8139189: Review request for 8139189: VK_OEM_102 dead key detected as VK_UNDEFINED

Reviewed-by: alexsch

jdk/src/java.desktop/windows/native/libawt/windows/awt_Component.cpp

@@ -257,6 +257,8 @@ AwtComponent::AwtComponent()
         AwtComponent::BuildPrimaryDynamicTable();
         sm_PrimaryDynamicTableBuilt = TRUE;
     }
+
+    deadKeyActive = FALSE;
 }
 
 AwtComponent::~AwtComponent()
@@ -2952,6 +2954,7 @@ static const CharToVKEntry charToDeadVKTable[] = {
     {0x037A, java_awt_event_KeyEvent_VK_DEAD_IOTA},             // ASCII ???
     {0x309B, java_awt_event_KeyEvent_VK_DEAD_VOICED_SOUND},
     {0x309C, java_awt_event_KeyEvent_VK_DEAD_SEMIVOICED_SOUND},
+    {0x0004, java_awt_event_KeyEvent_VK_COMPOSE},
     {0,0}
 };
 
@@ -3444,8 +3447,9 @@ UINT AwtComponent::WindowsKeyToJavaChar(UINT wkey, UINT modifiers, TransOps ops,
     AwtToolkit::GetKeyboardState(keyboardState);
 
     // apply modifiers to keyboard state if necessary
+    BOOL shiftIsDown = FALSE;
     if (modifiers) {
-        BOOL shiftIsDown = modifiers & java_awt_event_InputEvent_SHIFT_DOWN_MASK;
+        shiftIsDown = modifiers & java_awt_event_InputEvent_SHIFT_DOWN_MASK;
         BOOL altIsDown = modifiers & java_awt_event_InputEvent_ALT_DOWN_MASK;
         BOOL ctrlIsDown = modifiers & java_awt_event_InputEvent_CTRL_DOWN_MASK;
 
@@ -3517,18 +3521,27 @@ UINT AwtComponent::WindowsKeyToJavaChar(UINT wkey, UINT modifiers, TransOps ops,
         } // ctrlIsDown
     } // modifiers
 
-    // instead of creating our own conversion tables, I'll let Win32
-    // convert the character for me.
     WORD wChar[2];
-    UINT scancode = ::MapVirtualKey(wkey, 0);
-    int converted = ::ToUnicodeEx(wkey, scancode, keyboardState,
-                                  wChar, 2, 0, GetKeyboardLayout());
+    int converted = 1;
+    UINT ch = ::MapVirtualKey(wkey, 2);
+    if (ch & 0x80000000) {
+        // Dead key which is handled as a normal key
+        isDeadKey = deadKeyActive = TRUE;
+    } else if (deadKeyActive) {
+        // We cannot use ::ToUnicodeEx if dead key is active because this will
+        // break dead key function
+        wChar[0] = shiftIsDown ? ch : tolower(ch);
+    } else {
+        UINT scancode = ::MapVirtualKey(wkey, 0);
+        converted = ::ToUnicodeEx(wkey, scancode, keyboardState,
+                                              wChar, 2, 0, GetKeyboardLayout());
+    }
 
     UINT translation;
     BOOL deadKeyFlag = (converted == 2);
 
     // Dead Key
-    if (converted < 0) {
+    if (converted < 0 || wChar[0] == 0 || isDeadKey) {
         translation = java_awt_event_KeyEvent_CHAR_UNDEFINED;
     } else
     // No translation available -- try known conversions or else punt.
@@ -3682,6 +3695,8 @@ MsgRouting AwtComponent::WmIMEChar(UINT character, UINT repCnt, UINT flags, BOOL
 MsgRouting AwtComponent::WmChar(UINT character, UINT repCnt, UINT flags,
                                 BOOL system)
 {
+    deadKeyActive = FALSE;
+
     // Will only get WmChar messages with DBCS if we create them for
     // an Edit class in the WmForwardChar method. These synthesized
     // DBCS chars are ok to pass on directly to the default window

jdk/src/java.desktop/windows/native/libawt/windows/awt_Component.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -826,6 +826,8 @@ private:
     // 6524352: support finer-resolution
     int m_wheelRotationAmount;
 
+    BOOL deadKeyActive;
+
     /*
      * The association list of children's IDs and corresponding components.
      * Some components like Choice or List are required their sizes while

jdk/test/java/awt/InputMethods/DiacriticsTest/DiacriticsTest.html

@@ -1,5 +1,5 @@
 <!--
-Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 
 This code is free software; you can redistribute it and/or modify it
@@ -31,6 +31,8 @@ questions.
 Test run requires the following keyboard layouts to be installed:
 Linux OS: English (US, alternative international)
 Windows OS: Hungarian
+A keyboard layout having compose function or compose-like key. Programmer
+Dvorak (http://www.kaufmann.no/roland/dvorak/) is suggested to use.
 
 To test JDK-8000423 fix (Linux only!):
 please switch to US alternative international layout and try to type diacritics
@@ -40,6 +42,12 @@ To test JDK-7197619 fix (Windows only!):
 please switch to Hungarian keyboard layout and try to type diacritics 
 (Ctrl+Alt+2 e; Ctrl+Alt+2 E)
 
+To test JDK-8139189 fix:
+please switch to Programmer Dvorak keyboard layout try to type diacritics
+using compose combinations (Compose+z+d, Compose+z+Shift+d). The Compose key
+in Programmer Dvorak layout is OEM102 the key which is located between
+Left Shift and Z keys on the standard 102-key keyboard.
+
 If you can do that then the test is passed; otherwise failed.
 </body>
 </html>