Add emoji icon and code as a groundwork

The emoji switching key icon asset should be updated. The icons in
this change are just borrowed from Hangout.

Bug: 10179862
Bug: 6370846
Change-Id: Icea26d2cf2ac6a6df9beb4c98f646dbe309bdcd9

java/res/values/attrs.xml

@@ -217,6 +217,7 @@
         <attr name="iconLanguageSwitchKey" format="reference" />
         <attr name="iconZwnjKey" format="reference" />
         <attr name="iconZwjKey" format="reference" />
+        <attr name="iconEmojiKey" format="reference" />
     </declare-styleable>
 
     <declare-styleable name="Keyboard_Key">

java/res/values/keyboard-icons-black.xml

@@ -39,5 +39,6 @@
         <!-- TODO: Needs dedicated black theme ZWNJ and ZWJ icons -->
         <item name="iconZwnjKey">@drawable/sym_keyboard_zwnj_holo</item>
         <item name="iconZwjKey">@drawable/sym_keyboard_zwj_holo</item>
+        <item name="iconEmojiKey">@drawable/ic_emoji_light</item>
     </style>
 </resources>

java/res/values/keyboard-icons-ics.xml

@@ -36,5 +36,6 @@
         <item name="iconLanguageSwitchKey">@drawable/sym_keyboard_language_switch</item>
         <item name="iconZwnjKey">@drawable/sym_keyboard_zwnj_holo</item>
         <item name="iconZwjKey">@drawable/sym_keyboard_zwj_holo</item>
+        <item name="iconEmojiKey">@drawable/ic_emoji_light</item>
     </style>
 </resources>

java/res/values/keyboard-icons-white.xml

@@ -35,5 +35,6 @@
         <!-- TODO: Needs dedicated black theme ZWNJ and ZWJ icons -->
         <item name="iconZwnjKey">@drawable/sym_keyboard_zwnj_holo</item>
         <item name="iconZwjKey">@drawable/sym_keyboard_zwj_holo</item>
+        <item name="iconEmojiKey">@drawable/ic_emoji_dark</item>
     </style>
 </resources>

java/res/xml-sw600dp/key_styles_common.xml

@@ -119,6 +119,11 @@
         latin:keyIcon="!icon/language_switch_key"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping|enableLongPress"
         latin:altCode="!code/key_space" />
+    <key-style
+        latin:styleName="emojiKeyStyle"
+        latin:code="!code/key_emoji"
+        latin:keyIcon="!icon/emoji_key"
+        latin:keyActionFlags="noKeyPreview" />
     <key-style
         latin:styleName="settingsKeyStyle"
         latin:code="!code/key_settings"

java/res/xml-sw600dp/rows_10_10_7_symbols.xml

@@ -43,7 +43,7 @@
             latin:keyStyle="enterKeyStyle"
             latin:keyWidth="fillRight" />
     </Row>
-        <Row
+    <Row
         latin:keyWidth="9.0%p"
     >
         <Key

java/res/xml-sw768dp/key_styles_common.xml

@@ -109,6 +109,11 @@
         latin:keyIcon="!icon/language_switch_key"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping|enableLongPress"
         latin:altCode="!code/key_space" />
+    <key-style
+        latin:styleName="emojiKeyStyle"
+        latin:code="!code/key_emoji"
+        latin:keyIcon="!icon/emoji_key"
+        latin:keyActionFlags="noKeyPreview" />
     <key-style
         latin:styleName="settingsKeyStyle"
         latin:code="!code/key_settings"

java/res/xml/key_styles_common.xml

@@ -125,6 +125,11 @@
         latin:keyIcon="!icon/language_switch_key"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping|enableLongPress"
         latin:altCode="!code/key_space" />
+    <key-style
+        latin:styleName="emojiKeyStyle"
+        latin:code="!code/key_emoji"
+        latin:keyIcon="!icon/emoji_key"
+        latin:keyActionFlags="noKeyPreview" />
     <key-style
         latin:styleName="tabKeyStyle"
         latin:code="!code/key_tab"

java/src/com/android/inputmethod/keyboard/internal/KeyboardCodesSet.java

@@ -53,6 +53,7 @@ public final class KeyboardCodesSet {
         "key_action_previous",
         "key_shift_enter",
         "key_language_switch",
+        "key_emoji",
         "key_unspecified",
         "key_left_parenthesis",
         "key_right_parenthesis",
@@ -89,6 +90,7 @@ public final class KeyboardCodesSet {
         Constants.CODE_ACTION_PREVIOUS,
         Constants.CODE_SHIFT_ENTER,
         Constants.CODE_LANGUAGE_SWITCH,
+        Constants.CODE_EMOJI,
         Constants.CODE_UNSPECIFIED,
         CODE_LEFT_PARENTHESIS,
         CODE_RIGHT_PARENTHESIS,
@@ -116,6 +118,7 @@ public final class KeyboardCodesSet {
         DEFAULT[12],
         DEFAULT[13],
         DEFAULT[14],
+        DEFAULT[15],
         CODE_RIGHT_PARENTHESIS,
         CODE_LEFT_PARENTHESIS,
         CODE_GREATER_THAN_SIGN,

java/src/com/android/inputmethod/keyboard/internal/KeyboardIconsSet.java

@@ -56,6 +56,7 @@ public final class KeyboardIconsSet {
         "language_switch_key",          R.styleable.Keyboard_iconLanguageSwitchKey,
         "zwnj_key",                     R.styleable.Keyboard_iconZwnjKey,
         "zwj_key",                      R.styleable.Keyboard_iconZwjKey,
+        "emoji_key",                    R.styleable.Keyboard_iconEmojiKey,
     };
 
     private static int NUM_ICONS = NAMES_AND_ATTR_IDS.length / 2;

java/src/com/android/inputmethod/latin/Constants.java

@@ -187,6 +187,7 @@ public final class Constants {
     public static final int CODE_ACTION_NEXT = -8;
     public static final int CODE_ACTION_PREVIOUS = -9;
     public static final int CODE_LANGUAGE_SWITCH = -10;
+    public static final int CODE_EMOJI = -11;
     public static final int CODE_SHIFT_ENTER = -12;
     // Code value representing the code is not specified.
     public static final int CODE_UNSPECIFIED = -13;
@@ -207,6 +208,7 @@ public final class Constants {
         case CODE_ACTION_NEXT: return "actionNext";
         case CODE_ACTION_PREVIOUS: return "actionPrevious";
         case CODE_LANGUAGE_SWITCH: return "languageSwitch";
+        case CODE_EMOJI: return "emoji";
         case CODE_SHIFT_ENTER: return "shiftEnter";
         case CODE_UNSPECIFIED: return "unspec";
         case CODE_TAB: return "tab";

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -1512,6 +1512,9 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         case Constants.CODE_LANGUAGE_SWITCH:
             handleLanguageSwitchKey();
             break;
+        case Constants.CODE_EMOJI:
+            // TODO: Implement emoji keyboard switch.
+            break;
         case Constants.CODE_ENTER:
             final EditorInfo editorInfo = getCurrentInputEditorInfo();
             final int imeOptionsActionId =