION_MARK;
+    case '@': return NS_VK_AT;
+    case '^': return NS_VK_CIRCUMFLEX;
+    case '!': return NS_VK_EXCLAMATION;
+    case '"': return NS_VK_DOUBLE_QUOTE;
+    case '#': return NS_VK_HASH;
+    case '$': return NS_VK_DOLLAR;
+    case '%': return NS_VK_PERCENT;
+    case '&': return NS_VK_AMPERSAND;
+    case '_': return NS_VK_UNDERSCORE;
+    case '(': return NS_VK_OPEN_PAREN;
+    case ')': return NS_VK_CLOSE_PAREN;
+    case '*': return NS_VK_ASTERISK;
+    case '+': return NS_VK_PLUS;
+    case '|': return NS_VK_PIPE;
+    case '-': return NS_VK_HYPHEN_MINUS;
+    case '{': return NS_VK_OPEN_CURLY_BRACKET;
+    case '}': return NS_VK_CLOSE_CURLY_BRACKET;
+    case '~': return NS_VK_TILDE;
+    case ',': return NS_VK_COMMA;
+    case '.': return NS_VK_PERIOD;
+    case '/': return NS_VK_SLASH;
+    case '`': return NS_VK_BACK_QUOTE;
+    case '[': return NS_VK_OPEN_BRACKET;
+    case '\\': return NS_VK_BACK_SLASH;
+    case ']': return NS_VK_CLOSE_BRACKET;
+    case '\'': return NS_VK_QUOTE;
+  }
+  return 0;
+}
+
+// static
+void
+WidgetUtils::GetLatinCharCodeForKeyCode(uint32_t aKeyCode,
+                                        bool aIsCapsLock,
+                                        uint32_t* aUnshiftedCharCode,
+                                        uint32_t* aShiftedCharCode)
+{
+  MOZ_ASSERT(aUnshiftedCharCode && aShiftedCharCode,
+             "aUnshiftedCharCode and aShiftedCharCode must not be NULL");
+
+  if (aKeyCode >= NS_VK_A && aKeyCode <= NS_VK_Z) {
+    *aUnshiftedCharCode = *aShiftedCharCode = aKeyCode;
+    if (aIsCapsLock) {
+      *aShiftedCharCode += 0x20;
+    } else {
+      *aUnshiftedCharCode += 0x20;
+    }
+    return;
+  }
+
+  // aShiftedCharCode must be zero for non-alphabet keys.
+  *aShiftedCharCode = 0;
+
+  if (aKeyCode >= NS_VK_0 && aKeyCode <= NS_VK_9) {
+    *aUnshiftedCharCode = aKeyCode;
+    return;
+  }
+
+  switch (aKeyCode) {
+    case NS_VK_SPACE:               *aUnshiftedCharCode = ' '; break;
+    case NS_VK_COLON:               *aUnshiftedCharCode = ':'; break;
+    case NS_VK_SEMICOLON:           *aUnshiftedCharCode = ';'; break;
+    case NS_VK_LESS_THAN:           *aUnshiftedCharCode = '<'; break;
+    case NS_VK_EQUALS:              *aUnshiftedCharCode = '='; break;
+    case NS_VK_GREATER_THAN:        *aUnshiftedCharCode = '>'; break;
+    case NS_VK_QUESTION_MARK:       *aUnshiftedCharCode = '?'; break;
+    case NS_VK_AT:                  *aUnshiftedCharCode = '@'; break;
+    case NS_VK_CIRCUMFLEX:          *aUnshiftedCharCode = '^'; break;
+    case NS_VK_EXCLAMATION:         *aUnshiftedCharCode = '!'; break;
+    case NS_VK_DOUBLE_QUOTE:        *aUnshiftedCharCode = '"'; break;
+    case NS_VK_HASH:                *aUnshiftedCharCode = '#'; break;
+    case NS_VK_DOLLAR:              *aUnshiftedCharCode = '$'; break;
+    case NS_VK_PERCENT:             *aUnshiftedCharCode = '%'; break;
+    case NS_VK_AMPERSAND:           *aUnshiftedCharCode = '&'; break;
+    case NS_VK_UNDERSCORE:          *aUnshiftedCharCode = '_'; break;
+    case NS_VK_OPEN_PAREN:          *aUnshiftedCharCode = '('; break;
+    case NS_VK_CLOSE_PAREN:         *aUnshiftedCharCode = ')'; break;
+    case NS_VK_ASTERISK:            *aUnshiftedCharCode = '*'; break;
+    case NS_VK_PLUS:                *aUnshiftedCharCode = '+'; break;
+    case NS_VK_PIPE:                *aUnshiftedCharCode = '|'; break;
+    case NS_VK_HYPHEN_MINUS:        *aUnshiftedCharCode = '-'; break;
