Add keycodes and meta-key modifiers to support external keyboards.

Added new key maps for external keyboards.  These maps are intended to
be shared across devices by inheriting the "keyboards.mk" product
makefile as part of the device's product definition.

One of the trickier changes here was to unwind some code in
MetaKeyKeyListener that assumed that only the low 8 bits of the meta key
state were actually used.  The new code abandons bitshifts in favor
of simple conditionals that are probably easier to read anyways.
The special meta key state constants used by MetaKeyKeyListener
are now (@hide) defined in KeyEvent now so as to make it clearer that they
share the same code space even if those codes are not valid for KeyEvents.

The EventHub now takes care of detecting the appropriate key layout
map and key character map when the device is added and sets system
properties accordingly.  This avoids having duplicate code in
KeyCharacterMap to probe for the appropriate key character map
although the current probing mechanism has been preserved for legacy
reasons just in case.

Added support for tracking caps lock, num lock and scroll lock and
turning their corresponding LEDs on and off as needed.

The key character map format will need to be updated to correctly support
PC style external keyboard semantics related to modifier keys.
That will come in a later change so caps lock doesn't actually do
anything right now except turn the shiny LEDs on and off...

Added a list of symbolic key names to KeyEvent and improved the toString()
output for debug diagnosis.  Having this list in a central place in the
framework also allows us to remove it from Monkey so there is one less
thing to maintain when we add new keycodes.

Bug: 2912307
Change-Id: If8c25e8d50a7c29bbf5d663c94284f5f86de5da4

2 files changed, 85 insertions, 1 deletions

diff --git a/native/include/android/input.h b/native/include/android/input.h
index 5580700..d190e49 100644
--- a/native/include/android/input.h
+++ b/native/include/android/input.h
@@ -93,7 +93,37 @@ enum {
     AMETA_SHIFT_RIGHT_ON = 0x80,
 
     /* This mask is used to check whether the SYM meta key is pressed. */
-    AMETA_SYM_ON = 0x04
+    AMETA_SYM_ON = 0x04,
+
+    /* This mask is used to check whether the FUNCTION meta key is pressed. */
+    AMETA_FUNCTION_ON = 0x08,
+
+    /* This mask is used to check whether one of the CTRL meta keys is pressed. */
+    AMETA_CTRL_ON = 0x1000,
+
+    /* This mask is used to check whether the left CTRL meta key is pressed. */
+    AMETA_CTRL_LEFT_ON = 0x2000,
+
+    /* This mask is used to check whether the right CTRL meta key is pressed. */
+    AMETA_CTRL_RIGHT_ON = 0x4000,
+
+    /* This mask is used to check whether one of the META meta keys is pressed. */
+    AMETA_META_ON = 0x10000,
+
+    /* This mask is used to check whether the left META meta key is pressed. */
+    AMETA_META_LEFT_ON = 0x20000,
+
+    /* This mask is used to check whether the right META meta key is pressed. */
+    AMETA_META_RIGHT_ON = 0x40000,
+
+    /* This mask is used to check whether the CAPS LOCK meta key is latched. */
+    AMETA_CAPS_LOCK_LATCHED = 0x100000,
+
+    /* This mask is used to check whether the NUM LOCK meta key is latched. */
+    AMETA_NUM_LOCK_LATCHED = 0x200000,
+
+    /* This mask is used to check whether the SCROLL LOCK meta key is latched. */
+    AMETA_SCROLL_LOCK_LATCHED = 0x400000,
 };
 
 /*
diff --git a/native/include/android/keycodes.h b/native/include/android/keycodes.h
index 496eccc..3fcf977 100644
--- a/native/include/android/keycodes.h
+++ b/native/include/android/keycodes.h
@@ -154,6 +154,60 @@ enum {
     AKEYCODE_BUTTON_START    = 108,
     AKEYCODE_BUTTON_SELECT   = 109,
     AKEYCODE_BUTTON_MODE     = 110,
+    AKEYCODE_ESCAPE          = 111,
+    AKEYCODE_FORWARD_DEL     = 112,
+    AKEYCODE_CTRL_LEFT       = 113,
+    AKEYCODE_CTRL_RIGHT      = 114,
+    AKEYCODE_CAPS_LOCK       = 115,
+    AKEYCODE_SCROLL_LOCK     = 116,
+    AKEYCODE_META_LEFT       = 117,
+    AKEYCODE_META_RIGHT      = 118,
+    AKEYCODE_FUNCTION        = 119,
+    AKEYCODE_SYSRQ           = 120,
+    AKEYCODE_BREAK           = 121,
+    AKEYCODE_MOVE_HOME       = 122,
+    AKEYCODE_MOVE_END        = 123,
+    AKEYCODE_INSERT          = 124,
+    AKEYCODE_FORWARD         = 125,
+    AKEYCODE_MEDIA_PLAY      = 126,
+    AKEYCODE_MEDIA_PAUSE     = 127,
+    AKEYCODE_MEDIA_CLOSE     = 128,
+    AKEYCODE_MEDIA_EJECT     = 129,
+    AKEYCODE_MEDIA_RECORD    = 130,
+    AKEYCODE_F1              = 131,
+    AKEYCODE_F2              = 132,
+    AKEYCODE_F3              = 133,
+    AKEYCODE_F4              = 134,
+    AKEYCODE_F5              = 135,
+    AKEYCODE_F6              = 136,
+    AKEYCODE_F7              = 137,
+    AKEYCODE_F8              = 138,
+    AKEYCODE_F9              = 139,
+    AKEYCODE_F10             = 140,
+    AKEYCODE_F11             = 141,
+    AKEYCODE_F12             = 142,
+    AKEYCODE_NUM_LOCK        = 143,
+    AKEYCODE_NUMPAD_0        = 144,
+    AKEYCODE_NUMPAD_1        = 145,
+    AKEYCODE_NUMPAD_2        = 146,
+    AKEYCODE_NUMPAD_3        = 147,
+    AKEYCODE_NUMPAD_4        = 148,
+    AKEYCODE_NUMPAD_5        = 149,
+    AKEYCODE_NUMPAD_6        = 150,
+    AKEYCODE_NUMPAD_7        = 151,
+    AKEYCODE_NUMPAD_8        = 152,
+    AKEYCODE_NUMPAD_9        = 153,
+    AKEYCODE_NUMPAD_DIVIDE   = 154,
+    AKEYCODE_NUMPAD_MULTIPLY = 155,
+    AKEYCODE_NUMPAD_SUBTRACT = 156,
+    AKEYCODE_NUMPAD_ADD      = 157,
+    AKEYCODE_NUMPAD_DOT      = 158,
+    AKEYCODE_NUMPAD_COMMA    = 159,
+    AKEYCODE_NUMPAD_ENTER    = 160,
+    AKEYCODE_NUMPAD_EQUALS   = 161,
+    AKEYCODE_NUMPAD_LEFT_PAREN = 162,
+    AKEYCODE_NUMPAD_RIGHT_PAREN = 163,
+
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.