+    case NS_VK_OPEN_CURLY_BRACKET:  *aUnshiftedCharCode = '{'; break;
+    case NS_VK_CLOSE_CURLY_BRACKET: *aUnshiftedCharCode = '}'; break;
+    case NS_VK_TILDE:               *aUnshiftedCharCode = '~'; break;
+    case NS_VK_COMMA:               *aUnshiftedCharCode = ','; break;
+    case NS_VK_PERIOD:              *aUnshiftedCharCode = '.'; break;
+    case NS_VK_SLASH:               *aUnshiftedCharCode = '/'; break;
+    case NS_VK_BACK_QUOTE:          *aUnshiftedCharCode = '`'; break;
+    case NS_VK_OPEN_BRACKET:        *aUnshiftedCharCode = '['; break;
+    case NS_VK_BACK_SLASH:          *aUnshiftedCharCode = '\\'; break;
+    case NS_VK_CLOSE_BRACKET:       *aUnshiftedCharCode = ']'; break;
+    case NS_VK_QUOTE:               *aUnshiftedCharCode = '\''; break;
+    default:                        *aUnshiftedCharCode = 0; break;
+  }
+}
+
+// static
+KeyNameIndex
+WidgetUtils::GetDeadKeyNameIndex(char16_t aChar)
+{
+  switch (aChar) {
+    case '`':
+    case 0x02CB: // MODIFIER LETTER GRAVE ACCENT
+    case 0x0300: // COMBINING GRAVE ACCENT
+      return KEY_NAME_INDEX_DeadGrave;
+    case '\'':
+    case 0x00B4: // ACUTE ACCENT
+    case 0x02B9: // MODIFIER LETTER PRIME
+    case 0x02CA: // MODIFIER LETTER ACUTE ACCENT
+    case 0x0301: // COMBINING ACUTE ACCENT
+    case 0x0384: // GREEK TONOS
+      return KEY_NAME_INDEX_DeadAcute;
+    case '^':
+    case 0x02C6: // MODIFIER LETTER CIRCUMFLEX ACCENT
+    case 0x0302: // COMBINING CIRCUMFLEX ACCENT
+      return KEY_NAME_INDEX_DeadCircumflex;
+    case '~':
+    case 0x02DC: // SMALL TILDE
+    case 0x0303: // COMBINING TILDE
+      return KEY_NAME_INDEX_DeadTilde;
+    case 0x00AF: // MACRON
+    case 0x02C9: // MODIFIER LETTER MACRON
+    case 0x0304: // COMBINING MACRON
+      return KEY_NAME_INDEX_DeadMacron;
+    case 0x02D8: // BRAVE
+    case 0xA67C: // COMBINING CYRILLIC KAVYKA
+    case 0x0306: // COMBINING BRAVE
+      return KEY_NAME_INDEX_DeadBreve;
+    case 0x02D9: // DOT ABOVE
+    case 0x0307: // COMBINING DOT ABOVE
+      return KEY_NAME_INDEX_DeadAboveDot;
+    case 0x00A8: // DIAERESIS
+    case 0x0308: // COMBINING DIAERESIS
+      return KEY_NAME_INDEX_DeadUmlaut;
+    case 0x00B0: // DEGREE SIGN
+    case 0x02DA: // RING ABOVE
+    case 0x030A: // COMBINING RING ABOVE
+      return KEY_NAME_INDEX_DeadAboveRing;
+    case '"':
+    case 0x02BA: // MODIFIER LETTER DOUBLE PRIME
+    case 0x02DD: // DOUBLE ACUTE ACCENT
+    case 0x030B: // COMBINING DOUBLE ACUTE ACCENT
+      return KEY_NAME_INDEX_DeadDoubleacute;
+    case 0x02C7: // CARON
+    case 0x030C: // COMBINING CARON
+      return KEY_NAME_INDEX_DeadCaron;
+    case 0x00B8: // CEDILLA
+    case 0x0327: // COMBINING CEDILLA
+      return KEY_NAME_INDEX_DeadCedilla;
+    case 0x02DB: // OGONEK
+    case 0x0328: // COMBINING OGONEK
+      return KEY_NAME_INDEX_DeadOgonek;
+    case 0x0345: // COMBINING GREEK YPOGEGRAMMENI
+    case 0x037A: // GREEK YPOGEGRAMMENI
+    case 0x0399: // GREEK CAPITAL LETTER IOTA
+      return KEY_NAME_INDEX_DeadIota;
+    case 0x3099: // COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK
+    case 0x309B: // KATAKANA-HIRAGANA VOICED SOUND MARK
+      return KEY_NAME_INDEX_DeadVoicedSound;
+    case 0x309A: // COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
+    case 0x309C: // KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
+      return KEY_NAME_INDEX_DeadSemivoicedSound;
+    default:
+      return KEY_NAME_INDEX_Unidentified;
+  }
+}
+
+} // namespace widget
+} // namespace mozilla